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 * Functions used by gradebook plugins and reports.
20 * @package core_grades
21 * @copyright 2009 Petr Skoda and Nicolas Connault
22 * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
25 require_once($CFG->libdir . '/gradelib.php');
26 require_once($CFG->dirroot . '/grade/export/lib.php');
29 * This class iterates over all users that are graded in a course.
30 * Returns detailed info about users and their grades.
32 * @author Petr Skoda <skodak@moodle.org>
33 * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
35 class graded_users_iterator {
38 * The couse whose users we are interested in
43 * An array of grade items or null if only user data was requested
45 protected $grade_items;
48 * The group ID we are interested in. 0 means all groups.
53 * A recordset of graded users
58 * A recordset of user grades (grade_grade instances)
63 * Array used when moving to next user while iterating through the grades recordset
65 protected $gradestack;
68 * The first field of the users table by which the array of users will be sorted
70 protected $sortfield1;
73 * Should sortfield1 be ASC or DESC
75 protected $sortorder1;
78 * The second field of the users table by which the array of users will be sorted
80 protected $sortfield2;
83 * Should sortfield2 be ASC or DESC
85 protected $sortorder2;
88 * Should users whose enrolment has been suspended be ignored?
90 protected $onlyactive = false;
93 * Enable user custom fields
95 protected $allowusercustomfields = false;
98 * List of suspended users in course. This includes users whose enrolment status is suspended
99 * or enrolment has expired or not started.
101 protected $suspendedusers = array();
106 * @param object $course A course object
107 * @param array $grade_items array of grade items, if not specified only user info returned
108 * @param int $groupid iterate only group users if present
109 * @param string $sortfield1 The first field of the users table by which the array of users will be sorted
110 * @param string $sortorder1 The order in which the first sorting field will be sorted (ASC or DESC)
111 * @param string $sortfield2 The second field of the users table by which the array of users will be sorted
112 * @param string $sortorder2 The order in which the second sorting field will be sorted (ASC or DESC)
114 public function __construct($course, $grade_items=null, $groupid=0,
115 $sortfield1='lastname', $sortorder1='ASC',
116 $sortfield2='firstname', $sortorder2='ASC') {
117 $this->course = $course;
118 $this->grade_items = $grade_items;
119 $this->groupid = $groupid;
120 $this->sortfield1 = $sortfield1;
121 $this->sortorder1 = $sortorder1;
122 $this->sortfield2 = $sortfield2;
123 $this->sortorder2 = $sortorder2;
125 $this->gradestack = array();
129 * Initialise the iterator
131 * @return boolean success
133 public function init() {
138 export_verify_grades($this->course->id);
139 $course_item = grade_item::fetch_course_item($this->course->id);
140 if ($course_item->needsupdate) {
141 // Can not calculate all final grades - sorry.
145 $coursecontext = context_course::instance($this->course->id);
147 list($relatedctxsql, $relatedctxparams) = $DB->get_in_or_equal($coursecontext->get_parent_context_ids(true), SQL_PARAMS_NAMED, 'relatedctx');
148 list($gradebookroles_sql, $params) = $DB->get_in_or_equal(explode(',', $CFG->gradebookroles), SQL_PARAMS_NAMED, 'grbr');
149 list($enrolledsql, $enrolledparams) = get_enrolled_sql($coursecontext, '', 0, $this->onlyactive);
151 $params = array_merge($params, $enrolledparams, $relatedctxparams);
153 if ($this->groupid) {
154 $groupsql = "INNER JOIN {groups_members} gm ON gm.userid = u.id";
155 $groupwheresql = "AND gm.groupid = :groupid";
156 // $params contents: gradebookroles
157 $params['groupid'] = $this->groupid;
163 if (empty($this->sortfield1)) {
164 // We must do some sorting even if not specified.
165 $ofields = ", u.id AS usrt";
169 $ofields = ", u.$this->sortfield1 AS usrt1";
170 $order = "usrt1 $this->sortorder1";
171 if (!empty($this->sortfield2)) {
172 $ofields .= ", u.$this->sortfield2 AS usrt2";
173 $order .= ", usrt2 $this->sortorder2";
175 if ($this->sortfield1 != 'id' and $this->sortfield2 != 'id') {
176 // User order MUST be the same in both queries,
177 // must include the only unique user->id if not already present.
178 $ofields .= ", u.id AS usrt";
179 $order .= ", usrt ASC";
184 $customfieldssql = '';
185 if ($this->allowusercustomfields && !empty($CFG->grade_export_customprofilefields)) {
186 $customfieldscount = 0;
187 $customfieldsarray = grade_helper::get_user_profile_fields($this->course->id, $this->allowusercustomfields);
188 foreach ($customfieldsarray as $field) {
189 if (!empty($field->customid)) {
190 $customfieldssql .= "
191 LEFT JOIN (SELECT * FROM {user_info_data}
192 WHERE fieldid = :cf$customfieldscount) cf$customfieldscount
193 ON u.id = cf$customfieldscount.userid";
194 $userfields .= ", cf$customfieldscount.data AS customfield_{$field->shortname}";
195 $params['cf'.$customfieldscount] = $field->customid;
196 $customfieldscount++;
201 $users_sql = "SELECT $userfields $ofields
203 JOIN ($enrolledsql) je ON je.id = u.id
204 $groupsql $customfieldssql
206 SELECT DISTINCT ra.userid
207 FROM {role_assignments} ra
208 WHERE ra.roleid $gradebookroles_sql
209 AND ra.contextid $relatedctxsql
210 ) rainner ON rainner.userid = u.id
214 $this->users_rs = $DB->get_recordset_sql($users_sql, $params);
216 if (!$this->onlyactive) {
217 $context = context_course::instance($this->course->id);
218 $this->suspendedusers = get_suspended_userids($context);
220 $this->suspendedusers = array();
223 if (!empty($this->grade_items)) {
224 $itemids = array_keys($this->grade_items);
225 list($itemidsql, $grades_params) = $DB->get_in_or_equal($itemids, SQL_PARAMS_NAMED, 'items');
226 $params = array_merge($params, $grades_params);
228 $grades_sql = "SELECT g.* $ofields
229 FROM {grade_grades} g
230 JOIN {user} u ON g.userid = u.id
231 JOIN ($enrolledsql) je ON je.id = u.id
234 SELECT DISTINCT ra.userid
235 FROM {role_assignments} ra
236 WHERE ra.roleid $gradebookroles_sql
237 AND ra.contextid $relatedctxsql
238 ) rainner ON rainner.userid = u.id
240 AND g.itemid $itemidsql
242 ORDER BY $order, g.itemid ASC";
243 $this->grades_rs = $DB->get_recordset_sql($grades_sql, $params);
245 $this->grades_rs = false;
252 * Returns information about the next user
253 * @return mixed array of user info, all grades and feedback or null when no more users found
255 public function next_user() {
256 if (!$this->users_rs) {
257 return false; // no users present
260 if (!$this->users_rs->valid()) {
261 if ($current = $this->_pop()) {
262 // this is not good - user or grades updated between the two reads above :-(
265 return false; // no more users
267 $user = $this->users_rs->current();
268 $this->users_rs->next();
271 // find grades of this user
272 $grade_records = array();
274 if (!$current = $this->_pop()) {
275 break; // no more grades
278 if (empty($current->userid)) {
282 if ($current->userid != $user->id) {
283 // grade of the next user, we have all for this user
284 $this->_push($current);
288 $grade_records[$current->itemid] = $current;
292 $feedbacks = array();
294 if (!empty($this->grade_items)) {
295 foreach ($this->grade_items as $grade_item) {
296 if (!isset($feedbacks[$grade_item->id])) {
297 $feedbacks[$grade_item->id] = new stdClass();
299 if (array_key_exists($grade_item->id, $grade_records)) {
300 $feedbacks[$grade_item->id]->feedback = $grade_records[$grade_item->id]->feedback;
301 $feedbacks[$grade_item->id]->feedbackformat = $grade_records[$grade_item->id]->feedbackformat;
302 unset($grade_records[$grade_item->id]->feedback);
303 unset($grade_records[$grade_item->id]->feedbackformat);
304 $grades[$grade_item->id] = new grade_grade($grade_records[$grade_item->id], false);
306 $feedbacks[$grade_item->id]->feedback = '';
307 $feedbacks[$grade_item->id]->feedbackformat = FORMAT_MOODLE;
308 $grades[$grade_item->id] =
309 new grade_grade(array('userid'=>$user->id, 'itemid'=>$grade_item->id), false);
314 // Set user suspended status.
315 $user->suspendedenrolment = isset($this->suspendedusers[$user->id]);
316 $result = new stdClass();
317 $result->user = $user;
318 $result->grades = $grades;
319 $result->feedbacks = $feedbacks;
324 * Close the iterator, do not forget to call this function
326 public function close() {
327 if ($this->users_rs) {
328 $this->users_rs->close();
329 $this->users_rs = null;
331 if ($this->grades_rs) {
332 $this->grades_rs->close();
333 $this->grades_rs = null;
335 $this->gradestack = array();
339 * Should all enrolled users be exported or just those with an active enrolment?
341 * @param bool $onlyactive True to limit the export to users with an active enrolment
343 public function require_active_enrolment($onlyactive = true) {
344 if (!empty($this->users_rs)) {
345 debugging('Calling require_active_enrolment() has no effect unless you call init() again', DEBUG_DEVELOPER);
347 $this->onlyactive = $onlyactive;
351 * Allow custom fields to be included
353 * @param bool $allow Whether to allow custom fields or not
356 public function allow_user_custom_fields($allow = true) {
358 $this->allowusercustomfields = true;
360 $this->allowusercustomfields = false;
365 * Add a grade_grade instance to the grade stack
367 * @param grade_grade $grade Grade object
371 private function _push($grade) {
372 array_push($this->gradestack, $grade);
377 * Remove a grade_grade instance from the grade stack
379 * @return grade_grade current grade object
381 private function _pop() {
383 if (empty($this->gradestack)) {
384 if (empty($this->grades_rs) || !$this->grades_rs->valid()) {
385 return null; // no grades present
388 $current = $this->grades_rs->current();
390 $this->grades_rs->next();
394 return array_pop($this->gradestack);
400 * Print a selection popup form of the graded users in a course.
402 * @deprecated since 2.0
404 * @param int $course id of the course
405 * @param string $actionpage The page receiving the data from the popoup form
406 * @param int $userid id of the currently selected user (or 'all' if they are all selected)
407 * @param int $groupid id of requested group, 0 means all
408 * @param int $includeall bool include all option
409 * @param bool $return If true, will return the HTML, otherwise, will print directly
412 function print_graded_users_selector($course, $actionpage, $userid=0, $groupid=0, $includeall=true, $return=false) {
413 global $CFG, $USER, $OUTPUT;
414 return $OUTPUT->render(grade_get_graded_users_select(substr($actionpage, 0, strpos($actionpage, '/')), $course, $userid, $groupid, $includeall));
417 function grade_get_graded_users_select($report, $course, $userid, $groupid, $includeall) {
420 if (is_null($userid)) {
423 $coursecontext = context_course::instance($course->id);
424 $defaultgradeshowactiveenrol = !empty($CFG->grade_report_showonlyactiveenrol);
425 $showonlyactiveenrol = get_user_preferences('grade_report_showonlyactiveenrol', $defaultgradeshowactiveenrol);
426 $showonlyactiveenrol = $showonlyactiveenrol || !has_capability('moodle/course:viewsuspendedusers', $coursecontext);
427 $menu = array(); // Will be a list of userid => user name
428 $menususpendedusers = array(); // Suspended users go to a separate optgroup.
