Merge branch 'MDL-47340-master' of git://github.com/jethac/moodle
[moodle.git] / grade / lib.php
CommitLineData
cf72e2dd 1<?php
cf72e2dd 2// This file is part of Moodle - http://moodle.org/
3//
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.
8//
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.
13//
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/>.
16
cf72e2dd 17/**
18 * Functions used by gradebook plugins and reports.
19 *
a153c9f2 20 * @package core_grades
cf72e2dd 21 * @copyright 2009 Petr Skoda and Nicolas Connault
22 * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
23 */
8ad36f4c 24
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25require_once($CFG->libdir . '/gradelib.php');
26require_once($CFG->dirroot . '/grade/export/lib.php');
7a6b7acf 27
0f5660f7 28/**
29 * This class iterates over all users that are graded in a course.
b9f49659 30 * Returns detailed info about users and their grades.
cf72e2dd 31 *
32 * @author Petr Skoda <skodak@moodle.org>
33 * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
0f5660f7 34 */
35class graded_users_iterator {
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36
37 /**
38 * The couse whose users we are interested in
39 */
40 protected $course;
41
42 /**
43 * An array of grade items or null if only user data was requested
44 */
45 protected $grade_items;
46
47 /**
48 * The group ID we are interested in. 0 means all groups.
49 */
50 protected $groupid;
51
52 /**
53 * A recordset of graded users
54 */
55 protected $users_rs;
56
57 /**
58 * A recordset of user grades (grade_grade instances)
59 */
60 protected $grades_rs;
61
62 /**
63 * Array used when moving to next user while iterating through the grades recordset
64 */
65 protected $gradestack;
66
67 /**
68 * The first field of the users table by which the array of users will be sorted
69 */
70 protected $sortfield1;
71
72 /**
73 * Should sortfield1 be ASC or DESC
74 */
75 protected $sortorder1;
76
77 /**
78 * The second field of the users table by which the array of users will be sorted
79 */
80 protected $sortfield2;
81
82 /**
83 * Should sortfield2 be ASC or DESC
84 */
85 protected $sortorder2;
0f5660f7 86
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87 /**
88 * Should users whose enrolment has been suspended be ignored?
89 */
90 protected $onlyactive = false;
91
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92 /**
93 * Enable user custom fields
94 */
95 protected $allowusercustomfields = false;
96
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97 /**
98 * List of suspended users in course. This includes users whose enrolment status is suspended
99 * or enrolment has expired or not started.
100 */
101 protected $suspendedusers = array();
102
0f5660f7 103 /**
104 * Constructor
cf72e2dd 105 *
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
d08bba83 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 $sortorder2 The order in which the second sorting field will be sorted (ASC or DESC)
0f5660f7 113 */
728ff21b 114 public function __construct($course, $grade_items=null, $groupid=0,
cf72e2dd 115 $sortfield1='lastname', $sortorder1='ASC',
116 $sortfield2='firstname', $sortorder2='ASC') {
0f5660f7 117 $this->course = $course;
118 $this->grade_items = $grade_items;
119 $this->groupid = $groupid;
d08bba83 120 $this->sortfield1 = $sortfield1;
121 $this->sortorder1 = $sortorder1;
122 $this->sortfield2 = $sortfield2;
123 $this->sortorder2 = $sortorder2;
0f5660f7 124
125 $this->gradestack = array();
126 }
127
128 /**
129 * Initialise the iterator
728ff21b 130 *
0f5660f7 131 * @return boolean success
132 */
d24832f9 133 public function init() {
134 global $CFG, $DB;
0f5660f7 135
136 $this->close();
137
63d2081e 138 export_verify_grades($this->course->id);
0f5660f7 139 $course_item = grade_item::fetch_course_item($this->course->id);
140 if ($course_item->needsupdate) {
4e829d48 141 // Can not calculate all final grades - sorry.
0f5660f7 142 return false;
143 }
144
d4060472 145 $coursecontext = context_course::instance($this->course->id);
656d17c2 146
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MN
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(',', $CFG->gradebookroles), SQL_PARAMS_NAMED, 'grbr');
78ab98bc 149 list($enrolledsql, $enrolledparams) = get_enrolled_sql($coursecontext, '', 0, $this->onlyactive);
656d17c2 150
4e829d48 151 $params = array_merge($params, $enrolledparams, $relatedctxparams);
0f5660f7 152
153 if ($this->groupid) {
d24832f9 154 $groupsql = "INNER JOIN {groups_members} gm ON gm.userid = u.id";
e58fcb35 155 $groupwheresql = "AND gm.groupid = :groupid";
d24832f9 156 // $params contents: gradebookroles
e58fcb35 157 $params['groupid'] = $this->groupid;
0f5660f7 158 } else {
159 $groupsql = "";
160 $groupwheresql = "";
161 }
162
345674ca 163 if (empty($this->sortfield1)) {
4e829d48 164 // We must do some sorting even if not specified.
345674ca 165 $ofields = ", u.id AS usrt";
166 $order = "usrt ASC";
167
168 } else {
169 $ofields = ", u.$this->sortfield1 AS usrt1";
170 $order = "usrt1 $this->sortorder1";
171 if (!empty($this->sortfield2)) {
0febb12d 172 $ofields .= ", u.$this->sortfield2 AS usrt2";
345674ca 173 $order .= ", usrt2 $this->sortorder2";
174 }
175 if ($this->sortfield1 != 'id' and $this->sortfield2 != 'id') {
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MN
176 // User order MUST be the same in both queries,
177 // must include the only unique user->id if not already present.
345674ca 178 $ofields .= ", u.id AS usrt";
179 $order .= ", usrt ASC";
180 }
181 }
182
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183 $userfields = 'u.*';
184 $customfieldssql = '';
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185 if ($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)) {
293f42b6 190 $customfieldssql .= "
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FM
191 LEFT JOIN (SELECT * FROM {user_info_data}
192 WHERE fieldid = :cf$customfieldscount) cf$customfieldscount
193 ON u.id = cf$customfieldscount.userid";
c1735baf 194 $userfields .= ", cf$customfieldscount.data AS customfield_{$field->shortname}";
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FM
195 $params['cf'.$customfieldscount] = $field->customid;
196 $customfieldscount++;
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CF
197 }
198 }
199 }
200
293f42b6 201 $users_sql = "SELECT $userfields $ofields
d24832f9 202 FROM {user} u
656d17c2 203 JOIN ($enrolledsql) je ON je.id = u.id
293f42b6 204 $groupsql $customfieldssql
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205 JOIN (
206 SELECT DISTINCT ra.userid
207 FROM {role_assignments} ra
208 WHERE ra.roleid $gradebookroles_sql
4e829d48 209 AND ra.contextid $relatedctxsql
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210 ) rainner ON rainner.userid = u.id
211 WHERE u.deleted = 0
345674ca 212 $groupwheresql
213 ORDER BY $order";
d24832f9 214 $this->users_rs = $DB->get_recordset_sql($users_sql, $params);
0f5660f7 215
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RT
216 if (!$this->onlyactive) {
217 $context = context_course::instance($this->course->id);
218 $this->suspendedusers = get_suspended_userids($context);
219 } else {
220 $this->suspendedusers = array();
221 }
222
0f5660f7 223 if (!empty($this->grade_items)) {
224 $itemids = array_keys($this->grade_items);
cf717dc2 225 list($itemidsql, $grades_params) = $DB->get_in_or_equal($itemids, SQL_PARAMS_NAMED, 'items');
d24832f9 226 $params = array_merge($params, $grades_params);
0f5660f7 227
345674ca 228 $grades_sql = "SELECT g.* $ofields
d24832f9 229 FROM {grade_grades} g
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230 JOIN {user} u ON g.userid = u.id
231 JOIN ($enrolledsql) je ON je.id = u.id
0f5660f7 232 $groupsql
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233 JOIN (
234 SELECT DISTINCT ra.userid
235 FROM {role_assignments} ra
236 WHERE ra.roleid $gradebookroles_sql
4e829d48 237 AND ra.contextid $relatedctxsql
4f82032a 238 ) rainner ON rainner.userid = u.id
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AD
239 WHERE u.deleted = 0
240 AND g.itemid $itemidsql
241 $groupwheresql
345674ca 242 ORDER BY $order, g.itemid ASC";
d24832f9 243 $this->grades_rs = $DB->get_recordset_sql($grades_sql, $params);
345674ca 244 } else {
245 $this->grades_rs = false;
0f5660f7 246 }
345674ca 247
0f5660f7 248 return true;
249 }
250
251 /**
252 * Returns information about the next user
253 * @return mixed array of user info, all grades and feedback or null when no more users found
254 */
728ff21b 255 public function next_user() {
03cedd62 256 if (!$this->users_rs) {
0f5660f7 257 return false; // no users present
258 }
259
5c75a0a3 260 if (!$this->users_rs->valid()) {
345674ca 261 if ($current = $this->_pop()) {
262 // this is not good - user or grades updated between the two reads above :-(
263 }
264
0f5660f7 265 return false; // no more users
5c75a0a3 266 } else {
267 $user = $this->users_rs->current();
268 $this->users_rs->next();
0f5660f7 269 }
270
345674ca 271 // find grades of this user
0f5660f7 272 $grade_records = array();
273 while (true) {
274 if (!$current = $this->_pop()) {
275 break; // no more grades
276 }
277
5c75a0a3 278 if (empty($current->userid)) {
279 break;
280 }
281
345674ca 282 if ($current->userid != $user->id) {
283 // grade of the next user, we have all for this user
0f5660f7 284 $this->_push($current);
285 break;
286 }
287
288 $grade_records[$current->itemid] = $current;
289 }
290
291 $grades = array();
292 $feedbacks = array();
293
d08bba83 294 if (!empty($this->grade_items)) {
345674ca 295 foreach ($this->grade_items as $grade_item) {
6189c7b4
FM
296 if (!isset($feedbacks[$grade_item->id])) {
297 $feedbacks[$grade_item->id] = new stdClass();
298 }
345674ca 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);
305 } else {
306 $feedbacks[$grade_item->id]->feedback = '';
307 $feedbacks[$grade_item->id]->feedbackformat = FORMAT_MOODLE;
cf72e2dd 308 $grades[$grade_item->id] =
309 new grade_grade(array('userid'=>$user->id, 'itemid'=>$grade_item->id), false);
345674ca 310 }
0f5660f7 311 }
312 }
313
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RT
314 // Set user suspended status.
315 $user->suspendedenrolment = isset($this->suspendedusers[$user->id]);
ace9051c 316 $result = new stdClass();
0f5660f7 317 $result->user = $user;
318 $result->grades = $grades;
319 $result->feedbacks = $feedbacks;
0f5660f7 320 return $result;
321 }
322
323 /**
728ff21b 324 * Close the iterator, do not forget to call this function
0f5660f7 325 */
728ff21b 326 public function close() {
caffc55a 327 if ($this->users_rs) {
d24832f9 328 $this->users_rs->close();
caffc55a 329 $this->users_rs = null;
0f5660f7 330 }
caffc55a 331 if ($this->grades_rs) {
d24832f9 332 $this->grades_rs->close();
caffc55a 333 $this->grades_rs = null;
0f5660f7 334 }
335 $this->gradestack = array();
336 }
337
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AD
338 /**
339 * Should all enrolled users be exported or just those with an active enrolment?
340 *
341 * @param bool $onlyactive True to limit the export to users with an active enrolment
342 */
343 public function require_active_enrolment($onlyactive = true) {
344 if (!empty($this->users_rs)) {
345 debugging('Calling require_active_enrolment() has no effect unless you call init() again', DEBUG_DEVELOPER);
346 }
347 $this->onlyactive = $onlyactive;
348 }
349
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FM
350 /**
351 * Allow custom fields to be included
352 *
353 * @param bool $allow Whether to allow custom fields or not
354 * @return void
355 */
356 public function allow_user_custom_fields($allow = true) {
357 if ($allow) {
358 $this->allowusercustomfields = true;
359 } else {
360 $this->allowusercustomfields = false;
361 }
362 }
cf72e2dd 363
0f5660f7 364 /**
728ff21b 365 * Add a grade_grade instance to the grade stack
cf72e2dd 366 *
367 * @param grade_grade $grade Grade object
368 *
369 * @return void
0f5660f7 370 */
728ff21b 371 private function _push($grade) {
0f5660f7 372 array_push($this->gradestack, $grade);
373 }
374
cf72e2dd 375
0f5660f7 376 /**
728ff21b 377 * Remove a grade_grade instance from the grade stack
cf72e2dd 378 *
728ff21b 379 * @return grade_grade current grade object
0f5660f7 380 */
728ff21b 381 private function _pop() {
d24832f9 382 global $DB;
0f5660f7 383 if (empty($this->gradestack)) {
8de7c8a7 384 if (empty($this->grades_rs) || !$this->grades_rs->valid()) {
cf72e2dd 385 return null; // no grades present
0f5660f7 386 }
387
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AD
388 $current = $this->grades_rs->current();
389
390 $this->grades_rs->next();
0f5660f7 391
7ce5df86 392 return $current;
0f5660f7 393 } else {
394 return array_pop($this->gradestack);
395 }
396 }
397}
398
d08bba83 399/**
400 * Print a selection popup form of the graded users in a course.
401 *
4d5059d4
SH
402 * @deprecated since 2.0
403 *
cf72e2dd 404 * @param int $course id of the course
d08bba83 405 * @param string $actionpage The page receiving the data from the popoup form
cf72e2dd 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 $return If true, will return the HTML, otherwise, will print directly
d08bba83 410 * @return null
411 */
7ac88172 412function print_graded_users_selector($course, $actionpage, $userid=0, $groupid=0, $includeall=true, $return=false) {
714b4745 413 global $CFG, $USER, $OUTPUT;
4d5059d4
SH
414 return $OUTPUT->render(grade_get_graded_users_select(substr($actionpage, 0, strpos($actionpage, '/')), $course, $userid, $groupid, $includeall));
415}
345674ca 416
4d5059d4 417function grade_get_graded_users_select($report, $course, $userid, $groupid, $includeall) {
4e829d48 418 global $USER, $CFG;
f9510667 419
879c99bb 420 if (is_null($userid)) {
421 $userid = $USER->id;
422 }
38c1dd19
RT
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);
d08bba83 427 $menu = array(); // Will be a list of userid => user name
38c1dd19 428 $menususpendedusers = array(); // Suspended users go to a separate optgroup.
772229f3 429 $gui = new graded_users_iterator($course, null, $groupid);
38c1dd19 430 $gui->require_active_enrolment($showonlyactiveenrol);
d08bba83 431 $gui->init();
10f5c046 432 $label = get_string('selectauser', 'grades');
7ac88172 433 if ($includeall) {
879c99bb 434 $menu[0] = get_string('allusers', 'grades');
10f5c046 435 $label = get_string('selectalloroneuser', 'grades');
d08bba83 436 }
d08bba83 437 while ($userdata = $gui->next_user()) {
438 $user = $userdata->user;
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RT
439 $userfullname = fullname($user);
440 if ($user->suspendedenrolment) {
441 $menususpendedusers[$user->id] = $userfullname;
442 } else {
443 $menu[$user->id] = $userfullname;
444 }
d08bba83 445 }
d08bba83 446 $gui->close();
447
7ac88172 448 if ($includeall) {
38c1dd19
RT
449 $menu[0] .= " (" . (count($menu) + count($menususpendedusers) - 1) . ")";
450 }
451
452 if (!empty($menususpendedusers)) {
453 $menu[] = array(get_string('suspendedusers') => $menususpendedusers);
879c99bb 454 }
4d5059d4 455 $select = new single_select(new moodle_url('/grade/report/'.$report.'/index.php', array('id'=>$course->id)), 'userid', $menu, $userid);
f8dab966
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456 $select->label = $label;
457 $select->formid = 'choosegradeuser';
4d5059d4 458 return $select;
d08bba83 459}
460
a9937aec
DW
461/**
462 * Hide warning about changed grades during upgrade to 2.8.
