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380 lines
14 KiB
380 lines
14 KiB
<?php
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// $Id: CourseRecycler.class.php 12117 2007-04-24 22:06:36Z pcool $
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/*
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==============================================================================
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Dokeos - elearning and course management software
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Copyright (c) 2004 Dokeos S.A.
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Copyright (c) 2003 Ghent University (UGent)
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Copyright (c) 2001 Universite catholique de Louvain (UCL)
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Copyright (c) Bart Mollet (bart.mollet@hogent.be)
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For a full list of contributors, see "credits.txt".
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The full license can be read in "license.txt".
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either version 2
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of the License, or (at your option) any later version.
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See the GNU General Public License for more details.
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Contact address: Dokeos, 44 rue des palais, B-1030 Brussels, Belgium
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Mail: info@dokeos.com
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==============================================================================
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*/
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require_once ('Course.class.php');
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require_once ('rmdirr.php');
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/**
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* Class to delete items from a Dokeos-course
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* @author Bart Mollet <bart.mollet@hogent.be>
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* @package dokeos.backup
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*/
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class CourseRecycler
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{
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/**
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* A course-object with the items to delete
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*/
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var $course;
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/**
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* Create a new CourseRecycler
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* @param course $course The course-object which contains the items to
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* delete
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*/
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function CourseRecycler($course)
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{
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$this->course = $course;
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}
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/**
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* Delete all items from the course.
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* This deletes all items in the course-object from the current Dokeos-
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* course
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*/
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function recycle()
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{
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$table_tool_intro = Database::get_course_table(TABLE_TOOL_INTRO);
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$table_linked_resources = Database :: get_course_table(TABLE_LINKED_RESOURCES);
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$table_item_properties = Database::get_course_table(TABLE_ITEM_PROPERTY);
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foreach ($this->course->resources as $type => $resources)
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{
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foreach ($resources as $id => $resource)
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{
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$sql = "DELETE FROM ".$table_linked_resources." WHERE (source_type = '".$type."' AND source_id = '".$id."') OR (resource_type = '".$type."' AND resource_id = '".$id."') ";
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api_sql_query($sql,__FILE__,__LINE__);
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if(is_numeric($id))
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{
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$sql = "DELETE FROM ".$table_item_properties." WHERE tool ='".$resource->get_tool()."' AND ref=".$id;
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api_sql_query($sql, __FILE__, __LINE__);
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}
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elseif ($type == RESOURCE_TOOL_INTRO)
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{
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$sql = "DELETE FROM $table_tool_intro WHERE id='$id'";
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api_sql_query($sql, __FILE__, __LINE__);
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}
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}
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}
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$this->recycle_links();
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$this->recycle_link_categories();
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$this->recycle_events();
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$this->recycle_announcements();
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$this->recycle_documents();
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// Enabled by Ivan Tcholakov, 27-AUG-2009.
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////$this->recycle_forums();
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////$this->recycle_forum_categories();
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$this->recycle_forums();
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$this->recycle_forum_categories();
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//
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$this->recycle_quizzes();
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$this->recycle_surveys();
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$this->recycle_learnpaths();
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$this->recycle_cours_description();
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}
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/**
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* Delete documents
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*/
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function recycle_documents()
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{
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if ($this->course->has_resources(RESOURCE_DOCUMENT))
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{
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$table = Database :: get_course_table(TABLE_DOCUMENT);
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foreach ($this->course->resources[RESOURCE_DOCUMENT] as $id => $document)
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{
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rmdirr($this->course->backup_path.'/'.$document->path);
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}
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$ids = implode(',', (array_keys($this->course->resources[RESOURCE_DOCUMENT])));
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$sql = "DELETE FROM ".$table." WHERE id IN(".$ids.")";
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api_sql_query($sql,__FILE__,__LINE__);
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}
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}
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/**
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* Delete links
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*/
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function recycle_links()
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{
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if ($this->course->has_resources(RESOURCE_LINK))
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{
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$table = Database :: get_course_table(TABLE_LINK);
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$ids = implode(',', (array_keys($this->course->resources[RESOURCE_LINK])));
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$sql = "DELETE FROM ".$table." WHERE id IN(".$ids.")";
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api_sql_query($sql,__FILE__,__LINE__);
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}
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}
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/**
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* Delete forums
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*/
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function recycle_forums()
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{
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if ($this->course->has_resources(RESOURCE_FORUM))
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{
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$table_category = Database :: get_course_table(TABLE_FORUM_CATEGORY);
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$table_forum = Database :: get_course_table(TABLE_FORUM);
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$table_thread = Database :: get_course_table(TABLE_FORUM_THREAD);
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$table_post = Database :: get_course_table(TABLE_FORUM_POST);
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$table_attachment = Database::get_course_table(TABLE_FORUM_ATTACHMENT);
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$table_notification = Database::get_course_table(TABLE_FORUM_NOTIFICATION);
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$table_mail_queue = Database::get_course_table(TABLE_FORUM_MAIL_QUEUE);
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$table_thread_qualify = Database::get_course_table(TABLE_FORUM_THREAD_QUALIFY);
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$table_thread_qualify_log = Database::get_course_table(TABLE_FORUM_THREAD_QUALIFY_LOG);
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$forum_ids = implode(',', (array_keys($this->course->resources[RESOURCE_FORUM])));
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$sql = "DELETE FROM ".$table_attachment.
