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efrain |
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<?php
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// This file is part of Moodle - http://moodle.org/
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//
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// Moodle is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// Moodle is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with Moodle. If not, see <http://www.gnu.org/licenses/>.
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/**
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* This file contains functions for managing user access
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*
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* <b>Public API vs internals</b>
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*
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* General users probably only care about
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*
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* Context handling
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* - context_course::instance($courseid), context_module::instance($cm->id), context_coursecat::instance($catid)
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* - context::instance_by_id($contextid)
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* - $context->get_parent_contexts();
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* - $context->get_child_contexts();
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*
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* Whether the user can do something...
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* - has_capability()
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* - has_any_capability()
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* - has_all_capabilities()
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* - require_capability()
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* - require_login() (from moodlelib)
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* - is_enrolled()
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* - is_viewing()
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* - is_guest()
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* - is_siteadmin()
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* - isguestuser()
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* - isloggedin()
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*
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* What courses has this user access to?
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* - get_enrolled_users()
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*
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* What users can do X in this context?
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* - get_enrolled_users() - at and bellow course context
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* - get_users_by_capability() - above course context
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*
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* Modify roles
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* - role_assign()
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* - role_unassign()
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* - role_unassign_all()
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*
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* Advanced - for internal use only
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* - load_all_capabilities()
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* - reload_all_capabilities()
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* - has_capability_in_accessdata()
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* - get_user_roles_sitewide_accessdata()
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* - etc.
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*
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* <b>Name conventions</b>
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*
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* "ctx" means context
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* "ra" means role assignment
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* "rdef" means role definition
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*
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* <b>accessdata</b>
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*
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* Access control data is held in the "accessdata" array
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* which - for the logged-in user, will be in $USER->access
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*
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* For other users can be generated and passed around (but may also be cached
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* against userid in $ACCESSLIB_PRIVATE->accessdatabyuser).
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*
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* $accessdata is a multidimensional array, holding
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* role assignments (RAs), role switches and initialization time.
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*
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* Things are keyed on "contextpaths" (the path field of
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* the context table) for fast walking up/down the tree.
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* <code>
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* $accessdata['ra'][$contextpath] = array($roleid=>$roleid)
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* [$contextpath] = array($roleid=>$roleid)
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* [$contextpath] = array($roleid=>$roleid)
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* </code>
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*
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* <b>Stale accessdata</b>
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*
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* For the logged-in user, accessdata is long-lived.
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*
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* On each pageload we load $ACCESSLIB_PRIVATE->dirtycontexts which lists
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* context paths affected by changes. Any check at-or-below
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* a dirty context will trigger a transparent reload of accessdata.
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*
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* Changes at the system level will force the reload for everyone.
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*
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* <b>Default role caps</b>
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* The default role assignment is not in the DB, so we
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* add it manually to accessdata.
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*
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* This means that functions that work directly off the
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* DB need to ensure that the default role caps
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* are dealt with appropriately.
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*
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* @package core_access
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* @copyright 1999 onwards Martin Dougiamas http://dougiamas.com
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* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
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*/
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defined('MOODLE_INTERNAL') || die();
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/** No capability change */
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define('CAP_INHERIT', 0);
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/** Allow permission, overrides CAP_PREVENT defined in parent contexts */
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define('CAP_ALLOW', 1);
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/** Prevent permission, overrides CAP_ALLOW defined in parent contexts */
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define('CAP_PREVENT', -1);
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/** Prohibit permission, overrides everything in current and child contexts */
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define('CAP_PROHIBIT', -1000);
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/** System context level - only one instance in every system */
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define('CONTEXT_SYSTEM', 10);
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/** User context level - one instance for each user describing what others can do to user */
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define('CONTEXT_USER', 30);
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/** Course category context level - one instance for each category */
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define('CONTEXT_COURSECAT', 40);
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/** Course context level - one instances for each course */
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define('CONTEXT_COURSE', 50);
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/** Course module context level - one instance for each course module */
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define('CONTEXT_MODULE', 70);
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/**
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* Block context level - one instance for each block, sticky blocks are tricky
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* because ppl think they should be able to override them at lower contexts.
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* Any other context level instance can be parent of block context.
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*/
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define('CONTEXT_BLOCK', 80);
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/** Capability allow management of trusts - NOT IMPLEMENTED YET - see {@link https://moodledev.io/docs/apis/subsystems/roles} */
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define('RISK_MANAGETRUST', 0x0001);
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/** Capability allows changes in system configuration - see {@link https://moodledev.io/docs/apis/subsystems/roles} */
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define('RISK_CONFIG', 0x0002);
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/** Capability allows user to add scripted content - see {@link https://moodledev.io/docs/apis/subsystems/roles} */
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define('RISK_XSS', 0x0004);
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/** Capability allows access to personal user information - see {@link https://moodledev.io/docs/apis/subsystems/roles} */
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define('RISK_PERSONAL', 0x0008);
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/** Capability allows users to add content others may see - see {@link https://moodledev.io/docs/apis/subsystems/roles} */
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define('RISK_SPAM', 0x0010);
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/** capability allows mass delete of data belonging to other users - see {@link https://moodledev.io/docs/apis/subsystems/roles} */
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define('RISK_DATALOSS', 0x0020);
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/** rolename displays - the name as defined in the role definition, localised if name empty */
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define('ROLENAME_ORIGINAL', 0);
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/** rolename displays - the name as defined by a role alias at the course level, falls back to ROLENAME_ORIGINAL if alias not present */
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define('ROLENAME_ALIAS', 1);
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/** rolename displays - Both, like this: Role alias (Original) */
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define('ROLENAME_BOTH', 2);
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/** rolename displays - the name as defined in the role definition and the shortname in brackets */
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define('ROLENAME_ORIGINALANDSHORT', 3);
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/** rolename displays - the name as defined by a role alias, in raw form suitable for editing */
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define('ROLENAME_ALIAS_RAW', 4);
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/** rolename displays - the name is simply short role name */
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define('ROLENAME_SHORT', 5);
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if (!defined('CONTEXT_CACHE_MAX_SIZE')) {
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/** maximum size of context cache - it is possible to tweak this config.php or in any script before inclusion of context.php */
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define('CONTEXT_CACHE_MAX_SIZE', 2500);
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}
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/** Performance hint for assign_capability: the contextid is known to exist */
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define('ACCESSLIB_HINT_CONTEXT_EXISTS', 'contextexists');
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/** Performance hint for assign_capability: there is no existing entry in role_capabilities */
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define('ACCESSLIB_HINT_NO_EXISTING', 'notexists');
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/**
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* Although this looks like a global variable, it isn't really.
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*
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* It is just a private implementation detail to accesslib that MUST NOT be used elsewhere.
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* It is used to cache various bits of data between function calls for performance reasons.
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* Sadly, a PHP global variable is the only way to implement this, without rewriting everything
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* as methods of a class, instead of functions.
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*
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* @access private
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* @global stdClass $ACCESSLIB_PRIVATE
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* @name $ACCESSLIB_PRIVATE
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*/
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global $ACCESSLIB_PRIVATE;
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$ACCESSLIB_PRIVATE = new stdClass();
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$ACCESSLIB_PRIVATE->cacheroledefs = array(); // Holds site-wide role definitions.
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$ACCESSLIB_PRIVATE->dirtycontexts = null; // Dirty contexts cache, loaded from DB once per page
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$ACCESSLIB_PRIVATE->dirtyusers = null; // Dirty users cache, loaded from DB once per $USER->id
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$ACCESSLIB_PRIVATE->accessdatabyuser = array(); // Holds the cache of $accessdata structure for users (including $USER)
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/**
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* Clears accesslib's private caches. ONLY BE USED BY UNIT TESTS
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*
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* This method should ONLY BE USED BY UNIT TESTS. It clears all of
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* accesslib's private caches. You need to do this before setting up test data,
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* and also at the end of the tests.
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*
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* @access private
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* @return void
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*/
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function accesslib_clear_all_caches_for_unit_testing() {
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global $USER;
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if (!PHPUNIT_TEST) {
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throw new coding_exception('You must not call clear_all_caches outside of unit tests.');
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}
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accesslib_clear_all_caches(true);
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accesslib_reset_role_cache();
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unset($USER->access);
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}
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/**
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* Clears accesslib's private caches. ONLY BE USED FROM THIS LIBRARY FILE!
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*
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* This reset does not touch global $USER.
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*
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* @access private
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* @param bool $resetcontexts
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* @return void
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*/
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function accesslib_clear_all_caches($resetcontexts) {
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global $ACCESSLIB_PRIVATE;
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$ACCESSLIB_PRIVATE->dirtycontexts = null;
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$ACCESSLIB_PRIVATE->dirtyusers = null;
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$ACCESSLIB_PRIVATE->accessdatabyuser = array();
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if ($resetcontexts) {
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context_helper::reset_caches();
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}
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}
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/**
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* Full reset of accesslib's private role cache. ONLY TO BE USED FROM THIS LIBRARY FILE!
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*
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* This reset does not touch global $USER.
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*
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* Note: Only use this when the roles that need a refresh are unknown.
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*
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* @see accesslib_clear_role_cache()
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*
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* @access private
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* @return void
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*/
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function accesslib_reset_role_cache() {
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global $ACCESSLIB_PRIVATE;
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$ACCESSLIB_PRIVATE->cacheroledefs = array();
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$cache = cache::make('core', 'roledefs');
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$cache->purge();
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}
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/**
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* Clears accesslib's private cache of a specific role or roles. ONLY BE USED FROM THIS LIBRARY FILE!
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*
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* This reset does not touch global $USER.
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*
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* @access private
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* @param int|array $roles
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* @return void
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*/
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function accesslib_clear_role_cache($roles) {
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global $ACCESSLIB_PRIVATE;
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if (!is_array($roles)) {
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$roles = [$roles];
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}
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foreach ($roles as $role) {
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if (isset($ACCESSLIB_PRIVATE->cacheroledefs[$role])) {
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unset($ACCESSLIB_PRIVATE->cacheroledefs[$role]);
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}
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}
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$cache = cache::make('core', 'roledefs');
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$cache->delete_many($roles);
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}
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/**
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* Role is assigned at system context.
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*
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* @access private
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* @param int $roleid
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* @return array
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*/
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function get_role_access($roleid) {
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$accessdata = get_empty_accessdata();
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$accessdata['ra']['/'.SYSCONTEXTID] = array((int)$roleid => (int)$roleid);
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return $accessdata;
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}
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/**
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* Fetch raw "site wide" role definitions.
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* Even MUC static acceleration cache appears a bit slow for this.
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* Important as can be hit hundreds of times per page.
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*
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* @param array $roleids List of role ids to fetch definitions for.
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* @return array Complete definition for each requested role.
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*/
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function get_role_definitions(array $roleids) {
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global $ACCESSLIB_PRIVATE;
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if (empty($roleids)) {
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return array();
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}
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// Grab all keys we have not yet got in our static cache.
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if ($uncached = array_diff($roleids, array_keys($ACCESSLIB_PRIVATE->cacheroledefs))) {
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$cache = cache::make('core', 'roledefs');
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foreach ($cache->get_many($uncached) as $roleid => $cachedroledef) {
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if (is_array($cachedroledef)) {
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$ACCESSLIB_PRIVATE->cacheroledefs[$roleid] = $cachedroledef;
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}
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}
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// Check we have the remaining keys from the MUC.
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if ($uncached = array_diff($roleids, array_keys($ACCESSLIB_PRIVATE->cacheroledefs))) {
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$uncached = get_role_definitions_uncached($uncached);
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$ACCESSLIB_PRIVATE->cacheroledefs += $uncached;
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$cache->set_many($uncached);
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}
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}
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// Return just the roles we need.
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return array_intersect_key($ACCESSLIB_PRIVATE->cacheroledefs, array_flip($roleids));
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}
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/**
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* Query raw "site wide" role definitions.
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*
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* @param array $roleids List of role ids to fetch definitions for.
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* @return array Complete definition for each requested role.
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*/
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function get_role_definitions_uncached(array $roleids) {
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global $DB;
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if (empty($roleids)) {
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return array();
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|
|
342 |
}
|
|
|
343 |
|
|
|
344 |
// Create a blank results array: even if a role has no capabilities,
|
|
|
345 |
// we need to ensure it is included in the results to show we have
|
|
|
346 |
// loaded all the capabilities that there are.
|
|
|
347 |
$rdefs = array();
|
|
|
348 |
foreach ($roleids as $roleid) {
|
|
|
349 |
$rdefs[$roleid] = array();
|
|
|
350 |
}
|
|
|
351 |
|
|
|
352 |
// Load all the capabilities for these roles in all contexts.
|
|
|
353 |
list($sql, $params) = $DB->get_in_or_equal($roleids);
|
|
|
354 |
$sql = "SELECT ctx.path, rc.roleid, rc.capability, rc.permission
|
|
|
355 |
FROM {role_capabilities} rc
|
|
|
356 |
JOIN {context} ctx ON rc.contextid = ctx.id
|
|
|
357 |
JOIN {capabilities} cap ON rc.capability = cap.name
|
|
|
358 |
WHERE rc.roleid $sql";
|
|
|
359 |
$rs = $DB->get_recordset_sql($sql, $params);
|
|
|
360 |
|
|
|
361 |
// Store the capabilities into the expected data structure.
|
|
|
362 |
foreach ($rs as $rd) {
|
|
|
363 |
if (!isset($rdefs[$rd->roleid][$rd->path])) {
|
|
|
364 |
$rdefs[$rd->roleid][$rd->path] = array();
|
|
|
365 |
}
|
|
|
366 |
$rdefs[$rd->roleid][$rd->path][$rd->capability] = (int) $rd->permission;
|
|
|
367 |
}
|
|
|
368 |
|
|
|
369 |
$rs->close();
|
|
|
370 |
|
|
|
371 |
// Sometimes (e.g. get_user_capability_course_helper::get_capability_info_at_each_context)
|
|
|
372 |
// we process role definitinons in a way that requires we see parent contexts
|
|
|
373 |
// before child contexts. This sort ensures that works (and is faster than
|
|
|
374 |
// sorting in the SQL query).
|
|
|
375 |
foreach ($rdefs as $roleid => $rdef) {
|
|
|
376 |
ksort($rdefs[$roleid]);
|
|
|
377 |
}
|
|
|
378 |
|
|
|
379 |
return $rdefs;
|
|
|
380 |
}
|
|
|
381 |
|
|
|
382 |
/**
|
|
|
383 |
* Get the default guest role, this is used for guest account,
|
|
|
384 |
* search engine spiders, etc.
|
|
|
385 |
*
|
|
|
386 |
* @return stdClass|false role record
|
|
|
387 |
*/
|
|
|
388 |
function get_guest_role() {
|
|
|
389 |
global $CFG, $DB;
|
|
|
390 |
|
|
|
391 |
if (empty($CFG->guestroleid)) {
|
|
|
392 |
if ($roles = $DB->get_records('role', array('archetype'=>'guest'))) {
|
|
|
393 |
$guestrole = array_shift($roles); // Pick the first one
|
|
|
394 |
set_config('guestroleid', $guestrole->id);
|
|
|
395 |
return $guestrole;
|
|
|
396 |
} else {
|
|
|
397 |
debugging('Can not find any guest role!');
|
|
|
398 |
return false;
|
|
|
399 |
}
|
|
|
400 |
} else {
|
|
|
401 |
if ($guestrole = $DB->get_record('role', array('id'=>$CFG->guestroleid))) {
|
|
|
402 |
return $guestrole;
|
|
|
403 |
} else {
|
|
|
404 |
// somebody is messing with guest roles, remove incorrect setting and try to find a new one
|
|
|
405 |
set_config('guestroleid', '');
|
|
|
406 |
return get_guest_role();
|
|
|
407 |
}
|
|
|
408 |
}
|
|
|
409 |
}
|
|
|
410 |
|
|
|
411 |
/**
|
|
|
412 |
* Check whether a user has a particular capability in a given context.
|
|
|
413 |
*
|
|
|
414 |
* For example:
|
|
|
415 |
* $context = context_module::instance($cm->id);
|
|
|
416 |
* has_capability('mod/forum:replypost', $context)
|
|
|
417 |
*
|
|
|
418 |
* By default checks the capabilities of the current user, but you can pass a
|
|
|
419 |
* different userid. By default will return true for admin users, but you can override that with the fourth argument.
|
|
|
420 |
*
|
|
|
421 |
* Guest and not-logged-in users can never get any dangerous capability - that is any write capability
|
|
|
422 |
* or capabilities with XSS, config or data loss risks.
|
|
|
423 |
*
|
|
|
424 |
* @category access
|
|
|
425 |
*
|
|
|
426 |
* @param string $capability the name of the capability to check. For example mod/forum:view
|
|
|
427 |
* @param context $context the context to check the capability in. You normally get this with instance method of a context class.
|
|
|
428 |
* @param integer|stdClass $user A user id or object. By default (null) checks the permissions of the current user.
|
|
|
429 |
* @param boolean $doanything If false, ignores effect of admin role assignment
|
|
|
430 |
* @return boolean true if the user has this capability. Otherwise false.
|
|
|
431 |
*/
|
|
|
432 |
function has_capability($capability, context $context, $user = null, $doanything = true) {
|
|
|
433 |
global $USER, $CFG, $SCRIPT, $ACCESSLIB_PRIVATE;
|
|
|
434 |
|
|
|
435 |
if (during_initial_install()) {
|
|
|
436 |
if ($SCRIPT === "/$CFG->admin/index.php"
|
|
|
437 |
or $SCRIPT === "/$CFG->admin/cli/install.php"
|
|
|
438 |
or $SCRIPT === "/$CFG->admin/cli/install_database.php"
|
|
|
439 |
or (defined('BEHAT_UTIL') and BEHAT_UTIL)
|
|
|
440 |
or (defined('PHPUNIT_UTIL') and PHPUNIT_UTIL)) {
|
|
|
441 |
// we are in an installer - roles can not work yet
|
|
|
442 |
return true;
|
|
|
443 |
} else {
|
|
|
444 |
return false;
|
|
|
445 |
}
|
|
|
446 |
}
|
|
|
447 |
|
|
|
448 |
if (strpos($capability, 'moodle/legacy:') === 0) {
|
|
|
449 |
throw new coding_exception('Legacy capabilities can not be used any more!');
|
|
|
450 |
}
|
|
|
451 |
|
|
|
452 |
if (!is_bool($doanything)) {
|
|
|
453 |
throw new coding_exception('Capability parameter "doanything" is wierd, only true or false is allowed. This has to be fixed in code.');
|
|
|
454 |
}
|
|
|
455 |
|
|
|
456 |
// capability must exist
|
|
|
457 |
if (!$capinfo = get_capability_info($capability)) {
|
|
|
458 |
debugging('Capability "'.$capability.'" was not found! This has to be fixed in code.');
|
|
|
459 |
return false;
|
|
|
460 |
}
|
|
|
461 |
|
|
|
462 |
if (!isset($USER->id)) {
|
|
|
463 |
// should never happen
|
|
|
464 |
$USER->id = 0;
|
|
|
465 |
debugging('Capability check being performed on a user with no ID.', DEBUG_DEVELOPER);
|
|
|
466 |
}
|
|
|
467 |
|
|
|
468 |
// make sure there is a real user specified
|
|
|
469 |
if ($user === null) {
|
|
|
470 |
$userid = $USER->id;
|
|
|
471 |
} else {
|
|
|
472 |
$userid = is_object($user) ? $user->id : $user;
|
|
|
473 |
}
|
|
|
474 |
|
|
|
475 |
// make sure forcelogin cuts off not-logged-in users if enabled
|
|
|
476 |
if (!empty($CFG->forcelogin) and $userid == 0) {
|
|
|
477 |
return false;
|
|
|
478 |
}
|
|
|
479 |
|
|
|
480 |
// make sure the guest account and not-logged-in users never get any risky caps no matter what the actual settings are.
|
|
|
481 |
if (($capinfo->captype === 'write') or ($capinfo->riskbitmask & (RISK_XSS | RISK_CONFIG | RISK_DATALOSS))) {
|
|
|
482 |
if (isguestuser($userid) or $userid == 0) {
|
|
|
483 |
return false;
|
|
|
484 |
}
|
|
|
485 |
}
|
|
|
486 |
|
|
|
487 |
// Check whether context locking is enabled.
|
|
|
488 |
if (!empty($CFG->contextlocking)) {
|
|
|
489 |
if ($capinfo->captype === 'write' && $context->locked) {
|
|
|
490 |
// Context locking applies to any write capability in a locked context.
|
|
|
491 |
// It does not apply to moodle/site:managecontextlocks - this is to allow context locking to be unlocked.
|
|
|
492 |
if ($capinfo->name !== 'moodle/site:managecontextlocks') {
|
|
|
493 |
// It applies to all users who are not site admins.
|
|
|
494 |
// It also applies to site admins when contextlockappliestoadmin is set.
|
|
|
495 |
if (!is_siteadmin($userid) || !empty($CFG->contextlockappliestoadmin)) {
|
|
|
496 |
return false;
|
|
|
497 |
}
|
|
|
498 |
}
|
|
|
499 |
}
|
|
|
500 |
}
|
|
|
501 |
|
|
|
502 |
// somehow make sure the user is not deleted and actually exists
|
|
|
503 |
if ($userid != 0) {
|
|
|
504 |
if ($userid == $USER->id and isset($USER->deleted)) {
|
|
|
505 |
// this prevents one query per page, it is a bit of cheating,
|
|
|
506 |
// but hopefully session is terminated properly once user is deleted
|
|
|
507 |
if ($USER->deleted) {
|
|
|
508 |
return false;
|
|
|
509 |
}
|
|
|
510 |
} else {
|
|
|
511 |
if (!context_user::instance($userid, IGNORE_MISSING)) {
|
|
|
512 |
// no user context == invalid userid
|
|
|
513 |
return false;
|
|
|
514 |
}
|
|
|
515 |
}
|
|
|
516 |
}
|
|
|
517 |
|
|
|
518 |
// context path/depth must be valid
|
|
|
519 |
if (empty($context->path) or $context->depth == 0) {
|
|
|
520 |
// this should not happen often, each upgrade tries to rebuild the context paths
|
|
|
521 |
debugging('Context id '.$context->id.' does not have valid path, please use context_helper::build_all_paths()');
|
|
|
522 |
if (is_siteadmin($userid)) {
|
|
|
523 |
return true;
|
|
|
524 |
} else {
|
|
|
525 |
return false;
|
|
|
526 |
}
|
|
|
527 |
}
|
|
|
528 |
|
|
|
529 |
if (!empty($USER->loginascontext)) {
|
|
|
530 |
// The current user is logged in as another user and can assume their identity at or below the `loginascontext`
|
|
|
531 |
// defined in the USER session.
|
|
|
532 |
// The user may not assume their identity at any other location.
|
|
|
533 |
if (!$USER->loginascontext->is_parent_of($context, true)) {
|
|
|
534 |
// The context being checked is not the specified context, or one of its children.
|
|
|
535 |
return false;
|
|
|
536 |
}
|
|
|
537 |
}
|
|
|
538 |
|
|
|
539 |
// Find out if user is admin - it is not possible to override the doanything in any way
|
|
|
540 |
// and it is not possible to switch to admin role either.
|
|
|
541 |
if ($doanything) {
|
|
|
542 |
if (is_siteadmin($userid)) {
|
|
|
543 |
if ($userid != $USER->id) {
|
|
|
544 |
return true;
|
|
|
545 |
}
|
|
|
546 |
// make sure switchrole is not used in this context
|
|
|
547 |
if (empty($USER->access['rsw'])) {
|
|
|
548 |
return true;
|
|
|
549 |
}
|
|
|
550 |
$parts = explode('/', trim($context->path, '/'));
|
|
|
551 |
$path = '';
|
|
|
552 |
$switched = false;
|
|
|
553 |
foreach ($parts as $part) {
|
|
|
554 |
$path .= '/' . $part;
|
|
|
555 |
if (!empty($USER->access['rsw'][$path])) {
|
|
|
556 |
$switched = true;
|
|
|
557 |
break;
|
|
|
558 |
}
|
|
|
559 |
}
|
|
|
560 |
if (!$switched) {
|
|
|
561 |
return true;
|
|
|
562 |
}
|
|
|
563 |
//ok, admin switched role in this context, let's use normal access control rules
|
|
|
564 |
}
|
|
|
565 |
}
|
|
|
566 |
|
|
|
567 |
// Careful check for staleness...
|
|
|
568 |
$context->reload_if_dirty();
|
|
|
569 |
|
|
|
570 |
if ($USER->id == $userid) {
|
|
|
571 |
if (!isset($USER->access)) {
|
|
|
572 |
load_all_capabilities();
|
|
|
573 |
}
|
|
|
574 |
$access =& $USER->access;
|
|
|
575 |
|
|
|
576 |
} else {
|
|
|
577 |
// make sure user accessdata is really loaded
|
|
|
578 |
get_user_accessdata($userid, true);
|
|
|
579 |
$access =& $ACCESSLIB_PRIVATE->accessdatabyuser[$userid];
|
|
|
580 |
}
|
|
|
581 |
|
|
|
582 |
return has_capability_in_accessdata($capability, $context, $access);
|
|
|
583 |
}
|
|
|
584 |
|
|
|
585 |
/**
|
|
|
586 |
* Check if the user has any one of several capabilities from a list.
|
|
|
587 |
*
|
|
|
588 |
* This is just a utility method that calls has_capability in a loop. Try to put
|
|
|
589 |
* the capabilities that most users are likely to have first in the list for best
|
|
|
590 |
* performance.
|
|
|
591 |
*
|
|
|
592 |
* @category access
|
|
|
593 |
* @see has_capability()
|
|
|
594 |
*
|
|
|
595 |
* @param array $capabilities an array of capability names.
|
|
|
596 |
* @param context $context the context to check the capability in. You normally get this with instance method of a context class.
|
|
|
597 |
* @param integer|stdClass $user A user id or object. By default (null) checks the permissions of the current user.
|
|
|
598 |
* @param boolean $doanything If false, ignore effect of admin role assignment
|
|
|
599 |
* @return boolean true if the user has any of these capabilities. Otherwise false.
|
|
|
600 |
*/
|
|
|
601 |
function has_any_capability(array $capabilities, context $context, $user = null, $doanything = true) {
|
|
|
602 |
foreach ($capabilities as $capability) {
|
|
|
603 |
if (has_capability($capability, $context, $user, $doanything)) {
|
|
|
604 |
return true;
|
|
|
605 |
}
|
|
|
606 |
}
|
|
|
607 |
return false;
|
|
|
608 |
}
|
|
|
609 |
|
|
|
610 |
/**
|
|
|
611 |
* Check if the user has all the capabilities in a list.
|
|
|
612 |
*
|
|
|
613 |
* This is just a utility method that calls has_capability in a loop. Try to put
|
|
|
614 |
* the capabilities that fewest users are likely to have first in the list for best
|
|
|
615 |
* performance.
|
|
|
616 |
*
|
|
|
617 |
* @category access
|
|
|
618 |
* @see has_capability()
|
|
|
619 |
*
|
|
|
620 |
* @param array $capabilities an array of capability names.
|
|
|
621 |
* @param context $context the context to check the capability in. You normally get this with instance method of a context class.
|
|
|
622 |
* @param integer|stdClass $user A user id or object. By default (null) checks the permissions of the current user.
|
|
|
623 |
* @param boolean $doanything If false, ignore effect of admin role assignment
|
|
|
624 |
* @return boolean true if the user has all of these capabilities. Otherwise false.
|
|
|
625 |
*/
|
|
|
626 |
function has_all_capabilities(array $capabilities, context $context, $user = null, $doanything = true) {
|
|
|
627 |
foreach ($capabilities as $capability) {
|
|
|
628 |
if (!has_capability($capability, $context, $user, $doanything)) {
|
|
|
629 |
return false;
|
|
|
630 |
}
|
|
|
631 |
}
|
|
|
632 |
return true;
|
|
|
633 |
}
|
|
|
634 |
|
|
|
635 |
/**
|
|
|
636 |
* Is course creator going to have capability in a new course?
|
|
|
637 |
*
|
|
|
638 |
* This is intended to be used in enrolment plugins before or during course creation,
|
|
|
639 |
* do not use after the course is fully created.
|
|
|
640 |
*
|
|
|
641 |
* @category access
|
|
|
642 |
*
|
|
|
643 |
* @param string $capability the name of the capability to check.
|
|
|
644 |
* @param context $context course or category context where is course going to be created
|
|
|
645 |
* @param integer|stdClass $user A user id or object. By default (null) checks the permissions of the current user.
|
|
|
646 |
* @return boolean true if the user will have this capability.
|
|
|
647 |
*
|
|
|
648 |
* @throws coding_exception if different type of context submitted
|
|
|
649 |
*/
|
|
|
650 |
function guess_if_creator_will_have_course_capability($capability, context $context, $user = null) {
|
|
|
651 |
global $CFG;
|
|
|
652 |
|
|
|
653 |
if ($context->contextlevel != CONTEXT_COURSE and $context->contextlevel != CONTEXT_COURSECAT) {
|
|
|
654 |
throw new coding_exception('Only course or course category context expected');
|
|
|
655 |
}
|
|
|
656 |
|
|
|
657 |
if (has_capability($capability, $context, $user)) {
|
|
|
658 |
// User already has the capability, it could be only removed if CAP_PROHIBIT
|
|
|
659 |
// was involved here, but we ignore that.
|
|
|
660 |
return true;
|
|
|
661 |
}
|
|
|
662 |
|
|
|
663 |
if (!has_capability('moodle/course:create', $context, $user)) {
|
|
|
664 |
return false;
|
|
|
665 |
}
|
|
|
666 |
|
|
|
667 |
if (!enrol_is_enabled('manual')) {
|
|
|
668 |
return false;
|
|
|
669 |
}
|
|
|
670 |
|
|
|
671 |
if (empty($CFG->creatornewroleid)) {
|
|
|
672 |
return false;
|
|
|
673 |
}
|
|
|
674 |
|
|
|
675 |
if ($context->contextlevel == CONTEXT_COURSE) {
|
|
|
676 |
if (is_viewing($context, $user, 'moodle/role:assign') or is_enrolled($context, $user, 'moodle/role:assign')) {
|
|
|
677 |
return false;
|
|
|
678 |
}
|
|
|
679 |
} else {
|
|
|
680 |
if (has_capability('moodle/course:view', $context, $user) and has_capability('moodle/role:assign', $context, $user)) {
|
|
|
681 |
return false;
|
|
|
682 |
}
|
|
|
683 |
}
|
|
|
684 |
|
|
|
685 |
// Most likely they will be enrolled after the course creation is finished,
|
|
|
686 |
// does the new role have the required capability?
|
|
|
687 |
list($neededroles, $forbiddenroles) = get_roles_with_cap_in_context($context, $capability);
|
|
|
688 |
return isset($neededroles[$CFG->creatornewroleid]);
|
|
|
689 |
}
|
|
|
690 |
|
|
|
691 |
/**
|
|
|
692 |
* Check if the user is an admin at the site level.
|
|
|
693 |
*
|
|
|
694 |
* Please note that use of proper capabilities is always encouraged,
|
|
|
695 |
* this function is supposed to be used from core or for temporary hacks.
|
|
|
696 |
*
|
|
|
697 |
* @category access
|
|
|
698 |
*
|
|
|
699 |
* @param int|stdClass $user_or_id user id or user object
|
|
|
700 |
* @return bool true if user is one of the administrators, false otherwise
|
|
|
701 |
*/
|
|
|
702 |
function is_siteadmin($user_or_id = null) {
|
|
|
703 |
global $CFG, $USER;
|
|
|
704 |
|
|
|
705 |
if ($user_or_id === null) {
|
|
|
706 |
$user_or_id = $USER;
|
|
|
707 |
}
|
|
|
708 |
|
|
|
709 |
if (empty($user_or_id)) {
|
|
|
710 |
return false;
|
|
|
711 |
}
|
|
|
712 |
if (!empty($user_or_id->id)) {
|
|
|
713 |
$userid = $user_or_id->id;
|
|
|
714 |
} else {
|
|
|
715 |
$userid = $user_or_id;
|
|
|
716 |
}
|
|
|
717 |
|
|
|
718 |
// Because this script is called many times (150+ for course page) with
|
|
|
719 |
// the same parameters, it is worth doing minor optimisations. This static
|
|
|
720 |
// cache stores the value for a single userid, saving about 2ms from course
|
|
|
721 |
// page load time without using significant memory. As the static cache
|
|
|
722 |
// also includes the value it depends on, this cannot break unit tests.
|
|
|
723 |
static $knownid, $knownresult, $knownsiteadmins;
|
|
|
724 |
if ($knownid === $userid && $knownsiteadmins === $CFG->siteadmins) {
|
|
|
725 |
return $knownresult;
|
|
|
726 |
}
|
|
|
727 |
$knownid = $userid;
|
|
|
728 |
$knownsiteadmins = $CFG->siteadmins;
|
|
|
729 |
|
|
|
730 |
$siteadmins = explode(',', $CFG->siteadmins);
|
|
|
731 |
$knownresult = in_array($userid, $siteadmins);
|
|
|
732 |
return $knownresult;
|
|
|
733 |
}
|
|
|
734 |
|
|
|
735 |
/**
|
|
|
736 |
* Returns true if user has at least one role assign
|
|
|
737 |
* of 'coursecontact' role (is potentially listed in some course descriptions).
|
|
|
738 |
*
|
|
|
739 |
* @param int $userid
|
|
|
740 |
* @return bool
|
|
|
741 |
*/
|
|
|
742 |
function has_coursecontact_role($userid) {
|
|
|
743 |
global $DB, $CFG;
|
|
|
744 |
|
|
|
745 |
if (empty($CFG->coursecontact)) {
|
|
|
746 |
return false;
|
|
|
747 |
}
|
|
|
748 |
$sql = "SELECT 1
|
|
|
749 |
FROM {role_assignments}
|
|
|
750 |
WHERE userid = :userid AND roleid IN ($CFG->coursecontact)";
|
|
|
751 |
return $DB->record_exists_sql($sql, array('userid'=>$userid));
|
|
|
752 |
}
|
|
|
753 |
|
|
|
754 |
/**
|
|
|
755 |
* Does the user have a capability to do something?
|
|
|
756 |
*
|
|
|
757 |
* Walk the accessdata array and return true/false.
|
|
|
758 |
* Deals with prohibits, role switching, aggregating
|
|
|
759 |
* capabilities, etc.
|
|
|
760 |
*
|
|
|
761 |
* The main feature of here is being FAST and with no
|
|
|
762 |
* side effects.
|
|
|
763 |
*
|
|
|
764 |
* Notes:
|
|
|
765 |
*
|
|
|
766 |
* Switch Role merges with default role
|
|
|
767 |
* ------------------------------------
|
|
|
768 |
* If you are a teacher in course X, you have at least
|
|
|
769 |
* teacher-in-X + defaultloggedinuser-sitewide. So in the
|
|
|
770 |
* course you'll have techer+defaultloggedinuser.
|
|
|
771 |
* We try to mimic that in switchrole.
|
|
|
772 |
*
|
|
|
773 |
* Permission evaluation
|
|
|
774 |
* ---------------------
|
|
|
775 |
* Originally there was an extremely complicated way
|
|
|
776 |
* to determine the user access that dealt with
|
|
|
777 |
* "locality" or role assignments and role overrides.
|
|
|
778 |
* Now we simply evaluate access for each role separately
|
|
|
779 |
* and then verify if user has at least one role with allow
|
|
|
780 |
* and at the same time no role with prohibit.
|
|
|
781 |
*
|
|
|
782 |
* @access private
|
|
|
783 |
* @param string $capability
|
|
|
784 |
* @param context $context
|
|
|
785 |
* @param array $accessdata
|
|
|
786 |
* @return bool
|
|
|
787 |
*/
|
|
|
788 |
function has_capability_in_accessdata($capability, context $context, array &$accessdata) {
|
|
|
789 |
global $CFG;
|
|
|
790 |
|
|
|
791 |
// Build $paths as a list of current + all parent "paths" with order bottom-to-top
|
|
|
792 |
$path = $context->path;
|
|
|
793 |
$paths = array($path);
|
|
|
794 |
while ($path = rtrim($path, '0123456789')) {
|
|
|
795 |
$path = rtrim($path, '/');
|
|
|
796 |
if ($path === '') {
|
|
|
797 |
break;
|
|
|
798 |
}
|
|
|
799 |
$paths[] = $path;
|
|
|
800 |
}
|
|
|
801 |
|
|
|
802 |
$roles = array();
|
|
|
803 |
$switchedrole = false;
|
|
|
804 |
|
|
|
805 |
// Find out if role switched
|
|
|
806 |
if (!empty($accessdata['rsw'])) {
|
|
|
807 |
// From the bottom up...
