Proyectos de Subversion Moodle

<?php

// This file is part of Moodle - http://moodle.org/

//

// Moodle is free software: you can redistribute it and/or modify

// it under the terms of the GNU General Public License as published by

// the Free Software Foundation, either version 3 of the License, or

// (at your option) any later version.

//

// Moodle is distributed in the hope that it will be useful,

// but WITHOUT ANY WARRANTY; without even the implied warranty of

// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

// GNU General Public License for more details.

//

// You should have received a copy of the GNU General Public License

// along with Moodle.  If not, see <http://www.gnu.org/licenses/>.

/**

 * Settings form for overrides in the assign module.

 *

 * @package    mod_assign

 * @copyright  2016 Ilya Tregubov

 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later

 */

defined('MOODLE_INTERNAL') || die();

require_once($CFG->libdir . '/formslib.php');

require_once($CFG->dirroot . '/mod/assign/mod_form.php');

/**

 * Form for editing settings overrides.

 *

 * @copyright  2016 Ilya Tregubov

 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later

 */

class assign_override_form extends moodleform {

    /** @var object course module object. */

    protected $cm;

    /** @var object the assign settings object. */

    protected $assign;

    /** @var context the assign context. */

    protected $context;

    /** @var bool editing group override (true) or user override (false). */

    protected $groupmode;

    /** @var int groupid, if provided. */

    protected $groupid;

    /** @var int userid, if provided. */

    protected $userid;

    /** @var int sortorder, if provided. */

    protected $sortorder;

    /** @var int selecteduserid, if provided. */

    protected $selecteduserid;

    /**

     * Constructor.

     * @param moodle_url $submiturl the form action URL.

     * @param object $cm course module object.

     * @param object $assign the assign settings object.

     * @param object $context the assign context.

     * @param bool $groupmode editing group override (true) or user override (false).

     * @param object $override the override being edited, if it already exists.

     * @param int $selecteduserid the user selected in the form, if any.

     */

    public function __construct($submiturl, $cm, $assign, $context, $groupmode, $override, $selecteduserid = null) {

        $this->cm = $cm;

        $this->assign = $assign;

        $this->context = $context;

        $this->groupmode = $groupmode;

        $this->groupid = empty($override->groupid) ? 0 : $override->groupid;

        $this->userid = empty($override->userid) ? 0 : $override->userid;

        $this->sortorder = empty($override->sortorder) ? null : $override->sortorder;

        $this->selecteduserid = $selecteduserid;

        parent::__construct($submiturl, null, 'post');

    }

    /**

     * Define this form - called by the parent constructor

     */

    protected function definition() {

        global $DB, $OUTPUT, $PAGE;

        $cm = $this->cm;

        $mform = $this->_form;

        $userid = $this->selecteduserid ?? $this->userid ?: null;

        $assigninstance = $this->assign->get_instance($userid);

        $inrelativedatesmode = !empty($this->assign->get_course()->relativedatesmode);

        $assigngroupmode = groups_get_activity_groupmode($cm);

        $accessallgroups = ($assigngroupmode == NOGROUPS) || has_capability('moodle/site:accessallgroups', $this->context);

        if ($this->groupmode) {

            $mform->addElement('header', 'override', get_string('groupoverrides', 'assign'));

            // Group override.

            if ($this->groupid) {

                // There is already a groupid, so freeze the selector.

                $groupchoices = [

                    $this->groupid => format_string(groups_get_group_name($this->groupid), true, ['context' => $this->context]),

                ];

                $mform->addElement('select', 'groupid',

                        get_string('overridegroup', 'assign'), $groupchoices);

                $mform->freeze('groupid');

                // Add a sortorder element.

                $mform->addElement('hidden', 'sortorder', $this->sortorder);

                $mform->setType('sortorder', PARAM_INT);

                $mform->freeze('sortorder');

            } else {

                // Prepare the list of groups.

                // Only include the groups the current can access.

                $groups = $accessallgroups ? groups_get_all_groups($cm->course) : groups_get_activity_allowed_groups($cm);

                if (empty($groups)) {

                    // Generate an error.

