forked from moodle/moodle
-
Notifications
You must be signed in to change notification settings - Fork 0
/
Copy pathlib.php
1837 lines (1636 loc) · 63.3 KB
/
lib.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
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
<?php
// This file is part of Moodle - http://moodle.org/
//
// Moodle is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// Moodle is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with Moodle. If not, see <http://www.gnu.org/licenses/>.
/**
* This file contains classes used to manage the repository plugins in Moodle
* and was introduced as part of the changes occuring in Moodle 2.0
*
* @since 2.0
* @package core
* @subpackage repository
* @copyright 2009 Dongsheng Cai <[email protected]>
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
require_once(dirname(dirname(__FILE__)) . '/config.php');
require_once($CFG->libdir . '/filelib.php');
require_once($CFG->libdir . '/formslib.php');
define('FILE_EXTERNAL', 1);
define('FILE_INTERNAL', 2);
/**
* This class is used to manage repository plugins
*
* A repository_type is a repository plug-in. It can be Box.net, Flick-r, ...
* A repository type can be edited, sorted and hidden. It is mandatory for an
* administrator to create a repository type in order to be able to create
* some instances of this type.
* Coding note:
* - a repository_type object is mapped to the "repository" database table
* - "typename" attibut maps the "type" database field. It is unique.
* - general "options" for a repository type are saved in the config_plugin table
* - when you delete a repository, all instances are deleted, and general
* options are also deleted from database
* - When you create a type for a plugin that can't have multiple instances, a
* instance is automatically created.
*
* @package moodlecore
* @subpackage repository
* @copyright 2009 Jerome Mouneyrac
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
class repository_type {
/**
* Type name (no whitespace) - A type name is unique
* Note: for a user-friendly type name see get_readablename()
* @var String
*/
private $_typename;
/**
* Options of this type
* They are general options that any instance of this type would share
* e.g. API key
* These options are saved in config_plugin table
* @var array
*/
private $_options;
/**
* Is the repository type visible or hidden
* If false (hidden): no instances can be created, edited, deleted, showned , used...
* @var boolean
*/
private $_visible;
/**
* 0 => not ordered, 1 => first position, 2 => second position...
* A not order type would appear in first position (should never happened)
* @var integer
*/
private $_sortorder;
/**
* Return if the instance is visible in a context
* TODO: check if the context visibility has been overwritten by the plugin creator
* (need to create special functions to be overvwritten in repository class)
* @param objet $context - context
* @return boolean
*/
public function get_contextvisibility($context) {
global $USER;
if ($context->contextlevel == CONTEXT_COURSE) {
return $this->_options['enablecourseinstances'];
}
if ($context->contextlevel == CONTEXT_USER) {
return $this->_options['enableuserinstances'];
}
//the context is SITE
return true;
}
/**
* repository_type constructor
* @global object $CFG
* @param integer $typename
* @param array $typeoptions
* @param boolean $visible
* @param integer $sortorder (don't really need set, it will be during create() call)
*/
public function __construct($typename = '', $typeoptions = array(), $visible = true, $sortorder = 0) {
global $CFG;
//set type attributs
$this->_typename = $typename;
$this->_visible = $visible;
$this->_sortorder = $sortorder;
//set options attribut
$this->_options = array();
$options = repository::static_function($typename, 'get_type_option_names');
//check that the type can be setup
if (!empty($options)) {
//set the type options
foreach ($options as $config) {
if (array_key_exists($config, $typeoptions)) {
$this->_options[$config] = $typeoptions[$config];
}
}
}
//retrieve visibility from option
if (array_key_exists('enablecourseinstances',$typeoptions)) {
$this->_options['enablecourseinstances'] = $typeoptions['enablecourseinstances'];
} else {
$this->_options['enablecourseinstances'] = 0;
}
if (array_key_exists('enableuserinstances',$typeoptions)) {
$this->_options['enableuserinstances'] = $typeoptions['enableuserinstances'];
} else {
$this->_options['enableuserinstances'] = 0;
}
}
/**
* Get the type name (no whitespace)
* For a human readable name, use get_readablename()
* @return String the type name
*/
public function get_typename() {
return $this->_typename;
}
/**
* Return a human readable and user-friendly type name
* @return string user-friendly type name
*/
public function get_readablename() {
return get_string('pluginname','repository_'.$this->_typename);
}
/**
* Return general options
* @return array the general options
*/
public function get_options() {
return $this->_options;
}
/**
* Return visibility
* @return boolean
*/
public function get_visible() {
return $this->_visible;
}
/**
* Return order / position of display in the file picker
* @return integer
*/
public function get_sortorder() {
return $this->_sortorder;
}
/**
* Create a repository type (the type name must not already exist)
* @param boolean throw exception?
