mirrored from git://git.moodle.org/moodle.git
-
Notifications
You must be signed in to change notification settings - Fork 6.4k
/
enrol.php
655 lines (555 loc) · 25.5 KB
/
enrol.php
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
<?php // $Id$
require_once($CFG->dirroot.'/enrol/enrol.class.php');
class enrolment_plugin_database {
var $log;
/*
* For the given user, let's go out and look in an external database
* for an authoritative list of enrolments, and then adjust the
* local Moodle assignments to match.
*/
function setup_enrolments(&$user) {
global $CFG;
// NOTE: if $this->enrol_connect() succeeds you MUST remember to call
// $this->enrol_disconnect() as it is doing some nasty vodoo with $CFG->prefix
$enroldb = $this->enrol_connect();
if (!$enroldb) {
error_log('[ENROL_DB] Could not make a connection');
return;
}
// If we are expecting to get role information from our remote db, then
// we execute the below code for every role type. Otherwise we just
// execute it once with null (hence the dummy array).
$roles = !empty($CFG->enrol_db_remoterolefield) && !empty($CFG->enrol_db_localrolefield)
? get_records('role')
: array(null);
//error_log('[ENROL_DB] found ' . count($roles) . ' roles:');
foreach($roles as $role) {
//error_log('[ENROL_DB] setting up enrolments for '.$role->shortname);
/// Get the authoritative list of enrolments from the external database table
/// We're using the ADOdb functions natively here and not our datalib functions
/// because we didn't want to mess with the $db global
$useridfield = $enroldb->quote($user->{$CFG->enrol_localuserfield});
list($have_role, $remote_role_name, $remote_role_value) = $this->role_fields($enroldb, $role);
/// Check if a particular role has been forced by the plugin site-wide
/// (if we aren't doing a role-based select)
if (!$have_role && $CFG->enrol_db_defaultcourseroleid) {
$role = get_record('role', 'id', $CFG->enrol_db_defaultcourseroleid);
}
/// Whether to fetch the default role on a per-course basis (below) or not.
$use_default_role = !$role;
/*
if ($have_role) {
error_log('[ENROL_DB] Doing role-specific select from db for role: '.$role->shortname);
} elseif ($use_default_role) {
error_log('[ENROL_DB] Using course default for roles - assuming that database lists defaults');
} else {
error_log('[ENROL_DB] Using config default for roles: '.$role->shortname);
}*/
if ($rs = $enroldb->Execute("SELECT {$CFG->enrol_remotecoursefield} as enrolremotecoursefield
FROM {$CFG->enrol_dbtable}
WHERE {$CFG->enrol_remoteuserfield} = " . $useridfield .
(isset($remote_role_name, $remote_role_value) ? ' AND '.$remote_role_name.' = '.$remote_role_value : ''))) {
// We'll use this to see what to add and remove
$existing = $role
? get_records_sql("
SELECT * FROM {$CFG->prefix}role_assignments
WHERE userid = {$user->id}
AND roleid = {$role->id}")
: get_records('role_assignments', 'userid', $user->id);
if (!$existing) {
$existing = array();
}
//error_log('[ENROL_DB] Found '.count($existing).' existing roles and '.$rs->RecordCount().' in external database');
if ($rs->RecordCount() > 0) { // We found some courses
$courselist = array();
while ($fields_obj = rs_fetch_next_record($rs)) { // Make a nice little array of courses to process
$courselist[] = $fields_obj->enrolremotecoursefield;
}
rs_close($rs);
foreach ($courselist as $coursefield) { /// Check the list of courses against existing
$course = get_record('course', $CFG->enrol_localcoursefield, $coursefield);
if (!is_object($course)) {
if (empty($CFG->enrol_db_autocreate)) { // autocreation not allowed
print "Course $coursefield does not exist, skipping\n";
continue; // next foreach course
}
// ok, now then let's create it!
print "Creating Course $coursefield...";
// prepare any course properties we actually have
$course = new StdClass;
$course->{$CFG->enrol_localcoursefield} = $coursefield;
$course->fullname = $coursefield;
$course->shortname = $coursefield;
if ($newcourseid = $this->create_course($course, true)
and $course = get_record( 'course', 'id', $newcourseid)) {
// we are skipping fix_course_sortorder()
print "created\n";
} else {
print "failed\n";
continue; // nothing left to do...
