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263 lines
8.9 KiB
263 lines
8.9 KiB
<?php
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// $Id: CourseRecycler.class.php 10156 2006-11-23 08:59:13Z elixir_inter $
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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_linked_resources = Database :: get_course_table(LINKED_RESOURCES_TABLE, $this->course->destination_db);
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$table_item_properties = Database::get_course_table(ITEM_PROPERTY_TABLE);
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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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$sql = "DELETE FROM ".$table_item_properties." WHERE tool ='".$resource->get_tool()."' AND ref=".$id;
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api_sql_query($sql);
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}
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}
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$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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//$this->recycle_forums();
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//$this->recycle_forum_categories();
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$this->recycle_quizzes();
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$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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$table = Database :: get_course_table(DOCUMENT_TABLE);
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foreach ($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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$table = Database :: get_course_table(LINK_TABLE);
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$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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$table_forum = Database :: get_course_table(FORUM_TABLE);
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$table_topic = Database :: get_course_table(FORUM_TOPIC_TABLE);
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$table_post = Database :: get_course_table(TOOL_FORUM_POST_TABLE);
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$table_posttext = Database :: get_course_table(TOOL_FORUM_POST_TEXT_TABLE);
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$forum_ids = implode(',', (array_keys($this->course->resources[RESOURCE_FORUM])));
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$sql = "SELECT post_id FROM ".$table_post." WHERE forum_id IN (".$forum_ids.")";
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$res = api_sql_query($sql,__FILE__,__LINE__);
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$post_ids = array ();
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while ($obj = mysql_fetch_object($res))
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{
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$post_ids[] = $obj->post_id;
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}
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$post_ids = implode(',', $post_ids);
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$sql = "DELETE FROM ".$table_posttext." WHERE post_id IN(".$post_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 ".$table_topic." WHERE forum_id IN(".$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(TOOL_FORUM_TABLE);
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$table_forumcat = Database :: get_course_table(TOOL_FORUM_CATEGORY_TABLE);
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$sql = "SELECT fc.cat_id FROM ".$table_forumcat." fc LEFT JOIN ".$table_forum." f ON fc.cat_id=f.cat_id 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 link-categories from current course without links
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*/
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function recycle_link_categories()
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{
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$link_cat_table = Database :: get_course_table(LINK_CATEGORY_TABLE);
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$link_table = Database :: get_course_table(LINK_TABLE);
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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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$table = Database :: get_course_table(AGENDA_TABLE);
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$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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$table = Database :: get_course_table(ANNOUNCEMENT_TABLE);
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$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($sql,__FILE__,__LINE__);
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}
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}
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/**
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* Recycle quizzes
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*/
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function recycle_quizzes()
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{
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if ($this->course->has_resources(RESOURCE_QUIZ))
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{
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$table_qui = Database :: get_course_table(QUIZ_TEST_TABLE);
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$table_rel = Database :: get_course_table(QUIZ_TEST_QUESTION_TABLE);
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$ids = implode(',', (array_keys($this->course->resources[RESOURCE_QUIZ])));
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$sql = "DELETE FROM ".$table_qui." WHERE 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 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(LEARNPATH_MAIN_TABLE);
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$table_chapter = Database :: get_course_table(LEARNPATH_CHAPTER_TABLE);
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$table_item = Database :: get_course_table(LEARNPATH_ITEM_TABLE);
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$table_tool = Database::get_course_table(TOOL_LIST_TABLE);
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foreach($this->course->resources[RESOURCE_LEARNPATH] as $id => $learnpath)
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{
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$sql = "DELETE FROM $table_tool WHERE link='".mysql_real_escape_string('learnpath/learnpath_handler.php?learnpath_id='.$id)."'";
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api_sql_query($sql,__FILE__,__LINE__);
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}
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$ids = implode(',', (array_keys($this->course->resources[RESOURCE_LEARNPATH])));
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$sql = "SELECT id FROM ".$table_chapter." WHERE learnpath_id IN (".$ids.")";
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$db_result = api_sql_query($sql,__FILE__,__LINE__);
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$chapter_ids = array ();
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while ($chap = mysql_fetch_object($db_result))
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{
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$chapter_ids[] = $chap->id;
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}
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if( count($chapter_ids) > 0 )
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{
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$chap_ids = implode(',', $chapter_ids);
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$sql = "DELETE FROM ".$table_item." WHERE chapter_id IN (".$chap_ids.")";
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api_sql_query($sql,__FILE__,__LINE__);
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$sql = "DELETE FROM ".$table_chapter." WHERE id IN (".$chap_ids.")";
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api_sql_query($sql,__FILE__,__LINE__);
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}
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$sql = "DELETE FROM ".$table_main." WHERE learnpath_id IN(".$ids.")";
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api_sql_query($sql,__FILE__,__LINE__);
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}
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}
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/**
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* Delete course description
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*/
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function recycle_cours_description()
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{
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if ($this->course->has_resources(RESOURCE_COURSEDESCRIPTION))
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{
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$table = Database :: get_course_table(COURSE_DESCRIPTION_TABLE);
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$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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?>
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