* @return mixed return int if create successfully, return false if
* any errors
* @global object $DB
*/
public function create($silent = false) {
global $DB;
//check that $type has been set
$timmedtype = trim($this->_typename);
if (empty($timmedtype)) {
throw new repository_exception('emptytype', 'repository');
}
//set sortorder as the last position in the list
if (!isset($this->_sortorder) || $this->_sortorder == 0 ) {
$sql = "SELECT MAX(sortorder) FROM {repository}";
$this->_sortorder = 1 + $DB->get_field_sql($sql);
}
//only create a new type if it doesn't already exist
$existingtype = $DB->get_record('repository', array('type'=>$this->_typename));
if (!$existingtype) {
//create the type
$newtype = new stdClass();
$newtype->type = $this->_typename;
$newtype->visible = $this->_visible;
$newtype->sortorder = $this->_sortorder;
$plugin_id = $DB->insert_record('repository', $newtype);
//save the options in DB
$this->update_options();
$instanceoptionnames = repository::static_function($this->_typename, 'get_instance_option_names');
//if the plugin type has no multiple instance (e.g. has no instance option name) so it wont
//be possible for the administrator to create a instance
//in this case we need to create an instance
if (empty($instanceoptionnames)) {
$instanceoptions = array();
if (empty($this->_options['pluginname'])) {
// when moodle trying to install some repo plugin automatically
// this option will be empty, get it from language string when display
$instanceoptions['name'] = '';
} else {
// when admin trying to add a plugin manually, he will type a name
// for it
$instanceoptions['name'] = $this->_options['pluginname'];
}
repository::static_function($this->_typename, 'create', $this->_typename, 0, get_system_context(), $instanceoptions);
}
//run plugin_init function
if (!repository::static_function($this->_typename, 'plugin_init')) {
if (!$silent) {
throw new repository_exception('cannotinitplugin', 'repository');
}
}
if(!empty($plugin_id)) {
// return plugin_id if create successfully
return $plugin_id;
} else {
return false;
}
} else {
if (!$silent) {
throw new repository_exception('existingrepository', 'repository');
}
// If plugin existed, return false, tell caller no new plugins were created.
return false;
}
}
/**
* Update plugin options into the config_plugin table
* @param array $options
* @return boolean
*/
public function update_options($options = null) {
global $DB;
$classname = 'repository_' . $this->_typename;
$instanceoptions = repository::static_function($this->_typename, 'get_instance_option_names');
if (empty($instanceoptions)) {
// update repository instance name if this plugin type doesn't have muliti instances
$params = array();
$params['type'] = $this->_typename;
$instances = repository::get_instances($params);
$instance = array_pop($instances);
if ($instance) {
$DB->set_field('repository_instances', 'name', $options['pluginname'], array('id'=>$instance->id));
}
unset($options['pluginname']);
}
if (!empty($options)) {
$this->_options = $options;
}
foreach ($this->_options as $name => $value) {
set_config($name, $value, $this->_typename);
}
return true;
}
/**
* Update visible database field with the value given as parameter
* or with the visible value of this object
* This function is private.
