2 // This file is part of Moodle - http://moodle.org/
4 // Moodle is free software: you can redistribute it and/or modify
5 // it under the terms of the GNU General Public License as published by
6 // the Free Software Foundation, either version 3 of the License, or
7 // (at your option) any later version.
9 // Moodle is distributed in the hope that it will be useful,
10 // but WITHOUT ANY WARRANTY; without even the implied warranty of
11 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 // GNU General Public License for more details.
14 // You should have received a copy of the GNU General Public License
15 // along with Moodle. If not, see <http://www.gnu.org/licenses/>.
18 * Contains classes, functions and constants used in badges.
22 * @copyright 2012 onwards Totara Learning Solutions Ltd {@link http://www.totaralms.com/}
23 * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
24 * @author Yuliya Bozhko <yuliya.bozhko@totaralms.com>
27 defined('MOODLE_INTERNAL') || die();
29 /* Include required award criteria library. */
30 require_once($CFG->dirroot . '/badges/criteria/award_criteria.php');
33 * Number of records per page.
35 define('BADGE_PERPAGE', 50);
38 * Badge award criteria aggregation method.
40 define('BADGE_CRITERIA_AGGREGATION_ALL', 1);
43 * Badge award criteria aggregation method.
45 define('BADGE_CRITERIA_AGGREGATION_ANY', 2);
48 * Inactive badge means that this badge cannot be earned and has not been awarded
49 * yet. Its award criteria can be changed.
51 define('BADGE_STATUS_INACTIVE', 0);
54 * Active badge means that this badge can we earned, but it has not been awarded
55 * yet. Can be deactivated for the purpose of changing its criteria.
57 define('BADGE_STATUS_ACTIVE', 1);
60 * Inactive badge can no longer be earned, but it has been awarded in the past and
61 * therefore its criteria cannot be changed.
63 define('BADGE_STATUS_INACTIVE_LOCKED', 2);
66 * Active badge means that it can be earned and has already been awarded to users.
67 * Its criteria cannot be changed any more.
69 define('BADGE_STATUS_ACTIVE_LOCKED', 3);
72 * Archived badge is considered deleted and can no longer be earned and is not
73 * displayed in the list of all badges.
75 define('BADGE_STATUS_ARCHIVED', 4);
78 * Badge type for site badges.
80 define('BADGE_TYPE_SITE', 1);
83 * Badge type for course badges.
85 define('BADGE_TYPE_COURSE', 2);
88 * Badge messaging schedule options.
90 define('BADGE_MESSAGE_NEVER', 0);
91 define('BADGE_MESSAGE_ALWAYS', 1);
92 define('BADGE_MESSAGE_DAILY', 2);
93 define('BADGE_MESSAGE_WEEKLY', 3);
94 define('BADGE_MESSAGE_MONTHLY', 4);
97 * Class that represents badge.
101 /** @var int Badge id */
104 /** Values from the table 'badge' */
108 public $timemodified;
110 public $usermodified;
113 public $issuercontact;
115 public $expireperiod;
119 public $messagesubject;
121 public $notification;
125 /** @var array Badge criteria */
126 public $criteria = array();
129 * Constructs with badge details.
131 * @param int $badgeid badge ID.
133 public function __construct($badgeid) {
135 $this->id = $badgeid;
137 $data = $DB->get_record('badge', array('id' => $badgeid));
140 print_error('error:nosuchbadge', 'badges', $badgeid);
143 foreach ((array)$data as $field => $value) {
144 if (property_exists($this, $field)) {
145 $this->{$field} = $value;
149 $this->criteria = self::get_criteria();
153 * Use to get context instance of a badge.
154 * @return context instance.
156 public function get_context() {
157 if ($this->type == BADGE_TYPE_SITE) {
158 return context_system::instance();
159 } else if ($this->type == BADGE_TYPE_COURSE) {
160 return context_course::instance($this->courseid);
162 debugging('Something is wrong...');
167 * Return array of aggregation methods
170 public static function get_aggregation_methods() {
172 BADGE_CRITERIA_AGGREGATION_ALL => get_string('all', 'badges'),
173 BADGE_CRITERIA_AGGREGATION_ANY => get_string('any', 'badges'),
178 * Return array of accepted criteria types for this badge
181 public function get_accepted_criteria() {
182 $criteriatypes = array();
184 if ($this->type == BADGE_TYPE_COURSE) {
185 $criteriatypes = array(
186 BADGE_CRITERIA_TYPE_OVERALL,
187 BADGE_CRITERIA_TYPE_MANUAL,
188 BADGE_CRITERIA_TYPE_COURSE,
189 BADGE_CRITERIA_TYPE_ACTIVITY
191 } else if ($this->type == BADGE_TYPE_SITE) {
192 $criteriatypes = array(
193 BADGE_CRITERIA_TYPE_OVERALL,
194 BADGE_CRITERIA_TYPE_MANUAL,
195 BADGE_CRITERIA_TYPE_COURSESET,
196 BADGE_CRITERIA_TYPE_PROFILE,
200 return $criteriatypes;
204 * Save/update badge information in 'badge' table only.