|
|
|
808 |
foreach ($paths as $path) {
|
|
|
809 |
if (isset($accessdata['rsw'][$path])) {
|
|
|
810 |
// Found a switchrole assignment - check for that role _plus_ the default user role
|
|
|
811 |
$roles = array($accessdata['rsw'][$path]=>null, $CFG->defaultuserroleid=>null);
|
|
|
812 |
$switchedrole = true;
|
|
|
813 |
break;
|
|
|
814 |
}
|
|
|
815 |
}
|
|
|
816 |
}
|
|
|
817 |
|
|
|
818 |
if (!$switchedrole) {
|
|
|
819 |
// get all users roles in this context and above
|
|
|
820 |
foreach ($paths as $path) {
|
|
|
821 |
if (isset($accessdata['ra'][$path])) {
|
|
|
822 |
foreach ($accessdata['ra'][$path] as $roleid) {
|
|
|
823 |
$roles[$roleid] = null;
|
|
|
824 |
}
|
|
|
825 |
}
|
|
|
826 |
}
|
|
|
827 |
}
|
|
|
828 |
|
|
|
829 |
// Now find out what access is given to each role, going bottom-->up direction
|
|
|
830 |
$rdefs = get_role_definitions(array_keys($roles));
|
|
|
831 |
$allowed = false;
|
|
|
832 |
|
|
|
833 |
foreach ($roles as $roleid => $ignored) {
|
|
|
834 |
foreach ($paths as $path) {
|
|
|
835 |
if (isset($rdefs[$roleid][$path][$capability])) {
|
|
|
836 |
$perm = (int)$rdefs[$roleid][$path][$capability];
|
|
|
837 |
if ($perm === CAP_PROHIBIT) {
|
|
|
838 |
// any CAP_PROHIBIT found means no permission for the user
|
|
|
839 |
return false;
|
|
|
840 |
}
|
|
|
841 |
if (is_null($roles[$roleid])) {
|
|
|
842 |
$roles[$roleid] = $perm;
|
|
|
843 |
}
|
|
|
844 |
}
|
|
|
845 |
}
|
|
|
846 |
// CAP_ALLOW in any role means the user has a permission, we continue only to detect prohibits
|
|
|
847 |
$allowed = ($allowed or $roles[$roleid] === CAP_ALLOW);
|
|
|
848 |
}
|
|
|
849 |
|
|
|
850 |
return $allowed;
|
|
|
851 |
}
|
|
|
852 |
|
|
|
853 |
/**
|
|
|
854 |
* A convenience function that tests has_capability, and displays an error if
|
|
|
855 |
* the user does not have that capability.
|
|
|
856 |
*
|
|
|
857 |
* NOTE before Moodle 2.0, this function attempted to make an appropriate
|
|
|
858 |
* require_login call before checking the capability. This is no longer the case.
|
|
|
859 |
* You must call require_login (or one of its variants) if you want to check the
|
|
|
860 |
* user is logged in, before you call this function.
|
|
|
861 |
*
|
|
|
862 |
* @see has_capability()
|
|
|
863 |
*
|
|
|
864 |
* @param string $capability the name of the capability to check. For example mod/forum:view
|
|
|
865 |
* @param context $context the context to check the capability in. You normally get this with context_xxxx::instance().
|
|
|
866 |
* @param int $userid A user id. By default (null) checks the permissions of the current user.
|
|
|
867 |
* @param bool $doanything If false, ignore effect of admin role assignment
|
|
|
868 |
* @param string $errormessage The error string to to user. Defaults to 'nopermissions'.
|
|
|
869 |
* @param string $stringfile The language file to load the error string from. Defaults to 'error'.
|
|
|
870 |
* @return void terminates with an error if the user does not have the given capability.
|
|
|
871 |
*/
|
|
|
872 |
function require_capability($capability, context $context, $userid = null, $doanything = true,
|
|
|
873 |
$errormessage = 'nopermissions', $stringfile = '') {
|
|
|
874 |
if (!has_capability($capability, $context, $userid, $doanything)) {
|
|
|
875 |
throw new required_capability_exception($context, $capability, $errormessage, $stringfile);
|
|
|
876 |
}
|
|
|
877 |
}
|
|
|
878 |
|
|
|
879 |
/**
|
|
|
880 |
* A convenience function that tests has_capability for a list of capabilities, and displays an error if
|
|
|
881 |
* the user does not have that capability.
|
|
|
882 |
*
|
|
|
883 |
* This is just a utility method that calls has_capability in a loop. Try to put
|
|
|
884 |
* the capabilities that fewest users are likely to have first in the list for best
|
|
|
885 |
* performance.
|
|
|
886 |
*
|
|
|
887 |
* @category access
|
|
|
888 |
* @see has_capability()
|
|
|
889 |
*
|
|
|
890 |
* @param array $capabilities an array of capability names.
|
|
|
891 |
* @param context $context the context to check the capability in. You normally get this with context_xxxx::instance().
|
|
|
892 |
* @param int $userid A user id. By default (null) checks the permissions of the current user.
|
|
|
893 |
* @param bool $doanything If false, ignore effect of admin role assignment
|
|
|
894 |
* @param string $errormessage The error string to to user. Defaults to 'nopermissions'.
|
|
|
895 |
* @param string $stringfile The language file to load the error string from. Defaults to 'error'.
|
|
|
896 |
* @return void terminates with an error if the user does not have the given capability.
|
|
|
897 |
*/
|
|
|
898 |
function require_all_capabilities(array $capabilities, context $context, $userid = null, $doanything = true,
|
|
|
899 |
$errormessage = 'nopermissions', $stringfile = ''): void {
|
|
|
900 |
foreach ($capabilities as $capability) {
|
|
|
901 |
if (!has_capability($capability, $context, $userid, $doanything)) {
|
|
|
902 |
throw new required_capability_exception($context, $capability, $errormessage, $stringfile);
|
|
|
903 |
}
|
|
|
904 |
}
|
|
|
905 |
}
|
|
|
906 |
|
|
|
907 |
/**
|
|
|
908 |
* Return a nested array showing all role assignments for the user.
|
|
|
909 |
* [ra] => [contextpath][roleid] = roleid
|
|
|
910 |
*
|
|
|
911 |
* @access private
|
|
|
912 |
* @param int $userid - the id of the user
|
|
|
913 |
* @return array access info array
|
|
|
914 |
*/
|
|
|
915 |
function get_user_roles_sitewide_accessdata($userid) {
|
|
|
916 |
global $CFG, $DB;
|
|
|
917 |
|
|
|
918 |
$accessdata = get_empty_accessdata();
|
|
|
919 |
|
|
|
920 |
// start with the default role
|
|
|
921 |
if (!empty($CFG->defaultuserroleid)) {
|
|
|
922 |
$syscontext = context_system::instance();
|
|
|
923 |
$accessdata['ra'][$syscontext->path][(int)$CFG->defaultuserroleid] = (int)$CFG->defaultuserroleid;
|
|
|
924 |
}
|
|
|
925 |
|
|
|
926 |
// load the "default frontpage role"
|
|
|
927 |
if (!empty($CFG->defaultfrontpageroleid)) {
|
|
|
928 |
$frontpagecontext = context_course::instance(get_site()->id);
|
|
|
929 |
if ($frontpagecontext->path) {
|
|
|
930 |
$accessdata['ra'][$frontpagecontext->path][(int)$CFG->defaultfrontpageroleid] = (int)$CFG->defaultfrontpageroleid;
|
|
|
931 |
}
|
|
|
932 |
}
|
|
|
933 |
|
|
|
934 |
// Preload every assigned role.
|
|
|
935 |
$sql = "SELECT ctx.path, ra.roleid, ra.contextid
|
|
|
936 |
FROM {role_assignments} ra
|
|
|
937 |
JOIN {context} ctx ON ctx.id = ra.contextid
|
|
|
938 |
WHERE ra.userid = :userid";
|
|
|
939 |
|
|
|
940 |
$rs = $DB->get_recordset_sql($sql, array('userid' => $userid));
|
|
|
941 |
|
|
|
942 |
foreach ($rs as $ra) {
|
|
|
943 |
// RAs leafs are arrays to support multi-role assignments...
|
|
|
944 |
$accessdata['ra'][$ra->path][(int)$ra->roleid] = (int)$ra->roleid;
|
|
|
945 |
}
|
|
|
946 |
|
|
|
947 |
$rs->close();
|
|
|
948 |
|
|
|
949 |
return $accessdata;
|
|
|
950 |
}
|
|
|
951 |
|
|
|
952 |
/**
|
|
|
953 |
* Returns empty accessdata structure.
|
|
|
954 |
*
|
|
|
955 |
* @access private
|
|
|
956 |
* @return array empt accessdata
|
|
|
957 |
*/
|
|
|
958 |
function get_empty_accessdata() {
|
|
|
959 |
$accessdata = array(); // named list
|
|
|
960 |
$accessdata['ra'] = array();
|
|
|
961 |
$accessdata['time'] = time();
|
|
|
962 |
$accessdata['rsw'] = array();
|
|
|
963 |
|
|
|
964 |
return $accessdata;
|
|
|
965 |
}
|
|
|
966 |
|
|
|
967 |
/**
|
|
|
968 |
* Get accessdata for a given user.
|
|
|
969 |
*
|
|
|
970 |
* @access private
|
|
|
971 |
* @param int $userid
|
|
|
972 |
* @param bool $preloadonly true means do not return access array
|
|
|
973 |
* @return ?array accessdata
|
|
|
974 |
*/
|
|
|
975 |
function get_user_accessdata($userid, $preloadonly=false) {
|
|
|
976 |
global $CFG, $ACCESSLIB_PRIVATE, $USER;
|
|
|
977 |
|
|
|
978 |
if (isset($USER->access)) {
|
|
|
979 |
$ACCESSLIB_PRIVATE->accessdatabyuser[$USER->id] = $USER->access;
|
|
|
980 |
}
|
|
|
981 |
|
| 11 |
efrain |
982 |
// Unfortunately, we can't use the $ACCESSLIB_PRIVATE->dirtyusers array because it is not available in CLI.
|
|
|
983 |
// So we need to check if the user has been marked as dirty or not in the cache directly.
|
|
|
984 |
// This will add additional queries to the database, but it is the best we can do.
|
|
|
985 |
if (CLI_SCRIPT && !empty($ACCESSLIB_PRIVATE->accessdatabyuser[$userid])) {
|
|
|
986 |
if (get_cache_flag('accesslib/dirtyusers', $userid, $ACCESSLIB_PRIVATE->accessdatabyuser[$userid]['time'])) {
|
|
|
987 |
unset($ACCESSLIB_PRIVATE->accessdatabyuser[$userid]);
|
|
|
988 |
}
|
|
|
989 |
}
|
|
|
990 |
|
| 1 |
efrain |
991 |
if (!isset($ACCESSLIB_PRIVATE->accessdatabyuser[$userid])) {
|
|
|
992 |
if (empty($userid)) {
|
|
|
993 |
if (!empty($CFG->notloggedinroleid)) {
|
|
|
994 |
$accessdata = get_role_access($CFG->notloggedinroleid);
|
|
|
995 |
} else {
|
|
|
996 |
// weird
|
|
|
997 |
return get_empty_accessdata();
|
|
|
998 |
}
|
|
|
999 |
|
|
|
1000 |
} else if (isguestuser($userid)) {
|
|
|
1001 |
if ($guestrole = get_guest_role()) {
|
|
|
1002 |
$accessdata = get_role_access($guestrole->id);
|
|
|
1003 |
} else {
|
|
|
1004 |
//weird
|
|
|
1005 |
return get_empty_accessdata();
|
|
|
1006 |
}
|
|
|
1007 |
|
|
|
1008 |
} else {
|
|
|
1009 |
// Includes default role and frontpage role.
|
|
|
1010 |
$accessdata = get_user_roles_sitewide_accessdata($userid);
|
|
|
1011 |
}
|
|
|
1012 |
|
|
|
1013 |
$ACCESSLIB_PRIVATE->accessdatabyuser[$userid] = $accessdata;
|
|
|
1014 |
}
|
|
|
1015 |
|
|
|
1016 |
if ($preloadonly) {
|
|
|
1017 |
return;
|
|
|
1018 |
} else {
|
|
|
1019 |
return $ACCESSLIB_PRIVATE->accessdatabyuser[$userid];
|
|
|
1020 |
}
|
|
|
1021 |
}
|
|
|
1022 |
|
|
|
1023 |
/**
|
|
|
1024 |
* A convenience function to completely load all the capabilities
|
|
|
1025 |
* for the current user. It is called from has_capability() and functions change permissions.
|
|
|
1026 |
*
|
|
|
1027 |
* Call it only _after_ you've setup $USER and called check_enrolment_plugins();
|
|
|
1028 |
* @see check_enrolment_plugins()
|
|
|
1029 |
*
|
|
|
1030 |
* @access private
|
|
|
1031 |
* @return void
|
|
|
1032 |
*/
|
|
|
1033 |
function load_all_capabilities() {
|
|
|
1034 |
global $USER;
|
|
|
1035 |
|
|
|
1036 |
// roles not installed yet - we are in the middle of installation
|
|
|
1037 |
if (during_initial_install()) {
|
|
|
1038 |
return;
|
|
|
1039 |
}
|
|
|
1040 |
|
|
|
1041 |
if (!isset($USER->id)) {
|
|
|
1042 |
// this should not happen
|
|
|
1043 |
$USER->id = 0;
|
|
|
1044 |
}
|
|
|
1045 |
|
|
|
1046 |
unset($USER->access);
|
|
|
1047 |
$USER->access = get_user_accessdata($USER->id);
|
|
|
1048 |
|
|
|
1049 |
// Clear to force a refresh
|
|
|
1050 |
unset($USER->mycourses);
|
|
|
1051 |
|
|
|
1052 |
// init/reset internal enrol caches - active course enrolments and temp access
|
|
|
1053 |
$USER->enrol = array('enrolled'=>array(), 'tempguest'=>array());
|
|
|
1054 |
}
|
|
|
1055 |
|
|
|
1056 |
/**
|
|
|
1057 |
* A convenience function to completely reload all the capabilities
|
|
|
1058 |
* for the current user when roles have been updated in a relevant
|
|
|
1059 |
* context -- but PRESERVING switchroles and loginas.
|
|
|
1060 |
* This function resets all accesslib and context caches.
|
|
|
1061 |
*
|
|
|
1062 |
* That is - completely transparent to the user.
|
|
|
1063 |
*
|
|
|
1064 |
* Note: reloads $USER->access completely.
|
|
|
1065 |
*
|
|
|
1066 |
* @access private
|
|
|
1067 |
* @return void
|
|
|
1068 |
*/
|
|
|
1069 |
function reload_all_capabilities() {
|
|
|
1070 |
global $USER, $DB, $ACCESSLIB_PRIVATE;
|
|
|
1071 |
|
|
|
1072 |
// copy switchroles
|
|
|
1073 |
$sw = array();
|
|
|
1074 |
if (!empty($USER->access['rsw'])) {
|
|
|
1075 |
$sw = $USER->access['rsw'];
|
|
|
1076 |
}
|
|
|
1077 |
|
|
|
1078 |
accesslib_clear_all_caches(true);
|
|
|
1079 |
unset($USER->access);
|
|
|
1080 |
|
|
|
1081 |
// Prevent dirty flags refetching on this page.
|
|
|
1082 |
$ACCESSLIB_PRIVATE->dirtycontexts = array();
|
|
|
1083 |
$ACCESSLIB_PRIVATE->dirtyusers = array($USER->id => false);
|
|
|
1084 |
|
|
|
1085 |
load_all_capabilities();
|
|
|
1086 |
|
|
|
1087 |
foreach ($sw as $path => $roleid) {
|
|
|
1088 |
if ($record = $DB->get_record('context', array('path'=>$path))) {
|
|
|
1089 |
$context = context::instance_by_id($record->id);
|
|
|
1090 |
if (has_capability('moodle/role:switchroles', $context)) {
|
|
|
1091 |
role_switch($roleid, $context);
|
|
|
1092 |
}
|
|
|
1093 |
}
|
|
|
1094 |
}
|
|
|
1095 |
}
|
|
|
1096 |
|
|
|
1097 |
/**
|
|
|
1098 |
* Adds a temp role to current USER->access array.
|
|
|
1099 |
*
|
|
|
1100 |
* Useful for the "temporary guest" access we grant to logged-in users.
|
|
|
1101 |
* This is useful for enrol plugins only.
|
|
|
1102 |
*
|
|
|
1103 |
* @since Moodle 2.2
|
|
|
1104 |
* @param context_course $coursecontext
|
|
|
1105 |
* @param int $roleid
|
|
|
1106 |
* @return void
|
|
|
1107 |
*/
|
|
|
1108 |
function load_temp_course_role(context_course $coursecontext, $roleid) {
|
|
|
1109 |
global $USER, $SITE;
|
|
|
1110 |
|
|
|
1111 |
if (empty($roleid)) {
|
|
|
1112 |
debugging('invalid role specified in load_temp_course_role()');
|
|
|
1113 |
return;
|
|
|
1114 |
}
|
|
|
1115 |
|
|
|
1116 |
if ($coursecontext->instanceid == $SITE->id) {
|
|
|
1117 |
debugging('Can not use temp roles on the frontpage');
|
|
|
1118 |
return;
|
|
|
1119 |
}
|
|
|
1120 |
|
|
|
1121 |
if (!isset($USER->access)) {
|
|
|
1122 |
load_all_capabilities();
|
|
|
1123 |
}
|
|
|
1124 |
|
|
|
1125 |
$coursecontext->reload_if_dirty();
|
|
|
1126 |
|
|
|
1127 |
if (isset($USER->access['ra'][$coursecontext->path][$roleid])) {
|
|
|
1128 |
return;
|
|
|
1129 |
}
|
|
|
1130 |
|
|
|
1131 |
$USER->access['ra'][$coursecontext->path][(int)$roleid] = (int)$roleid;
|
|
|
1132 |
}
|
|
|
1133 |
|
|
|
1134 |
/**
|
|
|
1135 |
* Removes any extra guest roles from current USER->access array.
|
|
|
1136 |
* This is useful for enrol plugins only.
|
|
|
1137 |
*
|
|
|
1138 |
* @since Moodle 2.2
|
|
|
1139 |
* @param context_course $coursecontext
|
|
|
1140 |
* @return void
|
|
|
1141 |
*/
|
|
|
1142 |
function remove_temp_course_roles(context_course $coursecontext) {
|
|
|
1143 |
global $DB, $USER, $SITE;
|
|
|
1144 |
|
|
|
1145 |
if ($coursecontext->instanceid == $SITE->id) {
|
|
|
1146 |
debugging('Can not use temp roles on the frontpage');
|
|
|
1147 |
return;
|
|
|
1148 |
}
|
|
|
1149 |
|
|
|
1150 |
if (empty($USER->access['ra'][$coursecontext->path])) {
|
|
|
1151 |
//no roles here, weird
|
|
|
1152 |
return;
|
|
|
1153 |
}
|
|
|
1154 |
|
|
|
1155 |
$sql = "SELECT DISTINCT ra.roleid AS id
|
|
|
1156 |
FROM {role_assignments} ra
|
|
|
1157 |
WHERE ra.contextid = :contextid AND ra.userid = :userid";
|
|
|
1158 |
$ras = $DB->get_records_sql($sql, array('contextid'=>$coursecontext->id, 'userid'=>$USER->id));
|
|
|
1159 |
|
|
|
1160 |
$USER->access['ra'][$coursecontext->path] = array();
|
|
|
1161 |
foreach ($ras as $r) {
|
|
|
1162 |
$USER->access['ra'][$coursecontext->path][(int)$r->id] = (int)$r->id;
|
|
|
1163 |
}
|
|
|
1164 |
}
|
|
|
1165 |
|
|
|
1166 |
/**
|
|
|
1167 |
* Returns array of all role archetypes.
|
|
|
1168 |
*
|
|
|
1169 |
* @return array
|
|
|
1170 |
*/
|
|
|
1171 |
function get_role_archetypes() {
|
|
|
1172 |
return array(
|
|
|
1173 |
'manager' => 'manager',
|
|
|
1174 |
'coursecreator' => 'coursecreator',
|
|
|
1175 |
'editingteacher' => 'editingteacher',
|
|
|
1176 |
'teacher' => 'teacher',
|
|
|
1177 |
'student' => 'student',
|
|
|
1178 |
'guest' => 'guest',
|
|
|
1179 |
'user' => 'user',
|
|
|
1180 |
'frontpage' => 'frontpage'
|
|
|
1181 |
);
|
|
|
1182 |
}
|
|
|
1183 |
|
|
|
1184 |
/**
|
|
|
1185 |
* Assign the defaults found in this capability definition to roles that have
|
|
|
1186 |
* the corresponding legacy capabilities assigned to them.
|
|
|
1187 |
*
|
|
|
1188 |
* @param string $capability
|
|
|
1189 |
* @param array $legacyperms an array in the format (example):
|
|
|
1190 |
* 'guest' => CAP_PREVENT,
|
|
|
1191 |
* 'student' => CAP_ALLOW,
|
|
|
1192 |
* 'teacher' => CAP_ALLOW,
|
|
|
1193 |
* 'editingteacher' => CAP_ALLOW,
|
|
|
1194 |
* 'coursecreator' => CAP_ALLOW,
|
|
|
1195 |
* 'manager' => CAP_ALLOW
|
|
|
1196 |
* @return boolean success or failure.
|
|
|
1197 |
*/
|
|
|
1198 |
function assign_legacy_capabilities($capability, $legacyperms) {
|
|
|
1199 |
|
|
|
1200 |
$archetypes = get_role_archetypes();
|
|
|
1201 |
|
|
|
1202 |
foreach ($legacyperms as $type => $perm) {
|
|
|
1203 |
|
|
|
1204 |
$systemcontext = context_system::instance();
|
|
|
1205 |
if ($type === 'admin') {
|
|
|
1206 |
debugging('Legacy type admin in access.php was renamed to manager, please update the code.');
|
|
|
1207 |
$type = 'manager';
|
|
|
1208 |
}
|
|
|
1209 |
|
|
|
1210 |
if (!array_key_exists($type, $archetypes)) {
|
|
|
1211 |
throw new \moodle_exception('invalidlegacy', '', '', $type);
|
|
|
1212 |
}
|
|
|
1213 |
|
|
|
1214 |
if ($roles = get_archetype_roles($type)) {
|
|
|
1215 |
foreach ($roles as $role) {
|
|
|
1216 |
// Assign a site level capability.
|
|
|
1217 |
if (!assign_capability($capability, $perm, $role->id, $systemcontext->id)) {
|
|
|
1218 |
return false;
|
|
|
1219 |
}
|
|
|
1220 |
}
|
|
|
1221 |
}
|
|
|
1222 |
}
|
|
|
1223 |
return true;
|
|
|
1224 |
}
|
|
|
1225 |
|
|
|
1226 |
/**
|
|
|
1227 |
* Verify capability risks.
|
|
|
1228 |
*
|
|
|
1229 |
* @param stdClass $capability a capability - a row from the capabilities table.
|
|
|
1230 |
* @return boolean whether this capability is safe - that is, whether people with the
|
|
|
1231 |
* safeoverrides capability should be allowed to change it.
|
|
|
1232 |
*/
|
|
|
1233 |
function is_safe_capability($capability) {
|
|
|
1234 |
return !((RISK_DATALOSS | RISK_MANAGETRUST | RISK_CONFIG | RISK_XSS | RISK_PERSONAL) & $capability->riskbitmask);
|
|
|
1235 |
}
|
|
|
1236 |
|
|
|
1237 |
/**
|
|
|
1238 |
* Get the local override (if any) for a given capability in a role in a context
|
|
|
1239 |
*
|
|
|
1240 |
* @param int $roleid
|
|
|
1241 |
* @param int $contextid
|
|
|
1242 |
* @param string $capability
|
|
|
1243 |
* @return stdClass local capability override
|
|
|
1244 |
*/
|
|
|
1245 |
function get_local_override($roleid, $contextid, $capability) {
|
|
|
1246 |
global $DB;
|
|
|
1247 |
|
|
|
1248 |
return $DB->get_record_sql("
|
|
|
1249 |
SELECT rc.*
|
|
|
1250 |
FROM {role_capabilities} rc
|
|
|
1251 |
JOIN {capability} cap ON rc.capability = cap.name
|
|
|
1252 |
WHERE rc.roleid = :roleid AND rc.capability = :capability AND rc.contextid = :contextid", [
|
|
|
1253 |
'roleid' => $roleid,
|
|
|
1254 |
'contextid' => $contextid,
|
|
|
1255 |
'capability' => $capability,
|
|
|
1256 |
|
|
|
1257 |
]);
|
|
|
1258 |
}
|
|
|
1259 |
|
|
|
1260 |
/**
|
|
|
1261 |
* Returns context instance plus related course and cm instances
|
|
|
1262 |
*
|
|
|
1263 |
* @param int $contextid
|
|
|
1264 |
* @return array of ($context, $course, $cm)
|
|
|
1265 |
*/
|
|
|
1266 |
function get_context_info_array($contextid) {
|
|
|
1267 |
global $DB;
|
|
|
1268 |
|
|
|
1269 |
$context = context::instance_by_id($contextid, MUST_EXIST);
|
|
|
1270 |
$course = null;
|
|
|
1271 |
$cm = null;
|
|
|
1272 |
|
|
|
1273 |
if ($context->contextlevel == CONTEXT_COURSE) {
|
|
|
1274 |
$course = $DB->get_record('course', array('id'=>$context->instanceid), '*', MUST_EXIST);
|
|
|
1275 |
|
|
|
1276 |
} else if ($context->contextlevel == CONTEXT_MODULE) {
|
|
|
1277 |
$cm = get_coursemodule_from_id('', $context->instanceid, 0, false, MUST_EXIST);
|
|
|
1278 |
$course = $DB->get_record('course', array('id'=>$cm->course), '*', MUST_EXIST);
|
|
|
1279 |
|
|
|
1280 |
} else if ($context->contextlevel == CONTEXT_BLOCK) {
|
|
|
1281 |
$parent = $context->get_parent_context();
|
|
|
1282 |
|
|
|
1283 |
if ($parent->contextlevel == CONTEXT_COURSE) {
|
|
|
1284 |
$course = $DB->get_record('course', array('id'=>$parent->instanceid), '*', MUST_EXIST);
|
|
|
1285 |
} else if ($parent->contextlevel == CONTEXT_MODULE) {
|
|
|
1286 |
$cm = get_coursemodule_from_id('', $parent->instanceid, 0, false, MUST_EXIST);
|
|
|
1287 |
$course = $DB->get_record('course', array('id'=>$cm->course), '*', MUST_EXIST);
|
|
|
1288 |
}
|
|
|
1289 |
}
|
|
|
1290 |
|
|
|
1291 |
return array($context, $course, $cm);
|
|
|
1292 |
}
|
|
|
1293 |
|
|
|
1294 |
/**
|
|
|
1295 |
* Function that creates a role
|
|
|
1296 |
*
|
|
|
1297 |
* @param string $name role name
|
|
|
1298 |
* @param string $shortname role short name
|
|
|
1299 |
* @param string $description role description
|
|
|
1300 |
* @param string $archetype
|
|
|
1301 |
* @return int id or dml_exception
|
|
|
1302 |
*/
|
|
|
1303 |
function create_role($name, $shortname, $description, $archetype = '') {
|
|
|
1304 |
global $DB;
|
|
|
1305 |
|
|
|
1306 |
if (strpos($archetype, 'moodle/legacy:') !== false) {
|
|
|
1307 |
throw new coding_exception('Use new role archetype parameter in create_role() instead of old legacy capabilities.');
|
|
|
1308 |
}
|
|
|
1309 |
|
|
|
1310 |
// verify role archetype actually exists
|
|
|
1311 |
$archetypes = get_role_archetypes();
|
|
|
1312 |
if (empty($archetypes[$archetype])) {
|
|
|
1313 |
$archetype = '';
|
|
|
1314 |
}
|
|
|
1315 |
|
|
|
1316 |
// Insert the role record.
|
|
|
1317 |
$role = new stdClass();
|
|
|
1318 |
$role->name = $name;
|
|
|
1319 |
$role->shortname = $shortname;
|
|
|
1320 |
$role->description = $description;
|
|
|
1321 |
$role->archetype = $archetype;
|
|
|
1322 |
|
|
|
1323 |
//find free sortorder number
|
|
|
1324 |
$role->sortorder = $DB->get_field('role', 'MAX(sortorder) + 1', array());
|
|
|
1325 |
if (empty($role->sortorder)) {
|
|
|
1326 |
$role->sortorder = 1;
|
|
|
1327 |
}
|
|
|
1328 |
$role->id = $DB->insert_record('role', $role);
|
|
|
1329 |
$event = \core\event\role_created::create([
|
|
|
1330 |
'objectid' => $role->id,
|
|
|
1331 |
'context' => context_system::instance(),
|
|
|
1332 |
'other' => [
|
|
|
1333 |
'name' => $role->name,
|
|
|
1334 |
'shortname' => $role->shortname,
|
|
|
1335 |
'archetype' => $role->archetype,
|
|
|
1336 |
]
|
|
|
1337 |
]);
|
|
|
1338 |
|
|
|
1339 |
$event->add_record_snapshot('role', $role);
|
|
|
1340 |
$event->trigger();
|
|
|
1341 |
|
|
|
1342 |
return $role->id;
|
|
|
1343 |
}
|
|
|
1344 |
|
|
|
1345 |
/**
|
|
|
1346 |
* Function that deletes a role and cleanups up after it
|
|
|
1347 |
*
|
|
|
1348 |
* @param int $roleid id of role to delete
|
|
|
1349 |
* @return bool always true
|
|
|
1350 |
*/
|
|
|
1351 |
function delete_role($roleid) {
|
|
|
1352 |
global $DB;
|
|
|
1353 |
|
|
|
1354 |
// first unssign all users
|
|
|
1355 |
role_unassign_all(array('roleid'=>$roleid));
|
|
|
1356 |
|
|
|
1357 |
// cleanup all references to this role, ignore errors
|
|
|
1358 |
$DB->delete_records('role_capabilities', array('roleid'=>$roleid));
|
|
|
1359 |
$DB->delete_records('role_allow_assign', array('roleid'=>$roleid));
|
|
|
1360 |
$DB->delete_records('role_allow_assign', array('allowassign'=>$roleid));
|
|
|
1361 |
$DB->delete_records('role_allow_override', array('roleid'=>$roleid));
|
|
|
1362 |
$DB->delete_records('role_allow_override', array('allowoverride'=>$roleid));
|
|
|
1363 |
$DB->delete_records('role_names', array('roleid'=>$roleid));
|
|
|
1364 |
$DB->delete_records('role_context_levels', array('roleid'=>$roleid));
|
|
|
1365 |
|
|
|
1366 |
// Get role record before it's deleted.
|
|
|
1367 |
$role = $DB->get_record('role', array('id'=>$roleid));
|
|
|
1368 |
|
|
|
1369 |
// Finally delete the role itself.
|
|
|
1370 |
$DB->delete_records('role', array('id'=>$roleid));
|
|
|
1371 |
|
|
|
1372 |
// Trigger event.
|
|
|
1373 |
$event = \core\event\role_deleted::create(
|
|
|
1374 |
array(
|
|
|
1375 |
'context' => context_system::instance(),
|
|
|
1376 |
'objectid' => $roleid,
|
|
|
1377 |
'other' =>
|
|
|
1378 |
array(
|
|
|
1379 |
'shortname' => $role->shortname,
|
|
|
1380 |
'description' => $role->description,
|
|
|
1381 |
'archetype' => $role->archetype
|
|
|
1382 |
)
|
|
|
1383 |
)
|
|
|
1384 |
);
|
|
|
1385 |
$event->add_record_snapshot('role', $role);
|
|
|
1386 |
$event->trigger();
|
|
|
1387 |
|
|
|
1388 |
// Reset any cache of this role, including MUC.
|
|
|
1389 |
accesslib_clear_role_cache($roleid);
|
|
|
1390 |
|
|
|
1391 |
return true;
|
|
|
1392 |
}
|
|
|
1393 |
|
|
|
1394 |
/**
|
|
|
1395 |
* Function to write context specific overrides, or default capabilities.
|
|
|
1396 |
*
|
|
|
1397 |
* The $performancehints array can currently contain two values intended to make this faster when
|
|
|
1398 |
* this function is being called in a loop, if you have already checked certain details:
|
|
|
1399 |
* 'contextexists' - if we already know the contextid exists in context table
|
|
|
1400 |
* ASSIGN_HINT_NO_EXISTING - if we already know there is no entry in role_capabilities matching
|
|
|
1401 |
* contextid, roleid, and capability
|
|
|
1402 |
*
|
|
|
1403 |
* @param string $capability string name
|
|
|
1404 |
* @param int $permission CAP_ constants
|
|
|
1405 |
* @param int $roleid role id
|
|
|
1406 |
* @param int|context $contextid context id
|
|
|
1407 |
* @param bool $overwrite
|
|
|
1408 |
* @param string[] $performancehints Performance hints - leave blank unless needed
|
|
|
1409 |
* @return bool always true or exception
|
|
|
1410 |
*/
|
|
|
1411 |
function assign_capability($capability, $permission, $roleid, $contextid, $overwrite = false, array $performancehints = []) {
|
|
|
1412 |
global $USER, $DB;
|
|
|
1413 |
|
|
|
1414 |
if ($contextid instanceof context) {
|
|
|
1415 |
$context = $contextid;
|
|
|
1416 |
} else {
|
|
|
1417 |
$context = context::instance_by_id($contextid);
|
|
|
1418 |
}
|
|
|
1419 |
|
|
|
1420 |
// Capability must exist.
|
|
|
1421 |
if (!$capinfo = get_capability_info($capability)) {
|
|
|
1422 |
throw new coding_exception("Capability '{$capability}' was not found! This has to be fixed in code.");
|
|
|
1423 |
}
|
|
|
1424 |
|
|
|
1425 |
if (empty($permission) || $permission == CAP_INHERIT) { // if permission is not set
|
|
|
1426 |
unassign_capability($capability, $roleid, $context->id);
|
|
|
1427 |
return true;
|
|
|
1428 |
}
|
|
|
1429 |
|
|
|
1430 |
if (in_array(ACCESSLIB_HINT_NO_EXISTING, $performancehints)) {
|
|
|
1431 |
$existing = false;
|
|
|
1432 |
} else {
|
|
|
1433 |
$existing = $DB->get_record('role_capabilities',
|
|
|
1434 |
['contextid' => $context->id, 'roleid' => $roleid, 'capability' => $capability]);
|
|
|
1435 |
}
|
|
|
1436 |
|
|
|
1437 |
if ($existing and !$overwrite) { // We want to keep whatever is there already
|
|
|
1438 |
return true;
|
|
|
1439 |
}
|
|
|
1440 |
|
|
|
1441 |
$cap = new stdClass();
|
|
|
1442 |
$cap->contextid = $context->id;
|
|
|
1443 |
$cap->roleid = $roleid;
|
|
|
1444 |
$cap->capability = $capability;
|
|
|
1445 |
$cap->permission = $permission;
|
|
|
1446 |
$cap->timemodified = time();
|
|
|
1447 |
$cap->modifierid = empty($USER->id) ? 0 : $USER->id;
|
|
|
1448 |
|
|
|
1449 |
if ($existing) {
|
|
|
1450 |
$cap->id = $existing->id;
|
|
|
1451 |
$DB->update_record('role_capabilities', $cap);
|
|
|
1452 |
} else {
|
|
|
1453 |
if (in_array(ACCESSLIB_HINT_CONTEXT_EXISTS, $performancehints) ||
|
|
|
1454 |
$DB->record_exists('context', ['id' => $context->id])) {
|
|
|
1455 |
$DB->insert_record('role_capabilities', $cap);
|
|
|
1456 |
}
|
|
|
1457 |
}
|
|
|
1458 |
|
|
|
1459 |
// Trigger capability_assigned event.
