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tracking.php
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tracking.php
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<?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/>.
/**
* Set tracking option for the moodleoverflow.
*
* @package mod_moodleoverflow
* @copyright 2017 Kennet Winter <k_wint10@uni-muenster.de>
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
// Require needed files.
require_once("../../config.php");
require_once("locallib.php");
// Get submitted parameters.
$id = required_param('id', PARAM_INT); // The moodleoverflow to track or untrack.
$returnpage = optional_param('returnpage', 'index.php', PARAM_FILE); // The page to return to.
// A session key is needed to change the tracking options.
require_sesskey();
// Retrieve the moodleoverflow instance to track or untrack.
if (!$moodleoverflow = $DB->get_record("moodleoverflow", ["id" => $id])) {
throw new moodle_exception('invalidmoodleoverflowid', 'moodleoverflow');
}
// Retrieve the course of the instance.
if (!$course = $DB->get_record("course", ["id" => $moodleoverflow->course])) {
throw new moodle_exception('invalidcoursemodule');
}
// Retrieve the course module of that course.
if (!$cm = get_coursemodule_from_instance("moodleoverflow", $moodleoverflow->id, $course->id)) {
throw new moodle_exception('invalidcoursemodule');
}
// From now on the user needs to be logged in and enrolled.
require_login($course, false, $cm);
// Set the page to return to.
$url = '/mod/moodleoverflow/' . $returnpage;
$params = ['id' => $course->id, 'm' => $moodleoverflow->id];
$returnpageurl = new moodle_url($url, $params);
$returnto = moodleoverflow_go_back_to($returnpageurl);
// Check whether the user can track the moodleoverflow instance.
$cantrack = \mod_moodleoverflow\readtracking::moodleoverflow_can_track_moodleoverflows($moodleoverflow);
// Do not continue if the user is not allowed to track the moodleoverflow. Redirect the user back.
if (!$cantrack) {
redirect($returnto);
exit;
}
// Create an info object.
$info = new stdClass();
$info->name = fullname($USER);
$info->moodleoverflow = format_string($moodleoverflow->name);
// Set parameters for an event.
$eventparams = [
'context' => context_module::instance($cm->id),
'relateduserid' => $USER->id,
'other' => ['moodleoverflowid' => $moodleoverflow->id],
];
// Check whether the moodleoverflow is tracked.
$istracked = \mod_moodleoverflow\readtracking::moodleoverflow_is_tracked($moodleoverflow);
if ($istracked) {
// The moodleoverflow instance is tracked. The next step is to untrack.
// Untrack the moodleoverflow instance.
if (\mod_moodleoverflow\readtracking::moodleoverflow_stop_tracking($moodleoverflow->id)) {
// Successful stopped to track.
// Trigger the readtracking disabled event.
$event = \mod_moodleoverflow\event\readtracking_disabled::create($eventparams);
$event->trigger();
// Redirect the user back to where he is coming from.
redirect($returnpageurl, get_string('nownottracking', 'moodleoverflow', $info), 1);
} else {
// The insertion failed.
// Print an error message.
throw new moodle_exception('cannottrack', 'moodleoverflow', get_local_referer(false));
}
} else {
// The moodleoverflow instance is not tracked. The next step is to track.
// Track the moodleoverflow instance.
if (\mod_moodleoverflow\readtracking::moodleoverflow_start_tracking($moodleoverflow->id)) {
// Successfully started to track.
// Trigger the readtracking event.
$event = \mod_moodleoverflow\event\readtracking_enabled::create($eventparams);
$event->trigger();
// Redirect the user back to where he is coming from.
redirect($returnto, get_string('nowtracking', 'moodleoverflow', $info), 1);
} else {
// The deletion failed.
// Print an error message.
throw new moodle_exception('cannottrack', 'moodleoverflow', get_local_referer(false));
}
}