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" USING ".$table_attachment." INNER JOIN ".$table_post.
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" WHERE ".$table_attachment.".post_id = ".$table_post.".post_id".
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" AND ".$table_post.".forum_id IN(".$forum_ids.");";
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api_sql_query($sql,__FILE__,__LINE__);
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$sql = "DELETE FROM ".$table_mail_queue.
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" USING ".$table_mail_queue." INNER JOIN ".$table_post.
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" WHERE ".$table_mail_queue.".post_id = ".$table_post.".post_id".
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" AND ".$table_post.".forum_id IN(".$forum_ids.");";
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api_sql_query($sql,__FILE__,__LINE__);
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// Just in case, deleting in the same table using thread_id as record-linker.
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$sql = "DELETE FROM ".$table_mail_queue.
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" USING ".$table_mail_queue." INNER JOIN ".$table_thread.
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" WHERE ".$table_mail_queue.".thread_id = ".$table_thread.".thread_id".
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" AND ".$table_thread.".forum_id IN(".$forum_ids.");";
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api_sql_query($sql,__FILE__,__LINE__);
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$sql = "DELETE FROM ".$table_thread_qualify.
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" USING ".$table_thread_qualify." INNER JOIN ".$table_thread.
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" WHERE ".$table_thread_qualify.".thread_id = ".$table_thread.".thread_id".
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" AND ".$table_thread.".forum_id IN(".$forum_ids.");";
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api_sql_query($sql,__FILE__,__LINE__);
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$sql = "DELETE FROM ".$table_thread_qualify_log.
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" USING ".$table_thread_qualify_log." INNER JOIN ".$table_thread.
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" WHERE ".$table_thread_qualify_log.".thread_id = ".$table_thread.".thread_id".
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" AND ".$table_thread.".forum_id IN(".$forum_ids.");";
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api_sql_query($sql,__FILE__,__LINE__);
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$sql = "DELETE FROM ".$table_notification." WHERE forum_id IN(".$forum_ids.")";
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api_sql_query($sql,__FILE__,__LINE__);
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$sql = "DELETE FROM ".$table_post." WHERE forum_id IN(".$forum_ids.")";
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api_sql_query($sql,__FILE__,__LINE__);
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$sql = "DELETE FROM ".$table_thread." WHERE forum_id IN(".$forum_ids.")";
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api_sql_query($sql,__FILE__,__LINE__);
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$sql = "DELETE FROM ".$table_forum." WHERE forum_id IN(".$forum_ids.")";
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api_sql_query($sql,__FILE__,__LINE__);
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}
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}
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/**
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* Delete forum-categories
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* Deletes all forum-categories from current course without forums
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*/
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function recycle_forum_categories()
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{
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$table_forum = Database :: get_course_table(TABLE_FORUM);
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$table_forumcat = Database :: get_course_table(TABLE_FORUM_CATEGORY);
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$sql = "SELECT fc.cat_id FROM ".$table_forumcat." fc LEFT JOIN ".$table_forum." f ON fc.cat_id=f.forum_category WHERE f.forum_id IS NULL";
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$res = api_sql_query($sql,__FILE__,__LINE__);
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while ($obj = mysql_fetch_object($res))
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{
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$sql = "DELETE FROM ".$table_forumcat." WHERE cat_id = ".$obj->cat_id;
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api_sql_query($sql,__FILE__,__LINE__);
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}
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}
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/**
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* Delete link-categories
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* Deletes all empty link-categories (=without links) from current course
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*/
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function recycle_link_categories()
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{
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$link_cat_table = Database :: get_course_table(TABLE_LINK_CATEGORY);
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$link_table = Database :: get_course_table(TABLE_LINK);
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$sql = "SELECT lc.id FROM ".$link_cat_table." lc LEFT JOIN ".$link_table." l ON lc.id=l.category_id WHERE l.id IS NULL";
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$res = api_sql_query($sql,__FILE__,__LINE__);
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while ($obj = mysql_fetch_object($res))
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{
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$sql = "DELETE FROM ".$link_cat_table." WHERE id = ".$obj->id;
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api_sql_query($sql,__FILE__,__LINE__);