|
|
|
1460 |
\core\event\capability_assigned::create([
|
|
|
1461 |
'userid' => $cap->modifierid,
|
|
|
1462 |
'context' => $context,
|
|
|
1463 |
'objectid' => $roleid,
|
|
|
1464 |
'other' => [
|
|
|
1465 |
'capability' => $capability,
|
|
|
1466 |
'oldpermission' => $existing->permission ?? CAP_INHERIT,
|
|
|
1467 |
'permission' => $permission
|
|
|
1468 |
]
|
|
|
1469 |
])->trigger();
|
|
|
1470 |
|
|
|
1471 |
// Reset any cache of this role, including MUC.
|
|
|
1472 |
accesslib_clear_role_cache($roleid);
|
|
|
1473 |
|
|
|
1474 |
return true;
|
|
|
1475 |
}
|
|
|
1476 |
|
|
|
1477 |
/**
|
|
|
1478 |
* Unassign a capability from a role.
|
|
|
1479 |
*
|
|
|
1480 |
* @param string $capability the name of the capability
|
|
|
1481 |
* @param int $roleid the role id
|
|
|
1482 |
* @param int|context $contextid null means all contexts
|
| 1441 |
ariadna |
1483 |
* @param bool $showdebug if true, will show debugging messages
|
| 1 |
efrain |
1484 |
* @return boolean true or exception
|
|
|
1485 |
*/
|
| 1441 |
ariadna |
1486 |
function unassign_capability($capability, $roleid, $contextid = null, bool $showdebug = true) {
|
| 1 |
efrain |
1487 |
global $DB, $USER;
|
|
|
1488 |
|
|
|
1489 |
// Capability must exist.
|
| 1441 |
ariadna |
1490 |
if (!get_capability_info($capability, $showdebug)) {
|
| 1 |
efrain |
1491 |
throw new coding_exception("Capability '{$capability}' was not found! This has to be fixed in code.");
|
|
|
1492 |
}
|
|
|
1493 |
|
|
|
1494 |
if (!empty($contextid)) {
|
|
|
1495 |
if ($contextid instanceof context) {
|
|
|
1496 |
$context = $contextid;
|
|
|
1497 |
} else {
|
|
|
1498 |
$context = context::instance_by_id($contextid);
|
|
|
1499 |
}
|
|
|
1500 |
// delete from context rel, if this is the last override in this context
|
|
|
1501 |
$DB->delete_records('role_capabilities', array('capability'=>$capability, 'roleid'=>$roleid, 'contextid'=>$context->id));
|
|
|
1502 |
} else {
|
|
|
1503 |
$DB->delete_records('role_capabilities', array('capability'=>$capability, 'roleid'=>$roleid));
|
|
|
1504 |
}
|
|
|
1505 |
|
|
|
1506 |
// Trigger capability_assigned event.
|
|
|
1507 |
\core\event\capability_unassigned::create([
|
|
|
1508 |
'userid' => $USER->id,
|
|
|
1509 |
'context' => $context ?? context_system::instance(),
|
|
|
1510 |
'objectid' => $roleid,
|
|
|
1511 |
'other' => [
|
|
|
1512 |
'capability' => $capability,
|
|
|
1513 |
]
|
|
|
1514 |
])->trigger();
|
|
|
1515 |
|
|
|
1516 |
// Reset any cache of this role, including MUC.
|
|
|
1517 |
accesslib_clear_role_cache($roleid);
|
|
|
1518 |
|
|
|
1519 |
return true;
|
|
|
1520 |
}
|
|
|
1521 |
|
|
|
1522 |
/**
|
|
|
1523 |
* Get the roles that have a given capability assigned to it
|
|
|
1524 |
*
|
|
|
1525 |
* This function does not resolve the actual permission of the capability.
|
|
|
1526 |
* It just checks for permissions and overrides.
|
|
|
1527 |
* Use get_roles_with_cap_in_context() if resolution is required.
|
|
|
1528 |
*
|
|
|
1529 |
* @param string $capability capability name (string)
|
|
|
1530 |
* @param string $permission optional, the permission defined for this capability
|
|
|
1531 |
* either CAP_ALLOW, CAP_PREVENT or CAP_PROHIBIT. Defaults to null which means any.
|
|
|
1532 |
* @param context|null $context null means any
|
|
|
1533 |
* @return array of role records
|
|
|
1534 |
*/
|
|
|
1535 |
function get_roles_with_capability($capability, $permission = null, $context = null) {
|
|
|
1536 |
global $DB;
|
|
|
1537 |
|
|
|
1538 |
if ($context) {
|
|
|
1539 |
$contexts = $context->get_parent_context_ids(true);
|
|
|
1540 |
list($insql, $params) = $DB->get_in_or_equal($contexts, SQL_PARAMS_NAMED, 'ctx');
|
|
|
1541 |
$contextsql = "AND rc.contextid $insql";
|
|
|
1542 |
} else {
|
|
|
1543 |
$params = array();
|
|
|
1544 |
$contextsql = '';
|
|
|
1545 |
}
|
|
|
1546 |
|
|
|
1547 |
if ($permission) {
|
|
|
1548 |
$permissionsql = " AND rc.permission = :permission";
|
|
|
1549 |
$params['permission'] = $permission;
|
|
|
1550 |
} else {
|
|
|
1551 |
$permissionsql = '';
|
|
|
1552 |
}
|
|
|
1553 |
|
|
|
1554 |
$sql = "SELECT r.*
|
|
|
1555 |
FROM {role} r
|
|
|
1556 |
WHERE r.id IN (SELECT rc.roleid
|
|
|
1557 |
FROM {role_capabilities} rc
|
|
|
1558 |
JOIN {capabilities} cap ON rc.capability = cap.name
|
|
|
1559 |
WHERE rc.capability = :capname
|
|
|
1560 |
$contextsql
|
|
|
1561 |
$permissionsql)";
|
|
|
1562 |
$params['capname'] = $capability;
|
|
|
1563 |
|
|
|
1564 |
|
|
|
1565 |
return $DB->get_records_sql($sql, $params);
|
|
|
1566 |
}
|
|
|
1567 |
|
|
|
1568 |
/**
|
|
|
1569 |
* This function makes a role-assignment (a role for a user in a particular context)
|
|
|
1570 |
*
|
|
|
1571 |
* @param int $roleid the role of the id
|
|
|
1572 |
* @param int $userid userid
|
|
|
1573 |
* @param int|context $contextid id of the context
|
|
|
1574 |
* @param string $component example 'enrol_ldap', defaults to '' which means manual assignment,
|
|
|
1575 |
* @param int $itemid id of enrolment/auth plugin
|
|
|
1576 |
* @param string $timemodified defaults to current time
|
|
|
1577 |
* @return int new/existing id of the assignment
|
|
|
1578 |
*/
|
|
|
1579 |
function role_assign($roleid, $userid, $contextid, $component = '', $itemid = 0, $timemodified = '') {
|
|
|
1580 |
global $USER, $DB;
|
|
|
1581 |
|
|
|
1582 |
// first of all detect if somebody is using old style parameters
|
|
|
1583 |
if ($contextid === 0 or is_numeric($component)) {
|
|
|
1584 |
throw new coding_exception('Invalid call to role_assign(), code needs to be updated to use new order of parameters');
|
|
|
1585 |
}
|
|
|
1586 |
|
|
|
1587 |
// now validate all parameters
|
|
|
1588 |
if (empty($roleid)) {
|
|
|
1589 |
throw new coding_exception('Invalid call to role_assign(), roleid can not be empty');
|
|
|
1590 |
}
|
|
|
1591 |
|
|
|
1592 |
if (empty($userid)) {
|
|
|
1593 |
throw new coding_exception('Invalid call to role_assign(), userid can not be empty');
|
|
|
1594 |
}
|
|
|
1595 |
|
|
|
1596 |
if ($itemid) {
|
|
|
1597 |
if (strpos($component, '_') === false) {
|
|
|
1598 |
throw new coding_exception('Invalid call to role_assign(), component must start with plugin type such as"enrol_" when itemid specified', 'component:'.$component);
|
|
|
1599 |
}
|
|
|
1600 |
} else {
|
|
|
1601 |
$itemid = 0;
|
|
|
1602 |
if ($component !== '' and strpos($component, '_') === false) {
|
|
|
1603 |
throw new coding_exception('Invalid call to role_assign(), invalid component string', 'component:'.$component);
|
|
|
1604 |
}
|
|
|
1605 |
}
|
|
|
1606 |
|
|
|
1607 |
if (!$DB->record_exists('user', array('id'=>$userid, 'deleted'=>0))) {
|
|
|
1608 |
throw new coding_exception('User ID does not exist or is deleted!', 'userid:'.$userid);
|
|
|
1609 |
}
|
|
|
1610 |
|
|
|
1611 |
if ($contextid instanceof context) {
|
|
|
1612 |
$context = $contextid;
|
|
|
1613 |
} else {
|
|
|
1614 |
$context = context::instance_by_id($contextid, MUST_EXIST);
|
|
|
1615 |
}
|
|
|
1616 |
|
|
|
1617 |
if (!$timemodified) {
|
|
|
1618 |
$timemodified = time();
|
|
|
1619 |
}
|
|
|
1620 |
|
|
|
1621 |
// Check for existing entry
|
|
|
1622 |
$ras = $DB->get_records('role_assignments', array('roleid'=>$roleid, 'contextid'=>$context->id, 'userid'=>$userid, 'component'=>$component, 'itemid'=>$itemid), 'id');
|
|
|
1623 |
|
|
|
1624 |
if ($ras) {
|
|
|
1625 |
// role already assigned - this should not happen
|
|
|
1626 |
if (count($ras) > 1) {
|
|
|
1627 |
// very weird - remove all duplicates!
|
|
|
1628 |
$ra = array_shift($ras);
|
|
|
1629 |
foreach ($ras as $r) {
|
|
|
1630 |
$DB->delete_records('role_assignments', array('id'=>$r->id));
|
|
|
1631 |
}
|
|
|
1632 |
} else {
|
|
|
1633 |
$ra = reset($ras);
|
|
|
1634 |
}
|
|
|
1635 |
|
|
|
1636 |
// actually there is no need to update, reset anything or trigger any event, so just return
|
|
|
1637 |
return $ra->id;
|
|
|
1638 |
}
|
|
|
1639 |
|
|
|
1640 |
// Create a new entry
|
|
|
1641 |
$ra = new stdClass();
|
|
|
1642 |
$ra->roleid = $roleid;
|
|
|
1643 |
$ra->contextid = $context->id;
|
|
|
1644 |
$ra->userid = $userid;
|
|
|
1645 |
$ra->component = $component;
|
|
|
1646 |
$ra->itemid = $itemid;
|
|
|
1647 |
$ra->timemodified = $timemodified;
|
|
|
1648 |
$ra->modifierid = empty($USER->id) ? 0 : $USER->id;
|
|
|
1649 |
$ra->sortorder = 0;
|
|
|
1650 |
|
|
|
1651 |
$ra->id = $DB->insert_record('role_assignments', $ra);
|
|
|
1652 |
|
|
|
1653 |
// Role assignments have changed, so mark user as dirty.
|
|
|
1654 |
mark_user_dirty($userid);
|
|
|
1655 |
|
|
|
1656 |
core_course_category::role_assignment_changed($roleid, $context);
|
|
|
1657 |
|
|
|
1658 |
$event = \core\event\role_assigned::create(array(
|
|
|
1659 |
'context' => $context,
|
|
|
1660 |
'objectid' => $ra->roleid,
|
|
|
1661 |
'relateduserid' => $ra->userid,
|
|
|
1662 |
'other' => array(
|
|
|
1663 |
'id' => $ra->id,
|
|
|
1664 |
'component' => $ra->component,
|
|
|
1665 |
'itemid' => $ra->itemid
|
|
|
1666 |
)
|
|
|
1667 |
));
|
|
|
1668 |
$event->add_record_snapshot('role_assignments', $ra);
|
|
|
1669 |
$event->trigger();
|
|
|
1670 |
|
|
|
1671 |
// Dispatch the hook for post role assignment actions.
|
|
|
1672 |
$hook = new \core\hook\access\after_role_assigned(
|
|
|
1673 |
context: $context,
|
|
|
1674 |
userid: $userid,
|
|
|
1675 |
);
|
|
|
1676 |
\core\di::get(\core\hook\manager::class)->dispatch($hook);
|
|
|
1677 |
|
|
|
1678 |
return $ra->id;
|
|
|
1679 |
}
|
|
|
1680 |
|
|
|
1681 |
/**
|
|
|
1682 |
* Removes one role assignment
|
|
|
1683 |
*
|
|
|
1684 |
* @param int $roleid
|
|
|
1685 |
* @param int $userid
|
|
|
1686 |
* @param int $contextid
|
|
|
1687 |
* @param string $component
|
|
|
1688 |
* @param int $itemid
|
|
|
1689 |
* @return void
|
|
|
1690 |
*/
|
|
|
1691 |
function role_unassign($roleid, $userid, $contextid, $component = '', $itemid = 0) {
|
|
|
1692 |
// first make sure the params make sense
|
|
|
1693 |
if ($roleid == 0 or $userid == 0 or $contextid == 0) {
|
|
|
1694 |
throw new coding_exception('Invalid call to role_unassign(), please use role_unassign_all() when removing multiple role assignments');
|
|
|
1695 |
}
|
|
|
1696 |
|
|
|
1697 |
if ($itemid) {
|
|
|
1698 |
if (strpos($component, '_') === false) {
|
|
|
1699 |
throw new coding_exception('Invalid call to role_assign(), component must start with plugin type such as "enrol_" when itemid specified', 'component:'.$component);
|
|
|
1700 |
}
|
|
|
1701 |
} else {
|
|
|
1702 |
$itemid = 0;
|
|
|
1703 |
if ($component !== '' and strpos($component, '_') === false) {
|
|
|
1704 |
throw new coding_exception('Invalid call to role_assign(), invalid component string', 'component:'.$component);
|
|
|
1705 |
}
|
|
|
1706 |
}
|
|
|
1707 |
|
|
|
1708 |
role_unassign_all(array('roleid'=>$roleid, 'userid'=>$userid, 'contextid'=>$contextid, 'component'=>$component, 'itemid'=>$itemid), false, false);
|
|
|
1709 |
}
|
|
|
1710 |
|
|
|
1711 |
/**
|
|
|
1712 |
* Removes multiple role assignments, parameters may contain:
|
|
|
1713 |
* 'roleid', 'userid', 'contextid', 'component', 'enrolid'.
|
|
|
1714 |
*
|
|
|
1715 |
* @param array $params role assignment parameters
|
|
|
1716 |
* @param bool $subcontexts unassign in subcontexts too
|
|
|
1717 |
* @param bool $includemanual include manual role assignments too
|
|
|
1718 |
* @return void
|
|
|
1719 |
*/
|
|
|
1720 |
function role_unassign_all(array $params, $subcontexts = false, $includemanual = false) {
|
|
|
1721 |
global $USER, $CFG, $DB;
|
|
|
1722 |
|
|
|
1723 |
if (!$params) {
|
|
|
1724 |
throw new coding_exception('Missing parameters in role_unsassign_all() call');
|
|
|
1725 |
}
|
|
|
1726 |
|
|
|
1727 |
$allowed = array('roleid', 'userid', 'contextid', 'component', 'itemid');
|
|
|
1728 |
foreach ($params as $key=>$value) {
|
|
|
1729 |
if (!in_array($key, $allowed)) {
|
|
|
1730 |
throw new coding_exception('Unknown role_unsassign_all() parameter key', 'key:'.$key);
|
|
|
1731 |
}
|
|
|
1732 |
}
|
|
|
1733 |
|
|
|
1734 |
if (isset($params['component']) and $params['component'] !== '' and strpos($params['component'], '_') === false) {
|
|
|
1735 |
throw new coding_exception('Invalid component paramter in role_unsassign_all() call', 'component:'.$params['component']);
|
|
|
1736 |
}
|
|
|
1737 |
|
|
|
1738 |
if ($includemanual) {
|
|
|
1739 |
if (!isset($params['component']) or $params['component'] === '') {
|
|
|
1740 |
throw new coding_exception('include manual parameter requires component parameter in role_unsassign_all() call');
|
|
|
1741 |
}
|
|
|
1742 |
}
|
|
|
1743 |
|
|
|
1744 |
if ($subcontexts) {
|
|
|
1745 |
if (empty($params['contextid'])) {
|
|
|
1746 |
throw new coding_exception('subcontexts paramtere requires component parameter in role_unsassign_all() call');
|
|
|
1747 |
}
|
|
|
1748 |
}
|
|
|
1749 |
|
|
|
1750 |
$ras = $DB->get_records('role_assignments', $params);
|
|
|
1751 |
foreach ($ras as $ra) {
|
|
|
1752 |
$DB->delete_records('role_assignments', array('id'=>$ra->id));
|
|
|
1753 |
if ($context = context::instance_by_id($ra->contextid, IGNORE_MISSING)) {
|
|
|
1754 |
// Role assignments have changed, so mark user as dirty.
|
|
|
1755 |
mark_user_dirty($ra->userid);
|
|
|
1756 |
|
|
|
1757 |
$event = \core\event\role_unassigned::create(array(
|
|
|
1758 |
'context' => $context,
|
|
|
1759 |
'objectid' => $ra->roleid,
|
|
|
1760 |
'relateduserid' => $ra->userid,
|
|
|
1761 |
'other' => array(
|
|
|
1762 |
'id' => $ra->id,
|
|
|
1763 |
'component' => $ra->component,
|
|
|
1764 |
'itemid' => $ra->itemid
|
|
|
1765 |
)
|
|
|
1766 |
));
|
|
|
1767 |
$event->add_record_snapshot('role_assignments', $ra);
|
|
|
1768 |
$event->trigger();
|
|
|
1769 |
core_course_category::role_assignment_changed($ra->roleid, $context);
|
|
|
1770 |
|
|
|
1771 |
// Dispatch the hook for post role assignment actions.
|
|
|
1772 |
$hook = new \core\hook\access\after_role_unassigned(
|
|
|
1773 |
context: $context,
|
|
|
1774 |
userid: $ra->userid,
|
|
|
1775 |
);
|
|
|
1776 |
\core\di::get(\core\hook\manager::class)->dispatch($hook);
|
|
|
1777 |
}
|
|
|
1778 |
}
|
|
|
1779 |
unset($ras);
|
|
|
1780 |
|
|
|
1781 |
// process subcontexts
|
|
|
1782 |
if ($subcontexts and $context = context::instance_by_id($params['contextid'], IGNORE_MISSING)) {
|
|
|
1783 |
if ($params['contextid'] instanceof context) {
|
|
|
1784 |
$context = $params['contextid'];
|
|
|
1785 |
} else {
|
|
|
1786 |
$context = context::instance_by_id($params['contextid'], IGNORE_MISSING);
|
|
|
1787 |
}
|
|
|
1788 |
|
|
|
1789 |
if ($context) {
|
|
|
1790 |
$contexts = $context->get_child_contexts();
|
|
|
1791 |
$mparams = $params;
|
|
|
1792 |
foreach ($contexts as $context) {
|
|
|
1793 |
$mparams['contextid'] = $context->id;
|
|
|
1794 |
$ras = $DB->get_records('role_assignments', $mparams);
|
|
|
1795 |
foreach ($ras as $ra) {
|
|
|
1796 |
$DB->delete_records('role_assignments', array('id'=>$ra->id));
|
|
|
1797 |
// Role assignments have changed, so mark user as dirty.
|
|
|
1798 |
mark_user_dirty($ra->userid);
|
|
|
1799 |
|
|
|
1800 |
$event = \core\event\role_unassigned::create(
|
|
|
1801 |
array('context'=>$context, 'objectid'=>$ra->roleid, 'relateduserid'=>$ra->userid,
|
|
|
1802 |
'other'=>array('id'=>$ra->id, 'component'=>$ra->component, 'itemid'=>$ra->itemid)));
|
|
|
1803 |
$event->add_record_snapshot('role_assignments', $ra);
|
|
|
1804 |
$event->trigger();
|
|
|
1805 |
core_course_category::role_assignment_changed($ra->roleid, $context);
|
|
|
1806 |
}
|
|
|
1807 |
}
|
|
|
1808 |
}
|
|
|
1809 |
}
|
|
|
1810 |
|
|
|
1811 |
// do this once more for all manual role assignments
|
|
|
1812 |
if ($includemanual) {
|
|
|
1813 |
$params['component'] = '';
|
|
|
1814 |
role_unassign_all($params, $subcontexts, false);
|
|
|
1815 |
}
|
|
|
1816 |
}
|
|
|
1817 |
|
|
|
1818 |
/**
|
|
|
1819 |
* Mark a user as dirty (with timestamp) so as to force reloading of the user session.
|
|
|
1820 |
*
|
|
|
1821 |
* @param int $userid
|
|
|
1822 |
* @return void
|
|
|
1823 |
*/
|
|
|
1824 |
function mark_user_dirty($userid) {
|
|
|
1825 |
global $CFG, $ACCESSLIB_PRIVATE;
|
|
|
1826 |
|
|
|
1827 |
if (during_initial_install()) {
|
|
|
1828 |
return;
|
|
|
1829 |
}
|
|
|
1830 |
|
|
|
1831 |
// Throw exception if invalid userid is provided.
|
|
|
1832 |
if (empty($userid)) {
|
|
|
1833 |
throw new coding_exception('Invalid user parameter supplied for mark_user_dirty() function!');
|
|
|
1834 |
}
|
|
|
1835 |
|
|
|
1836 |
// Set dirty flag in database, set dirty field locally, and clear local accessdata cache.
|
|
|
1837 |
set_cache_flag('accesslib/dirtyusers', $userid, 1, time() + $CFG->sessiontimeout);
|
|
|
1838 |
$ACCESSLIB_PRIVATE->dirtyusers[$userid] = 1;
|
|
|
1839 |
unset($ACCESSLIB_PRIVATE->accessdatabyuser[$userid]);
|
|
|
1840 |
}
|
|
|
1841 |
|
|
|
1842 |
/**
|
|
|
1843 |
* Determines if a user is currently logged in
|
|
|
1844 |
*
|
|
|
1845 |
* @category access
|
|
|
1846 |
*
|
|
|
1847 |
* @return bool
|
|
|
1848 |
*/
|
|
|
1849 |
function isloggedin() {
|
|
|
1850 |
global $USER;
|
|
|
1851 |
|
|
|
1852 |
return (!empty($USER->id));
|
|
|
1853 |
}
|
|
|
1854 |
|
|
|
1855 |
/**
|
|
|
1856 |
* Determines if a user is logged in as real guest user with username 'guest'.
|
|
|
1857 |
*
|
|
|
1858 |
* @category access
|
|
|
1859 |
*
|
|
|
1860 |
* @param int|object $user mixed user object or id, $USER if not specified
|
|
|
1861 |
* @return bool true if user is the real guest user, false if not logged in or other user
|
|
|
1862 |
*/
|
|
|
1863 |
function isguestuser($user = null) {
|
|
|
1864 |
global $USER, $DB, $CFG;
|
|
|
1865 |
|
|
|
1866 |
// make sure we have the user id cached in config table, because we are going to use it a lot
|
|
|
1867 |
if (empty($CFG->siteguest)) {
|
|
|
1868 |
if (!$guestid = $DB->get_field('user', 'id', array('username'=>'guest', 'mnethostid'=>$CFG->mnet_localhost_id))) {
|
|
|
1869 |
// guest does not exist yet, weird
|
|
|
1870 |
return false;
|
|
|
1871 |
}
|
|
|
1872 |
set_config('siteguest', $guestid);
|
|
|
1873 |
}
|
|
|
1874 |
if ($user === null) {
|
|
|
1875 |
$user = $USER;
|
|
|
1876 |
}
|
|
|
1877 |
|
|
|
1878 |
if ($user === null) {
|
|
|
1879 |
// happens when setting the $USER
|
|
|
1880 |
return false;
|
|
|
1881 |
|
|
|
1882 |
} else if (is_numeric($user)) {
|
|
|
1883 |
return ($CFG->siteguest == $user);
|
|
|
1884 |
|
|
|
1885 |
} else if (is_object($user)) {
|
|
|
1886 |
if (empty($user->id)) {
|
|
|
1887 |
return false; // not logged in means is not be guest
|
|
|
1888 |
} else {
|
|
|
1889 |
return ($CFG->siteguest == $user->id);
|
|
|
1890 |
}
|
|
|
1891 |
|
|
|
1892 |
} else {
|
|
|
1893 |
throw new coding_exception('Invalid user parameter supplied for isguestuser() function!');
|
|
|
1894 |
}
|
|
|
1895 |
}
|
|
|
1896 |
|
|
|
1897 |
/**
|
|
|
1898 |
* Does user have a (temporary or real) guest access to course?
|
|
|
1899 |
*
|
|
|
1900 |
* @category access
|
|
|
1901 |
*
|
|
|
1902 |
* @param context $context
|
|
|
1903 |
* @param stdClass|int $user
|
|
|
1904 |
* @return bool
|
|
|
1905 |
*/
|
|
|
1906 |
function is_guest(context $context, $user = null) {
|
|
|
1907 |
global $USER;
|
|
|
1908 |
|
|
|
1909 |
// first find the course context
|
|
|
1910 |
$coursecontext = $context->get_course_context();
|
|
|
1911 |
|
|
|
1912 |
// make sure there is a real user specified
|
|
|
1913 |
if ($user === null) {
|
|
|
1914 |
$userid = isset($USER->id) ? $USER->id : 0;
|
|
|
1915 |
} else {
|
|
|
1916 |
$userid = is_object($user) ? $user->id : $user;
|
|
|
1917 |
}
|
|
|
1918 |
|
|
|
1919 |
if (isguestuser($userid)) {
|
|
|
1920 |
// can not inspect or be enrolled
|
|
|
1921 |
return true;
|
|
|
1922 |
}
|
|
|
1923 |
|
|
|
1924 |
if (has_capability('moodle/course:view', $coursecontext, $user)) {
|
|
|
1925 |
// viewing users appear out of nowhere, they are neither guests nor participants
|
|
|
1926 |
return false;
|
|
|
1927 |
}
|
|
|
1928 |
|
|
|
1929 |
// consider only real active enrolments here
|
|
|
1930 |
if (is_enrolled($coursecontext, $user, '', true)) {
|
|
|
1931 |
return false;
|
|
|
1932 |
}
|
|
|
1933 |
|
|
|
1934 |
return true;
|
|
|
1935 |
}
|
|
|
1936 |
|
|
|
1937 |
/**
|
|
|
1938 |
* Returns true if the user has moodle/course:view capability in the course,
|
|
|
1939 |
* this is intended for admins, managers (aka small admins), inspectors, etc.
|
|
|
1940 |
*
|
|
|
1941 |
* @category access
|
|
|
1942 |
*
|
|
|
1943 |
* @param context $context
|
|
|
1944 |
* @param int|stdClass $user if null $USER is used
|
|
|
1945 |
* @param string $withcapability extra capability name
|
|
|
1946 |
* @return bool
|
|
|
1947 |
*/
|
|
|
1948 |
function is_viewing(context $context, $user = null, $withcapability = '') {
|
|
|
1949 |
// first find the course context
|
|
|
1950 |
$coursecontext = $context->get_course_context();
|
|
|
1951 |
|
|
|
1952 |
if (isguestuser($user)) {
|
|
|
1953 |
// can not inspect
|
|
|
1954 |
return false;
|
|
|
1955 |
}
|
|
|
1956 |
|
|
|
1957 |
if (!has_capability('moodle/course:view', $coursecontext, $user)) {
|
|
|
1958 |
// admins are allowed to inspect courses
|
|
|
1959 |
return false;
|
|
|
1960 |
}
|
|
|
1961 |
|
|
|
1962 |
if ($withcapability and !has_capability($withcapability, $context, $user)) {
|
|
|
1963 |
// site admins always have the capability, but the enrolment above blocks
|
|
|
1964 |
return false;
|
|
|
1965 |
}
|
|
|
1966 |
|
|
|
1967 |
return true;
|
|
|
1968 |
}
|
|
|
1969 |
|
|
|
1970 |
/**
|
|
|
1971 |
* Returns true if the user is able to access the course.
|
|
|
1972 |
*
|
|
|
1973 |
* This function is in no way, shape, or form a substitute for require_login.
|
|
|
1974 |
* It should only be used in circumstances where it is not possible to call require_login
|
|
|
1975 |
* such as the navigation.
|
|
|
1976 |
*
|
|
|
1977 |
* This function checks many of the methods of access to a course such as the view
|
|
|
1978 |
* capability, enrollments, and guest access. It also makes use of the cache
|
|
|
1979 |
* generated by require_login for guest access.
|
|
|
1980 |
*
|
|
|
1981 |
* The flags within the $USER object that are used here should NEVER be used outside
|
|
|
1982 |
* of this function can_access_course and require_login. Doing so WILL break future
|
|
|
1983 |
* versions.
|
|
|
1984 |
*
|
|
|
1985 |
* @param stdClass $course record
|
|
|
1986 |
* @param stdClass|int|null $user user record or id, current user if null
|
|
|
1987 |
* @param string $withcapability Check for this capability as well.
|
|
|
1988 |
* @param bool $onlyactive consider only active enrolments in enabled plugins and time restrictions
|
|
|
1989 |
* @return boolean Returns true if the user is able to access the course
|
|
|
1990 |
*/
|
|
|
1991 |
function can_access_course(stdClass $course, $user = null, $withcapability = '', $onlyactive = false) {
|
|
|
1992 |
global $DB, $USER;
|
|
|
1993 |
|
|
|
1994 |
// this function originally accepted $coursecontext parameter
|
|
|
1995 |
if ($course instanceof context) {
|
|
|
1996 |
if ($course instanceof context_course) {
|
|
|
1997 |
debugging('deprecated context parameter, please use $course record');
|
|
|
1998 |
$coursecontext = $course;
|
|
|
1999 |
$course = $DB->get_record('course', array('id'=>$coursecontext->instanceid));
|
|
|
2000 |
} else {
|
|
|
2001 |
debugging('Invalid context parameter, please use $course record');
|
|
|
2002 |
return false;
|
|
|
2003 |
}
|
|
|
2004 |
} else {
|
|
|
2005 |
$coursecontext = context_course::instance($course->id);
|
|
|
2006 |
}
|
|
|
2007 |
|
|
|
2008 |
if (!isset($USER->id)) {
|
|
|
2009 |
// should never happen
|
|
|
2010 |
$USER->id = 0;
|
|
|
2011 |
debugging('Course access check being performed on a user with no ID.', DEBUG_DEVELOPER);
|
|
|
2012 |
}
|
|
|
2013 |
|
|
|
2014 |
// make sure there is a user specified
|
|
|
2015 |
if ($user === null) {
|
|
|
2016 |
$userid = $USER->id;
|
|
|
2017 |
} else {
|
|
|
2018 |
$userid = is_object($user) ? $user->id : $user;
|
|
|
2019 |
}
|
|
|
2020 |
unset($user);
|
|
|
2021 |
|
|
|
2022 |
if ($withcapability and !has_capability($withcapability, $coursecontext, $userid)) {
|
|
|
2023 |
return false;
|
|
|
2024 |
}
|
|
|
2025 |
|
|
|
2026 |
if ($userid == $USER->id) {
|
|
|
2027 |
if (!empty($USER->access['rsw'][$coursecontext->path])) {
|
|
|
2028 |
// the fact that somebody switched role means they can access the course no matter to what role they switched
|
|
|
2029 |
return true;
|
|
|
2030 |
}
|
|
|
2031 |
}
|
|
|
2032 |
|
|
|
2033 |
if (!$course->visible and !has_capability('moodle/course:viewhiddencourses', $coursecontext, $userid)) {
|
|
|
2034 |
return false;
|
|
|
2035 |
}
|
|
|
2036 |
|
|
|
2037 |
if (is_viewing($coursecontext, $userid)) {
|
|
|
2038 |
return true;
|
|
|
2039 |
}
|
|
|
2040 |
|
|
|
2041 |
if ($userid != $USER->id) {
|
|
|
2042 |
// for performance reasons we do not verify temporary guest access for other users, sorry...
|
|
|
2043 |
return is_enrolled($coursecontext, $userid, '', $onlyactive);
|
|
|
2044 |
}
|
|
|
2045 |
|
|
|
2046 |
// === from here we deal only with $USER ===
|
|
|
2047 |
|
|
|
2048 |
$coursecontext->reload_if_dirty();
|
|
|
2049 |
|
|
|
2050 |
if (isset($USER->enrol['enrolled'][$course->id])) {
|
|
|
2051 |
if ($USER->enrol['enrolled'][$course->id] > time()) {
|
|
|
2052 |
return true;
|
|
|
2053 |
}
|
|
|
2054 |
}
|
|
|
2055 |
if (isset($USER->enrol['tempguest'][$course->id])) {
|
|
|
2056 |
if ($USER->enrol['tempguest'][$course->id] > time()) {
|
|
|
2057 |
return true;
|
|
|
2058 |
}
|
|
|
2059 |
}
|
|
|
2060 |
|
|
|
2061 |
if (is_enrolled($coursecontext, $USER, '', $onlyactive)) {
|
|
|
2062 |
return true;
|
|
|
2063 |
}
|
|
|
2064 |
|
|
|
2065 |
if (!core_course_category::can_view_course_info($course)) {
|
|
|
2066 |
// No guest access if user does not have capability to browse courses.
|
|
|
2067 |
return false;
|
|
|
2068 |
}
|
|
|
2069 |
|
|
|
2070 |
// if not enrolled try to gain temporary guest access
|
|
|
2071 |
$instances = $DB->get_records('enrol', array('courseid'=>$course->id, 'status'=>ENROL_INSTANCE_ENABLED), 'sortorder, id ASC');
|
|
|
2072 |
$enrols = enrol_get_plugins(true);
|
|
|
2073 |
foreach ($instances as $instance) {
|
|
|
2074 |
if (!isset($enrols[$instance->enrol])) {
|
|
|
2075 |
continue;
|
|
|
2076 |
}
|
|
|
2077 |
// Get a duration for the guest access, a timestamp in the future, 0 (always) or false.
|
|
|
2078 |
$until = $enrols[$instance->enrol]->try_guestaccess($instance);
|
|
|
2079 |
if ($until !== false and $until > time()) {
|
|
|
2080 |
$USER->enrol['tempguest'][$course->id] = $until;
|
|
|
2081 |
return true;
|
|
|
2082 |
}
|
|
|
2083 |
}
|
|
|
2084 |
if (isset($USER->enrol['tempguest'][$course->id])) {
|
|
|
2085 |
unset($USER->enrol['tempguest'][$course->id]);
|
|
|
2086 |
remove_temp_course_roles($coursecontext);
|
|
|
2087 |
}
|
|
|
2088 |
|
|
|
2089 |
return false;
|
|
|
2090 |
}
|
|
|
2091 |
|
|
|
2092 |
/**
|
|
|
2093 |
* Loads the capability definitions for the component (from file).
|
|
|
2094 |
*
|
|
|
2095 |
* Loads the capability definitions for the component (from file). If no
|
|
|
2096 |
* capabilities are defined for the component, we simply return an empty array.
|
|
|
2097 |
*
|
|
|
2098 |
* @access private
|
|
|
2099 |
* @param string $component full plugin name, examples: 'moodle', 'mod_forum'
|
|
|
2100 |
* @return array array of capabilities
|
|
|
2101 |
*/
|
|
|
2102 |
function load_capability_def($component) {
|
|
|
2103 |
$defpath = core_component::get_component_directory($component).'/db/access.php';
|
|
|
2104 |
|
|
|
2105 |
$capabilities = array();
|
|
|
2106 |
if (file_exists($defpath)) {
|
|
|
2107 |
require($defpath);
|
|
|
2108 |
if (!empty(${$component.'_capabilities'})) {
|
|
|
2109 |
// BC capability array name
|
|
|
2110 |
// since 2.0 we prefer $capabilities instead - it is easier to use and matches db/* files
|
|
|
2111 |
debugging('componentname_capabilities array is deprecated, please use $capabilities array only in access.php files');
|
|
|
2112 |
$capabilities = ${$component.'_capabilities'};
|
|
|
2113 |
}
|
|
|
2114 |
}
|
|
|
2115 |
|
|
|
2116 |
return $capabilities;
|
|
|
2117 |
}
|
|
|
2118 |
|
|
|
2119 |
/**
|
|
|
2120 |
* Gets the capabilities that have been cached in the database for this component.