205 * Cannot be used for updating awards and criteria settings.
207 * @return bool Returns true on success.
209 public function save() {
212 $fordb = new stdClass();
213 foreach (get_object_vars($this) as $k => $v) {
216 unset($fordb->criteria);
218 $fordb->timemodified = time();
219 if ($DB->update_record_raw('badge', $fordb)) {
222 throw new moodle_exception('error:save', 'badges');
228 * Creates and saves a clone of badge with all its properties.
229 * Clone is not active by default and has 'Copy of' attached to its name.
231 * @return int ID of new badge.
233 public function make_clone() {
236 $fordb = new stdClass();
237 foreach (get_object_vars($this) as $k => $v) {
241 $fordb->name = get_string('copyof', 'badges', $this->name);
242 $fordb->status = BADGE_STATUS_INACTIVE;
243 $fordb->usercreated = $USER->id;
244 $fordb->usermodified = $USER->id;
245 $fordb->timecreated = time();
246 $fordb->timemodified = time();
249 if ($fordb->notification > 1) {
250 $fordb->nextcron = badges_calculate_message_schedule($fordb->notification);
253 $criteria = $fordb->criteria;
254 unset($fordb->criteria);
256 if ($new = $DB->insert_record('badge', $fordb, true)) {
257 $newbadge = new badge($new);
260 $fs = get_file_storage();
261 if ($file = $fs->get_file($this->get_context()->id, 'badges', 'badgeimage', $this->id, '/', 'f1.png')) {
262 if ($imagefile = $file->copy_content_to_temp()) {
263 badges_process_badge_image($newbadge, $imagefile);
267 // Copy badge criteria.
268 foreach ($this->criteria as $crit) {
269 $crit->make_clone($new);
274 throw new moodle_exception('error:clone', 'badges');
280 * Checks if badges is active.
281 * Used in badge award.
283 * @return bool A status indicating badge is active
285 public function is_active() {
286 if (($this->status == BADGE_STATUS_ACTIVE) ||
287 ($this->status == BADGE_STATUS_ACTIVE_LOCKED)) {
294 * Use to get the name of badge status.
297 public function get_status_name() {
298 return get_string('badgestatus_' . $this->status, 'badges');
302 * Use to set badge status.
303 * Only active badges can be earned/awarded/issued.
305 * @param int $status Status from BADGE_STATUS constants
307 public function set_status($status = 0) {
308 $this->status = $status;
313 * Checks if badges is locked.
314 * Used in badge award and editing.
316 * @return bool A status indicating badge is locked
318 public function is_locked() {
319 if (($this->status == BADGE_STATUS_ACTIVE_LOCKED) ||
320 ($this->status == BADGE_STATUS_INACTIVE_LOCKED)) {
327 * Checks if badge has been awarded to users.
328 * Used in badge editing.
330 * @return bool A status indicating badge has been awarded at least once
332 public function has_awards() {
334 if ($DB->record_exists('badge_issued', array('badgeid' => $this->id))) {
341 * Gets list of users who have earned an instance of this badge.
343 * @return array An array of objects with information about badge awards.
345 public function get_awards() {
348 $awards = $DB->get_records_sql(
349 'SELECT b.userid, b.dateissued, b.uniquehash, u.firstname, u.lastname
350 FROM {badge_issued} b INNER JOIN {user} u
352 WHERE b.badgeid = :badgeid', array('badgeid' => $this->id));
358 * Indicates whether badge has already been issued to a user.
361 public function is_issued($userid) {
363 return $DB->record_exists('badge_issued', array('badgeid' => $this->id, 'userid' => $userid));
367 * Issue a badge to user.
369 * @param int $userid User who earned the badge
370 * @param bool $nobake Not baking actual badges (for testing purposes)
372 public function issue($userid, $nobake = false) {
376 $issued = new stdClass();
377 $issued->badgeid = $this->id;
378 $issued->userid = $userid;
379 $issued->uniquehash = sha1(rand() . $userid . $this->id . $now);
380 $issued->dateissued = $now;
382 if ($this->can_expire()) {
383 $issued->dateexpire = $this->calculate_expiry($now);
385 $issued->dateexpire = null;
388 // Take into account user badges privacy settings.