}
}
/// If there's no role specified, we get the default course role (usually student)
if ($use_default_role) {
$role = get_default_course_role($course);
}
$context = get_context_instance(CONTEXT_COURSE, $course->id);
// Couldn't get a role or context, skip.
if (!$role || !$context) {
continue;
}
// Search the role assignments to see if this user
// already has this role in this context. If it is, we
// skip to the next course.
foreach($existing as $key => $role_assignment) {
if ($role_assignment->roleid == $role->id
&& $role_assignment->contextid == $context->id) {
unset($existing[$key]);
//error_log('[ENROL_DB] User is already enroled in course '.$course->idnumber);
continue 2;
}
}
//error_log('[ENROL_DB] Enrolling user in course '.$course->idnumber);
role_assign($role->id, $user->id, 0, $context->id, 0, 0, 0, 'database');
}
} // We've processed all external courses found
/// We have some courses left that we might need to unenrol from
/// Note: we only process enrolments that we (ie 'database' plugin) made
foreach ($existing as $role_assignment) {
if ($role_assignment->enrol == 'database') {
//error_log('[ENROL_DB] Removing user from context '.$role_assignment->contextid);
role_unassign($role_assignment->roleid, $user->id, '', $role_assignment->contextid);
}
}
} else {
error_log('[ENROL_DB] Couldn\'t get rows from external db: '.$enroldb->ErrorMsg());
}
}
$this->enrol_disconnect($enroldb);
}
/**
* sync enrolments with database, create courses if required.
*
* @param object The role to sync for. If no role is specified, defaults are
* used.
*/
function sync_enrolments($role = null) {
global $CFG;
global $db;
error_reporting(E_ALL);
// Connect to the external database
$enroldb = $this->enrol_connect();
if (!$enroldb) {
notify("enrol/database cannot connect to server");
return false;
}
if (isset($role)) {
echo '=== Syncing enrolments for role: '.$role->shortname." ===\n";
} else {
echo "=== Syncing enrolments for default role ===\n";
}
// first, pack the sortorder...
fix_course_sortorder();
list($have_role, $remote_role_name, $remote_role_value) = $this->role_fields($enroldb, $role);
if (!$have_role) {
if (!empty($CFG->enrol_db_defaultcourseroleid)
and $role = get_record('role', 'id', $CFG->enrol_db_defaultcourseroleid)) {
echo "=== Using enrol_db_defaultcourseroleid: {$role->id} ({$role->shortname}) ===\n";
} elseif (isset($role)) {
echo "!!! WARNING: Role specified by caller, but no (or invalid) role configuration !!!\n";
}
}
// get enrolments per-course
$sql = "SELECT DISTINCT {$CFG->enrol_remotecoursefield} " .
" FROM {$CFG->enrol_dbtable} " .
" WHERE {$CFG->enrol_remoteuserfield} IS NOT NULL" .
(isset($remote_role_name, $remote_role_value) ? ' AND '.$remote_role_name.' = '.$remote_role_value : '');
$rs = $enroldb->Execute($sql);
if (!$rs) {
trigger_error($enroldb->ErrorMsg() .' STATEMENT: '. $sql);
return false;
}
if ( $rs->RecordCount() == 0 ) { // no courses! outta here...
return true;
}
begin_sql();
$extcourses = array();
while ($extcourse_obj = rs_fetch_next_record($rs)) { // there are more course records
$extcourse = $extcourse_obj->{$CFG->enrol_remotecoursefield};
array_push($extcourses, $extcourse);
print "course $extcourse\n";
// does the course exist in moodle already?
$course = false;
$course = get_record( 'course',
$CFG->enrol_localcoursefield,
$extcourse );
if (!is_object($course)) {
if (empty($CFG->enrol_db_autocreate)) { // autocreation not allowed
print "Course $extcourse does not exist, skipping\n";
continue; // next foreach course
}
// ok, now then let's create it!
print "Creating Course $extcourse...";
// prepare any course properties we actually have
$course = new StdClass;
$course->{$CFG->enrol_localcoursefield} = $extcourse;
$course->fullname = $extcourse;
$course->shortname = $extcourse;
if ($newcourseid = $this->create_course($course, true)
and $course = get_record( 'course', 'id', $newcourseid)) {
// we are skipping fix_course_sortorder()
print "created\n";
} else {
print "failed\n";
continue; // nothing left to do...
}
}
$context = get_context_instance(CONTEXT_COURSE, $course->id);
// If we don't have a proper role setup, then we default to the default
// role for the current course.
if (!$have_role) {
$role = get_default_course_role($course);
}
// get a list of the student ids the are enrolled
// in the external db -- hopefully it'll fit in memory...
$extenrolments = array();
$sql = "SELECT {$CFG->enrol_remoteuserfield} " .