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}
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}
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/**
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* Delete events
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*/
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function recycle_events()
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{
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if ($this->course->has_resources(RESOURCE_EVENT))
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{
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$table = Database :: get_course_table(TABLE_AGENDA);
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$ids = implode(',', (array_keys($this->course->resources[RESOURCE_EVENT])));
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$sql = "DELETE FROM ".$table." WHERE id IN(".$ids.")";
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api_sql_query($sql,__FILE__,__LINE__);
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}
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}
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/**
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* Delete announcements
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*/
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function recycle_announcements()
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{
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if ($this->course->has_resources(RESOURCE_ANNOUNCEMENT))
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{
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$table = Database :: get_course_table(TABLE_ANNOUNCEMENT);
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$ids = implode(',', (array_keys($this->course->resources[RESOURCE_ANNOUNCEMENT])));
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$sql = "DELETE FROM ".$table." WHERE id IN(".$ids.")";
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api_sql_query($sql,__FILE__,__LINE__);
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}
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}
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/**
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* Recycle quizzes - doesn't remove the questions and their answers, as they might still be used later
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*/
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function recycle_quizzes()
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{
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if ($this->course->has_resources(RESOURCE_QUIZ))
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{
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$table_qui_que = Database :: get_course_table(TABLE_QUIZ_QUESTION);
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$table_qui_ans = Database :: get_course_table(TABLE_QUIZ_ANSWER);
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$table_qui = Database :: get_course_table(TABLE_QUIZ_TEST);
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$table_rel = Database :: get_course_table(TABLE_QUIZ_TEST_QUESTION);
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$ids = array_keys($this->course->resources[RESOURCE_QUIZ]);
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$delete_orphan_questions = in_array(-1, $ids);
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$ids = implode(',', $ids);
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// Deletion of the normal tests, questions in them are not deleted, they become orphan at this moment.
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$sql = "DELETE FROM ".$table_qui." WHERE id <> -1 AND id IN(".$ids.")";
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api_sql_query($sql,__FILE__,__LINE__);
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$sql = "DELETE FROM ".$table_rel." WHERE exercice_id <> -1 AND exercice_id IN(".$ids.")";
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api_sql_query($sql,__FILE__,__LINE__);
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// Identifying again and deletion of the orphan questions, if it was desired.
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if ($delete_orphan_questions)
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{
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$sql = 'SELECT questions.id FROM '.$table_qui_que.
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' as questions LEFT JOIN '.$table_rel.' as quizz_questions ON questions.id=quizz_questions.question_id LEFT JOIN '.$table_qui.
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' as exercices ON exercice_id=exercices.id WHERE quizz_questions.exercice_id IS NULL OR exercices.active = -1'; // active = -1 means "deleted" test.
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$db_result = api_sql_query($sql, __FILE__, __LINE__);
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if (Database::num_rows($db_result) > 0)
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{
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$orphan_ids = array();
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while ($obj = Database::fetch_object($db_result))
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{
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$orphan_ids[] = $obj->id;
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}
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$orphan_ids = implode(',', $orphan_ids);
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$sql = "DELETE FROM ".$table_rel." WHERE question_id IN(".$orphan_ids.")";
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api_sql_query($sql,__FILE__,__LINE__);
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$sql = "DELETE FROM ".$table_qui_ans." WHERE question_id IN(".$orphan_ids.")";
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api_sql_query($sql,__FILE__,__LINE__);
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$sql = "DELETE FROM ".$table_qui_que." WHERE id IN(".$orphan_ids.")";
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api_sql_query($sql,__FILE__,__LINE__);
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}
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}
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}
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// Purge "deleted" tests (active = -1).
