<?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/>.

/**
 * This file contains the moodle hooks for the submission comments plugin
 *
 * @package   assignsubmission_comments
 * @copyright 2012 NetSpot {@link http://www.netspot.com.au}
 * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 */
defined('MOODLE_INTERNAL') || die();

/**
 *
 * Callback method for data validation---- required method for AJAXmoodle based comment API
 *
 * @param stdClass $options
 * @return bool
 */
function assignsubmission_comments_comment_validate(stdClass $options) {

    return true;
}

/**
 * Permission control method for submission plugin ---- required method for AJAXmoodle based comment API
 *
 * @param stdClass $options
 * @return array
 */
function assignsubmission_comments_comment_permissions(stdClass $options) {

    return array('post' => true, 'view' => true);
}

/**
 * Callback to force the userid for all comments to be the userid of the submission and NOT the global $USER->id. This
 * is required by the upgrade code. Note the comment area is used to identify upgrades.
 *
 * @param stdClass $comment
 * @param stdClass $param
 */
function assignsubmission_comments_comment_add(stdClass $comment, stdClass $param) {

    global $DB;
    if ($comment->commentarea == 'submission_comments_upgrade') {
        $submissionid = $comment->itemid;
        $submission = $DB->get_record('assign_submission', array('id' => $submissionid));

        $comment->userid = $submission->userid;
        $comment->commentarea = 'submission_comments';
    }
}