429 $gui = new graded_users_iterator($course, null, $groupid);
430 $gui->require_active_enrolment($showonlyactiveenrol);
432 $label = get_string('selectauser', 'grades');
434 $menu[0] = get_string('allusers', 'grades');
435 $label = get_string('selectalloroneuser', 'grades');
437 while ($userdata = $gui->next_user()) {
438 $user = $userdata->user;
439 $userfullname = fullname($user);
440 if ($user->suspendedenrolment) {
441 $menususpendedusers[$user->id] = $userfullname;
443 $menu[$user->id] = $userfullname;
449 $menu[0] .= " (" . (count($menu) + count($menususpendedusers) - 1) . ")";
452 if (!empty($menususpendedusers)) {
453 $menu[] = array(get_string('suspendedusers') => $menususpendedusers);
455 $select = new single_select(new moodle_url('/grade/report/'.$report.'/index.php', array('id'=>$course->id)), 'userid', $menu, $userid);
456 $select->label = $label;
457 $select->formid = 'choosegradeuser';
462 * Hide warning about changed grades during upgrade to 2.8.
464 * @param int $courseid The current course id.
466 function hide_natural_aggregation_upgrade_notice($courseid) {
467 unset_config('show_sumofgrades_upgrade_' . $courseid);
471 * Hide warning about changed grades during upgrade to 2.8.
473 * @param int $courseid The current course id.
475 function hide_aggregatesubcats_upgrade_notice($courseid) {
476 unset_config('show_aggregatesubcats_upgrade_' . $courseid);
480 * Print warning about changed grades during upgrade to 2.8.
482 * @param int $courseid The current course id.
483 * @param context $context The course context.
484 * @param string $thispage The relative path for the current page. E.g. /grade/report/user/index.php
485 * @param boolean $return return as string
487 * @return nothing or string if $return true
489 function print_natural_aggregation_upgrade_notice($courseid, $context, $thispage, $return=false) {
493 $hidesubcatswarning = optional_param('seenaggregatesubcatsupgradedgrades', false, PARAM_BOOL) && confirm_sesskey();
494 $showsubcatswarning = get_config('core', 'show_aggregatesubcats_upgrade_' . $courseid);
495 $hidenaturalwarning = optional_param('seensumofgradesupgradedgrades', false, PARAM_BOOL) && confirm_sesskey();
496 $shownaturalwarning = get_config('core', 'show_sumofgrades_upgrade_' . $courseid);
498 // Do not do anything if they are not a teacher.
499 if ($hidesubcatswarning || $showsubcatswarning || $hidenaturalwarning || $shownaturalwarning) {
500 if (!has_capability('moodle/grade:manage', $context)) {
505 // Hide the warning if the user told it to go away.
506 if ($hidenaturalwarning) {
507 hide_natural_aggregation_upgrade_notice($courseid);
509 // Hide the warning if the user told it to go away.
510 if ($hidesubcatswarning) {
511 hide_aggregatesubcats_upgrade_notice($courseid);
514 if (!$hidenaturalwarning && $shownaturalwarning) {
515 $message = get_string('sumofgradesupgradedgrades', 'grades');
516 $hidemessage = get_string('upgradedgradeshidemessage', 'grades');
517 $urlparams = array( 'id' => $courseid,
518 'seensumofgradesupgradedgrades' => true,
519 'sesskey' => sesskey());
520 $goawayurl = new moodle_url($thispage, $urlparams);
521 $goawaybutton = $OUTPUT->single_button($goawayurl, $hidemessage, 'get');
522 $html .= $OUTPUT->notification($message, 'notifysuccess');
523 $html .= $goawaybutton;
526 if (!$hidesubcatswarning && $showsubcatswarning) {
527 $message = get_string('aggregatesubcatsupgradedgrades', 'grades');
528 $hidemessage = get_string('upgradedgradeshidemessage', 'grades');
529 $urlparams = array( 'id' => $courseid,
530 'seenaggregatesubcatsupgradedgrades' => true,
531 'sesskey' => sesskey());
532 $goawayurl = new moodle_url($thispage, $urlparams);
533 $goawaybutton = $OUTPUT->single_button($goawayurl, $hidemessage, 'get');
534 $html .= $OUTPUT->notification($message, 'notifysuccess');
535 $html .= $goawaybutton;
546 * Print grading plugin selection popup form.
548 * @param array $plugin_info An array of plugins containing information for the selector
549 * @param boolean $return return as string
551 * @return nothing or string if $return true
553 function print_grade_plugin_selector($plugin_info, $active_type, $active_plugin, $return=false) {
554 global $CFG, $OUTPUT, $PAGE;
560 foreach ($plugin_info as $plugin_type => $plugins) {
561 if ($plugin_type == 'strings') {
565 $first_plugin = reset($plugins);
567 $sectionname = $plugin_info['strings'][$plugin_type];
570 foreach ($plugins as $plugin) {
571 $link = $plugin->link->out(false);
572 $section[$link] = $plugin->string;
574 if ($plugin_type === $active_type and $plugin->id === $active_plugin) {
580 $menu[] = array($sectionname=>$section);
584 // finally print/return the popup form
586 $select = new url_select($menu, $active, null, 'choosepluginreport');
587 $select->set_label(get_string('gradereport', 'grades'), array('class' => 'accesshide'));
589 return $OUTPUT->render($select);
591 echo $OUTPUT->render($select);
594 // only one option - no plugin selector needed
600 * Print grading plugin selection tab-based navigation.
602 * @param string $active_type type of plugin on current page - import, export, report or edit
603 * @param string $active_plugin active plugin type - grader, user, cvs, ...
604 * @param array $plugin_info Array of plugins
605 * @param boolean $return return as string
607 * @return nothing or string if $return true
609 function grade_print_tabs($active_type, $active_plugin, $plugin_info, $return=false) {
610 global $CFG, $COURSE;
612 if (!isset($currenttab)) { //TODO: this is weird
618 $bottom_row = array();
619 $inactive = array($active_plugin);
620 $activated = array($active_type);
625 foreach ($plugin_info as $plugin_type => $plugins) {
626 if ($plugin_type == 'strings') {
630 // If $plugins is actually the definition of a child-less parent link:
631 if (!empty($plugins->id)) {
632 $string = $plugins->string;
633 if (!empty($plugin_info[$active_type]->parent)) {
634 $string = $plugin_info[$active_type]->parent->string;
637 $top_row[] = new tabobject($plugin_type, $plugins->link, $string);
641 $first_plugin = reset($plugins);
642 $url = $first_plugin->link;
644 if ($plugin_type == 'report') {
645 $url = $CFG->wwwroot.'/grade/report/index.php?id='.$COURSE->id;
648 $top_row[] = new tabobject($plugin_type, $url, $plugin_info['strings'][$plugin_type]);
650 if ($active_type == $plugin_type) {
651 foreach ($plugins as $plugin) {
652 $bottom_row[] = new tabobject($plugin->id, $plugin->link, $plugin->string);
653 if ($plugin->id == $active_plugin) {
654 $inactive = array($plugin->id);
661 $tabs[] = $bottom_row;
664 return print_tabs($tabs, $active_plugin, $inactive, $activated, true);
666 print_tabs($tabs, $active_plugin, $inactive, $activated);
671 * grade_get_plugin_info
673 * @param int $courseid The course id
674 * @param string $active_type type of plugin on current page - import, export, report or edit
675 * @param string $active_plugin active plugin type - grader, user, cvs, ...
679 function grade_get_plugin_info($courseid, $active_type, $active_plugin) {
682 $context = context_course::instance($courseid);
684 $plugin_info = array();
687 $url_prefix = $CFG->wwwroot . '/grade/';
690 $plugin_info['strings'] = grade_helper::get_plugin_strings();
692 if ($reports = grade_helper::get_plugins_reports($courseid)) {
693 $plugin_info['report'] = $reports;
696 if ($settings = grade_helper::get_info_manage_settings($courseid)) {
697 $plugin_info['settings'] = $settings;
700 if ($scale = grade_helper::get_info_scales($courseid)) {
701 $plugin_info['scale'] = array('view'=>$scale);
704 if ($outcomes = grade_helper::get_info_outcomes($courseid)) {
705 $plugin_info['outcome'] = $outcomes;
708 if ($letters = grade_helper::get_info_letters($courseid)) {
709 $plugin_info['letter'] = $letters;
712 if ($imports = grade_helper::get_plugins_import($courseid)) {
713 $plugin_info['import'] = $imports;
716 if ($exports = grade_helper::get_plugins_export($courseid)) {
717 $plugin_info['export'] = $exports;
720 foreach ($plugin_info as $plugin_type => $plugins) {
721 if (!empty($plugins->id) && $active_plugin == $plugins->id) {
722 $plugin_info['strings']['active_plugin_str'] = $plugins->string;
725 foreach ($plugins as $plugin) {
726 if (is_a($plugin, 'grade_plugin_info')) {
727 if ($active_plugin == $plugin->id) {
728 $plugin_info['strings']['active_plugin_str'] = $plugin->string;
734 foreach ($plugin_info as $plugin_type => $plugins) {
735 if (!empty($plugins->id) && $active_plugin == $plugins->id) {
736 $plugin_info['strings']['active_plugin_str'] = $plugins->string;
739 foreach ($plugins as $plugin) {
740 if (is_a($plugin, 'grade_plugin_info')) {
741 if ($active_plugin == $plugin->id) {
742 $plugin_info['strings']['active_plugin_str'] = $plugin->string;
752 * A simple class containing info about grade plugins.
753 * Can be subclassed for special rules
755 * @package core_grades
756 * @copyright 2009 Nicolas Connault
757 * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
759 class grade_plugin_info {
761 * A unique id for this plugin
767 * A URL to access this plugin
773 * The name of this plugin
779 * Another grade_plugin_info object, parent of the current one
788 * @param int $id A unique id for this plugin
789 * @param string $link A URL to access this plugin
790 * @param string $string The name of this plugin
791 * @param object $parent Another grade_plugin_info object, parent of the current one
795 public function __construct($id, $link, $string, $parent=null) {
798 $this->string = $string;
799 $this->parent = $parent;
804 * Prints the page headers, breadcrumb trail, page heading, (optional) dropdown navigation menu and
805 * (optional) navigation tabs for any gradebook page. All gradebook pages MUST use these functions
806 * in favour of the usual print_header(), print_header_simple(), print_heading() etc.
807 * !IMPORTANT! Use of tabs.php file in gradebook pages is forbidden unless tabs are switched off at
808 * the site level for the gradebook ($CFG->grade_navmethod = GRADE_NAVMETHOD_DROPDOWN).
810 * @param int $courseid Course id
811 * @param string $active_type The type of the current page (report, settings,
812 * import, export, scales, outcomes, letters)
813 * @param string $active_plugin The plugin of the current page (grader, fullview etc...)
814 * @param string $heading The heading of the page. Tries to guess if none is given
815 * @param boolean $return Whether to return (true) or echo (false) the HTML generated by this function
816 * @param string $bodytags Additional attributes that will be added to the <body> tag
817 * @param string $buttons Additional buttons to display on the page
818 * @param boolean $shownavigation should the gradebook navigation drop down (or tabs) be shown?
