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/>.

/**

 * Event observers used in forum.

 *

 * @package    mod_forum

 * @copyright  2013 Rajesh Taneja <rajesh@moodle.com>

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

 */

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

/**

 * Event observer for mod_forum.

 */

class mod_forum_observer {

    /**

     * Triggered via user_enrolment_deleted event.

     *

     * @param \core\event\user_enrolment_deleted $event

     */

    public static function user_enrolment_deleted(\core\event\user_enrolment_deleted $event) {

        global $DB;

        // NOTE: this has to be as fast as possible.

        // Get user enrolment info from event.

        $cp = (object)$event->other['userenrolment'];

        if ($cp->lastenrol) {

            if (!$forums = $DB->get_records('forum', array('course' => $cp->courseid), '', 'id')) {

                return;

            }

            list($forumselect, $params) = $DB->get_in_or_equal(array_keys($forums), SQL_PARAMS_NAMED);

            $params['userid'] = $cp->userid;

            $DB->delete_records_select('forum_digests', 'userid = :userid AND forum '.$forumselect, $params);

            $DB->delete_records_select('forum_subscriptions', 'userid = :userid AND forum '.$forumselect, $params);

            $DB->delete_records_select('forum_track_prefs', 'userid = :userid AND forumid '.$forumselect, $params);

            $DB->delete_records_select('forum_read', 'userid = :userid AND forumid '.$forumselect, $params);

        }

    }

    /**

     * Observer for role_assigned event.

     *

     * @param \core\event\role_assigned $event

     * @return void

     */

    public static function role_assigned(\core\event\role_assigned $event) {

        global $CFG, $DB;

        $context = context::instance_by_id($event->contextid, MUST_EXIST);

        // If contextlevel is course then only subscribe user. Role assignment

        // at course level means user is enroled in course and can subscribe to forum.

        if ($context->contextlevel != CONTEXT_COURSE) {

            return;

        }

        // Forum lib required for the constant used below.

        require_once($CFG->dirroot . '/mod/forum/lib.php');

        $userid = $event->relateduserid;

        $sql = "SELECT f.id, f.course as course, cm.id AS cmid, f.forcesubscribe

                  FROM {forum} f

                  JOIN {course_modules} cm ON (cm.instance = f.id)

                  JOIN {modules} m ON (m.id = cm.module)

             LEFT JOIN {forum_subscriptions} fs ON (fs.forum = f.id AND fs.userid = :userid)

                 WHERE f.course = :courseid

                   AND f.forcesubscribe = :initial

                   AND m.name = 'forum'

                   AND fs.id IS NULL";

        $params = array('courseid' => $context->instanceid, 'userid' => $userid, 'initial' => FORUM_INITIALSUBSCRIBE);

        $forums = $DB->get_records_sql($sql, $params);

        foreach ($forums as $forum) {

            // If user doesn't have allowforcesubscribe capability then don't subscribe.

            $modcontext = context_module::instance($forum->cmid);

            if (has_capability('mod/forum:allowforcesubscribe', $modcontext, $userid)) {

                \mod_forum\subscriptions::subscribe_user($userid, $forum, $modcontext);

            }

        }

    }

    /**

     * Observer for \core\event\course_module_created event.

     *

     * @param \core\event\course_module_created $event

     * @return void

     */

    public static function course_module_created(\core\event\course_module_created $event) {

        global $CFG;

        if ($event->other['modulename'] === 'forum') {

            // Include the forum library to make use of the forum_instance_created function.

            require_once($CFG->dirroot . '/mod/forum/lib.php');

            $forum = $event->get_record_snapshot('forum', $event->other['instanceid']);

            forum_instance_created($event->get_context(), $forum);

        }

    }

    /**

     * Observer for \core\event\course_created event.

     *

     * @param \core\event\course_created $event

     * @return void

     */

    public static function course_created(\core\event\course_created $event) {

        global $CFG;

        $course = $event->get_record_snapshot('course', $event->objectid);

        $format = course_get_format($course);

        $courseformat = $format->get_format();

        $forumformat = '';

        if ($format->supports_news() && !empty($course->newsitems)) {

            $forumformat = 'news';

        } else if ($courseformat === 'social') {

            $forumformat = 'social';

        }

        if ($forumformat) {

            require_once($CFG->dirroot . '/mod/forum/lib.php');

            // Auto-create the course forum if necessary.

            forum_get_course_forum($event->objectid, $forumformat);

        }

    }

    /**

     * Observer for \core\event\course_updated event.

     *

     * @param \core\event\course_updated $event

     * @return void

     */

    public static function course_updated(\core\event\course_updated $event) {

        global $CFG;

        $course = $event->get_record_snapshot('course', $event->objectid);

        $format = course_get_format($course);

        $courseformat = $format->get_format();

        $forumformat = '';

        if ($format->supports_news() && !empty($course->newsitems)) {

            $forumformat = 'news';

        } else if ($courseformat === 'social') {

            $forumformat = 'social';

        }

        if ($forumformat) {

            require_once($CFG->dirroot . '/mod/forum/lib.php');

            // Auto-create the course forum if necessary.

            forum_get_course_forum($event->objectid, $forumformat);

        }

    }

}