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fixing unmerged files
[moodle.git] / grade / lib.php
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3af29899 1<?php //$Id$
cbff94ba 2
8ad36f4c 3///////////////////////////////////////////////////////////////////////////
4// //
5// NOTICE OF COPYRIGHT //
6// //
7// Moodle - Modular Object-Oriented Dynamic Learning Environment //
8// http://moodle.com //
9// //
10// Copyright (C) 1999 onwards Martin Dougiamas http://moodle.com //
11// //
12// This program is free software; you can redistribute it and/or modify //
13// it under the terms of the GNU General Public License as published by //
14// the Free Software Foundation; either version 2 of the License, or //
15// (at your option) any later version. //
16// //
17// This program is distributed in the hope that it will be useful, //
18// but WITHOUT ANY WARRANTY; without even the implied warranty of //
19// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the //
20// GNU General Public License for more details: //
21// //
22// http://www.gnu.org/copyleft/gpl.html //
23// //
24///////////////////////////////////////////////////////////////////////////
25
7a6b7acf 26require_once $CFG->libdir.'/gradelib.php';
27
0f5660f7 28
29/**
30 * This class iterates over all users that are graded in a course.
31 * Returns fetailed info about users and their grades.
32 */
33class graded_users_iterator {
34 var $course;
35 var $grade_items;
36 var $groupid;
37 var $users_rs;
38 var $grades_rs;
39 var $gradestack;
40
41 /**
42 * Constructor
43 * @param $coruse object
44 * @param array grade_items array of grade items, if not specified only user info returned
45 * @param int $groupid iterate only group users if present
46 */
47 function graded_users_iterator($course, $grade_items=null, $groupid=0) {
48 $this->course = $course;
49 $this->grade_items = $grade_items;
50 $this->groupid = $groupid;
51
52 $this->gradestack = array();
53 }
54
55 /**
56 * Initialise the iterator
57 * @return boolean success
58 */
59 function init() {
60 global $CFG;
61
62 $this->close();
63
64 grade_regrade_final_grades($this->course->id);
65 $course_item = grade_item::fetch_course_item($this->course->id);
66 if ($course_item->needsupdate) {
67 // can not calculate all final grades - sorry
68 return false;
69 }
70
71 if (strpos($CFG->gradebookroles, ',') !== false) {
72 $gradebookroles = " = {$CFG->gradebookroles}";
73 } else {
74 $gradebookroles = " IN ({$CFG->gradebookroles})";
75 }
76
77 $relatedcontexts = get_related_contexts_string(get_context_instance(CONTEXT_COURSE, $this->course->id));
78
79 if ($this->groupid) {
80 $groupsql = "INNER JOIN {$CFG->prefix}groups_members gm ON gm.userid = u.id";
81 $groupwheresql = "AND gm.groupid = {$this->groupid}";
82 } else {
83 $groupsql = "";
84 $groupwheresql = "";
85 }
86
87 $users_sql = "SELECT u.*
88 FROM {$CFG->prefix}user u
89 INNER JOIN {$CFG->prefix}role_assignments ra ON u.id = ra.userid
90 $groupsql
91 WHERE ra.roleid $gradebookroles
92 AND ra.contextid $relatedcontexts
93 $groupwheresql
94 ORDER BY u.id ASC";
caffc55a 95 $this->users_rs = get_recordset_sql($users_sql);
0f5660f7 96
97 if (!empty($this->grade_items)) {
98 $itemids = array_keys($this->grade_items);
99 $itemids = implode(',', $itemids);
100
3f2b0c8a 101 $grades_sql = "SELECT g.*
0f5660f7 102 FROM {$CFG->prefix}grade_grades g
0f5660f7 103 INNER JOIN {$CFG->prefix}user u ON g.userid = u.id
104 INNER JOIN {$CFG->prefix}role_assignments ra ON u.id = ra.userid
105 $groupsql
106 WHERE ra.roleid $gradebookroles
107 AND ra.contextid $relatedcontexts
108 AND g.itemid IN ($itemids)
109 $groupwheresql
110 ORDER BY g.userid ASC, g.itemid ASC";
caffc55a 111 $this->grades_rs = get_recordset_sql($grades_sql);
0f5660f7 112 }
113
114 return true;
115 }
116
117 /**
118 * Returns information about the next user
119 * @return mixed array of user info, all grades and feedback or null when no more users found
120 */
121 function next_user() {
03cedd62 122 if (!$this->users_rs) {
0f5660f7 123 return false; // no users present
124 }
125
caffc55a 126 if (!$user = rs_fetch_next_record($this->users_rs)) {
0f5660f7 127 return false; // no more users
128 }
129
130 //find the first grade of this user
131 $grade_records = array();
132 while (true) {
133 if (!$current = $this->_pop()) {
134 break; // no more grades
135 }
136
137 if ($current->userid < $user->id) {
138 // this should not happen, could be caused by concurrent updates - skip this record
139 continue;
140
141 } else if ($current->userid > $user->id) {
142 // this user does not have any more grades
143 $this->_push($current);
144 break;
145 }
146
147 $grade_records[$current->itemid] = $current;
148 }
149
150 $grades = array();
151 $feedbacks = array();
152
153 foreach ($this->grade_items as $grade_item) {
154 if (array_key_exists($grade_item->id, $grade_records)) {
155 $feedbacks[$grade_item->id]->feedback = $grade_records[$grade_item->id]->feedback;
156 $feedbacks[$grade_item->id]->feedbackformat = $grade_records[$grade_item->id]->feedbackformat;
157 unset($grade_records[$grade_item->id]->feedback);
158 unset($grade_records[$grade_item->id]->feedbackformat);
159 $grades[$grade_item->id] = new grade_grade($grade_records[$grade_item->id], false);
160 } else {
161 $feedbacks[$grade_item->id]->feedback = '';
162 $feedbacks[$grade_item->id]->feedbackformat = FORMAT_MOODLE;
163 $grades[$grade_item->id] = new grade_grade(array('userid'=>$user->id, 'itemid'=>$grade_item->id), false);
164 }
165 }
166
167 $result = new object();
168 $result->user = $user;
169 $result->grades = $grades;
170 $result->feedbacks = $feedbacks;
171
172 return $result;
173 }
174
175 /**
176 * Close the iterator, do not forget to call this function.
177 * @return void
178 */
179 function close() {
caffc55a 180 if ($this->users_rs) {
181 rs_close($this->users_rs);
182 $this->users_rs = null;
0f5660f7 183 }
caffc55a 184 if ($this->grades_rs) {
185 rs_close($this->grades_rs);
186 $this->grades_rs = null;
0f5660f7 187 }
188 $this->gradestack = array();
189 }
190
191 /**
192 * Internal function
193 */
194 function _push($grade) {
195 array_push($this->gradestack, $grade);
196 }
197
198 /**
199 * Internal function
200 */
201 function _pop() {
202 if (empty($this->gradestack)) {
03cedd62 203 if (!$this->grades_rs) {
0f5660f7 204 return NULL; // no grades present
205 }
206
caffc55a 207 if (!$grade = rs_fetch_next_record($this->grades_rs)) {
0f5660f7 208 return NULL; // no more grades
209 }
210
211 return $grade;
212 } else {
213 return array_pop($this->gradestack);
214 }
215 }
216}
217
0610812a 218/**
219 * Print grading plugin selection popup form.