819 * @param string $headerhelpidentifier The help string identifier if required.
820 * @param string $headerhelpcomponent The component for the help string.
821 * @param stdClass $user The user object for use with the user context header.
823 * @return string HTML code or nothing if $return == false
825 function print_grade_page_head($courseid, $active_type, $active_plugin=null,
826 $heading = false, $return=false,
827 $buttons=false, $shownavigation=true, $headerhelpidentifier = null, $headerhelpcomponent = null,
829 global $CFG, $OUTPUT, $PAGE;
831 if ($active_type === 'preferences') {
832 // In Moodle 2.8 report preferences were moved under 'settings'. Allow backward compatibility for 3rd party grade reports.
833 $active_type = 'settings';
836 $plugin_info = grade_get_plugin_info($courseid, $active_type, $active_plugin);
838 // Determine the string of the active plugin
839 $stractive_plugin = ($active_plugin) ? $plugin_info['strings']['active_plugin_str'] : $heading;
840 $stractive_type = $plugin_info['strings'][$active_type];
842 if (empty($plugin_info[$active_type]->id) || !empty($plugin_info[$active_type]->parent)) {
843 $title = $PAGE->course->fullname.': ' . $stractive_type . ': ' . $stractive_plugin;
845 $title = $PAGE->course->fullname.': ' . $stractive_plugin;
848 if ($active_type == 'report') {
849 $PAGE->set_pagelayout('report');
851 $PAGE->set_pagelayout('admin');
853 $PAGE->set_title(get_string('grades') . ': ' . $stractive_type);
854 $PAGE->set_heading($title);
855 if ($buttons instanceof single_button) {
856 $buttons = $OUTPUT->render($buttons);
858 $PAGE->set_button($buttons);
859 if ($courseid != SITEID) {
860 grade_extend_settings($plugin_info, $courseid);
863 $returnval = $OUTPUT->header();
869 // Guess heading if not given explicitly
871 $heading = $stractive_plugin;
874 if ($shownavigation) {
876 if ($courseid != SITEID &&
877 ($CFG->grade_navmethod == GRADE_NAVMETHOD_COMBO || $CFG->grade_navmethod == GRADE_NAVMETHOD_DROPDOWN)) {
878 // It's absolutely essential that this grade plugin selector is shown after the user header. Just ask Fred.
879 $navselector = print_grade_plugin_selector($plugin_info, $active_type, $active_plugin, true);
881 $returnval .= $navselector;
882 } else if (!isset($user)) {
888 // Add a help dialogue box if provided.
889 if (isset($headerhelpidentifier)) {
890 $output = $OUTPUT->heading_with_help($heading, $headerhelpidentifier, $headerhelpcomponent);
893 $output = $OUTPUT->context_header(
895 'heading' => fullname($user),
897 'usercontext' => context_user::instance($user->id)
901 $output = $OUTPUT->heading($heading);
906 $returnval .= $output;
911 if ($courseid != SITEID &&
912 ($CFG->grade_navmethod == GRADE_NAVMETHOD_COMBO || $CFG->grade_navmethod == GRADE_NAVMETHOD_TABS)) {
913 $returnval .= grade_print_tabs($active_type, $active_plugin, $plugin_info, $return);
917 $returnval .= print_natural_aggregation_upgrade_notice($courseid,
918 context_course::instance($courseid),
928 * Utility class used for return tracking when using edit and other forms in grade plugins
930 * @package core_grades
931 * @copyright 2009 Nicolas Connault
932 * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
934 class grade_plugin_return {
944 * @param array $params - associative array with return parameters, if null parameter are taken from _GET or _POST
946 public function grade_plugin_return($params = null) {
947 if (empty($params)) {
948 $this->type = optional_param('gpr_type', null, PARAM_SAFEDIR);
949 $this->plugin = optional_param('gpr_plugin', null, PARAM_PLUGIN);
950 $this->courseid = optional_param('gpr_courseid', null, PARAM_INT);
951 $this->userid = optional_param('gpr_userid', null, PARAM_INT);
952 $this->page = optional_param('gpr_page', null, PARAM_INT);
955 foreach ($params as $key=>$value) {
956 if (property_exists($this, $key)) {
957 $this->$key = $value;
964 * Returns return parameters as options array suitable for buttons.
965 * @return array options
967 public function get_options() {
968 if (empty($this->type)) {
974 if (!empty($this->plugin)) {
975 $params['plugin'] = $this->plugin;
978 if (!empty($this->courseid)) {
979 $params['id'] = $this->courseid;
982 if (!empty($this->userid)) {
983 $params['userid'] = $this->userid;
986 if (!empty($this->page)) {
987 $params['page'] = $this->page;
996 * @param string $default default url when params not set
997 * @param array $extras Extra URL parameters
1001 public function get_return_url($default, $extras=null) {
1004 if (empty($this->type) or empty($this->plugin)) {
1008 $url = $CFG->wwwroot.'/grade/'.$this->type.'/'.$this->plugin.'/index.php';
1011 if (!empty($this->courseid)) {
1012 $url .= $glue.'id='.$this->courseid;
1016 if (!empty($this->userid)) {
1017 $url .= $glue.'userid='.$this->userid;
1021 if (!empty($this->page)) {
1022 $url .= $glue.'page='.$this->page;
1026 if (!empty($extras)) {
1027 foreach ($extras as $key=>$value) {
1028 $url .= $glue.$key.'='.$value;
1037 * Returns string with hidden return tracking form elements.
1040 public function get_form_fields() {
1041 if (empty($this->type)) {
1045 $result = '<input type="hidden" name="gpr_type" value="'.$this->type.'" />';
1047 if (!empty($this->plugin)) {
1048 $result .= '<input type="hidden" name="gpr_plugin" value="'.$this->plugin.'" />';
1051 if (!empty($this->courseid)) {
1052 $result .= '<input type="hidden" name="gpr_courseid" value="'.$this->courseid.'" />';
1055 if (!empty($this->userid)) {
1056 $result .= '<input type="hidden" name="gpr_userid" value="'.$this->userid.'" />';
1059 if (!empty($this->page)) {
1060 $result .= '<input type="hidden" name="gpr_page" value="'.$this->page.'" />';
1065 * Add hidden elements into mform
1067 * @param object &$mform moodle form object
1071 public function add_mform_elements(&$mform) {
1072 if (empty($this->type)) {
1076 $mform->addElement('hidden', 'gpr_type', $this->type);
1077 $mform->setType('gpr_type', PARAM_SAFEDIR);
1079 if (!empty($this->plugin)) {
1080 $mform->addElement('hidden', 'gpr_plugin', $this->plugin);
1081 $mform->setType('gpr_plugin', PARAM_PLUGIN);
1084 if (!empty($this->courseid)) {
1085 $mform->addElement('hidden', 'gpr_courseid', $this->courseid);
1086 $mform->setType('gpr_courseid', PARAM_INT);
1089 if (!empty($this->userid)) {
1090 $mform->addElement('hidden', 'gpr_userid', $this->userid);
1091 $mform->setType('gpr_userid', PARAM_INT);
1094 if (!empty($this->page)) {
1095 $mform->addElement('hidden', 'gpr_page', $this->page);
1096 $mform->setType('gpr_page', PARAM_INT);
1101 * Add return tracking params into url
1103 * @param moodle_url $url A URL
1105 * @return string $url with return tracking params
1107 public function add_url_params(moodle_url $url) {
1108 if (empty($this->type)) {
1112 $url->param('gpr_type', $this->type);
1114 if (!empty($this->plugin)) {
1115 $url->param('gpr_plugin', $this->plugin);
1118 if (!empty($this->courseid)) {
1119 $url->param('gpr_courseid' ,$this->courseid);
1122 if (!empty($this->userid)) {
1123 $url->param('gpr_userid', $this->userid);
1126 if (!empty($this->page)) {
1127 $url->param('gpr_page', $this->page);
1135 * Function central to gradebook for building and printing the navigation (breadcrumb trail).
1137 * @param string $path The path of the calling script (using __FILE__?)
1138 * @param string $pagename The language string to use as the last part of the navigation (non-link)
1139 * @param mixed $id Either a plain integer (assuming the key is 'id') or
1140 * an array of keys and values (e.g courseid => $courseid, itemid...)
1144 function grade_build_nav($path, $pagename=null, $id=null) {
1145 global $CFG, $COURSE, $PAGE;
1147 $strgrades = get_string('grades', 'grades');
1149 // Parse the path and build navlinks from its elements
1150 $dirroot_length = strlen($CFG->dirroot) + 1; // Add 1 for the first slash
1151 $path = substr($path, $dirroot_length);
1152 $path = str_replace('\\', '/', $path);
1154 $path_elements = explode('/', $path);
1156 $path_elements_count = count($path_elements);
1158 // First link is always 'grade'
1159 $PAGE->navbar->add($strgrades, new moodle_url('/grade/index.php', array('id'=>$COURSE->id)));
1162 $numberofelements = 3;
1164 // Prepare URL params string
1165 $linkparams = array();
1166 if (!is_null($id)) {
1167 if (is_array($id)) {
1168 foreach ($id as $idkey => $idvalue) {
1169 $linkparams[$idkey] = $idvalue;
1172 $linkparams['id'] = $id;
1178 // Remove file extensions from filenames
1179 foreach ($path_elements as $key => $filename) {
1180 $path_elements[$key] = str_replace('.php', '', $filename);
1183 // Second level links
1184 switch ($path_elements[1]) {
1185 case 'edit': // No link
1186 if ($path_elements[3] != 'index.php') {
1187 $numberofelements = 4;
1190 case 'import': // No link
1192 case 'export': // No link
1195 // $id is required for this link. Do not print it if $id isn't given
1196 if (!is_null($id)) {
1197 $link = new moodle_url('/grade/report/index.php', $linkparams);
1200 if ($path_elements[2] == 'grader') {
1201 $numberofelements = 4;
1206 // If this element isn't among the ones already listed above, it isn't supported, throw an error.
1207 debugging("grade_build_nav() doesn't support ". $path_elements[1] .
1208 " as the second path element after 'grade'.");
1211 $PAGE->navbar->add(get_string($path_elements[1], 'grades'), $link);
1213 // Third level links
1214 if (empty($pagename)) {
1215 $pagename = get_string($path_elements[2], 'grades');
1218 switch ($numberofelements) {
1220 $PAGE->navbar->add($pagename, $link);
1223 if ($path_elements[2] == 'grader' AND $path_elements[3] != 'index.php') {
1224 $PAGE->navbar->add(get_string('pluginname', 'gradereport_grader'), new moodle_url('/grade/report/grader/index.php', $linkparams));
1226 $PAGE->navbar->add($pagename);
1234 * General structure representing grade items in course
1236 * @package core_grades
1237 * @copyright 2009 Nicolas Connault
1238 * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
1240 class grade_structure {
1246 * Reference to modinfo for current course (for performance, to save
1247 * retrieving it from courseid every time). Not actually set except for
1248 * the grade_tree type.