389 // If none set, badges default visibility is set to public.
390 $issued->visible = get_user_preferences('badgeprivacysetting', 1, $userid);
392 $result = $DB->insert_record('badge_issued', $issued, true);
395 // Lock the badge, so that its criteria could not be changed any more.
396 if ($this->status == BADGE_STATUS_ACTIVE) {
397 $this->set_status(BADGE_STATUS_ACTIVE_LOCKED);
400 // Update details in criteria_met table.
401 $compl = $this->get_criteria_completions($userid);
402 foreach ($compl as $c) {
403 $obj = new stdClass();
405 $obj->issuedid = $result;
406 $DB->update_record('badge_criteria_met', $obj, true);
410 // Bake a badge image.
411 $pathhash = badges_bake($issued->uniquehash, $this->id, $userid, true);
413 // Notify recipients and badge creators.
414 badges_notify_badge_award($this, $userid, $issued->uniquehash, $pathhash);
420 * Reviews all badge criteria and checks if badge can be instantly awarded.
422 * @return int Number of awards
424 public function review_all_criteria() {
428 // Raise timelimit as this could take a while for big web sites.
429 core_php_time_limit::raise();
430 raise_memory_limit(MEMORY_HUGE);
432 // For site level badges, get all active site users who can earn this badge and haven't got it yet.
433 if ($this->type == BADGE_TYPE_SITE) {
434 $sql = 'SELECT DISTINCT u.id, bi.badgeid
436 LEFT JOIN {badge_issued} bi
437 ON u.id = bi.userid AND bi.badgeid = :badgeid
438 WHERE bi.badgeid IS NULL AND u.id != :guestid AND u.deleted = 0';
439 $toearn = $DB->get_fieldset_sql($sql, array('badgeid' => $this->id, 'guestid' => $CFG->siteguest));
441 // For course level badges, get users who can earn this badge in the course.
442 // These are all enrolled users with capability moodle/badges:earnbadge.
443 $earned = $DB->get_fieldset_select('badge_issued', 'userid AS id', 'badgeid = :badgeid', array('badgeid' => $this->id));
444 $users = get_enrolled_users($this->get_context(), 'moodle/badges:earnbadge', 0, 'u.id');
445 $toearn = array_diff(array_keys($users), $earned);
448 foreach ($toearn as $uid) {
450 foreach ($this->criteria as $crit) {
451 if ($crit->criteriatype != BADGE_CRITERIA_TYPE_OVERALL) {
452 if ($crit->review($uid)) {
453 $crit->mark_complete($uid);
454 if ($this->criteria[BADGE_CRITERIA_TYPE_OVERALL]->method == BADGE_CRITERIA_AGGREGATION_ANY) {
455 $this->criteria[BADGE_CRITERIA_TYPE_OVERALL]->mark_complete($uid);
464 if ($this->criteria[BADGE_CRITERIA_TYPE_OVERALL]->method == BADGE_CRITERIA_AGGREGATION_ANY) {
472 // Review overall if it is required.
473 if ($toreview && $this->criteria[BADGE_CRITERIA_TYPE_OVERALL]->review($uid)) {
474 $this->criteria[BADGE_CRITERIA_TYPE_OVERALL]->mark_complete($uid);
484 * Gets an array of completed criteria from 'badge_criteria_met' table.
486 * @param int $userid Completions for a user
487 * @return array Records of criteria completions
489 public function get_criteria_completions($userid) {
491 $completions = array();
492 $sql = "SELECT bcm.id, bcm.critid
493 FROM {badge_criteria_met} bcm
494 INNER JOIN {badge_criteria} bc ON bcm.critid = bc.id
495 WHERE bc.badgeid = :badgeid AND bcm.userid = :userid ";
496 $completions = $DB->get_records_sql($sql, array('badgeid' => $this->id, 'userid' => $userid));
502 * Checks if badges has award criteria set up.