220 *
221 * @param int $courseid id of course
222 * @param string $active_type type of plugin on current page - import, export, report or edit
223 * @param string $active_plugin active plugin type - grader, user, cvs, ...
224 * @param boolean $return return as string
225 * @return nothing or string if $return true
226 */
3af29899 227function print_grade_plugin_selector($courseid, $active_type, $active_plugin, $return=false) {
cbff94ba 228 global $CFG;
cbff94ba 229
3af29899 230 $context = get_context_instance(CONTEXT_COURSE, $courseid);
cbff94ba 231
3af29899 232 $menu = array();
6e2f3121 233 $count = 0;
3af29899 234 $active = '';
cbff94ba 235
3af29899 236/// report plugins with its special structure
237 if ($reports = get_list_of_plugins('grade/report', 'CVS')) { // Get all installed reports
238 foreach ($reports as $key => $plugin) { // Remove ones we can't see
239 if (!has_capability('gradereport/'.$plugin.':view', $context)) {
240 unset($reports[$key]);
cbff94ba 241 }
242 }
04678d8e 243 }
3af29899 244 $reportnames = array();
245 if (!empty($reports)) {
246 foreach ($reports as $plugin) {
65dd61bd 247 $url = 'report/'.$plugin.'/index.php?id='.$courseid;
3af29899 248 if ($active_type == 'report' and $active_plugin == $plugin ) {
249 $active = $url;
cbff94ba 250 }
6e2f3121 251 $reportnames[$url] = get_string('modulename', 'gradereport_'.$plugin);
252 $count++;
cbff94ba 253 }
3af29899 254 asort($reportnames);
cbff94ba 255 }
3af29899 256 if (!empty($reportnames)) {
257 $menu['reportgroup']='--'.get_string('reportplugins', 'grades');
258 $menu = $menu+$reportnames;
cbff94ba 259 }
cbff94ba 260
3af29899 261/// standard import plugins
e2008be2 262 if ($imports = get_list_of_plugins('grade/import', 'CVS')) { // Get all installed import plugins
3af29899 263 foreach ($imports as $key => $plugin) { // Remove ones we can't see
264 if (!has_capability('gradeimport/'.$plugin.':view', $context)) {
265 unset($imports[$key]);
cbff94ba 266 }
267 }
268 }
3af29899 269 $importnames = array();
270 if (!empty($imports)) {
271 foreach ($imports as $plugin) {
272 $url = 'import/'.$plugin.'/index.php?id='.$courseid;
65dd61bd 273 if ($active_type == 'import' and $active_plugin == $plugin ) {
3af29899 274 $active = $url;
275 }
6e2f3121 276 $importnames[$url] = get_string('modulename', 'gradeimport_'.$plugin);
277 $count++;
281ffa4a 278 }
3af29899 279 asort($importnames);
281ffa4a 280 }
3af29899 281 if (!empty($importnames)) {
282 $menu['importgroup']='--'.get_string('importplugins', 'grades');
283 $menu = $menu+$importnames;
281ffa4a 284 }
281ffa4a 285
3af29899 286/// standard export plugins
e2008be2 287 if ($exports = get_list_of_plugins('grade/export', 'CVS')) { // Get all installed export plugins
3af29899 288 foreach ($exports as $key => $plugin) { // Remove ones we can't see
289 if (!has_capability('gradeexport/'.$plugin.':view', $context)) {
290 unset($exports[$key]);
281ffa4a 291 }
292 }
cbff94ba 293 }
3af29899 294 $exportnames = array();
295 if (!empty($exports)) {
296 foreach ($exports as $plugin) {
297 $url = 'export/'.$plugin.'/index.php?id='.$courseid;
65dd61bd 298 if ($active_type == 'export' and $active_plugin == $plugin ) {
3af29899 299 $active = $url;
300 }
6e2f3121 301 $exportnames[$url] = get_string('modulename', 'gradeexport_'.$plugin);
302 $count++;
281ffa4a 303 }
3af29899 304 asort($exportnames);
cbff94ba 305 }
3af29899 306 if (!empty($exportnames)) {
307 $menu['exportgroup']='--'.get_string('exportplugins', 'grades');
308 $menu = $menu+$exportnames;
281ffa4a 309 }
cbff94ba 310
3af29899 311/// editing scripts - not real plugins
78ad5f3f 312 if (has_capability('moodle/grade:manage', $context)
9376f5a6 313 or has_capability('moodle/grade:manageletters', $context)
04259694 314 or has_capability('moodle/course:managescales', $context)
315 or has_capability('moodle/course:update', $context)) {
3af29899 316 $menu['edit']='--'.get_string('edit');
78ad5f3f 317
318 if (has_capability('moodle/grade:manage', $context)) {
319 $url = 'edit/tree/index.php?id='.$courseid;
320 if ($active_type == 'edit' and $active_plugin == 'tree' ) {
321 $active = $url;
322 }
323 $menu[$url] = get_string('edittree', 'grades');
6e2f3121 324 $count++;
78ad5f3f 325 }
326
327 if (has_capability('moodle/course:managescales', $context)) {
328 $url = 'edit/scale/index.php?id='.$courseid;
329 if ($active_type == 'edit' and $active_plugin == 'scale' ) {
330 $active = $url;
331 }
332 $menu[$url] = get_string('scales');
6e2f3121 333 $count++;
78ad5f3f 334 }
335
2b0f65e2 336 if (!empty($CFG->enableoutcomes) && (has_capability('moodle/grade:manage', $context) or
2a598439 337 has_capability('moodle/course:update', $context))) {
338 if (has_capability('moodle/course:update', $context)) { // Default to course assignment
04259694 339 $url = 'edit/outcome/course.php?id='.$courseid;
2a598439 340 } else {
341 $url = 'edit/outcome/index.php?id='.$courseid;
04259694 342 }
78ad5f3f 343 if ($active_type == 'edit' and $active_plugin == 'outcome' ) {
344 $active = $url;
345 }
346 $menu[$url] = get_string('outcomes', 'grades');
6e2f3121 347 $count++;
cbff94ba 348 }
284abb09 349
9376f5a6 350 if (has_capability('moodle/grade:manage', $context) or has_capability('moodle/grade:manageletters', $context)) {
284abb09 351 $url = 'edit/letter/index.php?id='.$courseid;
352 if ($active_type == 'edit' and $active_plugin == 'letter' ) {
353 $active = $url;
354 }
355 $menu[$url] = get_string('letters', 'grades');
6e2f3121 356 $count++;
284abb09 357 }
358
e0724506 359 if (has_capability('moodle/grade:manage', $context)) {
360 $url = 'edit/settings/index.php?id='.$courseid;
361 if ($active_type == 'edit' and $active_plugin == 'settings' ) {
362 $active = $url;
363 }
364 $menu[$url] = get_string('coursesettings', 'grades');
6e2f3121 365 $count++;
e0724506 366 }
367
281ffa4a 368 }
369
3af29899 370/// finally print/return the popup form
6e2f3121 371 if ($count > 1) {
372 return popup_form($CFG->wwwroot.'/grade/', $menu, 'choosepluginreport', $active, 'choose', '', '', $return, 'self', get_string('view'));
373 } else {
374 // only one option - no plugin selector needed
375 return '';
376 }
cbff94ba 377}
378
0610812a 379/**
7a6b7acf 380 * Utility class used for return tracking when using edit and other forms in grade plugins
0610812a 381 */
3af29899 382class grade_plugin_return {
383 var $type;
384 var $plugin;
385 var $courseid;
386 var $userid;
387 var $page;
281ffa4a 388
0610812a 389 /**
390 * Constructor
391 * @param array $params - associative array with return parameters, if null parameter are taken from _GET or _POST
392 */
3af29899 393 function grade_plugin_return ($params=null) {
394 if (empty($params)) {
395 $this->type = optional_param('gpr_type', null, PARAM_SAFEDIR);
396 $this->plugin = optional_param('gpr_plugin', null, PARAM_SAFEDIR);
397 $this->courseid = optional_param('gpr_courseid', null, PARAM_INT);
398 $this->userid = optional_param('gpr_userid', null, PARAM_INT);
399 $this->page = optional_param('gpr_page', null, PARAM_INT);
a983b6ec 400
a983b6ec 401 } else {
3af29899 402 foreach ($params as $key=>$value) {
403 if (array_key_exists($key, $this)) {
404 $this->$key = $value;
405 }
cbff94ba 406 }
407 }
6cd8c592 408 }
409
0610812a 410 /**
411 * Returns return parameters as options array suitable for buttons.