1249 * @var course_modinfo
1254 * 1D array of grade items only
1259 * Returns icon of element
1261 * @param array &$element An array representing an element in the grade_tree
1262 * @param bool $spacerifnone return spacer if no icon found
1264 * @return string icon or spacer
1266 public function get_element_icon(&$element, $spacerifnone=false) {
1267 global $CFG, $OUTPUT;
1268 require_once $CFG->libdir.'/filelib.php';
1272 // Object holding pix_icon information before instantiation.
1273 $icon = new stdClass();
1274 $icon->attributes = array(
1275 'class' => 'item itemicon'
1277 $icon->component = 'moodle';
1280 switch ($element['type']) {
1283 case 'categoryitem':
1286 $is_course = $element['object']->is_course_item();
1287 $is_category = $element['object']->is_category_item();
1288 $is_scale = $element['object']->gradetype == GRADE_TYPE_SCALE;
1289 $is_value = $element['object']->gradetype == GRADE_TYPE_VALUE;
1290 $is_outcome = !empty($element['object']->outcomeid);
1292 if ($element['object']->is_calculated()) {
1293 $icon->pix = 'i/calc';
1294 $icon->title = s(get_string('calculatedgrade', 'grades'));
1296 } else if (($is_course or $is_category) and ($is_scale or $is_value)) {
1297 if ($category = $element['object']->get_item_category()) {
1298 $aggrstrings = grade_helper::get_aggregation_strings();
1299 $stragg = $aggrstrings[$category->aggregation];
1301 $icon->pix = 'i/calc';
1302 $icon->title = s($stragg);
1304 switch ($category->aggregation) {
1305 case GRADE_AGGREGATE_MEAN:
1306 case GRADE_AGGREGATE_MEDIAN:
1307 case GRADE_AGGREGATE_WEIGHTED_MEAN:
1308 case GRADE_AGGREGATE_WEIGHTED_MEAN2:
1309 case GRADE_AGGREGATE_EXTRACREDIT_MEAN:
1310 $icon->pix = 'i/agg_mean';
1312 case GRADE_AGGREGATE_SUM:
1313 $icon->pix = 'i/agg_sum';
1318 } else if ($element['object']->itemtype == 'mod') {
1319 // Prevent outcomes displaying the same icon as the activity they are attached to.
1321 $icon->pix = 'i/outcomes';
1322 $icon->title = s(get_string('outcome', 'grades'));
1324 $icon->pix = 'icon';
1325 $icon->component = $element['object']->itemmodule;
1326 $icon->title = s(get_string('modulename', $element['object']->itemmodule));
1328 } else if ($element['object']->itemtype == 'manual') {
1329 if ($element['object']->is_outcome_item()) {
1330 $icon->pix = 'i/outcomes';
1331 $icon->title = s(get_string('outcome', 'grades'));
1333 $icon->pix = 'i/manual_item';
1334 $icon->title = s(get_string('manualitem', 'grades'));
1341 $icon->pix = 'i/folder';
1342 $icon->title = s(get_string('category', 'grades'));
1347 if ($spacerifnone) {
1348 $outputstr = $OUTPUT->spacer() . ' ';
1351 $outputstr = $OUTPUT->pix_icon($icon->pix, $icon->title, $icon->component, $icon->attributes);
1358 * Returns name of element optionally with icon and link
1360 * @param array &$element An array representing an element in the grade_tree
1361 * @param bool $withlink Whether or not this header has a link
1362 * @param bool $icon Whether or not to display an icon with this header
1363 * @param bool $spacerifnone return spacer if no icon found
1364 * @param bool $withdescription Show description if defined by this item.
1365 * @param bool $fulltotal If the item is a category total, returns $categoryname."total"
1366 * instead of "Category total" or "Course total"
1368 * @return string header
1370 public function get_element_header(&$element, $withlink = false, $icon = true, $spacerifnone = false,
1371 $withdescription = false, $fulltotal = false) {
1375 $header .= $this->get_element_icon($element, $spacerifnone);
1378 $header .= $element['object']->get_name($fulltotal);
1380 if ($element['type'] != 'item' and $element['type'] != 'categoryitem' and
1381 $element['type'] != 'courseitem') {
1385 if ($withlink && $url = $this->get_activity_link($element)) {
1386 $a = new stdClass();
1387 $a->name = get_string('modulename', $element['object']->itemmodule);
1388 $title = get_string('linktoactivity', 'grades', $a);
1390 $header = html_writer::link($url, $header, array('title' => $title));
1392 $header = html_writer::span($header);
1395 if ($withdescription) {
1396 $desc = $element['object']->get_description();
1397 if (!empty($desc)) {
1398 $header .= '<div class="gradeitemdescription">' . s($desc) . '</div><div class="gradeitemdescriptionfiller"></div>';
1405 private function get_activity_link($element) {
1407 /** @var array static cache of the grade.php file existence flags */
1408 static $hasgradephp = array();
1410 $itemtype = $element['object']->itemtype;
1411 $itemmodule = $element['object']->itemmodule;
1412 $iteminstance = $element['object']->iteminstance;
1413 $itemnumber = $element['object']->itemnumber;
1415 // Links only for module items that have valid instance, module and are
1416 // called from grade_tree with valid modinfo
1417 if ($itemtype != 'mod' || !$iteminstance || !$itemmodule || !$this->modinfo) {
1421 // Get $cm efficiently and with visibility information using modinfo
1422 $instances = $this->modinfo->get_instances();
1423 if (empty($instances[$itemmodule][$iteminstance])) {
1426 $cm = $instances[$itemmodule][$iteminstance];
1428 // Do not add link if activity is not visible to the current user
1429 if (!$cm->uservisible) {
1433 if (!array_key_exists($itemmodule, $hasgradephp)) {
1434 if (file_exists($CFG->dirroot . '/mod/' . $itemmodule . '/grade.php')) {
1435 $hasgradephp[$itemmodule] = true;
1437 $hasgradephp[$itemmodule] = false;
1441 // If module has grade.php, link to that, otherwise view.php
1442 if ($hasgradephp[$itemmodule]) {
1443 $args = array('id' => $cm->id, 'itemnumber' => $itemnumber);
1444 if (isset($element['userid'])) {
1445 $args['userid'] = $element['userid'];
1447 return new moodle_url('/mod/' . $itemmodule . '/grade.php', $args);
1449 return new moodle_url('/mod/' . $itemmodule . '/view.php', array('id' => $cm->id));
1454 * Returns URL of a page that is supposed to contain detailed grade analysis
1456 * At the moment, only activity modules are supported. The method generates link
1457 * to the module's file grade.php with the parameters id (cmid), itemid, itemnumber,
1458 * gradeid and userid. If the grade.php does not exist, null is returned.
1460 * @return moodle_url|null URL or null if unable to construct it
1462 public function get_grade_analysis_url(grade_grade $grade) {
1464 /** @var array static cache of the grade.php file existence flags */
1465 static $hasgradephp = array();
1467 if (empty($grade->grade_item) or !($grade->grade_item instanceof grade_item)) {
1468 throw new coding_exception('Passed grade without the associated grade item');
1470 $item = $grade->grade_item;
1472 if (!$item->is_external_item()) {
1473 // at the moment, only activity modules are supported
1476 if ($item->itemtype !== 'mod') {
1477 throw new coding_exception('Unknown external itemtype: '.$item->itemtype);
1479 if (empty($item->iteminstance) or empty($item->itemmodule) or empty($this->modinfo)) {
1483 if (!array_key_exists($item->itemmodule, $hasgradephp)) {
1484 if (file_exists($CFG->dirroot . '/mod/' . $item->itemmodule . '/grade.php')) {
1485 $hasgradephp[$item->itemmodule] = true;
1487 $hasgradephp[$item->itemmodule] = false;
1491 if (!$hasgradephp[$item->itemmodule]) {
1495 $instances = $this->modinfo->get_instances();
1496 if (empty($instances[$item->itemmodule][$item->iteminstance])) {
1499 $cm = $instances[$item->itemmodule][$item->iteminstance];
1500 if (!$cm->uservisible) {
1504 $url = new moodle_url('/mod/'.$item->itemmodule.'/grade.php', array(
1506 'itemid' => $item->id,
1507 'itemnumber' => $item->itemnumber,
1508 'gradeid' => $grade->id,
1509 'userid' => $grade->userid,
1516 * Returns an action icon leading to the grade analysis page
1518 * @param grade_grade $grade
1521 public function get_grade_analysis_icon(grade_grade $grade) {
1524 $url = $this->get_grade_analysis_url($grade);
1525 if (is_null($url)) {
1529 return $OUTPUT->action_icon($url, new pix_icon('t/preview',
1530 get_string('gradeanalysis', 'core_grades')));
1534 * Returns the grade eid - the grade may not exist yet.
1536 * @param grade_grade $grade_grade A grade_grade object
1538 * @return string eid
1540 public function get_grade_eid($grade_grade) {
1541 if (empty($grade_grade->id)) {
1542 return 'n'.$grade_grade->itemid.'u'.$grade_grade->userid;
1544 return 'g'.$grade_grade->id;
1549 * Returns the grade_item eid
1550 * @param grade_item $grade_item A grade_item object
1551 * @return string eid
1553 public function get_item_eid($grade_item) {
1554 return 'ig'.$grade_item->id;
1558 * Given a grade_tree element, returns an array of parameters
1559 * used to build an icon for that element.
1561 * @param array $element An array representing an element in the grade_tree
1565 public function get_params_for_iconstr($element) {
1566 $strparams = new stdClass();
1567 $strparams->category = '';
1568 $strparams->itemname = '';
1569 $strparams->itemmodule = '';
1571 if (!method_exists($element['object'], 'get_name')) {
1575 $strparams->itemname = html_to_text($element['object']->get_name());
1577 // If element name is categorytotal, get the name of the parent category
1578 if ($strparams->itemname == get_string('categorytotal', 'grades')) {
1579 $parent = $element['object']->get_parent_category();
1580 $strparams->category = $parent->get_name() . ' ';
1582 $strparams->category = '';
1585 $strparams->itemmodule = null;
1586 if (isset($element['object']->itemmodule)) {
1587 $strparams->itemmodule = $element['object']->itemmodule;
1593 * Return a reset icon for the given element.
1595 * @param array $element An array representing an element in the grade_tree
1596 * @param object $gpr A grade_plugin_return object
1597 * @param bool $returnactionmenulink return the instance of action_menu_link instead of string
1598 * @return string|action_menu_link
1600 public function get_reset_icon($element, $gpr, $returnactionmenulink = false) {
1601 global $CFG, $OUTPUT;
1603 // Limit to category items set to use the natural weights aggregation method, and users
1604 // with the capability to manage grades.