                    $link = new moodle_url('/mod/assign/overrides.php', array('cmid' => $cm->id));

                    throw new \moodle_exception('groupsnone', 'assign', $link);

                }

                $groupchoices = array();

                foreach ($groups as $group) {

                    if ($group->visibility != GROUPS_VISIBILITY_NONE) {

                        $groupchoices[$group->id] = format_string($group->name, true, ['context' => $this->context]);

                    }

                }

                unset($groups);

                if (count($groupchoices) == 0) {

                    $groupchoices[0] = get_string('none');

                }

                $mform->addElement('select', 'groupid',

                        get_string('overridegroup', 'assign'), $groupchoices);

                $mform->addRule('groupid', get_string('required'), 'required', null, 'client');

            }

        } else {

            $mform->addElement('header', 'override', get_string('useroverrides', 'assign'));

            // User override.

            if ($this->userid) {

                // There is already a userid, so freeze the selector.

                $user = $DB->get_record('user', array('id' => $this->userid));

                $userchoices = array();

                $userchoices[$this->userid] = fullname($user);

                $mform->addElement('select', 'userid',

                        get_string('overrideuser', 'assign'), $userchoices);

                $mform->freeze('userid');

            } else {

                // Prepare the list of users.

                $users = [];

                list($sort) = users_order_by_sql('u');

                // Get the list of appropriate users, depending on whether and how groups are used.

                $userfieldsapi = \core_user\fields::for_name();

                $userfields = 'u.id, u.email, ' . $userfieldsapi->get_sql('u', false, '', '', false)->selects;

                $groupids = 0;

                if (!$accessallgroups) {

                    $groups = groups_get_activity_allowed_groups($cm);

                    $groupids = array_keys($groups);

                }

                $users = get_enrolled_users($this->context, '',

                        $groupids, $userfields, $sort);

                // Filter users based on any fixed restrictions (groups, profile).

                $info = new \core_availability\info_module($cm);

                $users = $info->filter_user_list($users);

                if (empty($users)) {

                    // Generate an error.

                    $link = new moodle_url('/mod/assign/overrides.php', array('cmid' => $cm->id));

                    throw new \moodle_exception('usersnone', 'assign', $link);

                }

                $userchoices = array();

                // TODO Does not support custom user profile fields (MDL-70456).

                $canviewemail = in_array('email', \core_user\fields::get_identity_fields($this->context, false));

                foreach ($users as $id => $user) {

                    if (empty($invalidusers[$id]) || (!empty($override) &&

                            $id == $override->userid)) {

                        if ($canviewemail) {

                            $userchoices[$id] = fullname($user) . ', ' . $user->email;

                        } else {

                            $userchoices[$id] = fullname($user);

                        }

                    }

                }

                unset($users);

                if (count($userchoices) == 0) {

                    $userchoices[0] = get_string('none');

                }

                $mform->addElement('searchableselector', 'userid',

                        get_string('overrideuser', 'assign'), $userchoices);

                $mform->addRule('userid', get_string('required'), 'required', null, 'client');

                if ($inrelativedatesmode) {

                    // If in relative dates mode then add the JS to reload the page when the user

                    // selection is changed to ensure that the correct dates are displayed.

                    $PAGE->requires->js_call_amd('mod_assign/override_form', 'init', [

                        $mform->getAttribute('id'),

                        'userid'

                    ]);

                }

            }

            if ($inrelativedatesmode) {

                if ($userid) {

                    $templatecontext = [

                        'allowsubmissionsfromdate' => $assigninstance->allowsubmissionsfromdate,

                        'duedate' => $assigninstance->duedate,

                        'cutoffdate' => $assigninstance->cutoffdate

                    ];

                    $html = $OUTPUT->render_from_template('mod_assign/override_form_user_defaults', $templatecontext);

                } else {

                    $html = get_string('noselection', 'form');

                }

                $groupelements = [];

                $groupelements[] = $mform->createElement('html', $html);

                $mform->addGroup($groupelements, null, get_string('userassignmentdefaults', 'mod_assign'), null, false);

            }

        }

        $users = $DB->get_fieldset_select('groups_members', 'userid', 'groupid = ?', array($this->groupid));

        array_push($users, $this->userid);

        $extensionmax = 0;

        foreach ($users as $value) {

            $extension = $DB->get_record('assign_user_flags', array('assignment' => $assigninstance->id,

                'userid' => $value));

            if ($extension) {

                if ($extensionmax < $extension->extensionduedate) {

                    $extensionmax = $extension->extensionduedate;

                }

            }

        }

        if ($extensionmax) {

            $assigninstance->extensionduedate = $extensionmax;

        }

        // Open and close dates.

