PHP ilObjMediaObject::_removeUsage方法代码示例

 function updateAssignmentTextObject($a_return = false)
 {
     global $ilCtrl, $ilUser;
     $times_up = $this->ass->getDeadline() && $this->ass->getDeadline() - time() < 0;
     if (!$this->ass || $this->ass->getType() != ilExAssignment::TYPE_TEXT || $times_up) {
         if ($times_up) {
             ilUtil::sendFailure($this->lng->txt("exercise_time_over"), true);
         }
         $ilCtrl->redirect($this, "showOverview");
     }
     $this->checkPermission("read");
     $form = $this->initAssignmentTextForm($this->ass);
     // we are not using a purifier, so we have to set the valid RTE tags
     // :TODO:
     include_once "./Services/AdvancedEditing/classes/class.ilObjAdvancedEditing.php";
     $rte = $form->getItemByPostVar("atxt");
     $rte->setRteTags(ilObjAdvancedEditing::_getUsedHTMLTags("exc_ass"));
     if ($form->checkInput()) {
         $text = trim($form->getInput("atxt"));
         $existing = (bool) ilExAssignment::getDeliveredFiles($this->ass->getExerciseId(), $this->ass->getId(), $ilUser->getId());
         $returned_id = $this->object->updateTextSubmission($this->ass->getExerciseId(), $this->ass->getId(), $ilUser->getId(), ilRTE::_replaceMediaObjectImageSrc($text, 0));
         // no empty text
         if ($returned_id) {
             if (!$existing) {
                 // #14332 - new text
                 $this->sendNotifications($this->ass->getId());
                 $this->object->handleSubmission($this->ass->getId());
             }
             // mob usage
             include_once "Services/MediaObjects/classes/class.ilObjMediaObject.php";
             $mobs = ilRTE::_getMediaObjects($text, 0);
             foreach ($mobs as $mob) {
                 if (ilObjMediaObject::_exists($mob)) {
                     ilObjMediaObject::_removeUsage($mob, 'exca~:html', $ilUser->getId());
                     ilObjMediaObject::_saveUsage($mob, 'exca:html', $returned_id);
                 }
             }
         }
         ilUtil::sendSuccess($this->lng->txt("settings_saved"), true);
         if ($a_return) {
             $ilCtrl->redirect($this, "showOverview");
         } else {
             $ilCtrl->redirect($this, "editAssignmentText");
         }
     }
     $form->setValuesByPost();
     $this->editAssignmentTextObject($form);
 }

 /**
 * Deletes the test and all related objects, files and database entries
 *
 * @access	public
 */
 function deleteTest()
 {
     global $tree, $ilDB, $ilPluginAdmin;
     // first of all remove all test editings, because the delete statements used for this
     // contain a subquery for active ids, that are deleted in the next steps
     $this->removeAllTestEditings();
     $result = $ilDB->queryF("SELECT active_id FROM tst_active WHERE test_fi = %s", array('integer'), array($this->getTestId()));
     $active_array = array();
     while ($row = $ilDB->fetchAssoc($result)) {
         array_push($active_array, $row["active_id"]);
     }
     $affectedRows = $ilDB->manipulateF("DELETE FROM tst_active WHERE test_fi = %s", array('integer'), array($this->getTestId()));
     if (count($active_array)) {
         foreach ($active_array as $active_id) {
             $affectedRows = $ilDB->manipulateF("DELETE FROM tst_times WHERE active_fi = %s", array('integer'), array($active_id));
             $affectedRows = $ilDB->manipulateF("DELETE FROM tst_sequence WHERE active_fi = %s", array('integer'), array($active_id));
         }
     }
     $affectedRows = $ilDB->manipulateF("DELETE FROM tst_mark WHERE test_fi = %s", array('integer'), array($this->getTestId()));
     $affectedRows = $ilDB->manipulateF("DELETE FROM tst_tests WHERE test_id = %s", array('integer'), array($this->getTestId()));
     require_once 'Modules/Test/classes/class.ilTestQuestionSetConfigFactory.php';
     $testQuestionSetConfigFactory = new ilTestQuestionSetConfigFactory($tree, $ilDB, $ilPluginAdmin, $this);
     $testQuestionSetConfigFactory->getQuestionSetConfig()->removeQuestionSetRelatedData();
     // delete export files
     include_once "./Services/Utilities/classes/class.ilUtil.php";
     $tst_data_dir = ilUtil::getDataDir() . "/tst_data";
     $directory = $tst_data_dir . "/tst_" . $this->getId();
     if (is_dir($directory)) {
         include_once "./Services/Utilities/classes/class.ilUtil.php";
         ilUtil::delDir($directory);
     }
     include_once "./Services/MediaObjects/classes/class.ilObjMediaObject.php";
     $mobs = ilObjMediaObject::_getMobsOfObject("tst:html", $this->getId());
     // remaining usages are not in text anymore -> delete them
     // and media objects (note: delete method of ilObjMediaObject
     // checks whether object is used in another context; if yes,
     // the object is not deleted!)