1605 if ($element['type'] != 'category' || $element['object']->aggregation != GRADE_AGGREGATE_SUM ||
1606 !has_capability('moodle/grade:manage', $this->context)) {
1607 return $returnactionmenulink ? null : '';
1610 $str = get_string('resetweights', 'grades', $this->get_params_for_iconstr($element));
1611 $url = new moodle_url('/grade/edit/tree/action.php', array(
1612 'id' => $this->courseid,
1613 'action' => 'resetweights',
1614 'eid' => $element['eid'],
1615 'sesskey' => sesskey(),
1618 if ($returnactionmenulink) {
1619 return new action_menu_link_secondary($gpr->add_url_params($url), new pix_icon('t/reset', $str),
1620 get_string('resetweightsshort', 'grades'));
1622 return $OUTPUT->action_icon($gpr->add_url_params($url), new pix_icon('t/reset', $str));
1627 * Return edit icon for give element
1629 * @param array $element An array representing an element in the grade_tree
1630 * @param object $gpr A grade_plugin_return object
1631 * @param bool $returnactionmenulink return the instance of action_menu_link instead of string
1632 * @return string|action_menu_link
1634 public function get_edit_icon($element, $gpr, $returnactionmenulink = false) {
1635 global $CFG, $OUTPUT;
1637 if (!has_capability('moodle/grade:manage', $this->context)) {
1638 if ($element['type'] == 'grade' and has_capability('moodle/grade:edit', $this->context)) {
1639 // oki - let them override grade
1641 return $returnactionmenulink ? null : '';
1645 static $strfeedback = null;
1646 static $streditgrade = null;
1647 if (is_null($streditgrade)) {
1648 $streditgrade = get_string('editgrade', 'grades');
1649 $strfeedback = get_string('feedback');
1652 $strparams = $this->get_params_for_iconstr($element);
1654 $object = $element['object'];
1656 switch ($element['type']) {
1658 case 'categoryitem':
1660 $stredit = get_string('editverbose', 'grades', $strparams);
1661 if (empty($object->outcomeid) || empty($CFG->enableoutcomes)) {
1662 $url = new moodle_url('/grade/edit/tree/item.php',
1663 array('courseid' => $this->courseid, 'id' => $object->id));
1665 $url = new moodle_url('/grade/edit/tree/outcomeitem.php',
1666 array('courseid' => $this->courseid, 'id' => $object->id));
1671 $stredit = get_string('editverbose', 'grades', $strparams);
1672 $url = new moodle_url('/grade/edit/tree/category.php',
1673 array('courseid' => $this->courseid, 'id' => $object->id));
1677 $stredit = $streditgrade;
1678 if (empty($object->id)) {
1679 $url = new moodle_url('/grade/edit/tree/grade.php',
1680 array('courseid' => $this->courseid, 'itemid' => $object->itemid, 'userid' => $object->userid));
1682 $url = new moodle_url('/grade/edit/tree/grade.php',
1683 array('courseid' => $this->courseid, 'id' => $object->id));
1685 if (!empty($object->feedback)) {
1686 $feedback = addslashes_js(trim(format_string($object->feedback, $object->feedbackformat)));
1695 if ($returnactionmenulink) {
1696 return new action_menu_link_secondary($gpr->add_url_params($url),
1697 new pix_icon('t/edit', $stredit),
1698 get_string('editsettings'));
1700 return $OUTPUT->action_icon($gpr->add_url_params($url), new pix_icon('t/edit', $stredit));
1704 return $returnactionmenulink ? null : '';
1709 * Return hiding icon for give element
1711 * @param array $element An array representing an element in the grade_tree
1712 * @param object $gpr A grade_plugin_return object
1713 * @param bool $returnactionmenulink return the instance of action_menu_link instead of string
1714 * @return string|action_menu_link
1716 public function get_hiding_icon($element, $gpr, $returnactionmenulink = false) {
1717 global $CFG, $OUTPUT;
1719 if (!$element['object']->can_control_visibility()) {
1720 return $returnactionmenulink ? null : '';
1723 if (!has_capability('moodle/grade:manage', $this->context) and
1724 !has_capability('moodle/grade:hide', $this->context)) {
1725 return $returnactionmenulink ? null : '';
1728 $strparams = $this->get_params_for_iconstr($element);
1729 $strshow = get_string('showverbose', 'grades', $strparams);
1730 $strhide = get_string('hideverbose', 'grades', $strparams);
1732 $url = new moodle_url('/grade/edit/tree/action.php', array('id' => $this->courseid, 'sesskey' => sesskey(), 'eid' => $element['eid']));
1733 $url = $gpr->add_url_params($url);
1735 if ($element['object']->is_hidden()) {
1737 $tooltip = $strshow;
1739 // Change the icon and add a tooltip showing the date
1740 if ($element['type'] != 'category' and $element['object']->get_hidden() > 1) {
1741 $type = 'hiddenuntil';
1742 $tooltip = get_string('hiddenuntildate', 'grades',
1743 userdate($element['object']->get_hidden()));
1746 $url->param('action', 'show');
1748 if ($returnactionmenulink) {
1749 $hideicon = new action_menu_link_secondary($url, new pix_icon('t/'.$type, $tooltip), get_string('show'));
1751 $hideicon = $OUTPUT->action_icon($url, new pix_icon('t/'.$type, $tooltip, 'moodle', array('alt'=>$strshow, 'class'=>'smallicon')));
1755 $url->param('action', 'hide');
1756 if ($returnactionmenulink) {
1757 $hideicon = new action_menu_link_secondary($url, new pix_icon('t/hide', $strhide), get_string('hide'));
1759 $hideicon = $OUTPUT->action_icon($url, new pix_icon('t/hide', $strhide));
1767 * Return locking icon for given element
1769 * @param array $element An array representing an element in the grade_tree
1770 * @param object $gpr A grade_plugin_return object
1774 public function get_locking_icon($element, $gpr) {
1775 global $CFG, $OUTPUT;
1777 $strparams = $this->get_params_for_iconstr($element);
1778 $strunlock = get_string('unlockverbose', 'grades', $strparams);
1779 $strlock = get_string('lockverbose', 'grades', $strparams);
1781 $url = new moodle_url('/grade/edit/tree/action.php', array('id' => $this->courseid, 'sesskey' => sesskey(), 'eid' => $element['eid']));
1782 $url = $gpr->add_url_params($url);
1784 // Don't allow an unlocking action for a grade whose grade item is locked: just print a state icon
1785 if ($element['type'] == 'grade' && $element['object']->grade_item->is_locked()) {
1786 $strparamobj = new stdClass();
1787 $strparamobj->itemname = $element['object']->grade_item->itemname;
1788 $strnonunlockable = get_string('nonunlockableverbose', 'grades', $strparamobj);
1790 $action = html_writer::tag('span', $OUTPUT->pix_icon('t/locked', $strnonunlockable),
1791 array('class' => 'action-icon'));
1793 } else if ($element['object']->is_locked()) {
1795 $tooltip = $strunlock;
1797 // Change the icon and add a tooltip showing the date
1798 if ($element['type'] != 'category' and $element['object']->get_locktime() > 1) {
1800 $tooltip = get_string('locktimedate', 'grades',
1801 userdate($element['object']->get_locktime()));
1804 if (!has_capability('moodle/grade:manage', $this->context) and !has_capability('moodle/grade:unlock', $this->context)) {
1807 $url->param('action', 'unlock');
1808 $action = $OUTPUT->action_icon($url, new pix_icon('t/'.$type, $tooltip, 'moodle', array('alt'=>$strunlock, 'class'=>'smallicon')));
1812 if (!has_capability('moodle/grade:manage', $this->context) and !has_capability('moodle/grade:lock', $this->context)) {
1815 $url->param('action', 'lock');
1816 $action = $OUTPUT->action_icon($url, new pix_icon('t/lock', $strlock));
1824 * Return calculation icon for given element
1826 * @param array $element An array representing an element in the grade_tree
1827 * @param object $gpr A grade_plugin_return object
1828 * @param bool $returnactionmenulink return the instance of action_menu_link instead of string
1829 * @return string|action_menu_link
1831 public function get_calculation_icon($element, $gpr, $returnactionmenulink = false) {
1832 global $CFG, $OUTPUT;
1833 if (!has_capability('moodle/grade:manage', $this->context)) {
1834 return $returnactionmenulink ? null : '';
1837 $type = $element['type'];
1838 $object = $element['object'];
1840 if ($type == 'item' or $type == 'courseitem' or $type == 'categoryitem') {
1841 $strparams = $this->get_params_for_iconstr($element);
1842 $streditcalculation = get_string('editcalculationverbose', 'grades', $strparams);
1844 $is_scale = $object->gradetype == GRADE_TYPE_SCALE;
1845 $is_value = $object->gradetype == GRADE_TYPE_VALUE;
1847 // show calculation icon only when calculation possible
1848 if (!$object->is_external_item() and ($is_scale or $is_value)) {
1849 if ($object->is_calculated()) {
1852 $icon = 't/calc_off';
1855 $url = new moodle_url('/grade/edit/tree/calculation.php', array('courseid' => $this->courseid, 'id' => $object->id));
1856 $url = $gpr->add_url_params($url);
1857 if ($returnactionmenulink) {
1858 return new action_menu_link_secondary($url,
1859 new pix_icon($icon, $streditcalculation),
1860 get_string('editcalculation', 'grades'));
1862 return $OUTPUT->action_icon($url, new pix_icon($icon, $streditcalculation));
1867 return $returnactionmenulink ? null : '';
1872 * Flat structure similar to grade tree.
1874 * @uses grade_structure
1875 * @package core_grades
1876 * @copyright 2009 Nicolas Connault
1877 * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
1879 class grade_seq extends grade_structure {
1882 * 1D array of elements
1887 * Constructor, retrieves and stores array of all grade_category and grade_item
1888 * objects for the given courseid. Full objects are instantiated. Ordering sequence is fixed if needed.
1890 * @param int $courseid The course id
1891 * @param bool $category_grade_last category grade item is the last child
1892 * @param bool $nooutcomes Whether or not outcomes should be included
1894 public function grade_seq($courseid, $category_grade_last=false, $nooutcomes=false) {
1897 $this->courseid = $courseid;
1898 $this->context = context_course::instance($courseid);
1900 // get course grade tree
1901 $top_element = grade_category::fetch_course_tree($courseid, true);
1903 $this->elements = grade_seq::flatten($top_element, $category_grade_last, $nooutcomes);
1905 foreach ($this->elements as $key=>$unused) {
1906 $this->items[$this->elements[$key]['object']->id] =& $this->elements[$key]['object'];
1911 * Static recursive helper - makes the grade_item for category the last children
1913 * @param array &$element The seed of the recursion
1914 * @param bool $category_grade_last category grade item is the last child
1915 * @param bool $nooutcomes Whether or not outcomes should be included
1919 public function flatten(&$element, $category_grade_last, $nooutcomes) {
1920 if (empty($element['children'])) {
1923 $children = array();
1925 foreach ($element['children'] as $sortorder=>$unused) {
1926 if ($nooutcomes and $element['type'] != 'category' and
1927 $element['children'][$sortorder]['object']->is_outcome_item()) {
1930 $children[] = $element['children'][$sortorder];
1932 unset($element['children']);
1934 if ($category_grade_last and count($children) > 1) {
1935 $cat_item = array_shift($children);
1936 array_push($children, $cat_item);
1940 foreach ($children as $child) {
1941 if ($child['type'] == 'category') {
1942 $result = $result + grade_seq::flatten($child, $category_grade_last, $nooutcomes);
1944 $child['eid'] = 'i'.$child['object']->id;
1945 $result[$child['object']->id] = $child;
1953 * Parses the array in search of a given eid and returns a element object with
1954 * information about the element it has found.
1956 * @param int $eid Gradetree Element ID
1958 * @return object element
1960 public function locate_element($eid) {
1961 // it is a grade - construct a new object
1962 if (strpos($eid, 'n') === 0) {
1963 if (!preg_match('/n(\d+)u(\d+)/', $eid, $matches)) {
1967 $itemid = $matches[1];
1968 $userid = $matches[2];
1970 //extra security check - the grade item must be in this tree
1971 if (!$item_el = $this->locate_element('ig'.$itemid)) {
1975 // $gradea->id may be null - means does not exist yet
1976 $grade = new grade_grade(array('itemid'=>$itemid, 'userid'=>$userid));
1978 $grade->grade_item =& $item_el['object']; // this may speedup grade_grade methods!