463 *
464 * @param int $courseid The current course id.
465 */
466function hide_natural_aggregation_upgrade_notice($courseid) {
c8eb1fae 467 unset_config('show_sumofgrades_upgrade_' . $courseid);
a9937aec
DW
468}
469
47d6e6a7
DW
470/**
471 * Hide warning about changed grades during upgrade to 2.8.
472 *
473 * @param int $courseid The current course id.
474 */
475function hide_aggregatesubcats_upgrade_notice($courseid) {
476 unset_config('show_aggregatesubcats_upgrade_' . $courseid);
477}
478
a9937aec
DW
479/**
480 * Print warning about changed grades during upgrade to 2.8.
481 *
482 * @param int $courseid The current course id.
483 * @param context $context The course context.
eafab799 484 * @param string $thispage The relative path for the current page. E.g. /grade/report/user/index.php
a9937aec
DW
485 * @param boolean $return return as string
486 *
487 * @return nothing or string if $return true
488 */
eafab799 489function print_natural_aggregation_upgrade_notice($courseid, $context, $thispage, $return=false) {
a9937aec
DW
490 global $OUTPUT;
491 $html = '';
a9937aec 492
eafab799
DW
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_' . $courseid);
497
498 // Do not do anything if they are not a teacher.
499 if ($hidesubcatswarning || $showsubcatswarning || $hidenaturalwarning || $shownaturalwarning) {
500 if (!has_capability('moodle/grade:manage', $context)) {
501 return '';
502 }
503 }
504
505 // Hide the warning if the user told it to go away.
506 if ($hidenaturalwarning) {
507 hide_natural_aggregation_upgrade_notice($courseid);
508 }
509 // Hide the warning if the user told it to go away.
510 if ($hidesubcatswarning) {
511 hide_aggregatesubcats_upgrade_notice($courseid);
512 }
513
514 if (!$hidenaturalwarning && $shownaturalwarning) {
a9937aec 515 $message = get_string('sumofgradesupgradedgrades', 'grades');
47d6e6a7 516 $hidemessage = get_string('upgradedgradeshidemessage', 'grades');
a9937aec
DW
517 $urlparams = array( 'id' => $courseid,
518 'seensumofgradesupgradedgrades' => true,
519 'sesskey' => sesskey());
eafab799 520 $goawayurl = new moodle_url($thispage, $urlparams);
a9937aec
DW
521 $goawaybutton = $OUTPUT->single_button($goawayurl, $hidemessage, 'get');
522 $html .= $OUTPUT->notification($message, 'notifysuccess');
523 $html .= $goawaybutton;
524 }
525
eafab799 526 if (!$hidesubcatswarning && $showsubcatswarning) {
47d6e6a7
DW
527 $message = get_string('aggregatesubcatsupgradedgrades', 'grades');
528 $hidemessage = get_string('upgradedgradeshidemessage', 'grades');
529 $urlparams = array( 'id' => $courseid,
530 'seenaggregatesubcatsupgradedgrades' => true,
531 'sesskey' => sesskey());
eafab799 532 $goawayurl = new moodle_url($thispage, $urlparams);
47d6e6a7
DW
533 $goawaybutton = $OUTPUT->single_button($goawayurl, $hidemessage, 'get');
534 $html .= $OUTPUT->notification($message, 'notifysuccess');
535 $html .= $goawaybutton;
536 }
537
a9937aec
DW
538 if ($return) {
539 return $html;
540 } else {
541 echo $html;
542 }
543}
544
0610812a 545/**
546 * Print grading plugin selection popup form.
547 *
cf72e2dd 548 * @param array $plugin_info An array of plugins containing information for the selector
0610812a 549 * @param boolean $return return as string
cf72e2dd 550 *
0610812a 551 * @return nothing or string if $return true
552 */
f1a3e072 553function print_grade_plugin_selector($plugin_info, $active_type, $active_plugin, $return=false) {
714b4745 554 global $CFG, $OUTPUT, $PAGE;
dc482cfa 555
556 $menu = array();
557 $count = 0;
558 $active = '';
559
560 foreach ($plugin_info as $plugin_type => $plugins) {
561 if ($plugin_type == 'strings') {
562 continue;
563 }
564
7981d537 565 $first_plugin = reset($plugins);
dc482cfa 566
f1a3e072
PS
567 $sectionname = $plugin_info['strings'][$plugin_type];
568 $section = array();
d4dcfc6b 569
f1a3e072 570 foreach ($plugins as $plugin) {
d4dcfc6b 571 $link = $plugin->link->out(false);
f1a3e072
PS
572 $section[$link] = $plugin->string;
573 $count++;
574 if ($plugin_type === $active_type and $plugin->id === $active_plugin) {
575 $active = $link;
dc482cfa 576 }
577 }
f1a3e072
PS
578
579 if ($section) {
580 $menu[] = array($sectionname=>$section);
581 }
dc482cfa 582 }
583
cf72e2dd 584 // finally print/return the popup form
dc482cfa 585 if ($count > 1) {
f1a3e072 586 $select = new url_select($menu, $active, null, 'choosepluginreport');
29bea634 587 $select->set_label(get_string('gradereport', 'grades'), array('class' => 'accesshide'));
7981d537 588 if ($return) {
f1a3e072 589 return $OUTPUT->render($select);
7981d537 590 } else {
f1a3e072 591 echo $OUTPUT->render($select);
7981d537 592 }
dc482cfa 593 } else {
594 // only one option - no plugin selector needed
595 return '';
596 }
597}
598
599/**
600 * Print grading plugin selection tab-based navigation.
601 *
cf72e2dd 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
dc482cfa 605 * @param boolean $return return as string
cf72e2dd 606 *
dc482cfa 607 * @return nothing or string if $return true
608 */
b827784e 609function grade_print_tabs($active_type, $active_plugin, $plugin_info, $return=false) {
dc482cfa 610 global $CFG, $COURSE;
1c1f64a2 611
e1513ca9 612 if (!isset($currenttab)) { //TODO: this is weird
dc482cfa 613 $currenttab = '';
614 }
615
616 $tabs = array();
617 $top_row = array();
618 $bottom_row = array();
619 $inactive = array($active_plugin);
620 $activated = array();
621
622 $count = 0;
623 $active = '';
624
625 foreach ($plugin_info as $plugin_type => $plugins) {
626 if ($plugin_type == 'strings') {
627 continue;
628 }
629
630 // If $plugins is actually the definition of a child-less parent link:
cf72e2dd 631 if (!empty($plugins->id)) {
632 $string = $plugins->string;
633 if (!empty($plugin_info[$active_type]->parent)) {
634 $string = $plugin_info[$active_type]->parent->string;
27eef3bb 635 }
636
cf72e2dd 637 $top_row[] = new tabobject($plugin_type, $plugins->link, $string);
dc482cfa 638 continue;
639 }
640
641 $first_plugin = reset($plugins);
cf72e2dd 642 $url = $first_plugin->link;
dc482cfa 643
644 if ($plugin_type == 'report') {
645 $url = $CFG->wwwroot.'/grade/report/index.php?id='.$COURSE->id;
646 }
647
648 $top_row[] = new tabobject($plugin_type, $url, $plugin_info['strings'][$plugin_type]);
649
650 if ($active_type == $plugin_type) {
651 foreach ($plugins as $plugin) {
cf72e2dd 652 $bottom_row[] = new tabobject($plugin->id, $plugin->link, $plugin->string);
653 if ($plugin->id == $active_plugin) {
654 $inactive = array($plugin->id);
dc482cfa 655 }
656 }
657 }
658 }
659
660 $tabs[] = $top_row;
661 $tabs[] = $bottom_row;
662
663 if ($return) {
664 return print_tabs($tabs, $active_type, $inactive, $activated, true);
665 } else {
666 print_tabs($tabs, $active_type, $inactive, $activated);
667 }
668}
669
cf72e2dd 670/**
671 * grade_get_plugin_info
672 *
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 $active_plugin active plugin type - grader, user, cvs, ...
676 *
677 * @return array
678 */
dc482cfa 679function grade_get_plugin_info($courseid, $active_type, $active_plugin) {
f7fcf4cd 680 global $CFG, $SITE;
cbff94ba 681
d4060472 682 $context = context_course::instance($courseid);
cbff94ba 683
dc482cfa 684 $plugin_info = array();
6e2f3121 685 $count = 0;
3af29899 686 $active = '';
dc482cfa 687 $url_prefix = $CFG->wwwroot . '/grade/';
688
689 // Language strings
4d5059d4 690 $plugin_info['strings'] = grade_helper::get_plugin_strings();
b827784e 691
4d5059d4
SH
692 if ($reports = grade_helper::get_plugins_reports($courseid)) {
693 $plugin_info['report'] = $reports;
b827784e 694 }
c46aeeab 695
eb84b779
MG
696 if ($settings = grade_helper::get_info_manage_settings($courseid)) {
697 $plugin_info['settings'] = $settings;
698 }
699
4d5059d4
SH
700 if ($scale = grade_helper::get_info_scales($courseid)) {
701 $plugin_info['scale'] = array('view'=>$scale);
cbff94ba 702 }
dc482cfa 703
4d5059d4
SH
704 if ($outcomes = grade_helper::get_info_outcomes($courseid)) {
705 $plugin_info['outcome'] = $outcomes;
cbff94ba 706 }
cbff94ba 707
4d5059d4
SH
708 if ($letters = grade_helper::get_info_letters($courseid)) {
709 $plugin_info['letter'] = $letters;
cbff94ba 710 }
4d5059d4
SH
711
712 if ($imports = grade_helper::get_plugins_import($courseid)) {
713 $plugin_info['import'] = $imports;
281ffa4a 714 }
c46aeeab 715
4d5059d4
SH
716 if ($exports = grade_helper::get_plugins_export($courseid)) {
717 $plugin_info['export'] = $exports;
281ffa4a 718 }
281ffa4a 719
4d5059d4
SH
720 foreach ($plugin_info as $plugin_type => $plugins) {
721 if (!empty($plugins->id) && $active_plugin == $plugins->id) {
722 $plugin_info['strings']['active_plugin_str'] = $plugins->string;
723 break;
281ffa4a 724 }
4d5059d4
SH
725 foreach ($plugins as $plugin) {
726 if (is_a($plugin, 'grade_plugin_info')) {
727 if ($active_plugin == $plugin->id) {
728 $plugin_info['strings']['active_plugin_str'] = $plugin->string;
729 }
3af29899 730 }
281ffa4a 731 }
cbff94ba 732 }
c46aeeab 733
dc482cfa 734 foreach ($plugin_info as $plugin_type => $plugins) {
cf72e2dd 735 if (!empty($plugins->id) && $active_plugin == $plugins->id) {
736 $plugin_info['strings']['active_plugin_str'] = $plugins->string;
dc482cfa 737 break;
78ad5f3f 738 }
dc482cfa 739 foreach ($plugins as $plugin) {
cf72e2dd 740 if (is_a($plugin, 'grade_plugin_info')) {
741 if ($active_plugin == $plugin->id) {
742 $plugin_info['strings']['active_plugin_str'] = $plugin->string;
743 }
78ad5f3f 744 }
78ad5f3f 745 }
dc482cfa 746 }
78ad5f3f 747
dc482cfa 748 return $plugin_info;
749}
284abb09 750
cf72e2dd 751/**
752 * A simple class containing info about grade plugins.
753 * Can be subclassed for special rules
754 *
a153c9f2 755 * @package core_grades
cf72e2dd 756 * @copyright 2009 Nicolas Connault
757 * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
758 */
759class grade_plugin_info {
760 /**
761 * A unique id for this plugin
762 *
763 * @var mixed
764 */
765 public $id;
766 /**
767 * A URL to access this plugin
768 *
769 * @var mixed
770 */
771 public $link;
772 /**
773 * The name of this plugin
774 *
775 * @var mixed
776 */
777 public $string;
778 /**
779 * Another grade_plugin_info object, parent of the current one
780 *
781 * @var mixed
782 */
783 public $parent;
784
785 /**
786 * Constructor
787 *
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 $parent Another grade_plugin_info object, parent of the current one
792 *
793 * @return void
794 */
795 public function __construct($id, $link, $string, $parent=null) {
796 $this->id = $id;
797 $this->link = $link;
798 $this->string = $string;
799 $this->parent = $parent;
800 }
801}
802
de0300ea 803/**
804 * Prints the page headers, breadcrumb trail, page heading, (optional) dropdown navigation menu and
805 * (optional) navigation tabs for any gradebook page. All gradebook pages MUST use these functions
806 * in favour of the usual print_header(), print_header_simple(), print_heading() etc.
807 * !IMPORTANT! Use of tabs.php file in gradebook pages is forbidden unless tabs are switched off at
808 * the site level for the gradebook ($CFG->grade_navmethod = GRADE_NAVMETHOD_DROPDOWN).
809 *
cf72e2dd 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
de0300ea 815 * @param boolean $return Whether to return (true) or echo (false) the HTML generated by this function
cf72e2dd 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
5625d33d 818 * @param boolean $shownavigation should the gradebook navigation drop down (or tabs) be shown?
1464bcc8
AG
819 * @param string $headerhelpidentifier The help string identifier if required.
820 * @param string $headerhelpcomponent The component for the help string.
de0300ea 821 *
822 * @return string HTML code or nothing if $return == false
823 */
cf72e2dd 824function print_grade_page_head($courseid, $active_type, $active_plugin=null,
34a2777c 825 $heading = false, $return=false,
1464bcc8 826 $buttons=false, $shownavigation=true, $headerhelpidentifier = null, $headerhelpcomponent = null) {
4d5059d4 827 global $CFG, $OUTPUT, $PAGE;
c46aeeab 828
eb84b779
MG
829 if ($active_type === 'preferences') {
830 // In Moodle 2.8 report preferences were moved under 'settings'. Allow backward compatibility for 3rd party grade reports.