     foreach ($mobs as $mob) {
         ilObjMediaObject::_removeUsage($mob, "tst:html", $this->getId());
         if (ilObjMediaObject::_exists($mob)) {
             $mob_obj =& new ilObjMediaObject($mob);
             $mob_obj->delete();
         }
     }
 }

 public function saveStatutoryRegulationsObject()
 {
     require_once 'Services/RTE/classes/class.ilRTE.php';
     if (isset($_POST['statutory_regulations']) && $_POST['statutory_regulations'] != NULL) {
         $this->genSetData->set('statutory_regulations', ilRTE::_replaceMediaObjectImageSrc($_POST['statutory_regulations'], 0), 'regulations');
         // copy temporary media objects (frm~)
         include_once 'Services/MediaObjects/classes/class.ilObjMediaObject.php';
         $mediaObjects = ilRTE::_getMediaObjects($_POST['statutory_regulations'], 0);
         $myMediaObjects = ilObjMediaObject::_getMobsOfObject('pays~:html', ilObject::_lookupObjId($this->ref_id));
         foreach ($mediaObjects as $mob) {
             foreach ($myMediaObjects as $myMob) {
                 if ($mob == $myMob) {
                     // change usage
                     ilObjMediaObject::_removeUsage($mob, 'pays~:html', ilObject::_lookupObjId($this->ref_id));
                     break;
                 }
             }
             ilObjMediaObject::_saveUsage($mob, 'pays~:html', ilObject::_lookupObjId($this->ref_id));
         }
     } else {
         $this->genSetData->set('statutory_regulations', NULL, 'regulations');
     }
     // remove usage of deleted media objects
     include_once 'Services/MediaObjects/classes/class.ilObjMediaObject.php';
     $oldMediaObjects = ilObjMediaObject::_getMobsOfObject('pays~:html', ilObject::_lookupObjId($this->ref_id));
     $curMediaObjects = ilRTE::_getMediaObjects($_POST['statutory_regulations'], 0);
     foreach ($oldMediaObjects as $oldMob) {
         $found = false;
         foreach ($curMediaObjects as $curMob) {
             if ($oldMob == $curMob) {
                 $found = true;
                 break;
             }
         }
         if (!$found) {
             if (ilObjMediaObject::_exists($oldMob)) {
                 ilObjMediaObject::_removeUsage($oldMob, 'pays~:html', ilObject::_lookupObjId($this->ref_id));
                 $mob_obj = new ilObjMediaObject($oldMob);
                 $mob_obj->delete();
             }
         }
     }
     $this->genSetData->set('show_sr_shoppingcart', isset($_POST['show_sr_shoppingcart']) ? 1 : 0, 'regulations');
     $this->genSetData->set('attach_sr_invoice', isset($_POST['attach_sr_invoice']) ? 1 : 0, 'regulations');
     $this->StatutoryRegulationsObject();
     ilUtil::sendSuccess($this->lng->txt('pays_updated_general_settings'));
     return true;
 }

 /**
  * synchronises appearances of media objects in $a_text with media
  * object usage table
  *
  * @param	string	$a_text			text, including media object tags
  * @param	string	$a_usage_type	type of context of usage, e.g. cat:html
  * @param	int		$a_usage_id		if of context of usage, e.g. category id
  */
 function _cleanupMediaObjectUsage($a_text, $a_usage_type, $a_usage_id)
 {
     // get current stored mobs
     include_once "./Services/MediaObjects/classes/class.ilObjMediaObject.php";
     $mobs = ilObjMediaObject::_getMobsOfObject($a_usage_type, $a_usage_id);
     while (eregi("data\\/" . CLIENT_ID . "\\/mobs\\/mm_([0-9]+)", $a_text, $found)) {
         $a_text = str_replace($found[0], "", $a_text);
         if (!in_array($found[1], $mobs)) {
             // save usage if missing
             ilObjMediaObject::_saveUsage($found[1], $a_usage_type, $a_usage_id);
         } else {
             // if already saved everything ok -> take mob out of mobs array
             unset($mobs[$found[1]]);
         }
     }
     // remaining usages are not in text anymore -> delete them
     // and media objects (note: delete method of ilObjMediaObject
     // checks whether object is used in another context; if yes,
     // the object is not deleted!)
