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[moodle.git] / lib / gradelib.php
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5834dcdb 1<?php // $Id$
2
3///////////////////////////////////////////////////////////////////////////
4// //
5// NOTICE OF COPYRIGHT //
6// //
7// Moodle - Modular Object-Oriented Dynamic Learning Environment //
8// http://moodle.com //
9// //
10// Copyright (C) 2001-2003 Martin Dougiamas http://dougiamas.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
26/**
42bbccd7 27 * Library of functions for gradebook
5834dcdb 28 *
29 * @author Moodle HQ developers
30 * @version $Id$
31 * @license http://www.gnu.org/copyleft/gpl.html GNU Public License
32 * @package moodlecore
33 */
34
eacd3700 35// category aggregation types
b8ff92b6 36define('GRADE_AGGREGATE_MEAN_ALL', 0);
9580a21f 37define('GRADE_AGGREGATE_MEAN_GRADED', 1);
eacd3700 38define('GRADE_AGGREGATE_MEDIAN_ALL', 2);
39define('GRADE_AGGREGATE_MEDIAN_GRADED', 3);
40define('GRADE_AGGREGATE_MIN_ALL', 4);
41define('GRADE_AGGREGATE_MIN_GRADED', 5);
42define('GRADE_AGGREGATE_MAX_ALL', 6);
43define('GRADE_AGGREGATE_MAX_GRADED', 7);
44define('GRADE_AGGREGATE_MODE_ALL', 8);
45define('GRADE_AGGREGATE_MODE_GRADED', 9);
46define('GRADE_AGGREGATE_WEIGHTED_MEAN_ALL', 10);
47define('GRADE_AGGREGATE_WEIGHTED_MEAN_GRADED', 11);
48define('GRADE_AGGREGATE_EXTRACREDIT_MEAN_ALL', 12);
49define('GRADE_AGGREGATE_EXTRACREDIT_MEAN_GRADED', 13);
50
51// grade types
210611f6 52define('GRADE_TYPE_NONE', 0);
53define('GRADE_TYPE_VALUE', 1);
54define('GRADE_TYPE_SCALE', 2);
55define('GRADE_TYPE_TEXT', 3);
42bbccd7 56
eacd3700 57// grade_update() return status
612607bd 58define('GRADE_UPDATE_OK', 0);
59define('GRADE_UPDATE_FAILED', 1);
60define('GRADE_UPDATE_MULTIPLE', 2);
61define('GRADE_UPDATE_ITEM_DELETED', 3);
4cf1b9be 62define('GRADE_UPDATE_ITEM_LOCKED', 4);
612607bd 63
aaff71da 64// Grate teables history tracking actions
65define('GRADE_HISTORY_INSERT', 1);
66define('GRADE_HISTORY_UPDATE', 2);
67define('GRADE_HISTORY_DELETE', 3);
68
bb384a8e 69define('GRADE_REPORT_AGGREGATION_POSITION_LEFT', 0);
70define('GRADE_REPORT_AGGREGATION_POSITION_RIGHT', 1);
71define('GRADE_REPORT_AGGREGATION_VIEW_FULL', 0);
72define('GRADE_REPORT_AGGREGATION_VIEW_COMPACT', 1);
db4c7968 73define('GRADE_REPORT_GRADE_DISPLAY_TYPE_REAL', 0);
bb384a8e 74define('GRADE_REPORT_GRADE_DISPLAY_TYPE_PERCENTAGE', 1);
db4c7968 75define('GRADE_REPORT_GRADE_DISPLAY_TYPE_LETTER', 2);
e50ce569 76define('GRADE_REPORT_PREFERENCE_DEFAULT', 'default');
77define('GRADE_REPORT_PREFERENCE_INHERIT', 'inherit');
32b97bb2 78define('GRADE_REPORT_PREFERENCE_UNUSED', -1);
eea6690a 79
3058964f 80require_once($CFG->libdir . '/grade/grade_category.php');
81require_once($CFG->libdir . '/grade/grade_item.php');
3ee5c201 82require_once($CFG->libdir . '/grade/grade_grade.php');
d5bdb228 83require_once($CFG->libdir . '/grade/grade_scale.php');
5501446d 84require_once($CFG->libdir . '/grade/grade_outcome.php');
3ee5c201 85require_once($CFG->libdir . '/grade/grade_grade_text.php');
60cf7430 86
612607bd 87/***** PUBLIC GRADE API *****/
88
c5b5f18d 89/**
90 * Submit new or update grade; update/create grade_item definition. Grade must have userid specified,
ac9b0805 91 * rawgrade and feedback with format are optional. rawgrade NULL means 'Not graded', missing property
c5b5f18d 92 * or key means do not change existing.
