ILIAS  Release_5_0_x_branch Revision 61816
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class.ilObjContentObjectAccess.php
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1 <?php
2 
3 /* Copyright (c) 1998-2011 ILIAS open source, Extended GPL, see docs/LICENSE */
4 
5 
6 include_once("./Services/Object/classes/class.ilObjectAccess.php");
7 
17 class ilObjContentObjectAccess extends ilObjectAccess
18 {
19  static $online;
20  static $lo_access;
21 
34  function _checkAccess($a_cmd, $a_permission, $a_ref_id, $a_obj_id, $a_user_id = "")
35  {
36  global $ilUser, $lng, $rbacsystem, $ilAccess;
37 
38  if ($a_user_id == "")
39  {
40  $a_user_id = $ilUser->getId();
41  }
42 
43  switch ($a_cmd)
44  {
45  case "view":
46 
47  if(!ilObjContentObjectAccess::_lookupOnline($a_obj_id)
48  && !$rbacsystem->checkAccessOfUser($a_user_id,'write',$a_ref_id))
49  {
50  $ilAccess->addInfoItem(IL_NO_OBJECT_ACCESS, $lng->txt("offline"));
51  return false;
52  }
53  break;
54 
55  case "continue":
56 
57  // no continue command for anonymous user
58  if ($ilUser->getId() == ANONYMOUS_USER_ID)
59  {
60  $ilAccess->addInfoItem(IL_NO_OBJECT_ACCESS, $lng->txt("lm_no_continue_for_anonym"));
61  return false;
62  }
63 
64  if(!ilObjContentObjectAccess::_lookupOnline($a_obj_id)
65  && !$rbacsystem->checkAccessOfUser($a_user_id,'write',$a_ref_id))
66  {
67  $ilAccess->addInfoItem(IL_NO_OBJECT_ACCESS, $lng->txt("offline"));
68  return false;
69  }
70 
71  if (ilObjContentObjectAccess::_getLastAccessedPage($a_ref_id,$a_user_id) <= 0)
72  {
73  $ilAccess->addInfoItem(IL_NO_OBJECT_ACCESS, $lng->txt("not_accessed_yet"));
74  return false;
75  }
76  break;
77 
78  // for permission query feature
79  case "info":
80  if(!ilObjContentObjectAccess::_lookupOnline($a_obj_id))
81  {
82  $ilAccess->addInfoItem(IL_NO_OBJECT_ACCESS, $lng->txt("offline"));
83  }
84  else
85  {
86  $ilAccess->addInfoItem(IL_STATUS_MESSAGE, $lng->txt("online"));
87  }
88  break;
89 
90  }
91 
92  switch ($a_permission)
93  {
94  case "read":
95  case "visible":
96  if (!ilObjContentObjectAccess::_lookupOnline($a_obj_id) &&
97  (!$rbacsystem->checkAccessOfUser($a_user_id,'write', $a_ref_id)))
98  {
99  $ilAccess->addInfoItem(IL_NO_OBJECT_ACCESS, $lng->txt("offline"));
100  return false;
101  }
102  break;
103  }
104 
105 
106  return true;
107  }
108 
109  //
110  // access relevant methods
111  //
112 
118  function _lookupOnline($a_id)
119  {
120  global $ilDB;
121 
122  if (isset(self::$online[$a_id]))
123  {
124  return self::$online[$a_id];
125  }
126 
127  $q = "SELECT is_online FROM content_object WHERE id = ".$ilDB->quote($a_id, "integer");
128  $lm_set = $ilDB->query($q);
129  $lm_rec = $ilDB->fetchAssoc($lm_set);
130 
131  self::$online[$a_id] = ilUtil::yn2tf($lm_rec["is_online"]);
132  return ilUtil::yn2tf($lm_rec["is_online"]);
133  }
134 
141  function _getLastAccessedPage($a_ref_id, $a_user_id = "")
142  {
143  global $ilDB, $ilUser;
144 
145  if ($a_user_id == "")
146  {
147  $a_user_id = $ilUser->getId();
148  }
149 
150  if (isset(self::$lo_access[$a_ref_id]))
151  {
152  $acc_rec["obj_id"] = self::$lo_access[$a_ref_id];
153  }
154  else
155  {
156  $q = "SELECT * FROM lo_access WHERE ".