|
|
|
2121 |
*
|
|
|
2122 |
* @access private
|
|
|
2123 |
* @param string $component - examples: 'moodle', 'mod_forum'
|
|
|
2124 |
* @return array array of capabilities
|
|
|
2125 |
*/
|
|
|
2126 |
function get_cached_capabilities($component = 'moodle') {
|
|
|
2127 |
global $DB;
|
|
|
2128 |
$caps = get_all_capabilities();
|
|
|
2129 |
$componentcaps = array();
|
|
|
2130 |
foreach ($caps as $cap) {
|
|
|
2131 |
if ($cap['component'] == $component) {
|
|
|
2132 |
$componentcaps[] = (object) $cap;
|
|
|
2133 |
}
|
|
|
2134 |
}
|
|
|
2135 |
return $componentcaps;
|
|
|
2136 |
}
|
|
|
2137 |
|
|
|
2138 |
/**
|
|
|
2139 |
* Returns default capabilities for given role archetype.
|
|
|
2140 |
*
|
|
|
2141 |
* @param string $archetype role archetype
|
|
|
2142 |
* @return array
|
|
|
2143 |
*/
|
|
|
2144 |
function get_default_capabilities($archetype) {
|
|
|
2145 |
global $DB;
|
|
|
2146 |
|
|
|
2147 |
if (!$archetype) {
|
|
|
2148 |
return array();
|
|
|
2149 |
}
|
|
|
2150 |
|
|
|
2151 |
$alldefs = array();
|
|
|
2152 |
$defaults = array();
|
|
|
2153 |
$components = array();
|
|
|
2154 |
$allcaps = get_all_capabilities();
|
|
|
2155 |
|
|
|
2156 |
foreach ($allcaps as $cap) {
|
|
|
2157 |
if (!in_array($cap['component'], $components)) {
|
|
|
2158 |
$components[] = $cap['component'];
|
|
|
2159 |
$alldefs = array_merge($alldefs, load_capability_def($cap['component']));
|
|
|
2160 |
}
|
|
|
2161 |
}
|
|
|
2162 |
foreach ($alldefs as $name=>$def) {
|
|
|
2163 |
// Use array 'archetypes if available. Only if not specified, use 'legacy'.
|
|
|
2164 |
if (isset($def['archetypes'])) {
|
|
|
2165 |
if (isset($def['archetypes'][$archetype])) {
|
|
|
2166 |
$defaults[$name] = $def['archetypes'][$archetype];
|
|
|
2167 |
}
|
|
|
2168 |
// 'legacy' is for backward compatibility with 1.9 access.php
|
|
|
2169 |
} else {
|
|
|
2170 |
if (isset($def['legacy'][$archetype])) {
|
|
|
2171 |
$defaults[$name] = $def['legacy'][$archetype];
|
|
|
2172 |
}
|
|
|
2173 |
}
|
|
|
2174 |
}
|
|
|
2175 |
|
|
|
2176 |
return $defaults;
|
|
|
2177 |
}
|
|
|
2178 |
|
|
|
2179 |
/**
|
|
|
2180 |
* Return default roles that can be assigned, overridden or switched
|
|
|
2181 |
* by give role archetype.
|
|
|
2182 |
*
|
|
|
2183 |
* @param string $type assign|override|switch|view
|
|
|
2184 |
* @param string $archetype
|
|
|
2185 |
* @return array of role ids
|
|
|
2186 |
*/
|
|
|
2187 |
function get_default_role_archetype_allows($type, $archetype) {
|
|
|
2188 |
global $DB;
|
|
|
2189 |
|
|
|
2190 |
if (empty($archetype)) {
|
|
|
2191 |
return array();
|
|
|
2192 |
}
|
|
|
2193 |
|
|
|
2194 |
$roles = $DB->get_records('role');
|
|
|
2195 |
$archetypemap = array();
|
|
|
2196 |
foreach ($roles as $role) {
|
|
|
2197 |
if ($role->archetype) {
|
|
|
2198 |
$archetypemap[$role->archetype][$role->id] = $role->id;
|
|
|
2199 |
}
|
|
|
2200 |
}
|
|
|
2201 |
|
|
|
2202 |
$defaults = array(
|
|
|
2203 |
'assign' => array(
|
|
|
2204 |
'manager' => array('manager', 'coursecreator', 'editingteacher', 'teacher', 'student'),
|
|
|
2205 |
'coursecreator' => array(),
|
|
|
2206 |
'editingteacher' => array('teacher', 'student'),
|
|
|
2207 |
'teacher' => array(),
|
|
|
2208 |
'student' => array(),
|
|
|
2209 |
'guest' => array(),
|
|
|
2210 |
'user' => array(),
|
|
|
2211 |
'frontpage' => array(),
|
|
|
2212 |
),
|
|
|
2213 |
'override' => array(
|
|
|
2214 |
'manager' => array('manager', 'coursecreator', 'editingteacher', 'teacher', 'student', 'guest', 'user', 'frontpage'),
|
|
|
2215 |
'coursecreator' => array(),
|
|
|
2216 |
'editingteacher' => array('teacher', 'student', 'guest'),
|
|
|
2217 |
'teacher' => array(),
|
|
|
2218 |
'student' => array(),
|
|
|
2219 |
'guest' => array(),
|
|
|
2220 |
'user' => array(),
|
|
|
2221 |
'frontpage' => array(),
|
|
|
2222 |
),
|
|
|
2223 |
'switch' => array(
|
|
|
2224 |
'manager' => array('editingteacher', 'teacher', 'student', 'guest'),
|
|
|
2225 |
'coursecreator' => array(),
|
|
|
2226 |
'editingteacher' => array('teacher', 'student', 'guest'),
|
|
|
2227 |
'teacher' => array('student', 'guest'),
|
|
|
2228 |
'student' => array(),
|
|
|
2229 |
'guest' => array(),
|
|
|
2230 |
'user' => array(),
|
|
|
2231 |
'frontpage' => array(),
|
|
|
2232 |
),
|
|
|
2233 |
'view' => array(
|
|
|
2234 |
'manager' => array('manager', 'coursecreator', 'editingteacher', 'teacher', 'student', 'guest', 'user', 'frontpage'),
|
|
|
2235 |
'coursecreator' => array('coursecreator', 'editingteacher', 'teacher', 'student'),
|
|
|
2236 |
'editingteacher' => array('coursecreator', 'editingteacher', 'teacher', 'student'),
|
|
|
2237 |
'teacher' => array('coursecreator', 'editingteacher', 'teacher', 'student'),
|
|
|
2238 |
'student' => array('coursecreator', 'editingteacher', 'teacher', 'student'),
|
|
|
2239 |
'guest' => array(),
|
|
|
2240 |
'user' => array(),
|
|
|
2241 |
'frontpage' => array(),
|
|
|
2242 |
),
|
|
|
2243 |
);
|
|
|
2244 |
|
|
|
2245 |
if (!isset($defaults[$type][$archetype])) {
|
|
|
2246 |
debugging("Unknown type '$type'' or archetype '$archetype''");
|
|
|
2247 |
return array();
|
|
|
2248 |
}
|
|
|
2249 |
|
|
|
2250 |
$return = array();
|
|
|
2251 |
foreach ($defaults[$type][$archetype] as $at) {
|
|
|
2252 |
if (isset($archetypemap[$at])) {
|
|
|
2253 |
foreach ($archetypemap[$at] as $roleid) {
|
|
|
2254 |
$return[$roleid] = $roleid;
|
|
|
2255 |
}
|
|
|
2256 |
}
|
|
|
2257 |
}
|
|
|
2258 |
|
|
|
2259 |
return $return;
|
|
|
2260 |
}
|
|
|
2261 |
|
|
|
2262 |
/**
|
|
|
2263 |
* Reset role capabilities to default according to selected role archetype.
|
|
|
2264 |
* If no archetype selected, removes all capabilities.
|
|
|
2265 |
*
|
|
|
2266 |
* This applies to capabilities that are assigned to the role (that you could
|
|
|
2267 |
* edit in the 'define roles' interface), and not to any capability overrides
|
|
|
2268 |
* in different locations.
|
|
|
2269 |
*
|
|
|
2270 |
* @param int $roleid ID of role to reset capabilities for
|
|
|
2271 |
*/
|
|
|
2272 |
function reset_role_capabilities($roleid) {
|
|
|
2273 |
global $DB;
|
|
|
2274 |
|
|
|
2275 |
$role = $DB->get_record('role', array('id'=>$roleid), '*', MUST_EXIST);
|
|
|
2276 |
$defaultcaps = get_default_capabilities($role->archetype);
|
|
|
2277 |
|
|
|
2278 |
$systemcontext = context_system::instance();
|
|
|
2279 |
|
|
|
2280 |
$DB->delete_records('role_capabilities',
|
|
|
2281 |
array('roleid' => $roleid, 'contextid' => $systemcontext->id));
|
|
|
2282 |
|
|
|
2283 |
foreach ($defaultcaps as $cap=>$permission) {
|
|
|
2284 |
assign_capability($cap, $permission, $roleid, $systemcontext->id);
|
|
|
2285 |
}
|
|
|
2286 |
|
|
|
2287 |
// Reset any cache of this role, including MUC.
|
|
|
2288 |
accesslib_clear_role_cache($roleid);
|
|
|
2289 |
}
|
|
|
2290 |
|
|
|
2291 |
/**
|
|
|
2292 |
* Updates the capabilities table with the component capability definitions.
|
|
|
2293 |
* If no parameters are given, the function updates the core moodle
|
|
|
2294 |
* capabilities.
|
|
|
2295 |
*
|
|
|
2296 |
* Note that the absence of the db/access.php capabilities definition file
|
|
|
2297 |
* will cause any stored capabilities for the component to be removed from
|
|
|
2298 |
* the database.
|
|
|
2299 |
*
|
|
|
2300 |
* @access private
|
|
|
2301 |
* @param string $component examples: 'moodle', 'mod_forum', 'block_activity_results'
|
|
|
2302 |
* @return boolean true if success, exception in case of any problems
|
|
|
2303 |
*/
|
|
|
2304 |
function update_capabilities($component = 'moodle') {
|
|
|
2305 |
global $DB, $OUTPUT;
|
|
|
2306 |
|
|
|
2307 |
// Allow temporary caches to be used during install, dramatically boosting performance.
|
|
|
2308 |
$token = new \core_cache\allow_temporary_caches();
|
|
|
2309 |
|
|
|
2310 |
$storedcaps = array();
|
|
|
2311 |
|
|
|
2312 |
$filecaps = load_capability_def($component);
|
|
|
2313 |
foreach ($filecaps as $capname=>$unused) {
|
|
|
2314 |
if (!preg_match('|^[a-z]+/[a-z_0-9]+:[a-z_0-9]+$|', $capname)) {
|
|
|
2315 |
debugging("Coding problem: Invalid capability name '$capname', use 'clonepermissionsfrom' field for migration.");
|
|
|
2316 |
}
|
|
|
2317 |
}
|
|
|
2318 |
|
|
|
2319 |
// It is possible somebody directly modified the DB (according to accesslib_test anyway).
|
|
|
2320 |
// So ensure our updating is based on fresh data.
|
|
|
2321 |
cache::make('core', 'capabilities')->delete('core_capabilities');
|
|
|
2322 |
|
|
|
2323 |
$cachedcaps = get_cached_capabilities($component);
|
|
|
2324 |
if ($cachedcaps) {
|
|
|
2325 |
foreach ($cachedcaps as $cachedcap) {
|
|
|
2326 |
array_push($storedcaps, $cachedcap->name);
|
|
|
2327 |
// update risk bitmasks and context levels in existing capabilities if needed
|
|
|
2328 |
if (array_key_exists($cachedcap->name, $filecaps)) {
|
|
|
2329 |
if (!array_key_exists('riskbitmask', $filecaps[$cachedcap->name])) {
|
|
|
2330 |
$filecaps[$cachedcap->name]['riskbitmask'] = 0; // no risk if not specified
|
|
|
2331 |
}
|
|
|
2332 |
if ($cachedcap->captype != $filecaps[$cachedcap->name]['captype']) {
|
|
|
2333 |
$updatecap = new stdClass();
|
|
|
2334 |
$updatecap->id = $cachedcap->id;
|
|
|
2335 |
$updatecap->captype = $filecaps[$cachedcap->name]['captype'];
|
|
|
2336 |
$DB->update_record('capabilities', $updatecap);
|
|
|
2337 |
}
|
|
|
2338 |
if ($cachedcap->riskbitmask != $filecaps[$cachedcap->name]['riskbitmask']) {
|
|
|
2339 |
$updatecap = new stdClass();
|
|
|
2340 |
$updatecap->id = $cachedcap->id;
|
|
|
2341 |
$updatecap->riskbitmask = $filecaps[$cachedcap->name]['riskbitmask'];
|
|
|
2342 |
$DB->update_record('capabilities', $updatecap);
|
|
|
2343 |
}
|
|
|
2344 |
|
|
|
2345 |
if (!array_key_exists('contextlevel', $filecaps[$cachedcap->name])) {
|
|
|
2346 |
$filecaps[$cachedcap->name]['contextlevel'] = 0; // no context level defined
|
|
|
2347 |
}
|
|
|
2348 |
if ($cachedcap->contextlevel != $filecaps[$cachedcap->name]['contextlevel']) {
|
|
|
2349 |
$updatecap = new stdClass();
|
|
|
2350 |
$updatecap->id = $cachedcap->id;
|
|
|
2351 |
$updatecap->contextlevel = $filecaps[$cachedcap->name]['contextlevel'];
|
|
|
2352 |
$DB->update_record('capabilities', $updatecap);
|
|
|
2353 |
}
|
|
|
2354 |
}
|
|
|
2355 |
}
|
|
|
2356 |
}
|
|
|
2357 |
|
|
|
2358 |
// Flush the cached again, as we have changed DB.
|
|
|
2359 |
cache::make('core', 'capabilities')->delete('core_capabilities');
|
|
|
2360 |
|
|
|
2361 |
// Are there new capabilities in the file definition?
|
|
|
2362 |
$newcaps = array();
|
|
|
2363 |
|
|
|
2364 |
foreach ($filecaps as $filecap => $def) {
|
|
|
2365 |
if (!$storedcaps ||
|
|
|
2366 |
($storedcaps && in_array($filecap, $storedcaps) === false)) {
|
|
|
2367 |
if (!array_key_exists('riskbitmask', $def)) {
|
|
|
2368 |
$def['riskbitmask'] = 0; // no risk if not specified
|
|
|
2369 |
}
|
|
|
2370 |
$newcaps[$filecap] = $def;
|
|
|
2371 |
}
|
|
|
2372 |
}
|
|
|
2373 |
// Add new capabilities to the stored definition.
|
|
|
2374 |
$existingcaps = $DB->get_records_menu('capabilities', array(), 'id', 'id, name');
|
|
|
2375 |
$capabilityobjects = [];
|
|
|
2376 |
foreach ($newcaps as $capname => $capdef) {
|
|
|
2377 |
$capability = new stdClass();
|
|
|
2378 |
$capability->name = $capname;
|
|
|
2379 |
$capability->captype = $capdef['captype'];
|
|
|
2380 |
$capability->contextlevel = $capdef['contextlevel'];
|
|
|
2381 |
$capability->component = $component;
|
|
|
2382 |
$capability->riskbitmask = $capdef['riskbitmask'];
|
|
|
2383 |
$capabilityobjects[] = $capability;
|
|
|
2384 |
}
|
|
|
2385 |
$DB->insert_records('capabilities', $capabilityobjects);
|
|
|
2386 |
|
|
|
2387 |
// Flush the cache, as we have changed DB.
|
|
|
2388 |
cache::make('core', 'capabilities')->delete('core_capabilities');
|
|
|
2389 |
|
|
|
2390 |
foreach ($newcaps as $capname => $capdef) {
|
|
|
2391 |
if (isset($capdef['clonepermissionsfrom']) && in_array($capdef['clonepermissionsfrom'], $existingcaps)){
|
|
|
2392 |
if ($rolecapabilities = $DB->get_records_sql('
|
|
|
2393 |
SELECT rc.*,
|
|
|
2394 |
CASE WHEN EXISTS(SELECT 1
|
|
|
2395 |
FROM {role_capabilities} rc2
|
|
|
2396 |
WHERE rc2.capability = ?
|
|
|
2397 |
AND rc2.contextid = rc.contextid
|
|
|
2398 |
AND rc2.roleid = rc.roleid) THEN 1 ELSE 0 END AS entryexists,
|
|
|
2399 |
' . context_helper::get_preload_record_columns_sql('x') .'
|
|
|
2400 |
FROM {role_capabilities} rc
|
|
|
2401 |
JOIN {context} x ON x.id = rc.contextid
|
|
|
2402 |
WHERE rc.capability = ?',
|
|
|
2403 |
[$capname, $capdef['clonepermissionsfrom']])) {
|
|
|
2404 |
foreach ($rolecapabilities as $rolecapability) {
|
|
|
2405 |
// Preload the context and add performance hints based on the SQL query above.
|
|
|
2406 |
context_helper::preload_from_record($rolecapability);
|
|
|
2407 |
$performancehints = [ACCESSLIB_HINT_CONTEXT_EXISTS];
|
|
|
2408 |
if (!$rolecapability->entryexists) {
|
|
|
2409 |
$performancehints[] = ACCESSLIB_HINT_NO_EXISTING;
|
|
|
2410 |
}
|
|
|
2411 |
//assign_capability will update rather than insert if capability exists
|
|
|
2412 |
if (!assign_capability($capname, $rolecapability->permission,
|
|
|
2413 |
$rolecapability->roleid, $rolecapability->contextid, true, $performancehints)) {
|
|
|
2414 |
echo $OUTPUT->notification('Could not clone capabilities for '.$capname);
|
|
|
2415 |
}
|
|
|
2416 |
}
|
|
|
2417 |
}
|
|
|
2418 |
// we ignore archetype key if we have cloned permissions
|
|
|
2419 |
} else if (isset($capdef['archetypes']) && is_array($capdef['archetypes'])) {
|
|
|
2420 |
assign_legacy_capabilities($capname, $capdef['archetypes']);
|
|
|
2421 |
// 'legacy' is for backward compatibility with 1.9 access.php
|
|
|
2422 |
} else if (isset($capdef['legacy']) && is_array($capdef['legacy'])) {
|
|
|
2423 |
assign_legacy_capabilities($capname, $capdef['legacy']);
|
|
|
2424 |
}
|
|
|
2425 |
}
|
|
|
2426 |
// Are there any capabilities that have been removed from the file
|
|
|
2427 |
// definition that we need to delete from the stored capabilities and
|
|
|
2428 |
// role assignments?
|
|
|
2429 |
capabilities_cleanup($component, $filecaps);
|
|
|
2430 |
|
|
|
2431 |
// reset static caches
|
|
|
2432 |
accesslib_reset_role_cache();
|
|
|
2433 |
|
|
|
2434 |
// Flush the cached again, as we have changed DB.
|
|
|
2435 |
cache::make('core', 'capabilities')->delete('core_capabilities');
|
|
|
2436 |
|
|
|
2437 |
return true;
|
|
|
2438 |
}
|
|
|
2439 |
|
|
|
2440 |
/**
|
|
|
2441 |
* Deletes cached capabilities that are no longer needed by the component.
|
|
|
2442 |
* Also unassigns these capabilities from any roles that have them.
|
|
|
2443 |
* NOTE: this function is called from lib/db/upgrade.php
|
|
|
2444 |
*
|
|
|
2445 |
* @access private
|
|
|
2446 |
* @param string $component examples: 'moodle', 'mod_forum', 'block_activity_results'
|
|
|
2447 |
* @param array $newcapdef array of the new capability definitions that will be
|
|
|
2448 |
* compared with the cached capabilities
|
|
|
2449 |
* @return int number of deprecated capabilities that have been removed
|
|
|
2450 |
*/
|
|
|
2451 |
function capabilities_cleanup($component, $newcapdef = null) {
|
|
|
2452 |
global $DB;
|
|
|
2453 |
|
|
|
2454 |
$removedcount = 0;
|
|
|
2455 |
|
|
|
2456 |
if ($cachedcaps = get_cached_capabilities($component)) {
|
|
|
2457 |
foreach ($cachedcaps as $cachedcap) {
|
|
|
2458 |
if (empty($newcapdef) ||
|
|
|
2459 |
array_key_exists($cachedcap->name, $newcapdef) === false) {
|
|
|
2460 |
|
|
|
2461 |
// Delete from roles.
|
|
|
2462 |
if ($roles = get_roles_with_capability($cachedcap->name)) {
|
|
|
2463 |
foreach ($roles as $role) {
|
| 1441 |
ariadna |
2464 |
if (!unassign_capability(
|
|
|
2465 |
capability: $cachedcap->name,
|
|
|
2466 |
roleid: $role->id,
|
|
|
2467 |
showdebug: false, // Suppress debugging messages in the get_capability_info().
|
|
|
2468 |
)) {
|
| 1 |
efrain |
2469 |
throw new \moodle_exception('cannotunassigncap', 'error', '',
|
|
|
2470 |
(object)array('cap' => $cachedcap->name, 'role' => $role->name));
|
|
|
2471 |
}
|
|
|
2472 |
}
|
|
|
2473 |
}
|
|
|
2474 |
|
|
|
2475 |
// Remove from role_capabilities for any old ones.
|
|
|
2476 |
$DB->delete_records('role_capabilities', array('capability' => $cachedcap->name));
|
|
|
2477 |
|
|
|
2478 |
// Remove from capabilities cache.
|
|
|
2479 |
$DB->delete_records('capabilities', array('name' => $cachedcap->name));
|
|
|
2480 |
$removedcount++;
|
|
|
2481 |
} // End if.
|
|
|
2482 |
}
|
|
|
2483 |
}
|
|
|
2484 |
if ($removedcount) {
|
|
|
2485 |
cache::make('core', 'capabilities')->delete('core_capabilities');
|
|
|
2486 |
}
|
|
|
2487 |
return $removedcount;
|
|
|
2488 |
}
|
|
|
2489 |
|
|
|
2490 |
/**
|
|
|
2491 |
* Returns an array of all the known types of risk
|
|
|
2492 |
* The array keys can be used, for example as CSS class names, or in calls to
|
|
|
2493 |
* print_risk_icon. The values are the corresponding RISK_ constants.
|
|
|
2494 |
*
|
|
|
2495 |
* @return array all the known types of risk.
|
|
|
2496 |
*/
|
|
|
2497 |
function get_all_risks() {
|
|
|
2498 |
return array(
|
|
|
2499 |
'riskmanagetrust' => RISK_MANAGETRUST,
|
|
|
2500 |
'riskconfig' => RISK_CONFIG,
|
|
|
2501 |
'riskxss' => RISK_XSS,
|
|
|
2502 |
'riskpersonal' => RISK_PERSONAL,
|
|
|
2503 |
'riskspam' => RISK_SPAM,
|
|
|
2504 |
'riskdataloss' => RISK_DATALOSS,
|
|
|
2505 |
);
|
|
|
2506 |
}
|
|
|
2507 |
|
|
|
2508 |
/**
|
|
|
2509 |
* Return a link to moodle docs for a given capability name
|
|
|
2510 |
*
|
|
|
2511 |
* @param stdClass $capability a capability - a row from the mdl_capabilities table.
|
|
|
2512 |
* @return string the human-readable capability name as a link to Moodle Docs.
|
|
|
2513 |
*/
|
|
|
2514 |
function get_capability_docs_link($capability) {
|
|
|
2515 |
$url = get_docs_url('Capabilities/' . $capability->name);
|
|
|
2516 |
return '<a onclick="this.target=\'docspopup\'" href="' . $url . '">' . get_capability_string($capability->name) . '</a>';
|
|
|
2517 |
}
|
|
|
2518 |
|
|
|
2519 |
/**
|
|
|
2520 |
* This function pulls out all the resolved capabilities (overrides and
|
|
|
2521 |
* defaults) of a role used in capability overrides in contexts at a given
|
|
|
2522 |
* context.
|
|
|
2523 |
*
|
|
|
2524 |
* @param int $roleid
|
|
|
2525 |
* @param context $context
|
|
|
2526 |
* @param string $cap capability, optional, defaults to ''
|
|
|
2527 |
* @return array Array of capabilities
|
|
|
2528 |
*/
|
|
|
2529 |
function role_context_capabilities($roleid, context $context, $cap = '') {
|
|
|
2530 |
global $DB;
|
|
|
2531 |
|
|
|
2532 |
$contexts = $context->get_parent_context_ids(true);
|
|
|
2533 |
$contexts = '('.implode(',', $contexts).')';
|
|
|
2534 |
|
|
|
2535 |
$params = array($roleid);
|
|
|
2536 |
|
|
|
2537 |
if ($cap) {
|
|
|
2538 |
$search = " AND rc.capability = ? ";
|
|
|
2539 |
$params[] = $cap;
|
|
|
2540 |
} else {
|
|
|
2541 |
$search = '';
|
|
|
2542 |
}
|
|
|
2543 |
|
|
|
2544 |
$sql = "SELECT rc.*
|
|
|
2545 |
FROM {role_capabilities} rc
|
|
|
2546 |
JOIN {context} c ON rc.contextid = c.id
|
|
|
2547 |
JOIN {capabilities} cap ON rc.capability = cap.name
|
|
|
2548 |
WHERE rc.contextid in $contexts
|
|
|
2549 |
AND rc.roleid = ?
|
|
|
2550 |
$search
|
|
|
2551 |
ORDER BY c.contextlevel DESC, rc.capability DESC";
|
|
|
2552 |
|
|
|
2553 |
$capabilities = array();
|
|
|
2554 |
|
|
|
2555 |
if ($records = $DB->get_records_sql($sql, $params)) {
|
|
|
2556 |
// We are traversing via reverse order.
|
|
|
2557 |
foreach ($records as $record) {
|
|
|
2558 |
// If not set yet (i.e. inherit or not set at all), or currently we have a prohibit
|
|
|
2559 |
if (!isset($capabilities[$record->capability]) || $record->permission<-500) {
|
|
|
2560 |
$capabilities[$record->capability] = $record->permission;
|
|
|
2561 |
}
|
|
|
2562 |
}
|
|
|
2563 |
}
|
|
|
2564 |
return $capabilities;
|
|
|
2565 |
}
|
|
|
2566 |
|
|
|
2567 |
/**
|
|
|
2568 |
* Constructs array with contextids as first parameter and context paths,
|
|
|
2569 |
* in both cases bottom top including self.
|
|
|
2570 |
*
|
|
|
2571 |
* @access private
|
|
|
2572 |
* @param context $context
|
|
|
2573 |
* @return array
|
|
|
2574 |
*/
|
|
|
2575 |
function get_context_info_list(context $context) {
|
|
|
2576 |
$contextids = explode('/', ltrim($context->path, '/'));
|
|
|
2577 |
$contextpaths = array();
|
|
|
2578 |
$contextids2 = $contextids;
|
|
|
2579 |
while ($contextids2) {
|
|
|
2580 |
$contextpaths[] = '/' . implode('/', $contextids2);
|
|
|
2581 |
array_pop($contextids2);
|
|
|
2582 |
}
|
|
|
2583 |
return array($contextids, $contextpaths);
|
|
|
2584 |
}
|
|
|
2585 |
|
|
|
2586 |
/**
|
|
|
2587 |
* Check if context is the front page context or a context inside it
|
|
|
2588 |
*
|
|
|
2589 |
* Returns true if this context is the front page context, or a context inside it,
|
|
|
2590 |
* otherwise false.
|
|
|
2591 |
*
|
|
|
2592 |
* @param context $context a context object.
|
|
|
2593 |
* @return bool
|
|
|
2594 |
*/
|
|
|
2595 |
function is_inside_frontpage(context $context) {
|
|
|
2596 |
$frontpagecontext = context_course::instance(SITEID);
|
|
|
2597 |
return strpos($context->path . '/', $frontpagecontext->path . '/') === 0;
|
|
|
2598 |
}
|
|
|
2599 |
|
|
|
2600 |
/**
|
|
|
2601 |
* Returns capability information (cached)
|
|
|
2602 |
*
|
| 1441 |
ariadna |
2603 |
* @param string $capabilityname the capability name.
|
|
|
2604 |
* @param bool $showdebug if true, will show debugging messages.
|
| 1 |
efrain |
2605 |
* @return ?stdClass object or null if capability not found
|
|
|
2606 |
*/
|
| 1441 |
ariadna |
2607 |
function get_capability_info(string $capabilityname, bool $showdebug = true): ?stdClass {
|
| 1 |
efrain |
2608 |
$caps = get_all_capabilities();
|
|
|
2609 |
|
|
|
2610 |
// Check for deprecated capability.
|
|
|
2611 |
if ($deprecatedinfo = get_deprecated_capability_info($capabilityname)) {
|
|
|
2612 |
if (!empty($deprecatedinfo['replacement'])) {
|
|
|
2613 |
// Let's try again with this capability if it exists.
|
|
|
2614 |
if (isset($caps[$deprecatedinfo['replacement']])) {
|
|
|
2615 |
$capabilityname = $deprecatedinfo['replacement'];
|
|
|
2616 |
} else {
|
| 1441 |
ariadna |
2617 |
if ($showdebug) {
|
|
|
2618 |
debugging("Capability '{$capabilityname}' was supposed to be replaced with ".
|
|
|
2619 |
"'{$deprecatedinfo['replacement']}', which does not exist !");
|
|
|
2620 |
}
|
| 1 |
efrain |
2621 |
}
|
|
|
2622 |
}
|
| 1441 |
ariadna |
2623 |
|
|
|
2624 |
if ($showdebug) {
|
|
|
2625 |
$fullmessage = $deprecatedinfo['fullmessage'];
|
|
|
2626 |
debugging($fullmessage, DEBUG_DEVELOPER);
|
|
|
2627 |
}
|
| 1 |
efrain |
2628 |
}
|
|
|
2629 |
if (!isset($caps[$capabilityname])) {
|
|
|
2630 |
return null;
|
|
|
2631 |
}
|
|
|
2632 |
|
|
|
2633 |
return (object) $caps[$capabilityname];
|
|
|
2634 |
}
|
|
|
2635 |
|
|
|
2636 |
/**
|
|
|
2637 |
* Returns deprecation info for this particular capabilty (cached)
|
|
|
2638 |
*
|
|
|
2639 |
* Do not use this function except in the get_capability_info
|
|
|
2640 |
*
|
|
|
2641 |
* @param string $capabilityname
|
|
|
2642 |
* @return array|null with deprecation message and potential replacement if not null
|
|
|
2643 |
*/
|
|
|
2644 |
function get_deprecated_capability_info($capabilityname) {
|
|
|
2645 |
$cache = cache::make('core', 'capabilities');
|
|
|
2646 |
$alldeprecatedcaps = $cache->get('deprecated_capabilities');
|
|
|
2647 |
if ($alldeprecatedcaps === false) {
|
|
|
2648 |
// Look for deprecated capabilities in each component.
|
|
|
2649 |
$allcaps = get_all_capabilities();
|
|
|
2650 |
$components = [];
|
|
|
2651 |
$alldeprecatedcaps = [];
|
|
|
2652 |
foreach ($allcaps as $cap) {
|
|
|
2653 |
if (!in_array($cap['component'], $components)) {
|
|
|
2654 |
$components[] = $cap['component'];
|
| 1441 |
ariadna |
2655 |
|
|
|
2656 |
$componentdir = core_component::get_component_directory($cap['component']);
|
|
|
2657 |
if ($componentdir === null) {
|
|
|
2658 |
continue;
|
|
|
2659 |
}
|
|
|
2660 |
|
|
|
2661 |
$defpath = "{$componentdir}/db/access.php";
|
| 1 |
efrain |
2662 |
if (file_exists($defpath)) {
|
|
|
2663 |
$deprecatedcapabilities = [];
|
|
|
2664 |
require($defpath);
|
|
|
2665 |
if (!empty($deprecatedcapabilities)) {
|
|
|
2666 |
foreach ($deprecatedcapabilities as $cname => $cdef) {
|
|
|
2667 |
$alldeprecatedcaps[$cname] = $cdef;
|
|
|
2668 |
}
|
|
|
2669 |
}
|
|
|
2670 |
}
|
|
|
2671 |
}
|
|
|
2672 |
}
|
|
|
2673 |
$cache->set('deprecated_capabilities', $alldeprecatedcaps);
|
|
|
2674 |
}
|
|
|
2675 |
|
|
|
2676 |
if (!isset($alldeprecatedcaps[$capabilityname])) {
|
|
|
2677 |
return null;
|
|
|
2678 |
}
|
|
|
2679 |
$deprecatedinfo = $alldeprecatedcaps[$capabilityname];
|
|
|
2680 |
$deprecatedinfo['fullmessage'] = "The capability '{$capabilityname}' is deprecated.";
|
|
|
2681 |
if (!empty($deprecatedinfo['message'])) {
|
|
|
2682 |
$deprecatedinfo['fullmessage'] .= $deprecatedinfo['message'];
|
|
|
2683 |
}
|
|
|
2684 |
if (!empty($deprecatedinfo['replacement'])) {
|
|
|
2685 |
$deprecatedinfo['fullmessage'] .=
|
|
|
2686 |
"It will be replaced by '{$deprecatedinfo['replacement']}'.";
|
|
|
2687 |
}
|
|
|
2688 |
return $deprecatedinfo;
|
|
|
2689 |
}
|
|
|
2690 |
|
|
|
2691 |
/**
|
|
|
2692 |
* Returns all capabilitiy records, preferably from MUC and not database.
|
|
|
2693 |
*
|
|
|
2694 |
* @return array All capability records indexed by capability name
|
|
|
2695 |
*/
|
|
|
2696 |
function get_all_capabilities() {
|
|
|
2697 |
global $DB;
|
|
|
2698 |
$cache = cache::make('core', 'capabilities');
|
|
|
2699 |
if (!$allcaps = $cache->get('core_capabilities')) {
|
|
|
2700 |
$rs = $DB->get_recordset('capabilities');
|
|
|
2701 |
$allcaps = array();
|
|
|
2702 |
foreach ($rs as $capability) {
|
|
|
2703 |
$capability->riskbitmask = (int) $capability->riskbitmask;
|
|
|
2704 |
$allcaps[$capability->name] = (array) $capability;
|
|
|
2705 |
}
|
|
|
2706 |
$rs->close();
|
|
|
2707 |
$cache->set('core_capabilities', $allcaps);
|
|
|
2708 |
}
|
|
|
2709 |
return $allcaps;
|
|
|
2710 |
}
|
|
|
2711 |
|
|
|
2712 |
/**
|
|
|
2713 |
* Returns the human-readable, translated version of the capability.
|
|
|
2714 |
* Basically a big switch statement.
|
|
|
2715 |
*
|
|
|
2716 |
* @param string $capabilityname e.g. mod/choice:readresponses
|
|
|
2717 |
* @return string
|
|
|
2718 |
*/
|
|
|
2719 |
function get_capability_string($capabilityname) {
|
|
|
2720 |
|
|
|
2721 |
// Typical capability name is 'plugintype/pluginname:capabilityname'
|
|
|
2722 |
list($type, $name, $capname) = preg_split('|[/:]|', $capabilityname);
|
|
|
2723 |
|
|
|
2724 |
if ($type === 'moodle') {
|
|
|
2725 |
$component = 'core_role';
|
|
|
2726 |
} else if ($type === 'quizreport') {
|
|
|
2727 |
//ugly hack!!
|
|
|
2728 |
$component = 'quiz_'.$name;
|
|
|
2729 |
} else {
|
|
|
2730 |
$component = $type.'_'.$name;
|
|
|
2731 |
}
|
|
|
2732 |
|
|
|
2733 |
$stringname = $name.':'.$capname;
|
|
|
2734 |
|
|
|
2735 |
if ($component === 'core_role' or get_string_manager()->string_exists($stringname, $component)) {
|
|
|
2736 |
return get_string($stringname, $component);
|
|
|
2737 |
}
|
|
|
2738 |
|
|
|
2739 |
$dir = core_component::get_component_directory($component);
|
|
|
2740 |
if (!isset($dir) || !file_exists($dir)) {
|
|
|
2741 |
// plugin broken or does not exist, do not bother with printing of debug message
|
|
|
2742 |
return $capabilityname.' ???';
|
|
|
2743 |
}
|
|
|
2744 |
|
|
|
2745 |
// something is wrong in plugin, better print debug
|
|
|
2746 |
return get_string($stringname, $component);
|
|
|
2747 |
}
|
|
|
2748 |
|
|
|
2749 |
/**
|
|
|
2750 |
* This gets the mod/block/course/core etc strings.