4cf1b9be 93 *
c5b5f18d 94 * Only following grade item properties can be changed 'itemname', 'idnumber', 'gradetype', 'grademax',
e648f890 95 * 'grademin', 'scaleid', 'multfactor', 'plusfactor', 'deleted'.
4cf1b9be 96 *
c5b5f18d 97 * @param string $source source of the grade such as 'mod/assignment', often used to prevent infinite loops when processing grade_updated events
98 * @param int $courseid id of course
99 * @param string $itemtype type of grade item - mod, block, gradecategory, calculated
100 * @param string $itemmodule more specific then $itemtype - assignment, forum, etc.; maybe NULL for some item types
101 * @param int $iteminstance instance it of graded subject
102 * @param int $itemnumber most probably 0, modules can use other numbers when having more than one grades for each user
103 * @param mixed $grades grade (object, array) or several grades (arrays of arrays or objects), NULL if updating rgade_item definition only\
104 * @param mixed $itemdetails object or array describing the grading item, NULL if no change
105 */
b67ec72f 106function grade_update($source, $courseid, $itemtype, $itemmodule, $iteminstance, $itemnumber, $grades=NULL, $itemdetails=NULL) {
aaff71da 107 global $USER;
612607bd 108
c5b5f18d 109 // only following grade_item properties can be changed in this function
e648f890 110 $allowed = array('itemname', 'idnumber', 'gradetype', 'grademax', 'grademin', 'scaleid', 'multfactor', 'plusfactor', 'deleted');
612607bd 111
c4e4068f 112 // grade item identification
113 $params = compact('courseid', 'itemtype', 'itemmodule', 'iteminstance', 'itemnumber');
114
612607bd 115 if (is_null($courseid) or is_null($itemtype)) {
116 debugging('Missing courseid or itemtype');
117 return GRADE_UPDATE_FAILED;
118 }
119
c4e4068f 120 if (!$grade_items = grade_item::fetch_all($params)) {
612607bd 121 // create a new one
122 $grade_item = false;
123
124 } else if (count($grade_items) == 1){
125 $grade_item = reset($grade_items);
126 unset($grade_items); //release memory
127
128 } else {
34e67f76 129 debugging('Found more than one grade item');
612607bd 130 return GRADE_UPDATE_MULTIPLE;
131 }
132
aaff71da 133 if (!empty($itemdetails['deleted'])) {
134 if ($grade_item) {
135 if ($grade_item->delete($source)) {
136 return GRADE_UPDATE_OK;
137 } else {
138 return GRADE_UPDATE_FAILED;
139 }
140 }
141 return GRADE_UPDATE_OK;
142 }
143
612607bd 144/// Create or update the grade_item if needed
145 if (!$grade_item) {
612607bd 146 if ($itemdetails) {
147 $itemdetails = (array)$itemdetails;
2e53372c 148
772ddfbf 149 // grademin and grademax ignored when scale specified
2e53372c 150 if (array_key_exists('scaleid', $itemdetails)) {
151 if ($itemdetails['scaleid']) {
152 unset($itemdetails['grademin']);
153 unset($itemdetails['grademax']);
154 }
155 }
156
612607bd 157 foreach ($itemdetails as $k=>$v) {
158 if (!in_array($k, $allowed)) {
159 // ignore it
160 continue;
161 }
162 if ($k == 'gradetype' and $v == GRADE_TYPE_NONE) {
163 // no grade item needed!