504 * @return bool A status indicating badge has at least one criterion
506 public function has_criteria() {
507 if (count($this->criteria) > 0) {
514 * Returns badge award criteria
516 * @return array An array of badge criteria
518 public function get_criteria() {
522 if ($records = (array)$DB->get_records('badge_criteria', array('badgeid' => $this->id))) {
523 foreach ($records as $record) {
524 $criteria[$record->criteriatype] = award_criteria::build((array)$record);
532 * Get aggregation method for badge criteria
534 * @param int $criteriatype If none supplied, get overall aggregation method (optional)
535 * @return int One of BADGE_CRITERIA_AGGREGATION_ALL or BADGE_CRITERIA_AGGREGATION_ANY
537 public function get_aggregation_method($criteriatype = 0) {
539 $params = array('badgeid' => $this->id, 'criteriatype' => $criteriatype);
540 $aggregation = $DB->get_field('badge_criteria', 'method', $params, IGNORE_MULTIPLE);
543 return BADGE_CRITERIA_AGGREGATION_ALL;
550 * Checks if badge has expiry period or date set up.
552 * @return bool A status indicating badge can expire
554 public function can_expire() {
555 if ($this->expireperiod || $this->expiredate) {
562 * Calculates badge expiry date based on either expirydate or expiryperiod.
564 * @param int $timestamp Time of badge issue
565 * @return int A timestamp
567 public function calculate_expiry($timestamp) {
570 if (isset($this->expiredate)) {
571 $expiry = $this->expiredate;
572 } else if (isset($this->expireperiod)) {
573 $expiry = $timestamp + $this->expireperiod;
580 * Checks if badge has manual award criteria set.
582 * @return bool A status indicating badge can be awarded manually
584 public function has_manual_award_criteria() {
585 foreach ($this->criteria as $criterion) {
586 if ($criterion->criteriatype == BADGE_CRITERIA_TYPE_MANUAL) {
594 * Marks the badge as archived.
595 * For reporting and historical purposed we cannot completely delete badges.
596 * We will just change their status to BADGE_STATUS_ARCHIVED.
598 public function delete() {
599 $this->status = BADGE_STATUS_ARCHIVED;
605 * Sends notifications to users about awarded badges.
607 * @param badge $badge Badge that was issued
608 * @param int $userid Recipient ID
609 * @param string $issued Unique hash of an issued badge
610 * @param string $filepathhash File path hash of an issued badge for attachments
612 function badges_notify_badge_award(badge $badge, $userid, $issued, $filepathhash) {
615 $admin = get_admin();
616 $userfrom = new stdClass();
617 $userfrom->id = $admin->id;
618 $userfrom->email = !empty($CFG->badges_defaultissuercontact) ? $CFG->badges_defaultissuercontact : $admin->email;
619 foreach (get_all_user_name_fields() as $addname) {
620 $userfrom->$addname = !empty($CFG->badges_defaultissuername) ? '' : $admin->$addname;
622 $userfrom->firstname = !empty($CFG->badges_defaultissuername) ? $CFG->badges_defaultissuername : $admin->firstname;
623 $userfrom->maildisplay = true;
625 $issuedlink = html_writer::link(new moodle_url('/badges/badge.php', array('hash' => $issued)), $badge->name);
626 $userto = $DB->get_record('user', array('id' => $userid), '*', MUST_EXIST);
628 $params = new stdClass();
629 $params->badgename = $badge->name;
630 $params->username = fullname($userto);
631 $params->badgelink = $issuedlink;
632 $message = badge_message_from_template($badge->message, $params);
633 $plaintext = format_text_email($message, FORMAT_HTML);
636 $eventdata = new stdClass();
637 $eventdata->component = 'moodle';
638 $eventdata->name = 'badgerecipientnotice';
639 $eventdata->userfrom = $userfrom;
640 $eventdata->userto = $userto;
641 $eventdata->notification = 1;
642 $eventdata->subject = $badge->messagesubject;
643 $eventdata->fullmessage = $plaintext;
644 $eventdata->fullmessageformat = FORMAT_PLAIN;
645 $eventdata->fullmessagehtml = $message;
646 $eventdata->smallmessage = $plaintext;
648 // Attach badge image if possible.
649 if (!empty($CFG->allowattachments) && $badge->attachment && is_string($filepathhash)) {
650 $fs = get_file_storage();
651 $file = $fs->get_file_by_hash($filepathhash);
652 $eventdata->attachment = $file;
653 $eventdata->attachname = str_replace(' ', '_', $badge->name) . ".png";
655 message_send($eventdata);
657 message_send($eventdata);
660 // Notify badge creator about the award if they receive notifications every time.