* For public access, have a look to switch_and_update_visibility()
* @global object $DB
* @param boolean $visible
* @return boolean
*/
private function update_visible($visible = null) {
global $DB;
if (!empty($visible)) {
$this->_visible = $visible;
}
else if (!isset($this->_visible)) {
throw new repository_exception('updateemptyvisible', 'repository');
}
return $DB->set_field('repository', 'visible', $this->_visible, array('type'=>$this->_typename));
}
/**
* Update database sortorder field with the value given as parameter
* or with the sortorder value of this object
* This function is private.
* For public access, have a look to move_order()
* @global object $DB
* @param integer $sortorder
* @return boolean
*/
private function update_sortorder($sortorder = null) {
global $DB;
if (!empty($sortorder) && $sortorder!=0) {
$this->_sortorder = $sortorder;
}
//if sortorder is not set, we set it as the ;ast position in the list
else if (!isset($this->_sortorder) || $this->_sortorder == 0 ) {
$sql = "SELECT MAX(sortorder) FROM {repository}";
$this->_sortorder = 1 + $DB->get_field_sql($sql);
}
return $DB->set_field('repository', 'sortorder', $this->_sortorder, array('type'=>$this->_typename));
}
/**
* Change order of the type with its adjacent upper or downer type
* (database fields are updated)
* Algorithm details:
* 1. retrieve all types in an array. This array is sorted by sortorder,
* and the array keys start from 0 to X (incremented by 1)
* 2. switch sortorder values of this type and its adjacent type
* @global object $DB
* @param string $move "up" or "down"
*/
public function move_order($move) {
global $DB;
$types = repository::get_types(); // retrieve all types
/// retrieve this type into the returned array
$i = 0;
while (!isset($indice) && $i<count($types)) {
if ($types[$i]->get_typename() == $this->_typename) {
$indice = $i;
}
$i++;
}
/// retrieve adjacent indice
switch ($move) {
case "up":
$adjacentindice = $indice - 1;
break;
case "down":
$adjacentindice = $indice + 1;
break;
default:
throw new repository_exception('movenotdefined', 'repository');
}
//switch sortorder of this type and the adjacent type
//TODO: we could reset sortorder for all types. This is not as good in performance term, but
//that prevent from wrong behaviour on a screwed database. As performance are not important in this particular case
//it worth to change the algo.
if ($adjacentindice>=0 && !empty($types[$adjacentindice])) {
$DB->set_field('repository', 'sortorder', $this->_sortorder, array('type'=>$types[$adjacentindice]->get_typename()));
$this->update_sortorder($types[$adjacentindice]->get_sortorder());
}
}
/**
* 1. Change visibility to the value chosen
*
* 2. Update the type
* @return boolean
*/
public function update_visibility($visible = null) {
if (is_bool($visible)) {
$this->_visible = $visible;
} else {
$this->_visible = !$this->_visible;
}
return $this->update_visible();
}
/**
* Delete a repository_type (general options are removed from config_plugin
* table, and all instances are deleted)
* @global object $DB
* @return boolean
*/
public function delete() {
global $DB;
//delete all instances of this type
$params = array();
$params['context'] = array();
$params['onlyvisible'] = false;
$params['type'] = $this->_typename;
$instances = repository::get_instances($params);
foreach ($instances as $instance) {
$instance->delete();
}
//delete all general options
foreach ($this->_options as $name => $value) {
set_config($name, null, $this->_typename);
}
return $DB->delete_records('repository', array('type' => $this->_typename));
}
}
/**
* This is the base class of the repository class
*
* To use repository plugin, see:
* http://docs.moodle.org/en/Development:Repository_How_to_Create_Plugin
* class repository is an abstract class, some functions must be implemented in subclass.
* See an example: repository/boxnet/lib.php
*
* A few notes:
* // for ajax file picker, this will print a json string to tell file picker
* // how to build a login form
* $repo->print_login();
* // for ajax file picker, this will return a files list.