     foreach ($mobs as $mob) {
         ilObjMediaObject::_removeUsage($mob, $a_usage_type, $a_usage_id);
         $mob_obj =& new ilObjMediaObject($mob);
         $mob_obj->delete();
     }
 }

 /**
  * Deletes the survey from the database
  * 
  * @access	public
  */
 function deleteSurveyRecord()
 {
     global $ilDB;
     $affectedRows = $ilDB->manipulateF("DELETE FROM svy_svy WHERE survey_id = %s", array('integer'), array($this->getSurveyId()));
     $result = $ilDB->queryF("SELECT questionblock_fi FROM svy_qblk_qst WHERE survey_fi = %s", array('integer'), array($this->getSurveyId()));
     $questionblocks = array();
     while ($row = $ilDB->fetchAssoc($result)) {
         array_push($questionblocks, $row["questionblock_fi"]);
     }
     if (count($questionblocks)) {
         $affectedRows = $ilDB->manipulate("DELETE FROM svy_qblk WHERE " . $ilDB->in('questionblock_id', $questionblocks, false, 'integer'));
     }
     $affectedRows = $ilDB->manipulateF("DELETE FROM svy_qblk_qst WHERE survey_fi = %s", array('integer'), array($this->getSurveyId()));
     $this->deleteAllUserData();
     $affectedRows = $ilDB->manipulateF("DELETE FROM svy_anonymous WHERE survey_fi = %s", array('integer'), array($this->getSurveyId()));
     // delete export files
     include_once "./Services/Utilities/classes/class.ilUtil.php";
     $svy_data_dir = ilUtil::getDataDir() . "/svy_data";
     $directory = $svy_data_dir . "/svy_" . $this->getId();
     if (is_dir($directory)) {
         include_once "./Services/Utilities/classes/class.ilUtil.php";
         ilUtil::delDir($directory);
     }
     include_once "./Services/MediaObjects/classes/class.ilObjMediaObject.php";
     $mobs = ilObjMediaObject::_getMobsOfObject("svy:html", $this->getId());
     // remaining usages are not in text anymore -> delete them
     // and media objects (note: delete method of ilObjMediaObject
     // checks whether object is used in another context; if yes,
     // the object is not deleted!)
