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class.ilObjCourseGrouping.php
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1 <?php
2 /*
3  +-----------------------------------------------------------------------------+
4  | ILIAS open source |
5  +-----------------------------------------------------------------------------+
6  | Copyright (c) 1998-2005 ILIAS open source, University of Cologne |
7  | |
8  | This program is free software; you can redistribute it and/or |
9  | modify it under the terms of the GNU General Public License |
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13  | This program is distributed in the hope that it will be useful, |
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16  | GNU General Public License for more details. |
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20  | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
21  +-----------------------------------------------------------------------------+
22 */
23 
32 require_once "./classes/class.ilObject.php";
33 
34 class ilObjCourseGrouping
35 {
36  var $db;
37 
38  protected static $assignedObjects = array();
39 
46  function ilObjCourseGrouping($a_id = 0)
47  {
48  global $ilDB;
49 
50  $this->setType('crsg');
51  $this->db =& $ilDB;
52 
53  $this->setId($a_id);
54 
55  if($a_id)
56  {
57  $this->read();
58  }
59  }
60  function setId($a_id)
61  {
62  $this->id = $a_id;
63  }
64  function getId()
65  {
66  return $this->id;
67  }
68 
69  function setContainerRefId($a_ref_id)
70  {
71  $this->ref_id = $a_ref_id;
72  }
73  function getContainerRefId()
74  {
75  return $this->ref_id;
76  }
77  function setContainerObjId($a_obj_id)
78  {
79  $this->obj_id = $a_obj_id;
80  }
81  function getContainerObjId()
82  {
83  return $this->obj_id;
84  }
85  function getContainerType()
86  {
87  return $this->container_type;
88  }
89  function setContainerType($a_type)
90  {
91  $this->container_type = $a_type;
92  }
93 
94  function setType($a_type)
95  {
96  $this->type = $a_type;
97  }
98  function getType()
99  {
100  return $this->type;
101  }
102 
103  function setTitle($a_title)
104  {
105  $this->title = $a_title;
106  }
107  function getTitle()
108  {
109  return $this->title;
110  }
111  function setDescription($a_desc)
112  {
113  $this->description = $a_desc;
114  }
115  function getDescription()
116  {
117  return $this->description;
118  }
119  function setUniqueField($a_uni)
120  {
121  $this->unique_field = $a_uni;
122  }
123  function getUniqueField()
124  {
125  return $this->unique_field;
126  }
127 
128  function getCountAssignedItems()
129  {
130  return count($this->getAssignedItems());
131  }
132 
133  function getAssignedItems()
134  {
135  global $tree;
136 
137  include_once './classes/class.ilConditionHandler.php';
138  $condition_data = ilConditionHandler::_getConditionsOfTrigger($this->getType(),$this->getId());
139  $conditions = array();
140  foreach($condition_data as $condition)
141  {
142  if($tree->isDeleted($condition['target_ref_id']))
143  {
144  continue;
145  }
146  $conditions[] = $condition;
147  }
148  return count($conditions) ? $conditions : array();
149  }
150 
151  function delete()
152  {
153  global $ilDB;
154 
155  include_once './classes/class.ilConditionHandler.php';
156 
157  if($this->getId() and $this->getType() === 'crsg')
158  {
159  $query = "DELETE FROM object_data WHERE obj_id = ".$ilDB->quote($this->getId(),'integer')." ";
160  $res = $ilDB->manipulate($query);
161 
162  $query = "DELETE FROM crs_groupings ".
163  "WHERE crs_grp_id = ".$ilDB->quote($this->getId(),'integer')." ";
164  $res = $ilDB->manipulate($query);
165 
166  // Delete conditions
167  $condh =& new ilConditionHandler();
168  $condh->deleteByObjId($this->getId());
169 
170  return true;
171  }
172  return false;
173  }
174 
175  function create($a_course_ref_id,$a_course_id)
176  {
177  global $ilUser,$ilDB;
178 
179  // INSERT IN object_data
180  $this->setId($ilDB->nextId("object_data"));
181  $query = "INSERT INTO object_data ".
182  "(obj_id, type,title,description,owner,create_date,last_update) ".
183  "VALUES ".
184  "(".
185  $ilDB->quote($this->getId(), "integer").",".
186  $ilDB->quote($this->type, "text").",".
187  $ilDB->quote($this->getTitle(), "text").",".
188  $ilDB->quote($this->getDescription(), "text").",".
189  $ilDB->quote($ilUser->getId(), "integer").",".
190  $ilDB->now().",".
191  $ilDB->now().
192  ')';
193 
194  $ilDB->manipulate($query);
195 
196  // INSERT in crs_groupings
197  $query = "INSERT INTO crs_groupings (crs_grp_id,crs_ref_id,crs_id,unique_field) ".