831 $active_type = 'settings';
832 }
833
dc482cfa 834 $plugin_info = grade_get_plugin_info($courseid, $active_type, $active_plugin);
c46aeeab 835
dc482cfa 836 // Determine the string of the active plugin
837 $stractive_plugin = ($active_plugin) ? $plugin_info['strings']['active_plugin_str'] : $heading;
838 $stractive_type = $plugin_info['strings'][$active_type];
e0724506 839
cf72e2dd 840 if (empty($plugin_info[$active_type]->id) || !empty($plugin_info[$active_type]->parent)) {
4d5059d4
SH
841 $title = $PAGE->course->fullname.': ' . $stractive_type . ': ' . $stractive_plugin;
842 } else {
843 $title = $PAGE->course->fullname.': ' . $stractive_plugin;
c4c97a6d 844 }
845
367a75fa
SH
846 if ($active_type == 'report') {
847 $PAGE->set_pagelayout('report');
848 } else {
849 $PAGE->set_pagelayout('admin');
850 }
4d5059d4 851 $PAGE->set_title(get_string('grades') . ': ' . $stractive_type);
f3df5e14 852 $PAGE->set_heading($title);
4d5059d4
SH
853 if ($buttons instanceof single_button) {
854 $buttons = $OUTPUT->render($buttons);
855 }
f3df5e14 856 $PAGE->set_button($buttons);
6bf696bb
MG
857 if ($courseid != SITEID) {
858 grade_extend_settings($plugin_info, $courseid);
859 }
4d5059d4 860
f3df5e14 861 $returnval = $OUTPUT->header();
1464bcc8 862
f3df5e14 863 if (!$return) {
864 echo $returnval;
865 }
dc482cfa 866
867 // Guess heading if not given explicitly
868 if (!$heading) {
869 $heading = $stractive_plugin;
870 }
871
2821c495 872 if ($shownavigation) {
6bf696bb
MG
873 if ($courseid != SITEID &&
874 ($CFG->grade_navmethod == GRADE_NAVMETHOD_COMBO || $CFG->grade_navmethod == GRADE_NAVMETHOD_DROPDOWN)) {
2821c495
AD
875 $returnval .= print_grade_plugin_selector($plugin_info, $active_type, $active_plugin, $return);
876 }
5625d33d 877
1464bcc8
AG
878 $output = '';
879 // Add a help dialogue box if provided.
880 if (isset($headerhelpidentifier)) {
881 $output = $OUTPUT->heading_with_help($heading, $headerhelpidentifier, $headerhelpcomponent);
882 } else {
883 $output = $OUTPUT->heading($heading);
884 }
885
5625d33d 886 if ($return) {
1464bcc8 887 $returnval .= $output;
5625d33d 888 } else {
1464bcc8 889 echo $output;
5625d33d
AD
890 }
891
6bf696bb
MG
892 if ($courseid != SITEID &&
893 ($CFG->grade_navmethod == GRADE_NAVMETHOD_COMBO || $CFG->grade_navmethod == GRADE_NAVMETHOD_TABS)) {
2821c495
AD
894 $returnval .= grade_print_tabs($active_type, $active_plugin, $plugin_info, $return);
895 }
8354e716 896 }
dc482cfa 897
eafab799
DW
898 $returnval .= print_natural_aggregation_upgrade_notice($courseid,
899 context_course::instance($courseid),
f01972d9 900 $PAGE->url,
eafab799
DW
901 $return);
902
dc482cfa 903 if ($return) {
904 return $returnval;
6e2f3121 905 }
cbff94ba 906}
907
0610812a 908/**
7a6b7acf 909 * Utility class used for return tracking when using edit and other forms in grade plugins
cf72e2dd 910 *
a153c9f2 911 * @package core_grades
cf72e2dd 912 * @copyright 2009 Nicolas Connault
913 * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
0610812a 914 */
3af29899 915class grade_plugin_return {
d24832f9 916 public $type;
917 public $plugin;
918 public $courseid;
919 public $userid;
920 public $page;
281ffa4a 921
0610812a 922 /**
923 * Constructor
cf72e2dd 924 *
0610812a 925 * @param array $params - associative array with return parameters, if null parameter are taken from _GET or _POST
926 */
cf72e2dd 927 public function grade_plugin_return($params = null) {
3af29899 928 if (empty($params)) {
929 $this->type = optional_param('gpr_type', null, PARAM_SAFEDIR);
aff24313 930 $this->plugin = optional_param('gpr_plugin', null, PARAM_PLUGIN);
3af29899 931 $this->courseid = optional_param('gpr_courseid', null, PARAM_INT);
932 $this->userid = optional_param('gpr_userid', null, PARAM_INT);
933 $this->page = optional_param('gpr_page', null, PARAM_INT);
a983b6ec 934
a983b6ec 935 } else {
3af29899 936 foreach ($params as $key=>$value) {
4cc977a6 937 if (property_exists($this, $key)) {
3af29899 938 $this->$key = $value;
939 }
cbff94ba 940 }
941 }
6cd8c592 942 }
943
0610812a 944 /**
945 * Returns return parameters as options array suitable for buttons.
946 * @return array options
947 */
d24832f9 948 public function get_options() {
7a6b7acf 949 if (empty($this->type)) {
3af29899 950 return array();
865e9a82 951 }
6cd8c592 952
3af29899 953 $params = array();
6cd8c592 954
7a6b7acf 955 if (!empty($this->plugin)) {
956 $params['plugin'] = $this->plugin;
957 }
6cd8c592 958
3af29899 959 if (!empty($this->courseid)) {
960 $params['id'] = $this->courseid;
6cd8c592 961 }
9c61ba4d 962
3af29899 963 if (!empty($this->userid)) {
964 $params['userid'] = $this->userid;
9c61ba4d 965 }
9c61ba4d 966
3af29899 967 if (!empty($this->page)) {
968 $params['page'] = $this->page;
cbff94ba 969 }
865e9a82 970
3af29899 971 return $params;
cbff94ba 972 }
cbff94ba 973
0610812a 974 /**
975 * Returns return url
cf72e2dd 976 *
0610812a 977 * @param string $default default url when params not set
cf72e2dd 978 * @param array $extras Extra URL parameters
979 *
0610812a 980 * @return string url
981 */
d24832f9 982 public function get_return_url($default, $extras=null) {
3af29899 983 global $CFG;
cbff94ba 984
3af29899 985 if (empty($this->type) or empty($this->plugin)) {
986 return $default;
cbff94ba 987 }
988
65dd61bd 989 $url = $CFG->wwwroot.'/grade/'.$this->type.'/'.$this->plugin.'/index.php';
990 $glue = '?';
cbff94ba 991
3af29899 992 if (!empty($this->courseid)) {
993 $url .= $glue.'id='.$this->courseid;
994 $glue = '&amp;';
cbff94ba 995 }
cbff94ba 996
3af29899 997 if (!empty($this->userid)) {
998 $url .= $glue.'userid='.$this->userid;
999 $glue = '&amp;';
cbff94ba 1000 }
7e2d7c92 1001
3af29899 1002 if (!empty($this->page)) {
1003 $url .= $glue.'page='.$this->page;
65dd61bd 1004 $glue = '&amp;';
1005 }
1006
1007 if (!empty($extras)) {
cf72e2dd 1008 foreach ($extras as $key=>$value) {
65dd61bd 1009 $url .= $glue.$key.'='.$value;
1010 $glue = '&amp;';
7a6b7acf 1011 }
cbff94ba 1012 }
cbff94ba 1013
3af29899 1014 return $url;
cbff94ba 1015 }
cbff94ba 1016
0610812a 1017 /**
1018 * Returns string with hidden return tracking form elements.
1019 * @return string
1020 */
d24832f9 1021 public function get_form_fields() {
7a6b7acf 1022 if (empty($this->type)) {
3af29899 1023 return '';
cbff94ba 1024 }
cbff94ba 1025
3af29899 1026 $result = '<input type="hidden" name="gpr_type" value="'.$this->type.'" />';
7a6b7acf 1027
1028 if (!empty($this->plugin)) {
1029 $result .= '<input type="hidden" name="gpr_plugin" value="'.$this->plugin.'" />';
1030 }
0ca5abd6 1031
3af29899 1032 if (!empty($this->courseid)) {
1033 $result .= '<input type="hidden" name="gpr_courseid" value="'.$this->courseid.'" />';
cbff94ba 1034 }
cbff94ba 1035
3af29899 1036 if (!empty($this->userid)) {
1037 $result .= '<input type="hidden" name="gpr_userid" value="'.$this->userid.'" />';
cbff94ba 1038 }
cbff94ba 1039
3af29899 1040 if (!empty($this->page)) {
1041 $result .= '<input type="hidden" name="gpr_page" value="'.$this->page.'" />';
cbff94ba 1042 }
1043 }
cbff94ba 1044
0610812a 1045 /**
1046 * Add hidden elements into mform
cf72e2dd 1047 *
1048 * @param object &$mform moodle form object
1049 *
0610812a 1050 * @return void
1051 */
d24832f9 1052 public function add_mform_elements(&$mform) {
7a6b7acf 1053 if (empty($this->type)) {
3af29899 1054 return;
cbff94ba 1055 }
cbff94ba 1056
3af29899 1057 $mform->addElement('hidden', 'gpr_type', $this->type);
1058 $mform->setType('gpr_type', PARAM_SAFEDIR);
cbff94ba 1059
7a6b7acf 1060 if (!empty($this->plugin)) {
1061 $mform->addElement('hidden', 'gpr_plugin', $this->plugin);
aff24313 1062 $mform->setType('gpr_plugin', PARAM_PLUGIN);
7a6b7acf 1063 }
97033c86 1064
3af29899 1065 if (!empty($this->courseid)) {
1066 $mform->addElement('hidden', 'gpr_courseid', $this->courseid);
1067 $mform->setType('gpr_courseid', PARAM_INT);
cbff94ba 1068 }
cbff94ba 1069
3af29899 1070 if (!empty($this->userid)) {
1071 $mform->addElement('hidden', 'gpr_userid', $this->userid);
1072 $mform->setType('gpr_userid', PARAM_INT);
cbff94ba 1073 }
cbff94ba 1074
3af29899 1075 if (!empty($this->page)) {
1076 $mform->addElement('hidden', 'gpr_page', $this->page);
1077 $mform->setType('gpr_page', PARAM_INT);
cbff94ba 1078 }
1079 }
281ffa4a 1080
0610812a 1081 /**
1082 * Add return tracking params into url
cf72e2dd 1083 *
1c1f64a2 1084 * @param moodle_url $url A URL
cf72e2dd 1085 *
6ef4878b 1086 * @return string $url with return tracking params
0610812a 1087 */
1c1f64a2 1088 public function add_url_params(moodle_url $url) {
7a6b7acf 1089 if (empty($this->type)) {
3af29899 1090 return $url;
cbff94ba 1091 }
5609f9e6 1092
1c1f64a2 1093 $url->param('gpr_type', $this->type);
cbff94ba 1094
7a6b7acf 1095 if (!empty($this->plugin)) {
1c1f64a2 1096 $url->param('gpr_plugin', $this->plugin);
7a6b7acf 1097 }
cbff94ba 1098
3af29899 1099 if (!empty($this->courseid)) {
1c1f64a2 1100 $url->param('gpr_courseid' ,$this->courseid);
cbff94ba 1101 }
cbff94ba 1102
3af29899 1103 if (!empty($this->userid)) {
1c1f64a2 1104 $url->param('gpr_userid', $this->userid);
cbff94ba 1105 }
0a8a95c9 1106
3af29899 1107 if (!empty($this->page)) {
1c1f64a2 1108 $url->param('gpr_page', $this->page);
0a8a95c9 1109 }
5a412dbf 1110
3af29899 1111 return $url;
5a412dbf 1112 }
5a412dbf 1113}
7a6b7acf 1114
826c5f86 1115/**
1116 * Function central to gradebook for building and printing the navigation (breadcrumb trail).
cf72e2dd 1117 *
826c5f86 1118 * @param string $path The path of the calling script (using __FILE__?)
1119 * @param string $pagename The language string to use as the last part of the navigation (non-link)
cf72e2dd 1120 * @param mixed $id Either a plain integer (assuming the key is 'id') or
1121 * an array of keys and values (e.g courseid => $courseid, itemid...)
1122 *
826c5f86 1123 * @return string
1124 */
1125function grade_build_nav($path, $pagename=null, $id=null) {
f3df5e14 1126 global $CFG, $COURSE, $PAGE;
826c5f86 1127
1128 $strgrades = get_string('grades', 'grades');
1129
1130 // Parse the path and build navlinks from its elements
1131 $dirroot_length = strlen($CFG->dirroot) + 1; // Add 1 for the first slash
1132 $path = substr($path, $dirroot_length);
1133 $path = str_replace('\\', '/', $path);
1134
1135 $path_elements = explode('/', $path);
1136
1137 $path_elements_count = count($path_elements);
1138
826c5f86 1139 // First link is always 'grade'
a6855934 1140 $PAGE->navbar->add($strgrades, new moodle_url('/grade/index.php', array('id'=>$COURSE->id)));
826c5f86 1141
f3df5e14 1142 $link = null;
826c5f86 1143 $numberofelements = 3;
1144
1145 // Prepare URL params string
f3df5e14 1146 $linkparams = array();
826c5f86 1147 if (!is_null($id)) {
1148 if (is_array($id)) {
1149 foreach ($id as $idkey => $idvalue) {
f3df5e14 1150 $linkparams[$idkey] = $idvalue;
826c5f86 1151 }
1152 } else {
f3df5e14 1153 $linkparams['id'] = $id;
826c5f86 1154 }
1155 }
1156
1157 $navlink4 = null;
1158
0f78c4de 1159 // Remove file extensions from filenames
1160 foreach ($path_elements as $key => $filename) {
1161 $path_elements[$key] = str_replace('.php', '', $filename);
1162 }
1163
826c5f86 1164 // Second level links
1165 switch ($path_elements[1]) {
1166 case 'edit': // No link
1167 if ($path_elements[3] != 'index.php') {
1168 $numberofelements = 4;
1169 }
1170 break;
1171 case 'import': // No link
1172 break;
1173 case 'export': // No link
1174 break;
1175 case 'report':
1176 // $id is required for this link. Do not print it if $id isn't given
1177 if (!is_null($id)) {
a6855934 1178 $link = new moodle_url('/grade/report/index.php', $linkparams);
826c5f86 1179 }
1180
1181 if ($path_elements[2] == 'grader') {
1182 $numberofelements = 4;
1183 }
1184 break;
1185
1186 default:
1187 // If this element isn't among the ones already listed above, it isn't supported, throw an error.
cf72e2dd 1188 debugging("grade_build_nav() doesn't support ". $path_elements[1] .
1189 " as the second path element after 'grade'.");
826c5f86 1190 return false;
1191 }
f3df5e14 1192 $PAGE->navbar->add(get_string($path_elements[1], 'grades'), $link);
826c5f86 1193
1194 // Third level links
1195 if (empty($pagename)) {
1196 $pagename = get_string($path_elements[2], 'grades');
1197 }
1198
1199 switch ($numberofelements) {
1200 case 3:
f3df5e14 1201 $PAGE->navbar->add($pagename, $link);
826c5f86 1202 break;
1203 case 4:
826c5f86 1204 if ($path_elements[2] == 'grader' AND $path_elements[3] != 'index.php') {
b5e7b2bf 1205 $PAGE->navbar->add(get_string('pluginname', 'gradereport_grader'), new moodle_url('/grade/report/grader/index.php', $linkparams));
826c5f86 1206 }
f3df5e14 1207 $PAGE->navbar->add($pagename);
826c5f86 1208 break;
1209 }
826c5f86 1210
f3df5e14 1211 return '';
d4795a07 1212}
7a6b7acf 1213
e98871a2 1214/**
6cc3e350 1215 * General structure representing grade items in course
cf72e2dd 1216 *
a153c9f2 1217 * @package core_grades
cf72e2dd 1218 * @copyright 2009 Nicolas Connault
1219 * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
e98871a2 1220 */
6cc3e350 1221class grade_structure {
d24832f9 1222 public $context;
e98871a2 1223
d24832f9 1224 public $courseid;
e98871a2 1225
73ca5f01 1226 /**
1227 * Reference to modinfo for current course (for performance, to save
1228 * retrieving it from courseid every time). Not actually set except for
1229 * the grade_tree type.