|
|
|
2751 |
*
|
|
|
2752 |
* @param string $component
|
|
|
2753 |
* @param int $contextlevel
|
|
|
2754 |
* @return string|bool String is success, false if failed
|
|
|
2755 |
*/
|
|
|
2756 |
function get_component_string($component, $contextlevel) {
|
|
|
2757 |
|
|
|
2758 |
if ($component === 'moodle' || $component === 'core') {
|
|
|
2759 |
return context_helper::get_level_name($contextlevel);
|
|
|
2760 |
}
|
|
|
2761 |
|
|
|
2762 |
list($type, $name) = core_component::normalize_component($component);
|
|
|
2763 |
$dir = core_component::get_plugin_directory($type, $name);
|
|
|
2764 |
if (!isset($dir) || !file_exists($dir)) {
|
|
|
2765 |
// plugin not installed, bad luck, there is no way to find the name
|
|
|
2766 |
return $component . ' ???';
|
|
|
2767 |
}
|
|
|
2768 |
|
|
|
2769 |
// Some plugin types need an extra prefix to make the name easy to understand.
|
|
|
2770 |
switch ($type) {
|
|
|
2771 |
case 'quiz':
|
|
|
2772 |
$prefix = get_string('quizreport', 'quiz') . ': ';
|
|
|
2773 |
break;
|
|
|
2774 |
case 'repository':
|
|
|
2775 |
$prefix = get_string('repository', 'repository') . ': ';
|
|
|
2776 |
break;
|
|
|
2777 |
case 'gradeimport':
|
|
|
2778 |
$prefix = get_string('gradeimport', 'grades') . ': ';
|
|
|
2779 |
break;
|
|
|
2780 |
case 'gradeexport':
|
|
|
2781 |
$prefix = get_string('gradeexport', 'grades') . ': ';
|
|
|
2782 |
break;
|
|
|
2783 |
case 'gradereport':
|
|
|
2784 |
$prefix = get_string('gradereport', 'grades') . ': ';
|
|
|
2785 |
break;
|
|
|
2786 |
case 'webservice':
|
|
|
2787 |
$prefix = get_string('webservice', 'webservice') . ': ';
|
|
|
2788 |
break;
|
|
|
2789 |
case 'block':
|
|
|
2790 |
$prefix = get_string('block') . ': ';
|
|
|
2791 |
break;
|
|
|
2792 |
case 'mod':
|
|
|
2793 |
$prefix = get_string('activity') . ': ';
|
|
|
2794 |
break;
|
|
|
2795 |
|
|
|
2796 |
// Default case, just use the plugin name.
|
|
|
2797 |
default:
|
|
|
2798 |
$prefix = '';
|
|
|
2799 |
}
|
|
|
2800 |
return $prefix . get_string('pluginname', $component);
|
|
|
2801 |
}
|
|
|
2802 |
|
|
|
2803 |
/**
|
|
|
2804 |
* Gets the list of roles assigned to this context and up (parents)
|
|
|
2805 |
* from the aggregation of:
|
|
|
2806 |
* a) the list of roles that are visible on user profile page and participants page (profileroles setting) and;
|
|
|
2807 |
* b) if applicable, those roles that are assigned in the context.
|
|
|
2808 |
*
|
|
|
2809 |
* @param context $context
|
|
|
2810 |
* @return array
|
|
|
2811 |
*/
|
|
|
2812 |
function get_profile_roles(context $context) {
|
|
|
2813 |
global $CFG, $DB;
|
|
|
2814 |
// If the current user can assign roles, then they can see all roles on the profile and participants page,
|
|
|
2815 |
// provided the roles are assigned to at least 1 user in the context. If not, only the policy-defined roles.
|
|
|
2816 |
if (has_capability('moodle/role:assign', $context)) {
|
|
|
2817 |
$rolesinscope = array_keys(get_all_roles($context));
|
|
|
2818 |
} else {
|
|
|
2819 |
$rolesinscope = empty($CFG->profileroles) ? [] : array_map('trim', explode(',', $CFG->profileroles));
|
|
|
2820 |
}
|
|
|
2821 |
|
|
|
2822 |
if (empty($rolesinscope)) {
|
|
|
2823 |
return [];
|
|
|
2824 |
}
|
|
|
2825 |
|
|
|
2826 |
list($rallowed, $params) = $DB->get_in_or_equal($rolesinscope, SQL_PARAMS_NAMED, 'a');
|
|
|
2827 |
list($contextlist, $cparams) = $DB->get_in_or_equal($context->get_parent_context_ids(true), SQL_PARAMS_NAMED, 'p');
|
|
|
2828 |
$params = array_merge($params, $cparams);
|
|
|
2829 |
|
|
|
2830 |
if ($coursecontext = $context->get_course_context(false)) {
|
|
|
2831 |
$params['coursecontext'] = $coursecontext->id;
|
|
|
2832 |
} else {
|
|
|
2833 |
$params['coursecontext'] = 0;
|
|
|
2834 |
}
|
|
|
2835 |
|
|
|
2836 |
$sql = "SELECT DISTINCT r.id, r.name, r.shortname, r.sortorder, rn.name AS coursealias
|
|
|
2837 |
FROM {role_assignments} ra, {role} r
|
|
|
2838 |
LEFT JOIN {role_names} rn ON (rn.contextid = :coursecontext AND rn.roleid = r.id)
|
|
|
2839 |
WHERE r.id = ra.roleid
|
|
|
2840 |
AND ra.contextid $contextlist
|
|
|
2841 |
AND r.id $rallowed
|
|
|
2842 |
ORDER BY r.sortorder ASC";
|
|
|
2843 |
|
|
|
2844 |
return $DB->get_records_sql($sql, $params);
|
|
|
2845 |
}
|
|
|
2846 |
|
|
|
2847 |
/**
|
|
|
2848 |
* Gets the list of roles assigned to this context and up (parents)
|
|
|
2849 |
*
|
|
|
2850 |
* @param context $context
|
|
|
2851 |
* @param boolean $includeparents, false means without parents.
|
|
|
2852 |
* @return array
|
|
|
2853 |
*/
|
|
|
2854 |
function get_roles_used_in_context(context $context, $includeparents = true) {
|
|
|
2855 |
global $DB;
|
|
|
2856 |
|
|
|
2857 |
if ($includeparents === true) {
|
|
|
2858 |
list($contextlist, $params) = $DB->get_in_or_equal($context->get_parent_context_ids(true), SQL_PARAMS_NAMED, 'cl');
|
|
|
2859 |
} else {
|
|
|
2860 |
list($contextlist, $params) = $DB->get_in_or_equal($context->id, SQL_PARAMS_NAMED, 'cl');
|
|
|
2861 |
}
|
|
|
2862 |
|
|
|
2863 |
if ($coursecontext = $context->get_course_context(false)) {
|
|
|
2864 |
$params['coursecontext'] = $coursecontext->id;
|
|
|
2865 |
} else {
|
|
|
2866 |
$params['coursecontext'] = 0;
|
|
|
2867 |
}
|
|
|
2868 |
|
|
|
2869 |
$sql = "SELECT DISTINCT r.id, r.name, r.shortname, r.sortorder, rn.name AS coursealias
|
|
|
2870 |
FROM {role_assignments} ra, {role} r
|
|
|
2871 |
LEFT JOIN {role_names} rn ON (rn.contextid = :coursecontext AND rn.roleid = r.id)
|
|
|
2872 |
WHERE r.id = ra.roleid
|
|
|
2873 |
AND ra.contextid $contextlist
|
|
|
2874 |
ORDER BY r.sortorder ASC";
|
|
|
2875 |
|
|
|
2876 |
return $DB->get_records_sql($sql, $params);
|
|
|
2877 |
}
|
|
|
2878 |
|
|
|
2879 |
/**
|
|
|
2880 |
* This function is used to print roles column in user profile page.
|
|
|
2881 |
* It is using the CFG->profileroles to limit the list to only interesting roles.
|
|
|
2882 |
* (The permission tab has full details of user role assignments.)
|
|
|
2883 |
*
|
|
|
2884 |
* @param int $userid
|
|
|
2885 |
* @param int $courseid
|
|
|
2886 |
* @return string
|
|
|
2887 |
*/
|
|
|
2888 |
function get_user_roles_in_course($userid, $courseid) {
|
|
|
2889 |
global $CFG, $DB;
|
|
|
2890 |
if ($courseid == SITEID) {
|
|
|
2891 |
$context = context_system::instance();
|
|
|
2892 |
} else {
|
|
|
2893 |
$context = context_course::instance($courseid);
|
|
|
2894 |
}
|
|
|
2895 |
// If the current user can assign roles, then they can see all roles on the profile and participants page,
|
|
|
2896 |
// provided the roles are assigned to at least 1 user in the context. If not, only the policy-defined roles.
|
|
|
2897 |
if (has_capability('moodle/role:assign', $context)) {
|
|
|
2898 |
$rolesinscope = array_keys(get_all_roles($context));
|
|
|
2899 |
} else {
|
|
|
2900 |
$rolesinscope = empty($CFG->profileroles) ? [] : array_map('trim', explode(',', $CFG->profileroles));
|
|
|
2901 |
}
|
|
|
2902 |
if (empty($rolesinscope)) {
|
|
|
2903 |
return '';
|
|
|
2904 |
}
|
|
|
2905 |
|
|
|
2906 |
list($rallowed, $params) = $DB->get_in_or_equal($rolesinscope, SQL_PARAMS_NAMED, 'a');
|
|
|
2907 |
list($contextlist, $cparams) = $DB->get_in_or_equal($context->get_parent_context_ids(true), SQL_PARAMS_NAMED, 'p');
|
|
|
2908 |
$params = array_merge($params, $cparams);
|
|
|
2909 |
|
|
|
2910 |
if ($coursecontext = $context->get_course_context(false)) {
|
|
|
2911 |
$params['coursecontext'] = $coursecontext->id;
|
|
|
2912 |
} else {
|
|
|
2913 |
$params['coursecontext'] = 0;
|
|
|
2914 |
}
|
|
|
2915 |
|
|
|
2916 |
$sql = "SELECT DISTINCT r.id, r.name, r.shortname, r.sortorder, rn.name AS coursealias
|
|
|
2917 |
FROM {role_assignments} ra, {role} r
|
|
|
2918 |
LEFT JOIN {role_names} rn ON (rn.contextid = :coursecontext AND rn.roleid = r.id)
|
|
|
2919 |
WHERE r.id = ra.roleid
|
|
|
2920 |
AND ra.contextid $contextlist
|
|
|
2921 |
AND r.id $rallowed
|
|
|
2922 |
AND ra.userid = :userid
|
|
|
2923 |
ORDER BY r.sortorder ASC";
|
|
|
2924 |
$params['userid'] = $userid;
|
|
|
2925 |
|
|
|
2926 |
$rolestring = '';
|
|
|
2927 |
|
|
|
2928 |
if ($roles = $DB->get_records_sql($sql, $params)) {
|
|
|
2929 |
$viewableroles = get_viewable_roles($context, $userid);
|
|
|
2930 |
|
|
|
2931 |
$rolenames = array();
|
|
|
2932 |
foreach ($roles as $roleid => $unused) {
|
|
|
2933 |
if (isset($viewableroles[$roleid])) {
|
|
|
2934 |
$url = new moodle_url('/user/index.php', ['contextid' => $context->id, 'roleid' => $roleid]);
|
|
|
2935 |
$rolenames[] = '<a href="' . $url . '">' . $viewableroles[$roleid] . '</a>';
|
|
|
2936 |
}
|
|
|
2937 |
}
|
|
|
2938 |
$rolestring = implode(', ', $rolenames);
|
|
|
2939 |
}
|
|
|
2940 |
|
|
|
2941 |
return $rolestring;
|
|
|
2942 |
}
|
|
|
2943 |
|
|
|
2944 |
/**
|
|
|
2945 |
* Checks if a user can assign users to a particular role in this context
|
|
|
2946 |
*
|
|
|
2947 |
* @param context $context
|
|
|
2948 |
* @param int $targetroleid - the id of the role you want to assign users to
|
|
|
2949 |
* @return boolean
|
|
|
2950 |
*/
|
|
|
2951 |
function user_can_assign(context $context, $targetroleid) {
|
|
|
2952 |
global $DB;
|
|
|
2953 |
|
|
|
2954 |
// First check to see if the user is a site administrator.
|
|
|
2955 |
if (is_siteadmin()) {
|
|
|
2956 |
return true;
|
|
|
2957 |
}
|
|
|
2958 |
|
|
|
2959 |
// Check if user has override capability.
|
|
|
2960 |
// If not return false.
|
|
|
2961 |
if (!has_capability('moodle/role:assign', $context)) {
|
|
|
2962 |
return false;
|
|
|
2963 |
}
|
|
|
2964 |
// pull out all active roles of this user from this context(or above)
|
|
|
2965 |
if ($userroles = get_user_roles($context)) {
|
|
|
2966 |
foreach ($userroles as $userrole) {
|
|
|
2967 |
// if any in the role_allow_override table, then it's ok
|
|
|
2968 |
if ($DB->get_record('role_allow_assign', array('roleid'=>$userrole->roleid, 'allowassign'=>$targetroleid))) {
|
|
|
2969 |
return true;
|
|
|
2970 |
}
|
|
|
2971 |
}
|
|
|
2972 |
}
|
|
|
2973 |
|
|
|
2974 |
return false;
|
|
|
2975 |
}
|
|
|
2976 |
|
|
|
2977 |
/**
|
|
|
2978 |
* Returns all site roles in correct sort order.
|
|
|
2979 |
*
|
|
|
2980 |
* Note: this method does not localise role names or descriptions,
|
|
|
2981 |
* use role_get_names() if you need role names.
|
|
|
2982 |
*
|
|
|
2983 |
* @param context $context optional context for course role name aliases
|
|
|
2984 |
* @return array of role records with optional coursealias property
|
|
|
2985 |
*/
|
| 1441 |
ariadna |
2986 |
function get_all_roles(?context $context = null) {
|
| 1 |
efrain |
2987 |
global $DB;
|
|
|
2988 |
|
|
|
2989 |
if (!$context or !$coursecontext = $context->get_course_context(false)) {
|
|
|
2990 |
$coursecontext = null;
|
|
|
2991 |
}
|
|
|
2992 |
|
|
|
2993 |
if ($coursecontext) {
|
|
|
2994 |
$sql = "SELECT r.*, rn.name AS coursealias
|
|
|
2995 |
FROM {role} r
|
|
|
2996 |
LEFT JOIN {role_names} rn ON (rn.contextid = :coursecontext AND rn.roleid = r.id)
|
|
|
2997 |
ORDER BY r.sortorder ASC";
|
|
|
2998 |
return $DB->get_records_sql($sql, array('coursecontext'=>$coursecontext->id));
|
|
|
2999 |
|
|
|
3000 |
} else {
|
|
|
3001 |
return $DB->get_records('role', array(), 'sortorder ASC');
|
|
|
3002 |
}
|
|
|
3003 |
}
|
|
|
3004 |
|
|
|
3005 |
/**
|
|
|
3006 |
* Returns roles of a specified archetype
|
|
|
3007 |
*
|
|
|
3008 |
* @param string $archetype
|
|
|
3009 |
* @return array of full role records
|
|
|
3010 |
*/
|
|
|
3011 |
function get_archetype_roles($archetype) {
|
|
|
3012 |
global $DB;
|
|
|
3013 |
return $DB->get_records('role', array('archetype'=>$archetype), 'sortorder ASC');
|
|
|
3014 |
}
|
|
|
3015 |
|
|
|
3016 |
/**
|
|
|
3017 |
* Gets all the user roles assigned in this context, or higher contexts for a list of users.
|
|
|
3018 |
*
|
|
|
3019 |
* If you try using the combination $userids = [], $checkparentcontexts = true then this is likely
|
|
|
3020 |
* to cause an out-of-memory error on large Moodle sites, so this combination is deprecated and
|
|
|
3021 |
* outputs a warning, even though it is the default.
|
|
|
3022 |
*
|
|
|
3023 |
* @param context $context
|
|
|
3024 |
* @param array $userids. An empty list means fetch all role assignments for the context.
|
|
|
3025 |
* @param bool $checkparentcontexts defaults to true
|
|
|
3026 |
* @param string $order defaults to 'c.contextlevel DESC, r.sortorder ASC'
|
|
|
3027 |
* @return array
|
|
|
3028 |
*/
|
|
|
3029 |
function get_users_roles(context $context, $userids = [], $checkparentcontexts = true, $order = 'c.contextlevel DESC, r.sortorder ASC') {
|
|
|
3030 |
global $DB;
|
|
|
3031 |
|
|
|
3032 |
if (!$userids && $checkparentcontexts) {
|
|
|
3033 |
debugging('Please do not call get_users_roles() with $checkparentcontexts = true ' .
|
|
|
3034 |
'and $userids array not set. This combination causes large Moodle sites ' .
|
|
|
3035 |
'with lots of site-wide role assignemnts to run out of memory.', DEBUG_DEVELOPER);
|
|
|
3036 |
}
|
|
|
3037 |
|
|
|
3038 |
if ($checkparentcontexts) {
|
|
|
3039 |
$contextids = $context->get_parent_context_ids();
|
|
|
3040 |
} else {
|
|
|
3041 |
$contextids = array();
|
|
|
3042 |
}
|
|
|
3043 |
$contextids[] = $context->id;
|
|
|
3044 |
|
|
|
3045 |
list($contextids, $params) = $DB->get_in_or_equal($contextids, SQL_PARAMS_NAMED, 'con');
|
|
|
3046 |
|
|
|
3047 |
// If userids was passed as an empty array, we fetch all role assignments for the course.
|
|
|
3048 |
if (empty($userids)) {
|
|
|
3049 |
$useridlist = ' IS NOT NULL ';
|
|
|
3050 |
$uparams = [];
|
|
|
3051 |
} else {
|
|
|
3052 |
list($useridlist, $uparams) = $DB->get_in_or_equal($userids, SQL_PARAMS_NAMED, 'uids');
|
|
|
3053 |
}
|
|
|
3054 |
|
|
|
3055 |
$sql = "SELECT ra.*, r.name, r.shortname, ra.userid
|
|
|
3056 |
FROM {role_assignments} ra, {role} r, {context} c
|
|
|
3057 |
WHERE ra.userid $useridlist
|
|
|
3058 |
AND ra.roleid = r.id
|
|
|
3059 |
AND ra.contextid = c.id
|
|
|
3060 |
AND ra.contextid $contextids
|
|
|
3061 |
ORDER BY $order";
|
|
|
3062 |
|
|
|
3063 |
$all = $DB->get_records_sql($sql , array_merge($params, $uparams));
|
|
|
3064 |
|
|
|
3065 |
// Return results grouped by userid.
|
|
|
3066 |
$result = [];
|
|
|
3067 |
foreach ($all as $id => $record) {
|
|
|
3068 |
if (!isset($result[$record->userid])) {
|
|
|
3069 |
$result[$record->userid] = [];
|
|
|
3070 |
}
|
|
|
3071 |
$result[$record->userid][$record->id] = $record;
|
|
|
3072 |
}
|
|
|
3073 |
|
|
|
3074 |
// Make sure all requested users are included in the result, even if they had no role assignments.
|
|
|
3075 |
foreach ($userids as $id) {
|
|
|
3076 |
if (!isset($result[$id])) {
|
|
|
3077 |
$result[$id] = [];
|
|
|
3078 |
}
|
|
|
3079 |
}
|
|
|
3080 |
|
|
|
3081 |
return $result;
|
|
|
3082 |
}
|
|
|
3083 |
|
|
|
3084 |
|
|
|
3085 |
/**
|
|
|
3086 |
* Gets all the user roles assigned in this context, or higher contexts
|
|
|
3087 |
* this is mainly used when checking if a user can assign a role, or overriding a role
|
|
|
3088 |
* i.e. we need to know what this user holds, in order to verify against allow_assign and
|
|
|
3089 |
* allow_override tables
|
|
|
3090 |
*
|
|
|
3091 |
* @param context $context
|
|
|
3092 |
* @param int $userid
|
|
|
3093 |
* @param bool $checkparentcontexts defaults to true
|
|
|
3094 |
* @param string $order defaults to 'c.contextlevel DESC, r.sortorder ASC'
|
|
|
3095 |
* @return array
|
|
|
3096 |
*/
|
|
|
3097 |
function get_user_roles(context $context, $userid = 0, $checkparentcontexts = true, $order = 'c.contextlevel DESC, r.sortorder ASC') {
|
|
|
3098 |
global $USER, $DB;
|
|
|
3099 |
|
|
|
3100 |
if (empty($userid)) {
|
|
|
3101 |
if (empty($USER->id)) {
|
|
|
3102 |
return array();
|
|
|
3103 |
}
|
|
|
3104 |
$userid = $USER->id;
|
|
|
3105 |
}
|
|
|
3106 |
|
|
|
3107 |
if ($checkparentcontexts) {
|
|
|
3108 |
$contextids = $context->get_parent_context_ids();
|
|
|
3109 |
} else {
|
|
|
3110 |
$contextids = array();
|
|
|
3111 |
}
|
|
|
3112 |
$contextids[] = $context->id;
|
|
|
3113 |
|
|
|
3114 |
list($contextids, $params) = $DB->get_in_or_equal($contextids, SQL_PARAMS_QM);
|
|
|
3115 |
|
|
|
3116 |
array_unshift($params, $userid);
|
|
|
3117 |
|
|
|
3118 |
$sql = "SELECT ra.*, r.name, r.shortname
|
|
|
3119 |
FROM {role_assignments} ra, {role} r, {context} c
|
|
|
3120 |
WHERE ra.userid = ?
|
|
|
3121 |
AND ra.roleid = r.id
|
|
|
3122 |
AND ra.contextid = c.id
|
|
|
3123 |
AND ra.contextid $contextids
|
|
|
3124 |
ORDER BY $order";
|
|
|
3125 |
|
|
|
3126 |
return $DB->get_records_sql($sql ,$params);
|
|
|
3127 |
}
|
|
|
3128 |
|
|
|
3129 |
/**
|
|
|
3130 |
* Like get_user_roles, but adds in the authenticated user role, and the front
|
|
|
3131 |
* page roles, if applicable.
|
|
|
3132 |
*
|
|
|
3133 |
* @param context $context the context.
|
|
|
3134 |
* @param int $userid optional. Defaults to $USER->id
|
|
|
3135 |
* @return array of objects with fields ->userid, ->contextid and ->roleid.
|
|
|
3136 |
*/
|
|
|
3137 |
function get_user_roles_with_special(context $context, $userid = 0) {
|
|
|
3138 |
global $CFG, $USER;
|
|
|
3139 |
|
|
|
3140 |
if (empty($userid)) {
|
|
|
3141 |
if (empty($USER->id)) {
|
|
|
3142 |
return array();
|
|
|
3143 |
}
|
|
|
3144 |
$userid = $USER->id;
|
|
|
3145 |
}
|
|
|
3146 |
|
|
|
3147 |
$ras = get_user_roles($context, $userid);
|
|
|
3148 |
|
|
|
3149 |
// Add front-page role if relevant.
|
|
|
3150 |
$defaultfrontpageroleid = isset($CFG->defaultfrontpageroleid) ? $CFG->defaultfrontpageroleid : 0;
|
|
|
3151 |
$isfrontpage = ($context->contextlevel == CONTEXT_COURSE && $context->instanceid == SITEID) ||
|
|
|
3152 |
is_inside_frontpage($context);
|
|
|
3153 |
if ($defaultfrontpageroleid && $isfrontpage) {
|
|
|
3154 |
$frontpagecontext = context_course::instance(SITEID);
|
|
|
3155 |
$ra = new stdClass();
|
|
|
3156 |
$ra->userid = $userid;
|
|
|
3157 |
$ra->contextid = $frontpagecontext->id;
|
|
|
3158 |
$ra->roleid = $defaultfrontpageroleid;
|
|
|
3159 |
$ras[] = $ra;
|
|
|
3160 |
}
|
|
|
3161 |
|
|
|
3162 |
// Add authenticated user role if relevant.
|
|
|
3163 |
$defaultuserroleid = isset($CFG->defaultuserroleid) ? $CFG->defaultuserroleid : 0;
|
|
|
3164 |
if ($defaultuserroleid && !isguestuser($userid)) {
|
|
|
3165 |
$systemcontext = context_system::instance();
|
|
|
3166 |
$ra = new stdClass();
|
|
|
3167 |
$ra->userid = $userid;
|
|
|
3168 |
$ra->contextid = $systemcontext->id;
|
|
|
3169 |
$ra->roleid = $defaultuserroleid;
|
|
|
3170 |
$ras[] = $ra;
|
|
|
3171 |
}
|
|
|
3172 |
|
|
|
3173 |
return $ras;
|
|
|
3174 |
}
|
|
|
3175 |
|
|
|
3176 |
/**
|
|
|
3177 |
* Creates a record in the role_allow_override table
|
|
|
3178 |
*
|
|
|
3179 |
* @param int $fromroleid source roleid
|
|
|
3180 |
* @param int $targetroleid target roleid
|
|
|
3181 |
* @return void
|
|
|
3182 |
*/
|
|
|
3183 |
function core_role_set_override_allowed($fromroleid, $targetroleid) {
|
|
|
3184 |
global $DB;
|
|
|
3185 |
|
|
|
3186 |
$record = new stdClass();
|
|
|
3187 |
$record->roleid = $fromroleid;
|
|
|
3188 |
$record->allowoverride = $targetroleid;
|
|
|
3189 |
$DB->insert_record('role_allow_override', $record);
|
|
|
3190 |
}
|
|
|
3191 |
|
|
|
3192 |
/**
|
|
|
3193 |
* Creates a record in the role_allow_assign table
|
|
|
3194 |
*
|
|
|
3195 |
* @param int $fromroleid source roleid
|
|
|
3196 |
* @param int $targetroleid target roleid
|
|
|
3197 |
* @return void
|
|
|
3198 |
*/
|
|
|
3199 |
function core_role_set_assign_allowed($fromroleid, $targetroleid) {
|
|
|
3200 |
global $DB;
|
|
|
3201 |
|
|
|
3202 |
$record = new stdClass();
|
|
|
3203 |
$record->roleid = $fromroleid;
|
|
|
3204 |
$record->allowassign = $targetroleid;
|
|
|
3205 |
$DB->insert_record('role_allow_assign', $record);
|
|
|
3206 |
}
|
|
|
3207 |
|
|
|
3208 |
/**
|
|
|
3209 |
* Creates a record in the role_allow_switch table
|
|
|
3210 |
*
|
|
|
3211 |
* @param int $fromroleid source roleid
|
|
|
3212 |
* @param int $targetroleid target roleid
|
|
|
3213 |
* @return void
|
|
|
3214 |
*/
|
|
|
3215 |
function core_role_set_switch_allowed($fromroleid, $targetroleid) {
|
|
|
3216 |
global $DB;
|
|
|
3217 |
|
|
|
3218 |
$record = new stdClass();
|
|
|
3219 |
$record->roleid = $fromroleid;
|
|
|
3220 |
$record->allowswitch = $targetroleid;
|
|
|
3221 |
$DB->insert_record('role_allow_switch', $record);
|
|
|
3222 |
}
|
|
|
3223 |
|
|
|
3224 |
/**
|
|
|
3225 |
* Creates a record in the role_allow_view table
|
|
|
3226 |
*
|
|
|
3227 |
* @param int $fromroleid source roleid
|
|
|
3228 |
* @param int $targetroleid target roleid
|
|
|
3229 |
* @return void
|
|
|
3230 |
*/
|
|
|
3231 |
function core_role_set_view_allowed($fromroleid, $targetroleid) {
|
|
|
3232 |
global $DB;
|
|
|
3233 |
|
|
|
3234 |
$record = new stdClass();
|
|
|
3235 |
$record->roleid = $fromroleid;
|
|
|
3236 |
$record->allowview = $targetroleid;
|
|
|
3237 |
$DB->insert_record('role_allow_view', $record);
|
|
|
3238 |
}
|
|
|
3239 |
|
|
|
3240 |
/**
|
|
|
3241 |
* Gets a list of roles that this user can assign in this context
|
|
|
3242 |
*
|
|
|
3243 |
* @param context $context the context.
|
|
|
3244 |
* @param int $rolenamedisplay the type of role name to display. One of the
|
|
|
3245 |
* ROLENAME_X constants. Default ROLENAME_ALIAS.
|
|
|
3246 |
* @param bool $withusercounts if true, count the number of users with each role.
|
|
|
3247 |
* @param integer|object $user A user id or object. By default (null) checks the permissions of the current user.
|
|
|
3248 |
* @return array if $withusercounts is false, then an array $roleid => $rolename.
|
|
|
3249 |
* if $withusercounts is true, returns a list of three arrays,
|
|
|
3250 |
* $rolenames, $rolecounts, and $nameswithcounts.
|
|
|
3251 |
*/
|
|
|
3252 |
function get_assignable_roles(context $context, $rolenamedisplay = ROLENAME_ALIAS, $withusercounts = false, $user = null) {
|
|
|
3253 |
global $USER, $DB;
|
|
|
3254 |
|
|
|
3255 |
// make sure there is a real user specified
|
|
|
3256 |
if ($user === null) {
|
|
|
3257 |
$userid = isset($USER->id) ? $USER->id : 0;
|
|
|
3258 |
} else {
|
|
|
3259 |
$userid = is_object($user) ? $user->id : $user;
|
|
|
3260 |
}
|
|
|
3261 |
|
|
|
3262 |
if (!has_capability('moodle/role:assign', $context, $userid)) {
|
|
|
3263 |
if ($withusercounts) {
|
|
|
3264 |
return array(array(), array(), array());
|
|
|
3265 |
} else {
|
|
|
3266 |
return array();
|
|
|
3267 |
}
|
|
|
3268 |
}
|
|
|
3269 |
|
|
|
3270 |
$params = array();
|
|
|
3271 |
$extrafields = '';
|
|
|
3272 |
|
|
|
3273 |
if ($withusercounts) {
|
|
|
3274 |
$extrafields = ', (SELECT COUNT(DISTINCT u.id)
|
|
|
3275 |
FROM {role_assignments} cra JOIN {user} u ON cra.userid = u.id
|
|
|
3276 |
WHERE cra.roleid = r.id AND cra.contextid = :conid AND u.deleted = 0
|
|
|
3277 |
) AS usercount';
|
|
|
3278 |
$params['conid'] = $context->id;
|
|
|
3279 |
}
|
|
|
3280 |
|
|
|
3281 |
if (is_siteadmin($userid)) {
|
|
|
3282 |
// show all roles allowed in this context to admins
|
|
|
3283 |
$assignrestriction = "";
|
|
|
3284 |
} else {
|
|
|
3285 |
$parents = $context->get_parent_context_ids(true);
|
|
|
3286 |
$contexts = implode(',' , $parents);
|
|
|
3287 |
$assignrestriction = "JOIN (SELECT DISTINCT raa.allowassign AS id
|
|
|
3288 |
FROM {role_allow_assign} raa
|
|
|
3289 |
JOIN {role_assignments} ra ON ra.roleid = raa.roleid
|
|
|
3290 |
WHERE ra.userid = :userid AND ra.contextid IN ($contexts)
|
|
|
3291 |
) ar ON ar.id = r.id";
|
|
|
3292 |
$params['userid'] = $userid;
|
|
|
3293 |
}
|
|
|
3294 |
$params['contextlevel'] = $context->contextlevel;
|
|
|
3295 |
|
|
|
3296 |
if ($coursecontext = $context->get_course_context(false)) {
|
|
|
3297 |
$params['coursecontext'] = $coursecontext->id;
|
|
|
3298 |
} else {
|
|
|
3299 |
$params['coursecontext'] = 0; // no course aliases
|
|
|
3300 |
$coursecontext = null;
|
|
|
3301 |
}
|
|
|
3302 |
$sql = "SELECT r.id, r.name, r.shortname, rn.name AS coursealias $extrafields
|
|
|
3303 |
FROM {role} r
|
|
|
3304 |
$assignrestriction
|
|
|
3305 |
JOIN {role_context_levels} rcl ON (rcl.contextlevel = :contextlevel AND r.id = rcl.roleid)
|
|
|
3306 |
LEFT JOIN {role_names} rn ON (rn.contextid = :coursecontext AND rn.roleid = r.id)
|
|
|
3307 |
ORDER BY r.sortorder ASC";
|
|
|
3308 |
$roles = $DB->get_records_sql($sql, $params);
|
|
|
3309 |
|
|
|
3310 |
$rolenames = role_fix_names($roles, $coursecontext, $rolenamedisplay, true);
|
|
|
3311 |
|
|
|
3312 |
if (!$withusercounts) {
|
|
|
3313 |
return $rolenames;
|
|
|
3314 |
}
|
|
|
3315 |
|
|
|
3316 |
$rolecounts = array();
|
|
|
3317 |
$nameswithcounts = array();
|
|
|
3318 |
foreach ($roles as $role) {
|
|
|
3319 |
$nameswithcounts[$role->id] = $rolenames[$role->id] . ' (' . $roles[$role->id]->usercount . ')';
|
|
|
3320 |
$rolecounts[$role->id] = $roles[$role->id]->usercount;
|
|
|
3321 |
}
|
|
|
3322 |
return array($rolenames, $rolecounts, $nameswithcounts);
|
|
|
3323 |
}
|
|
|
3324 |
|
|
|
3325 |
/**
|
|
|
3326 |
* Gets a list of roles that this user can switch to in a context
|
|
|
3327 |
*
|
|
|
3328 |
* Gets a list of roles that this user can switch to in a context, for the switchrole menu.
|
|
|
3329 |
* This function just process the contents of the role_allow_switch table. You also need to
|
|
|
3330 |
* test the moodle/role:switchroles to see if the user is allowed to switch in the first place.
|
|
|
3331 |
*
|
|
|
3332 |
* @param context $context a context.
|
|
|
3333 |
* @param int $rolenamedisplay the type of role name to display. One of the
|
|
|
3334 |
* ROLENAME_X constants. Default ROLENAME_ALIAS.
|
|
|
3335 |
* @return array an array $roleid => $rolename.
|
|
|
3336 |
*/
|
|
|
3337 |
function get_switchable_roles(context $context, $rolenamedisplay = ROLENAME_ALIAS) {
|
|
|
3338 |
global $USER, $DB;
|
|
|
3339 |
|
|
|
3340 |
// You can't switch roles without this capability.
|
|
|
3341 |
if (!has_capability('moodle/role:switchroles', $context)) {
|
|
|
3342 |
return [];
|
|
|
3343 |
}
|
|
|
3344 |
|
|
|
3345 |
$params = array();
|
|
|
3346 |
$extrajoins = '';
|
|
|
3347 |
$extrawhere = '';
|
|
|
3348 |
if (!is_siteadmin()) {
|
|
|
3349 |
// Admins are allowed to switch to any role with.
|
|
|
3350 |
// Others are subject to the additional constraint that the switch-to role must be allowed by
|
|
|
3351 |
// 'role_allow_switch' for some role they have assigned in this context or any parent.
|
|
|
3352 |
$parents = $context->get_parent_context_ids(true);
|
|
|
3353 |
$contexts = implode(',' , $parents);
|
|
|
3354 |
|
|
|
3355 |
$extrajoins = "JOIN {role_allow_switch} ras ON ras.allowswitch = rc.roleid
|
|
|
3356 |
JOIN {role_assignments} ra ON ra.roleid = ras.roleid";
|
|
|
3357 |
$extrawhere = "WHERE ra.userid = :userid AND ra.contextid IN ($contexts)";
|
|
|
3358 |
$params['userid'] = $USER->id;
|
|
|
3359 |
}
|
|
|
3360 |
|
|
|
3361 |
if ($coursecontext = $context->get_course_context(false)) {
|
|
|
3362 |
$params['coursecontext'] = $coursecontext->id;
|
|
|
3363 |
} else {
|
|
|
3364 |
$params['coursecontext'] = 0; // no course aliases
|
|
|
3365 |
$coursecontext = null;
|
|
|
3366 |
}
|
|
|
3367 |
|
|
|
3368 |
$query = "
|
|
|
3369 |
SELECT r.id, r.name, r.shortname, rn.name AS coursealias
|
|
|
3370 |
FROM (SELECT DISTINCT rc.roleid
|
|
|
3371 |
FROM {role_capabilities} rc
|
|
|
3372 |
|
|
|
3373 |
$extrajoins
|
|
|
3374 |
$extrawhere) idlist
|
|
|
3375 |
JOIN {role} r ON r.id = idlist.roleid
|
|
|
3376 |
LEFT JOIN {role_names} rn ON (rn.contextid = :coursecontext AND rn.roleid = r.id)
|
|
|
3377 |
ORDER BY r.sortorder";
|
|
|
3378 |
$roles = $DB->get_records_sql($query, $params);
|
|
|
3379 |
|
|
|
3380 |
return role_fix_names($roles, $context, $rolenamedisplay, true);
|
|
|
3381 |
}
|
|
|
3382 |
|
|
|
3383 |
/**
|
|
|
3384 |
* Gets a list of roles that this user can view in a context
|
|
|
3385 |
*
|
|
|
3386 |
* @param context $context a context.