" FROM {$CFG->enrol_dbtable} " .
" WHERE {$CFG->enrol_remotecoursefield} = " . $enroldb->quote($extcourse) .
($have_role ? ' AND '.$remote_role_name.' = '.$remote_role_value : '');
$crs = $enroldb->Execute($sql);
if (!$crs) {
trigger_error($enroldb->ErrorMsg() .' STATEMENT: '. $sql);
return false;
}
if ( $crs->RecordCount() == 0 ) { // shouldn't happen, but cover all bases
continue;
}
// slurp results into an array
while ($crs_obj = rs_fetch_next_record($crs)) {
array_push($extenrolments, $crs_obj->{$CFG->enrol_remoteuserfield});
}
rs_close($crs); // release the handle
//
// prune enrolments
// hopefully they'll fit in the max buffer size for the RDBMS
//
// TODO: This doesn't work perfectly. If we are operating without
// roles in the external DB, then this doesn't handle changes of role
// within a course (because the user is still enrolled in the course,
// so NOT IN misses the course).
//
// When the user logs in though, their role list will be updated
// correctly.
//
$to_prune = get_records_sql("
SELECT ra.*
FROM {$CFG->prefix}role_assignments ra
JOIN {$CFG->prefix}user u ON ra.userid = u.id
WHERE ra.enrol = 'database'
AND ra.contextid = {$context->id}
AND ra.roleid = ". $role->id . ($extenrolments
? " AND u.{$CFG->enrol_localuserfield} NOT IN (".join(", ", array_map(array(&$db, 'quote'), $extenrolments)).")"
: ''));
if ($to_prune) {
foreach ($to_prune as $role_assignment) {
if (role_unassign($role->id, $role_assignment->userid, 0, $role_assignment->contextid)){
print "Unassigned {$role->shortname} assignment #{$role_assignment->id} for course {$course->id} (" . format_string($course->shortname) . "); user {$role_assignment->userid}\n";
} else {
print "Failed to unassign {$role->shortname} assignment #{$role_assignment->id} for course {$course->id} (" . format_string($course->shortname) . "); user {$role_assignment->userid}\n";
}
}
}
//
// insert current enrolments
// bad we can't do INSERT IGNORE with postgres...
//
foreach ($extenrolments as $member) {
// Get the user id and whether is enrolled in one fell swoop
$sql = "
SELECT u.id AS userid, ra.id AS enrolmentid
FROM {$CFG->prefix}user u
LEFT OUTER JOIN {$CFG->prefix}role_assignments ra ON u.id = ra.userid
AND ra.roleid = {$role->id}
AND ra.contextid = {$context->id}
WHERE u.{$CFG->enrol_localuserfield} = ".$db->quote($member) .
" AND (u.deleted IS NULL OR u.deleted=0) ";
$ers = $db->Execute($sql);
if (!$ers) {
trigger_error($db->ErrorMsg() .' STATEMENT: '. $sql);
return false;
}
if ( $ers->RecordCount() == 0 ) { // if this returns empty, it means we don't have the student record.
// should not happen -- but skip it anyway
trigger_error('weird! no user record entry?');
continue;
}
$user_obj = rs_fetch_record($ers);
$userid = $user_obj->userid;
$enrolmentid = $user_obj->enrolmentid;
rs_close($ers); // release the handle
if ($enrolmentid) { // already enrolled - skip
continue;
}
if (role_assign($role->id, $userid, 0, $context->id, 0, 0, 0, 'database')){
print "Assigned role {$role->shortname} to user {$userid} in course {$course->id} (" . format_string($course->shortname) . ")\n";
} else {
print "Failed to assign role {$role->shortname} to user {$userid} in course {$course->id} (" . format_string($course->shortname) . ")\n";
}
} // end foreach member
} // end while course records
rs_close($rs); //Close the main course recordset
//
// prune enrolments to courses that are no longer in ext auth
//
// TODO: This doesn't work perfectly. If we are operating without
// roles in the external DB, then this doesn't handle changes of role
// within a course (because the user is still enrolled in the course,
// so NOT IN misses the course).
//
// When the user logs in though, their role list will be updated
// correctly.
//
$sql = "
SELECT ra.roleid, ra.userid, ra.contextid
FROM {$CFG->prefix}role_assignments ra
LEFT OUTER JOIN ({$CFG->prefix}context cn
JOIN {$CFG->prefix}course c ON cn.contextlevel = ".CONTEXT_COURSE." AND cn.instanceid = c.id)
ON ra.contextid = cn.id
WHERE ra.enrol = 'database'" .