        $mform->addElement('date_time_selector', 'allowsubmissionsfromdate',

            get_string('allowsubmissionsfromdate', 'assign'), array('optional' => true));

        $mform->setDefault('allowsubmissionsfromdate', $assigninstance->allowsubmissionsfromdate);

        $mform->addElement('date_time_selector', 'duedate', get_string('duedate', 'assign'), array('optional' => true));

        $mform->setDefault('duedate', $assigninstance->duedate);

        $mform->addElement('date_time_selector', 'cutoffdate', get_string('cutoffdate', 'assign'), array('optional' => true));

        $mform->setDefault('cutoffdate', $assigninstance->cutoffdate);

        if (isset($assigninstance->extensionduedate)) {

            $mform->addElement('static', 'extensionduedate', get_string('extensionduedate', 'assign'),

                userdate($assigninstance->extensionduedate));

        }

        // Time limit.

        $timelimitenabled = get_config('assign', 'enabletimelimit');

        if ($timelimitenabled) {

            $mform->addElement('duration', 'timelimit',

                get_string('timelimit', 'assign'), array('optional' => true));

            $mform->setDefault('timelimit', $assigninstance->timelimit);

        }

        // Submit buttons.

        $mform->addElement('submit', 'resetbutton',

                get_string('reverttodefaults', 'assign'));

        $buttonarray = array();

        $buttonarray[] = $mform->createElement('submit', 'submitbutton',

                get_string('save', 'assign'));

        $buttonarray[] = $mform->createElement('submit', 'againbutton',

                get_string('saveoverrideandstay', 'assign'));

        $buttonarray[] = $mform->createElement('cancel');

        $mform->addGroup($buttonarray, 'buttonbar', '', array(' '), false);

        $mform->closeHeaderBefore('buttonbar');

    }

    /**

     * Validate the submitted form data.

     *

     * @param array $data array of ("fieldname"=>value) of submitted data

     * @param array $files array of uploaded files "element_name"=>tmp_file_path

     * @return array of "element_name"=>"error_description" if there are errors

     */

    public function validation($data, $files) {

        $errors = parent::validation($data, $files);

        $mform =& $this->_form;

        $userid = $this->selecteduserid ?? $this->userid ?: null;

        $assigninstance = $this->assign->get_instance($userid);

        if ($mform->elementExists('userid')) {

            if (empty($data['userid'])) {

                $errors['userid'] = get_string('required');

            }

        }

        if ($mform->elementExists('groupid')) {

            if (empty($data['groupid'])) {

                $errors['groupid'] = get_string('required');

            }

        }

        // Ensure that the dates make sense.

        if (!empty($data['allowsubmissionsfromdate']) && !empty($data['cutoffdate'])) {

            if ($data['cutoffdate'] < $data['allowsubmissionsfromdate']) {

                $errors['cutoffdate'] = get_string('cutoffdatefromdatevalidation', 'assign');

            }

        }

        if (!empty($data['allowsubmissionsfromdate']) && !empty($data['duedate'])) {

            if ($data['duedate'] <= $data['allowsubmissionsfromdate']) {

                $errors['duedate'] = get_string('duedateaftersubmissionvalidation', 'assign');

            }

        }

        if (!empty($data['cutoffdate']) && !empty($data['duedate'])) {

            if ($data['cutoffdate'] < $data['duedate'] ) {

                $errors['cutoffdate'] = get_string('cutoffdatevalidation', 'assign');

            }

        }

        // Ensure that override duedate/allowsubmissionsfromdate are before extension date if exist.

        if (!empty($assigninstance->extensionduedate) && !empty($data['duedate'])) {

            if ($assigninstance->extensionduedate < $data['duedate']) {

                $errors['duedate'] = get_string('extensionnotafterduedate', 'assign');

            }

        }

        if (!empty($assigninstance->extensionduedate) && !empty($data['allowsubmissionsfromdate'])) {

            if ($assigninstance->extensionduedate < $data['allowsubmissionsfromdate']) {

                $errors['allowsubmissionsfromdate'] = get_string('extensionnotafterfromdate', 'assign');

            }

        }

        // Ensure that at least one assign setting was changed.

        $changed = false;

        $keys = array('duedate', 'cutoffdate', 'allowsubmissionsfromdate', 'timelimit');

        foreach ($keys as $key) {

            if (isset($data[$key]) && $data[$key] != $assigninstance->{$key}) {

                $changed = true;

                break;

            }

        }

        if (!$changed) {

            $errors['allowsubmissionsfromdate'] = get_string('nooverridedata', 'assign');

        }

        return $errors;

    }

}