|
|
|
3387 |
* @param int $userid id of user.
|
|
|
3388 |
* @param int $rolenamedisplay the type of role name to display. One of the
|
|
|
3389 |
* ROLENAME_X constants. Default ROLENAME_ALIAS.
|
|
|
3390 |
* @return array an array $roleid => $rolename.
|
|
|
3391 |
*/
|
|
|
3392 |
function get_viewable_roles(context $context, $userid = null, $rolenamedisplay = ROLENAME_ALIAS) {
|
|
|
3393 |
global $USER, $DB;
|
|
|
3394 |
|
|
|
3395 |
if ($userid == null) {
|
|
|
3396 |
$userid = $USER->id;
|
|
|
3397 |
}
|
|
|
3398 |
|
|
|
3399 |
$params = array();
|
|
|
3400 |
$extrajoins = '';
|
|
|
3401 |
$extrawhere = '';
|
|
|
3402 |
if (!is_siteadmin()) {
|
|
|
3403 |
// Admins are allowed to view any role.
|
|
|
3404 |
// Others are subject to the additional constraint that the view role must be allowed by
|
|
|
3405 |
// 'role_allow_view' for some role they have assigned in this context or any parent.
|
|
|
3406 |
$contexts = $context->get_parent_context_ids(true);
|
|
|
3407 |
list($insql, $inparams) = $DB->get_in_or_equal($contexts, SQL_PARAMS_NAMED);
|
|
|
3408 |
|
|
|
3409 |
$extrajoins = "JOIN {role_allow_view} ras ON ras.allowview = r.id
|
|
|
3410 |
JOIN {role_assignments} ra ON ra.roleid = ras.roleid";
|
|
|
3411 |
$extrawhere = "WHERE ra.userid = :userid AND ra.contextid $insql";
|
|
|
3412 |
|
|
|
3413 |
$params += $inparams;
|
|
|
3414 |
$params['userid'] = $userid;
|
|
|
3415 |
}
|
|
|
3416 |
|
|
|
3417 |
if ($coursecontext = $context->get_course_context(false)) {
|
|
|
3418 |
$params['coursecontext'] = $coursecontext->id;
|
|
|
3419 |
} else {
|
|
|
3420 |
$params['coursecontext'] = 0; // No course aliases.
|
|
|
3421 |
$coursecontext = null;
|
|
|
3422 |
}
|
|
|
3423 |
|
|
|
3424 |
$query = "
|
|
|
3425 |
SELECT r.id, r.name, r.shortname, rn.name AS coursealias, r.sortorder
|
|
|
3426 |
FROM {role} r
|
|
|
3427 |
$extrajoins
|
|
|
3428 |
LEFT JOIN {role_names} rn ON (rn.contextid = :coursecontext AND rn.roleid = r.id)
|
|
|
3429 |
$extrawhere
|
|
|
3430 |
GROUP BY r.id, r.name, r.shortname, rn.name, r.sortorder
|
|
|
3431 |
ORDER BY r.sortorder";
|
|
|
3432 |
$roles = $DB->get_records_sql($query, $params);
|
|
|
3433 |
|
|
|
3434 |
return role_fix_names($roles, $context, $rolenamedisplay, true);
|
|
|
3435 |
}
|
|
|
3436 |
|
|
|
3437 |
/**
|
|
|
3438 |
* Gets a list of roles that this user can override in this context.
|
|
|
3439 |
*
|
|
|
3440 |
* @param context $context the context.
|
|
|
3441 |
* @param int $rolenamedisplay the type of role name to display. One of the
|
|
|
3442 |
* ROLENAME_X constants. Default ROLENAME_ALIAS.
|
|
|
3443 |
* @param bool $withcounts if true, count the number of overrides that are set for each role.
|
|
|
3444 |
* @return array if $withcounts is false, then an array $roleid => $rolename.
|
|
|
3445 |
* if $withusercounts is true, returns a list of three arrays,
|
|
|
3446 |
* $rolenames, $rolecounts, and $nameswithcounts.
|
|
|
3447 |
*/
|
|
|
3448 |
function get_overridable_roles(context $context, $rolenamedisplay = ROLENAME_ALIAS, $withcounts = false) {
|
|
|
3449 |
global $USER, $DB;
|
|
|
3450 |
|
|
|
3451 |
if (!has_any_capability(array('moodle/role:safeoverride', 'moodle/role:override'), $context)) {
|
|
|
3452 |
if ($withcounts) {
|
|
|
3453 |
return array(array(), array(), array());
|
|
|
3454 |
} else {
|
|
|
3455 |
return array();
|
|
|
3456 |
}
|
|
|
3457 |
}
|
|
|
3458 |
|
|
|
3459 |
$parents = $context->get_parent_context_ids(true);
|
|
|
3460 |
$contexts = implode(',' , $parents);
|
|
|
3461 |
|
|
|
3462 |
$params = array();
|
|
|
3463 |
$extrafields = '';
|
|
|
3464 |
|
|
|
3465 |
$params['userid'] = $USER->id;
|
|
|
3466 |
if ($withcounts) {
|
|
|
3467 |
$extrafields = ', (SELECT COUNT(rc.id) FROM {role_capabilities} rc
|
|
|
3468 |
WHERE rc.roleid = ro.id AND rc.contextid = :conid) AS overridecount';
|
|
|
3469 |
$params['conid'] = $context->id;
|
|
|
3470 |
}
|
|
|
3471 |
|
|
|
3472 |
if ($coursecontext = $context->get_course_context(false)) {
|
|
|
3473 |
$params['coursecontext'] = $coursecontext->id;
|
|
|
3474 |
} else {
|
|
|
3475 |
$params['coursecontext'] = 0; // no course aliases
|
|
|
3476 |
$coursecontext = null;
|
|
|
3477 |
}
|
|
|
3478 |
|
|
|
3479 |
if (is_siteadmin()) {
|
|
|
3480 |
// show all roles to admins
|
|
|
3481 |
$roles = $DB->get_records_sql("
|
|
|
3482 |
SELECT ro.id, ro.name, ro.shortname, rn.name AS coursealias $extrafields
|
|
|
3483 |
FROM {role} ro
|
|
|
3484 |
LEFT JOIN {role_names} rn ON (rn.contextid = :coursecontext AND rn.roleid = ro.id)
|
|
|
3485 |
ORDER BY ro.sortorder ASC", $params);
|
|
|
3486 |
|
|
|
3487 |
} else {
|
|
|
3488 |
$roles = $DB->get_records_sql("
|
|
|
3489 |
SELECT ro.id, ro.name, ro.shortname, rn.name AS coursealias $extrafields
|
|
|
3490 |
FROM {role} ro
|
|
|
3491 |
JOIN (SELECT DISTINCT r.id
|
|
|
3492 |
FROM {role} r
|
|
|
3493 |
JOIN {role_allow_override} rao ON r.id = rao.allowoverride
|
|
|
3494 |
JOIN {role_assignments} ra ON rao.roleid = ra.roleid
|
|
|
3495 |
WHERE ra.userid = :userid AND ra.contextid IN ($contexts)
|
|
|
3496 |
) inline_view ON ro.id = inline_view.id
|
|
|
3497 |
LEFT JOIN {role_names} rn ON (rn.contextid = :coursecontext AND rn.roleid = ro.id)
|
|
|
3498 |
ORDER BY ro.sortorder ASC", $params);
|
|
|
3499 |
}
|
|
|
3500 |
|
|
|
3501 |
$rolenames = role_fix_names($roles, $context, $rolenamedisplay, true);
|
|
|
3502 |
|
|
|
3503 |
if (!$withcounts) {
|
|
|
3504 |
return $rolenames;
|
|
|
3505 |
}
|
|
|
3506 |
|
|
|
3507 |
$rolecounts = array();
|
|
|
3508 |
$nameswithcounts = array();
|
|
|
3509 |
foreach ($roles as $role) {
|
|
|
3510 |
$nameswithcounts[$role->id] = $rolenames[$role->id] . ' (' . $roles[$role->id]->overridecount . ')';
|
|
|
3511 |
$rolecounts[$role->id] = $roles[$role->id]->overridecount;
|
|
|
3512 |
}
|
|
|
3513 |
return array($rolenames, $rolecounts, $nameswithcounts);
|
|
|
3514 |
}
|
|
|
3515 |
|
|
|
3516 |
/**
|
|
|
3517 |
* Create a role menu suitable for default role selection in enrol plugins.
|
|
|
3518 |
*
|
|
|
3519 |
* @package core_enrol
|
|
|
3520 |
*
|
|
|
3521 |
* @param context $context
|
|
|
3522 |
* @param int $addroleid current or default role - always added to list
|
|
|
3523 |
* @return array roleid=>localised role name
|
|
|
3524 |
*/
|
|
|
3525 |
function get_default_enrol_roles(context $context, $addroleid = null) {
|
|
|
3526 |
global $DB;
|
|
|
3527 |
|
|
|
3528 |
$params = array('contextlevel'=>CONTEXT_COURSE);
|
|
|
3529 |
|
|
|
3530 |
if ($coursecontext = $context->get_course_context(false)) {
|
|
|
3531 |
$params['coursecontext'] = $coursecontext->id;
|
|
|
3532 |
} else {
|
|
|
3533 |
$params['coursecontext'] = 0; // no course names
|
|
|
3534 |
$coursecontext = null;
|
|
|
3535 |
}
|
|
|
3536 |
|
|
|
3537 |
if ($addroleid) {
|
|
|
3538 |
$addrole = "OR r.id = :addroleid";
|
|
|
3539 |
$params['addroleid'] = $addroleid;
|
|
|
3540 |
} else {
|
|
|
3541 |
$addrole = "";
|
|
|
3542 |
}
|
|
|
3543 |
|
|
|
3544 |
$sql = "SELECT r.id, r.name, r.shortname, rn.name AS coursealias
|
|
|
3545 |
FROM {role} r
|
|
|
3546 |
LEFT JOIN {role_context_levels} rcl ON (rcl.roleid = r.id AND rcl.contextlevel = :contextlevel)
|
|
|
3547 |
LEFT JOIN {role_names} rn ON (rn.contextid = :coursecontext AND rn.roleid = r.id)
|
|
|
3548 |
WHERE rcl.id IS NOT NULL $addrole
|
|
|
3549 |
ORDER BY sortorder DESC";
|
|
|
3550 |
|
|
|
3551 |
$roles = $DB->get_records_sql($sql, $params);
|
|
|
3552 |
|
|
|
3553 |
return role_fix_names($roles, $context, ROLENAME_BOTH, true);
|
|
|
3554 |
}
|
|
|
3555 |
|
|
|
3556 |
/**
|
|
|
3557 |
* Return context levels where this role is assignable.
|
|
|
3558 |
*
|
|
|
3559 |
* @param integer $roleid the id of a role.
|
|
|
3560 |
* @return array list of the context levels at which this role may be assigned.
|
|
|
3561 |
*/
|
|
|
3562 |
function get_role_contextlevels($roleid) {
|
|
|
3563 |
global $DB;
|
|
|
3564 |
return $DB->get_records_menu('role_context_levels', array('roleid' => $roleid),
|
|
|
3565 |
'contextlevel', 'id,contextlevel');
|
|
|
3566 |
}
|
|
|
3567 |
|
|
|
3568 |
/**
|
|
|
3569 |
* Return roles suitable for assignment at the specified context level.
|
|
|
3570 |
*
|
|
|
3571 |
* NOTE: this function name looks like a typo, should be probably get_roles_for_contextlevel()
|
|
|
3572 |
*
|
|
|
3573 |
* @param integer $contextlevel a contextlevel.
|
|
|
3574 |
* @return array list of role ids that are assignable at this context level.
|
|
|
3575 |
*/
|
|
|
3576 |
function get_roles_for_contextlevels($contextlevel) {
|
|
|
3577 |
global $DB;
|
|
|
3578 |
return $DB->get_records_menu('role_context_levels', array('contextlevel' => $contextlevel),
|
|
|
3579 |
'', 'id,roleid');
|
|
|
3580 |
}
|
|
|
3581 |
|
|
|
3582 |
/**
|
|
|
3583 |
* Returns default context levels where roles can be assigned.
|
|
|
3584 |
*
|
|
|
3585 |
* @param string $rolearchetype one of the role archetypes - that is, one of the keys
|
|
|
3586 |
* from the array returned by get_role_archetypes();
|
|
|
3587 |
* @return array list of the context levels at which this type of role may be assigned by default.
|
|
|
3588 |
*/
|
|
|
3589 |
function get_default_contextlevels($rolearchetype) {
|
|
|
3590 |
return \context_helper::get_compatible_levels($rolearchetype);
|
|
|
3591 |
}
|
|
|
3592 |
|
|
|
3593 |
/**
|
|
|
3594 |
* Set the context levels at which a particular role can be assigned.
|
|
|
3595 |
* Throws exceptions in case of error.
|
|
|
3596 |
*
|
|
|
3597 |
* @param integer $roleid the id of a role.
|
|
|
3598 |
* @param array $contextlevels the context levels at which this role should be assignable,
|
|
|
3599 |
* duplicate levels are removed.
|
|
|
3600 |
* @return void
|
|
|
3601 |
*/
|
|
|
3602 |
function set_role_contextlevels($roleid, array $contextlevels) {
|
|
|
3603 |
global $DB;
|
|
|
3604 |
$DB->delete_records('role_context_levels', array('roleid' => $roleid));
|
|
|
3605 |
$rcl = new stdClass();
|
|
|
3606 |
$rcl->roleid = $roleid;
|
|
|
3607 |
$contextlevels = array_unique($contextlevels);
|
|
|
3608 |
foreach ($contextlevels as $level) {
|
|
|
3609 |
$rcl->contextlevel = $level;
|
|
|
3610 |
$DB->insert_record('role_context_levels', $rcl, false, true);
|
|
|
3611 |
}
|
|
|
3612 |
}
|
|
|
3613 |
|
|
|
3614 |
/**
|
|
|
3615 |
* Gets sql joins for finding users with capability in the given context.
|
|
|
3616 |
*
|
|
|
3617 |
* @param context $context Context for the join.
|
|
|
3618 |
* @param string|array $capability Capability name or array of names.
|
|
|
3619 |
* If an array is provided then this is the equivalent of a logical 'OR',
|
|
|
3620 |
* i.e. the user needs to have one of these capabilities.
|
|
|
3621 |
* @param string $useridcolumn e.g. 'u.id'.
|
|
|
3622 |
* @return \core\dml\sql_join Contains joins, wheres, params.
|
|
|
3623 |
* This function will set ->cannotmatchanyrows if applicable.
|
|
|
3624 |
* This may let you skip doing a DB query.
|
|
|
3625 |
*/
|
|
|
3626 |
function get_with_capability_join(context $context, $capability, $useridcolumn) {
|
|
|
3627 |
global $CFG, $DB;
|
|
|
3628 |
|
|
|
3629 |
// Add a unique prefix to param names to ensure they are unique.
|
|
|
3630 |
static $i = 0;
|
|
|
3631 |
$i++;
|
|
|
3632 |
$paramprefix = 'eu' . $i . '_';
|
|
|
3633 |
|
|
|
3634 |
$defaultuserroleid = isset($CFG->defaultuserroleid) ? $CFG->defaultuserroleid : 0;
|
|
|
3635 |
$defaultfrontpageroleid = isset($CFG->defaultfrontpageroleid) ? $CFG->defaultfrontpageroleid : 0;
|
|
|
3636 |
|
|
|
3637 |
$ctxids = trim($context->path, '/');
|
|
|
3638 |
$ctxids = str_replace('/', ',', $ctxids);
|
|
|
3639 |
|
|
|
3640 |
// Context is the frontpage
|
|
|
3641 |
$isfrontpage = $context->contextlevel == CONTEXT_COURSE && $context->instanceid == SITEID;
|
|
|
3642 |
$isfrontpage = $isfrontpage || is_inside_frontpage($context);
|
|
|
3643 |
|
|
|
3644 |
$caps = (array) $capability;
|
|
|
3645 |
|
|
|
3646 |
// Construct list of context paths bottom --> top.
|
|
|
3647 |
list($contextids, $paths) = get_context_info_list($context);
|
|
|
3648 |
|
|
|
3649 |
// We need to find out all roles that have these capabilities either in definition or in overrides.
|
|
|
3650 |
$defs = [];
|
|
|
3651 |
list($incontexts, $params) = $DB->get_in_or_equal($contextids, SQL_PARAMS_NAMED, $paramprefix . 'con');
|
|
|
3652 |
list($incaps, $params2) = $DB->get_in_or_equal($caps, SQL_PARAMS_NAMED, $paramprefix . 'cap');
|
|
|
3653 |
|
|
|
3654 |
// Check whether context locking is enabled.
|
|
|
3655 |
// Filter out any write capability if this is the case.
|
|
|
3656 |
$excludelockedcaps = '';
|
|
|
3657 |
$excludelockedcapsparams = [];
|
|
|
3658 |
if (!empty($CFG->contextlocking) && $context->locked) {
|
|
|
3659 |
$excludelockedcaps = 'AND (cap.captype = :capread OR cap.name = :managelockscap)';
|
|
|
3660 |
$excludelockedcapsparams['capread'] = 'read';
|
|
|
3661 |
$excludelockedcapsparams['managelockscap'] = 'moodle/site:managecontextlocks';
|
|
|
3662 |
}
|
|
|
3663 |
|
|
|
3664 |
$params = array_merge($params, $params2, $excludelockedcapsparams);
|
|
|
3665 |
$sql = "SELECT rc.id, rc.roleid, rc.permission, rc.capability, ctx.path
|
|
|
3666 |
FROM {role_capabilities} rc
|
|
|
3667 |
JOIN {capabilities} cap ON rc.capability = cap.name
|
|
|
3668 |
JOIN {context} ctx on rc.contextid = ctx.id
|
|
|
3669 |
WHERE rc.contextid $incontexts AND rc.capability $incaps $excludelockedcaps";
|
|
|
3670 |
|
|
|
3671 |
$rcs = $DB->get_records_sql($sql, $params);
|
|
|
3672 |
foreach ($rcs as $rc) {
|
|
|
3673 |
$defs[$rc->capability][$rc->path][$rc->roleid] = $rc->permission;
|
|
|
3674 |
}
|
|
|
3675 |
|
|
|
3676 |
// Go through the permissions bottom-->top direction to evaluate the current permission,
|
|
|
3677 |
// first one wins (prohibit is an exception that always wins).
|
|
|
3678 |
$access = [];
|
|
|
3679 |
foreach ($caps as $cap) {
|
|
|
3680 |
foreach ($paths as $path) {
|
|
|
3681 |
if (empty($defs[$cap][$path])) {
|
|
|
3682 |
continue;
|
|
|
3683 |
}
|
|
|
3684 |
foreach ($defs[$cap][$path] as $roleid => $perm) {
|
|
|
3685 |
if ($perm == CAP_PROHIBIT) {
|
|
|
3686 |
$access[$cap][$roleid] = CAP_PROHIBIT;
|
|
|
3687 |
continue;
|
|
|
3688 |
}
|
|
|
3689 |
if (!isset($access[$cap][$roleid])) {
|
|
|
3690 |
$access[$cap][$roleid] = (int)$perm;
|
|
|
3691 |
}
|
|
|
3692 |
}
|
|
|
3693 |
}
|
|
|
3694 |
}
|
|
|
3695 |
|
|
|
3696 |
// Make lists of roles that are needed and prohibited in this context.
|
|
|
3697 |
$needed = []; // One of these is enough.
|
|
|
3698 |
$prohibited = []; // Must not have any of these.
|
|
|
3699 |
foreach ($caps as $cap) {
|
|
|
3700 |
if (empty($access[$cap])) {
|
|
|
3701 |
continue;
|
|
|
3702 |
}
|
|
|
3703 |
foreach ($access[$cap] as $roleid => $perm) {
|
|
|
3704 |
if ($perm == CAP_PROHIBIT) {
|
|
|
3705 |
unset($needed[$cap][$roleid]);
|
|
|
3706 |
$prohibited[$cap][$roleid] = true;
|
|
|
3707 |
} else if ($perm == CAP_ALLOW and empty($prohibited[$cap][$roleid])) {
|
|
|
3708 |
$needed[$cap][$roleid] = true;
|
|
|
3709 |
}
|
|
|
3710 |
}
|
|
|
3711 |
if (empty($needed[$cap]) or !empty($prohibited[$cap][$defaultuserroleid])) {
|
|
|
3712 |
// Easy, nobody has the permission.
|
|
|
3713 |
unset($needed[$cap]);
|
|
|
3714 |
unset($prohibited[$cap]);
|
|
|
3715 |
} else if ($isfrontpage and !empty($prohibited[$cap][$defaultfrontpageroleid])) {
|
|
|
3716 |
// Everybody is disqualified on the frontpage.
|
|
|
3717 |
unset($needed[$cap]);
|
|
|
3718 |
unset($prohibited[$cap]);
|
|
|
3719 |
}
|
|
|
3720 |
if (empty($prohibited[$cap])) {
|
|
|
3721 |
unset($prohibited[$cap]);
|
|
|
3722 |
}
|
|
|
3723 |
}
|
|
|
3724 |
|
|
|
3725 |
if (empty($needed)) {
|
|
|
3726 |
// There can not be anybody if no roles match this request.
|
|
|
3727 |
return new \core\dml\sql_join('', '1 = 2', [], true);
|
|
|
3728 |
}
|
|
|
3729 |
|
|
|
3730 |
if (empty($prohibited)) {
|
|
|
3731 |
// We can compact the needed roles.
|
|
|
3732 |
$n = [];
|
|
|
3733 |
foreach ($needed as $cap) {
|
|
|
3734 |
foreach ($cap as $roleid => $unused) {
|
|
|
3735 |
$n[$roleid] = true;
|
|
|
3736 |
}
|
|
|
3737 |
}
|
|
|
3738 |
$needed = ['any' => $n];
|
|
|
3739 |
unset($n);
|
|
|
3740 |
}
|
|
|
3741 |
|
|
|
3742 |
// Prepare query clauses.
|
|
|
3743 |
$wherecond = [];
|
|
|
3744 |
$params = [];
|
|
|
3745 |
$joins = [];
|
|
|
3746 |
$cannotmatchanyrows = false;
|
|
|
3747 |
|
|
|
3748 |
// We never return deleted users or guest account.
|
|
|
3749 |
// Use a hack to get the deleted user column without an API change.
|
|
|
3750 |
$deletedusercolumn = substr($useridcolumn, 0, -2) . 'deleted';
|
|
|
3751 |
$wherecond[] = "$deletedusercolumn = 0 AND $useridcolumn <> :{$paramprefix}guestid";
|
|
|
3752 |
$params[$paramprefix . 'guestid'] = $CFG->siteguest;
|
|
|
3753 |
|
|
|
3754 |
// Now add the needed and prohibited roles conditions as joins.
|
|
|
3755 |
if (!empty($needed['any'])) {
|
|
|
3756 |
// Simple case - there are no prohibits involved.
|
|
|
3757 |
if (!empty($needed['any'][$defaultuserroleid]) ||
|
|
|
3758 |
($isfrontpage && !empty($needed['any'][$defaultfrontpageroleid]))) {
|
|
|
3759 |
// Everybody.
|
|
|
3760 |
} else {
|
|
|
3761 |
$joins[] = "JOIN (SELECT DISTINCT userid
|
|
|
3762 |
FROM {role_assignments}
|
|
|
3763 |
WHERE contextid IN ($ctxids)
|
|
|
3764 |
AND roleid IN (" . implode(',', array_keys($needed['any'])) . ")
|
|
|
3765 |
) ra ON ra.userid = $useridcolumn";
|
|
|
3766 |
}
|
|
|
3767 |
} else {
|
|
|
3768 |
$unions = [];
|
|
|
3769 |
$everybody = false;
|
|
|
3770 |
foreach ($needed as $cap => $unused) {
|
|
|
3771 |
if (empty($prohibited[$cap])) {
|
|
|
3772 |
if (!empty($needed[$cap][$defaultuserroleid]) ||
|
|
|
3773 |
($isfrontpage && !empty($needed[$cap][$defaultfrontpageroleid]))) {
|
|
|
3774 |
$everybody = true;
|
|
|
3775 |
break;
|
|
|
3776 |
} else {
|
|
|
3777 |
$unions[] = "SELECT userid
|
|
|
3778 |
FROM {role_assignments}
|
|
|
3779 |
WHERE contextid IN ($ctxids)
|
|
|
3780 |
AND roleid IN (".implode(',', array_keys($needed[$cap])) .")";
|
|
|
3781 |
}
|
|
|
3782 |
} else {
|
|
|
3783 |
if (!empty($prohibited[$cap][$defaultuserroleid]) ||
|
|
|
3784 |
($isfrontpage && !empty($prohibited[$cap][$defaultfrontpageroleid]))) {
|
|
|
3785 |
// Nobody can have this cap because it is prohibited in default roles.
|
|
|
3786 |
continue;
|
|
|
3787 |
|
|
|
3788 |
} else if (!empty($needed[$cap][$defaultuserroleid]) ||
|
|
|
3789 |
($isfrontpage && !empty($needed[$cap][$defaultfrontpageroleid]))) {
|
|
|
3790 |
// Everybody except the prohibited - hiding does not matter.
|
|
|
3791 |
$unions[] = "SELECT id AS userid
|
|
|
3792 |
FROM {user}
|
|
|
3793 |
WHERE id NOT IN (SELECT userid
|
|
|
3794 |
FROM {role_assignments}
|
|
|
3795 |
WHERE contextid IN ($ctxids)
|
|
|
3796 |
AND roleid IN (" . implode(',', array_keys($prohibited[$cap])) . "))";
|
|
|
3797 |
|
|
|
3798 |
} else {
|
|
|
3799 |
$unions[] = "SELECT userid
|
|
|
3800 |
FROM {role_assignments}
|
|
|
3801 |
WHERE contextid IN ($ctxids) AND roleid IN (" . implode(',', array_keys($needed[$cap])) . ")
|
|
|
3802 |
AND userid NOT IN (
|
|
|
3803 |
SELECT userid
|
|
|
3804 |
FROM {role_assignments}
|
|
|
3805 |
WHERE contextid IN ($ctxids)
|
|
|
3806 |
AND roleid IN (" . implode(',', array_keys($prohibited[$cap])) . "))";
|
|
|
3807 |
}
|
|
|
3808 |
}
|
|
|
3809 |
}
|
|
|
3810 |
|
|
|
3811 |
if (!$everybody) {
|
|
|
3812 |
if ($unions) {
|
|
|
3813 |
$joins[] = "JOIN (
|
|
|
3814 |
SELECT DISTINCT userid
|
|
|
3815 |
FROM (
|
|
|
3816 |
" . implode("\n UNION \n", $unions) . "
|
|
|
3817 |
) us
|
|
|
3818 |
) ra ON ra.userid = $useridcolumn";
|
|
|
3819 |
} else {
|
|
|
3820 |
// Only prohibits found - nobody can be matched.
|
|
|
3821 |
$wherecond[] = "1 = 2";
|
|
|
3822 |
$cannotmatchanyrows = true;
|
|
|
3823 |
}
|
|
|
3824 |
}
|
|
|
3825 |
}
|
|
|
3826 |
|
|
|
3827 |
return new \core\dml\sql_join(implode("\n", $joins), implode(" AND ", $wherecond), $params, $cannotmatchanyrows);
|
|
|
3828 |
}
|
|
|
3829 |
|
|
|
3830 |
/**
|
|
|
3831 |
* Who has this capability in this context?
|
|
|
3832 |
*
|
|
|
3833 |
* This can be a very expensive call - use sparingly and keep
|
|
|
3834 |
* the results if you are going to need them again soon.
|
|
|
3835 |
*
|
|
|
3836 |
* Note if $fields is empty this function attempts to get u.*
|
|
|
3837 |
* which can get rather large - and has a serious perf impact
|
|
|
3838 |
* on some DBs.
|
|
|
3839 |
*
|
|
|
3840 |
* @param context $context
|
|
|
3841 |
* @param string|array $capability - capability name(s)
|
|
|
3842 |
* @param string $fields - fields to be pulled. The user table is aliased to 'u'. u.id MUST be included.
|
|
|
3843 |
* @param string $sort - the sort order. Default is lastaccess time.
|
|
|
3844 |
* @param mixed $limitfrom - number of records to skip (offset)
|
|
|
3845 |
* @param mixed $limitnum - number of records to fetch
|
|
|
3846 |
* @param string|array $groups - single group or array of groups - only return
|
|
|
3847 |
* users who are in one of these group(s).
|
|
|
3848 |
* @param string|array $exceptions - list of users to exclude, comma separated or array
|
|
|
3849 |
* @param bool $notuseddoanything not used any more, admin accounts are never returned
|
|
|
3850 |
* @param bool $notusedview - use get_enrolled_sql() instead
|
|
|
3851 |
* @param bool $useviewallgroups if $groups is set the return users who
|
|
|
3852 |
* have capability both $capability and moodle/site:accessallgroups
|
|
|
3853 |
* in this context, as well as users who have $capability and who are
|
|
|
3854 |
* in $groups.
|
|
|
3855 |
* @return array of user records
|
|
|
3856 |
*/
|
|
|
3857 |
function get_users_by_capability(context $context, $capability, $fields = '', $sort = '', $limitfrom = '', $limitnum = '',
|
|
|
3858 |
$groups = '', $exceptions = '', $notuseddoanything = null, $notusedview = null, $useviewallgroups = false) {
|
|
|
3859 |
global $CFG, $DB;
|
|
|
3860 |
|
|
|
3861 |
// Context is a course page other than the frontpage.
|
|
|
3862 |
$iscoursepage = $context->contextlevel == CONTEXT_COURSE && $context->instanceid != SITEID;
|
|
|
3863 |
|
|
|
3864 |
// Set up default fields list if necessary.
|
|
|
3865 |
if (empty($fields)) {
|
|
|
3866 |
if ($iscoursepage) {
|
|
|
3867 |
$fields = 'u.*, ul.timeaccess AS lastaccess';
|
|
|
3868 |
} else {
|
|
|
3869 |
$fields = 'u.*';
|
|
|
3870 |
}
|
|
|
3871 |
} else {
|
|
|
3872 |
if ($CFG->debugdeveloper && strpos($fields, 'u.*') === false && strpos($fields, 'u.id') === false) {
|
|
|
3873 |
debugging('u.id must be included in the list of fields passed to get_users_by_capability().', DEBUG_DEVELOPER);
|
|
|
3874 |
}
|
|
|
3875 |
}
|
|
|
3876 |
|
|
|
3877 |
// Set up default sort if necessary.
|
|
|
3878 |
if (empty($sort)) { // default to course lastaccess or just lastaccess
|
|
|
3879 |
if ($iscoursepage) {
|
|
|
3880 |
$sort = 'ul.timeaccess';
|
|
|
3881 |
} else {
|
|
|
3882 |
$sort = 'u.lastaccess';
|
|
|
3883 |
}
|
|
|
3884 |
}
|
|
|
3885 |
|
|
|
3886 |
// Get the bits of SQL relating to capabilities.
|
|
|
3887 |
$sqljoin = get_with_capability_join($context, $capability, 'u.id');
|
|
|
3888 |
if ($sqljoin->cannotmatchanyrows) {
|
|
|
3889 |
return [];
|
|
|
3890 |
}
|
|
|
3891 |
|
|
|
3892 |
// Prepare query clauses.
|
|
|
3893 |
$wherecond = [$sqljoin->wheres];
|
|
|
3894 |
$params = $sqljoin->params;
|
|
|
3895 |
$joins = [$sqljoin->joins];
|
|
|
3896 |
|
|
|
3897 |
// Add user lastaccess JOIN, if required.
|
|
|
3898 |
if ((strpos($sort, 'ul.timeaccess') === false) and (strpos($fields, 'ul.timeaccess') === false)) {
|
|
|
3899 |
// Here user_lastaccess is not required MDL-13810.
|
|
|
3900 |
} else {
|
|
|
3901 |
if ($iscoursepage) {
|
|
|
3902 |
$joins[] = "LEFT OUTER JOIN {user_lastaccess} ul ON (ul.userid = u.id AND ul.courseid = {$context->instanceid})";
|
|
|
3903 |
} else {
|
|
|
3904 |
throw new coding_exception('Invalid sort in get_users_by_capability(), ul.timeaccess allowed only for course contexts.');
|
|
|
3905 |
}
|
|
|
3906 |
}
|
|
|
3907 |
|
|
|
3908 |
// Groups.
|
|
|
3909 |
if ($groups) {
|
|
|
3910 |
$groups = (array)$groups;
|
|
|
3911 |
list($grouptest, $grpparams) = $DB->get_in_or_equal($groups, SQL_PARAMS_NAMED, 'grp');
|
|
|
3912 |
$joins[] = "LEFT OUTER JOIN (SELECT DISTINCT userid
|
|
|
3913 |
FROM {groups_members}
|
|
|
3914 |
WHERE groupid $grouptest
|
|
|
3915 |
) gm ON gm.userid = u.id";
|
|
|
3916 |
|
|
|
3917 |
$params = array_merge($params, $grpparams);
|
|
|
3918 |
|
|
|
3919 |
$grouptest = 'gm.userid IS NOT NULL';
|
|
|
3920 |
if ($useviewallgroups) {
|
|
|
3921 |
$viewallgroupsusers = get_users_by_capability($context, 'moodle/site:accessallgroups', 'u.id, u.id', '', '', '', '', $exceptions);
|
|
|
3922 |
if (!empty($viewallgroupsusers)) {
|
|
|
3923 |
$grouptest .= ' OR u.id IN (' . implode(',', array_keys($viewallgroupsusers)) . ')';
|
|
|
3924 |
}
|
|
|
3925 |
}
|
|
|
3926 |
$wherecond[] = "($grouptest)";
|
|
|
3927 |
}
|
|
|
3928 |
|
|
|
3929 |
// User exceptions.
|
|
|
3930 |
if (!empty($exceptions)) {
|
|
|
3931 |
$exceptions = (array)$exceptions;
|
|
|
3932 |
list($exsql, $exparams) = $DB->get_in_or_equal($exceptions, SQL_PARAMS_NAMED, 'exc', false);
|
|
|
3933 |
$params = array_merge($params, $exparams);
|
|
|
3934 |
$wherecond[] = "u.id $exsql";
|
|
|
3935 |
}
|
|
|
3936 |
|
|
|
3937 |
// Collect WHERE conditions and needed joins.
|
|
|
3938 |
$where = implode(' AND ', $wherecond);
|
|
|
3939 |
if ($where !== '') {
|
|
|
3940 |
$where = 'WHERE ' . $where;
|
|
|
3941 |
}
|
|
|
3942 |
$joins = implode("\n", $joins);
|
|
|
3943 |
|
|
|
3944 |
// Finally! we have all the bits, run the query.
|
|
|
3945 |
$sql = "SELECT $fields
|
|
|
3946 |
FROM {user} u
|
|
|
3947 |
$joins
|
|
|
3948 |
$where
|
|
|
3949 |
ORDER BY $sort";
|
|
|
3950 |
|
|
|
3951 |
return $DB->get_records_sql($sql, $params, $limitfrom, $limitnum);
|
|
|
3952 |
}
|
|
|
3953 |
|
|
|
3954 |
/**
|
|
|
3955 |
* Re-sort a users array based on a sorting policy
|
|
|
3956 |
*
|
|
|
3957 |
* Will re-sort a $users results array (from get_users_by_capability(), usually)
|
|
|
3958 |
* based on a sorting policy. This is to support the odd practice of
|
|
|
3959 |
* sorting teachers by 'authority', where authority was "lowest id of the role
|
|
|
3960 |
* assignment".