1979 return array('eid'=>'n'.$itemid.'u'.$userid,'object'=>$grade, 'type'=>'grade');
1981 } else if (strpos($eid, 'g') === 0) {
1982 $id = (int) substr($eid, 1);
1983 if (!$grade = grade_grade::fetch(array('id'=>$id))) {
1986 //extra security check - the grade item must be in this tree
1987 if (!$item_el = $this->locate_element('ig'.$grade->itemid)) {
1990 $grade->grade_item =& $item_el['object']; // this may speedup grade_grade methods!
1991 return array('eid'=>'g'.$id,'object'=>$grade, 'type'=>'grade');
1994 // it is a category or item
1995 foreach ($this->elements as $element) {
1996 if ($element['eid'] == $eid) {
2006 * This class represents a complete tree of categories, grade_items and final grades,
2007 * organises as an array primarily, but which can also be converted to other formats.
2008 * It has simple method calls with complex implementations, allowing for easy insertion,
2009 * deletion and moving of items and categories within the tree.
2011 * @uses grade_structure
2012 * @package core_grades
2013 * @copyright 2009 Nicolas Connault
2014 * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
2016 class grade_tree extends grade_structure {
2019 * The basic representation of the tree as a hierarchical, 3-tiered array.
2020 * @var object $top_element
2022 public $top_element;
2025 * 2D array of grade items and categories
2026 * @var array $levels
2037 * Constructor, retrieves and stores a hierarchical array of all grade_category and grade_item
2038 * objects for the given courseid. Full objects are instantiated. Ordering sequence is fixed if needed.
2040 * @param int $courseid The Course ID
2041 * @param bool $fillers include fillers and colspans, make the levels var "rectangular"
2042 * @param bool $category_grade_last category grade item is the last child
2043 * @param array $collapsed array of collapsed categories
2044 * @param bool $nooutcomes Whether or not outcomes should be included
2046 public function grade_tree($courseid, $fillers=true, $category_grade_last=false,
2047 $collapsed=null, $nooutcomes=false) {
2048 global $USER, $CFG, $COURSE, $DB;
2050 $this->courseid = $courseid;
2051 $this->levels = array();
2052 $this->context = context_course::instance($courseid);
2054 if (!empty($COURSE->id) && $COURSE->id == $this->courseid) {
2057 $course = $DB->get_record('course', array('id' => $this->courseid));
2059 $this->modinfo = get_fast_modinfo($course);
2061 // get course grade tree
2062 $this->top_element = grade_category::fetch_course_tree($courseid, true);
2064 // collapse the categories if requested
2065 if (!empty($collapsed)) {
2066 grade_tree::category_collapse($this->top_element, $collapsed);
2069 // no otucomes if requested
2070 if (!empty($nooutcomes)) {
2071 grade_tree::no_outcomes($this->top_element);
2074 // move category item to last position in category
2075 if ($category_grade_last) {
2076 grade_tree::category_grade_last($this->top_element);
2080 // inject fake categories == fillers
2081 grade_tree::inject_fillers($this->top_element, 0);
2082 // add colspans to categories and fillers
2083 grade_tree::inject_colspans($this->top_element);
2086 grade_tree::fill_levels($this->levels, $this->top_element, 0);
2091 * Static recursive helper - removes items from collapsed categories
2093 * @param array &$element The seed of the recursion
2094 * @param array $collapsed array of collapsed categories
2098 public function category_collapse(&$element, $collapsed) {
2099 if ($element['type'] != 'category') {
2102 if (empty($element['children']) or count($element['children']) < 2) {
2106 if (in_array($element['object']->id, $collapsed['aggregatesonly'])) {
2107 $category_item = reset($element['children']); //keep only category item
2108 $element['children'] = array(key($element['children'])=>$category_item);
2111 if (in_array($element['object']->id, $collapsed['gradesonly'])) { // Remove category item
2112 reset($element['children']);
2113 $first_key = key($element['children']);
2114 unset($element['children'][$first_key]);
2116 foreach ($element['children'] as $sortorder=>$child) { // Recurse through the element's children
2117 grade_tree::category_collapse($element['children'][$sortorder], $collapsed);
2123 * Static recursive helper - removes all outcomes
2125 * @param array &$element The seed of the recursion
2129 public function no_outcomes(&$element) {
2130 if ($element['type'] != 'category') {
2133 foreach ($element['children'] as $sortorder=>$child) {
2134 if ($element['children'][$sortorder]['type'] == 'item'
2135 and $element['children'][$sortorder]['object']->is_outcome_item()) {
2136 unset($element['children'][$sortorder]);
2138 } else if ($element['children'][$sortorder]['type'] == 'category') {
2139 grade_tree::no_outcomes($element['children'][$sortorder]);
2145 * Static recursive helper - makes the grade_item for category the last children
2147 * @param array &$element The seed of the recursion
2151 public function category_grade_last(&$element) {
2152 if (empty($element['children'])) {
2155 if (count($element['children']) < 2) {
2158 $first_item = reset($element['children']);
2159 if ($first_item['type'] == 'categoryitem' or $first_item['type'] == 'courseitem') {
2160 // the category item might have been already removed
2161 $order = key($element['children']);
2162 unset($element['children'][$order]);
2163 $element['children'][$order] =& $first_item;
2165 foreach ($element['children'] as $sortorder => $child) {
2166 grade_tree::category_grade_last($element['children'][$sortorder]);
2171 * Static recursive helper - fills the levels array, useful when accessing tree elements of one level
2173 * @param array &$levels The levels of the grade tree through which to recurse
2174 * @param array &$element The seed of the recursion
2175 * @param int $depth How deep are we?
2178 public function fill_levels(&$levels, &$element, $depth) {
2179 if (!array_key_exists($depth, $levels)) {
2180 $levels[$depth] = array();
2183 // prepare unique identifier
2184 if ($element['type'] == 'category') {
2185 $element['eid'] = 'cg'.$element['object']->id;
2186 } else if (in_array($element['type'], array('item', 'courseitem', 'categoryitem'))) {
2187 $element['eid'] = 'ig'.$element['object']->id;
2188 $this->items[$element['object']->id] =& $element['object'];
2191 $levels[$depth][] =& $element;
2193 if (empty($element['children'])) {
2197 foreach ($element['children'] as $sortorder=>$child) {
2198 grade_tree::fill_levels($levels, $element['children'][$sortorder], $depth);
2199 $element['children'][$sortorder]['prev'] = $prev;
2200 $element['children'][$sortorder]['next'] = 0;
2202 $element['children'][$prev]['next'] = $sortorder;
2209 * Static recursive helper - makes full tree (all leafes are at the same level)
2211 * @param array &$element The seed of the recursion
2212 * @param int $depth How deep are we?
2216 public function inject_fillers(&$element, $depth) {
2219 if (empty($element['children'])) {
2222 $chdepths = array();
2223 $chids = array_keys($element['children']);
2224 $last_child = end($chids);
2225 $first_child = reset($chids);
2227 foreach ($chids as $chid) {
2228 $chdepths[$chid] = grade_tree::inject_fillers($element['children'][$chid], $depth);
2232 $maxdepth = reset($chdepths);
2233 foreach ($chdepths as $chid=>$chd) {
2234 if ($chd == $maxdepth) {
2237 for ($i=0; $i < $maxdepth-$chd; $i++) {
2238 if ($chid == $first_child) {
2239 $type = 'fillerfirst';
2240 } else if ($chid == $last_child) {
2241 $type = 'fillerlast';
2245 $oldchild =& $element['children'][$chid];
2246 $element['children'][$chid] = array('object'=>'filler', 'type'=>$type,
2247 'eid'=>'', 'depth'=>$element['object']->depth,
2248 'children'=>array($oldchild));
2256 * Static recursive helper - add colspan information into categories
2258 * @param array &$element The seed of the recursion
2262 public function inject_colspans(&$element) {
2263 if (empty($element['children'])) {
2267 foreach ($element['children'] as $key=>$child) {
2268 $count += grade_tree::inject_colspans($element['children'][$key]);
2270 $element['colspan'] = $count;
2275 * Parses the array in search of a given eid and returns a element object with
2276 * information about the element it has found.
2277 * @param int $eid Gradetree Element ID
2278 * @return object element
2280 public function locate_element($eid) {
2281 // it is a grade - construct a new object
2282 if (strpos($eid, 'n') === 0) {
2283 if (!preg_match('/n(\d+)u(\d+)/', $eid, $matches)) {
2287 $itemid = $matches[1];
2288 $userid = $matches[2];
2290 //extra security check - the grade item must be in this tree
2291 if (!$item_el = $this->locate_element('ig'.$itemid)) {
2295 // $gradea->id may be null - means does not exist yet
2296 $grade = new grade_grade(array('itemid'=>$itemid, 'userid'=>$userid));
2298 $grade->grade_item =& $item_el['object']; // this may speedup grade_grade methods!
2299 return array('eid'=>'n'.$itemid.'u'.$userid,'object'=>$grade, 'type'=>'grade');
2301 } else if (strpos($eid, 'g') === 0) {
2302 $id = (int) substr($eid, 1);
2303 if (!$grade = grade_grade::fetch(array('id'=>$id))) {
2306 //extra security check - the grade item must be in this tree
2307 if (!$item_el = $this->locate_element('ig'.$grade->itemid)) {
2310 $grade->grade_item =& $item_el['object']; // this may speedup grade_grade methods!
2311 return array('eid'=>'g'.$id,'object'=>$grade, 'type'=>'grade');
2314 // it is a category or item
2315 foreach ($this->levels as $row) {
2316 foreach ($row as $element) {
2317 if ($element['type'] == 'filler') {
2320 if ($element['eid'] == $eid) {
2330 * Returns a well-formed XML representation of the grade-tree using recursion.
2332 * @param array $root The current element in the recursion. If null, starts at the top of the tree.
2333 * @param string $tabs The control character to use for tabs
2335 * @return string $xml
2337 public function exporttoxml($root=null, $tabs="\t") {
2340 if (is_null($root)) {
2341 $root = $this->top_element;
2342 $xml = '<?xml version="1.0" encoding="UTF-8" ?>' . "\n";
2343 $xml .= "<gradetree>\n";
2347 $type = 'undefined';
2348 if (strpos($root['object']->table, 'grade_categories') !== false) {
2350 } else if (strpos($root['object']->table, 'grade_items') !== false) {
2352 } else if (strpos($root['object']->table, 'grade_outcomes') !== false) {
2356 $xml .= "$tabs<element type=\"$type\">\n";
2357 foreach ($root['object'] as $var => $value) {
2358 if (!is_object($value) && !is_array($value) && !empty($value)) {
2359 $xml .= "$tabs\t<$var>$value</$var>\n";
2363 if (!empty($root['children'])) {
2364 $xml .= "$tabs\t<children>\n";
2365 foreach ($root['children'] as $sortorder => $child) {
2366 $xml .= $this->exportToXML($child, $tabs."\t\t");
2368 $xml .= "$tabs\t</children>\n";
2371 $xml .= "$tabs</element>\n";
2374 $xml .= "</gradetree>";
2381 * Returns a JSON representation of the grade-tree using recursion.