198  "VALUES (".
199  $ilDB->quote($this->getId(),'integer').", ".
200  $ilDB->quote($a_course_ref_id,'integer').", ".
201  $ilDB->quote($a_course_id,'integer').", ".
202  $ilDB->quote($this->getUniqueField(),'text')." ".
203  ")";
204  $res = $ilDB->manipulate($query);
205 
206  return $this->getId();
207  }
208 
209  function update()
210  {
211  global $ilDB;
212 
213  if($this->getId() and $this->getType() === 'crsg')
214  {
215  // UPDATe object_data
216  $query = "UPDATE object_data ".
217  "SET title = ".$ilDB->quote($this->getTitle(),'text').", ".
218  "description = ".$ilDB->quote($this->getDescription(),'text')." ".
219  "WHERE obj_id = ".$ilDB->quote($this->getId(),'integer')." ".
220  "AND type = ".$ilDB->quote($this->getType(),'text')." ";
221  $res = $ilDB->manipulate($query);
222 
223  // UPDATE crs_groupings
224  $query = "UPDATE crs_groupings ".
225  "SET unique_field = ".$ilDB->quote($this->getUniqueField(),'text')." ".
226  "WHERE crs_grp_id = ".$ilDB->quote($this->getId(),'integer')." ";
227  $res = $ilDB->manipulate($query);
228 
229  // UPDATE conditions
230  $query = "UPDATE conditions ".
231  "SET value = ".$ilDB->quote($this->getUniqueField(),'text')." ".
232  "WHERE trigger_obj_id = ".$ilDB->quote($this->getId(),'integer')." ".
233  "AND trigger_type = 'crsg'";
234  $res = $ilDB->manipulate($query);
235 
236  return true;
237  }
238  return false;
239  }
240 
241  function isAssigned($a_course_id)
242  {
243  foreach($this->getAssignedItems() as $condition_data)
244  {
245  if($a_course_id == $condition_data['target_obj_id'])
246  {
247  return true;
248  }
249  }
250  return false;
251  }
252 
253  function read()
254  {
255  global $ilObjDataCache,$ilDB;
256 
257  $query = "SELECT * FROM object_data ".
258  "WHERE obj_id = ".$ilDB->quote($this->getId() ,'integer')." ";
259 
260  $res = $this->db->query($query);
261  while($row = $res->fetchRow(DB_FETCHMODE_OBJECT))
262  {
263  $this->setTitle($row->title);
264  $this->setDescription($row->description);
265  }
266 
267  $query = "SELECT * FROM crs_groupings ".
268  "WHERE crs_grp_id = ".$ilDB->quote($this->getId(),'integer')." ";
269  $res = $ilDB->query($query);
270 
271  while($row = $res->fetchRow(DB_FETCHMODE_OBJECT))
272  {
273  $this->setUniqueField($row->unique_field);
274  $this->setContainerRefId($row->crs_ref_id);
275  $this->setContainerObjId($row->crs_id);
276  $this->setContainerType($ilObjDataCache->lookupType($this->getContainerObjId()));
277  }
278 
279  return true;
280  }
281 
282  function _checkAccess($grouping_id)
283  {
284  global $ilAccess,$tree;
285 
286  $tmp_grouping_obj = new ilObjCourseGrouping($grouping_id);
287 
288  $found_invisible = false;
289  foreach($tmp_grouping_obj->getAssignedItems() as $condition)
290  {
291  if(!$ilAccess->checkAccess('write','',$condition['target_ref_id']))
292  {
293  $found_invisible = true;
294  break;
295  }
296  }
297  return $found_invisible ? false : true;
298  }
299 
305  function _getVisibleGroupings($a_obj_id)
306  {
307  global $ilObjDataCache,$ilAccess,$ilDB;
308 
309  $container_type = $ilObjDataCache->lookupType($a_obj_id) == 'grp' ? 'grp' : 'crs';
310 
311 
312  // First get all groupings
313  $query = "SELECT * FROM object_data WHERE type = 'crsg' ORDER BY title";
314  $res = $ilDB->query($query);
315  $groupings = array();
316  while($row = $res->fetchRow(DB_FETCHMODE_OBJECT))
317  {
318  $groupings[] = $row->obj_id;
319  }
320 
321  //check access
322  foreach($groupings as $grouping_id)
323  {
324  $tmp_grouping_obj = new ilObjCourseGrouping($grouping_id);
325 
326  // Check container type
327  if($tmp_grouping_obj->getContainerType() != $container_type)
328  {
329  continue;
330  }
331  // Check if container is current container
332  if($tmp_grouping_obj->getContainerObjId() == $a_obj_id)
333  {
334  $visible_groupings[] = $grouping_id;
335  continue;
336  }
337  // check if items are assigned
338  if(count($items = $tmp_grouping_obj->getAssignedItems()))
339  {
340  foreach($items as $condition_data)
341  {
342  if($ilAccess->checkAccess('write','',$condition_data['target_ref_id']))