|
|
|
3961 |
*
|
|
|
3962 |
* Will execute 1 database query. Only suitable for small numbers of users, as it
|
|
|
3963 |
* uses an u.id IN() clause.
|
|
|
3964 |
*
|
|
|
3965 |
* Notes about the sorting criteria.
|
|
|
3966 |
*
|
|
|
3967 |
* As a default, we cannot rely on role.sortorder because then
|
|
|
3968 |
* admins/coursecreators will always win. That is why the sane
|
|
|
3969 |
* rule "is locality matters most", with sortorder as 2nd
|
|
|
3970 |
* consideration.
|
|
|
3971 |
*
|
|
|
3972 |
* If you want role.sortorder, use the 'sortorder' policy, and
|
|
|
3973 |
* name explicitly what roles you want to cover. It's probably
|
|
|
3974 |
* a good idea to see what roles have the capabilities you want
|
|
|
3975 |
* (array_diff() them against roiles that have 'can-do-anything'
|
|
|
3976 |
* to weed out admin-ish roles. Or fetch a list of roles from
|
|
|
3977 |
* variables like $CFG->coursecontact .
|
|
|
3978 |
*
|
|
|
3979 |
* @param array $users Users array, keyed on userid
|
|
|
3980 |
* @param context $context
|
|
|
3981 |
* @param array $roles ids of the roles to include, optional
|
|
|
3982 |
* @param string $sortpolicy defaults to locality, more about
|
|
|
3983 |
* @return array sorted copy of the array
|
|
|
3984 |
*/
|
|
|
3985 |
function sort_by_roleassignment_authority($users, context $context, $roles = array(), $sortpolicy = 'locality') {
|
|
|
3986 |
global $DB;
|
|
|
3987 |
|
|
|
3988 |
$userswhere = ' ra.userid IN (' . implode(',',array_keys($users)) . ')';
|
|
|
3989 |
$contextwhere = 'AND ra.contextid IN ('.str_replace('/', ',',substr($context->path, 1)).')';
|
|
|
3990 |
if (empty($roles)) {
|
|
|
3991 |
$roleswhere = '';
|
|
|
3992 |
} else {
|
|
|
3993 |
$roleswhere = ' AND ra.roleid IN ('.implode(',',$roles).')';
|
|
|
3994 |
}
|
|
|
3995 |
|
|
|
3996 |
$sql = "SELECT ra.userid
|
|
|
3997 |
FROM {role_assignments} ra
|
|
|
3998 |
JOIN {role} r
|
|
|
3999 |
ON ra.roleid=r.id
|
|
|
4000 |
JOIN {context} ctx
|
|
|
4001 |
ON ra.contextid=ctx.id
|
|
|
4002 |
WHERE $userswhere
|
|
|
4003 |
$contextwhere
|
|
|
4004 |
$roleswhere";
|
|
|
4005 |
|
|
|
4006 |
// Default 'locality' policy -- read PHPDoc notes
|
|
|
4007 |
// about sort policies...
|
|
|
4008 |
$orderby = 'ORDER BY '
|
|
|
4009 |
.'ctx.depth DESC, ' /* locality wins */
|
|
|
4010 |
.'r.sortorder ASC, ' /* rolesorting 2nd criteria */
|
|
|
4011 |
.'ra.id'; /* role assignment order tie-breaker */
|
|
|
4012 |
if ($sortpolicy === 'sortorder') {
|
|
|
4013 |
$orderby = 'ORDER BY '
|
|
|
4014 |
.'r.sortorder ASC, ' /* rolesorting 2nd criteria */
|
|
|
4015 |
.'ra.id'; /* role assignment order tie-breaker */
|
|
|
4016 |
}
|
|
|
4017 |
|
|
|
4018 |
$sortedids = $DB->get_fieldset_sql($sql . $orderby);
|
|
|
4019 |
$sortedusers = array();
|
|
|
4020 |
$seen = array();
|
|
|
4021 |
|
|
|
4022 |
foreach ($sortedids as $id) {
|
|
|
4023 |
// Avoid duplicates
|
|
|
4024 |
if (isset($seen[$id])) {
|
|
|
4025 |
continue;
|
|
|
4026 |
}
|
|
|
4027 |
$seen[$id] = true;
|
|
|
4028 |
|
|
|
4029 |
// assign
|
|
|
4030 |
$sortedusers[$id] = $users[$id];
|
|
|
4031 |
}
|
|
|
4032 |
return $sortedusers;
|
|
|
4033 |
}
|
|
|
4034 |
|
|
|
4035 |
/**
|
|
|
4036 |
* Gets all the users assigned this role in this context or higher
|
|
|
4037 |
*
|
|
|
4038 |
* Note that moodle is based on capabilities and it is usually better
|
|
|
4039 |
* to check permissions than to check role ids as the capabilities
|
|
|
4040 |
* system is more flexible. If you really need, you can to use this
|
|
|
4041 |
* function but consider has_capability() as a possible substitute.
|
|
|
4042 |
*
|
|
|
4043 |
* All $sort fields are added into $fields if not present there yet.
|
|
|
4044 |
*
|
|
|
4045 |
* If $roleid is an array or is empty (all roles) you need to set $fields
|
|
|
4046 |
* (and $sort by extension) params according to it, as the first field
|
|
|
4047 |
* returned by the database should be unique (ra.id is the best candidate).
|
|
|
4048 |
*
|
|
|
4049 |
* @param int|array $roleid (can also be an array of ints!)
|
|
|
4050 |
* @param context $context
|
|
|
4051 |
* @param bool $parent if true, get list of users assigned in higher context too
|
|
|
4052 |
* @param string $fields fields from user (u.) , role assignment (ra) or role (r.)
|
|
|
4053 |
* @param string $sort sort from user (u.) , role assignment (ra.) or role (r.).
|
|
|
4054 |
* null => use default sort from users_order_by_sql.
|
|
|
4055 |
* @param bool $all true means all, false means limit to enrolled users
|
|
|
4056 |
* @param string $group defaults to ''
|
|
|
4057 |
* @param mixed $limitfrom defaults to ''
|
|
|
4058 |
* @param mixed $limitnum defaults to ''
|
|
|
4059 |
* @param string $extrawheretest defaults to ''
|
|
|
4060 |
* @param array $whereorsortparams any paramter values used by $sort or $extrawheretest.
|
|
|
4061 |
* @return array
|
|
|
4062 |
*/
|
|
|
4063 |
function get_role_users($roleid, context $context, $parent = false, $fields = '',
|
|
|
4064 |
$sort = null, $all = true, $group = '',
|
|
|
4065 |
$limitfrom = '', $limitnum = '', $extrawheretest = '', $whereorsortparams = array()) {
|
|
|
4066 |
global $DB;
|
|
|
4067 |
|
|
|
4068 |
if (empty($fields)) {
|
|
|
4069 |
$userfieldsapi = \core_user\fields::for_name();
|
|
|
4070 |
$allnames = $userfieldsapi->get_sql('u', false, '', '', false)->selects;
|
|
|
4071 |
$fields = 'u.id, u.confirmed, u.username, '. $allnames . ', ' .
|
|
|
4072 |
'u.maildisplay, u.mailformat, u.maildigest, u.email, u.emailstop, u.city, '.
|
|
|
4073 |
'u.country, u.picture, u.idnumber, u.department, u.institution, '.
|
|
|
4074 |
'u.lang, u.timezone, u.lastaccess, u.mnethostid, r.name AS rolename, r.sortorder, '.
|
|
|
4075 |
'r.shortname AS roleshortname, rn.name AS rolecoursealias';
|
|
|
4076 |
}
|
|
|
4077 |
|
|
|
4078 |
// Prevent wrong function uses.
|
|
|
4079 |
if ((empty($roleid) || is_array($roleid)) && strpos($fields, 'ra.id') !== 0) {
|
|
|
4080 |
debugging('get_role_users() without specifying one single roleid needs to be called prefixing ' .
|
|
|
4081 |
'role assignments id (ra.id) as unique field, you can use $fields param for it.');
|
|
|
4082 |
|
|
|
4083 |
if (!empty($roleid)) {
|
|
|
4084 |
// Solving partially the issue when specifying multiple roles.
|
|
|
4085 |
$users = array();
|
|
|
4086 |
foreach ($roleid as $id) {
|
|
|
4087 |
// Ignoring duplicated keys keeping the first user appearance.
|
|
|
4088 |
$users = $users + get_role_users($id, $context, $parent, $fields, $sort, $all, $group,
|
|
|
4089 |
$limitfrom, $limitnum, $extrawheretest, $whereorsortparams);
|
|
|
4090 |
}
|
|
|
4091 |
return $users;
|
|
|
4092 |
}
|
|
|
4093 |
}
|
|
|
4094 |
|
|
|
4095 |
$parentcontexts = '';
|
|
|
4096 |
if ($parent) {
|
|
|
4097 |
$parentcontexts = substr($context->path, 1); // kill leading slash
|
|
|
4098 |
$parentcontexts = str_replace('/', ',', $parentcontexts);
|
|
|
4099 |
if ($parentcontexts !== '') {
|
|
|
4100 |
$parentcontexts = ' OR ra.contextid IN ('.$parentcontexts.' )';
|
|
|
4101 |
}
|
|
|
4102 |
}
|
|
|
4103 |
|
|
|
4104 |
if ($roleid) {
|
|
|
4105 |
list($rids, $params) = $DB->get_in_or_equal($roleid, SQL_PARAMS_NAMED, 'r');
|
|
|
4106 |
$roleselect = "AND ra.roleid $rids";
|
|
|
4107 |
} else {
|
|
|
4108 |
$params = array();
|
|
|
4109 |
$roleselect = '';
|
|
|
4110 |
}
|
|
|
4111 |
|
|
|
4112 |
if ($coursecontext = $context->get_course_context(false)) {
|
|
|
4113 |
$params['coursecontext'] = $coursecontext->id;
|
|
|
4114 |
} else {
|
|
|
4115 |
$params['coursecontext'] = 0;
|
|
|
4116 |
}
|
|
|
4117 |
|
|
|
4118 |
if ($group) {
|
|
|
4119 |
$groupjoin = "JOIN {groups_members} gm ON gm.userid = u.id";
|
|
|
4120 |
$groupselect = " AND gm.groupid = :groupid ";
|
|
|
4121 |
$params['groupid'] = $group;
|
|
|
4122 |
} else {
|
|
|
4123 |
$groupjoin = '';
|
|
|
4124 |
$groupselect = '';
|
|
|
4125 |
}
|
|
|
4126 |
|
|
|
4127 |
$params['contextid'] = $context->id;
|
|
|
4128 |
|
|
|
4129 |
if ($extrawheretest) {
|
|
|
4130 |
$extrawheretest = ' AND ' . $extrawheretest;
|
|
|
4131 |
}
|
|
|
4132 |
|
|
|
4133 |
if ($whereorsortparams) {
|
|
|
4134 |
$params = array_merge($params, $whereorsortparams);
|
|
|
4135 |
}
|
|
|
4136 |
|
|
|
4137 |
if (!$sort) {
|
|
|
4138 |
list($sort, $sortparams) = users_order_by_sql('u');
|
|
|
4139 |
$params = array_merge($params, $sortparams);
|
|
|
4140 |
}
|
|
|
4141 |
|
|
|
4142 |
// Adding the fields from $sort that are not present in $fields.
|
|
|
4143 |
$sortarray = preg_split('/,\s*/', $sort);
|
|
|
4144 |
$fieldsarray = preg_split('/,\s*/', $fields);
|
|
|
4145 |
|
|
|
4146 |
// Discarding aliases from the fields.
|
|
|
4147 |
$fieldnames = array();
|
|
|
4148 |
foreach ($fieldsarray as $key => $field) {
|
|
|
4149 |
list($fieldnames[$key]) = explode(' ', $field);
|
|
|
4150 |
}
|
|
|
4151 |
|
|
|
4152 |
$addedfields = array();
|
|
|
4153 |
foreach ($sortarray as $sortfield) {
|
|
|
4154 |
// Throw away any additional arguments to the sort (e.g. ASC/DESC).
|
|
|
4155 |
list($sortfield) = explode(' ', $sortfield);
|
|
|
4156 |
list($tableprefix) = explode('.', $sortfield);
|
|
|
4157 |
$fieldpresent = false;
|
|
|
4158 |
foreach ($fieldnames as $fieldname) {
|
|
|
4159 |
if ($fieldname === $sortfield || $fieldname === $tableprefix.'.*') {
|
|
|
4160 |
$fieldpresent = true;
|
|
|
4161 |
break;
|
|
|
4162 |
}
|
|
|
4163 |
}
|
|
|
4164 |
|
|
|
4165 |
if (!$fieldpresent) {
|
|
|
4166 |
$fieldsarray[] = $sortfield;
|
|
|
4167 |
$addedfields[] = $sortfield;
|
|
|
4168 |
}
|
|
|
4169 |
}
|
|
|
4170 |
|
|
|
4171 |
$fields = implode(', ', $fieldsarray);
|
|
|
4172 |
if (!empty($addedfields)) {
|
|
|
4173 |
$addedfields = implode(', ', $addedfields);
|
|
|
4174 |
debugging('get_role_users() adding '.$addedfields.' to the query result because they were required by $sort but missing in $fields');
|
|
|
4175 |
}
|
|
|
4176 |
|
|
|
4177 |
if ($all === null) {
|
|
|
4178 |
// Previously null was used to indicate that parameter was not used.
|
|
|
4179 |
$all = true;
|
|
|
4180 |
}
|
|
|
4181 |
if (!$all and $coursecontext) {
|
|
|
4182 |
// Do not use get_enrolled_sql() here for performance reasons.
|
|
|
4183 |
$ejoin = "JOIN {user_enrolments} ue ON ue.userid = u.id
|
|
|
4184 |
JOIN {enrol} e ON (e.id = ue.enrolid AND e.courseid = :ecourseid)";
|
|
|
4185 |
$params['ecourseid'] = $coursecontext->instanceid;
|
|
|
4186 |
} else {
|
|
|
4187 |
$ejoin = "";
|
|
|
4188 |
}
|
|
|
4189 |
|
|
|
4190 |
$sql = "SELECT DISTINCT $fields, ra.roleid
|
|
|
4191 |
FROM {role_assignments} ra
|
|
|
4192 |
JOIN {user} u ON u.id = ra.userid
|
|
|
4193 |
JOIN {role} r ON ra.roleid = r.id
|
|
|
4194 |
$ejoin
|
|
|
4195 |
LEFT JOIN {role_names} rn ON (rn.contextid = :coursecontext AND rn.roleid = r.id)
|
|
|
4196 |
$groupjoin
|
|
|
4197 |
WHERE (ra.contextid = :contextid $parentcontexts)
|
|
|
4198 |
$roleselect
|
|
|
4199 |
$groupselect
|
|
|
4200 |
$extrawheretest
|
|
|
4201 |
ORDER BY $sort"; // join now so that we can just use fullname() later
|
|
|
4202 |
|
|
|
4203 |
return $DB->get_records_sql($sql, $params, $limitfrom, $limitnum);
|
|
|
4204 |
}
|
|
|
4205 |
|
|
|
4206 |
/**
|
|
|
4207 |
* Counts all the users assigned this role in this context or higher
|
|
|
4208 |
*
|
|
|
4209 |
* @param int|array $roleid either int or an array of ints
|
|
|
4210 |
* @param context $context
|
|
|
4211 |
* @param bool $parent if true, get list of users assigned in higher context too
|
|
|
4212 |
* @return int Returns the result count
|
|
|
4213 |
*/
|
|
|
4214 |
function count_role_users($roleid, context $context, $parent = false) {
|
|
|
4215 |
global $DB;
|
|
|
4216 |
|
|
|
4217 |
if ($parent) {
|
|
|
4218 |
if ($contexts = $context->get_parent_context_ids()) {
|
|
|
4219 |
$parentcontexts = ' OR r.contextid IN ('.implode(',', $contexts).')';
|
|
|
4220 |
} else {
|
|
|
4221 |
$parentcontexts = '';
|
|
|
4222 |
}
|
|
|
4223 |
} else {
|
|
|
4224 |
$parentcontexts = '';
|
|
|
4225 |
}
|
|
|
4226 |
|
|
|
4227 |
if ($roleid) {
|
|
|
4228 |
list($rids, $params) = $DB->get_in_or_equal($roleid, SQL_PARAMS_QM);
|
|
|
4229 |
$roleselect = "AND r.roleid $rids";
|
|
|
4230 |
} else {
|
|
|
4231 |
$params = array();
|
|
|
4232 |
$roleselect = '';
|
|
|
4233 |
}
|
|
|
4234 |
|
|
|
4235 |
array_unshift($params, $context->id);
|
|
|
4236 |
|
|
|
4237 |
$sql = "SELECT COUNT(DISTINCT u.id)
|
|
|
4238 |
FROM {role_assignments} r
|
|
|
4239 |
JOIN {user} u ON u.id = r.userid
|
|
|
4240 |
WHERE (r.contextid = ? $parentcontexts)
|
|
|
4241 |
$roleselect
|
|
|
4242 |
AND u.deleted = 0";
|
|
|
4243 |
|
|
|
4244 |
return $DB->count_records_sql($sql, $params);
|
|
|
4245 |
}
|
|
|
4246 |
|
|
|
4247 |
/**
|
|
|
4248 |
* This function gets the list of course and course category contexts that this user has a particular capability in.
|
|
|
4249 |
*
|
|
|
4250 |
* It is now reasonably efficient, but bear in mind that if there are users who have the capability
|
|
|
4251 |
* everywhere, it may return an array of all contexts.
|
|
|
4252 |
*
|
|
|
4253 |
* @param string $capability Capability in question
|
|
|
4254 |
* @param int $userid User ID or null for current user
|
|
|
4255 |
* @param bool $getcategories Wether to return also course_categories
|
|
|
4256 |
* @param bool $doanything True if 'doanything' is permitted (default)
|
|
|
4257 |
* @param string $coursefieldsexceptid Leave blank if you only need 'id' in the course records;
|
|
|
4258 |
* otherwise use a comma-separated list of the fields you require, not including id.
|
|
|
4259 |
* Add ctxid, ctxpath, ctxdepth etc to return course context information for preloading.
|
|
|
4260 |
* @param string $categoryfieldsexceptid Leave blank if you only need 'id' in the course records;
|
|
|
4261 |
* otherwise use a comma-separated list of the fields you require, not including id.
|
|
|
4262 |
* Add ctxid, ctxpath, ctxdepth etc to return course context information for preloading.
|
|
|
4263 |
* @param string $courseorderby If set, use a comma-separated list of fields from course
|
|
|
4264 |
* table with sql modifiers (DESC) if needed
|
|
|
4265 |
* @param string $categoryorderby If set, use a comma-separated list of fields from course_category
|
|
|
4266 |
* table with sql modifiers (DESC) if needed
|
|
|
4267 |
* @param int $limit Limit the number of courses to return on success. Zero equals all entries.
|
|
|
4268 |
* @return array Array of categories and courses.
|
|
|
4269 |
*/
|
|
|
4270 |
function get_user_capability_contexts(string $capability, bool $getcategories, $userid = null, $doanything = true,
|
|
|
4271 |
$coursefieldsexceptid = '', $categoryfieldsexceptid = '', $courseorderby = '',
|
|
|
4272 |
$categoryorderby = '', $limit = 0): array {
|
|
|
4273 |
global $DB, $USER;
|
|
|
4274 |
|
|
|
4275 |
// Default to current user.
|
|
|
4276 |
if (!$userid) {
|
|
|
4277 |
$userid = $USER->id;
|
|
|
4278 |
}
|
|
|
4279 |
|
|
|
4280 |
if (!$capinfo = get_capability_info($capability)) {
|
|
|
4281 |
debugging('Capability "'.$capability.'" was not found! This has to be fixed in code.');
|
|
|
4282 |
return [false, false];
|
|
|
4283 |
}
|
|
|
4284 |
|
|
|
4285 |
if ($doanything && is_siteadmin($userid)) {
|
|
|
4286 |
// If the user is a site admin and $doanything is enabled then there is no need to restrict
|
|
|
4287 |
// the list of courses.
|
|
|
4288 |
$contextlimitsql = '';
|
|
|
4289 |
$contextlimitparams = [];
|
|
|
4290 |
} else {
|
|
|
4291 |
// Gets SQL to limit contexts ('x' table) to those where the user has this capability.
|
|
|
4292 |
list ($contextlimitsql, $contextlimitparams) = \core\access\get_user_capability_course_helper::get_sql(
|
|
|
4293 |
$userid, $capinfo->name);
|
|
|
4294 |
if (!$contextlimitsql) {
|
|
|
4295 |
// If the does not have this capability in any context, return false without querying.
|
|
|
4296 |
return [false, false];
|
|
|
4297 |
}
|
|
|
4298 |
|
|
|
4299 |
$contextlimitsql = 'WHERE' . $contextlimitsql;
|
|
|
4300 |
}
|
|
|
4301 |
|
|
|
4302 |
$categories = [];
|
|
|
4303 |
if ($getcategories) {
|
|
|
4304 |
$fieldlist = \core\access\get_user_capability_course_helper::map_fieldnames($categoryfieldsexceptid);
|
|
|
4305 |
if ($categoryorderby) {
|
|
|
4306 |
$fields = explode(',', $categoryorderby);
|
|
|
4307 |
$categoryorderby = '';
|
|
|
4308 |
foreach ($fields as $field) {
|
|
|
4309 |
if ($categoryorderby) {
|
|
|
4310 |
$categoryorderby .= ',';
|
|
|
4311 |
}
|
|
|
4312 |
$categoryorderby .= 'c.'.$field;
|
|
|
4313 |
}
|
|
|
4314 |
$categoryorderby = 'ORDER BY '.$categoryorderby;
|
|
|
4315 |
}
|
|
|
4316 |
$rs = $DB->get_recordset_sql("
|
|
|
4317 |
SELECT c.id $fieldlist
|
|
|
4318 |
FROM {course_categories} c
|
|
|
4319 |
JOIN {context} x ON c.id = x.instanceid AND x.contextlevel = ?
|
|
|
4320 |
$contextlimitsql
|
|
|
4321 |
$categoryorderby", array_merge([CONTEXT_COURSECAT], $contextlimitparams));
|
|
|
4322 |
$basedlimit = $limit;
|
|
|
4323 |
foreach ($rs as $category) {
|
|
|
4324 |
$categories[] = $category;
|
|
|
4325 |
$basedlimit--;
|
|
|
4326 |
if ($basedlimit == 0) {
|
|
|
4327 |
break;
|
|
|
4328 |
}
|
|
|
4329 |
}
|
|
|
4330 |
$rs->close();
|
|
|
4331 |
}
|
|
|
4332 |
|
|
|
4333 |
$courses = [];
|
|
|
4334 |
$fieldlist = \core\access\get_user_capability_course_helper::map_fieldnames($coursefieldsexceptid);
|
|
|
4335 |
if ($courseorderby) {
|
|
|
4336 |
$fields = explode(',', $courseorderby);
|
|
|
4337 |
$courseorderby = '';
|
|
|
4338 |
foreach ($fields as $field) {
|
|
|
4339 |
if ($courseorderby) {
|
|
|
4340 |
$courseorderby .= ',';
|
|
|
4341 |
}
|
|
|
4342 |
$courseorderby .= 'c.'.$field;
|
|
|
4343 |
}
|
|
|
4344 |
$courseorderby = 'ORDER BY '.$courseorderby;
|
|
|
4345 |
}
|
|
|
4346 |
$rs = $DB->get_recordset_sql("
|
|
|
4347 |
SELECT c.id $fieldlist
|
|
|
4348 |
FROM {course} c
|
|
|
4349 |
JOIN {context} x ON c.id = x.instanceid AND x.contextlevel = ?
|
|
|
4350 |
$contextlimitsql
|
|
|
4351 |
$courseorderby", array_merge([CONTEXT_COURSE], $contextlimitparams));
|
|
|
4352 |
foreach ($rs as $course) {
|
|
|
4353 |
$courses[] = $course;
|
|
|
4354 |
$limit--;
|
|
|
4355 |
if ($limit == 0) {
|
|
|
4356 |
break;
|
|
|
4357 |
}
|
|
|
4358 |
}
|
|
|
4359 |
$rs->close();
|
|
|
4360 |
return [$categories, $courses];
|
|
|
4361 |
}
|
|
|
4362 |
|
|
|
4363 |
/**
|
|
|
4364 |
* This function gets the list of courses that this user has a particular capability in.
|
|
|
4365 |
*
|
|
|
4366 |
* It is now reasonably efficient, but bear in mind that if there are users who have the capability
|
|
|
4367 |
* everywhere, it may return an array of all courses.
|
|
|
4368 |
*
|
|
|
4369 |
* @param string $capability Capability in question
|
|
|
4370 |
* @param int $userid User ID or null for current user
|
|
|
4371 |
* @param bool $doanything True if 'doanything' is permitted (default)
|
|
|
4372 |
* @param string $fieldsexceptid Leave blank if you only need 'id' in the course records;
|
|
|
4373 |
* otherwise use a comma-separated list of the fields you require, not including id.
|
|
|
4374 |
* Add ctxid, ctxpath, ctxdepth etc to return course context information for preloading.
|
|
|
4375 |
* @param string $orderby If set, use a comma-separated list of fields from course
|
|
|
4376 |
* table with sql modifiers (DESC) if needed
|
|
|
4377 |
* @param int $limit Limit the number of courses to return on success. Zero equals all entries.
|
|
|
4378 |
* @return array|bool Array of courses, if none found false is returned.
|
|
|
4379 |
*/
|
|
|
4380 |
function get_user_capability_course($capability, $userid = null, $doanything = true, $fieldsexceptid = '',
|
|
|
4381 |
$orderby = '', $limit = 0) {
|
|
|
4382 |
list($categories, $courses) = get_user_capability_contexts(
|
|
|
4383 |
$capability,
|
|
|
4384 |
false,
|
|
|
4385 |
$userid,
|
|
|
4386 |
$doanything,
|
|
|
4387 |
$fieldsexceptid,
|
|
|
4388 |
'',
|
|
|
4389 |
$orderby,
|
|
|
4390 |
'',
|
|
|
4391 |
$limit
|
|
|
4392 |
);
|
|
|
4393 |
return $courses;
|
|
|
4394 |
}
|
|
|
4395 |
|
|
|
4396 |
/**
|
|
|
4397 |
* Switches the current user to another role for the current session and only
|
|
|
4398 |
* in the given context.
|
|
|
4399 |
*
|
|
|
4400 |
* The caller *must* check
|
|
|
4401 |
* - that this op is allowed
|
|
|
4402 |
* - that the requested role can be switched to in this context (use get_switchable_roles)
|
|
|
4403 |
* - that the requested role is NOT $CFG->defaultuserroleid
|
|
|
4404 |
*
|
|
|
4405 |
* To "unswitch" pass 0 as the roleid.
|
|
|
4406 |
*
|
|
|
4407 |
* This function *will* modify $USER->access - beware
|
|
|
4408 |
*
|
|
|
4409 |
* @param integer $roleid the role to switch to.
|
|
|
4410 |
* @param context $context the context in which to perform the switch.
|
|
|
4411 |
* @return bool success or failure.
|
|
|
4412 |
*/
|
|
|
4413 |
function role_switch($roleid, context $context) {
|
|
|
4414 |
global $USER;
|
|
|
4415 |
|
|
|
4416 |
// Add the ghost RA to $USER->access as $USER->access['rsw'][$path] = $roleid.
|
|
|
4417 |
// To un-switch just unset($USER->access['rsw'][$path]).
|
|
|
4418 |
//
|
|
|
4419 |
// Note: it is not possible to switch to roles that do not have course:view
|
|
|
4420 |
|
|
|
4421 |
if (!isset($USER->access)) {
|
|
|
4422 |
load_all_capabilities();
|
|
|
4423 |
}
|
|
|
4424 |
|
|
|
4425 |
// Add the switch RA
|
|
|
4426 |
if ($roleid == 0) {
|
|
|
4427 |
unset($USER->access['rsw'][$context->path]);
|
|
|
4428 |
return true;
|
|
|
4429 |
}
|
|
|
4430 |
|
|
|
4431 |
$USER->access['rsw'][$context->path] = $roleid;
|
|
|
4432 |
|
| 1441 |
ariadna |
4433 |
// Dispatch the hook for post user switch.
|
|
|
4434 |
$hook = new \core\hook\access\after_role_switched(
|
|
|
4435 |
context: $context,
|
|
|
4436 |
roleid: $roleid
|
|
|
4437 |
);
|
|
|
4438 |
\core\di::get(\core\hook\manager::class)->dispatch($hook);
|
| 1 |
efrain |
4439 |
return true;
|
|
|
4440 |
}
|
|
|
4441 |
|
|
|
4442 |
/**
|
|
|
4443 |
* Checks if the user has switched roles within the given course.
|
|
|
4444 |
*
|
|
|
4445 |
* Note: You can only switch roles within the course, hence it takes a course id
|
|
|
4446 |
* rather than a context. On that note Petr volunteered to implement this across
|
|
|
4447 |
* all other contexts, all requests for this should be forwarded to him ;)
|
|
|
4448 |
*
|
|
|
4449 |
* @param int $courseid The id of the course to check
|
|
|
4450 |
* @return bool True if the user has switched roles within the course.
|
|
|
4451 |
*/
|
|
|
4452 |
function is_role_switched($courseid) {
|
|
|
4453 |
global $USER;
|
|
|
4454 |
$context = context_course::instance($courseid, MUST_EXIST);
|
|
|
4455 |
return (!empty($USER->access['rsw'][$context->path]));
|
|
|
4456 |
}
|
|
|
4457 |
|
|
|
4458 |
/**
|
|
|
4459 |
* Get any role that has an override on exact context
|
|
|
4460 |
*
|
|
|
4461 |
* @param context $context The context to check
|
|
|
4462 |
* @return array An array of roles
|
|
|
4463 |
*/
|
|
|
4464 |
function get_roles_with_override_on_context(context $context) {
|
|
|
4465 |
global $DB;
|
|
|
4466 |
|
|
|
4467 |
return $DB->get_records_sql("SELECT r.*
|
|
|
4468 |
FROM {role_capabilities} rc, {role} r
|
|
|
4469 |
WHERE rc.roleid = r.id AND rc.contextid = ?",
|
|
|
4470 |
array($context->id));
|
|
|
4471 |
}
|
|
|
4472 |
|
|
|
4473 |
/**
|
|
|
4474 |
* Get all capabilities for this role on this context (overrides)
|
|
|
4475 |
*
|
|
|
4476 |
* @param stdClass $role
|
|
|
4477 |
* @param context $context
|
|
|
4478 |
* @return array
|
|
|
4479 |
*/
|
|
|
4480 |
function get_capabilities_from_role_on_context($role, context $context) {
|
|
|
4481 |
global $DB;
|
|
|
4482 |
|
|
|
4483 |
return $DB->get_records_sql("SELECT *
|
|
|
4484 |
FROM {role_capabilities}
|
|
|
4485 |
WHERE contextid = ? AND roleid = ?",
|
|
|
4486 |
array($context->id, $role->id));
|
|
|
4487 |
}
|
|
|
4488 |
|
|
|
4489 |
/**
|
|
|
4490 |
* Find all user assignment of users for this role, on this context
|
|
|
4491 |
*
|
|
|
4492 |
* @param stdClass $role
|
|
|
4493 |
* @param context $context
|
|
|
4494 |
* @return array
|
|
|
4495 |
*/
|
|
|
4496 |
function get_users_from_role_on_context($role, context $context) {
|
|
|
4497 |
global $DB;
|
|
|
4498 |
|
|
|
4499 |
return $DB->get_records_sql("SELECT *
|
|
|
4500 |
FROM {role_assignments}
|
|
|
4501 |
WHERE contextid = ? AND roleid = ?",
|
|
|
4502 |
array($context->id, $role->id));
|
|
|
4503 |
}
|
|
|
4504 |
|
|
|
4505 |
/**
|
|
|
4506 |
* Simple function returning a boolean true if user has roles
|
|
|
4507 |
* in context or parent contexts, otherwise false.
|
|
|
4508 |
*
|
|
|
4509 |
* @param int $userid
|
|
|
4510 |
* @param int $roleid
|
|
|
4511 |
* @param int $contextid empty means any context
|
|
|
4512 |
* @return bool
|
|
|
4513 |
*/
|
|
|
4514 |
function user_has_role_assignment($userid, $roleid, $contextid = 0) {
|
|
|
4515 |
global $DB;
|
|
|
4516 |
|
|
|
4517 |
if ($contextid) {
|
|
|
4518 |
if (!$context = context::instance_by_id($contextid, IGNORE_MISSING)) {
|
|
|
4519 |
return false;
|
|
|
4520 |
}
|
|
|
4521 |
$parents = $context->get_parent_context_ids(true);
|
|
|
4522 |
list($contexts, $params) = $DB->get_in_or_equal($parents, SQL_PARAMS_NAMED, 'r');
|
|
|
4523 |
$params['userid'] = $userid;
|
|
|
4524 |
$params['roleid'] = $roleid;
|
|
|
4525 |
|
|
|
4526 |
$sql = "SELECT COUNT(ra.id)
|
|
|
4527 |
FROM {role_assignments} ra
|
|
|
4528 |
WHERE ra.userid = :userid AND ra.roleid = :roleid AND ra.contextid $contexts";
|
|
|
4529 |
|
|
|
4530 |
$count = $DB->get_field_sql($sql, $params);
|
|
|
4531 |
return ($count > 0);
|
|
|
4532 |
|
|
|
4533 |
} else {
|
|
|
4534 |
return $DB->record_exists('role_assignments', array('userid'=>$userid, 'roleid'=>$roleid));
|
|
|
4535 |
}
|
|
|
4536 |
}
|
|
|
4537 |
|
|
|
4538 |
/**
|
|
|
4539 |
* Get localised role name or alias if exists and format the text.
|
|
|
4540 |
*
|
|
|
4541 |
* @param stdClass $role role object
|
|
|
4542 |
* - optional 'coursealias' property should be included for performance reasons if course context used
|
|
|
4543 |
* - description property is not required here
|
|
|
4544 |
* @param context|bool $context empty means system context
|
|
|
4545 |
* @param int $rolenamedisplay type of role name
|
|
|
4546 |
* @return string localised role name or course role name alias
|
|
|
4547 |
*/
|
|
|
4548 |
function role_get_name(stdClass $role, $context = null, $rolenamedisplay = ROLENAME_ALIAS) {
|
|
|
4549 |
global $DB;
|
|
|
4550 |
|
|
|
4551 |
if ($rolenamedisplay == ROLENAME_SHORT) {
|
|
|
4552 |
return $role->shortname;
|
|
|
4553 |
}
|
|
|
4554 |
|
|
|
4555 |
if (!$context or !$coursecontext = $context->get_course_context(false)) {
|
|
|
4556 |
$coursecontext = null;
|
|
|
4557 |
}
|
|
|
4558 |
|
|
|
4559 |
if ($coursecontext and !property_exists($role, 'coursealias') and ($rolenamedisplay == ROLENAME_ALIAS or $rolenamedisplay == ROLENAME_BOTH or $rolenamedisplay == ROLENAME_ALIAS_RAW)) {
|
|
|
4560 |
$role = clone($role); // Do not modify parameters.
|
|
|
4561 |
if ($r = $DB->get_record('role_names', array('roleid'=>$role->id, 'contextid'=>$coursecontext->id))) {
|
|
|
4562 |
$role->coursealias = $r->name;
|
|
|
4563 |
} else {
|
|
|
4564 |
$role->coursealias = null;
|
|
|
4565 |
}
|
|
|
4566 |
}
|
|
|
4567 |
|
|
|
4568 |
if ($rolenamedisplay == ROLENAME_ALIAS_RAW) {
|
|
|
4569 |
if ($coursecontext) {
|
|
|
4570 |
return $role->coursealias;
|
|
|
4571 |
} else {
|
|
|
4572 |
return null;
|
|
|
4573 |
}
|
|
|
4574 |
}
|
|
|
4575 |
|
|
|
4576 |
if (trim($role->name) !== '') {
|
|
|
4577 |
// For filtering always use context where was the thing defined - system for roles here.
|
|
|
4578 |
$original = format_string($role->name, true, array('context'=>context_system::instance()));
|
|
|
4579 |
|
|
|
4580 |
} else {
|
|
|
4581 |
// Empty role->name means we want to see localised role name based on shortname,
|
|
|
4582 |
// only default roles are supposed to be localised.