661 if ($badge->notification == 1) {
662 $userfrom = core_user::get_noreply_user();
663 $userfrom->maildisplay = true;
665 $creator = $DB->get_record('user', array('id' => $badge->usercreated), '*', MUST_EXIST);
667 $a->user = fullname($userto);
668 $a->link = $issuedlink;
669 $creatormessage = get_string('creatorbody', 'badges', $a);
670 $creatorsubject = get_string('creatorsubject', 'badges', $badge->name);
672 $eventdata = new stdClass();
673 $eventdata->component = 'moodle';
674 $eventdata->name = 'badgecreatornotice';
675 $eventdata->userfrom = $userfrom;
676 $eventdata->userto = $creator;
677 $eventdata->notification = 1;
678 $eventdata->subject = $creatorsubject;
679 $eventdata->fullmessage = format_text_email($creatormessage, FORMAT_HTML);
680 $eventdata->fullmessageformat = FORMAT_PLAIN;
681 $eventdata->fullmessagehtml = $creatormessage;
682 $eventdata->smallmessage = $creatorsubject;
684 message_send($eventdata);
685 $DB->set_field('badge_issued', 'issuernotified', time(), array('badgeid' => $badge->id, 'userid' => $userid));
690 * Caclulates date for the next message digest to badge creators.
692 * @param in $schedule Type of message schedule BADGE_MESSAGE_DAILY|BADGE_MESSAGE_WEEKLY|BADGE_MESSAGE_MONTHLY.
693 * @return int Timestamp for next cron
695 function badges_calculate_message_schedule($schedule) {
699 case BADGE_MESSAGE_DAILY:
700 $nextcron = time() + 60 * 60 * 24;
702 case BADGE_MESSAGE_WEEKLY:
703 $nextcron = time() + 60 * 60 * 24 * 7;
705 case BADGE_MESSAGE_MONTHLY:
706 $nextcron = time() + 60 * 60 * 24 * 7 * 30;
714 * Replaces variables in a message template and returns text ready to be emailed to a user.
716 * @param string $message Message body.
717 * @return string Message with replaced values
719 function badge_message_from_template($message, $params) {
721 foreach ($params as $key => $value) {
722 $msg = str_replace("%$key%", $value, $msg);
731 * @param int Type of badges to return
732 * @param int Course ID for course badges
733 * @param string $sort An SQL field to sort by
734 * @param string $dir The sort direction ASC|DESC
735 * @param int $page The page or records to return
736 * @param int $perpage The number of records to return per page
737 * @param int $user User specific search
738 * @return array $badge Array of records matching criteria
740 function badges_get_badges($type, $courseid = 0, $sort = '', $dir = '', $page = 0, $perpage = BADGE_PERPAGE, $user = 0) {
744 $where = "b.status != :deleted AND b.type = :type ";
745 $params['deleted'] = BADGE_STATUS_ARCHIVED;
747 $userfields = array('b.id, b.name, b.status');
750 $userfields[] = 'bi.dateissued';
751 $userfields[] = 'bi.uniquehash';
752 $usersql = " LEFT JOIN {badge_issued} bi ON b.id = bi.badgeid AND bi.userid = :userid ";
753 $params['userid'] = $user;
754 $where .= " AND (b.status = 1 OR b.status = 3) ";
756 $fields = implode(', ', $userfields);
758 if ($courseid != 0 ) {
759 $where .= "AND b.courseid = :courseid ";
760 $params['courseid'] = $courseid;
763 $sorting = (($sort != '' && $dir != '') ? 'ORDER BY ' . $sort . ' ' . $dir : '');
764 $params['type'] = $type;
766 $sql = "SELECT $fields FROM {badge} b $usersql WHERE $where $sorting";
767 $records = $DB->get_records_sql($sql, $params, $page * $perpage, $perpage);
770 foreach ($records as $r) {
771 $badge = new badge($r->id);
772 $badges[$r->id] = $badge;
774 $badges[$r->id]->dateissued = $r->dateissued;
775 $badges[$r->id]->uniquehash = $r->uniquehash;
777 $badges[$r->id]->awards = $DB->count_records('badge_issued', array('badgeid' => $badge->id));
778 $badges[$r->id]->statstring = $badge->get_status_name();
785 * Get badges for a specific user.