1230 * @var course_modinfo
1231 */
1232 public $modinfo;
1233
e98871a2 1234 /**
1235 * 1D array of grade items only
1236 */
d24832f9 1237 public $items;
e98871a2 1238
6391ebe7 1239 /**
6cc3e350 1240 * Returns icon of element
cf72e2dd 1241 *
1242 * @param array &$element An array representing an element in the grade_tree
1243 * @param bool $spacerifnone return spacer if no icon found
1244 *
6cc3e350 1245 * @return string icon or spacer
6391ebe7 1246 */
d24832f9 1247 public function get_element_icon(&$element, $spacerifnone=false) {
6b608f8f 1248 global $CFG, $OUTPUT;
559276b1 1249 require_once $CFG->libdir.'/filelib.php';
6cc3e350 1250
1251 switch ($element['type']) {
1252 case 'item':
1253 case 'courseitem':
1254 case 'categoryitem':
cf72e2dd 1255 $is_course = $element['object']->is_course_item();
1256 $is_category = $element['object']->is_category_item();
1257 $is_scale = $element['object']->gradetype == GRADE_TYPE_SCALE;
1258 $is_value = $element['object']->gradetype == GRADE_TYPE_VALUE;
0077f571 1259 $is_outcome = !empty($element['object']->outcomeid);
cf72e2dd 1260
6cc3e350 1261 if ($element['object']->is_calculated()) {
dc482cfa 1262 $strcalc = get_string('calculatedgrade', 'grades');
b5d0cafc 1263 return '<img src="'.$OUTPUT->pix_url('i/calc') . '" class="icon itemicon" title="'.
cf72e2dd 1264 s($strcalc).'" alt="'.s($strcalc).'"/>';
6cc3e350 1265
cf72e2dd 1266 } else if (($is_course or $is_category) and ($is_scale or $is_value)) {
6cc3e350 1267 if ($category = $element['object']->get_item_category()) {
bfe969e8
DW
1268 $aggrstrings = grade_helper::get_aggregation_strings();
1269 $stragg = $aggrstrings[$category->aggregation];
6cc3e350 1270 switch ($category->aggregation) {
1271 case GRADE_AGGREGATE_MEAN:
1272 case GRADE_AGGREGATE_MEDIAN:
1273 case GRADE_AGGREGATE_WEIGHTED_MEAN:
1426edac 1274 case GRADE_AGGREGATE_WEIGHTED_MEAN2:
6cc3e350 1275 case GRADE_AGGREGATE_EXTRACREDIT_MEAN:
b5d0cafc 1276 return '<img src="'.$OUTPUT->pix_url('i/agg_mean') . '" ' .
cf72e2dd 1277 'class="icon itemicon" title="'.s($stragg).'" alt="'.s($stragg).'"/>';
0758a08e 1278 case GRADE_AGGREGATE_SUM:
b5d0cafc 1279 return '<img src="'.$OUTPUT->pix_url('i/agg_sum') . '" ' .
cf72e2dd 1280 'class="icon itemicon" title="'.s($stragg).'" alt="'.s($stragg).'"/>';
9dd80882
DW
1281 default:
1282 return '<img src="'.$OUTPUT->pix_url('i/calc') . '" ' .
1283 'class="icon itemicon" title="'.s($stragg).'" alt="'.s($stragg).'"/>';
6cc3e350 1284 }
1285 }
1286
1287 } else if ($element['object']->itemtype == 'mod') {
0077f571
AD
1288 //prevent outcomes being displaying the same icon as the activity they are attached to
1289 if ($is_outcome) {
1290 $stroutcome = s(get_string('outcome', 'grades'));
1291 return '<img src="'.$OUTPUT->pix_url('i/outcomes') . '" ' .
1292 'class="icon itemicon" title="'.$stroutcome.
1293 '" alt="'.$stroutcome.'"/>';
1294 } else {
1295 $strmodname = get_string('modulename', $element['object']->itemmodule);
1296 return '<img src="'.$OUTPUT->pix_url('icon',
e63f88c9 1297 $element['object']->itemmodule) . '" ' .
cf72e2dd 1298 'class="icon itemicon" title="' .s($strmodname).
1299 '" alt="' .s($strmodname).'"/>';
0077f571 1300 }
6cc3e350 1301 } else if ($element['object']->itemtype == 'manual') {
1302 if ($element['object']->is_outcome_item()) {
dc482cfa 1303 $stroutcome = get_string('outcome', 'grades');
b5d0cafc 1304 return '<img src="'.$OUTPUT->pix_url('i/outcomes') . '" ' .
cf72e2dd 1305 'class="icon itemicon" title="'.s($stroutcome).
1306 '" alt="'.s($stroutcome).'"/>';
6cc3e350 1307 } else {
dc482cfa 1308 $strmanual = get_string('manualitem', 'grades');
0cddd851 1309 return '<img src="'.$OUTPUT->pix_url('i/manual_item') . '" '.
cf72e2dd 1310 'class="icon itemicon" title="'.s($strmanual).
1311 '" alt="'.s($strmanual).'"/>';
6cc3e350 1312 }
1313 }
1314 break;
1315
1316 case 'category':
dc482cfa 1317 $strcat = get_string('category', 'grades');
0cddd851 1318 return '<img src="'.$OUTPUT->pix_url('i/folder') . '" class="icon itemicon" ' .
cf72e2dd 1319 'title="'.s($strcat).'" alt="'.s($strcat).'" />';
6cc3e350 1320 }
1321
1322 if ($spacerifnone) {
b11681e0 1323 return $OUTPUT->spacer().' ';
6cc3e350 1324 } else {
1325 return '';
1326 }
1327 }
6391ebe7 1328
e98871a2 1329 /**
6cc3e350 1330 * Returns name of element optionally with icon and link
cf72e2dd 1331 *
1332 * @param array &$element An array representing an element in the grade_tree
1333 * @param bool $withlink Whether or not this header has a link
1334 * @param bool $icon Whether or not to display an icon with this header
1335 * @param bool $spacerifnone return spacer if no icon found
65c2ac93 1336 * @param bool $withdescription Show description if defined by this item.
cf72e2dd 1337 *
1338 * @return string header
e98871a2 1339 */
65c2ac93 1340 public function get_element_header(&$element, $withlink=false, $icon=true, $spacerifnone=false, $withdescription=false) {
6cc3e350 1341 $header = '';
1342
1343 if ($icon) {
1344 $header .= $this->get_element_icon($element, $spacerifnone);
1345 }
1346
dc482cfa 1347 $header .= $element['object']->get_name();
6cc3e350 1348
cf72e2dd 1349 if ($element['type'] != 'item' and $element['type'] != 'categoryitem' and
1350 $element['type'] != 'courseitem') {
6cc3e350 1351 return $header;
1352 }
1353
73ca5f01 1354 if ($withlink) {
1355 $url = $this->get_activity_link($element);
1356 if ($url) {
ace9051c 1357 $a = new stdClass();
45a639d5 1358 $a->name = get_string('modulename', $element['object']->itemmodule);
dc482cfa 1359 $title = get_string('linktoactivity', 'grades', $a);
6cc3e350 1360
73ca5f01 1361 $header = html_writer::link($url, $header, array('title' => $title));
46d1af82 1362 }
6cc3e350 1363 }
1364
65c2ac93
DW
1365 if ($withdescription) {
1366 $desc = $element['object']->get_description();
1367 if (!empty($desc)) {
1368 $header .= '<div class="gradeitemdescription">' . s($desc) . '</div><div class="gradeitemdescriptionfiller"></div>';
1369 }
1370 }
1371
6cc3e350 1372 return $header;
1373 }
1374
73ca5f01 1375 private function get_activity_link($element) {
1376 global $CFG;
eff314b0
DM
1377 /** @var array static cache of the grade.php file existence flags */
1378 static $hasgradephp = array();
73ca5f01 1379
1380 $itemtype = $element['object']->itemtype;
1381 $itemmodule = $element['object']->itemmodule;
1382 $iteminstance = $element['object']->iteminstance;
25ab1d50 1383 $itemnumber = $element['object']->itemnumber;
73ca5f01 1384
1385 // Links only for module items that have valid instance, module and are
1386 // called from grade_tree with valid modinfo
1387 if ($itemtype != 'mod' || !$iteminstance || !$itemmodule || !$this->modinfo) {
1388 return null;
1389 }
1390
1391 // Get $cm efficiently and with visibility information using modinfo
1392 $instances = $this->modinfo->get_instances();
1393 if (empty($instances[$itemmodule][$iteminstance])) {
1394 return null;
1395 }
1396 $cm = $instances[$itemmodule][$iteminstance];
1397
1398 // Do not add link if activity is not visible to the current user
1399 if (!$cm->uservisible) {
1400 return null;
1401 }
1402
eff314b0
DM
1403 if (!array_key_exists($itemmodule, $hasgradephp)) {
1404 if (file_exists($CFG->dirroot . '/mod/' . $itemmodule . '/grade.php')) {
1405 $hasgradephp[$itemmodule] = true;
1406 } else {
1407 $hasgradephp[$itemmodule] = false;
1408 }
1409 }
1410
73ca5f01 1411 // If module has grade.php, link to that, otherwise view.php
eff314b0 1412 if ($hasgradephp[$itemmodule]) {
c97933ff
MG
1413 $args = array('id' => $cm->id, 'itemnumber' => $itemnumber);
1414 if (isset($element['userid'])) {
1415 $args['userid'] = $element['userid'];
1416 }
1417 return new moodle_url('/mod/' . $itemmodule . '/grade.php', $args);
73ca5f01 1418 } else {
1419 return new moodle_url('/mod/' . $itemmodule . '/view.php', array('id' => $cm->id));
1420 }
1421 }
1422
bb17ac1e
DM
1423 /**
1424 * Returns URL of a page that is supposed to contain detailed grade analysis
1425 *
bb17ac1e
DM
1426 * At the moment, only activity modules are supported. The method generates link
1427 * to the module's file grade.php with the parameters id (cmid), itemid, itemnumber,
eff314b0 1428 * gradeid and userid. If the grade.php does not exist, null is returned.
bb17ac1e
DM
1429 *
1430 * @return moodle_url|null URL or null if unable to construct it
1431 */
1432 public function get_grade_analysis_url(grade_grade $grade) {
eff314b0
DM
1433 global $CFG;
1434 /** @var array static cache of the grade.php file existence flags */
1435 static $hasgradephp = array();
bb17ac1e
DM
1436
1437 if (empty($grade->grade_item) or !($grade->grade_item instanceof grade_item)) {
1438 throw new coding_exception('Passed grade without the associated grade item');
1439 }
1440 $item = $grade->grade_item;
1441
1442 if (!$item->is_external_item()) {
1443 // at the moment, only activity modules are supported
1444 return null;
1445 }
1446 if ($item->itemtype !== 'mod') {
1447 throw new coding_exception('Unknown external itemtype: '.$item->itemtype);
1448 }
1449 if (empty($item->iteminstance) or empty($item->itemmodule) or empty($this->modinfo)) {
1450 return null;
1451 }
1452
eff314b0
DM
1453 if (!array_key_exists($item->itemmodule, $hasgradephp)) {
1454 if (file_exists($CFG->dirroot . '/mod/' . $item->itemmodule . '/grade.php')) {
1455 $hasgradephp[$item->itemmodule] = true;
1456 } else {
1457 $hasgradephp[$item->itemmodule] = false;
1458 }
1459 }
1460
1461 if (!$hasgradephp[$item->itemmodule]) {
1462 return null;
1463 }
1464
bb17ac1e
DM
1465 $instances = $this->modinfo->get_instances();
1466 if (empty($instances[$item->itemmodule][$item->iteminstance])) {
1467 return null;
1468 }
1469 $cm = $instances[$item->itemmodule][$item->iteminstance];
1470 if (!$cm->uservisible) {
1471 return null;
1472 }
1473
1474 $url = new moodle_url('/mod/'.$item->itemmodule.'/grade.php', array(
1475 'id' => $cm->id,
1476 'itemid' => $item->id,
1477 'itemnumber' => $item->itemnumber,
1478 'gradeid' => $grade->id,
1479 'userid' => $grade->userid,
1480 ));
1481
1482 return $url;
1483 }
1484
1485 /**
1486 * Returns an action icon leading to the grade analysis page
1487 *
1488 * @param grade_grade $grade
1489 * @return string
1490 */
1491 public function get_grade_analysis_icon(grade_grade $grade) {
1492 global $OUTPUT;
1493
1494 $url = $this->get_grade_analysis_url($grade);
1495 if (is_null($url)) {
1496 return '';
1497 }
1498
c97933ff 1499 return $OUTPUT->action_icon($url, new pix_icon('t/preview',
bb17ac1e
DM
1500 get_string('gradeanalysis', 'core_grades')));
1501 }
1502
6cc3e350 1503 /**
1504 * Returns the grade eid - the grade may not exist yet.
cf72e2dd 1505 *
1506 * @param grade_grade $grade_grade A grade_grade object
1507 *
6cc3e350 1508 * @return string eid
1509 */
d24832f9 1510 public function get_grade_eid($grade_grade) {
6cc3e350 1511 if (empty($grade_grade->id)) {
1512 return 'n'.$grade_grade->itemid.'u'.$grade_grade->userid;
1513 } else {
1514 return 'g'.$grade_grade->id;
1515 }
1516 }
1517
1518 /**
1519 * Returns the grade_item eid
cf72e2dd 1520 * @param grade_item $grade_item A grade_item object
6cc3e350 1521 * @return string eid
1522 */
d24832f9 1523 public function get_item_eid($grade_item) {
ddb9c95f 1524 return 'ig'.$grade_item->id;
6cc3e350 1525 }
1526
cf72e2dd 1527 /**
1528 * Given a grade_tree element, returns an array of parameters
1529 * used to build an icon for that element.
1530 *
1531 * @param array $element An array representing an element in the grade_tree
1532 *
1533 * @return array
1534 */
1535 public function get_params_for_iconstr($element) {
9ecd4386 1536 $strparams = new stdClass();
1537 $strparams->category = '';
1538 $strparams->itemname = '';
1539 $strparams->itemmodule = '';
cf72e2dd 1540
9ecd4386 1541 if (!method_exists($element['object'], 'get_name')) {
1542 return $strparams;
1543 }
345674ca 1544
b285c5aa 1545 $strparams->itemname = html_to_text($element['object']->get_name());
9ecd4386 1546
1547 // If element name is categorytotal, get the name of the parent category
1548 if ($strparams->itemname == get_string('categorytotal', 'grades')) {
1549 $parent = $element['object']->get_parent_category();
1550 $strparams->category = $parent->get_name() . ' ';
1551 } else {
1552 $strparams->category = '';
1553 }
1554
1555 $strparams->itemmodule = null;
1556 if (isset($element['object']->itemmodule)) {
1557 $strparams->itemmodule = $element['object']->itemmodule;
345674ca 1558 }
9ecd4386 1559 return $strparams;
1560 }
1561
ae93f353
FM
1562 /**
1563 * Return a reset icon for the given element.