($have_role ? ' AND ra.roleid = '.$role->id : '') .
($extcourses
? " AND (c.id IS NULL OR c.{$CFG->enrol_localcoursefield} NOT IN (" . join(",", array_map(array(&$db, 'quote'), $extcourses)) . "))"
: '');
$ers = $db->Execute($sql);
if (!$ers) {
trigger_error($db->ErrorMsg() .' STATEMENT: '. $sql);
return false;
}
if ( $ers->RecordCount() > 0 ) {
while ($user_obj = rs_fetch_next_record($ers)) {
$roleid = $user_obj->roleid;
$user = $user_obj->userid;
$contextid = $user_obj->contextid;
if (role_unassign($roleid, $user, 0, $contextid)){
print "Unassigned role {$roleid} from user $user in context $contextid\n";
} else {
print "Failed unassign role {$roleid} from user $user in context $contextid\n";
}
}
rs_close($ers); // release the handle
}
commit_sql();
// we are done now, a bit of housekeeping
fix_course_sortorder();
$this->enrol_disconnect($enroldb);
return true;
}
/// Overide the get_access_icons() function
function get_access_icons($course) {
}
/// Overide the base config_form() function
function config_form($frm) {
global $CFG;
$vars = array('enrol_dbhost', 'enrol_dbuser', 'enrol_dbpass',
'enrol_dbname', 'enrol_dbtable',
'enrol_localcoursefield', 'enrol_localuserfield',
'enrol_remotecoursefield', 'enrol_remoteuserfield',
'enrol_db_autocreate', 'enrol_db_category', 'enrol_db_template',
'enrol_db_localrolefield', 'enrol_db_remoterolefield',
'enrol_remotecoursefield', 'enrol_remoteuserfield');
foreach ($vars as $var) {
if (!isset($frm->$var)) {
$frm->$var = '';
}
}
include("$CFG->dirroot/enrol/database/config.html");
}
/// Override the base process_config() function
function process_config($config) {
if (!isset($config->enrol_dbtype)) {
$config->enrol_dbtype = 'mysql';
}
set_config('enrol_dbtype', $config->enrol_dbtype);
if (!isset($config->enrol_dbhost)) {
$config->enrol_dbhost = '';
}
set_config('enrol_dbhost', $config->enrol_dbhost);
if (!isset($config->enrol_dbuser)) {
$config->enrol_dbuser = '';
}
set_config('enrol_dbuser', $config->enrol_dbuser);
if (!isset($config->enrol_dbpass)) {
$config->enrol_dbpass = '';
}
set_config('enrol_dbpass', $config->enrol_dbpass);
if (!isset($config->enrol_dbname)) {
$config->enrol_dbname = '';
}
set_config('enrol_dbname', $config->enrol_dbname);
if (!isset($config->enrol_dbtable)) {
$config->enrol_dbtable = '';
}
set_config('enrol_dbtable', $config->enrol_dbtable);
if (!isset($config->enrol_localcoursefield)) {
$config->enrol_localcoursefield = '';
}
set_config('enrol_localcoursefield', $config->enrol_localcoursefield);
if (!isset($config->enrol_localuserfield)) {
$config->enrol_localuserfield = '';
}
set_config('enrol_localuserfield', $config->enrol_localuserfield);
if (!isset($config->enrol_remotecoursefield)) {
$config->enrol_remotecoursefield = '';
}
set_config('enrol_remotecoursefield', $config->enrol_remotecoursefield);
if (!isset($config->enrol_remoteuserfield)) {
$config->enrol_remoteuserfield = '';
}
set_config('enrol_remoteuserfield', $config->enrol_remoteuserfield);
if (!isset($config->enrol_db_autocreate)) {
$config->enrol_db_autocreate = '';
}
set_config('enrol_db_autocreate', $config->enrol_db_autocreate);
if (!isset($config->enrol_db_category)) {
$config->enrol_db_category = '';
}
set_config('enrol_db_category', $config->enrol_db_category);
if (!isset($config->enrol_db_template)) {
$config->enrol_db_template = '';
}
set_config('enrol_db_template', $config->enrol_db_template);
if (!isset($config->enrol_db_defaultcourseroleid)) {
$config->enrol_db_defaultcourseroleid = '';
}
set_config('enrol_db_defaultcourseroleid', $config->enrol_db_defaultcourseroleid);
if (!isset($config->enrol_db_localrolefield)) {
$config->enrol_db_localrolefield = '';
}
set_config('enrol_db_localrolefield', $config->enrol_db_localrolefield);
if (!isset($config->enrol_db_remoterolefield)) {
$config->enrol_db_remoterolefield = '';
}
set_config('enrol_db_remoterolefield', $config->enrol_db_remoterolefield);
return true;
}
// will create the moodle course from the template