787 * @param int $userid User ID
788 * @param int $courseid Badges earned by a user in a specific course
789 * @param int $page The page or records to return
790 * @param int $perpage The number of records to return per page
791 * @param string $search A simple string to search for
792 * @param bool $onlypublic Return only public badges
793 * @return array of badges ordered by decreasing date of issue
795 function badges_get_user_badges($userid, $courseid = 0, $page = 0, $perpage = 0, $search = '', $onlypublic = false) {
812 WHERE b.id = bi.badgeid
816 if (!empty($search)) {
817 $sql .= ' AND (' . $DB->sql_like('b.name', '?', false) . ') ';
818 $params[] = "%$search%";
821 $sql .= ' AND (bi.visible = 1) ';
824 if ($courseid != 0) {
825 $sql .= ' AND (b.courseid = ' . $courseid . ') ';
827 $sql .= ' ORDER BY bi.dateissued DESC';
828 $badges = $DB->get_records_sql($sql, $params, $page * $perpage, $perpage);
834 * Extends the course administration navigation with the Badges page
836 * @param navigation_node $coursenode
837 * @param object $course
839 function badges_add_course_navigation(navigation_node $coursenode, stdClass $course) {
842 $coursecontext = context_course::instance($course->id);
843 $isfrontpage = (!$coursecontext || $course->id == $SITE->id);
844 $canmanage = has_any_capability(array('moodle/badges:viewawarded',
845 'moodle/badges:createbadge',
846 'moodle/badges:awardbadge',
847 'moodle/badges:configurecriteria',
848 'moodle/badges:configuremessages',
849 'moodle/badges:configuredetails',
850 'moodle/badges:deletebadge'), $coursecontext);
852 if (!empty($CFG->enablebadges) && !empty($CFG->badges_allowcoursebadges) && !$isfrontpage && $canmanage) {
853 $coursenode->add(get_string('coursebadges', 'badges'), null,
854 navigation_node::TYPE_CONTAINER, null, 'coursebadges',
855 new pix_icon('i/badge', get_string('coursebadges', 'badges')));
857 $url = new moodle_url('/badges/index.php', array('type' => BADGE_TYPE_COURSE, 'id' => $course->id));
859 $coursenode->get('coursebadges')->add(get_string('managebadges', 'badges'), $url,
860 navigation_node::TYPE_SETTING, null, 'coursebadges');
862 if (has_capability('moodle/badges:createbadge', $coursecontext)) {
863 $url = new moodle_url('/badges/newbadge.php', array('type' => BADGE_TYPE_COURSE, 'id' => $course->id));
865 $coursenode->get('coursebadges')->add(get_string('newbadge', 'badges'), $url,
866 navigation_node::TYPE_SETTING, null, 'newbadge');
872 * Triggered when badge is manually awarded.
874 * @param object $data
877 function badges_award_handle_manual_criteria_review(stdClass $data) {
878 $criteria = $data->crit;
879 $userid = $data->userid;
880 $badge = new badge($criteria->badgeid);
882 if (!$badge->is_active() || $badge->is_issued($userid)) {
886 if ($criteria->review($userid)) {
887 $criteria->mark_complete($userid);
889 if ($badge->criteria[BADGE_CRITERIA_TYPE_OVERALL]->review($userid)) {
890 $badge->criteria[BADGE_CRITERIA_TYPE_OVERALL]->mark_complete($userid);
891 $badge->issue($userid);
899 * Process badge image from form data
901 * @param badge $badge Badge object
902 * @param string $iconfile Original file
904 function badges_process_badge_image(badge $badge, $iconfile) {
906 require_once($CFG->libdir. '/gdlib.php');
908 if (!empty($CFG->gdversion)) {
909 process_new_icon($badge->get_context(), 'badges', 'badgeimage', $badge->id, $iconfile);
912 // Clean up file draft area after badge image has been saved.
913 $context = context_user::instance($USER->id, MUST_EXIST);
914 $fs = get_file_storage();
915 $fs->delete_area_files($context->id, 'user', 'draft');
922 * @param badge $badge Badge object
923 * @param stdClass $context
924 * @param string $size
926 function print_badge_image(badge $badge, stdClass $context, $size = 'small') {
927 $fsize = ($size == 'small') ? 'f2' : 'f1';
929 $imageurl = moodle_url::make_pluginfile_url($context->id, 'badges', 'badgeimage', $badge->id, '/', $fsize, false);
930 // Appending a random parameter to image link to forse browser reload the image.
931 $imageurl->param('refresh', rand(1, 10000));
932 $attributes = array('src' => $imageurl, 'alt' => s($badge->name), 'class' => 'activatebadge');
934 return html_writer::empty_tag('img', $attributes);
940 * @param string $hash Unique hash of an issued badge.
941 * @param int $badgeid ID of the original badge.
942 * @param int $userid ID of badge recipient (optional).
943 * @param boolean $pathhash Return file pathhash instead of image url (optional).