1564 *
1565 * @param array $element An array representing an element in the grade_tree
1566 * @param object $gpr A grade_plugin_return object
1567 * @return string
1568 */
1569 public function get_reset_icon($element, $gpr) {
1570 global $CFG, $OUTPUT;
1571
1572 // Limit to category items set to use the natural weights aggregation method, and users
1573 // with the capability to manage grades.
1574 if ($element['type'] != 'category' || $element['object']->aggregation != GRADE_AGGREGATE_SUM ||
1575 !has_capability('moodle/grade:manage', $this->context)) {
1576 return '';
1577 }
1578
1579 $str = get_string('resetweights', 'grades', $this->get_params_for_iconstr($element));
1580 $url = new moodle_url('/grade/edit/tree/action.php', array(
1581 'id' => $this->courseid,
1582 'action' => 'resetweights',
1583 'eid' => $element['eid'],
1584 'sesskey' => sesskey(),
1585 ));
1586
1587 return $OUTPUT->action_icon($gpr->add_url_params($url), new pix_icon('t/reset', $str));
1588 }
1589
6cc3e350 1590 /**
1591 * Return edit icon for give element
cf72e2dd 1592 *
1593 * @param array $element An array representing an element in the grade_tree
1594 * @param object $gpr A grade_plugin_return object
1595 *
6cc3e350 1596 * @return string
1597 */
d24832f9 1598 public function get_edit_icon($element, $gpr) {
6b608f8f 1599 global $CFG, $OUTPUT;
6cc3e350 1600
1601 if (!has_capability('moodle/grade:manage', $this->context)) {
1602 if ($element['type'] == 'grade' and has_capability('moodle/grade:edit', $this->context)) {
1603 // oki - let them override grade
1604 } else {
1605 return '';
1606 }
1607 }
1608
05aba805 1609 static $strfeedback = null;
1610 static $streditgrade = null;
1611 if (is_null($streditgrade)) {
1612 $streditgrade = get_string('editgrade', 'grades');
1613 $strfeedback = get_string('feedback');
6cc3e350 1614 }
1615
9ecd4386 1616 $strparams = $this->get_params_for_iconstr($element);
6ef4878b 1617
6cc3e350 1618 $object = $element['object'];
6cc3e350 1619
1620 switch ($element['type']) {
1621 case 'item':
1622 case 'categoryitem':
1623 case 'courseitem':
9ecd4386 1624 $stredit = get_string('editverbose', 'grades', $strparams);
6cc3e350 1625 if (empty($object->outcomeid) || empty($CFG->enableoutcomes)) {
a6855934 1626 $url = new moodle_url('/grade/edit/tree/item.php',
1c1f64a2 1627 array('courseid' => $this->courseid, 'id' => $object->id));
6cc3e350 1628 } else {
a6855934 1629 $url = new moodle_url('/grade/edit/tree/outcomeitem.php',
1c1f64a2 1630 array('courseid' => $this->courseid, 'id' => $object->id));
6cc3e350 1631 }
6cc3e350 1632 break;
1633
1634 case 'category':
9ecd4386 1635 $stredit = get_string('editverbose', 'grades', $strparams);
a6855934 1636 $url = new moodle_url('/grade/edit/tree/category.php',
1c1f64a2 1637 array('courseid' => $this->courseid, 'id' => $object->id));
6cc3e350 1638 break;
1639
1640 case 'grade':
05aba805 1641 $stredit = $streditgrade;
6cc3e350 1642 if (empty($object->id)) {
a6855934 1643 $url = new moodle_url('/grade/edit/tree/grade.php',
1c1f64a2 1644 array('courseid' => $this->courseid, 'itemid' => $object->itemid, 'userid' => $object->userid));
6cc3e350 1645 } else {
a6855934 1646 $url = new moodle_url('/grade/edit/tree/grade.php',
1c1f64a2 1647 array('courseid' => $this->courseid, 'id' => $object->id));
6cc3e350 1648 }
6cc3e350 1649 if (!empty($object->feedback)) {
1650 $feedback = addslashes_js(trim(format_string($object->feedback, $object->feedbackformat)));
6cc3e350 1651 }
1652 break;
1653
1654 default:
1655 $url = null;
1656 }
1657
1658 if ($url) {
c63923bd 1659 return $OUTPUT->action_icon($gpr->add_url_params($url), new pix_icon('t/edit', $stredit));
6cc3e350 1660
1661 } else {
1662 return '';
1663 }
1664 }
1665
1666 /**
1667 * Return hiding icon for give element
cf72e2dd 1668 *
1669 * @param array $element An array representing an element in the grade_tree
1670 * @param object $gpr A grade_plugin_return object
1671 *
6cc3e350 1672 * @return string
1673 */
d24832f9 1674 public function get_hiding_icon($element, $gpr) {
5d3b9994 1675 global $CFG, $OUTPUT;
6cc3e350 1676
39873128
TH
1677 if (!$element['object']->can_control_visibility()) {
1678 return '';
1679 }
1680
cf72e2dd 1681 if (!has_capability('moodle/grade:manage', $this->context) and
1682 !has_capability('moodle/grade:hide', $this->context)) {
6cc3e350 1683 return '';
1684 }
1685
345674ca 1686 $strparams = $this->get_params_for_iconstr($element);
9ecd4386 1687 $strshow = get_string('showverbose', 'grades', $strparams);
345674ca 1688 $strhide = get_string('hideverbose', 'grades', $strparams);
6cc3e350 1689
a6855934 1690 $url = new moodle_url('/grade/edit/tree/action.php', array('id' => $this->courseid, 'sesskey' => sesskey(), 'eid' => $element['eid']));
8ae8bf8a 1691 $url = $gpr->add_url_params($url);
1c1f64a2 1692
6cc3e350 1693 if ($element['object']->is_hidden()) {
8ae8bf8a 1694 $type = 'show';
6cc3e350 1695 $tooltip = $strshow;
1696
cf72e2dd 1697 // Change the icon and add a tooltip showing the date
1698 if ($element['type'] != 'category' and $element['object']->get_hidden() > 1) {
8ae8bf8a 1699 $type = 'hiddenuntil';
cf72e2dd 1700 $tooltip = get_string('hiddenuntildate', 'grades',
1701 userdate($element['object']->get_hidden()));
6cc3e350 1702 }
1703
8ae8bf8a 1704 $url->param('action', 'show');
b9cc756e 1705
a377cc53 1706 $hideicon = $OUTPUT->action_icon($url, new pix_icon('t/'.$type, $tooltip, 'moodle', array('alt'=>$strshow, 'class'=>'smallicon')));
6cc3e350 1707
1708 } else {
8ae8bf8a 1709 $url->param('action', 'hide');
c63923bd 1710 $hideicon = $OUTPUT->action_icon($url, new pix_icon('t/hide', $strhide));
6cc3e350 1711 }
1c1f64a2 1712
8ae8bf8a 1713 return $hideicon;
6cc3e350 1714 }
1715
1716 /**
2673c733 1717 * Return locking icon for given element
cf72e2dd 1718 *
1719 * @param array $element An array representing an element in the grade_tree
1720 * @param object $gpr A grade_plugin_return object
1721 *
6cc3e350 1722 * @return string
1723 */
d24832f9 1724 public function get_locking_icon($element, $gpr) {
6b608f8f 1725 global $CFG, $OUTPUT;
6cc3e350 1726
345674ca 1727 $strparams = $this->get_params_for_iconstr($element);
9ecd4386 1728 $strunlock = get_string('unlockverbose', 'grades', $strparams);
1729 $strlock = get_string('lockverbose', 'grades', $strparams);
d24832f9 1730
a6855934 1731 $url = new moodle_url('/grade/edit/tree/action.php', array('id' => $this->courseid, 'sesskey' => sesskey(), 'eid' => $element['eid']));
8ae8bf8a 1732 $url = $gpr->add_url_params($url);
1c1f64a2 1733
2673c733 1734 // Don't allow an unlocking action for a grade whose grade item is locked: just print a state icon
1735 if ($element['type'] == 'grade' && $element['object']->grade_item->is_locked()) {
1736 $strparamobj = new stdClass();
1737 $strparamobj->itemname = $element['object']->grade_item->itemname;
1738 $strnonunlockable = get_string('nonunlockableverbose', 'grades', $strparamobj);
1c1f64a2 1739
0cddd851
FM
1740 $action = html_writer::tag('span', $OUTPUT->pix_icon('t/locked', $strnonunlockable),
1741 array('class' => 'action-icon'));
8ae8bf8a 1742
cf72e2dd 1743 } else if ($element['object']->is_locked()) {
8ae8bf8a 1744 $type = 'unlock';
6cc3e350 1745 $tooltip = $strunlock;
1746
cf72e2dd 1747 // Change the icon and add a tooltip showing the date
1748 if ($element['type'] != 'category' and $element['object']->get_locktime() > 1) {
8ae8bf8a 1749 $type = 'locktime';
cf72e2dd 1750 $tooltip = get_string('locktimedate', 'grades',
1751 userdate($element['object']->get_locktime()));
6cc3e350 1752 }
1753
8ae8bf8a
PS
1754 if (!has_capability('moodle/grade:manage', $this->context) and !has_capability('moodle/grade:unlock', $this->context)) {
1755 $action = '';
1756 } else {
1757 $url->param('action', 'unlock');
c63923bd 1758 $action = $OUTPUT->action_icon($url, new pix_icon('t/'.$type, $tooltip, 'moodle', array('alt'=>$strunlock, 'class'=>'smallicon')));
6cc3e350 1759 }
6cc3e350 1760
1761 } else {
8ae8bf8a
PS
1762 if (!has_capability('moodle/grade:manage', $this->context) and !has_capability('moodle/grade:lock', $this->context)) {
1763 $action = '';
1764 } else {
1765 $url->param('action', 'lock');
c63923bd 1766 $action = $OUTPUT->action_icon($url, new pix_icon('t/lock', $strlock));
6cc3e350 1767 }
6cc3e350 1768 }
8ae8bf8a 1769
6cc3e350 1770 return $action;
1771 }
1772
1773 /**
1774 * Return calculation icon for given element
cf72e2dd 1775 *
1776 * @param array $element An array representing an element in the grade_tree
1777 * @param object $gpr A grade_plugin_return object
1778 *
6cc3e350 1779 * @return string
1780 */
d24832f9 1781 public function get_calculation_icon($element, $gpr) {
666e8458 1782 global $CFG, $OUTPUT;
6cc3e350 1783 if (!has_capability('moodle/grade:manage', $this->context)) {
1784 return '';
1785 }
1786
6cc3e350 1787 $type = $element['type'];
1788 $object = $element['object'];
1789
1790 if ($type == 'item' or $type == 'courseitem' or $type == 'categoryitem') {
345674ca 1791 $strparams = $this->get_params_for_iconstr($element);
9ecd4386 1792 $streditcalculation = get_string('editcalculationverbose', 'grades', $strparams);
6cc3e350 1793
cf72e2dd 1794 $is_scale = $object->gradetype == GRADE_TYPE_SCALE;
1795 $is_value = $object->gradetype == GRADE_TYPE_VALUE;
1796
6cc3e350 1797 // show calculation icon only when calculation possible
cf72e2dd 1798 if (!$object->is_external_item() and ($is_scale or $is_value)) {
6cc3e350 1799 if ($object->is_calculated()) {
666e8458 1800 $icon = 't/calc';
6cc3e350 1801 } else {
666e8458 1802 $icon = 't/calc_off';
6cc3e350 1803 }
cf72e2dd 1804
a6855934 1805 $url = new moodle_url('/grade/edit/tree/calculation.php', array('courseid' => $this->courseid, 'id' => $object->id));
8ae8bf8a 1806 $url = $gpr->add_url_params($url);
0cddd851 1807 return $OUTPUT->action_icon($url, new pix_icon($icon, $streditcalculation));
6cc3e350 1808 }
1809 }
1810
1c1f64a2 1811 return '';
6cc3e350 1812 }
1813}
1814
1815/**
1816 * Flat structure similar to grade tree.
cf72e2dd 1817 *
1818 * @uses grade_structure
a153c9f2 1819 * @package core_grades
cf72e2dd 1820 * @copyright 2009 Nicolas Connault
1821 * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
6cc3e350 1822 */
1823class grade_seq extends grade_structure {
1824
6cc3e350 1825 /**
1826 * 1D array of elements
1827 */
d24832f9 1828 public $elements;
e98871a2 1829
1830 /**
1831 * Constructor, retrieves and stores array of all grade_category and grade_item
1832 * objects for the given courseid. Full objects are instantiated. Ordering sequence is fixed if needed.
cf72e2dd 1833 *
1834 * @param int $courseid The course id
1835 * @param bool $category_grade_last category grade item is the last child
1836 * @param bool $nooutcomes Whether or not outcomes should be included
e98871a2 1837 */
d24832f9 1838 public function grade_seq($courseid, $category_grade_last=false, $nooutcomes=false) {
e98871a2 1839 global $USER, $CFG;
1840
1841 $this->courseid = $courseid;
d4060472 1842 $this->context = context_course::instance($courseid);
e98871a2 1843
1844 // get course grade tree
1845 $top_element = grade_category::fetch_course_tree($courseid, true);
1846
6391ebe7 1847 $this->elements = grade_seq::flatten($top_element, $category_grade_last, $nooutcomes);
1848
1849 foreach ($this->elements as $key=>$unused) {
b89a70ce 1850 $this->items[$this->elements[$key]['object']->id] =& $this->elements[$key]['object'];
6391ebe7 1851 }
e98871a2 1852 }
1853
1854 /**
1855 * Static recursive helper - makes the grade_item for category the last children
cf72e2dd 1856 *
1857 * @param array &$element The seed of the recursion
1858 * @param bool $category_grade_last category grade item is the last child
1859 * @param bool $nooutcomes Whether or not outcomes should be included
1860 *
1861 * @return array
e98871a2 1862 */
d24832f9 1863 public function flatten(&$element, $category_grade_last, $nooutcomes) {
e98871a2 1864 if (empty($element['children'])) {
1865 return array();
1866 }
1867 $children = array();
1868
1869 foreach ($element['children'] as $sortorder=>$unused) {
cf72e2dd 1870 if ($nooutcomes and $element['type'] != 'category' and
1871 $element['children'][$sortorder]['object']->is_outcome_item()) {
e98871a2 1872 continue;
1873 }
1874 $children[] = $element['children'][$sortorder];
1875 }
1876 unset($element['children']);
1877
1878 if ($category_grade_last and count($children) > 1) {
1879 $cat_item = array_shift($children);
1880 array_push($children, $cat_item);
1881 }
1882
1883 $result = array();
1884 foreach ($children as $child) {
e0724506 1885 if ($child['type'] == 'category') {
6391ebe7 1886 $result = $result + grade_seq::flatten($child, $category_grade_last, $nooutcomes);
e98871a2 1887 } else {
1888 $child['eid'] = 'i'.$child['object']->id;
6391ebe7 1889 $result[$child['object']->id] = $child;
e98871a2 1890 }
1891 }
1892
1893 return $result;
1894 }
1895
1896 /**
1897 * Parses the array in search of a given eid and returns a element object with
1898 * information about the element it has found.
cf72e2dd 1899 *
1900 * @param int $eid Gradetree Element ID
1901 *
e98871a2 1902 * @return object element
1903 */
d24832f9 1904 public function locate_element($eid) {
e98871a2 1905 // it is a grade - construct a new object
1906 if (strpos($eid, 'n') === 0) {
1907 if (!preg_match('/n(\d+)u(\d+)/', $eid, $matches)) {
1908 return null;
1909 }
1910
1911 $itemid = $matches[1];
1912 $userid = $matches[2];
1913
1914 //extra security check - the grade item must be in this tree
ddb9c95f 1915 if (!$item_el = $this->locate_element('ig'.$itemid)) {
e98871a2 1916 return null;
1917 }
1918
1919 // $gradea->id may be null - means does not exist yet
1920 $grade = new grade_grade(array('itemid'=>$itemid, 'userid'=>$userid));
1921
1922 $grade->grade_item =& $item_el['object']; // this may speedup grade_grade methods!