     foreach ($mobs as $mob) {
         ilObjMediaObject::_removeUsage($mob, "svy:html", $this->getId());
         $mob_obj =& new ilObjMediaObject($mob);
         $mob_obj->delete();
     }
 }

 /**
 * Deletes a question and all materials from the database
 *
 * @param integer $question_id The database id of the question
 * @access private
 */
 function delete($question_id)
 {
     global $ilDB;
     if ($question_id < 1) {
         return;
     }
     $result = $ilDB->queryF("SELECT obj_fi FROM svy_question WHERE question_id = %s", array('integer'), array($question_id));
     if ($result->numRows() == 1) {
         $row = $ilDB->fetchAssoc($result);
         $obj_id = $row["obj_fi"];
     } else {
         return;
     }
     $affectedRows = $ilDB->manipulateF("DELETE FROM svy_answer WHERE question_fi = %s", array('integer'), array($question_id));
     $affectedRows = $ilDB->manipulateF("DELETE FROM svy_constraint WHERE question_fi = %s", array('integer'), array($question_id));
     $result = $ilDB->queryF("SELECT constraint_fi FROM svy_qst_constraint WHERE question_fi = %s", array('integer'), array($question_id));
     while ($row = $ilDB->fetchObject($result)) {
         $affectedRows = $ilDB->manipulateF("DELETE FROM svy_constraint WHERE constraint_id = %s", array('integer'), array($row->constraint_fi));
     }
     $affectedRows = $ilDB->manipulateF("DELETE FROM svy_qst_constraint WHERE question_fi = %s", array('integer'), array($question_id));
     $affectedRows = $ilDB->manipulateF("DELETE FROM svy_qblk_qst WHERE question_fi = %s", array('integer'), array($question_id));
     $affectedRows = $ilDB->manipulateF("DELETE FROM svy_qst_oblig WHERE question_fi = %s", array('integer'), array($question_id));
     $affectedRows = $ilDB->manipulateF("DELETE FROM svy_svy_qst WHERE question_fi = %s", array('integer'), array($question_id));
     $affectedRows = $ilDB->manipulateF("DELETE FROM svy_variable WHERE question_fi = %s", array('integer'), array($question_id));
     $affectedRows = $ilDB->manipulateF("DELETE FROM svy_question WHERE question_id = %s", array('integer'), array($question_id));
     $this->deleteAdditionalTableData($question_id);
     $affectedRows = $ilDB->manipulateF("DELETE FROM svy_material WHERE question_fi = %s", array('integer'), array($question_id));
     include_once "./Services/Link/classes/class.ilInternalLink.php";
     ilInternalLink::_deleteAllLinksOfSource("sqst", $question_id);
     $directory = CLIENT_WEB_DIR . "/survey/" . $obj_id . "/{$question_id}";
     if (preg_match("/\\d+/", $obj_id) and preg_match("/\\d+/", $question_id) and is_dir($directory)) {
         include_once "./Services/Utilities/classes/class.ilUtil.php";
         ilUtil::delDir($directory);
     }
     include_once "./Services/MediaObjects/classes/class.ilObjMediaObject.php";
     $mobs = ilObjMediaObject::_getMobsOfObject("spl:html", $question_id);
     // remaining usages are not in text anymore -> delete them
     // and media objects (note: delete method of ilObjMediaObject
     // checks whether object is used in another context; if yes,
     // the object is not deleted!)
     foreach ($mobs as $mob) {
         ilObjMediaObject::_removeUsage($mob, "spl:html", $question_id);
         $mob_obj =& new ilObjMediaObject($mob);
         $mob_obj->delete();
     }
     include_once "./Modules/Survey/classes/class.ilSurveySkill.php";
     ilSurveySkill::handleQuestionDeletion($question_id, $obj_id);
     // #12772 - untie question copies from pool question
     $ilDB->manipulate("UPDATE svy_question" . " SET original_id = NULL" . " WHERE original_id  = " . $ilDB->quote($question_id, "integer"));
 }

 public function addThreadObject($a_prevent_redirect = false)
 {
     /**
      * @var $ilUser ilObjUser
      * @var $ilAccess ilAccessHandler
      * @var $lng ilLanguage
      */
     global $ilUser, $ilAccess, $lng;
     $frm = $this->object->Forum;
     $frm->setForumId($this->object->getId());
     $frm->setForumRefId($this->object->getRefId());
     if (!$ilAccess->checkAccess('add_thread', '', $this->object->getRefId())) {