|
|
|
4583 |
switch ($role->shortname) {
|
|
|
4584 |
case 'manager': $original = get_string('manager', 'role'); break;
|
|
|
4585 |
case 'coursecreator': $original = get_string('coursecreators'); break;
|
|
|
4586 |
case 'editingteacher': $original = get_string('defaultcourseteacher'); break;
|
|
|
4587 |
case 'teacher': $original = get_string('noneditingteacher'); break;
|
|
|
4588 |
case 'student': $original = get_string('defaultcoursestudent'); break;
|
|
|
4589 |
case 'guest': $original = get_string('guest'); break;
|
|
|
4590 |
case 'user': $original = get_string('authenticateduser'); break;
|
|
|
4591 |
case 'frontpage': $original = get_string('frontpageuser', 'role'); break;
|
|
|
4592 |
// We should not get here, the role UI should require the name for custom roles!
|
|
|
4593 |
default: $original = $role->shortname; break;
|
|
|
4594 |
}
|
|
|
4595 |
}
|
|
|
4596 |
|
|
|
4597 |
if ($rolenamedisplay == ROLENAME_ORIGINAL) {
|
|
|
4598 |
return $original;
|
|
|
4599 |
}
|
|
|
4600 |
|
|
|
4601 |
if ($rolenamedisplay == ROLENAME_ORIGINALANDSHORT) {
|
|
|
4602 |
return "$original ($role->shortname)";
|
|
|
4603 |
}
|
|
|
4604 |
|
|
|
4605 |
if ($rolenamedisplay == ROLENAME_ALIAS) {
|
|
|
4606 |
if ($coursecontext && $role->coursealias && trim($role->coursealias) !== '') {
|
|
|
4607 |
return format_string($role->coursealias, true, array('context'=>$coursecontext));
|
|
|
4608 |
} else {
|
|
|
4609 |
return $original;
|
|
|
4610 |
}
|
|
|
4611 |
}
|
|
|
4612 |
|
|
|
4613 |
if ($rolenamedisplay == ROLENAME_BOTH) {
|
|
|
4614 |
if ($coursecontext && $role->coursealias && trim($role->coursealias) !== '') {
|
|
|
4615 |
return format_string($role->coursealias, true, array('context'=>$coursecontext)) . " ($original)";
|
|
|
4616 |
} else {
|
|
|
4617 |
return $original;
|
|
|
4618 |
}
|
|
|
4619 |
}
|
|
|
4620 |
|
|
|
4621 |
throw new coding_exception('Invalid $rolenamedisplay parameter specified in role_get_name()');
|
|
|
4622 |
}
|
|
|
4623 |
|
|
|
4624 |
/**
|
|
|
4625 |
* Returns localised role description if available.
|
|
|
4626 |
* If the name is empty it tries to find the default role name using
|
|
|
4627 |
* hardcoded list of default role names or other methods in the future.
|
|
|
4628 |
*
|
|
|
4629 |
* @param stdClass $role
|
|
|
4630 |
* @return string localised role name
|
|
|
4631 |
*/
|
|
|
4632 |
function role_get_description(stdClass $role) {
|
|
|
4633 |
if (!html_is_blank($role->description)) {
|
|
|
4634 |
return format_text($role->description, FORMAT_HTML, array('context'=>context_system::instance()));
|
|
|
4635 |
}
|
|
|
4636 |
|
|
|
4637 |
switch ($role->shortname) {
|
|
|
4638 |
case 'manager': return get_string('managerdescription', 'role');
|
|
|
4639 |
case 'coursecreator': return get_string('coursecreatorsdescription');
|
|
|
4640 |
case 'editingteacher': return get_string('defaultcourseteacherdescription');
|
|
|
4641 |
case 'teacher': return get_string('noneditingteacherdescription');
|
|
|
4642 |
case 'student': return get_string('defaultcoursestudentdescription');
|
|
|
4643 |
case 'guest': return get_string('guestdescription');
|
|
|
4644 |
case 'user': return get_string('authenticateduserdescription');
|
|
|
4645 |
case 'frontpage': return get_string('frontpageuserdescription', 'role');
|
|
|
4646 |
default: return '';
|
|
|
4647 |
}
|
|
|
4648 |
}
|
|
|
4649 |
|
|
|
4650 |
/**
|
|
|
4651 |
* Get all the localised role names for a context.
|
|
|
4652 |
*
|
|
|
4653 |
* In new installs default roles have empty names, this function
|
|
|
4654 |
* add localised role names using current language pack.
|
|
|
4655 |
*
|
|
|
4656 |
* @param context $context the context, null means system context
|
|
|
4657 |
* @param array of role objects with a ->localname field containing the context-specific role name.
|
|
|
4658 |
* @param int $rolenamedisplay
|
|
|
4659 |
* @param bool $returnmenu true means id=>localname, false means id=>rolerecord
|
|
|
4660 |
* @return array Array of context-specific role names, or role objects with a ->localname field added.
|
|
|
4661 |
*/
|
| 1441 |
ariadna |
4662 |
function role_get_names(?context $context = null, $rolenamedisplay = ROLENAME_ALIAS, $returnmenu = null) {
|
| 1 |
efrain |
4663 |
return role_fix_names(get_all_roles($context), $context, $rolenamedisplay, $returnmenu);
|
|
|
4664 |
}
|
|
|
4665 |
|
|
|
4666 |
/**
|
|
|
4667 |
* Prepare list of roles for display, apply aliases and localise default role names.
|
|
|
4668 |
*
|
|
|
4669 |
* @param array $roleoptions array roleid => roleobject (with optional coursealias), strings are accepted for backwards compatibility only
|
|
|
4670 |
* @param context $context the context, null means system context
|
|
|
4671 |
* @param int $rolenamedisplay
|
|
|
4672 |
* @param bool $returnmenu null means keep the same format as $roleoptions, true means id=>localname, false means id=>rolerecord
|
|
|
4673 |
* @return array Array of context-specific role names, or role objects with a ->localname field added.
|
|
|
4674 |
*/
|
| 1441 |
ariadna |
4675 |
function role_fix_names($roleoptions, ?context $context = null, $rolenamedisplay = ROLENAME_ALIAS, $returnmenu = null) {
|
| 1 |
efrain |
4676 |
global $DB;
|
|
|
4677 |
|
|
|
4678 |
if (empty($roleoptions)) {
|
|
|
4679 |
return array();
|
|
|
4680 |
}
|
|
|
4681 |
|
|
|
4682 |
if (!$context or !$coursecontext = $context->get_course_context(false)) {
|
|
|
4683 |
$coursecontext = null;
|
|
|
4684 |
}
|
|
|
4685 |
|
|
|
4686 |
// We usually need all role columns...
|
|
|
4687 |
$first = reset($roleoptions);
|
|
|
4688 |
if ($returnmenu === null) {
|
|
|
4689 |
$returnmenu = !is_object($first);
|
|
|
4690 |
}
|
|
|
4691 |
|
|
|
4692 |
if (!is_object($first) or !property_exists($first, 'shortname')) {
|
|
|
4693 |
$allroles = get_all_roles($context);
|
|
|
4694 |
foreach ($roleoptions as $rid => $unused) {
|
|
|
4695 |
$roleoptions[$rid] = $allroles[$rid];
|
|
|
4696 |
}
|
|
|
4697 |
}
|
|
|
4698 |
|
|
|
4699 |
// Inject coursealias if necessary.
|
|
|
4700 |
if ($coursecontext and ($rolenamedisplay == ROLENAME_ALIAS_RAW or $rolenamedisplay == ROLENAME_ALIAS or $rolenamedisplay == ROLENAME_BOTH)) {
|
|
|
4701 |
$first = reset($roleoptions);
|
|
|
4702 |
if (!property_exists($first, 'coursealias')) {
|
|
|
4703 |
$aliasnames = $DB->get_records('role_names', array('contextid'=>$coursecontext->id));
|
|
|
4704 |
foreach ($aliasnames as $alias) {
|
|
|
4705 |
if (isset($roleoptions[$alias->roleid])) {
|
|
|
4706 |
$roleoptions[$alias->roleid]->coursealias = $alias->name;
|
|
|
4707 |
}
|
|
|
4708 |
}
|
|
|
4709 |
}
|
|
|
4710 |
}
|
|
|
4711 |
|
|
|
4712 |
// Add localname property.
|
|
|
4713 |
foreach ($roleoptions as $rid => $role) {
|
|
|
4714 |
$roleoptions[$rid]->localname = role_get_name($role, $coursecontext, $rolenamedisplay);
|
|
|
4715 |
}
|
|
|
4716 |
|
|
|
4717 |
if (!$returnmenu) {
|
|
|
4718 |
return $roleoptions;
|
|
|
4719 |
}
|
|
|
4720 |
|
|
|
4721 |
$menu = array();
|
|
|
4722 |
foreach ($roleoptions as $rid => $role) {
|
|
|
4723 |
$menu[$rid] = $role->localname;
|
|
|
4724 |
}
|
|
|
4725 |
|
|
|
4726 |
return $menu;
|
|
|
4727 |
}
|
|
|
4728 |
|
|
|
4729 |
/**
|
|
|
4730 |
* Aids in detecting if a new line is required when reading a new capability
|
|
|
4731 |
*
|
|
|
4732 |
* This function helps admin/roles/manage.php etc to detect if a new line should be printed
|
|
|
4733 |
* when we read in a new capability.
|
|
|
4734 |
* Most of the time, if the 2 components are different we should print a new line, (e.g. course system->rss client)
|
|
|
4735 |
* but when we are in grade, all reports/import/export capabilities should be together
|
|
|
4736 |
*
|
|
|
4737 |
* @param stdClass $cap component string a
|
|
|
4738 |
* @param string $comp component string b
|
|
|
4739 |
* @param int $contextlevel
|
|
|
4740 |
* @return bool whether 2 component are in different "sections"
|
|
|
4741 |
*/
|
|
|
4742 |
function component_level_changed($cap, $comp, $contextlevel) {
|
|
|
4743 |
|
|
|
4744 |
if (strstr($cap->component, '/') && strstr($comp, '/')) {
|
|
|
4745 |
$compsa = explode('/', $cap->component);
|
|
|
4746 |
$compsb = explode('/', $comp);
|
|
|
4747 |
|
|
|
4748 |
// list of system reports
|
|
|
4749 |
if (($compsa[0] == 'report') && ($compsb[0] == 'report')) {
|
|
|
4750 |
return false;
|
|
|
4751 |
}
|
|
|
4752 |
|
|
|
4753 |
// we are in gradebook, still
|
|
|
4754 |
if (($compsa[0] == 'gradeexport' || $compsa[0] == 'gradeimport' || $compsa[0] == 'gradereport') &&
|
|
|
4755 |
($compsb[0] == 'gradeexport' || $compsb[0] == 'gradeimport' || $compsb[0] == 'gradereport')) {
|
|
|
4756 |
return false;
|
|
|
4757 |
}
|
|
|
4758 |
|
|
|
4759 |
if (($compsa[0] == 'coursereport') && ($compsb[0] == 'coursereport')) {
|
|
|
4760 |
return false;
|
|
|
4761 |
}
|
|
|
4762 |
}
|
|
|
4763 |
|
|
|
4764 |
return ($cap->component != $comp || $cap->contextlevel != $contextlevel);
|
|
|
4765 |
}
|
|
|
4766 |
|
|
|
4767 |
/**
|
|
|
4768 |
* Fix the roles.sortorder field in the database, so it contains sequential integers,
|
|
|
4769 |
* and return an array of roleids in order.
|
|
|
4770 |
*
|
|
|
4771 |
* @param array $allroles array of roles, as returned by get_all_roles();
|
|
|
4772 |
* @return array $role->sortorder =-> $role->id with the keys in ascending order.
|
|
|
4773 |
*/
|
|
|
4774 |
function fix_role_sortorder($allroles) {
|
|
|
4775 |
global $DB;
|
|
|
4776 |
|
|
|
4777 |
$rolesort = array();
|
|
|
4778 |
$i = 0;
|
|
|
4779 |
foreach ($allroles as $role) {
|
|
|
4780 |
$rolesort[$i] = $role->id;
|
|
|
4781 |
if ($role->sortorder != $i) {
|
|
|
4782 |
$r = new stdClass();
|
|
|
4783 |
$r->id = $role->id;
|
|
|
4784 |
$r->sortorder = $i;
|
|
|
4785 |
$DB->update_record('role', $r);
|
|
|
4786 |
$allroles[$role->id]->sortorder = $i;
|
|
|
4787 |
}
|
|
|
4788 |
$i++;
|
|
|
4789 |
}
|
|
|
4790 |
return $rolesort;
|
|
|
4791 |
}
|
|
|
4792 |
|
|
|
4793 |
/**
|
|
|
4794 |
* Switch the sort order of two roles (used in admin/roles/manage.php).
|
|
|
4795 |
*
|
|
|
4796 |
* @param stdClass $first The first role. Actually, only ->sortorder is used.
|
|
|
4797 |
* @param stdClass $second The second role. Actually, only ->sortorder is used.
|
|
|
4798 |
* @return boolean success or failure
|
|
|
4799 |
*/
|
|
|
4800 |
function switch_roles($first, $second) {
|
|
|
4801 |
global $DB;
|
|
|
4802 |
$temp = $DB->get_field('role', 'MAX(sortorder) + 1', array());
|
|
|
4803 |
$result = $DB->set_field('role', 'sortorder', $temp, array('sortorder' => $first->sortorder));
|
|
|
4804 |
$result = $result && $DB->set_field('role', 'sortorder', $first->sortorder, array('sortorder' => $second->sortorder));
|
|
|
4805 |
$result = $result && $DB->set_field('role', 'sortorder', $second->sortorder, array('sortorder' => $temp));
|
|
|
4806 |
return $result;
|
|
|
4807 |
}
|
|
|
4808 |
|
|
|
4809 |
/**
|
|
|
4810 |
* Duplicates all the base definitions of a role
|
|
|
4811 |
*
|
|
|
4812 |
* @param stdClass $sourcerole role to copy from
|
|
|
4813 |
* @param int $targetrole id of role to copy to
|
|
|
4814 |
*/
|
|
|
4815 |
function role_cap_duplicate($sourcerole, $targetrole) {
|
|
|
4816 |
global $DB;
|
|
|
4817 |
|
|
|
4818 |
$systemcontext = context_system::instance();
|
|
|
4819 |
$caps = $DB->get_records_sql("SELECT *
|
|
|
4820 |
FROM {role_capabilities}
|
|
|
4821 |
WHERE roleid = ? AND contextid = ?",
|
|
|
4822 |
array($sourcerole->id, $systemcontext->id));
|
|
|
4823 |
// adding capabilities
|
|
|
4824 |
foreach ($caps as $cap) {
|
|
|
4825 |
unset($cap->id);
|
|
|
4826 |
$cap->roleid = $targetrole;
|
|
|
4827 |
$DB->insert_record('role_capabilities', $cap);
|
|
|
4828 |
}
|
|
|
4829 |
|
|
|
4830 |
// Reset any cache of this role, including MUC.
|
|
|
4831 |
accesslib_clear_role_cache($targetrole);
|
|
|
4832 |
}
|
|
|
4833 |
|
|
|
4834 |
/**
|
|
|
4835 |
* Returns two lists, this can be used to find out if user has capability.
|
|
|
4836 |
* Having any needed role and no forbidden role in this context means
|
|
|
4837 |
* user has this capability in this context.
|
|
|
4838 |
* Use get_role_names_with_cap_in_context() if you need role names to display in the UI
|
|
|
4839 |
*
|
|
|
4840 |
* @param stdClass $context
|
|
|
4841 |
* @param string $capability
|
|
|
4842 |
* @return array($neededroles, $forbiddenroles)
|
|
|
4843 |
*/
|
|
|
4844 |
function get_roles_with_cap_in_context($context, $capability) {
|
|
|
4845 |
global $DB;
|
|
|
4846 |
|
|
|
4847 |
$ctxids = trim($context->path, '/'); // kill leading slash
|
|
|
4848 |
$ctxids = str_replace('/', ',', $ctxids);
|
|
|
4849 |
|
|
|
4850 |
$sql = "SELECT rc.id, rc.roleid, rc.permission, ctx.depth
|
|
|
4851 |
FROM {role_capabilities} rc
|
|
|
4852 |
JOIN {context} ctx ON ctx.id = rc.contextid
|
|
|
4853 |
JOIN {capabilities} cap ON rc.capability = cap.name
|
|
|
4854 |
WHERE rc.capability = :cap AND ctx.id IN ($ctxids)
|
|
|
4855 |
ORDER BY rc.roleid ASC, ctx.depth DESC";
|
|
|
4856 |
$params = array('cap'=>$capability);
|
|
|
4857 |
|
|
|
4858 |
if (!$capdefs = $DB->get_records_sql($sql, $params)) {
|
|
|
4859 |
// no cap definitions --> no capability
|
|
|
4860 |
return array(array(), array());
|
|
|
4861 |
}
|
|
|
4862 |
|
|
|
4863 |
$forbidden = array();
|
|
|
4864 |
$needed = array();
|
|
|
4865 |
foreach ($capdefs as $def) {
|
|
|
4866 |
if (isset($forbidden[$def->roleid])) {
|
|
|
4867 |
continue;
|
|
|
4868 |
}
|
|
|
4869 |
if ($def->permission == CAP_PROHIBIT) {
|
|
|
4870 |
$forbidden[$def->roleid] = $def->roleid;
|
|
|
4871 |
unset($needed[$def->roleid]);
|
|
|
4872 |
continue;
|
|
|
4873 |
}
|
|
|
4874 |
if (!isset($needed[$def->roleid])) {
|
|
|
4875 |
if ($def->permission == CAP_ALLOW) {
|
|
|
4876 |
$needed[$def->roleid] = true;
|
|
|
4877 |
} else if ($def->permission == CAP_PREVENT) {
|
|
|
4878 |
$needed[$def->roleid] = false;
|
|
|
4879 |
}
|
|
|
4880 |
}
|
|
|
4881 |
}
|
|
|
4882 |
unset($capdefs);
|
|
|
4883 |
|
|
|
4884 |
// remove all those roles not allowing
|
|
|
4885 |
foreach ($needed as $key=>$value) {
|
|
|
4886 |
if (!$value) {
|
|
|
4887 |
unset($needed[$key]);
|
|
|
4888 |
} else {
|
|
|
4889 |
$needed[$key] = $key;
|
|
|
4890 |
}
|
|
|
4891 |
}
|
|
|
4892 |
|
|
|
4893 |
return array($needed, $forbidden);
|
|
|
4894 |
}
|
|
|
4895 |
|
|
|
4896 |
/**
|
|
|
4897 |
* Returns an array of role IDs that have ALL of the the supplied capabilities
|
|
|
4898 |
* Uses get_roles_with_cap_in_context(). Returns $allowed minus $forbidden
|
|
|
4899 |
*
|
|
|
4900 |
* @param stdClass $context
|
|
|
4901 |
* @param array $capabilities An array of capabilities
|
|
|
4902 |
* @return array of roles with all of the required capabilities
|
|
|
4903 |
*/
|
|
|
4904 |
function get_roles_with_caps_in_context($context, $capabilities) {
|
|
|
4905 |
$neededarr = array();
|
|
|
4906 |
$forbiddenarr = array();
|
|
|
4907 |
foreach ($capabilities as $caprequired) {
|
|
|
4908 |
list($neededarr[], $forbiddenarr[]) = get_roles_with_cap_in_context($context, $caprequired);
|
|
|
4909 |
}
|
|
|
4910 |
|
|
|
4911 |
$rolesthatcanrate = array();
|
|
|
4912 |
if (!empty($neededarr)) {
|
|
|
4913 |
foreach ($neededarr as $needed) {
|
|
|
4914 |
if (empty($rolesthatcanrate)) {
|
|
|
4915 |
$rolesthatcanrate = $needed;
|
|
|
4916 |
} else {
|
|
|
4917 |
//only want roles that have all caps
|
|
|
4918 |
$rolesthatcanrate = array_intersect_key($rolesthatcanrate,$needed);
|
|
|
4919 |
}
|
|
|
4920 |
}
|
|
|
4921 |
}
|
|
|
4922 |
if (!empty($forbiddenarr) && !empty($rolesthatcanrate)) {
|
|
|
4923 |
foreach ($forbiddenarr as $forbidden) {
|
|
|
4924 |
//remove any roles that are forbidden any of the caps
|
|
|
4925 |
$rolesthatcanrate = array_diff($rolesthatcanrate, $forbidden);
|
|
|
4926 |
}
|
|
|
4927 |
}
|
|
|
4928 |
return $rolesthatcanrate;
|
|
|
4929 |
}
|
|
|
4930 |
|
|
|
4931 |
/**
|
|
|
4932 |
* Returns an array of role names that have ALL of the the supplied capabilities
|
|
|
4933 |
* Uses get_roles_with_caps_in_context(). Returns $allowed minus $forbidden
|
|
|
4934 |
*
|
|
|
4935 |
* @param stdClass $context
|
|
|
4936 |
* @param array $capabilities An array of capabilities
|
|
|
4937 |
* @return array of roles with all of the required capabilities
|
|
|
4938 |
*/
|
|
|
4939 |
function get_role_names_with_caps_in_context($context, $capabilities) {
|
|
|
4940 |
global $DB;
|
|
|
4941 |
|
|
|
4942 |
$rolesthatcanrate = get_roles_with_caps_in_context($context, $capabilities);
|
|
|
4943 |
$allroles = $DB->get_records('role', null, 'sortorder DESC');
|
|
|
4944 |
|
|
|
4945 |
$roles = array();
|
|
|
4946 |
foreach ($rolesthatcanrate as $r) {
|
|
|
4947 |
$roles[$r] = $allroles[$r];
|
|
|
4948 |
}
|
|
|
4949 |
|
|
|
4950 |
return role_fix_names($roles, $context, ROLENAME_ALIAS, true);
|
|
|
4951 |
}
|
|
|
4952 |
|
|
|
4953 |
/**
|
|
|
4954 |
* This function verifies the prohibit comes from this context
|
|
|
4955 |
* and there are no more prohibits in parent contexts.
|
|
|
4956 |
*
|
|
|
4957 |
* @param int $roleid
|
|
|
4958 |
* @param context $context
|
|
|
4959 |
* @param string $capability name
|
|
|
4960 |
* @return bool
|
|
|
4961 |
*/
|
|
|
4962 |
function prohibit_is_removable($roleid, context $context, $capability) {
|
|
|
4963 |
global $DB;
|
|
|
4964 |
|
|
|
4965 |
$ctxids = trim($context->path, '/'); // kill leading slash
|
|
|
4966 |
$ctxids = str_replace('/', ',', $ctxids);
|
|
|
4967 |
|
|
|
4968 |
$params = array('roleid'=>$roleid, 'cap'=>$capability, 'prohibit'=>CAP_PROHIBIT);
|
|
|
4969 |
|
|
|
4970 |
$sql = "SELECT ctx.id
|
|
|
4971 |
FROM {role_capabilities} rc
|
|
|
4972 |
JOIN {context} ctx ON ctx.id = rc.contextid
|
|
|
4973 |
JOIN {capabilities} cap ON rc.capability = cap.name
|
|
|
4974 |
WHERE rc.roleid = :roleid AND rc.permission = :prohibit AND rc.capability = :cap AND ctx.id IN ($ctxids)
|
|
|
4975 |
ORDER BY ctx.depth DESC";
|
|
|
4976 |
|
|
|
4977 |
if (!$prohibits = $DB->get_records_sql($sql, $params)) {
|
|
|
4978 |
// no prohibits == nothing to remove
|
|
|
4979 |
return true;
|
|
|
4980 |
}
|
|
|
4981 |
|
|
|
4982 |
if (count($prohibits) > 1) {
|
|
|
4983 |
// more prohibits can not be removed
|
|
|
4984 |
return false;
|
|
|
4985 |
}
|
|
|
4986 |
|
|
|
4987 |
return !empty($prohibits[$context->id]);
|
|
|
4988 |
}
|
|
|
4989 |
|
|
|
4990 |
/**
|
|
|
4991 |
* More user friendly role permission changing,
|
|
|
4992 |
* it should produce as few overrides as possible.
|
|
|
4993 |
*
|
|
|
4994 |
* @param int $roleid
|
|
|
4995 |
* @param stdClass|context $context
|
|
|
4996 |
* @param string $capname capability name
|
|
|
4997 |
* @param int $permission
|
|
|
4998 |
* @return void
|
|
|
4999 |
*/
|
|
|
5000 |
function role_change_permission($roleid, $context, $capname, $permission) {
|
|
|
5001 |
global $DB;
|
|
|
5002 |
|
|
|
5003 |
if ($permission == CAP_INHERIT) {
|
|
|
5004 |
unassign_capability($capname, $roleid, $context->id);
|
|
|
5005 |
return;
|
|
|
5006 |
}
|
|
|
5007 |
|
|
|
5008 |
$ctxids = trim($context->path, '/'); // kill leading slash
|
|
|
5009 |
$ctxids = str_replace('/', ',', $ctxids);
|
|
|
5010 |
|
|
|
5011 |
$params = array('roleid'=>$roleid, 'cap'=>$capname);
|
|
|
5012 |
|
|
|
5013 |
$sql = "SELECT ctx.id, rc.permission, ctx.depth
|
|
|
5014 |
FROM {role_capabilities} rc
|
|
|
5015 |
JOIN {context} ctx ON ctx.id = rc.contextid
|
|
|
5016 |
JOIN {capabilities} cap ON rc.capability = cap.name
|
|
|
5017 |
WHERE rc.roleid = :roleid AND rc.capability = :cap AND ctx.id IN ($ctxids)
|
|
|
5018 |
ORDER BY ctx.depth DESC";
|
|
|
5019 |
|
|
|
5020 |
if ($existing = $DB->get_records_sql($sql, $params)) {
|
|
|
5021 |
foreach ($existing as $e) {
|
|
|
5022 |
if ($e->permission == CAP_PROHIBIT) {
|
|
|
5023 |
// prohibit can not be overridden, no point in changing anything
|
|
|
5024 |
return;
|
|
|
5025 |
}
|
|
|
5026 |
}
|
|
|
5027 |
$lowest = array_shift($existing);
|
|
|
5028 |
if ($lowest->permission == $permission) {
|
|
|
5029 |
// permission already set in this context or parent - nothing to do
|
|
|
5030 |
return;
|
|
|
5031 |
}
|
|
|
5032 |
if ($existing) {
|
|
|
5033 |
$parent = array_shift($existing);
|
|
|
5034 |
if ($parent->permission == $permission) {
|
|
|
5035 |
// permission already set in parent context or parent - just unset in this context
|
|
|
5036 |
// we do this because we want as few overrides as possible for performance reasons
|
|
|
5037 |
unassign_capability($capname, $roleid, $context->id);
|
|
|
5038 |
return;
|
|
|
5039 |
}
|
|
|
5040 |
}
|
|
|
5041 |
|
|
|
5042 |
} else {
|
|
|
5043 |
if ($permission == CAP_PREVENT) {
|
|
|
5044 |
// nothing means role does not have permission
|
|
|
5045 |
return;
|
|
|
5046 |
}
|
|
|
5047 |
}
|
|
|
5048 |
|
|
|
5049 |
// assign the needed capability
|
|
|
5050 |
assign_capability($capname, $permission, $roleid, $context->id, true);
|
|
|
5051 |
}
|
|
|
5052 |
|
|
|
5053 |
/* ============== DEPRECATED FUNCTIONS ========================================== */
|
|
|
5054 |
// Old context related functions were deprecated in 2.0, it is recommended
|
|
|
5055 |
// to use context classes in new code. Old function can be used when
|
|
|
5056 |
// creating patches that are supposed to be backported to older stable branches.
|
|
|
5057 |
// These deprecated functions will not be removed in near future,
|
|
|
5058 |
// before removing devs will be warned with a debugging message first,
|
|
|
5059 |
// then we will add error message and only after that we can remove the functions
|
|
|
5060 |
// completely.
|
|
|
5061 |
|
|
|
5062 |
// Renamed context class do not use lib/db/renamedclasses.php because we cannot
|
|
|
5063 |
// ask everybody to update all code, so let's keep this here for the next few decades.
|
|
|
5064 |
// Another benefit is that PHPStorm understands this and stops complaining.
|
|
|
5065 |
class_alias(core\context_helper::class, 'context_helper', true);
|
|
|
5066 |
class_alias(core\context::class, 'context', true);
|
|
|
5067 |
class_alias(core\context\block::class, 'context_block');
|
|
|
5068 |
class_alias(core\context\course::class, 'context_course', true);
|
|
|
5069 |
class_alias(core\context\coursecat::class, 'context_coursecat');
|
|
|
5070 |
class_alias(core\context\module::class, 'context_module', true);
|
|
|
5071 |
class_alias(core\context\system::class, 'context_system', true);
|
|
|
5072 |
class_alias(core\context\user::class, 'context_user', true);
|
|
|
5073 |
|
|
|
5074 |
/**
|
|
|
5075 |
* Runs get_records select on context table and returns the result
|
|
|
5076 |
* Does get_records_select on the context table, and returns the results ordered
|
|
|
5077 |
* by contextlevel, and then the natural sort order within each level.
|
|
|
5078 |
* for the purpose of $select, you need to know that the context table has been
|
|
|
5079 |
* aliased to ctx, so for example, you can call get_sorted_contexts('ctx.depth = 3');
|
|
|
5080 |
*
|
|
|
5081 |
* @param string $select the contents of the WHERE clause. Remember to do ctx.fieldname.
|
|
|
5082 |
* @param array $params any parameters required by $select.
|
|
|
5083 |
* @return array the requested context records.
|
|
|
5084 |
*/
|
|
|
5085 |
function get_sorted_contexts($select, $params = array()) {
|
|
|
5086 |
|
|
|
5087 |
//TODO: we should probably rewrite all the code that is using this thing, the trouble is we MUST NOT modify the context instances...
|
|
|
5088 |
|
|
|
5089 |
global $DB;
|
|
|
5090 |
if ($select) {
|
|
|
5091 |
$select = 'WHERE ' . $select;
|
|
|
5092 |
}
|
|
|
5093 |
return $DB->get_records_sql("
|
|
|
5094 |
SELECT ctx.*
|
|
|
5095 |
FROM {context} ctx
|
|
|
5096 |
LEFT JOIN {user} u ON ctx.contextlevel = " . CONTEXT_USER . " AND u.id = ctx.instanceid
|
|
|
5097 |
LEFT JOIN {course_categories} cat ON ctx.contextlevel = " . CONTEXT_COURSECAT . " AND cat.id = ctx.instanceid
|
|
|
5098 |
LEFT JOIN {course} c ON ctx.contextlevel = " . CONTEXT_COURSE . " AND c.id = ctx.instanceid
|
|
|
5099 |
LEFT JOIN {course_modules} cm ON ctx.contextlevel = " . CONTEXT_MODULE . " AND cm.id = ctx.instanceid
|
|
|
5100 |
LEFT JOIN {block_instances} bi ON ctx.contextlevel = " . CONTEXT_BLOCK . " AND bi.id = ctx.instanceid
|
|
|
5101 |
$select
|
|
|
5102 |
ORDER BY ctx.contextlevel, bi.defaultregion, COALESCE(cat.sortorder, c.sortorder, cm.section, bi.defaultweight), u.lastname, u.firstname, cm.id
|
|
|
5103 |
", $params);
|
|
|
5104 |
}
|
|
|
5105 |
|
|
|
5106 |
/**
|
|
|
5107 |
* Given context and array of users, returns array of users whose enrolment status is suspended,
|
|
|
5108 |
* or enrolment has expired or has not started. Also removes those users from the given array
|
|
|
5109 |
*
|
|
|
5110 |
* @param context $context context in which suspended users should be extracted.
|
|
|
5111 |
* @param array $users list of users.
|
|
|
5112 |
* @param array $ignoreusers array of user ids to ignore, e.g. guest
|
|
|
5113 |
* @return array list of suspended users.
|
|
|
5114 |
*/
|
|
|
5115 |
function extract_suspended_users($context, &$users, $ignoreusers=array()) {
|
|
|
5116 |
global $DB;
|
|
|
5117 |
|
|
|
5118 |
// Get active enrolled users.
|
|
|
5119 |
list($sql, $params) = get_enrolled_sql($context, null, null, true);
|
|
|
5120 |
$activeusers = $DB->get_records_sql($sql, $params);
|
|
|
5121 |
|
|
|
5122 |
// Move suspended users to a separate array & remove from the initial one.
|
|
|
5123 |
$susers = array();
|
|
|
5124 |
if (sizeof($activeusers)) {
|
|
|
5125 |
foreach ($users as $userid => $user) {
|
|
|
5126 |
if (!array_key_exists($userid, $activeusers) && !in_array($userid, $ignoreusers)) {
|
|
|
5127 |
$susers[$userid] = $user;
|
|
|
5128 |
unset($users[$userid]);
|
|
|
5129 |
}
|
|
|
5130 |
}
|
|
|
5131 |
}
|
|
|
5132 |
return $susers;
|
|
|
5133 |
}
|
|
|
5134 |
|
|
|
5135 |
/**
|
|
|
5136 |
* Given context and array of users, returns array of user ids whose enrolment status is suspended,
|
|
|
5137 |
* or enrolment has expired or not started.
|
|
|
5138 |
*
|
|
|
5139 |
* @param context $context context in which user enrolment is checked.
|
|
|
5140 |
* @param bool $usecache Enable or disable (default) the request cache
|
|
|
5141 |
* @return array list of suspended user id's.
|
|
|
5142 |
*/
|
|
|
5143 |
function get_suspended_userids(context $context, $usecache = false) {
|
|
|
5144 |
global $DB;
|
|
|
5145 |
|
|
|
5146 |
if ($usecache) {
|
|
|
5147 |
$cache = cache::make('core', 'suspended_userids');
|
|
|
5148 |
$susers = $cache->get($context->id);
|
|
|
5149 |
if ($susers !== false) {
|
|
|
5150 |
return $susers;
|
|
|
5151 |
}
|
|
|
5152 |
}
|
|
|
5153 |
|
|
|
5154 |
$coursecontext = $context->get_course_context();
|
|
|
5155 |
$susers = array();
|
|
|
5156 |
|
|
|
5157 |
// Front page users are always enrolled, so suspended list is empty.
|
|
|
5158 |
if ($coursecontext->instanceid != SITEID) {
|
|
|
5159 |
list($sql, $params) = get_enrolled_sql($context, null, null, false, true);
|
|
|
5160 |
$susers = $DB->get_fieldset_sql($sql, $params);
|
|
|
5161 |
$susers = array_combine($susers, $susers);
|
|
|
5162 |
}
|
|
|
5163 |
|
|
|
5164 |
// Cache results for the remainder of this request.
|
|
|
5165 |
if ($usecache) {
|
|
|
5166 |
$cache->set($context->id, $susers);
|
|
|
5167 |
}
|
|
|
5168 |
|
|
|
5169 |
return $susers;
|
|
|
5170 |
}
|
|
|
5171 |
|
|
|
5172 |
/**
|
|
|
5173 |
* Gets sql for finding users with capability in the given context
|
|
|
5174 |
*
|
|
|
5175 |
* @param context $context
|
|
|
5176 |
* @param string|array $capability Capability name or array of names.
|
|
|
5177 |
* If an array is provided then this is the equivalent of a logical 'OR',
|
|
|
5178 |
* i.e. the user needs to have one of these capabilities.
|
|
|
5179 |
* @return array($sql, $params)
|
|
|
5180 |
*/
|
|
|
5181 |
function get_with_capability_sql(context $context, $capability) {
|
|
|
5182 |
static $i = 0;
|
|
|
5183 |
$i++;
|
|
|
5184 |
$prefix = 'cu' . $i . '_';
|
|
|
5185 |
|
|
|
5186 |
$capjoin = get_with_capability_join($context, $capability, $prefix . 'u.id');
|
|
|
5187 |
|
|
|
5188 |
$sql = "SELECT DISTINCT {$prefix}u.id
|
|
|
5189 |
FROM {user} {$prefix}u
|
|
|
5190 |
$capjoin->joins
|
|
|
5191 |
WHERE {$prefix}u.deleted = 0 AND $capjoin->wheres";
|
|
|
5192 |
|
|
|
5193 |
return array($sql, $capjoin->params);
|
|
|
5194 |
}
|