1923 return array('eid'=>'n'.$itemid.'u'.$userid,'object'=>$grade, 'type'=>'grade');
1924
1925 } else if (strpos($eid, 'g') === 0) {
cf72e2dd 1926 $id = (int) substr($eid, 1);
e98871a2 1927 if (!$grade = grade_grade::fetch(array('id'=>$id))) {
1928 return null;
1929 }
1930 //extra security check - the grade item must be in this tree
ddb9c95f 1931 if (!$item_el = $this->locate_element('ig'.$grade->itemid)) {
e98871a2 1932 return null;
1933 }
1934 $grade->grade_item =& $item_el['object']; // this may speedup grade_grade methods!
1935 return array('eid'=>'g'.$id,'object'=>$grade, 'type'=>'grade');
1936 }
1937
1938 // it is a category or item
6391ebe7 1939 foreach ($this->elements as $element) {
6cc3e350 1940 if ($element['eid'] == $eid) {
1941 return $element;
1942 }
e98871a2 1943 }
6cc3e350 1944
1945 return null;
e98871a2 1946 }
e98871a2 1947}
1948
7a6b7acf 1949/**
1950 * This class represents a complete tree of categories, grade_items and final grades,
1951 * organises as an array primarily, but which can also be converted to other formats.
1952 * It has simple method calls with complex implementations, allowing for easy insertion,
1953 * deletion and moving of items and categories within the tree.
cf72e2dd 1954 *
1955 * @uses grade_structure
a153c9f2 1956 * @package core_grades
cf72e2dd 1957 * @copyright 2009 Nicolas Connault
1958 * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
7a6b7acf 1959 */
6cc3e350 1960class grade_tree extends grade_structure {
7a6b7acf 1961
1962 /**
1963 * The basic representation of the tree as a hierarchical, 3-tiered array.
1964 * @var object $top_element
1965 */
d24832f9 1966 public $top_element;
7a6b7acf 1967
7a6b7acf 1968 /**
1969 * 2D array of grade items and categories
cf72e2dd 1970 * @var array $levels
7a6b7acf 1971 */
d24832f9 1972 public $levels;
7a6b7acf 1973
b89a70ce 1974 /**
1975 * Grade items
cf72e2dd 1976 * @var array $items
b89a70ce 1977 */
d24832f9 1978 public $items;
b89a70ce 1979
7a6b7acf 1980 /**
1981 * Constructor, retrieves and stores a hierarchical array of all grade_category and grade_item
e98871a2 1982 * objects for the given courseid. Full objects are instantiated. Ordering sequence is fixed if needed.
cf72e2dd 1983 *
1984 * @param int $courseid The Course ID
1985 * @param bool $fillers include fillers and colspans, make the levels var "rectangular"
1986 * @param bool $category_grade_last category grade item is the last child
4faf5f99 1987 * @param array $collapsed array of collapsed categories
cf72e2dd 1988 * @param bool $nooutcomes Whether or not outcomes should be included
7a6b7acf 1989 */
cf72e2dd 1990 public function grade_tree($courseid, $fillers=true, $category_grade_last=false,
1991 $collapsed=null, $nooutcomes=false) {
73ca5f01 1992 global $USER, $CFG, $COURSE, $DB;
7a6b7acf 1993
1994 $this->courseid = $courseid;
7a6b7acf 1995 $this->levels = array();
d4060472 1996 $this->context = context_course::instance($courseid);
7a6b7acf 1997
73ca5f01 1998 if (!empty($COURSE->id) && $COURSE->id == $this->courseid) {
1999 $course = $COURSE;
2000 } else {
2001 $course = $DB->get_record('course', array('id' => $this->courseid));
2002 }
2003 $this->modinfo = get_fast_modinfo($course);
2004
7a6b7acf 2005 // get course grade tree
2006 $this->top_element = grade_category::fetch_course_tree($courseid, true);
2007
4faf5f99 2008 // collapse the categories if requested
2009 if (!empty($collapsed)) {
2010 grade_tree::category_collapse($this->top_element, $collapsed);
2011 }
2012
aea4df41 2013 // no otucomes if requested
2014 if (!empty($nooutcomes)) {
2015 grade_tree::no_outcomes($this->top_element);
2016 }
2017
4faf5f99 2018 // move category item to last position in category
7a6b7acf 2019 if ($category_grade_last) {
2020 grade_tree::category_grade_last($this->top_element);
2021 }
2022
2023 if ($fillers) {
2024 // inject fake categories == fillers
2025 grade_tree::inject_fillers($this->top_element, 0);
2026 // add colspans to categories and fillers
2027 grade_tree::inject_colspans($this->top_element);
2028 }
2029
2030 grade_tree::fill_levels($this->levels, $this->top_element, 0);
d297269d 2031
7a6b7acf 2032 }
2033
4faf5f99 2034 /**
2035 * Static recursive helper - removes items from collapsed categories
cf72e2dd 2036 *
2037 * @param array &$element The seed of the recursion
4faf5f99 2038 * @param array $collapsed array of collapsed categories
cf72e2dd 2039 *
4faf5f99 2040 * @return void
2041 */
d24832f9 2042 public function category_collapse(&$element, $collapsed) {
4faf5f99 2043 if ($element['type'] != 'category') {
2044 return;
2045 }
2046 if (empty($element['children']) or count($element['children']) < 2) {
2047 return;
2048 }
2049
384960dd 2050 if (in_array($element['object']->id, $collapsed['aggregatesonly'])) {
4faf5f99 2051 $category_item = reset($element['children']); //keep only category item
2052 $element['children'] = array(key($element['children'])=>$category_item);
2053
2054 } else {
384960dd 2055 if (in_array($element['object']->id, $collapsed['gradesonly'])) { // Remove category item
2056 reset($element['children']);
2057 $first_key = key($element['children']);
2058 unset($element['children'][$first_key]);
2059 }
2060 foreach ($element['children'] as $sortorder=>$child) { // Recurse through the element's children
4faf5f99 2061 grade_tree::category_collapse($element['children'][$sortorder], $collapsed);
2062 }
2063 }
2064 }
7a6b7acf 2065
aea4df41 2066 /**
2067 * Static recursive helper - removes all outcomes
cf72e2dd 2068 *
2069 * @param array &$element The seed of the recursion
2070 *
aea4df41 2071 * @return void
2072 */
d24832f9 2073 public function no_outcomes(&$element) {
aea4df41 2074 if ($element['type'] != 'category') {
2075 return;
2076 }
2077 foreach ($element['children'] as $sortorder=>$child) {
2078 if ($element['children'][$sortorder]['type'] == 'item'
2079 and $element['children'][$sortorder]['object']->is_outcome_item()) {
2080 unset($element['children'][$sortorder]);
2081
d4795a07 2082 } else if ($element['children'][$sortorder]['type'] == 'category') {
aea4df41 2083 grade_tree::no_outcomes($element['children'][$sortorder]);
2084 }
2085 }
2086 }
2087
7a6b7acf 2088 /**
2089 * Static recursive helper - makes the grade_item for category the last children
cf72e2dd 2090 *
2091 * @param array &$element The seed of the recursion
2092 *
7a6b7acf 2093 * @return void
2094 */
d24832f9 2095 public function category_grade_last(&$element) {
7a6b7acf 2096 if (empty($element['children'])) {
2097 return;
2098 }
2099 if (count($element['children']) < 2) {
2100 return;
2101 }
3e0e2436 2102 $first_item = reset($element['children']);
4a3dfd9a 2103 if ($first_item['type'] == 'categoryitem' or $first_item['type'] == 'courseitem') {
3e0e2436 2104 // the category item might have been already removed
2105 $order = key($element['children']);
2106 unset($element['children'][$order]);
2107 $element['children'][$order] =& $first_item;
2108 }
206f9953 2109 foreach ($element['children'] as $sortorder => $child) {
7a6b7acf 2110 grade_tree::category_grade_last($element['children'][$sortorder]);
2111 }
2112 }
2113
2114 /**
2115 * Static recursive helper - fills the levels array, useful when accessing tree elements of one level
cf72e2dd 2116 *
2117 * @param array &$levels The levels of the grade tree through which to recurse
2118 * @param array &$element The seed of the recursion
2119 * @param int $depth How deep are we?
7a6b7acf 2120 * @return void
2121 */
d24832f9 2122 public function fill_levels(&$levels, &$element, $depth) {
7a6b7acf 2123 if (!array_key_exists($depth, $levels)) {
2124 $levels[$depth] = array();
2125 }
2126
2127 // prepare unique identifier
2128 if ($element['type'] == 'category') {
ddb9c95f 2129 $element['eid'] = 'cg'.$element['object']->id;
7a6b7acf 2130 } else if (in_array($element['type'], array('item', 'courseitem', 'categoryitem'))) {
ddb9c95f 2131 $element['eid'] = 'ig'.$element['object']->id;
b89a70ce 2132 $this->items[$element['object']->id] =& $element['object'];
7a6b7acf 2133 }
2134
2135 $levels[$depth][] =& $element;
2136 $depth++;
2137 if (empty($element['children'])) {
2138 return;
2139 }
2140 $prev = 0;
2141 foreach ($element['children'] as $sortorder=>$child) {
2142 grade_tree::fill_levels($levels, $element['children'][$sortorder], $depth);
2143 $element['children'][$sortorder]['prev'] = $prev;
2144 $element['children'][$sortorder]['next'] = 0;
2145 if ($prev) {
2146 $element['children'][$prev]['next'] = $sortorder;
2147 }
2148 $prev = $sortorder;
2149 }
2150 }
2151
2152 /**
2153 * Static recursive helper - makes full tree (all leafes are at the same level)
cf72e2dd 2154 *
2155 * @param array &$element The seed of the recursion
2156 * @param int $depth How deep are we?
2157 *
2158 * @return int
7a6b7acf 2159 */
d24832f9 2160 public function inject_fillers(&$element, $depth) {
7a6b7acf 2161 $depth++;
2162
2163 if (empty($element['children'])) {
2164 return $depth;
2165 }
2166 $chdepths = array();
2167 $chids = array_keys($element['children']);
2168 $last_child = end($chids);
2169 $first_child = reset($chids);
2170
2171 foreach ($chids as $chid) {
2172 $chdepths[$chid] = grade_tree::inject_fillers($element['children'][$chid], $depth);
2173 }
2174 arsort($chdepths);
2175
2176 $maxdepth = reset($chdepths);
2177 foreach ($chdepths as $chid=>$chd) {
2178 if ($chd == $maxdepth) {
2179 continue;
2180 }
2181 for ($i=0; $i < $maxdepth-$chd; $i++) {
2182 if ($chid == $first_child) {
2183 $type = 'fillerfirst';
2184 } else if ($chid == $last_child) {
2185 $type = 'fillerlast';
2186 } else {
2187 $type = 'filler';
2188 }
2189 $oldchild =& $element['children'][$chid];
cf72e2dd 2190 $element['children'][$chid] = array('object'=>'filler', 'type'=>$type,
2191 'eid'=>'', 'depth'=>$element['object']->depth,
2192 'children'=>array($oldchild));
7a6b7acf 2193 }
2194 }
2195
2196 return $maxdepth;
2197 }
2198
2199 /**
2200 * Static recursive helper - add colspan information into categories
cf72e2dd 2201 *
2202 * @param array &$element The seed of the recursion
2203 *
2204 * @return int
7a6b7acf 2205 */
d24832f9 2206 public function inject_colspans(&$element) {
7a6b7acf 2207 if (empty($element['children'])) {
2208 return 1;
2209 }
2210 $count = 0;
2211 foreach ($element['children'] as $key=>$child) {
2212 $count += grade_tree::inject_colspans($element['children'][$key]);
2213 }
2214 $element['colspan'] = $count;
2215 return $count;
2216 }
2217
2218 /**
2219 * Parses the array in search of a given eid and returns a element object with
2220 * information about the element it has found.
cf72e2dd 2221 * @param int $eid Gradetree Element ID
7a6b7acf 2222 * @return object element
2223 */
d24832f9 2224 public function locate_element($eid) {
d3c3da1b 2225 // it is a grade - construct a new object
2226 if (strpos($eid, 'n') === 0) {
2227 if (!preg_match('/n(\d+)u(\d+)/', $eid, $matches)) {
2228 return null;
2229 }
2230
2231 $itemid = $matches[1];
2232 $userid = $matches[2];
2233
2234 //extra security check - the grade item must be in this tree
ddb9c95f 2235 if (!$item_el = $this->locate_element('ig'.$itemid)) {
d3c3da1b 2236 return null;
2237 }
2238
2239 // $gradea->id may be null - means does not exist yet
2240 $grade = new grade_grade(array('itemid'=>$itemid, 'userid'=>$userid));
2241
2242 $grade->grade_item =& $item_el['object']; // this may speedup grade_grade methods!
2243 return array('eid'=>'n'.$itemid.'u'.$userid,'object'=>$grade, 'type'=>'grade');
2244
2245 } else if (strpos($eid, 'g') === 0) {
cf72e2dd 2246 $id = (int) substr($eid, 1);
7a6b7acf 2247 if (!$grade = grade_grade::fetch(array('id'=>$id))) {
2248 return null;
2249 }
2250 //extra security check - the grade item must be in this tree
ddb9c95f 2251 if (!$item_el = $this->locate_element('ig'.$grade->itemid)) {
7a6b7acf 2252 return null;
2253 }
2254 $grade->grade_item =& $item_el['object']; // this may speedup grade_grade methods!
2255 return array('eid'=>'g'.$id,'object'=>$grade, 'type'=>'grade');
2256 }
2257
2258 // it is a category or item
2259 foreach ($this->levels as $row) {
2260 foreach ($row as $element) {
2261 if ($element['type'] == 'filler') {
2262 continue;
2263 }
2264 if ($element['eid'] == $eid) {
2265 return $element;
2266 }
2267 }
2268 }
2269
2270 return null;
2271 }
d24832f9 2272
b244b9b7 2273 /**
2274 * Returns a well-formed XML representation of the grade-tree using recursion.
cf72e2dd 2275 *
2276 * @param array $root The current element in the recursion. If null, starts at the top of the tree.