412 * @return array options
413 */
3af29899 414 function get_options() {
7a6b7acf 415 if (empty($this->type)) {
3af29899 416 return array();
865e9a82 417 }
6cd8c592 418
3af29899 419 $params = array();
6cd8c592 420
7a6b7acf 421 if (!empty($this->plugin)) {
422 $params['plugin'] = $this->plugin;
423 }
6cd8c592 424
3af29899 425 if (!empty($this->courseid)) {
426 $params['id'] = $this->courseid;
6cd8c592 427 }
9c61ba4d 428
3af29899 429 if (!empty($this->userid)) {
430 $params['userid'] = $this->userid;
9c61ba4d 431 }
9c61ba4d 432
3af29899 433 if (!empty($this->page)) {
434 $params['page'] = $this->page;
cbff94ba 435 }
865e9a82 436
3af29899 437 return $params;
cbff94ba 438 }
cbff94ba 439
0610812a 440 /**
441 * Returns return url
442 * @param string $default default url when params not set
443 * @return string url
444 */
65dd61bd 445 function get_return_url($default, $extras=null) {
3af29899 446 global $CFG;
cbff94ba 447
3af29899 448 if (empty($this->type) or empty($this->plugin)) {
449 return $default;
cbff94ba 450 }
451
65dd61bd 452 $url = $CFG->wwwroot.'/grade/'.$this->type.'/'.$this->plugin.'/index.php';
453 $glue = '?';
cbff94ba 454
3af29899 455 if (!empty($this->courseid)) {
456 $url .= $glue.'id='.$this->courseid;
457 $glue = '&amp;';
cbff94ba 458 }
cbff94ba 459
3af29899 460 if (!empty($this->userid)) {
461 $url .= $glue.'userid='.$this->userid;
462 $glue = '&amp;';
cbff94ba 463 }
7e2d7c92 464
3af29899 465 if (!empty($this->page)) {
466 $url .= $glue.'page='.$this->page;
65dd61bd 467 $glue = '&amp;';
468 }
469
470 if (!empty($extras)) {
471 foreach($extras as $key=>$value) {
472 $url .= $glue.$key.'='.$value;
473 $glue = '&amp;';
7a6b7acf 474 }
cbff94ba 475 }
cbff94ba 476
3af29899 477 return $url;
cbff94ba 478 }
cbff94ba 479
0610812a 480 /**
481 * Returns string with hidden return tracking form elements.
482 * @return string
483 */
3af29899 484 function get_form_fields() {
7a6b7acf 485 if (empty($this->type)) {
3af29899 486 return '';
cbff94ba 487 }
cbff94ba 488
3af29899 489 $result = '<input type="hidden" name="gpr_type" value="'.$this->type.'" />';
7a6b7acf 490
491 if (!empty($this->plugin)) {
492 $result .= '<input type="hidden" name="gpr_plugin" value="'.$this->plugin.'" />';
493 }
0ca5abd6 494
3af29899 495 if (!empty($this->courseid)) {
496 $result .= '<input type="hidden" name="gpr_courseid" value="'.$this->courseid.'" />';
cbff94ba 497 }
cbff94ba 498
3af29899 499 if (!empty($this->userid)) {
500 $result .= '<input type="hidden" name="gpr_userid" value="'.$this->userid.'" />';
cbff94ba 501 }
cbff94ba 502
3af29899 503 if (!empty($this->page)) {
504 $result .= '<input type="hidden" name="gpr_page" value="'.$this->page.'" />';
cbff94ba 505 }
506 }
cbff94ba 507
0610812a 508 /**
509 * Add hidden elements into mform
510 * @param object $mform moodle form object
511 * @return void
512 */
3af29899 513 function add_mform_elements(&$mform) {
7a6b7acf 514 if (empty($this->type)) {
3af29899 515 return;
cbff94ba 516 }
cbff94ba 517
3af29899 518 $mform->addElement('hidden', 'gpr_type', $this->type);
519 $mform->setType('gpr_type', PARAM_SAFEDIR);
cbff94ba 520
7a6b7acf 521 if (!empty($this->plugin)) {
522 $mform->addElement('hidden', 'gpr_plugin', $this->plugin);
523 $mform->setType('gpr_plugin', PARAM_SAFEDIR);
524 }
97033c86 525
3af29899 526 if (!empty($this->courseid)) {
527 $mform->addElement('hidden', 'gpr_courseid', $this->courseid);
528 $mform->setType('gpr_courseid', PARAM_INT);
cbff94ba 529 }
cbff94ba 530
3af29899 531 if (!empty($this->userid)) {
532 $mform->addElement('hidden', 'gpr_userid', $this->userid);
533 $mform->setType('gpr_userid', PARAM_INT);
cbff94ba 534 }
cbff94ba 535
3af29899 536 if (!empty($this->page)) {
537 $mform->addElement('hidden', 'gpr_page', $this->page);
538 $mform->setType('gpr_page', PARAM_INT);
cbff94ba 539 }
540 }
281ffa4a 541
0610812a 542 /**
543 * Add return tracking params into url
544 * @param string $url
545 * @return string $url with erturn tracking params
546 */
3af29899 547 function add_url_params($url) {
7a6b7acf 548 if (empty($this->type)) {
3af29899 549 return $url;
cbff94ba 550 }
5609f9e6 551
3af29899 552 if (strpos($url, '?') === false) {
553 $url .= '?gpr_type='.$this->type;
554 } else {
555 $url .= '&amp;gpr_type='.$this->type;
cbff94ba 556 }
cbff94ba 557
7a6b7acf 558 if (!empty($this->plugin)) {
559 $url .= '&amp;gpr_plugin='.$this->plugin;
560 }
cbff94ba 561
3af29899 562 if (!empty($this->courseid)) {
563 $url .= '&amp;gpr_courseid='.$this->courseid;
cbff94ba 564 }
cbff94ba 565
3af29899 566 if (!empty($this->userid)) {
567 $url .= '&amp;gpr_userid='.$this->userid;
cbff94ba 568 }
0a8a95c9 569
3af29899 570 if (!empty($this->page)) {
571 $url .= '&amp;gpr_page='.$this->page;
0a8a95c9 572 }
5a412dbf 573
3af29899 574 return $url;
5a412dbf 575 }
5a412dbf 576}
7a6b7acf 577
826c5f86 578/**
579 * Function central to gradebook for building and printing the navigation (breadcrumb trail).