2383 * @param array $root The current element in the recursion. If null, starts at the top of the tree.
2384 * @param string $tabs Tab characters used to indent the string nicely for humans to enjoy
2388 public function exporttojson($root=null, $tabs="\t") {
2391 if (is_null($root)) {
2392 $root = $this->top_element;
2399 if (strpos($root['object']->table, 'grade_categories') !== false) {
2400 $name = $root['object']->fullname;
2402 $name = $root['object']->get_name();
2404 } else if (strpos($root['object']->table, 'grade_items') !== false) {
2405 $name = $root['object']->itemname;
2406 } else if (strpos($root['object']->table, 'grade_outcomes') !== false) {
2407 $name = $root['object']->itemname;
2410 $json .= "$tabs {\n";
2411 $json .= "$tabs\t \"type\": \"{$root['type']}\",\n";
2412 $json .= "$tabs\t \"name\": \"$name\",\n";
2414 foreach ($root['object'] as $var => $value) {
2415 if (!is_object($value) && !is_array($value) && !empty($value)) {
2416 $json .= "$tabs\t \"$var\": \"$value\",\n";
2420 $json = substr($json, 0, strrpos($json, ','));
2422 if (!empty($root['children'])) {
2423 $json .= ",\n$tabs\t\"children\": [\n";
2424 foreach ($root['children'] as $sortorder => $child) {
2425 $json .= $this->exportToJSON($child, $tabs."\t\t");
2427 $json = substr($json, 0, strrpos($json, ','));
2428 $json .= "\n$tabs\t]\n";
2434 $json .= "\n$tabs},\n";
2441 * Returns the array of levels
2445 public function get_levels() {
2446 return $this->levels;
2450 * Returns the array of grade items
2454 public function get_items() {
2455 return $this->items;
2459 * Returns a specific Grade Item
2461 * @param int $itemid The ID of the grade_item object
2463 * @return grade_item
2465 public function get_item($itemid) {
2466 if (array_key_exists($itemid, $this->items)) {
2467 return $this->items[$itemid];
2475 * Local shortcut function for creating an edit/delete button for a grade_* object.
2476 * @param string $type 'edit' or 'delete'
2477 * @param int $courseid The Course ID
2478 * @param grade_* $object The grade_* object
2479 * @return string html
2481 function grade_button($type, $courseid, $object) {
2482 global $CFG, $OUTPUT;
2483 if (preg_match('/grade_(.*)/', get_class($object), $matches)) {
2484 $objectidstring = $matches[1] . 'id';
2486 throw new coding_exception('grade_button() only accepts grade_* objects as third parameter!');
2489 $strdelete = get_string('delete');
2490 $stredit = get_string('edit');
2492 if ($type == 'delete') {
2493 $url = new moodle_url('index.php', array('id' => $courseid, $objectidstring => $object->id, 'action' => 'delete', 'sesskey' => sesskey()));
2494 } else if ($type == 'edit') {
2495 $url = new moodle_url('edit.php', array('courseid' => $courseid, 'id' => $object->id));
2498 return $OUTPUT->action_icon($url, new pix_icon('t/'.$type, ${'str'.$type}, '', array('class' => 'iconsmall')));
2503 * This method adds settings to the settings block for the grade system and its
2506 * @global moodle_page $PAGE
2508 function grade_extend_settings($plugininfo, $courseid) {
2511 $gradenode = $PAGE->settingsnav->prepend(get_string('gradeadministration', 'grades'), null, navigation_node::TYPE_CONTAINER);
2513 $strings = array_shift($plugininfo);
2515 if ($reports = grade_helper::get_plugins_reports($courseid)) {
2516 foreach ($reports as $report) {
2517 $gradenode->add($report->string, $report->link, navigation_node::TYPE_SETTING, null, $report->id, new pix_icon('i/report', ''));
2521 if ($settings = grade_helper::get_info_manage_settings($courseid)) {
2522 $settingsnode = $gradenode->add($strings['settings'], null, navigation_node::TYPE_CONTAINER);
2523 foreach ($settings as $setting) {
2524 $settingsnode->add($setting->string, $setting->link, navigation_node::TYPE_SETTING, null, $setting->id, new pix_icon('i/settings', ''));
2528 if ($imports = grade_helper::get_plugins_import($courseid)) {
2529 $importnode = $gradenode->add($strings['import'], null, navigation_node::TYPE_CONTAINER);
2530 foreach ($imports as $import) {
2531 $importnode->add($import->string, $import->link, navigation_node::TYPE_SETTING, null, $import->id, new pix_icon('i/import', ''));
2535 if ($exports = grade_helper::get_plugins_export($courseid)) {
2536 $exportnode = $gradenode->add($strings['export'], null, navigation_node::TYPE_CONTAINER);
2537 foreach ($exports as $export) {
2538 $exportnode->add($export->string, $export->link, navigation_node::TYPE_SETTING, null, $export->id, new pix_icon('i/export', ''));
2542 if ($letters = grade_helper::get_info_letters($courseid)) {
2543 $letters = array_shift($letters);
2544 $gradenode->add($strings['letter'], $letters->link, navigation_node::TYPE_SETTING, null, $letters->id, new pix_icon('i/settings', ''));
2547 if ($outcomes = grade_helper::get_info_outcomes($courseid)) {
2548 $outcomes = array_shift($outcomes);
2549 $gradenode->add($strings['outcome'], $outcomes->link, navigation_node::TYPE_SETTING, null, $outcomes->id, new pix_icon('i/outcomes', ''));
2552 if ($scales = grade_helper::get_info_scales($courseid)) {
2553 $gradenode->add($strings['scale'], $scales->link, navigation_node::TYPE_SETTING, null, $scales->id, new pix_icon('i/scales', ''));
2556 if ($gradenode->contains_active_node()) {
2557 // If the gradenode is active include the settings base node (gradeadministration) in
2558 // the navbar, typcially this is ignored.
2559 $PAGE->navbar->includesettingsbase = true;
2561 // If we can get the course admin node make sure it is closed by default
2562 // as in this case the gradenode will be opened
2563 if ($coursenode = $PAGE->settingsnav->get('courseadmin', navigation_node::TYPE_COURSE)){
2564 $coursenode->make_inactive();
2565 $coursenode->forceopen = false;
2571 * Grade helper class
2573 * This class provides several helpful functions that work irrespective of any
2576 * @copyright 2010 Sam Hemelryk
2577 * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
2579 abstract class grade_helper {
2581 * Cached manage settings info {@see get_info_settings}
2582 * @var grade_plugin_info|false
2584 protected static $managesetting = null;
2586 * Cached grade report plugins {@see get_plugins_reports}
2589 protected static $gradereports = null;
2591 * Cached grade report plugins preferences {@see get_info_scales}
2594 protected static $gradereportpreferences = null;
2596 * Cached scale info {@see get_info_scales}
2597 * @var grade_plugin_info|false
2599 protected static $scaleinfo = null;
2601 * Cached outcome info {@see get_info_outcomes}
2602 * @var grade_plugin_info|false
2604 protected static $outcomeinfo = null;
2606 * Cached leftter info {@see get_info_letters}
2607 * @var grade_plugin_info|false
2609 protected static $letterinfo = null;
2611 * Cached grade import plugins {@see get_plugins_import}
2614 protected static $importplugins = null;
2616 * Cached grade export plugins {@see get_plugins_export}
2619 protected static $exportplugins = null;
2621 * Cached grade plugin strings
2624 protected static $pluginstrings = null;
2626 * Cached grade aggregation strings
2629 protected static $aggregationstrings = null;
2632 * Gets strings commonly used by the describe plugins
2634 * report => get_string('view'),
2635 * scale => get_string('scales'),
2636 * outcome => get_string('outcomes', 'grades'),
2637 * letter => get_string('letters', 'grades'),
2638 * export => get_string('export', 'grades'),
2639 * import => get_string('import'),
2640 * preferences => get_string('mypreferences', 'grades'),
2641 * settings => get_string('settings')
2645 public static function get_plugin_strings() {
2646 if (self::$pluginstrings === null) {
2647 self::$pluginstrings = array(
2648 'report' => get_string('view'),
2649 'scale' => get_string('scales'),
2650 'outcome' => get_string('outcomes', 'grades'),
2651 'letter' => get_string('letters', 'grades'),
2652 'export' => get_string('export', 'grades'),
2653 'import' => get_string('import'),
2654 'settings' => get_string('edittree', 'grades')
2657 return self::$pluginstrings;
2661 * Gets strings describing the available aggregation methods.