         $this->ilias->raiseError($lng->txt('permission_denied'), $this->ilias->error_obj->MESSAGE);
     }
     $frm->setMDB2WhereCondition('top_frm_fk = %s ', array('integer'), array($frm->getForumId()));
     $topicData = $frm->getOneTopic();
     $this->initTopicCreateForm();
     if ($this->create_topic_form_gui->checkInput()) {
         require_once 'Services/Captcha/classes/class.ilCaptchaUtil.php';
         if ($ilUser->isAnonymous() && !$ilUser->isCaptchaVerified() && ilCaptchaUtil::isActiveForForum()) {
             $ilUser->setCaptchaVerified(true);
         }
         if ($this->objProperties->isAnonymized()) {
             if (!strlen($this->create_topic_form_gui->getInput('alias'))) {
                 $user_alias = $this->lng->txt('forums_anonymous');
             } else {
                 $user_alias = $this->create_topic_form_gui->getInput('alias');
             }
         } else {
             $user_alias = $ilUser->getLogin();
         }
         $status = 1;
         if ($this->objProperties->isPostActivationEnabled() && !$this->is_moderator || $this->objCurrentPost->isAnyParentDeactivated()) {
             $status = 0;
         }
         // build new thread
         $newPost = $frm->generateThread($topicData['top_pk'], $ilUser->getId(), $this->objProperties->isAnonymized() ? 0 : $ilUser->getId(), $this->handleFormInput($this->create_topic_form_gui->getInput('subject'), false), ilRTE::_replaceMediaObjectImageSrc($this->create_topic_form_gui->getInput('message'), 0), $this->create_topic_form_gui->getItemByPostVar('notify') ? (int) $this->create_topic_form_gui->getInput('notify') : 0, $this->create_topic_form_gui->getItemByPostVar('notify_posts') ? (int) $this->create_topic_form_gui->getInput('notify_posts') : 0, $user_alias, '', $status);
         $file = $_FILES['userfile'];
         // file upload
         if (is_array($file) && !empty($file)) {
             $tmp_file_obj = new ilFileDataForum($this->object->getId(), $newPost);
             $tmp_file_obj->storeUploadedFile($file);
         }
         // Visit-Counter
         $frm->setDbTable('frm_data');
         $frm->setMDB2WhereCondition('top_pk = %s ', array('integer'), array($topicData['top_pk']));
         $frm->updateVisits($topicData['top_pk']);
         $frm->setMDB2WhereCondition('thr_top_fk = %s AND thr_subject = %s AND thr_num_posts = 1 ', array('integer', 'text'), array($topicData['top_pk'], $this->create_topic_form_gui->getInput('subject')));
         // copy temporary media objects (frm~)
         include_once 'Services/MediaObjects/classes/class.ilObjMediaObject.php';
         $mediaObjects = ilRTE::_getMediaObjects($this->create_topic_form_gui->getInput('message'), 0);
         foreach ($mediaObjects as $mob) {
             if (ilObjMediaObject::_exists($mob)) {
                 ilObjMediaObject::_removeUsage($mob, 'frm~:html', $ilUser->getId());
                 ilObjMediaObject::_saveUsage($mob, 'frm:html', $newPost);
             }
         }
         if ($this->ilias->getSetting('forum_notification') == 1) {
             // send notification about new topic
             $objPost = new ilForumPost((int) $newPost, $this->is_moderator);
             $post_data = array();
             $post_data = $objPost->getDataAsArray();
             $titles = $this->getTitlesByRefId(array($this->object->getRefId()));
             $post_data["top_name"] = $titles[0];
             $post_data["ref_id"] = $this->object->getRefId();
             $frm->sendForumNotifications($post_data);
         }
         if (!$a_prevent_redirect) {
             ilUtil::sendSuccess($this->lng->txt('forums_thread_new_entry'), true);
             $this->ctrl->redirect($this);
         } else {
             return $newPost;
         }
     } else {
         $this->create_topic_form_gui->setValuesByPost();
         if (!$this->objProperties->isAnonymized()) {
             $this->create_topic_form_gui->getItemByPostVar('alias')->setValue($ilUser->getLogin());
         }
         return $this->tpl->setContent($this->create_topic_form_gui->getHTML());
     }
 }

 /**
 * Deletes the test and all related objects, files and database entries
 *
 * @access	public