580 * @param string $path The path of the calling script (using __FILE__?)
581 * @param string $pagename The language string to use as the last part of the navigation (non-link)
582 * @param mixed $id Either a plain integer (assuming the key is 'id') or an array of keys and values (e.g courseid => $courseid, itemid...)
583 * @return string
584 */
585function grade_build_nav($path, $pagename=null, $id=null) {
586 global $CFG, $COURSE;
587
588 $strgrades = get_string('grades', 'grades');
589
590 // Parse the path and build navlinks from its elements
591 $dirroot_length = strlen($CFG->dirroot) + 1; // Add 1 for the first slash
592 $path = substr($path, $dirroot_length);
593 $path = str_replace('\\', '/', $path);
594
595 $path_elements = explode('/', $path);
596
597 $path_elements_count = count($path_elements);
598
826c5f86 599 // First link is always 'grade'
600 $navlinks = array();
601 $navlinks[] = array('name' => $strgrades,
602 'link' => $CFG->wwwroot.'/grade/index.php?id='.$COURSE->id,
603 'type' => 'misc');
604
605 $link = '';
606 $numberofelements = 3;
607
608 // Prepare URL params string
609 $id_string = '?';
610 if (!is_null($id)) {
611 if (is_array($id)) {
612 foreach ($id as $idkey => $idvalue) {
613 $id_string .= "$idkey=$idvalue&amp;";
614 }
615 } else {
616 $id_string .= "id=$id";
617 }
618 }
619
620 $navlink4 = null;
621
0f78c4de 622 // Remove file extensions from filenames
623 foreach ($path_elements as $key => $filename) {
624 $path_elements[$key] = str_replace('.php', '', $filename);
625 }
626
826c5f86 627 // Second level links
628 switch ($path_elements[1]) {
629 case 'edit': // No link
630 if ($path_elements[3] != 'index.php') {
631 $numberofelements = 4;
632 }
633 break;
634 case 'import': // No link
635 break;
636 case 'export': // No link
637 break;
638 case 'report':
639 // $id is required for this link. Do not print it if $id isn't given
640 if (!is_null($id)) {
641 $link = $CFG->wwwroot . '/grade/report/index.php' . $id_string;
642 }
643
644 if ($path_elements[2] == 'grader') {
645 $numberofelements = 4;
646 }
647 break;
648
649 default:
650 // If this element isn't among the ones already listed above, it isn't supported, throw an error.
651 debugging("grade_build_nav() doesn't support ". $path_elements[1] . " as the second path element after 'grade'.");
652 return false;
653 }
654
655 $navlinks[] = array('name' => get_string($path_elements[1], 'grades'), 'link' => $link, 'type' => 'misc');
656
657 // Third level links
658 if (empty($pagename)) {
659 $pagename = get_string($path_elements[2], 'grades');
660 }
661
662 switch ($numberofelements) {
663 case 3:
664 $navlinks[] = array('name' => $pagename, 'link' => $link, 'type' => 'misc');
665 break;
666 case 4:
667
668 if ($path_elements[2] == 'grader' AND $path_elements[3] != 'index.php') {
3cf6a6d5 669 $navlinks[] = array('name' => get_string('modulename', 'gradereport_grader'),
826c5f86 670 'link' => "$CFG->wwwroot/grade/report/grader/index.php$id_string",
671 'type' => 'misc');
672 }
673 $navlinks[] = array('name' => $pagename, 'link' => '', 'type' => 'misc');
674 break;
675 }
676 $navigation = build_navigation($navlinks);
677
678 return $navigation;
d4795a07 679}
7a6b7acf 680
66ef0471 681/**
682 * Computes then returns the percentage value of the grade value within the given range.
683 * @param float $gradeval
684 * @param float $grademin
685 * @param float $grademx
686 * @return float $percentage
687 */
688function grade_to_percentage($gradeval, $grademin, $grademax) {
689 if ($grademin >= $grademax) {
690 debugging("The minimum grade ($grademin) was higher than or equal to the maximum grade ($grademax)!!! Cannot proceed with computation.");
691 }
33a34cd4 692
693 // If given gradevalue is lower than grademin, adjust it to grademin
694 if ($gradeval < $grademin || empty($gradeval)) {
695 $gradeval = $grademin;
696 }
697
66ef0471 698 $offset_value = $gradeval - $grademin;
699 $offset_max = $grademax - $grademin;
700 $factor = 100 / $offset_max;
701 $percentage = $offset_value * $factor;
702 return $percentage;
703}
704
e98871a2 705/**
6cc3e350 706 * General structure representing grade items in course
e98871a2 707 */
6cc3e350 708class grade_structure {
709 var $context;
e98871a2 710
6cc3e350 711 var $courseid;
e98871a2 712
713 /**
714 * 1D array of grade items only
715 */
716 var $items;
717
6391ebe7 718 /**
6cc3e350 719 * Returns icon of element
720 * @param object $element
721 * @param bool $spacerifnone return spacer if no icon found
722 * @return string icon or spacer
6391ebe7 723 */
6cc3e350 724 function get_element_icon(&$element, $spacerifnone=false) {
725 global $CFG;
726
727 switch ($element['type']) {
728 case 'item':
729 case 'courseitem':
730 case 'categoryitem':
731 if ($element['object']->is_calculated()) {
732 return '<img src="'.$CFG->pixpath.'/i/calc.gif" class="icon itemicon" alt="'.get_string('calculation', 'grades').'"/>';
733
734 } else if (($element['object']->is_course_item() or $element['object']->is_category_item())
735 and ($element['object']->gradetype == GRADE_TYPE_SCALE or $element['object']->gradetype == GRADE_TYPE_VALUE)) {
736 if ($category = $element['object']->get_item_category()) {
737 switch ($category->aggregation) {
738 case GRADE_AGGREGATE_MEAN:
739 case GRADE_AGGREGATE_MEDIAN:
740 case GRADE_AGGREGATE_WEIGHTED_MEAN:
1426edac 741 case GRADE_AGGREGATE_WEIGHTED_MEAN2:
6cc3e350 742 case GRADE_AGGREGATE_EXTRACREDIT_MEAN:
743 return '<img src="'.$CFG->pixpath.'/i/agg_mean.gif" class="icon itemicon" alt="'.get_string('aggregation', 'grades').'"/>';
0758a08e 744 case GRADE_AGGREGATE_SUM:
745 return '<img src="'.$CFG->pixpath.'/i/agg_sum.gif" class="icon itemicon" alt="'.get_string('aggregation', 'grades').'"/>';
6cc3e350 746 }
747 }
748
749 } else if ($element['object']->itemtype == 'mod') {
750 return '<img src="'.$CFG->modpixpath.'/'.$element['object']->itemmodule.'/icon.gif" class="icon itemicon" alt="'
751 .get_string('modulename', $element['object']->itemmodule).'"/>';
752
753 } else if ($element['object']->itemtype == 'manual') {
754 if ($element['object']->is_outcome_item()) {