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$sql = "DELETE FROM ".$table_qui." WHERE active = -1";
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api_sql_query($sql,__FILE__,__LINE__);
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}
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/**
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* Recycle surveys - removes everything
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*/
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function recycle_surveys()
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{
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if ($this->course->has_resources(RESOURCE_SURVEY))
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{
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$table_survey = Database :: get_course_table(TABLE_SURVEY);
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$table_survey_q = Database :: get_course_table(TABLE_SURVEY_QUESTION);
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$table_survey_q_o = Database :: get_course_table(TABLE_SURVEY_QUESTION_OPTION);
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$table_survey_a = Database :: get_course_Table(TABLE_SURVEY_ANSWER);
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$table_survey_i = Database :: get_course_table(TABLE_SURVEY_INVITATION);
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$ids = implode(',', (array_keys($this->course->resources[RESOURCE_SURVEY])));
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$sql = "DELETE FROM ".$table_survey_i." ";
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api_sql_query($sql,__FILE__,__LINE__);
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$sql = "DELETE FROM ".$table_survey_a." WHERE survey_id IN(".$ids.")";
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api_sql_query($sql,__FILE__,__LINE__);
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$sql = "DELETE FROM ".$table_survey_q_o." WHERE survey_id IN(".$ids.")";
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api_sql_query($sql,__FILE__,__LINE__);
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$sql = "DELETE FROM ".$table_survey_q." WHERE survey_id IN(".$ids.")";
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api_sql_query($sql,__FILE__,__LINE__);
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$sql = "DELETE FROM ".$table_survey." WHERE survey_id IN(".$ids.")";
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api_sql_query($sql,__FILE__,__LINE__);
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}
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}
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/**
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* Recycle learnpaths
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*/
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function recycle_learnpaths()
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{
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if ($this->course->has_resources(RESOURCE_LEARNPATH))
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{
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$table_main = Database :: get_course_table(TABLE_LP_MAIN);
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$table_item = Database :: get_course_table(TABLE_LP_ITEM);
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$table_view = Database :: get_course_table(TABLE_LP_VIEW);
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$table_iv = Database :: get_course_table(TABLE_LP_ITEM_VIEW);
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$table_iv_int = Database :: get_course_table(TABLE_LP_IV_INTERACTION);
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$table_tool = Database::get_course_table(TABLE_TOOL_LIST);
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foreach($this->course->resources[RESOURCE_LEARNPATH] as $id => $learnpath)
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{
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//remove links from course homepage
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$sql = "DELETE FROM $table_tool WHERE link LIKE '%lp_controller.php%lp_id=$id%' AND image='scormbuilder.gif'";
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api_sql_query($sql,__FILE__,__LINE__);
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//remove elements from lp_* tables (from bottom-up) by removing interactions, then item_view, then views and items, then paths
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$sql_items = "SELECT id FROM $table_item WHERE lp_id=$id";
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$res_items = api_sql_query($sql_items,__FILE__,__LINE__);
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while ($row_item = Database::fetch_array($res_items))
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{
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//get item views
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$sql_iv = "SELECT id FROM $table_iv WHERE lp_item_id=".$row_item['id'];
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$res_iv = api_sql_query($sql_iv,__FILE__,__LINE__);
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while ($row_iv = Database::fetch_array($res_iv))
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{
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//delete interactions
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$sql_iv_int_del = "DELETE FROM $table_iv_int WHERE lp_iv_id = ".$row_iv['id'];
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$res_iv_int_del = api_sql_query($sql_iv_int_del,__FILE__,__LINE__);
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}
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//delete item views
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$sql_iv_del = "DELETE FROM $table_iv WHERE lp_item_id=".$row_item['id'];
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$res_iv_del = api_sql_query($sql_iv_del,__FILE__,__LINE__);
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}
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//delete items
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$sql_items_del = "DELETE FROM $table_item WHERE lp_id=$id";
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$res_items_del = api_sql_query($sql_items_del,__FILE__,__LINE__);
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//delete views
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$sql_views_del = "DELETE FROM $table_view WHERE lp_id=$id";
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$res_views_del = api_sql_query($sql_views_del,__FILE__,__LINE__);
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//delete lps
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$sql_del = "DELETE FROM $table_main WHERE id = $id";
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$res_del = api_sql_query($sql_del,__FILE__,__LINE__);
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}
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}
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}
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/**
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* Delete course description
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*/
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function recycle_cours_description()
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{
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if ($this->course->has_resources(RESOURCE_COURSEDESCRIPTION))
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{
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$table = Database :: get_course_table(TABLE_COURSE_DESCRIPTION);
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$ids = implode(',', (array_keys($this->course->resources[RESOURCE_COURSEDESCRIPTION])));
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$sql = "DELETE FROM ".$table." WHERE id IN(".$ids.")";
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api_sql_query($sql,__FILE__,__LINE__);
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}
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}
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}
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