 */
 function deleteTest()
 {
     global $ilDB;
     // first of all remove all test editings, because the delete statements used for this
     // contain a subquery for active ids, that are deleted in the next steps
     $this->removeAllTestEditings();
     $result = $ilDB->queryF("SELECT active_id FROM tst_active WHERE test_fi = %s", array('integer'), array($this->getTestId()));
     $active_array = array();
     while ($row = $ilDB->fetchAssoc($result)) {
         array_push($active_array, $row["active_id"]);
     }
     $affectedRows = $ilDB->manipulateF("DELETE FROM tst_active WHERE test_fi = %s", array('integer'), array($this->getTestId()));
     if (count($active_array)) {
         foreach ($active_array as $active_id) {
             $affectedRows = $ilDB->manipulateF("DELETE FROM tst_times WHERE active_fi = %s", array('integer'), array($active_id));
             $affectedRows = $ilDB->manipulateF("DELETE FROM tst_sequence WHERE active_fi = %s", array('integer'), array($active_id));
         }
     }
     $affectedRows = $ilDB->manipulateF("DELETE FROM tst_mark WHERE test_fi = %s", array('integer'), array($this->getTestId()));
     $result = $ilDB->queryF("SELECT question_fi FROM tst_test_question WHERE test_fi = %s", array('integer'), array($this->getTestId()));
     while ($row = $ilDB->fetchAssoc($result)) {
         $this->removeQuestion($row["question_fi"]);
     }
     $affectedRows = $ilDB->manipulateF("DELETE FROM tst_tests WHERE test_id = %s", array('integer'), array($this->getTestId()));
     $affectedRows = $ilDB->manipulateF("DELETE FROM tst_test_random WHERE test_fi = %s", array('integer'), array($this->getTestId()));
     // this delete is allready done by call to removeAllTestEditings some lines above
     /*$affectedRows = $ilDB->manipulateF("DELETE FROM tst_test_rnd_qst WHERE tst_test_rnd_qst.active_fi IN  (SELECT active_id FROM tst_active WHERE test_fi = %s)",
     			array('integer'),
     			array($this->getTestId())
     		);*/
     // moved to top of this method because this method performs delete statements,
     // that use a subquery for active ids, that are allready deleted some lines above
     //$this->removeAllTestEditings();
     $affectedRows = $ilDB->manipulateF("DELETE FROM tst_test_question WHERE test_fi = %s", array('integer'), array($this->getTestId()));
     if ($this->isRandomTest()) {
         $this->removeDuplicatedQuestionpools();
     }
     // delete export files
     include_once "./Services/Utilities/classes/class.ilUtil.php";
     $tst_data_dir = ilUtil::getDataDir() . "/tst_data";
     $directory = $tst_data_dir . "/tst_" . $this->getId();
     if (is_dir($directory)) {
         include_once "./Services/Utilities/classes/class.ilUtil.php";
         ilUtil::delDir($directory);
     }
     include_once "./Services/MediaObjects/classes/class.ilObjMediaObject.php";
     $mobs = ilObjMediaObject::_getMobsOfObject("tst:html", $this->getId());
     // remaining usages are not in text anymore -> delete them
     // and media objects (note: delete method of ilObjMediaObject
     // checks whether object is used in another context; if yes,
     // the object is not deleted!)
     foreach ($mobs as $mob) {
         ilObjMediaObject::_removeUsage($mob, "tst:html", $this->getId());
         if (ilObjMediaObject::_exists($mob)) {
             $mob_obj =& new ilObjMediaObject($mob);
             $mob_obj->delete();
         }
     }
 }

 /**
  * Deletes a question and all materials from the database
  *
  * @param integer $question_id The database id of the question
  * @access private
  */
 public function delete($question_id)
 {
     global $ilDB, $ilLog;
     if ($question_id < 1) {
         return true;
     }
     // nothing to do
     $result = $ilDB->queryF("SELECT obj_fi FROM qpl_questions WHERE question_id = %s", array('integer'), array($question_id));
     if ($result->numRows() == 1) {
         $row = $ilDB->fetchAssoc($result);
         $obj_id = $row["obj_fi"];
     } else {
         return true;
         // nothing to do
     }
     try {
         $this->deletePageOfQuestion($question_id);