157  "usr_id = ".$ilDB->quote($a_user_id, "integer")." AND ".
158  "lm_id = ".$ilDB->quote($a_ref_id, "integer");
159 
160  $acc_set = $ilDB->query($q);
161  $acc_rec = $ilDB->fetchAssoc($acc_set);
162  }
163 
164  if ($acc_rec["obj_id"] > 0)
165  {
166  $lm_id = ilObject::_lookupObjId($a_ref_id);
167  $mtree = new ilTree($lm_id);
168  $mtree->setTableNames('lm_tree','lm_data');
169  $mtree->setTreeTablePK("lm_id");
170  if ($mtree->isInTree($acc_rec["obj_id"]))
171  {
172  return $acc_rec["obj_id"];
173  }
174  }
175 
176  return 0;
177  }
178 
182  function _checkGoto($a_target)
183  {
184  global $ilAccess;
185 
186  $t_arr = explode("_", $a_target);
187 
188  if (($t_arr[0] != "lm" && $t_arr[0] != "dbk" && $t_arr[0] != "st"
189  && $t_arr[0] != "pg")
190  || ((int) $t_arr[1]) <= 0)
191  {
192  return false;
193  }
194 
195  if ($t_arr[0] == "lm" || $t_arr[0] == "dbk")
196  {
197  if ($ilAccess->checkAccess("read", "", $t_arr[1]) ||
198  $ilAccess->checkAccess("visible", "", $t_arr[1]))
199  {
200  return true;
201  }
202  }
203  else
204  {
205  if ($t_arr[2] > 0)
206  {
207  $ref_ids = array($t_arr[2]);
208  }
209  else
210  {
211  // determine learning object
212  include_once("./Modules/LearningModule/classes/class.ilLMObject.php");
213  $lm_id = ilLMObject::_lookupContObjID($t_arr[1]);
214  $ref_ids = ilObject::_getAllReferences($lm_id);
215  }
216  // check read permissions
217  foreach ($ref_ids as $ref_id)
218  {
219  // Permission check
220  if ($ilAccess->checkAccess("read", "", $ref_id))
221  {
222  return true;
223  }
224  }
225 
226  }
227  return false;
228  }
229 
238  static function _isOffline($a_obj_id)
239  {
240  return !self::_lookupOnline($a_obj_id);
241  }
242 
248  function _preloadData($a_obj_ids, $a_ref_ids)
249  {
250  global $ilDB, $ilUser;
251 
252  $q = "SELECT id, is_online FROM content_object WHERE ".
253  $ilDB->in("id", $a_obj_ids, false, "integer");
254 
255  $lm_set = $ilDB->query($q);
256  while ($rec = $ilDB->fetchAssoc($lm_set))
257  {
258  self::$online[$rec["id"]] = ilUtil::yn2tf($rec["is_online"]);
259  }
260 
261  $q = "SELECT obj_id, lm_id FROM lo_access WHERE ".
262  "usr_id = ".$ilDB->quote($ilUser->getId(), "integer")." AND ".
263  $ilDB->in("lm_id", $a_ref_ids, false, "integer");;
264  $set = $ilDB->query($q);
265  foreach ($a_ref_ids as $r)
266  {
267  self::$lo_access[$r] = 0;
268  }
269  while ($rec = $ilDB->fetchAssoc($set))
270  {
271  self::$lo_access[$rec["lm_id"]] = $rec["obj_id"];
272  }
273 
274  }
275 
276 }
277 
278 ?>