* $repo->get_listing();
* // this function will be used for non-javascript version.
* $repo->print_listing();
* // print a search box
* $repo->print_search();
*
* @package moodlecore
* @subpackage repository
* @copyright 2009 Dongsheng Cai <[email protected]>
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
abstract class repository {
// $disabled can be set to true to disable a plugin by force
// example: self::$disabled = true
public $disabled = false;
public $id;
/** @var object current context */
public $context;
public $options;
public $readonly;
public $returntypes;
/** @var object repository instance database record */
public $instance;
/**
* 1. Initialize context and options
* 2. Accept necessary parameters
*
* @param integer $repositoryid repository instance id
* @param integer|object a context id or context object
* @param array $options repository options
*/
public function __construct($repositoryid, $context = SYSCONTEXTID, $options = array(), $readonly = 0) {
global $DB;
$this->id = $repositoryid;
if (is_object($context)) {
$this->context = $context;
} else {
$this->context = get_context_instance_by_id($context);
}
$this->instance = $DB->get_record('repository_instances', array('id'=>$this->id));
$this->readonly = $readonly;
$this->options = array();
if (is_array($options)) {
$options = array_merge($this->get_option(), $options);
} else {
$options = $this->get_option();
}
foreach ($options as $n => $v) {
$this->options[$n] = $v;
}
$this->name = $this->get_name();
$this->returntypes = $this->supported_returntypes();
$this->super_called = true;
}
/**
* Get a repository type object by a given type name.
* @global object $DB
* @param string $typename the repository type name
* @return repository_type|bool
*/
public static function get_type_by_typename($typename) {
global $DB;
if (!$record = $DB->get_record('repository',array('type' => $typename))) {
return false;
}
return new repository_type($typename, (array)get_config($typename), $record->visible, $record->sortorder);
}
/**
* Get the repository type by a given repository type id.
* @global object $DB
* @param int $id the type id
* @return object
*/
public static function get_type_by_id($id) {
global $DB;
if (!$record = $DB->get_record('repository',array('id' => $id))) {
return false;
}
return new repository_type($record->type, (array)get_config($record->type), $record->visible, $record->sortorder);
}
/**
* Return all repository types ordered by sortorder field
* first repository type in returnedarray[0], second repository type in returnedarray[1], ...
* @global object $DB
* @global object $CFG
* @param boolean $visible can return types by visiblity, return all types if null
* @return array Repository types
*/
public static function get_types($visible=null) {
global $DB, $CFG;
$types = array();
$params = null;
if (!empty($visible)) {
$params = array('visible' => $visible);
}
if ($records = $DB->get_records('repository',$params,'sortorder')) {
foreach($records as $type) {
if (file_exists($CFG->dirroot . '/repository/'. $type->type .'/lib.php')) {
$types[] = new repository_type($type->type, (array)get_config($type->type), $type->visible, $type->sortorder);
}
}
}
return $types;
}
/**
* To check if the context id is valid
* @global object $USER
* @param int $contextid
* @return boolean
*/
public static function check_capability($contextid, $instance) {
$context = get_context_instance_by_id($contextid);
$capability = has_capability('repository/'.$instance->type.':view', $context);
if (!$capability) {
throw new repository_exception('nopermissiontoaccess', 'repository');
}
}
/**
* Return all types that you a user can create/edit and which are also visible
* Note: Mostly used in order to know if at least one editable type can be set
* @param object $context the context for which we want the editable types
* @return array types
*/
public static function get_editable_types($context = null) {