755 return '<img src="'.$CFG->pixpath.'/i/outcomes.gif" class="icon itemicon" alt="'.get_string('outcome', 'grades').'"/>';
756 } else {
757 //TODO: add better icon
758 return '<img src="'.$CFG->pixpath.'/t/edit.gif" class="icon itemicon" alt="'.get_string('manualitem', 'grades').'"/>';
759 }
760 }
761 break;
762
763 case 'category':
764 return '<img src="'.$CFG->pixpath.'/f/folder.gif" class="icon itemicon" alt="'.get_string('category', 'grades').'"/>';
765 }
766
767 if ($spacerifnone) {
768 return '<img src="'.$CFG->wwwroot.'/pix/spacer.gif" class="icon itemicon" alt=""/>';
769 } else {
770 return '';
771 }
772 }
6391ebe7 773
e98871a2 774 /**
6cc3e350 775 * Returns name of element optionally with icon and link
776 * @param object $element
777 * @param bool $withlinks
778 * @param bool $icons
779 * @param bool $spacerifnone return spacer if no icon found
780 * @return header string
e98871a2 781 */
6cc3e350 782 function get_element_header(&$element, $withlink=false, $icon=true, $spacerifnone=false) {
783 global $CFG;
784
785 $header = '';
786
787 if ($icon) {
788 $header .= $this->get_element_icon($element, $spacerifnone);
789 }
790
791 $header .= $element['object']->get_name();
792
793 if ($element['type'] != 'item' and $element['type'] != 'categoryitem' and $element['type'] != 'courseitem') {
794 return $header;
795 }
796
797 $itemtype = $element['object']->itemtype;
798 $itemmodule = $element['object']->itemmodule;
799 $iteminstance = $element['object']->iteminstance;
800
801 if ($withlink and $itemtype=='mod' and $iteminstance and $itemmodule) {
802 $cm = get_coursemodule_from_instance($itemmodule, $iteminstance, $this->courseid);
803
804 $dir = $CFG->dirroot.'/mod/'.$itemmodule;
805
806 if (file_exists($dir.'/grade.php')) {
807 $url = $CFG->wwwroot.'/mod/'.$itemmodule.'/grade.php?id='.$cm->id;
808 } else {
809 $url = $CFG->wwwroot.'/mod/'.$itemmodule.'/view.php?id='.$cm->id;
810 }
811
812 $header = '<a href="'.$url.'">'.$header.'</a>';
813 }
814
815 return $header;
816 }
817
818 /**
819 * Returns the grade eid - the grade may not exist yet.
820 * @param $grade_grade object
821 * @return string eid
822 */
823 function get_grade_eid($grade_grade) {
824 if (empty($grade_grade->id)) {
825 return 'n'.$grade_grade->itemid.'u'.$grade_grade->userid;
826 } else {
827 return 'g'.$grade_grade->id;
828 }
829 }
830
831 /**
832 * Returns the grade_item eid
833 * @param $grade_item object
834 * @return string eid
835 */
836 function get_item_eid($grade_item) {
837 return 'i'.$grade_item->id;
838 }
839
840 /**
841 * Return edit icon for give element
842 * @param object $element
843 * @return string
844 */
845 function get_edit_icon($element, $gpr) {
846 global $CFG;
847
848 if (!has_capability('moodle/grade:manage', $this->context)) {
849 if ($element['type'] == 'grade' and has_capability('moodle/grade:edit', $this->context)) {
850 // oki - let them override grade
851 } else {
852 return '';
853 }
854 }
855
856 static $stredit = null;
857 static $strfeedback = null;
858 if (is_null($stredit)) {
859 $stredit = get_string('edit');
860 $strfeedback = get_string('feedback');
861 }
862
863 $object = $element['object'];
864 $overlib = '';
865
866 switch ($element['type']) {
867 case 'item':
868 case 'categoryitem':
869 case 'courseitem':
870 if (empty($object->outcomeid) || empty($CFG->enableoutcomes)) {
871 $url = $CFG->wwwroot.'/grade/edit/tree/item.php?courseid='.$this->courseid.'&amp;id='.$object->id;
872 } else {
873 $url = $CFG->wwwroot.'/grade/edit/tree/outcomeitem.php?courseid='.$this->courseid.'&amp;id='.$object->id;
874 }
875 $url = $gpr->add_url_params($url);
876 break;
877
878 case 'category':
879 $url = $CFG->wwwroot.'/grade/edit/tree/category.php?courseid='.$this->courseid.'&amp;id='.$object->id;
880 $url = $gpr->add_url_params($url);
881 break;
882
883 case 'grade':
884 if (empty($object->id)) {
885 $url = $CFG->wwwroot.'/grade/edit/tree/grade.php?courseid='.$this->courseid.'&amp;itemid='.$object->itemid.'&amp;userid='.$object->userid;
886 } else {
887 $url = $CFG->wwwroot.'/grade/edit/tree/grade.php?courseid='.$this->courseid.'&amp;id='.$object->id;
888 }
889 $url = $gpr->add_url_params($url);
890 if (!empty($object->feedback)) {
891 $feedback = addslashes_js(trim(format_string($object->feedback, $object->feedbackformat)));
892 $function = "return overlib('$feedback', BORDER, 0, FGCLASS, 'feedback', "
893 ."CAPTIONFONTCLASS, 'caption', CAPTION, '$strfeedback');";
894 $overlib = 'onmouseover="'.s($function).'" onmouseout="return nd();"';
895 }
896 break;
897
898 default:
899 $url = null;
900 }
901
902 if ($url) {
903 return '<a href="'.$url.'"><img '.$overlib.' src="'.$CFG->pixpath.'/t/edit.gif" class="iconsmall" alt="'.$stredit.'" title="'.$stredit.'"/></a>';
904
905 } else {
906 return '';
907 }
908 }
909
910 /**
911 * Return hiding icon for give element
912 * @param object $element
913 * @return string
914 */
915 function get_hiding_icon($element, $gpr) {
916 global $CFG;
917
918 if (!has_capability('moodle/grade:manage', $this->context) and !has_capability('moodle/grade:hide', $this->context)) {
919 return '';
920 }
921
922 static $strshow = null;
923 static $strhide = null;
924 if (is_null($strshow)) {
925 $strshow = get_string('show');
926 $strhide = get_string('hide');
927 }
928
929 if ($element['object']->is_hidden()) {
930 $icon = 'show';
931 $tooltip = $strshow;
932
933 if ($element['type'] != 'category' and $element['object']->get_hidden() > 1) { // Change the icon and add a tooltip showing the date
934 $icon = 'hiddenuntil';
935 $tooltip = get_string('hiddenuntildate', 'grades', userdate($element['object']->get_hidden()));
936 }
937
938 $url = $CFG->wwwroot.'/grade/edit/tree/action.php?id='.$this->courseid.'&amp;action=show&amp;sesskey='.sesskey()
939 . '&amp;eid='.$element['eid'];
940 $url = $gpr->add_url_params($url);
941 $action = '<a href="'.$url.'"><img alt="'.$strshow.'" src="'.$CFG->pixpath.'/t/'.$icon.'.gif" class="iconsmall" title="'.$tooltip.'"/></a>';
942
943 } else {
944 $url = $CFG->wwwroot.'/grade/edit/tree/action.php?id='.$this->courseid.'&amp;action=hide&amp;sesskey='.sesskey()