164 return GRADE_UPDATE_OK;
165 }
166 $params[$k] = $v;
167 }
168 }
f70152b7 169 $grade_item = new grade_item($params);
170 $grade_item->insert();
612607bd 171
172 } else {
2cc4b0f9 173 if ($grade_item->is_locked()) {
612607bd 174 debugging('Grading item is locked!');
4cf1b9be 175 return GRADE_UPDATE_ITEM_LOCKED;
612607bd 176 }
177
178 if ($itemdetails) {
179 $itemdetails = (array)$itemdetails;
180 $update = false;
181 foreach ($itemdetails as $k=>$v) {
182 if (!in_array($k, $allowed)) {
183 // ignore it
184 continue;
185 }
186 if ($grade_item->{$k} != $v) {
187 $grade_item->{$k} = $v;
188 $update = true;
189 }
190 }
191 if ($update) {
192 $grade_item->update();
193 }
194 }
195 }
196
197/// Some extra checks
198 // do we use grading?
199 if ($grade_item->gradetype == GRADE_TYPE_NONE) {
200 return GRADE_UPDATE_OK;
201 }
202
203 // no grade submitted
b67ec72f 204 if (empty($grades)) {
612607bd 205 return GRADE_UPDATE_OK;
206 }
207
612607bd 208/// Finally start processing of grades
b67ec72f 209 if (is_object($grades)) {
210 $grades = array($grades);
612607bd 211 } else {
b67ec72f 212 if (array_key_exists('userid', $grades)) {
213 $grades = array($grades);
612607bd 214 }
215 }
216
4cf1b9be 217 $failed = false;
612607bd 218 foreach ($grades as $grade) {
219 $grade = (array)$grade;
220 if (empty($grade['userid'])) {
4cf1b9be 221 $failed = true;
222 debugging('Invalid userid in grade submitted');
223 continue;
ac9b0805 224 } else {
225 $userid = $grade['userid'];
612607bd 226 }
227
2cc4b0f9 228 $rawgrade = false;
ac9b0805 229 $feedback = false;
230 $feedbackformat = FORMAT_MOODLE;
772ddfbf 231
ac9b0805 232 if (array_key_exists('rawgrade', $grade)) {
233 $rawgrade = $grade['rawgrade'];
234 }
612607bd 235
4cf1b9be 236 if (array_key_exists('feedback', $grade)) {
ac9b0805 237 $feedback = $grade['feedback'];
612607bd 238 }
239
ac9b0805 240 if (array_key_exists('feedbackformat', $grade)) {
241 $feedbackformat = $grade['feedbackformat'];
612607bd 242 }
243
aaff71da 244 if (array_key_exists('usermodified', $grade)) {
245 $usermodified = $grade['usermodified'];
246 } else {
247 $usermodified = $USER->id;
248 }
249
ac9b0805 250 // update or insert the grade
aaff71da 251 if (!$grade_item->update_raw_grade($userid, $rawgrade, $source, null, $feedback, $feedbackformat, $usermodified)) {
4cf1b9be 252 $failed = true;
4cf1b9be 253 }
612607bd 254 }
255
4cf1b9be 256 if (!$failed) {
257 return GRADE_UPDATE_OK;
258 } else {
259 return GRADE_UPDATE_FAILED;
260 }
612607bd 261}
262
b67ec72f 263
264/**
265* Tells a module whether a grade (or grade_item if $userid is not given) is currently locked or not.
266* This is a combination of the actual settings in the grade tables and a check on moodle/course:editgradeswhenlocked.
267* If it's locked to the current use then the module can print a nice message or prevent editing in the module.