if (empty($context)) {
$context = get_system_context();
}
$types= repository::get_types(true);
$editabletypes = array();
foreach ($types as $type) {
$instanceoptionnames = repository::static_function($type->get_typename(), 'get_instance_option_names');
if (!empty($instanceoptionnames)) {
if ($type->get_contextvisibility($context)) {
$editabletypes[]=$type;
}
}
}
return $editabletypes;
}
/**
* Return repository instances
* @global object $DB
* @global object $CFG
* @global object $USER
*
* @param array $args Array containing the following keys:
* currentcontext
* context
* onlyvisible
* type
* accepted_types
* return_types
* userid
*
* @return array repository instances
*/
public static function get_instances($args = array()) {
global $DB, $CFG, $USER;
if (isset($args['currentcontext'])) {
$current_context = $args['currentcontext'];
} else {
$current_context = null;
}
if (!empty($args['context'])) {
$contexts = $args['context'];
} else {
$contexts = array();
}
$onlyvisible = isset($args['onlyvisible']) ? $args['onlyvisible'] : true;
$returntypes = isset($args['return_types']) ? $args['return_types'] : 3;
$type = isset($args['type']) ? $args['type'] : null;
$params = array();
$sql = "SELECT i.*, r.type AS repositorytype, r.sortorder, r.visible
FROM {repository} r, {repository_instances} i
WHERE i.typeid = r.id ";
if (!empty($args['disable_types']) && is_array($args['disable_types'])) {
list($types, $p) = $DB->get_in_or_equal($args['disable_types'], SQL_PARAMS_QM, 'param0000', false);
$sql .= " AND r.type $types";
$params = array_merge($params, $p);
}
if (!empty($args['userid']) && is_numeric($args['userid'])) {
$sql .= " AND (i.userid = 0 or i.userid = ?)";
$params[] = $args['userid'];
}
foreach ($contexts as $context) {
if (empty($firstcontext)) {
$firstcontext = true;
$sql .= " AND ((i.contextid = ?)";
} else {
$sql .= " OR (i.contextid = ?)";
}
$params[] = $context->id;
}
if (!empty($firstcontext)) {
$sql .=')';
}
if ($onlyvisible == true) {
$sql .= " AND (r.visible = 1)";
}
if (isset($type)) {
$sql .= " AND (r.type = ?)";
$params[] = $type;
}
$sql .= " ORDER BY r.sortorder, i.name";
if (!$records = $DB->get_records_sql($sql, $params)) {
$records = array();
}
$repositories = array();
$ft = new filetype_parser();
if (isset($args['accepted_types'])) {
$accepted_types = $args['accepted_types'];
} else {
$accepted_types = '*';
}
foreach ($records as $record) {
if (!file_exists($CFG->dirroot . '/repository/'. $record->repositorytype.'/lib.php')) {
continue;
}
require_once($CFG->dirroot . '/repository/'. $record->repositorytype.'/lib.php');
$options['visible'] = $record->visible;
$options['type'] = $record->repositorytype;
$options['typeid'] = $record->typeid;
// tell instance what file types will be accepted by file picker
$classname = 'repository_' . $record->repositorytype;
$repository = new $classname($record->id, $record->contextid, $options, $record->readonly);
$is_supported = true;
if (empty($repository->super_called)) {
// to make sure the super construct is called
debugging('parent::__construct must be called by '.$record->repositorytype.' plugin.');
} else {
// check mimetypes
if ($accepted_types !== '*' and $repository->supported_filetypes() !== '*') {
$accepted_types = $ft->get_extensions($accepted_types);
$supported_filetypes = $ft->get_extensions($repository->supported_filetypes());
$is_supported = false;
foreach ($supported_filetypes as $type) {
if (in_array($type, $accepted_types)) {
$is_supported = true;
}
}
}
// check return values
if ($returntypes !== 3 and $repository->supported_returntypes() !== 3) {
$type = $repository->supported_returntypes();
if ($type & $returntypes) {
//
} else {
$is_supported = false;
}
}
if (!$onlyvisible || ($repository->is_visible() && !$repository->disabled)) {
// check capability in current context
if (!empty($current_context)) {