2277 * @param string $tabs The control character to use for tabs
2278 *
b244b9b7 2279 * @return string $xml
2280 */
cf72e2dd 2281 public function exporttoxml($root=null, $tabs="\t") {
b244b9b7 2282 $xml = null;
2283 $first = false;
2284 if (is_null($root)) {
2285 $root = $this->top_element;
2286 $xml = '<?xml version="1.0" encoding="UTF-8" ?>' . "\n";
2287 $xml .= "<gradetree>\n";
2288 $first = true;
2289 }
d24832f9 2290
b244b9b7 2291 $type = 'undefined';
2292 if (strpos($root['object']->table, 'grade_categories') !== false) {
2293 $type = 'category';
cf72e2dd 2294 } else if (strpos($root['object']->table, 'grade_items') !== false) {
b244b9b7 2295 $type = 'item';
cf72e2dd 2296 } else if (strpos($root['object']->table, 'grade_outcomes') !== false) {
b244b9b7 2297 $type = 'outcome';
2298 }
d24832f9 2299
b244b9b7 2300 $xml .= "$tabs<element type=\"$type\">\n";
2301 foreach ($root['object'] as $var => $value) {
2302 if (!is_object($value) && !is_array($value) && !empty($value)) {
2303 $xml .= "$tabs\t<$var>$value</$var>\n";
2304 }
2305 }
2306
2307 if (!empty($root['children'])) {
2308 $xml .= "$tabs\t<children>\n";
2309 foreach ($root['children'] as $sortorder => $child) {
2310 $xml .= $this->exportToXML($child, $tabs."\t\t");
2311 }
2312 $xml .= "$tabs\t</children>\n";
2313 }
d24832f9 2314
b244b9b7 2315 $xml .= "$tabs</element>\n";
2316
2317 if ($first) {
2318 $xml .= "</gradetree>";
2319 }
d24832f9 2320
b244b9b7 2321 return $xml;
2322 }
d24832f9 2323
b244b9b7 2324 /**
2325 * Returns a JSON representation of the grade-tree using recursion.
cf72e2dd 2326 *
b244b9b7 2327 * @param array $root The current element in the recursion. If null, starts at the top of the tree.
2328 * @param string $tabs Tab characters used to indent the string nicely for humans to enjoy
cf72e2dd 2329 *
2330 * @return string
b244b9b7 2331 */
cf72e2dd 2332 public function exporttojson($root=null, $tabs="\t") {
b244b9b7 2333 $json = null;
2334 $first = false;
2335 if (is_null($root)) {
2336 $root = $this->top_element;
2337 $first = true;
2338 }
d24832f9 2339
b244b9b7 2340 $name = '';
2341
2342
2343 if (strpos($root['object']->table, 'grade_categories') !== false) {
2344 $name = $root['object']->fullname;
2345 if ($name == '?') {
d24832f9 2346 $name = $root['object']->get_name();
b244b9b7 2347 }
cf72e2dd 2348 } else if (strpos($root['object']->table, 'grade_items') !== false) {
b244b9b7 2349 $name = $root['object']->itemname;
cf72e2dd 2350 } else if (strpos($root['object']->table, 'grade_outcomes') !== false) {
b244b9b7 2351 $name = $root['object']->itemname;
2352 }
d24832f9 2353
b244b9b7 2354 $json .= "$tabs {\n";
2355 $json .= "$tabs\t \"type\": \"{$root['type']}\",\n";
2356 $json .= "$tabs\t \"name\": \"$name\",\n";
2357
2358 foreach ($root['object'] as $var => $value) {
2359 if (!is_object($value) && !is_array($value) && !empty($value)) {
2360 $json .= "$tabs\t \"$var\": \"$value\",\n";
2361 }
2362 }
d24832f9 2363
b244b9b7 2364 $json = substr($json, 0, strrpos($json, ','));
d24832f9 2365
b244b9b7 2366 if (!empty($root['children'])) {
2367 $json .= ",\n$tabs\t\"children\": [\n";
2368 foreach ($root['children'] as $sortorder => $child) {
2369 $json .= $this->exportToJSON($child, $tabs."\t\t");
2370 }
2371 $json = substr($json, 0, strrpos($json, ','));
2372 $json .= "\n$tabs\t]\n";
d24832f9 2373 }
b244b9b7 2374
2375 if ($first) {
2376 $json .= "\n}";
2377 } else {
2378 $json .= "\n$tabs},\n";
2379 }
d24832f9 2380
b244b9b7 2381 return $json;
2382 }
d24832f9 2383
cf72e2dd 2384 /**
2385 * Returns the array of levels
2386 *
2387 * @return array
2388 */
d24832f9 2389 public function get_levels() {
2390 return $this->levels;
2391 }
2392
cf72e2dd 2393 /**
2394 * Returns the array of grade items
2395 *
2396 * @return array
2397 */
d24832f9 2398 public function get_items() {
2399 return $this->items;
2400 }
2401
cf72e2dd 2402 /**
2403 * Returns a specific Grade Item
2404 *
2405 * @param int $itemid The ID of the grade_item object
2406 *
2407 * @return grade_item
2408 */
d24832f9 2409 public function get_item($itemid) {
2410 if (array_key_exists($itemid, $this->items)) {
2411 return $this->items[$itemid];
2412 } else {
2413 return false;
2414 }
2415 }
7a6b7acf 2416}
eef00ade 2417
2418/**
2419 * Local shortcut function for creating an edit/delete button for a grade_* object.
4d27bc79 2420 * @param string $type 'edit' or 'delete'
eef00ade 2421 * @param int $courseid The Course ID
2422 * @param grade_* $object The grade_* object
2423 * @return string html
2424 */
2425function grade_button($type, $courseid, $object) {
2426 global $CFG, $OUTPUT;
2427 if (preg_match('/grade_(.*)/', get_class($object), $matches)) {
2428 $objectidstring = $matches[1] . 'id';
2429 } else {
2430 throw new coding_exception('grade_button() only accepts grade_* objects as third parameter!');
2431 }
2432
2433 $strdelete = get_string('delete');
2434 $stredit = get_string('edit');
2435
eef00ade 2436 if ($type == 'delete') {
8ae8bf8a 2437 $url = new moodle_url('index.php', array('id' => $courseid, $objectidstring => $object->id, 'action' => 'delete', 'sesskey' => sesskey()));
eef00ade 2438 } else if ($type == 'edit') {
8ae8bf8a 2439 $url = new moodle_url('edit.php', array('courseid' => $courseid, 'id' => $object->id));
eef00ade 2440 }
2441
fa9c0aab 2442 return $OUTPUT->action_icon($url, new pix_icon('t/'.$type, ${'str'.$type}, '', array('class' => 'iconsmall')));
eef00ade 2443
2444}
4d5059d4
SH
2445
2446/**
2447 * This method adds settings to the settings block for the grade system and its
2448 * plugins
2449 *
2450 * @global moodle_page $PAGE
2451 */
2452function grade_extend_settings($plugininfo, $courseid) {
2453 global $PAGE;
2454
2455 $gradenode = $PAGE->settingsnav->prepend(get_string('gradeadministration', 'grades'), null, navigation_node::TYPE_CONTAINER);
2456
2457 $strings = array_shift($plugininfo);
2458
2459 if ($reports = grade_helper::get_plugins_reports($courseid)) {
2460 foreach ($reports as $report) {
2461 $gradenode->add($report->string, $report->link, navigation_node::TYPE_SETTING, null, $report->id, new pix_icon('i/report', ''));
2462 }
2463 }
2464
eb84b779
MG
2465 if ($settings = grade_helper::get_info_manage_settings($courseid)) {
2466 $settingsnode = $gradenode->add($strings['settings'], null, navigation_node::TYPE_CONTAINER);
2467 foreach ($settings as $setting) {
2468 $settingsnode->add($setting->string, $setting->link, navigation_node::TYPE_SETTING, null, $setting->id, new pix_icon('i/settings', ''));
2469 }
2470 }
2471
4d5059d4
SH
2472 if ($imports = grade_helper::get_plugins_import($courseid)) {
2473 $importnode = $gradenode->add($strings['import'], null, navigation_node::TYPE_CONTAINER);
2474 foreach ($imports as $import) {
11f87187 2475 $importnode->add($import->string, $import->link, navigation_node::TYPE_SETTING, null, $import->id, new pix_icon('i/import', ''));
4d5059d4
SH
2476 }
2477 }
2478
2479 if ($exports = grade_helper::get_plugins_export($courseid)) {
2480 $exportnode = $gradenode->add($strings['export'], null, navigation_node::TYPE_CONTAINER);
2481 foreach ($exports as $export) {
11f87187 2482 $exportnode->add($export->string, $export->link, navigation_node::TYPE_SETTING, null, $export->id, new pix_icon('i/export', ''));
4d5059d4
SH
2483 }
2484 }
2485
4d5059d4
SH
2486 if ($letters = grade_helper::get_info_letters($courseid)) {
2487 $letters = array_shift($letters);
2488 $gradenode->add($strings['letter'], $letters->link, navigation_node::TYPE_SETTING, null, $letters->id, new pix_icon('i/settings', ''));
2489 }
2490
2491 if ($outcomes = grade_helper::get_info_outcomes($courseid)) {
2492 $outcomes = array_shift($outcomes);
2493 $gradenode->add($strings['outcome'], $outcomes->link, navigation_node::TYPE_SETTING, null, $outcomes->id, new pix_icon('i/outcomes', ''));
2494 }
2495
2496 if ($scales = grade_helper::get_info_scales($courseid)) {
2497 $gradenode->add($strings['scale'], $scales->link, navigation_node::TYPE_SETTING, null, $scales->id, new pix_icon('i/scales', ''));
2498 }
2499
4d5059d4
SH
2500 if ($gradenode->contains_active_node()) {
2501 // If the gradenode is active include the settings base node (gradeadministration) in
2502 // the navbar, typcially this is ignored.
2503 $PAGE->navbar->includesettingsbase = true;
2504
2505 // If we can get the course admin node make sure it is closed by default
2506 // as in this case the gradenode will be opened
2507 if ($coursenode = $PAGE->settingsnav->get('courseadmin', navigation_node::TYPE_COURSE)){
2508 $coursenode->make_inactive();
2509 $coursenode->forceopen = false;
2510 }
2511 }
2512}
2513
2514/**
2515 * Grade helper class
2516 *
2517 * This class provides several helpful functions that work irrespective of any
2518 * current state.
2519 *
2520 * @copyright 2010 Sam Hemelryk
2521 * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
2522 */
2523abstract class grade_helper {
2524 /**
2525 * Cached manage settings info {@see get_info_settings}
2526 * @var grade_plugin_info|false
2527 */
2528 protected static $managesetting = null;
2529 /**
2530 * Cached grade report plugins {@see get_plugins_reports}
2531 * @var array|false
2532 */
2533 protected static $gradereports = null;
2534 /**
2535 * Cached grade report plugins preferences {@see get_info_scales}
2536 * @var array|false
2537 */
2538 protected static $gradereportpreferences = null;
2539 /**
2540 * Cached scale info {@see get_info_scales}
2541 * @var grade_plugin_info|false
2542 */
2543 protected static $scaleinfo = null;
2544 /**
2545 * Cached outcome info {@see get_info_outcomes}
2546 * @var grade_plugin_info|false
2547 */
2548 protected static $outcomeinfo = null;
4d5059d4
SH
2549 /**
2550 * Cached leftter info {@see get_info_letters}
2551 * @var grade_plugin_info|false
2552 */
2553 protected static $letterinfo = null;
2554 /**
2555 * Cached grade import plugins {@see get_plugins_import}
2556 * @var array|false
2557 */
2558 protected static $importplugins = null;
2559 /**
2560 * Cached grade export plugins {@see get_plugins_export}
2561 * @var array|false
2562 */
2563 protected static $exportplugins = null;
2564 /**
2565 * Cached grade plugin strings
2566 * @var array
2567 */
2568 protected static $pluginstrings = null;
bfe969e8
DW
2569 /**
2570 * Cached grade aggregation strings
2571 * @var array
2572 */
2573 protected static $aggregationstrings = null;
4d5059d4
SH
2574
2575 /**
2576 * Gets strings commonly used by the describe plugins
2577 *
2578 * report => get_string('view'),
4d5059d4
SH
2579 * scale => get_string('scales'),
2580 * outcome => get_string('outcomes', 'grades'),
2581 * letter => get_string('letters', 'grades'),
2582 * export => get_string('export', 'grades'),
2583 * import => get_string('import'),
2584 * preferences => get_string('mypreferences', 'grades'),
2585 * settings => get_string('settings')
2586 *
2587 * @return array
2588 */
2589 public static function get_plugin_strings() {
2590 if (self::$pluginstrings === null) {
2591 self::$pluginstrings = array(
2592 'report' => get_string('view'),
4d5059d4
SH
2593 'scale' => get_string('scales'),
2594 'outcome' => get_string('outcomes', 'grades'),
2595 'letter' => get_string('letters', 'grades'),
2596 'export' => get_string('export', 'grades'),
2597 'import' => get_string('import'),
eb84b779 2598 'settings' => get_string('edittree', 'grades')
4d5059d4
SH
2599 );
2600 }
2601 return self::$pluginstrings;
2602 }
bfe969e8
DW
2603
2604 /**
2605 * Gets strings describing the available aggregation methods.