268* If no $userid is given, the method will always return the grade_item's locked state.
269* If a $userid is given, the method will first check the grade_item's locked state (the column). If it is locked,
270* the method will return true no matter the locked state of the specific grade being checked. If unlocked, it will
271* return the locked state of the specific grade.
272*
34e67f76 273* @param int $courseid id of course
b67ec72f 274* @param string $itemtype 'mod', 'blocks', 'import', 'calculated' etc
275* @param string $itemmodule 'forum, 'quiz', 'csv' etc
276* @param int $iteminstance id of the item module
34e67f76 277* @param int $itemnumber most probably 0, modules can use other numbers when having more than one grades for each user
278* @param int $userid ID of the graded user
b67ec72f 279* @return boolean Whether the grade is locked or not
280*/
34e67f76 281function grade_is_locked($courseid, $itemtype, $itemmodule, $iteminstance, $itemnumber, $userid=NULL) {
b67ec72f 282
f92dcad8 283 if (!$grade_items = grade_item::fetch_all(compact('courseid', 'itemtype', 'itemmodule', 'iteminstance', 'itemnumber'))) {
34e67f76 284 return false;
285
286 } else if (count($grade_items) == 1){
287 $grade_item = reset($grade_items);
288 return $grade_item->is_locked($userid);
289
290 } else {
291 debugging('Found more than one grade item');
292 foreach ($grade_items as $grade_item) {
293 if ($grade_item->is_locked($userid)) {
294 return true;
295 }
296 }
297 return false;
298 }
299}
b67ec72f 300
612607bd 301/***** END OF PUBLIC API *****/
302
f8e6e4db 303function grade_force_full_regrading($courseid) {
304 set_field('grade_items', 'needsupdate', 1, 'courseid', $courseid);
305}
34e67f76 306
5834dcdb 307/**
ac9b0805 308 * Updates all final grades in course.
a8995b34 309 *
310 * @param int $courseid
f8e6e4db 311 * @param int $userid if specified, try to do a quick regrading of grades of this user only
312 * @param object $updated_item the item in which
313 * @return boolean true if ok, array of errors if problems found (item id is used as key)
a8995b34 314 */
c86caae7 315function grade_regrade_final_grades($courseid, $userid=null, $updated_item=null) {
b8ff92b6 316
514a3467 317 $course_item = grade_item::fetch_course_item($courseid);
f04873a9 318
f8e6e4db 319 if ($userid) {
320 // one raw grade updated for one user
321 if (empty($updated_item)) {
322 error("updated_item_id can not be null!");
323 }
324 if ($course_item->needsupdate) {
325 $updated_item->force_regrading();
326 return 'Can not do fast regrading after updating of raw grades';
a8995b34 327 }
772ddfbf 328
f8e6e4db 329 } else {
330 if (!$course_item->needsupdate) {
331 // nothing to do :-)
b8ff92b6 332 return true;
b8ff92b6 333 }
a8995b34 334 }
335
f8e6e4db 336 $grade_items = grade_item::fetch_all(array('courseid'=>$courseid));
337 $depends_on = array();
338
339 // first mark all category and calculated items as needing regrading
340 // this is slower, but 100% accurate - this function is called only when there is
341 // a change in grading setup, update of individual grade does not trigger this function
342 foreach ($grade_items as $gid=>$gitem) {
fb46b5b6 343 if (!empty($updated_item) and $updated_item->id == $gid) {
f8e6e4db 344 $grade_items[$gid]->needsupdate = 1;
345
eacd3700 346 } else if ($gitem->is_course_item() or $gitem->is_category_item() or $gitem->is_calculated()) {
f8e6e4db 347 $grade_items[$gid]->needsupdate = 1;
348 }
2e53372c 349
f8e6e4db 350 // construct depends_on lookup array
351 $depends_on[$gid] = $grade_items[$gid]->depends_on();
352 }
2e53372c 353
d14ae855 354 $errors = array();
b8ff92b6 355 $finalids = array();