$capability = has_capability('repository/'.$record->repositorytype.':view', $current_context);
} else {
$capability = has_capability('repository/'.$record->repositorytype.':view', get_system_context());
}
if ($record->repositorytype == 'coursefiles') {
// coursefiles plugin needs managefiles permission
$capability = $capability && has_capability('moodle/course:managefiles', $current_context);
}
if ($is_supported && $capability) {
$repositories[$repository->id] = $repository;
}
}
}
}
return $repositories;
}
/**
* Get single repository instance
* @global object $DB
* @global object $CFG
* @param integer $id repository id
* @return object repository instance
*/
public static function get_instance($id) {
global $DB, $CFG;
$sql = "SELECT i.*, r.type AS repositorytype, r.visible
FROM {repository} r
JOIN {repository_instances} i ON i.typeid = r.id
WHERE i.id = ?";
if (!$instance = $DB->get_record_sql($sql, array($id))) {
return false;
}
require_once($CFG->dirroot . '/repository/'. $instance->repositorytype.'/lib.php');
$classname = 'repository_' . $instance->repositorytype;
$options['typeid'] = $instance->typeid;
$options['type'] = $instance->repositorytype;
$options['name'] = $instance->name;
$obj = new $classname($instance->id, $instance->contextid, $options, $instance->readonly);
if (empty($obj->super_called)) {
debugging('parent::__construct must be called by '.$classname.' plugin.');
}
return $obj;
}
/**
* Call a static function. Any additional arguments than plugin and function will be passed through.
* @global object $CFG
* @param string $plugin
* @param string $function
* @return mixed
*/
public static function static_function($plugin, $function) {
global $CFG;
//check that the plugin exists
$typedirectory = $CFG->dirroot . '/repository/'. $plugin . '/lib.php';
if (!file_exists($typedirectory)) {
//throw new repository_exception('invalidplugin', 'repository');
return false;
}
$pname = null;
if (is_object($plugin) || is_array($plugin)) {
$plugin = (object)$plugin;
$pname = $plugin->name;
} else {
$pname = $plugin;
}
$args = func_get_args();
if (count($args) <= 2) {
$args = array();
} else {
array_shift($args);
array_shift($args);
}
require_once($typedirectory);
return call_user_func_array(array('repository_' . $plugin, $function), $args);
}
/**
* Move file from download folder to file pool using FILE API
* @global object $DB
* @global object $CFG
* @global object $USER
* @global object $OUTPUT
* @param string $thefile file path in download folder
* @param object $record
* @return array containing the following keys:
* icon
* file
* id
* url
*/
public static function move_to_filepool($thefile, $record) {
global $DB, $CFG, $USER, $OUTPUT;
if ($record->filepath !== '/') {
$record->filepath = trim($record->filepath, '/');
$record->filepath = '/'.$record->filepath.'/';
}
$context = get_context_instance(CONTEXT_USER, $USER->id);
$now = time();
$record->contextid = $context->id;
$record->component = 'user';
$record->filearea = 'draft';
$record->timecreated = $now;
$record->timemodified = $now;
$record->userid = $USER->id;
$record->mimetype = mimeinfo('type', $thefile);
if(!is_numeric($record->itemid)) {
$record->itemid = 0;
}
$fs = get_file_storage();
if ($existingfile = $fs->get_file($context->id, $record->component, $record->filearea, $record->itemid, $record->filepath, $record->filename)) {
throw new moodle_exception('fileexists');
}
if ($file = $fs->create_file_from_pathname($record, $thefile)) {
if (empty($CFG->repository_no_delete)) {
$delete = unlink($thefile);
unset($CFG->repository_no_delete);
}
return array(
'url'=>moodle_url::make_draftfile_url($file->get_itemid(), $file->get_filepath(), $file->get_filename())->out(),
'id'=>$file->get_itemid(),
'file'=>$file->get_filename(),
'icon' => $OUTPUT->pix_url(file_extension_icon($thefile, 32))->out(),
);
} else {
return null;
}
}
/**
* Builds a tree of files This function is
* then called recursively.