343  {
344  $visible_groupings[] = $grouping_id;
345  break;
346  }
347  }
348 
349  }
350  }
351  return $visible_groupings ? $visible_groupings : array();
352  }
353 
354  function assign($a_crs_ref_id,$a_course_id)
355  {
356  // Add the parent course of grouping
357  $this->__addCondition($this->getContainerRefId(),$this->getContainerObjId());
358  $this->__addCondition($a_crs_ref_id,$a_course_id);
359 
360  return true;
361  }
362 
363  function deassign($a_crs_ref_id,$a_course_id)
364  {
365  include_once './classes/class.ilConditionHandler.php';
366 
367 
368  $condh =& new ilConditionHandler();
369 
370  // DELETE also original course if its the last
371  if($this->getCountAssignedCourses() == 2)
372  {
373  $condh->deleteByObjId($this->getId());
374 
375  return true;
376  }
377 
378  foreach(ilConditionHandler::_getConditionsOfTrigger('crsg',$this->getId()) as $cond_data)
379  {
380 
381  if($cond_data['target_ref_id'] == $a_crs_ref_id and
382  $cond_data['target_obj_id'] == $a_course_id)
383  {
384  $condh->deleteCondition($cond_data['id']);
385  }
386  }
387 
388  return true;
389 
390  }
391  // PRIVATE
392  function __addCondition($a_target_ref_id,$a_target_obj_id)
393  {
394  include_once './classes/class.ilConditionHandler.php';
395 
396  $tmp_condh =& new ilConditionHandler();
397  $tmp_condh->enableAutomaticValidation(false);
398 
399  $tmp_condh->setTargetRefId($a_target_ref_id);
400  $tmp_condh->setTargetObjId($a_target_obj_id);
401  $tmp_condh->setTargetType('crs');
402  $tmp_condh->setTriggerRefId(0);
403  $tmp_condh->setTriggerObjId($this->getId());
404  $tmp_condh->setTriggerType('crsg');
405  $tmp_condh->setOperator('not_member');
406  $tmp_condh->setValue($this->getUniqueField());
407 
408  if(!$tmp_condh->checkExists())
409  {
410  $tmp_condh->storeCondition();
411 
412  return true;
413  }
414  return false;
415  }
416 
417  // STATIC
418  function _deleteAll($a_course_id)
419  {
420  global $ilDB;
421 
422  // DELETE CONDITIONS
423  foreach($groupings = ilObjCourseGrouping::_getGroupings($a_course_id) as $grouping_id)
424  {
425  include_once './classes/class.ilConditionHandler.php';
426 
427  $condh =& new ilConditionHandler();
428  $condh->deleteByObjId($grouping_id);
429  }
430 
431  $query = "DELETE FROM crs_groupings ".
432  "WHERE crs_id = ".$ilDB->quote($a_course_id,'integer')." ";
433  $res = $ilDB->manipulate($query);
434 
435  return true;
436  }
437 
438  function _getGroupings($a_course_id)
439  {
440  global $ilDB;
441 
442  $query = "SELECT * FROM crs_groupings ".
443  "WHERE crs_id = ".$ilDB->quote($a_course_id,'integer')." ";
444 
445  $res = $ilDB->query($query);
446  while($row = $res->fetchRow(DB_FETCHMODE_OBJECT))
447  {
448  $groupings[] = $row->crs_grp_id;
449  }
450  return $groupings ? $groupings : array();
451  }
452 
453  function _checkCondition($trigger_obj_id,$operator,$value,$a_usr_id = 0)
454  {
455  // in the moment i alway return true, there are some problems with presenting the condition if it fails,
456  // only course register class check manually if this condition is fullfilled
457  return true;
458  }
459 
460 
467  function _getGroupingCourseIds($a_course_ref_id,$a_course_id)
468  {
469  global $tree;
470 
471  include_once './classes/class.ilConditionHandler.php';
472 
473  // get all grouping ids the course is assigned to
474  foreach(ilConditionHandler::_getConditionsOfTarget($a_course_ref_id,$a_course_id,'crs') as $condition)
475  {
476  if($condition['trigger_type'] == 'crsg')
477  {
478  foreach(ilConditionHandler::_getConditionsOfTrigger('crsg',$condition['trigger_obj_id']) as $target_condition)
479  {
480  if($tree->isDeleted($target_condition['target_ref_id']))
481  {
482  continue;
483  }
484  $course_ids[] = array('id' => $target_condition['target_obj_id'],
485  'unique' => $target_condition['value']);
486  }
487  }
488  }
489  return $course_ids ? $course_ids : array();
490  }
491 
492 
497  public static function getAssignedObjects()
498  {
499  return self::$assignedObjects ? self::$assignedObjects : array();