d14ae855 356 $gids = array_keys($grade_items);
eacd3700 357 $failed = 0;
d14ae855 358
359 while (count($finalids) < count($gids)) { // work until all grades are final or error found
360 $count = 0;
361 foreach ($gids as $gid) {
362 if (in_array($gid, $finalids)) {
363 continue; // already final
364 }
365
366 if (!$grade_items[$gid]->needsupdate) {
367 $finalids[] = $gid; // we can make it final - does not need update
b8ff92b6 368 continue;
369 }
370
b8ff92b6 371 $doupdate = true;
f8e6e4db 372 foreach ($depends_on[$gid] as $did) {
b8ff92b6 373 if (!in_array($did, $finalids)) {
374 $doupdate = false;
d14ae855 375 continue; // this item depends on something that is not yet in finals array
b8ff92b6 376 }
377 }
378
379 //oki - let's update, calculate or aggregate :-)
380 if ($doupdate) {
d14ae855 381 $result = $grade_items[$gid]->regrade_final_grades($userid);
f8e6e4db 382
383 if ($result === true) {
d14ae855 384 $grade_items[$gid]->regrading_finished();
f8e6e4db 385 $count++;
b8ff92b6 386 $finalids[] = $gid;
f8e6e4db 387 } else {
d14ae855 388 $grade_items[$gid]->force_regrading();
f8e6e4db 389 $errors[$gid] = $result;
b8ff92b6 390 }
391 }
392 }
393
394 if ($count == 0) {
eacd3700 395 $failed++;
396 } else {
397 $failed = 0;
398 }
399
400 if ($failed > 1) {
d14ae855 401 foreach($gids as $gid) {
402 if (in_array($gid, $finalids)) {
403 continue; // this one is ok
404 }
405 $grade_items[$gid]->force_regrading();
406 $errors[$grade_items[$gid]->id] = 'Probably circular reference or broken calculation formula'; // TODO: localize
b8ff92b6 407 }
d14ae855 408 break; // oki, found error
b8ff92b6 409 }
410 }
411
412 if (count($errors) == 0) {
413 return true;
414 } else {
415 return $errors;
416 }
a8995b34 417}
967f222f 418
de420c11 419/**
d185c3ee 420 * For backwards compatibility with old third-party modules, this function can
421 * be used to import all grades from activities with legacy grading.
739196ba 422 * @param int $courseid or null if all courses
967f222f 423 */
739196ba 424function grade_grab_legacy_grades($courseid=null) {
612607bd 425
ac9b0805 426 global $CFG;
967f222f 427
428 if (!$mods = get_list_of_plugins('mod') ) {
429 error('No modules installed!');
430 }
431
739196ba 432 if ($courseid) {
433 $course_sql = " AND cm.course=$courseid";
434 } else {
435 $course_sql = "";
436 }
437
967f222f 438 foreach ($mods as $mod) {
439
440 if ($mod == 'NEWMODULE') { // Someone has unzipped the template, ignore it
441 continue;
442 }
443
d185c3ee 444 if (!$module = get_record('modules', 'name', $mod)) {
445 //not installed
446 continue;
447 }
448
449 if (!$module->visible) {
450 //disabled module
451 continue;
452 }
453
454 $fullmod = $CFG->dirroot.'/mod/'.$mod;
967f222f 455
456 // include the module lib once
457 if (file_exists($fullmod.'/lib.php')) {
458 include_once($fullmod.'/lib.php');
de420c11 459 // look for modname_grades() function - old gradebook pulling function
460 // if present sync the grades with new grading system
967f222f 461 $gradefunc = $mod.'_grades';
de420c11 462 if (function_exists($gradefunc)) {
463
464 // get all instance of the activity
d185c3ee 465 $sql = "SELECT a.*, cm.idnumber as cmidnumber, m.name as modname
466 FROM {$CFG->prefix}$mod a, {$CFG->prefix}course_modules cm, {$CFG->prefix}modules m
739196ba 467 WHERE m.name='$mod' AND m.id=cm.module AND cm.instance=a.id $course_sql";
de420c11 468
469 if ($modinstances = get_records_sql($sql)) {
967f222f 470 foreach ($modinstances as $modinstance) {
d185c3ee 471 grade_update_mod_grades($modinstance);
967f222f 472 }
473 }
474 }
475 }
476 }
477}
478
ac9b0805 479/**
480 * For testing purposes mainly, reloads grades from all non legacy modules into gradebook.