*
* @param $fileinfo an object returned by file_browser::get_file_info()
* @param $search searched string
* @param $dynamicmode bool no recursive call is done when in dynamic mode
* @param $list - the array containing the files under the passed $fileinfo
* @returns int the number of files found
*
* todo: take $search into account, and respect a threshold for dynamic loading
*/
public static function build_tree($fileinfo, $search, $dynamicmode, &$list) {
global $CFG, $OUTPUT;
$filecount = 0;
$children = $fileinfo->get_children();
foreach ($children as $child) {
$filename = $child->get_visible_name();
$filesize = $child->get_filesize();
$filesize = $filesize ? display_size($filesize) : '';
$filedate = $child->get_timemodified();
$filedate = $filedate ? userdate($filedate) : '';
$filetype = $child->get_mimetype();
if ($child->is_directory()) {
$path = array();
$level = $child->get_parent();
while ($level) {
$params = $level->get_params();
$path[] = array($params['filepath'], $level->get_visible_name());
$level = $level->get_parent();
}
$tmp = array(
'title' => $child->get_visible_name(),
'size' => 0,
'date' => $filedate,
'path' => array_reverse($path),
'thumbnail' => $OUTPUT->pix_url('f/folder-32')
);
//if ($dynamicmode && $child->is_writable()) {
// $tmp['children'] = array();
//} else {
// if folder name matches search, we send back all files contained.
$_search = $search;
if ($search && stristr($tmp['title'], $search) !== false) {
$_search = false;
}
$tmp['children'] = array();
$_filecount = repository::build_tree($child, $_search, $dynamicmode, $tmp['children']);
if ($search && $_filecount) {
$tmp['expanded'] = 1;
}
//}
if (!$search || $_filecount || (stristr($tmp['title'], $search) !== false)) {
$filecount += $_filecount;
$list[] = $tmp;
}
} else { // not a directory
// skip the file, if we're in search mode and it's not a match
if ($search && (stristr($filename, $search) === false)) {
continue;
}
$params = $child->get_params();
$source = serialize(array($params['contextid'], $params['component'], $params['filearea'], $params['itemid'], $params['filepath'], $params['filename']));
$list[] = array(
'title' => $filename,
'size' => $filesize,
'date' => $filedate,
//'source' => $child->get_url(),
'source' => base64_encode($source),
'thumbnail'=>$OUTPUT->pix_url(file_extension_icon($filename, 32)),
);
$filecount++;
}
}
return $filecount;
}
/**
* Display a repository instance list (with edit/delete/create links)
* @global object $CFG
* @global object $USER
* @global object $OUTPUT
* @param object $context the context for which we display the instance
* @param string $typename if set, we display only one type of instance
*/
public static function display_instances_list($context, $typename = null) {
global $CFG, $USER, $OUTPUT;
$output = $OUTPUT->box_start('generalbox');
//if the context is SYSTEM, so we call it from administration page
$admin = ($context->id == SYSCONTEXTID) ? true : false;
if ($admin) {
$baseurl = new moodle_url('/'.$CFG->admin.'/repositoryinstance.php', array('sesskey'=>sesskey()));
$output .= $OUTPUT->heading(get_string('siteinstances', 'repository'));
} else {
$baseurl = new moodle_url('/repository/manage_instances.php', array('contextid'=>$context->id, 'sesskey'=>sesskey()));
}
$url = $baseurl;
$namestr = get_string('name');
$pluginstr = get_string('plugin', 'repository');
$settingsstr = get_string('settings');
$deletestr = get_string('delete');
//retrieve list of instances. In administration context we want to display all
//instances of a type, even if this type is not visible. In course/user context we
//want to display only visible instances, but for every type types. The repository::get_instances()
//third parameter displays only visible type.
$params = array();
$params['context'] = array($context, get_system_context());