500  }
501 
502  function _checkGroupingDependencies(&$container_obj, $a_user_id = null)
503  {
504  global $ilUser,$lng,$tree;
505 
506  include_once './classes/class.ilConditionHandler.php';
507 
508  $user_id = is_null($a_user_id) ? $ilUser->getId() : $a_user_id;
509 
510 
511  $trigger_ids = array();
512  foreach(ilConditionHandler::_getConditionsOfTarget($container_obj->getRefId(),
513  $container_obj->getId(),
514  $container_obj->getType()) as $condition)
515  {
516  if($condition['operator'] == 'not_member')
517  {
518  $trigger_ids[] = $condition['trigger_obj_id'];
519  break;
520  }
521  }
522  if(!count($trigger_ids))
523  {
524  return true;
525  }
526  $matriculation_message = $assigned_message = '';
527  self::$assignedObjects = array();
528  foreach($trigger_ids as $trigger_id)
529  {
530  foreach(ilConditionHandler::_getConditionsOfTrigger('crsg',$trigger_id) as $condition)
531  {
532  // Handle deleted items
533  if($tree->isDeleted($condition['target_ref_id']))
534  {
535  continue;
536  }
537  if($condition['operator'] == 'not_member')
538  {
539  switch($condition['value'])
540  {
541  case 'matriculation':
542  if(!strlen(ilObjUser::lookupMatriculation($user_id)))
543  {
544  if(!$matriculation_message)
545  {
546  $matriculation_message = $lng->txt('crs_grp_matriculation_required');
547  }
548  }
549  }
550  if($container_obj->getType() == 'crs')
551  {
552  include_once('Modules/Course/classes/class.ilCourseParticipants.php');
553  $members = ilCourseParticipants::_getInstanceByObjId($condition['target_obj_id']);
554  if($members->isGroupingMember($user_id,$condition['value']))
555  {
556  if(!$assigned_message)
557  {
558  self::$assignedObjects[] = $condition['target_obj_id'];
559  $assigned_message = $lng->txt('crs_grp_already_assigned');
560  }
561  }
562  }
563  elseif($container_obj->getType() == 'grp')
564  {
565  include_once('Modules/Group/classes/class.ilGroupParticipants.php');
566  $members = ilGroupParticipants::_getInstanceByObjId($condition['target_obj_id']);
567  if($members->isGroupingMember($user_id,$condition['value']))
568  {
569  if(!$assigned_message)
570  {
571  self::$assignedObjects[] = $condition['target_obj_id'];
572  $assigned_message = $lng->txt('crs_grp_already_assigned');
573  }
574  }
575 
576  }
577  else
578  {
579  if(ilObjGroup::_isMember($user_id,$condition['target_ref_id'],$condition['value']))
580  {
581  if(!$assigned_message)
582  {
583  self::$assignedObjects[] = $condition['target_obj_id'];
584  $assigned_message = $lng->txt('crs_grp_already_assigned');
585  }
586  }
587 
588  }
589  }
590  }
591  }
592  if($matriculation_message)
593  {
594  $container_obj->appendMessage($matriculation_message);
595  return false;
596  }
597  elseif($assigned_message)
598  {
599  $container_obj->appendMessage($assigned_message);
600  return false;
601  }
602  return true;
603  }
604 
605 
612  function _getGroupingItems($container_obj)
613  {
614  global $tree,$ilObjDataCache,$ilAccess,$tree;
615 
616  include_once './classes/class.ilConditionHandler.php';
617 
618  $trigger_ids = array();
619  foreach(ilConditionHandler::_getConditionsOfTarget($container_obj->getRefId(),
620  $container_obj->getId(),
621  $container_obj->getType()) as $condition)
622  {
623  if($condition['operator'] == 'not_member')
624  {
625  $trigger_ids[] = $condition['trigger_obj_id'];
626  }
627  }
628  if(!count($trigger_ids))
629  {
630  return false;
631  }
632  $hash_table = array();
633  foreach($trigger_ids as $trigger_id)
634  {
635  foreach(ilConditionHandler::_getConditionsOfTrigger('crsg',$trigger_id) as $condition)
636  {
637  // Continue if trigger is deleted
638  if($tree->isDeleted($condition['target_ref_id']))
639  {
640  continue;
641  }
642 
643  if($condition['operator'] == 'not_member')
644  {
645  if(!$hash_table[$condition['target_ref_id']])
646  {
647  $items[] = $condition['target_ref_id'];
648  }
649  $hash_table[$condition['target_ref_id']] = true;
650  }
651  }
652  }
653  return $items ? $items : array();
654  }
655 
656 } // END class.ilObjCourseGrouping
657 ?>