944 * @return string|url Returns either new file path hash or new file URL
946 function badges_bake($hash, $badgeid, $userid = 0, $pathhash = false) {
948 require_once(dirname(dirname(__FILE__)) . '/badges/lib/bakerlib.php');
950 $badge = new badge($badgeid);
951 $badge_context = $badge->get_context();
952 $userid = ($userid) ? $userid : $USER->id;
953 $user_context = context_user::instance($userid);
955 $fs = get_file_storage();
956 if (!$fs->file_exists($user_context->id, 'badges', 'userbadge', $badge->id, '/', $hash . '.png')) {
957 if ($file = $fs->get_file($badge_context->id, 'badges', 'badgeimage', $badge->id, '/', 'f1.png')) {
958 $contents = $file->get_content();
960 $filehandler = new PNG_MetaDataHandler($contents);
961 $assertion = new moodle_url('/badges/assertion.php', array('b' => $hash));
962 if ($filehandler->check_chunks("tEXt", "openbadges")) {
963 // Add assertion URL tExt chunk.
964 $newcontents = $filehandler->add_chunks("tEXt", "openbadges", $assertion->out(false));
966 'contextid' => $user_context->id,
967 'component' => 'badges',
968 'filearea' => 'userbadge',
969 'itemid' => $badge->id,
971 'filename' => $hash . '.png',
974 // Create a file with added contents.
975 $newfile = $fs->create_file_from_string($fileinfo, $newcontents);
977 return $newfile->get_pathnamehash();
981 debugging('Error baking badge image!', DEBUG_DEVELOPER);
986 // If file exists and we just need its path hash, return it.
988 $file = $fs->get_file($user_context->id, 'badges', 'userbadge', $badge->id, '/', $hash . '.png');
989 return $file->get_pathnamehash();
992 $fileurl = moodle_url::make_pluginfile_url($user_context->id, 'badges', 'userbadge', $badge->id, '/', $hash, true);
997 * Returns external backpack settings and badges from this backpack.
999 * This function first checks if badges for the user are cached and
1000 * tries to retrieve them from the cache. Otherwise, badges are obtained
1001 * through curl request to the backpack.
1003 * @param int $userid Backpack user ID.
1004 * @param boolean $refresh Refresh badges collection in cache.
1005 * @return null|object Returns null is there is no backpack or object with backpack settings.
1007 function get_backpack_settings($userid, $refresh = false) {
1009 require_once(dirname(dirname(__FILE__)) . '/badges/lib/backpacklib.php');
1011 // Try to get badges from cache first.
1012 $badgescache = cache::make('core', 'externalbadges');
1013 $out = $badgescache->get($userid);
1014 if ($out !== false && !$refresh) {
1017 // Get badges through curl request to the backpack.
1018 $record = $DB->get_record('badge_backpack', array('userid' => $userid));
1020 $backpack = new OpenBadgesBackpackHandler($record);
1021 $out = new stdClass();
1022 $out->backpackurl = $backpack->get_url();
1024 if ($collections = $DB->get_records('badge_external', array('backpackid' => $record->id))) {
1025 $out->totalcollections = count($collections);
1026 $out->totalbadges = 0;
1027 $out->badges = array();
1028 foreach ($collections as $collection) {
1029 $badges = $backpack->get_badges($collection->collectionid);
1030 if (isset($badges->badges)) {
1031 $out->badges = array_merge($out->badges, $badges->badges);
1032 $out->totalbadges += count($out->badges);
1034 $out->badges = array_merge($out->badges, array());
1038 $out->totalbadges = 0;
1039 $out->totalcollections = 0;
1042 $badgescache->set($userid, $out);
1050 * Download all user badges in zip archive.
1052 * @param int $userid ID of badge owner.
1054 function badges_download($userid) {
1056 $context = context_user::instance($userid);
1057 $records = $DB->get_records('badge_issued', array('userid' => $userid));
1059 // Get list of files to download.
1060 $fs = get_file_storage();
1061 $filelist = array();
1062 foreach ($records as $issued) {
1063 $badge = new badge($issued->badgeid);
1064 // Need to make image name user-readable and unique using filename safe characters.
1065 $name = $badge->name . ' ' . userdate($issued->dateissued, '%d %b %Y') . ' ' . hash('crc32', $badge->id);
1066 $name = str_replace(' ', '_', $name);
1067 if ($file = $fs->get_file($context->id, 'badges', 'userbadge', $issued->badgeid, '/', $issued->uniquehash . '.png')) {
1068 $filelist[$name . '.png'] = $file;
1072 // Zip files and sent them to a user.
