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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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namespace core_cohort\customfield;
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use core_customfield\handler;
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use core_customfield\field_controller;
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/**
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* Cohort handler for custom fields.
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*
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* @package core_cohort
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* @copyright 2023 Dmitrii Metelkin <dmitriim@catalyst-au.net>
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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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class cohort_handler extends handler {
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/**
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* @var cohort_handler
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*/
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static protected $singleton;
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/**
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* Returns a singleton.
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*
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* @param int $itemid
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* @return \core_customfield\handler
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*/
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public static function create(int $itemid = 0): handler {
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if (static::$singleton === null) {
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self::$singleton = new static(0);
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}
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return self::$singleton;
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}
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/**
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* Run reset code after unit tests to reset the singleton usage.
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*/
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public static function reset_caches(): void {
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if (!PHPUNIT_TEST) {
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throw new \coding_exception('This feature is only intended for use in unit tests');
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}
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static::$singleton = null;
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}
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/**
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* The current user can configure custom fields on this component.
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*
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* @return bool true if the current can configure custom fields, false otherwise
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*/
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public function can_configure(): bool {
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return has_capability('moodle/cohort:configurecustomfields', $this->get_configuration_context());
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}
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/**
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* The current user can edit custom fields on the given cohort.
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*
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* @param field_controller $field
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* @param int $instanceid id of the cohort to test edit permission
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* @return bool true if the current can edit custom field, false otherwise
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*/
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public function can_edit(field_controller $field, int $instanceid = 0): bool {
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return has_capability('moodle/cohort:manage', $this->get_instance_context($instanceid));
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}
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/**
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* The current user can view custom fields on the given cohort.
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*
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* @param field_controller $field
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* @param int $instanceid id of the cohort to test edit permission
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* @return bool true if the current can view custom field, false otherwise
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*/
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public function can_view(field_controller $field, int $instanceid): bool {
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return has_any_capability(['moodle/cohort:manage', 'moodle/cohort:view'], $this->get_instance_context($instanceid));
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}
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/**
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* Context that should be used for new categories created by this handler.
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*
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* @return \context the context for configuration
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*/
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public function get_configuration_context(): \context {
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return \context_system::instance();
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}
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/**
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* URL for configuration of the fields on this handler.
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*
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* @return \moodle_url The URL to configure custom fields for this component
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*/
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public function get_configuration_url(): \moodle_url {
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return new \moodle_url('/cohort/customfield.php');
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}
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/**
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* Returns the context for the data associated with the given instanceid.
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*
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* @param int $instanceid id of the record to get the context for
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* @return \context the context for the given record
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*/
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public function get_instance_context(int $instanceid = 0): \context {
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global $DB;
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if ($instanceid > 0) {
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$cohort = $DB->get_record('cohort', ['id' => $instanceid], '*', MUST_EXIST);
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return \context::instance_by_id($cohort->contextid, MUST_EXIST);
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} else {
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return \context_system::instance();
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}
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}
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}
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