// course_ext is an array as obtained from ldap -- flattened somewhat
// NOTE: if you pass true for $skip_fix_course_sortorder
// you will want to call fix_course_sortorder() after your are done
// with course creation
function create_course ($course,$skip_fix_course_sortorder=0){
global $CFG;
// define a template
if(!empty($CFG->enrol_db_template)){
$template = get_record("course", 'shortname', $CFG->enrol_db_template);
$template = (array)$template;
} else {
$site = get_site();
$template = array(
'startdate' => time() + 3600 * 24,
'summary' => get_string("defaultcoursesummary"),
'format' => "weeks",
'password' => "",
'guest' => 0,
'numsections' => 10,
'idnumber' => '',
'cost' => '',
'newsitems' => 5,
'showgrades' => 1,
'groupmode' => 0,
'groupmodeforce' => 0,
'student' => $site->student,
'students' => $site->students,
'teacher' => $site->teacher,
'teachers' => $site->teachers,
);
}
// overlay template
foreach (array_keys($template) AS $key) {
if (empty($course->$key)) {
$course->$key = $template[$key];
}
}
$course->category = 1; // the misc 'catch-all' category
if (!empty($CFG->enrol_db_category)){ //category = 0 or undef will break moodle
$course->category = $CFG->enrol_db_category;
}
// define the sortorder
$sort = get_field_sql('SELECT COALESCE(MAX(sortorder)+1, 100) AS max ' .
' FROM ' . $CFG->prefix . 'course ' .
' WHERE category=' . $course->category);
$course->sortorder = $sort;
// override with local data
$course->startdate = time() + 3600 * 24;
$course->timecreated = time();
$course->visible = 1;
// clear out id just in case
unset($course->id);
// truncate a few key fields
$course->idnumber = substr($course->idnumber, 0, 100);
$course->shortname = substr($course->shortname, 0, 15);
// store it and log
if ($newcourseid = insert_record("course", $course)) { // Set up new course
$section = NULL;
$section->course = $newcourseid; // Create a default section.
$section->section = 0;
$section->id = insert_record("course_sections", $section);
$page = page_create_object(PAGE_COURSE_VIEW, $newcourseid);
blocks_repopulate_page($page); // Return value no
if(!$skip_fix_course_sortorder){
fix_course_sortorder();
}
add_to_log($newcourseid, "course", "new", "view.php?id=$newcourseid", "enrol/database auto-creation");
} else {
trigger_error("Could not create new course $extcourse from from database");
notify("Serious Error! Could not create the new course!");
return false;
}
return $newcourseid;
}
/// DB Connect
/// NOTE: You MUST remember to disconnect
/// when you stop using it -- as this call will
/// sometimes modify $CFG->prefix for the whole of Moodle!
function enrol_connect() {
global $CFG;
// Try to connect to the external database (forcing new connection)
$enroldb = &ADONewConnection($CFG->enrol_dbtype);
if ($enroldb->Connect($CFG->enrol_dbhost, $CFG->enrol_dbuser, $CFG->enrol_dbpass, $CFG->enrol_dbname, true)) {
$enroldb->SetFetchMode(ADODB_FETCH_ASSOC); ///Set Assoc mode always after DB connection
return $enroldb;
} else {
trigger_error("Error connecting to enrolment DB backend with: "
. "$CFG->enrol_dbhost,$CFG->enrol_dbuser,$CFG->enrol_dbpass,$CFG->enrol_dbname");
return false;
}
}
/// DB Disconnect
function enrol_disconnect($enroldb) {
global $CFG;
$enroldb->Close();
}
/**
* This function returns the name and value of the role field to query the db
* for, or null if there isn't one.
*
* @param object The ADOdb connection
* @param object The role
* @return array (boolean, string, db quoted string)
*/
function role_fields($enroldb, $role) {
global $CFG;
if ($have_role = !empty($role)
&& !empty($CFG->enrol_db_remoterolefield)
&& !empty($CFG->enrol_db_localrolefield)
&& !empty($role->{$CFG->enrol_db_localrolefield})) {
$remote_role_name = $CFG->enrol_db_remoterolefield;
$remote_role_value = $enroldb->quote($role->{$CFG->enrol_db_localrolefield});
} else {
$remote_role_name = $remote_role_value = null;
}
return array($have_role, $remote_role_name, $remote_role_value);
}
} // end of class
?>