945 . '&amp;eid='.$element['eid'];
946 $url = $gpr->add_url_params($url);
947 $action = '<a href="'.$url.'"><img src="'.$CFG->pixpath.'/t/hide.gif" class="iconsmall" alt="'.$strhide.'" title="'.$strhide.'"/></a>';
948 }
949 return $action;
950 }
951
952 /**
953 * Return locking icon for give element
954 * @param object $element
955 * @return string
956 */
957 function get_locking_icon($element, $gpr) {
958 global $CFG;
959
960 static $strunlock = null;
961 static $strlock = null;
962 if (is_null($strunlock)) {
963 $strunlock = get_string('unlock', 'grades');
964 $strlock = get_string('lock', 'grades');
965 }
966
967 if ($element['object']->is_locked()) {
968 $icon = 'unlock';
969 $tooltip = $strunlock;
970
971 if ($element['type'] != 'category' and $element['object']->get_locktime() > 1) { // Change the icon and add a tooltip showing the date
972 $icon = 'locktime';
973 $tooltip = get_string('locktimedate', 'grades', userdate($element['object']->get_locktime()));
974 }
975
976 if (!has_capability('moodle/grade:manage', $this->context) and !has_capability('moodle/grade:unlock', $this->context)) {
977 return '';
978 }
979 $url = $CFG->wwwroot.'/grade/edit/tree/action.php?id='.$this->courseid.'&amp;action=unlock&amp;sesskey='.sesskey()
980 . '&amp;eid='.$element['eid'];
981 $url = $gpr->add_url_params($url);
982 $action = '<a href="'.$url.'"><img src="'.$CFG->pixpath.'/t/'.$icon.'.gif" alt="'.$strunlock.'" class="iconsmall" title="'.$tooltip.'"/></a>';
983
984 } else {
985 if (!has_capability('moodle/grade:manage', $this->context) and !has_capability('moodle/grade:lock', $this->context)) {
986 return '';
987 }
988 $url = $CFG->wwwroot.'/grade/edit/tree/action.php?id='.$this->courseid.'&amp;action=lock&amp;sesskey='.sesskey()
989 . '&amp;eid='.$element['eid'];
990 $url = $gpr->add_url_params($url);
991 $action = '<a href="'.$url.'"><img src="'.$CFG->pixpath.'/t/lock.gif" class="iconsmall" alt="'.$strlock.'" title="'
992 . $strlock.'"/></a>';
993 }
994 return $action;
995 }
996
997 /**
998 * Return calculation icon for given element
999 * @param object $element
1000 * @return string
1001 */
1002 function get_calculation_icon($element, $gpr) {
1003 global $CFG;
1004 if (!has_capability('moodle/grade:manage', $this->context)) {
1005 return '';
1006 }
1007
1008 $calculation_icon = '';
1009
1010 $type = $element['type'];
1011 $object = $element['object'];
1012
1013 if ($type == 'item' or $type == 'courseitem' or $type == 'categoryitem') {
1014 $streditcalculation = get_string('editcalculation', 'grades');
1015
1016 // show calculation icon only when calculation possible
1017 if ((!$object->is_external_item() or $object->is_outcome_item())
1018 and ($object->gradetype == GRADE_TYPE_SCALE or $object->gradetype == GRADE_TYPE_VALUE)) {
1019 if ($object->is_calculated()) {
1020 $icon = 'calc.gif';
1021 } else {
1022 $icon = 'calc_off.gif';
1023 }
1024 $url = $CFG->wwwroot.'/grade/edit/tree/calculation.php?courseid='.$this->courseid.'&amp;id='.$object->id;
1025 $url = $gpr->add_url_params($url);
1026 $calculation_icon = '<a href="'. $url.'"><img src="'.$CFG->pixpath.'/t/'.$icon.'" class="iconsmall" alt="'
1027 . $streditcalculation.'" title="'.$streditcalculation.'" /></a>'. "\n";
1028 }
1029 }
1030
1031 return $calculation_icon;
1032 }
1033}
1034
1035/**
1036 * Flat structure similar to grade tree.
1037 */
1038class grade_seq extends grade_structure {
1039
1040 /**
1041 * A string of GET URL variables, namely courseid and sesskey, used in most URLs built by this class.
1042 * @var string $commonvars
1043 */
1044 var $commonvars;
1045
1046 /**
1047 * 1D array of elements
1048 */
1049 var $elements;
e98871a2 1050
1051 /**
1052 * Constructor, retrieves and stores array of all grade_category and grade_item
1053 * objects for the given courseid. Full objects are instantiated. Ordering sequence is fixed if needed.
1054 * @param int $courseid
1055 * @param boolean $category_grade_last category grade item is the last child
1056 * @param array $collapsed array of collapsed categories
1057 */
1058 function grade_seq($courseid, $category_grade_last=false, $nooutcomes=false) {
1059 global $USER, $CFG;
1060
1061 $this->courseid = $courseid;
1062 $this->commonvars = "&amp;sesskey=$USER->sesskey&amp;id=$this->courseid";
1063 $this->context = get_context_instance(CONTEXT_COURSE, $courseid);
1064
1065 // get course grade tree
1066 $top_element = grade_category::fetch_course_tree($courseid, true);
1067
6391ebe7 1068 $this->elements = grade_seq::flatten($top_element, $category_grade_last, $nooutcomes);
1069
1070 foreach ($this->elements as $key=>$unused) {
b89a70ce 1071 $this->items[$this->elements[$key]['object']->id] =& $this->elements[$key]['object'];
6391ebe7 1072 }
e98871a2 1073 }
1074
1075 /**
1076 * Static recursive helper - makes the grade_item for category the last children
1077 * @static
1078 * @param array $element The seed of the recursion
1079 * @return void
1080 */
1081 function flatten(&$element, $category_grade_last, $nooutcomes) {
1082 if (empty($element['children'])) {
1083 return array();
1084 }
1085 $children = array();
1086
1087 foreach ($element['children'] as $sortorder=>$unused) {
1088 if ($nooutcomes and $element['type'] != 'category' and $element['children'][$sortorder]['object']->is_outcome_item()) {
1089 continue;
1090 }
1091 $children[] = $element['children'][$sortorder];
1092 }
1093 unset($element['children']);
1094
1095 if ($category_grade_last and count($children) > 1) {
1096 $cat_item = array_shift($children);
1097 array_push($children, $cat_item);
1098 }
1099
1100 $result = array();
1101 foreach ($children as $child) {
e0724506 1102 if ($child['type'] == 'category') {
6391ebe7 1103 $result = $result + grade_seq::flatten($child, $category_grade_last, $nooutcomes);
e98871a2 1104 } else {
1105 $child['eid'] = 'i'.$child['object']->id;
6391ebe7 1106 $result[$child['object']->id] = $child;
e98871a2 1107 }
1108 }
1109
1110 return $result;
1111 }
1112
1113 /**
1114 * Parses the array in search of a given eid and returns a element object with
1115 * information about the element it has found.