2665 public static function get_aggregation_strings() {
2666 if (self::$aggregationstrings === null) {
2667 self::$aggregationstrings = array(
2668 GRADE_AGGREGATE_MEAN => get_string('aggregatemean', 'grades'),
2669 GRADE_AGGREGATE_WEIGHTED_MEAN => get_string('aggregateweightedmean', 'grades'),
2670 GRADE_AGGREGATE_WEIGHTED_MEAN2 => get_string('aggregateweightedmean2', 'grades'),
2671 GRADE_AGGREGATE_EXTRACREDIT_MEAN => get_string('aggregateextracreditmean', 'grades'),
2672 GRADE_AGGREGATE_MEDIAN => get_string('aggregatemedian', 'grades'),
2673 GRADE_AGGREGATE_MIN => get_string('aggregatemin', 'grades'),
2674 GRADE_AGGREGATE_MAX => get_string('aggregatemax', 'grades'),
2675 GRADE_AGGREGATE_MODE => get_string('aggregatemode', 'grades'),
2676 GRADE_AGGREGATE_SUM => get_string('aggregatesum', 'grades')
2679 return self::$aggregationstrings;
2683 * Get grade_plugin_info object for managing settings if the user can
2685 * @param int $courseid
2686 * @return grade_plugin_info[]
2688 public static function get_info_manage_settings($courseid) {
2689 if (self::$managesetting !== null) {
2690 return self::$managesetting;
2692 $context = context_course::instance($courseid);
2693 self::$managesetting = array();
2694 if ($courseid != SITEID && has_capability('moodle/grade:manage', $context)) {
2695 self::$managesetting['categoriesanditems'] = new grade_plugin_info('setup',
2696 new moodle_url('/grade/edit/tree/index.php', array('id' => $courseid)),
2697 get_string('categoriesanditems', 'grades'));
2698 self::$managesetting['coursesettings'] = new grade_plugin_info('coursesettings',
2699 new moodle_url('/grade/edit/settings/index.php', array('id'=>$courseid)),
2700 get_string('coursegradesettings', 'grades'));
2702 if (self::$gradereportpreferences === null) {
2703 self::get_plugins_reports($courseid);
2705 if (self::$gradereportpreferences) {
2706 self::$managesetting = array_merge(self::$managesetting, self::$gradereportpreferences);
2708 return self::$managesetting;
2711 * Returns an array of plugin reports as grade_plugin_info objects
2713 * @param int $courseid
2716 public static function get_plugins_reports($courseid) {
2719 if (self::$gradereports !== null) {
2720 return self::$gradereports;
2722 $context = context_course::instance($courseid);
2723 $gradereports = array();
2724 $gradepreferences = array();
2725 foreach (core_component::get_plugin_list('gradereport') as $plugin => $plugindir) {
2726 //some reports make no sense if we're not within a course
2727 if ($courseid==$SITE->id && ($plugin=='grader' || $plugin=='user')) {
2731 // Remove ones we can't see
2732 if (!has_capability('gradereport/'.$plugin.':view', $context)) {
2736 $pluginstr = get_string('pluginname', 'gradereport_'.$plugin);
2737 $url = new moodle_url('/grade/report/'.$plugin.'/index.php', array('id'=>$courseid));
2738 $gradereports[$plugin] = new grade_plugin_info($plugin, $url, $pluginstr);
2740 // Add link to preferences tab if such a page exists
2741 if (file_exists($plugindir.'/preferences.php')) {
2742 $url = new moodle_url('/grade/report/'.$plugin.'/preferences.php', array('id'=>$courseid));
2743 $gradepreferences[$plugin] = new grade_plugin_info($plugin, $url,
2744 get_string('mypreferences', 'grades') . ': ' . $pluginstr);
2747 if (count($gradereports) == 0) {
2748 $gradereports = false;
2749 $gradepreferences = false;
2750 } else if (count($gradepreferences) == 0) {
2751 $gradepreferences = false;
2752 asort($gradereports);
2754 asort($gradereports);
2755 asort($gradepreferences);
2757 self::$gradereports = $gradereports;
2758 self::$gradereportpreferences = $gradepreferences;
2759 return self::$gradereports;
2763 * Get information on scales
2764 * @param int $courseid
2765 * @return grade_plugin_info
2767 public static function get_info_scales($courseid) {
2768 if (self::$scaleinfo !== null) {
2769 return self::$scaleinfo;
2771 if (has_capability('moodle/course:managescales', context_course::instance($courseid))) {
2772 $url = new moodle_url('/grade/edit/scale/index.php', array('id'=>$courseid));
2773 self::$scaleinfo = new grade_plugin_info('scale', $url, get_string('view'));
2775 self::$scaleinfo = false;
2777 return self::$scaleinfo;
2780 * Get information on outcomes
2781 * @param int $courseid
2782 * @return grade_plugin_info
2784 public static function get_info_outcomes($courseid) {
2787 if (self::$outcomeinfo !== null) {
2788 return self::$outcomeinfo;
2790 $context = context_course::instance($courseid);
2791 $canmanage = has_capability('moodle/grade:manage', $context);
2792 $canupdate = has_capability('moodle/course:update', $context);
2793 if (!empty($CFG->enableoutcomes) && ($canmanage || $canupdate)) {
2794 $outcomes = array();
2796 if ($courseid!=$SITE->id) {
2797 $url = new moodle_url('/grade/edit/outcome/course.php', array('id'=>$courseid));
2798 $outcomes['course'] = new grade_plugin_info('course', $url, get_string('outcomescourse', 'grades'));
2800 $url = new moodle_url('/grade/edit/outcome/index.php', array('id'=>$courseid));
2801 $outcomes['edit'] = new grade_plugin_info('edit', $url, get_string('editoutcomes', 'grades'));
2802 $url = new moodle_url('/grade/edit/outcome/import.php', array('courseid'=>$courseid));
2803 $outcomes['import'] = new grade_plugin_info('import', $url, get_string('importoutcomes', 'grades'));
2805 if ($courseid!=$SITE->id) {
2806 $url = new moodle_url('/grade/edit/outcome/course.php', array('id'=>$courseid));
2807 $outcomes['edit'] = new grade_plugin_info('edit', $url, get_string('outcomescourse', 'grades'));
2810 self::$outcomeinfo = $outcomes;
2812 self::$outcomeinfo = false;
2814 return self::$outcomeinfo;
2817 * Get information on letters
2818 * @param int $courseid
2821 public static function get_info_letters($courseid) {
2823 if (self::$letterinfo !== null) {
2824 return self::$letterinfo;
2826 $context = context_course::instance($courseid);
2827 $canmanage = has_capability('moodle/grade:manage', $context);
2828 $canmanageletters = has_capability('moodle/grade:manageletters', $context);
2829 if ($canmanage || $canmanageletters) {
2830 // Redirect to system context when report is accessed from admin settings MDL-31633
2831 if ($context->instanceid == $SITE->id) {
2832 $param = array('edit' => 1);
2834 $param = array('edit' => 1,'id' => $context->id);
2836 self::$letterinfo = array(
2837 'view' => new grade_plugin_info('view', new moodle_url('/grade/edit/letter/index.php', array('id'=>$context->id)), get_string('view')),
2838 'edit' => new grade_plugin_info('edit', new moodle_url('/grade/edit/letter/index.php', $param), get_string('edit'))
2841 self::$letterinfo = false;
2843 return self::$letterinfo;
2846 * Get information import plugins
2847 * @param int $courseid
2850 public static function get_plugins_import($courseid) {
2853 if (self::$importplugins !== null) {
2854 return self::$importplugins;
2856 $importplugins = array();
2857 $context = context_course::instance($courseid);
2859 if (has_capability('moodle/grade:import', $context)) {
2860 foreach (core_component::get_plugin_list('gradeimport') as $plugin => $plugindir) {
2861 if (!has_capability('gradeimport/'.$plugin.':view', $context)) {
2864 $pluginstr = get_string('pluginname', 'gradeimport_'.$plugin);
2865 $url = new moodle_url('/grade/import/'.$plugin.'/index.php', array('id'=>$courseid));
2866 $importplugins[$plugin] = new grade_plugin_info($plugin, $url, $pluginstr);
2869 // Show key manager if grade publishing is enabled and the user has xml publishing capability.
2870 // XML is the only grade import plugin that has publishing feature.
2871 if ($CFG->gradepublishing && has_capability('gradeimport/xml:publish', $context)) {
2872 $url = new moodle_url('/grade/import/keymanager.php', array('id'=>$courseid));
2873 $importplugins['keymanager'] = new grade_plugin_info('keymanager', $url, get_string('keymanager', 'grades'));
2877 if (count($importplugins) > 0) {
2878 asort($importplugins);
2879 self::$importplugins = $importplugins;
2881 self::$importplugins = false;
2883 return self::$importplugins;
2886 * Get information export plugins
2887 * @param int $courseid
2890 public static function get_plugins_export($courseid) {
2893 if (self::$exportplugins !== null) {
2894 return self::$exportplugins;
2896 $context = context_course::instance($courseid);
2897 $exportplugins = array();
2898 $canpublishgrades = 0;
2899 if (has_capability('moodle/grade:export', $context)) {
2900 foreach (core_component::get_plugin_list('gradeexport') as $plugin => $plugindir) {
2901 if (!has_capability('gradeexport/'.$plugin.':view', $context)) {
2904 // All the grade export plugins has grade publishing capabilities.
2905 if (has_capability('gradeexport/'.$plugin.':publish', $context)) {
2906 $canpublishgrades++;
2909 $pluginstr = get_string('pluginname', 'gradeexport_'.$plugin);
2910 $url = new moodle_url('/grade/export/'.$plugin.'/index.php', array('id'=>$courseid));
2911 $exportplugins[$plugin] = new grade_plugin_info($plugin, $url, $pluginstr);
2914 // Show key manager if grade publishing is enabled and the user has at least one grade publishing capability.
2915 if ($CFG->gradepublishing && $canpublishgrades != 0) {
2916 $url = new moodle_url('/grade/export/keymanager.php', array('id'=>$courseid));
2917 $exportplugins['keymanager'] = new grade_plugin_info('keymanager', $url, get_string('keymanager', 'grades'));
2920 if (count($exportplugins) > 0) {
2921 asort($exportplugins);
2922 self::$exportplugins = $exportplugins;
2924 self::$exportplugins = false;
2926 return self::$exportplugins;
2930 * Returns the value of a field from a user record
2932 * @param stdClass $user object
2933 * @param stdClass $field object
2934 * @return string value of the field
2936 public static function get_user_field_value($user, $field) {
2937 if (!empty($field->customid)) {
2938 $fieldname = 'customfield_' . $field->shortname;
2939 if (!empty($user->{$fieldname}) || is_numeric($user->{$fieldname})) {
2940 $fieldvalue = $user->{$fieldname};
2942 $fieldvalue = $field->default;
2945 $fieldvalue = $user->{$field->shortname};
2951 * Returns an array of user profile fields to be included in export
2953 * @param int $courseid
2954 * @param bool $includecustomfields
2955 * @return array An array of stdClass instances with customid, shortname, datatype, default and fullname fields
2957 public static function get_user_profile_fields($courseid, $includecustomfields = false) {
2960 // Gets the fields that have to be hidden
2961 $hiddenfields = array_map('trim', explode(',', $CFG->hiddenuserfields));
2962 $context = context_course::instance($courseid);
2963 $canseehiddenfields = has_capability('moodle/course:viewhiddenuserfields', $context);
2964 if ($canseehiddenfields) {
2965 $hiddenfields = array();
2969 require_once($CFG->dirroot.'/user/lib.php'); // Loads user_get_default_fields()
2970 require_once($CFG->dirroot.'/user/profile/lib.php'); // Loads constants, such as PROFILE_VISIBLE_ALL
2971 $userdefaultfields = user_get_default_fields();
2973 // Sets the list of profile fields
2974 $userprofilefields = array_map('trim', explode(',', $CFG->grade_export_userprofilefields));
2975 if (!empty($userprofilefields)) {
2976 foreach ($userprofilefields as $field) {
2977 $field = trim($field);
2978 if (in_array($field, $hiddenfields) || !in_array($field, $userdefaultfields)) {
2981 $obj = new stdClass();
2983 $obj->shortname = $field;
2984 $obj->fullname = get_string($field);
2989 // Sets the list of custom profile fields
2990 $customprofilefields = array_map('trim', explode(',', $CFG->grade_export_customprofilefields));
2991 if ($includecustomfields && !empty($customprofilefields)) {
2992 list($wherefields, $whereparams) = $DB->get_in_or_equal($customprofilefields);
2993 $customfields = $DB->get_records_sql("SELECT f.*
2994 FROM {user_info_field} f
2995 JOIN {user_info_category} c ON f.categoryid=c.id
2996 WHERE f.shortname $wherefields
2997 ORDER BY c.sortorder ASC, f.sortorder ASC", $whereparams);
2998 if (!is_array($customfields)) {
3002 foreach ($customfields as $field) {
3003 // Make sure we can display this custom field
3004 if (!in_array($field->shortname, $customprofilefields)) {
3006 } else if (in_array($field->shortname, $hiddenfields)) {
3008 } else if ($field->visible != PROFILE_VISIBLE_ALL && !$canseehiddenfields) {
3012 $obj = new stdClass();
3013 $obj->customid = $field->id;
3014 $obj->shortname = $field->shortname;
3015 $obj->fullname = format_string($field->name);
3016 $obj->datatype = $field->datatype;
3017 $obj->default = $field->defaultdata;
3026 * This helper method gets a snapshot of all the weights for a course.
3027 * It is used as a quick method to see if any wieghts have been automatically adjusted.
3028 * @param int $courseid
3029 * @return array of itemid -> aggregationcoef2
3031 public static function fetch_all_natural_weights_for_course($courseid) {
3035 $records = $DB->get_records('grade_items', array('courseid'=>$courseid), 'id', 'id, aggregationcoef2');
3036 foreach ($records as $record) {
3037 $result[$record->id] = $record->aggregationcoef2;