481 */
482function grade_grab_grades() {
483
484 global $CFG;
485
486 if (!$mods = get_list_of_plugins('mod') ) {
487 error('No modules installed!');
488 }
489
490 foreach ($mods as $mod) {
491
492 if ($mod == 'NEWMODULE') { // Someone has unzipped the template, ignore it
493 continue;
494 }
495
496 if (!$module = get_record('modules', 'name', $mod)) {
497 //not installed
498 continue;
499 }
500
501 if (!$module->visible) {
502 //disabled module
503 continue;
504 }
505
506 $fullmod = $CFG->dirroot.'/mod/'.$mod;
507
508 // include the module lib once
509 if (file_exists($fullmod.'/lib.php')) {
510 include_once($fullmod.'/lib.php');
511 // look for modname_grades() function - old gradebook pulling function
512 // if present sync the grades with new grading system
513 $gradefunc = $mod.'_update_grades';
514 if (function_exists($gradefunc)) {
515 $gradefunc();
516 }
517 }
518 }
519}
520
d185c3ee 521/**
522 * Force full update of module grades in central gradebook - works for both legacy and converted activities.
523 * @param object $modinstance object with extra cmidnumber and modname property
524 * @return boolean success
525 */
526function grade_update_mod_grades($modinstance) {
527 global $CFG;
528
529 $fullmod = $CFG->dirroot.'/mod/'.$modinstance->modname;
530 if (!file_exists($fullmod.'/lib.php')) {
531 debugging('missing lib.php file in module');
532 return false;
533 }
534 include_once($fullmod.'/lib.php');
535
536 // does it use legacy grading?
537 $gradefunc = $modinstance->modname.'_grades';
538 $updategradesfunc = $modinstance->modname.'_update_grades';
539 $updateitemfunc = $modinstance->modname.'_grade_item_update';
540
541 if (function_exists($gradefunc)) {
542 if ($oldgrades = $gradefunc($modinstance->id)) {
543
544 $grademax = $oldgrades->maxgrade;
545 $scaleid = NULL;
546 if (!is_numeric($grademax)) {
547 // scale name is provided as a string, try to find it
548 if (!$scale = get_record('scale', 'name', $grademax)) {
549 debugging('Incorrect scale name! name:'.$grademax);
550 return false;
551 }
552 $scaleid = $scale->id;
553 }
554
555 if (!$grade_item = grade_get_legacy_grade_item($modinstance, $grademax, $scaleid)) {
556 debugging('Can not get/create legacy grade item!');
557 return false;
558 }
559
560 $grades = array();
561 foreach ($oldgrades->grades as $userid=>$usergrade) {
562 $grade = new object();
563 $grade->userid = $userid;
564
565 if ($usergrade == '-') {
566 // no grade
ac9b0805 567 $grade->rawgrade = null;
d185c3ee 568
569 } else if ($scaleid) {
570 // scale in use, words used
571 $gradescale = explode(",", $scale->scale);
ac9b0805 572 $grade->rawgrade = array_search($usergrade, $gradescale) + 1;
d185c3ee 573
574 } else {
575 // good old numeric value
ac9b0805 576 $grade->rawgrade = $usergrade;
d185c3ee 577 }
578 $grades[] = $grade;
579 }
580
581 grade_update('legacygrab', $grade_item->courseid, $grade_item->itemtype, $grade_item->itemmodule,
582 $grade_item->iteminstance, $grade_item->itemnumber, $grades);
583 }
584
585 } else if (function_exists($updategradesfunc) and function_exists($updateitemfunc)) {
586 //new grading supported, force updating of grades
587 $updateitemfunc($modinstance);
588 $updategradesfunc($modinstance);
589
590 } else {
591 // mudule does not support grading
592 }
593
594 return true;
595}
de420c11 596
597/**
d185c3ee 598 * Get and update/create grade item for legacy modules.