1116 * @param int $eid
1117 * @return object element
1118 */
1119 function locate_element($eid) {
1120 // it is a grade - construct a new object
1121 if (strpos($eid, 'n') === 0) {
1122 if (!preg_match('/n(\d+)u(\d+)/', $eid, $matches)) {
1123 return null;
1124 }
1125
1126 $itemid = $matches[1];
1127 $userid = $matches[2];
1128
1129 //extra security check - the grade item must be in this tree
1130 if (!$item_el = $this->locate_element('i'.$itemid)) {
1131 return null;
1132 }
1133
1134 // $gradea->id may be null - means does not exist yet
1135 $grade = new grade_grade(array('itemid'=>$itemid, 'userid'=>$userid));
1136
1137 $grade->grade_item =& $item_el['object']; // this may speedup grade_grade methods!
1138 return array('eid'=>'n'.$itemid.'u'.$userid,'object'=>$grade, 'type'=>'grade');
1139
1140 } else if (strpos($eid, 'g') === 0) {
1141 $id = (int)substr($eid, 1);
1142 if (!$grade = grade_grade::fetch(array('id'=>$id))) {
1143 return null;
1144 }
1145 //extra security check - the grade item must be in this tree
1146 if (!$item_el = $this->locate_element('i'.$grade->itemid)) {
1147 return null;
1148 }
1149 $grade->grade_item =& $item_el['object']; // this may speedup grade_grade methods!
1150 return array('eid'=>'g'.$id,'object'=>$grade, 'type'=>'grade');
1151 }
1152
1153 // it is a category or item
6391ebe7 1154 foreach ($this->elements as $element) {
6cc3e350 1155 if ($element['eid'] == $eid) {
1156 return $element;
1157 }
e98871a2 1158 }
6cc3e350 1159
1160 return null;
e98871a2 1161 }
e98871a2 1162}
1163
7a6b7acf 1164/**
1165 * This class represents a complete tree of categories, grade_items and final grades,
1166 * organises as an array primarily, but which can also be converted to other formats.
1167 * It has simple method calls with complex implementations, allowing for easy insertion,
1168 * deletion and moving of items and categories within the tree.
1169 */
6cc3e350 1170class grade_tree extends grade_structure {
7a6b7acf 1171
1172 /**
1173 * The basic representation of the tree as a hierarchical, 3-tiered array.
1174 * @var object $top_element
1175 */
1176 var $top_element;
1177
1178 /**
1179 * A string of GET URL variables, namely courseid and sesskey, used in most URLs built by this class.
1180 * @var string $commonvars
1181 */
1182 var $commonvars;
1183
1184 /**
1185 * 2D array of grade items and categories
1186 */
1187 var $levels;
1188
b89a70ce 1189 /**
1190 * Grade items
1191 */
1192 var $items;
1193
7a6b7acf 1194 /**
1195 * Constructor, retrieves and stores a hierarchical array of all grade_category and grade_item
e98871a2 1196 * objects for the given courseid. Full objects are instantiated. Ordering sequence is fixed if needed.
7a6b7acf 1197 * @param int $courseid
1198 * @param boolean $fillers include fillers and colspans, make the levels var "rectangular"
1199 * @param boolean $category_grade_last category grade item is the last child
4faf5f99 1200 * @param array $collapsed array of collapsed categories
7a6b7acf 1201 */
aea4df41 1202 function grade_tree($courseid, $fillers=true, $category_grade_last=false, $collapsed=null, $nooutcomes=false) {
7a6b7acf 1203 global $USER, $CFG;
1204
1205 $this->courseid = $courseid;
1206 $this->commonvars = "&amp;sesskey=$USER->sesskey&amp;id=$this->courseid";
1207 $this->levels = array();
2cc773f5 1208 $this->context = get_context_instance(CONTEXT_COURSE, $courseid);
7a6b7acf 1209
1210 // get course grade tree
1211 $this->top_element = grade_category::fetch_course_tree($courseid, true);
1212
4faf5f99 1213 // collapse the categories if requested
1214 if (!empty($collapsed)) {
1215 grade_tree::category_collapse($this->top_element, $collapsed);
1216 }
1217
aea4df41 1218 // no otucomes if requested
1219 if (!empty($nooutcomes)) {
1220 grade_tree::no_outcomes($this->top_element);
1221 }
1222
4faf5f99 1223 // move category item to last position in category
7a6b7acf 1224 if ($category_grade_last) {
1225 grade_tree::category_grade_last($this->top_element);
1226 }
1227
1228 if ($fillers) {
1229 // inject fake categories == fillers
1230 grade_tree::inject_fillers($this->top_element, 0);
1231 // add colspans to categories and fillers
1232 grade_tree::inject_colspans($this->top_element);
1233 }
1234
1235 grade_tree::fill_levels($this->levels, $this->top_element, 0);
d297269d 1236
7a6b7acf 1237 }
1238
4faf5f99 1239 /**
1240 * Static recursive helper - removes items from collapsed categories
1241 * @static
1242 * @param array $element The seed of the recursion
1243 * @param array $collapsed array of collapsed categories
1244 * @return void
1245 */
1246 function category_collapse(&$element, $collapsed) {
1247 if ($element['type'] != 'category') {
1248 return;
1249 }
1250 if (empty($element['children']) or count($element['children']) < 2) {
1251 return;
1252 }
1253
384960dd 1254 if (in_array($element['object']->id, $collapsed['aggregatesonly'])) {
4faf5f99 1255 $category_item = reset($element['children']); //keep only category item
1256 $element['children'] = array(key($element['children'])=>$category_item);
1257
1258 } else {
384960dd 1259 if (in_array($element['object']->id, $collapsed['gradesonly'])) { // Remove category item
1260 reset($element['children']);
1261 $first_key = key($element['children']);
1262 unset($element['children'][$first_key]);
1263 }
1264 foreach ($element['children'] as $sortorder=>$child) { // Recurse through the element's children
4faf5f99 1265 grade_tree::category_collapse($element['children'][$sortorder], $collapsed);
1266 }
1267 }
1268 }
7a6b7acf 1269
aea4df41 1270 /**
1271 * Static recursive helper - removes all outcomes
1272 * @static
1273 * @param array $element The seed of the recursion
1274 * @return void
1275 */
1276 function no_outcomes(&$element) {
1277 if ($element['type'] != 'category') {
1278 return;
1279 }
1280 foreach ($element['children'] as $sortorder=>$child) {
1281 if ($element['children'][$sortorder]['type'] == 'item'