1073 $tempzip = tempnam($CFG->tempdir.'/', 'mybadges');
1074 $zipper = new zip_packer();
1075 if ($zipper->archive_to_pathname($filelist, $tempzip)) {
1076 send_temp_file($tempzip, 'badges.zip');
1078 debugging("Problems with archiving the files.");
1083 * Print badges on user profile page.
1085 * @param int $userid User ID.
1086 * @param int $courseid Course if we need to filter badges (optional).
1088 function profile_display_badges($userid, $courseid = 0) {
1089 global $CFG, $PAGE, $USER, $SITE;
1090 require_once($CFG->dirroot . '/badges/renderer.php');
1092 // Determine context.
1094 $context = context_user::instance($USER->id);
1096 $context = context_system::instance();
1099 if ($USER->id == $userid || has_capability('moodle/badges:viewotherbadges', $context)) {
1100 $records = badges_get_user_badges($userid, $courseid, null, null, null, true);
1101 $renderer = new core_badges_renderer($PAGE, '');
1103 // Print local badges.
1105 $left = get_string('localbadgesp', 'badges', format_string($SITE->fullname));
1106 $right = $renderer->print_badges_list($records, $userid, true);
1107 echo html_writer::tag('dt', $left);
1108 echo html_writer::tag('dd', $right);
1111 // Print external badges.
1112 if ($courseid == 0 && !empty($CFG->badges_allowexternalbackpack)) {
1113 $backpack = get_backpack_settings($userid);
1114 if (isset($backpack->totalbadges) && $backpack->totalbadges !== 0) {
1115 $left = get_string('externalbadgesp', 'badges');
1116 $right = $renderer->print_badges_list($backpack->badges, $userid, true, true);
1117 echo html_writer::tag('dt', $left);
1118 echo html_writer::tag('dd', $right);
1125 * Checks if badges can be pushed to external backpack.
1127 * @return string Code of backpack accessibility status.
1129 function badges_check_backpack_accessibility() {
1131 include_once $CFG->libdir . '/filelib.php';
1133 // Using fake assertion url to check whether backpack can access the web site.
1134 $fakeassertion = new moodle_url('/badges/assertion.php', array('b' => 'abcd1234567890'));
1136 // Curl request to http://backpack.openbadges.org/baker.
1139 'FRESH_CONNECT' => true,
1140 'RETURNTRANSFER' => true,
1142 'CONNECTTIMEOUT' => 2,
1144 $location = 'http://backpack.openbadges.org/baker';
1145 $out = $curl->get($location, array('assertion' => $fakeassertion->out(false)), $options);
1147 $data = json_decode($out);
1148 if (!empty($curl->error)) {
1149 return 'curl-request-timeout';
1151 if (isset($data->code) && $data->code == 'http-unreachable') {
1152 return 'http-unreachable';
1162 * Checks if user has external backpack connected.
1164 * @param int $userid ID of a user.
1165 * @return bool True|False whether backpack connection exists.
1167 function badges_user_has_backpack($userid) {
1169 return $DB->record_exists('badge_backpack', array('userid' => $userid));
1173 * Handles what happens to the course badges when a course is deleted.
1175 * @param int $courseid course ID.
1178 function badges_handle_course_deletion($courseid) {
1180 include_once $CFG->libdir . '/filelib.php';
1182 $systemcontext = context_system::instance();
1183 $coursecontext = context_course::instance($courseid);
1184 $fs = get_file_storage();
1186 // Move badges images to the system context.
1187 $fs->move_area_files_to_new_context($coursecontext->id, $systemcontext->id, 'badges', 'badgeimage');
1189 // Get all course badges.
1190 $badges = $DB->get_records('badge', array('type' => BADGE_TYPE_COURSE, 'courseid' => $courseid));
1191 foreach ($badges as $badge) {
1192 // Archive badges in this course.
1193 $toupdate = new stdClass();
1194 $toupdate->id = $badge->id;
1195 $toupdate->type = BADGE_TYPE_SITE;
1196 $toupdate->courseid = null;
1197 $toupdate->status = BADGE_STATUS_ARCHIVED;
1198 $DB->update_record('badge', $toupdate);
1203 * Loads JS files required for backpack support.
1208 function badges_setup_backpack_js() {
1210 if (!empty($CFG->badges_allowexternalbackpack)) {
1211 $PAGE->requires->string_for_js('error:backpackproblem', 'badges');
1212 $protocol = (strpos($CFG->wwwroot, 'https://') === 0) ? 'https://' : 'http://';
1213 $PAGE->requires->js(new moodle_url($protocol . 'backpack.openbadges.org/issuer.js'), true);
1214 $PAGE->requires->js('/badges/backpack.js', true);