     } catch (Exception $e) {
         $ilLog->write("EXCEPTION: Could not delete page of question {$question_id}: {$e}");
         return false;
     }
     $affectedRows = $ilDB->manipulateF("DELETE FROM qpl_questions WHERE question_id = %s", array('integer'), array($question_id));
     if ($affectedRows == 0) {
         return false;
     }
     try {
         $this->deleteAdditionalTableData($question_id);
         $this->deleteAnswers($question_id);
         $this->feedbackOBJ->deleteGenericFeedbacks($question_id, $this->isAdditionalContentEditingModePageObject());
         $this->feedbackOBJ->deleteSpecificAnswerFeedbacks($question_id, $this->isAdditionalContentEditingModePageObject());
     } catch (Exception $e) {
         $ilLog->write("EXCEPTION: Could not delete additional table data of question {$question_id}: {$e}");
         return false;
     }
     try {
         // delete the question in the tst_test_question table (list of test questions)
         $affectedRows = $ilDB->manipulateF("DELETE FROM tst_test_question WHERE question_fi = %s", array('integer'), array($question_id));
     } catch (Exception $e) {
         $ilLog->write("EXCEPTION: Could not delete delete question {$question_id} from a test: {$e}");
         return false;
     }
     try {
         // delete suggested solutions contained in the question
         $affectedRows = $ilDB->manipulateF("DELETE FROM qpl_sol_sug WHERE question_fi = %s", array('integer'), array($question_id));
     } catch (Exception $e) {
         $ilLog->write("EXCEPTION: Could not delete suggested solutions of question {$question_id}: {$e}");
         return false;
     }
     try {
         $directory = CLIENT_WEB_DIR . "/assessment/" . $obj_id . "/{$question_id}";
         if (preg_match("/\\d+/", $obj_id) and preg_match("/\\d+/", $question_id) and is_dir($directory)) {
             include_once "./Services/Utilities/classes/class.ilUtil.php";
             ilUtil::delDir($directory);
         }
     } catch (Exception $e) {
         $ilLog->write("EXCEPTION: Could not delete question file directory {$directory} of question {$question_id}: {$e}");
         return false;
     }
     try {
         include_once "./Services/MediaObjects/classes/class.ilObjMediaObject.php";
         $mobs = ilObjMediaObject::_getMobsOfObject("qpl:html", $question_id);
         // remaining usages are not in text anymore -> delete them
         // and media objects (note: delete method of ilObjMediaObject
         // checks whether object is used in another context; if yes,
         // the object is not deleted!)
         foreach ($mobs as $mob) {
             ilObjMediaObject::_removeUsage($mob, "qpl:html", $question_id);
             if (ilObjMediaObject::_exists($mob)) {
                 $mob_obj =& new ilObjMediaObject($mob);
                 $mob_obj->delete();
             }
         }
     } catch (Exception $e) {
         $ilLog->write("EXCEPTION: Error deleting the media objects of question {$question_id}: {$e}");
         return false;
     }
     require_once 'Modules/TestQuestionPool/classes/class.ilAssQuestionHintTracking.php';
     ilAssQuestionHintTracking::deleteRequestsByQuestionIds(array($question_id));
     require_once 'Modules/TestQuestionPool/classes/class.ilAssQuestionHintList.php';
     ilAssQuestionHintList::deleteHintsByQuestionIds(array($question_id));
     require_once 'Modules/TestQuestionPool/classes/class.ilAssQuestionSkillAssignmentList.php';
     $assignmentList = new ilAssQuestionSkillAssignmentList($ilDB);
     $assignmentList->setParentObjId($obj_id);
     $assignmentList->setQuestionIdFilter($question_id);
     $assignmentList->loadFromDb();
     foreach ($assignmentList->getAssignmentsByQuestionId($question_id) as $assignment) {
         /* @var ilAssQuestionSkillAssignment $assignment */
         $assignment->deleteFromDb();
     }
     try {
         // update question count of question pool
         include_once "./Modules/TestQuestionPool/classes/class.ilObjQuestionPool.php";
         ilObjQuestionPool::_updateQuestionCount($this->getObjId());
     } catch (Exception $e) {
//.........这里部分代码省略.........