de420c11 599 */
600function grade_get_legacy_grade_item($modinstance, $grademax, $scaleid) {
601
602 // does it already exist?
42ff9ce6 603 if ($grade_items = grade_item::fetch_all(array('courseid'=>$modinstance->course, 'itemtype'=>'mod', 'itemmodule'=>$modinstance->modname, 'iteminstance'=>$modinstance->id, 'itemnumber'=>0))) {
de420c11 604 if (count($grade_items) > 1) {
d185c3ee 605 debugging('Multiple legacy grade_items found.');
de420c11 606 return false;
607 }
608
609 $grade_item = reset($grade_items);
de420c11 610
d185c3ee 611 if (is_null($grademax) and is_null($scaleid)) {
612 $grade_item->gradetype = GRADE_TYPE_NONE;
de420c11 613
d185c3ee 614 } else if ($scaleid) {
615 $grade_item->gradetype = GRADE_TYPE_SCALE;
616 $grade_item->scaleid = $scaleid;
97d608ba 617 $grade_item->grademin = 1;
de420c11 618
d185c3ee 619 } else {
97d608ba 620 $grade_item->gradetype = GRADE_TYPE_VALUE;
621 $grade_item->grademax = $grademax;
622 $grade_item->grademin = 0;
de420c11 623 }
624
d185c3ee 625 $grade_item->itemname = $modinstance->name;
626 $grade_item->idnumber = $modinstance->cmidnumber;
de420c11 627
d185c3ee 628 $grade_item->update();
de420c11 629
630 return $grade_item;
631 }
612607bd 632
de420c11 633 // create new one
d185c3ee 634 $params = array('courseid' =>$modinstance->course,
de420c11 635 'itemtype' =>'mod',
636 'itemmodule' =>$modinstance->modname,
637 'iteminstance'=>$modinstance->id,
d185c3ee 638 'itemnumber' =>0,
de420c11 639 'itemname' =>$modinstance->name,
640 'idnumber' =>$modinstance->cmidnumber);
641
d185c3ee 642 if (is_null($grademax) and is_null($scaleid)) {
643 $params['gradetype'] = GRADE_TYPE_NONE;
644
645 } else if ($scaleid) {
612607bd 646 $params['gradetype'] = GRADE_TYPE_SCALE;
de420c11 647 $params['scaleid'] = $scaleid;
b3ac6c3e 648 $grade_item->grademin = 1;
de420c11 649 } else {
612607bd 650 $params['gradetype'] = GRADE_TYPE_VALUE;
de420c11 651 $params['grademax'] = $grademax;
652 $params['grademin'] = 0;
653 }
654
f70152b7 655 $grade_item = new grade_item($params);
656 $grade_item->insert();
de420c11 657
f70152b7 658 return $grade_item;
de420c11 659}
660
bfe7297e 661
32b97bb2 662/**
663 * Builds an array of percentages indexed by integers for the purpose of building a select drop-down element.
664 * @param int $steps The value between each level.
665 * @param string $order 'asc' for 0-100 and 'desc' for 100-0
666 * @param int $lowest The lowest value to include
667 * @param int $highest The highest value to include
668 */
669function build_percentages_array($steps=1, $order='desc', $lowest=0, $highest=100) {
670 // TODO reject or implement
671}
42ff9ce6 672
60cf7430 673?>