1282 and $element['children'][$sortorder]['object']->is_outcome_item()) {
1283 unset($element['children'][$sortorder]);
1284
d4795a07 1285 } else if ($element['children'][$sortorder]['type'] == 'category') {
aea4df41 1286 grade_tree::no_outcomes($element['children'][$sortorder]);
1287 }
1288 }
1289 }
1290
7a6b7acf 1291 /**
1292 * Static recursive helper - makes the grade_item for category the last children
1293 * @static
1294 * @param array $element The seed of the recursion
1295 * @return void
1296 */
1297 function category_grade_last(&$element) {
1298 if (empty($element['children'])) {
1299 return;
1300 }
1301 if (count($element['children']) < 2) {
1302 return;
1303 }
3e0e2436 1304 $first_item = reset($element['children']);
4a3dfd9a 1305 if ($first_item['type'] == 'categoryitem' or $first_item['type'] == 'courseitem') {
3e0e2436 1306 // the category item might have been already removed
1307 $order = key($element['children']);
1308 unset($element['children'][$order]);
1309 $element['children'][$order] =& $first_item;
1310 }
206f9953 1311 foreach ($element['children'] as $sortorder => $child) {
7a6b7acf 1312 grade_tree::category_grade_last($element['children'][$sortorder]);
1313 }
1314 }
1315
1316 /**
1317 * Static recursive helper - fills the levels array, useful when accessing tree elements of one level
1318 * @static
1319 * @param int $levels
1320 * @param array $element The seed of the recursion
1321 * @param int $depth
1322 * @return void
1323 */
1324 function fill_levels(&$levels, &$element, $depth) {
1325 if (!array_key_exists($depth, $levels)) {
1326 $levels[$depth] = array();
1327 }
1328
1329 // prepare unique identifier
1330 if ($element['type'] == 'category') {
1331 $element['eid'] = 'c'.$element['object']->id;
1332 } else if (in_array($element['type'], array('item', 'courseitem', 'categoryitem'))) {
1333 $element['eid'] = 'i'.$element['object']->id;
b89a70ce 1334 $this->items[$element['object']->id] =& $element['object'];
7a6b7acf 1335 }
1336
1337 $levels[$depth][] =& $element;
1338 $depth++;
1339 if (empty($element['children'])) {
1340 return;
1341 }
1342 $prev = 0;
1343 foreach ($element['children'] as $sortorder=>$child) {
1344 grade_tree::fill_levels($levels, $element['children'][$sortorder], $depth);
1345 $element['children'][$sortorder]['prev'] = $prev;
1346 $element['children'][$sortorder]['next'] = 0;
1347 if ($prev) {
1348 $element['children'][$prev]['next'] = $sortorder;
1349 }
1350 $prev = $sortorder;
1351 }
1352 }
1353
1354 /**
1355 * Static recursive helper - makes full tree (all leafes are at the same level)
1356 */
1357 function inject_fillers(&$element, $depth) {
1358 $depth++;
1359
1360 if (empty($element['children'])) {
1361 return $depth;
1362 }
1363 $chdepths = array();
1364 $chids = array_keys($element['children']);
1365 $last_child = end($chids);
1366 $first_child = reset($chids);
1367
1368 foreach ($chids as $chid) {
1369 $chdepths[$chid] = grade_tree::inject_fillers($element['children'][$chid], $depth);
1370 }
1371 arsort($chdepths);
1372
1373 $maxdepth = reset($chdepths);
1374 foreach ($chdepths as $chid=>$chd) {
1375 if ($chd == $maxdepth) {
1376 continue;
1377 }
1378 for ($i=0; $i < $maxdepth-$chd; $i++) {
1379 if ($chid == $first_child) {
1380 $type = 'fillerfirst';
1381 } else if ($chid == $last_child) {
1382 $type = 'fillerlast';
1383 } else {
1384 $type = 'filler';
1385 }
1386 $oldchild =& $element['children'][$chid];
1387 $element['children'][$chid] = array('object'=>'filler', 'type'=>$type, 'eid'=>'', 'depth'=>$element['object']->depth,'children'=>array($oldchild));
1388 }
1389 }
1390
1391 return $maxdepth;
1392 }
1393
1394 /**
1395 * Static recursive helper - add colspan information into categories
1396 */
1397 function inject_colspans(&$element) {
1398 if (empty($element['children'])) {
1399 return 1;
1400 }
1401 $count = 0;
1402 foreach ($element['children'] as $key=>$child) {
1403 $count += grade_tree::inject_colspans($element['children'][$key]);
1404 }
1405 $element['colspan'] = $count;
1406 return $count;
1407 }
1408
1409 /**
1410 * Parses the array in search of a given eid and returns a element object with
1411 * information about the element it has found.
1412 * @param int $eid
1413 * @return object element
1414 */
1415 function locate_element($eid) {
d3c3da1b 1416 // it is a grade - construct a new object
1417 if (strpos($eid, 'n') === 0) {
1418 if (!preg_match('/n(\d+)u(\d+)/', $eid, $matches)) {
1419 return null;
1420 }
1421
1422 $itemid = $matches[1];
1423 $userid = $matches[2];
1424
1425 //extra security check - the grade item must be in this tree
1426 if (!$item_el = $this->locate_element('i'.$itemid)) {
1427 return null;
1428 }
1429
1430 // $gradea->id may be null - means does not exist yet
1431 $grade = new grade_grade(array('itemid'=>$itemid, 'userid'=>$userid));
1432
1433 $grade->grade_item =& $item_el['object']; // this may speedup grade_grade methods!
1434 return array('eid'=>'n'.$itemid.'u'.$userid,'object'=>$grade, 'type'=>'grade');
1435
1436 } else if (strpos($eid, 'g') === 0) {
7a6b7acf 1437 $id = (int)substr($eid, 1);
1438 if (!$grade = grade_grade::fetch(array('id'=>$id))) {
1439 return null;
1440 }
1441 //extra security check - the grade item must be in this tree
1442 if (!$item_el = $this->locate_element('i'.$grade->itemid)) {
1443 return null;
1444 }
1445 $grade->grade_item =& $item_el['object']; // this may speedup grade_grade methods!
1446 return array('eid'=>'g'.$id,'object'=>$grade, 'type'=>'grade');
1447 }
1448
1449 // it is a category or item
1450 foreach ($this->levels as $row) {
1451 foreach ($row as $element) {
1452 if ($element['type'] == 'filler') {
1453 continue;
1454 }
1455 if ($element['eid'] == $eid) {
1456 return $element;
1457 }
1458 }
1459 }
1460
1461 return null;
1462 }
7a6b7acf 1463}
1464
e2008be2 1465?>
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