    /**
     * delete post and sub-posts
     * @param	integer	$post: ID	
     * @access	public
     * @return	integer	0 or thread-ID
     */
    public function deletePost($post)
    {
        global $ilDB;
        include_once "./Modules/Forum/classes/class.ilObjForum.php";
        // delete tree and get id's of all posts to delete
        $p_node = $this->getPostNode($post);
        $del_id = $this->deletePostTree($p_node);
        // Delete User read entries
        foreach ($del_id as $post_id) {
            ilObjForum::_deleteReadEntries($post_id);
        }
        // DELETE ATTACHMENTS ASSIGNED TO POST
        $this->__deletePostFiles($del_id);
        $dead_pos = count($del_id);
        $dead_thr = 0;
        // if deletePost is thread opener ...
        if ($p_node["parent"] == 0) {
            // delete thread access data
            include_once './Modules/Forum/classes/class.ilObjForum.php';
            ilObjForum::_deleteAccessEntries($p_node['tree']);
            // delete thread
            $dead_thr = $p_node["tree"];
            $statement = $ilDB->manipulateF('
				DELETE FROM frm_threads
				WHERE thr_pk = %s', array('integer'), array($p_node['tree']));
            // update num_threads
            $statement = $ilDB->manipulateF('
				UPDATE frm_data 
				SET top_num_threads = top_num_threads - 1 
				WHERE top_frm_fk = %s', array('integer'), array($this->id));
            // delete all related news
            $posset = $ilDB->queryf('
				SELECT * FROM frm_posts
				WHERE pos_thr_fk = %s', array('integer'), array($p_node['tree']));
            while ($posrec = $ilDB->fetchAssoc($posset)) {
                include_once "./Services/News/classes/class.ilNewsItem.php";
                $news_id = ilNewsItem::getFirstNewsIdForContext($this->id, "frm", $posrec["pos_pk"], "pos");
                if ($news_id > 0) {
                    $news_item = new ilNewsItem($news_id);
                    $news_item->delete();
                }
                try {
                    include_once 'Services/MediaObjects/classes/class.ilObjMediaObject.php';
                    $mobs = ilObjMediaObject::_getMobsOfObject('frm:html', $posrec['pos_pk']);
                    foreach ($mobs as $mob) {
                        if (ilObjMediaObject::_exists($mob)) {
                            ilObjMediaObject::_removeUsage($mob, 'frm:html', $posrec['pos_pk']);
                            $mob_obj = new ilObjMediaObject($mob);
                            $mob_obj->delete();
                        }
                    }
                } catch (Exception $e) {
                }
            }
            // delete all posts of this thread
            $statement = $ilDB->manipulateF('
				DELETE FROM frm_posts
				WHERE pos_thr_fk = %s', array('integer'), array($p_node['tree']));
        } else {
            // delete this post and its sub-posts
            for ($i = 0; $i < $dead_pos; $i++) {
                $statement = $ilDB->manipulateF('
					DELETE FROM frm_posts
					WHERE pos_pk = %s', array('integer'), array($del_id[$i]));
                // delete related news item
                include_once "./Services/News/classes/class.ilNewsItem.php";
                $news_id = ilNewsItem::getFirstNewsIdForContext($this->id, "frm", $del_id[$i], "pos");
                if ($news_id > 0) {
                    $news_item = new ilNewsItem($news_id);
                    $news_item->delete();
                }
                try {
                    include_once 'Services/MediaObjects/classes/class.ilObjMediaObject.php';
                    $mobs = ilObjMediaObject::_getMobsOfObject('frm:html', $del_id[$i]);
                    foreach ($mobs as $mob) {
                        if (ilObjMediaObject::_exists($mob)) {
                            ilObjMediaObject::_removeUsage($mob, 'frm:html', $del_id[$i]);
                            $mob_obj = new ilObjMediaObject($mob);
                            $mob_obj->delete();
                        }
                    }
                } catch (Exception $e) {
                }
            }
            // update num_posts in frm_threads
            $statement = $ilDB->manipulateF('
				UPDATE frm_threads
				SET thr_num_posts = thr_num_posts - %s
				WHERE thr_pk = %s', array('integer', 'integer'), array($dead_pos, $p_node['tree']));
            // get latest post of thread and update last_post
            $res1 = $ilDB->queryf('
				SELECT * FROM frm_posts 
				WHERE pos_thr_fk = %s
				ORDER BY pos_date DESC', array('integer'), array($p_node['tree']));
//.........这里部分代码省略.........