2606 *
2607 * @return array
2608 */
2609 public static function get_aggregation_strings() {
2610 if (self::$aggregationstrings === null) {
2611 self::$aggregationstrings = array(
2612 GRADE_AGGREGATE_MEAN => get_string('aggregatemean', 'grades'),
2613 GRADE_AGGREGATE_WEIGHTED_MEAN => get_string('aggregateweightedmean', 'grades'),
2614 GRADE_AGGREGATE_WEIGHTED_MEAN2 => get_string('aggregateweightedmean2', 'grades'),
2615 GRADE_AGGREGATE_EXTRACREDIT_MEAN => get_string('aggregateextracreditmean', 'grades'),
2616 GRADE_AGGREGATE_MEDIAN => get_string('aggregatemedian', 'grades'),
2617 GRADE_AGGREGATE_MIN => get_string('aggregatemin', 'grades'),
2618 GRADE_AGGREGATE_MAX => get_string('aggregatemax', 'grades'),
2619 GRADE_AGGREGATE_MODE => get_string('aggregatemode', 'grades'),
2620 GRADE_AGGREGATE_SUM => get_string('aggregatesum', 'grades')
2621 );
2622 }
2623 return self::$aggregationstrings;
2624 }
2625
4d5059d4
SH
2626 /**
2627 * Get grade_plugin_info object for managing settings if the user can
2628 *
2629 * @param int $courseid
8faa560c 2630 * @return grade_plugin_info[]
4d5059d4
SH
2631 */
2632 public static function get_info_manage_settings($courseid) {
2633 if (self::$managesetting !== null) {
2634 return self::$managesetting;
2635 }
d4060472 2636 $context = context_course::instance($courseid);
8faa560c
MG
2637 self::$managesetting = array();
2638 if ($courseid != SITEID && has_capability('moodle/grade:manage', $context)) {
eb84b779
MG
2639 self::$managesetting['categoriesanditems'] = new grade_plugin_info('setup',
2640 new moodle_url('/grade/edit/tree/index.php', array('id' => $courseid)),
2641 get_string('categoriesanditems', 'grades'));
8faa560c
MG
2642 self::$managesetting['coursesettings'] = new grade_plugin_info('coursesettings',
2643 new moodle_url('/grade/edit/settings/index.php', array('id'=>$courseid)),
2644 get_string('coursegradesettings', 'grades'));
eb84b779
MG
2645 }
2646 if (self::$gradereportpreferences === null) {
2647 self::get_plugins_reports($courseid);
2648 }
2649 if (self::$gradereportpreferences) {
2650 self::$managesetting = array_merge(self::$managesetting, self::$gradereportpreferences);
4d5059d4
SH
2651 }
2652 return self::$managesetting;
2653 }
2654 /**
2655 * Returns an array of plugin reports as grade_plugin_info objects
2656 *
2657 * @param int $courseid
2658 * @return array
2659 */
2660 public static function get_plugins_reports($courseid) {
f7fcf4cd 2661 global $SITE;
cf717dc2 2662
4d5059d4
SH
2663 if (self::$gradereports !== null) {
2664 return self::$gradereports;
2665 }
d4060472 2666 $context = context_course::instance($courseid);
4d5059d4
SH
2667 $gradereports = array();
2668 $gradepreferences = array();
bd3b3bba 2669 foreach (core_component::get_plugin_list('gradereport') as $plugin => $plugindir) {
f7fcf4cd
AD
2670 //some reports make no sense if we're not within a course
2671 if ($courseid==$SITE->id && ($plugin=='grader' || $plugin=='user')) {
2672 continue;
2673 }
2674
4d5059d4
SH
2675 // Remove ones we can't see
2676 if (!has_capability('gradereport/'.$plugin.':view', $context)) {
2677 continue;
2678 }
2679
b5e7b2bf 2680 $pluginstr = get_string('pluginname', 'gradereport_'.$plugin);
4d5059d4
SH
2681 $url = new moodle_url('/grade/report/'.$plugin.'/index.php', array('id'=>$courseid));
2682 $gradereports[$plugin] = new grade_plugin_info($plugin, $url, $pluginstr);
2683
2684 // Add link to preferences tab if such a page exists
2685 if (file_exists($plugindir.'/preferences.php')) {
2686 $url = new moodle_url('/grade/report/'.$plugin.'/preferences.php', array('id'=>$courseid));
eb84b779
MG
2687 $gradepreferences[$plugin] = new grade_plugin_info($plugin, $url,
2688 get_string('mypreferences', 'grades') . ': ' . $pluginstr);
4d5059d4
SH
2689 }
2690 }
2691 if (count($gradereports) == 0) {
2692 $gradereports = false;
2693 $gradepreferences = false;
2694 } else if (count($gradepreferences) == 0) {
2695 $gradepreferences = false;
2696 asort($gradereports);
2697 } else {
2698 asort($gradereports);
2699 asort($gradepreferences);
2700 }
2701 self::$gradereports = $gradereports;
2702 self::$gradereportpreferences = $gradepreferences;
2703 return self::$gradereports;
2704 }
eb84b779 2705
4d5059d4
SH
2706 /**
2707 * Get information on scales
2708 * @param int $courseid
2709 * @return grade_plugin_info
2710 */
2711 public static function get_info_scales($courseid) {
2712 if (self::$scaleinfo !== null) {
2713 return self::$scaleinfo;
2714 }
d4060472 2715 if (has_capability('moodle/course:managescales', context_course::instance($courseid))) {
4d5059d4
SH
2716 $url = new moodle_url('/grade/edit/scale/index.php', array('id'=>$courseid));
2717 self::$scaleinfo = new grade_plugin_info('scale', $url, get_string('view'));
2718 } else {
2719 self::$scaleinfo = false;
2720 }
2721 return self::$scaleinfo;
2722 }
2723 /**
2724 * Get information on outcomes
2725 * @param int $courseid
2726 * @return grade_plugin_info
2727 */
2728 public static function get_info_outcomes($courseid) {
f7fcf4cd 2729 global $CFG, $SITE;
4d5059d4
SH
2730
2731 if (self::$outcomeinfo !== null) {
2732 return self::$outcomeinfo;
2733 }
d4060472 2734 $context = context_course::instance($courseid);
4d5059d4
SH
2735 $canmanage = has_capability('moodle/grade:manage', $context);
2736 $canupdate = has_capability('moodle/course:update', $context);
2737 if (!empty($CFG->enableoutcomes) && ($canmanage || $canupdate)) {
2738 $outcomes = array();
2739 if ($canupdate) {
f7fcf4cd
AD
2740 if ($courseid!=$SITE->id) {
2741 $url = new moodle_url('/grade/edit/outcome/course.php', array('id'=>$courseid));
2742 $outcomes['course'] = new grade_plugin_info('course', $url, get_string('outcomescourse', 'grades'));
2743 }
4d5059d4
SH
2744 $url = new moodle_url('/grade/edit/outcome/index.php', array('id'=>$courseid));
2745 $outcomes['edit'] = new grade_plugin_info('edit', $url, get_string('editoutcomes', 'grades'));
c46aeeab
DC
2746 $url = new moodle_url('/grade/edit/outcome/import.php', array('courseid'=>$courseid));
2747 $outcomes['import'] = new grade_plugin_info('import', $url, get_string('importoutcomes', 'grades'));
4d5059d4 2748 } else {
f7fcf4cd
AD
2749 if ($courseid!=$SITE->id) {
2750 $url = new moodle_url('/grade/edit/outcome/course.php', array('id'=>$courseid));
2751 $outcomes['edit'] = new grade_plugin_info('edit', $url, get_string('outcomescourse', 'grades'));
2752 }
4d5059d4
SH
2753 }
2754 self::$outcomeinfo = $outcomes;
2755 } else {
2756 self::$outcomeinfo = false;
2757 }
2758 return self::$outcomeinfo;
2759 }
4d5059d4
SH
2760 /**
2761 * Get information on letters
2762 * @param int $courseid
4d27bc79 2763 * @return array
4d5059d4
SH
2764 */
2765 public static function get_info_letters($courseid) {
a8dfc483 2766 global $SITE;
4d5059d4
SH
2767 if (self::$letterinfo !== null) {
2768 return self::$letterinfo;
2769 }
d4060472 2770 $context = context_course::instance($courseid);
4d5059d4
SH
2771 $canmanage = has_capability('moodle/grade:manage', $context);
2772 $canmanageletters = has_capability('moodle/grade:manageletters', $context);
2773 if ($canmanage || $canmanageletters) {
a8dfc483
AA
2774 // Redirect to system context when report is accessed from admin settings MDL-31633
2775 if ($context->instanceid == $SITE->id) {
2776 $param = array('edit' => 1);
2777 } else {
2778 $param = array('edit' => 1,'id' => $context->id);
2779 }
4d5059d4 2780 self::$letterinfo = array(
54caa598 2781 'view' => new grade_plugin_info('view', new moodle_url('/grade/edit/letter/index.php', array('id'=>$context->id)), get_string('view')),
a8dfc483 2782 'edit' => new grade_plugin_info('edit', new moodle_url('/grade/edit/letter/index.php', $param), get_string('edit'))
4d5059d4
SH
2783 );
2784 } else {
2785 self::$letterinfo = false;
2786 }
2787 return self::$letterinfo;
2788 }
2789 /**
2790 * Get information import plugins
2791 * @param int $courseid
2792 * @return array
2793 */
2794 public static function get_plugins_import($courseid) {
2795 global $CFG;
2796
2797 if (self::$importplugins !== null) {
2798 return self::$importplugins;
2799 }
2800 $importplugins = array();
d4060472 2801 $context = context_course::instance($courseid);
4d5059d4
SH
2802
2803 if (has_capability('moodle/grade:import', $context)) {
bd3b3bba 2804 foreach (core_component::get_plugin_list('gradeimport') as $plugin => $plugindir) {
4d5059d4
SH
2805 if (!has_capability('gradeimport/'.$plugin.':view', $context)) {
2806 continue;
2807 }
b5e7b2bf 2808 $pluginstr = get_string('pluginname', 'gradeimport_'.$plugin);
4d5059d4
SH
2809 $url = new moodle_url('/grade/import/'.$plugin.'/index.php', array('id'=>$courseid));
2810 $importplugins[$plugin] = new grade_plugin_info($plugin, $url, $pluginstr);
2811 }
2812
2813
2814 if ($CFG->gradepublishing) {
2815 $url = new moodle_url('/grade/import/keymanager.php', array('id'=>$courseid));
2816 $importplugins['keymanager'] = new grade_plugin_info('keymanager', $url, get_string('keymanager', 'grades'));
2817 }
2818 }
2819
2820 if (count($importplugins) > 0) {
2821 asort($importplugins);
2822 self::$importplugins = $importplugins;
2823 } else {
2824 self::$importplugins = false;
2825 }
2826 return self::$importplugins;
2827 }
2828 /**
2829 * Get information export plugins
2830 * @param int $courseid
2831 * @return array
2832 */
2833 public static function get_plugins_export($courseid) {
2834 global $CFG;
2835
2836 if (self::$exportplugins !== null) {
2837 return self::$exportplugins;
2838 }
d4060472 2839 $context = context_course::instance($courseid);
4d5059d4
SH
2840 $exportplugins = array();
2841 if (has_capability('moodle/grade:export', $context)) {
bd3b3bba 2842 foreach (core_component::get_plugin_list('gradeexport') as $plugin => $plugindir) {
4d5059d4
SH
2843 if (!has_capability('gradeexport/'.$plugin.':view', $context)) {
2844 continue;
2845 }
b5e7b2bf 2846 $pluginstr = get_string('pluginname', 'gradeexport_'.$plugin);
4d5059d4
SH
2847 $url = new moodle_url('/grade/export/'.$plugin.'/index.php', array('id'=>$courseid));
2848 $exportplugins[$plugin] = new grade_plugin_info($plugin, $url, $pluginstr);
2849 }
2850
2851 if ($CFG->gradepublishing) {
2852 $url = new moodle_url('/grade/export/keymanager.php', array('id'=>$courseid));
2853 $exportplugins['keymanager'] = new grade_plugin_info('keymanager', $url, get_string('keymanager', 'grades'));
2854 }
2855 }
2856 if (count($exportplugins) > 0) {
2857 asort($exportplugins);
2858 self::$exportplugins = $exportplugins;
2859 } else {
2860 self::$exportplugins = false;
2861 }
2862 return self::$exportplugins;
2863 }
293f42b6 2864
61c8e0d7
FM
2865 /**
2866 * Returns the value of a field from a user record
2867 *
2868 * @param stdClass $user object
2869 * @param stdClass $field object
2870 * @return string value of the field
2871 */
2872 public static function get_user_field_value($user, $field) {
2873 if (!empty($field->customid)) {
2874 $fieldname = 'customfield_' . $field->shortname;
2875 if (!empty($user->{$fieldname}) || is_numeric($user->{$fieldname})) {
2876 $fieldvalue = $user->{$fieldname};
2877 } else {
2878 $fieldvalue = $field->default;
2879 }
2880 } else {
2881 $fieldvalue = $user->{$field->shortname};
2882 }
2883 return $fieldvalue;
2884 }
2885
2886 /**
2887 * Returns an array of user profile fields to be included in export
2888 *
2889 * @param int $courseid
2890 * @param bool $includecustomfields
2891 * @return array An array of stdClass instances with customid, shortname, datatype, default and fullname fields
2892 */
2893 public static function get_user_profile_fields($courseid, $includecustomfields = false) {
2894 global $CFG, $DB;
2895
2896 // Gets the fields that have to be hidden
2897 $hiddenfields = array_map('trim', explode(',', $CFG->hiddenuserfields));
2898 $context = context_course::instance($courseid);
2899 $canseehiddenfields = has_capability('moodle/course:viewhiddenuserfields', $context);
2900 if ($canseehiddenfields) {
2901 $hiddenfields = array();
2902 }
2903
2904 $fields = array();
2905 require_once($CFG->dirroot.'/user/lib.php'); // Loads user_get_default_fields()
2906 require_once($CFG->dirroot.'/user/profile/lib.php'); // Loads constants, such as PROFILE_VISIBLE_ALL
2907 $userdefaultfields = user_get_default_fields();
2908
2909 // Sets the list of profile fields
2910 $userprofilefields = array_map('trim', explode(',', $CFG->grade_export_userprofilefields));
2911 if (!empty($userprofilefields)) {
2912 foreach ($userprofilefields as $field) {
2913 $field = trim($field);
2914 if (in_array($field, $hiddenfields) || !in_array($field, $userdefaultfields)) {
2915 continue;
2916 }
293f42b6 2917 $obj = new stdClass();
61c8e0d7 2918 $obj->customid = 0;
293f42b6 2919 $obj->shortname = $field;
61c8e0d7 2920 $obj->fullname = get_string($field);
293f42b6
CF
2921 $fields[] = $obj;
2922 }
2923 }
293f42b6 2924
61c8e0d7
FM
2925 // Sets the list of custom profile fields
2926 $customprofilefields = array_map('trim', explode(',', $CFG->grade_export_customprofilefields));
2927 if ($includecustomfields && !empty($customprofilefields)) {
2928 list($wherefields, $whereparams) = $DB->get_in_or_equal($customprofilefields);
2929 $customfields = $DB->get_records_sql("SELECT f.*
2930 FROM {user_info_field} f
2931 JOIN {user_info_category} c ON f.categoryid=c.id
2932 WHERE f.shortname $wherefields
2933 ORDER BY c.sortorder ASC, f.sortorder ASC", $whereparams);
2934 if (!is_array($customfields)) {
2935 continue;
2936 }
2937
2938 foreach ($customfields as $field) {
2939 // Make sure we can display this custom field
2940 if (!in_array($field->shortname, $customprofilefields)) {
2941 continue;
2942 } else if (in_array($field->shortname, $hiddenfields)) {
2943 continue;
2944 } else if ($field->visible != PROFILE_VISIBLE_ALL && !$canseehiddenfields) {
2945 continue;
2946 }
2947
2948 $obj = new stdClass();
2949 $obj->customid = $field->id;
2950 $obj->shortname = $field->shortname;
2951 $obj->fullname = format_string($field->name);
2952 $obj->datatype = $field->datatype;
2953 $obj->default = $field->defaultdata;
2954 $fields[] = $obj;
2955 }
2956 }
2957
2958 return $fields;
2959 }
e61f25a4
DW
2960
2961 /**
2962 * This helper method gets a snapshot of all the weights for a course.
2963 * It is used as a quick method to see if any wieghts have been automatically adjusted.
2964 * @param int $courseid
2965 * @return array of itemid -> aggregationcoef2
2966 */
2967 public static function fetch_all_natural_weights_for_course($courseid) {
2968 global $DB;
2969 $result = array();
2970
2971 $records = $DB->get_records('grade_items', array('courseid'=>$courseid), 'id', 'id, aggregationcoef2');
2972 foreach ($records as $record) {
2973 $result[$record->id] = $record->aggregationcoef2;
2974 }
2975 return $result;
2976 }
293f42b6 2977}
61c8e0d7 2978