class.ilDBUpdate4550.php

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<?php
/* Copyright (c) 1998-2015 ILIAS open source, Extended GPL, see docs/LICENSE */

class ilDBUpdate4550
{
        public static function cleanupOrphanedChatRoomData()
        {
                global $ilDB;

                // Delete orphaned rooms
                if($ilDB->getDBType() == '' || $ilDB->getDBType() == 'mysql' || $ilDB->getDBType() == 'innodb')
                {
                        $ilDB->manipulate('
                        DELETE c1
                        FROM chatroom_settings c1
                        INNER JOIN (
                                SELECT chatroom_settings.room_id
                                FROM chatroom_settings
                                LEFT JOIN object_data
                                        ON object_data.obj_id = chatroom_settings.object_id
                                WHERE object_data.obj_id IS NULL
                        ) c2
                        ON c2.room_id = c1.room_id');
                }
                else
                {
                        // Oracle and Postgres
                        $ilDB->manipulate(' 
                                DELETE FROM chatroom_settings
                                WHERE chatroom_settings.room_id IN (
                                        SELECT chatroom_settings.room_id
                                        FROM chatroom_settings
                                        LEFT JOIN object_data
                                                ON object_data.obj_id = chatroom_settings.object_id
                                        WHERE object_data.obj_id IS NULL
                                )'
                        );
                }

                // Delete orphaned private rooms
                if($ilDB->getDBType() == '' || $ilDB->getDBType() == 'mysql' || $ilDB->getDBType() == 'innodb')
                {
                        $ilDB->manipulate('
                        DELETE c1
                        FROM chatroom_prooms c1
                        INNER JOIN (
                                SELECT chatroom_prooms.proom_id
                                FROM chatroom_prooms
                                LEFT JOIN chatroom_settings
                                        ON chatroom_settings.room_id = chatroom_prooms.parent_id
                                WHERE chatroom_settings.room_id IS NULL
                        ) c2
                        ON c2.proom_id = c1.proom_id');
                }
                else if($ilDB->getDBType() == 'postgres')
                {
                        $ilDB->manipulate(' 
                                DELETE FROM chatroom_prooms
                                WHERE chatroom_prooms.proom_id IN (
                                        SELECT c1.proom_id
                                        FROM chatroom_prooms c1
                                        LEFT JOIN chatroom_settings
                                                ON chatroom_settings.room_id = CAST(c1.parent_id as INT)
                                        WHERE chatroom_settings.room_id IS NULL
                                )'
                        );
                }
                else
                {
                        // Oracle
                        $ilDB->manipulate(' 
                                DELETE FROM chatroom_prooms
                                WHERE chatroom_prooms.proom_id IN (
                                        SELECT c1.proom_id
                                        FROM chatroom_prooms c1
                                        LEFT JOIN chatroom_settings
                                                ON chatroom_settings.room_id = c1.parent_id
                                        WHERE chatroom_settings.room_id IS NULL
                                )'
                        );
                }

                // Delete orphaned bans
                if($ilDB->getDBType() == '' || $ilDB->getDBType() == 'mysql' || $ilDB->getDBType() == 'innodb')
                {
                        $ilDB->manipulate('
                        DELETE c1
                        FROM chatroom_bans c1
                        INNER JOIN (
                                SELECT chatroom_bans.room_id
                                FROM chatroom_bans
                                LEFT JOIN chatroom_settings
                                        ON chatroom_settings.room_id = chatroom_bans.room_id
                                WHERE chatroom_settings.room_id IS NULL
                        ) c2
                        ON c2.room_id = c1.room_id');
                }
                else
                {
                        // Oracle and Postgres
                        $ilDB->manipulate(' 
                                DELETE FROM chatroom_bans
                                WHERE chatroom_bans.room_id IN (
                                        SELECT chatroom_bans.room_id
                                        FROM chatroom_bans
                                        LEFT JOIN chatroom_settings
                                                ON chatroom_settings.room_id = chatroom_bans.room_id
                                        WHERE chatroom_settings.room_id IS NULL
                                )'
                        );
                }

                // Delete orphaned history entries
                if($ilDB->getDBType() == '' || $ilDB->getDBType() == 'mysql' || $ilDB->getDBType() == 'innodb')
                {
                        $ilDB->manipulate('
                        DELETE c1
                        FROM chatroom_history c1
                        INNER JOIN (
                                SELECT chatroom_history.room_id
                                FROM chatroom_history
                                LEFT JOIN chatroom_settings
                                        ON chatroom_settings.room_id = chatroom_history.room_id
                                WHERE chatroom_settings.room_id IS NULL
                        ) c2
                        ON c2.room_id = c1.room_id');
                }
                else
                {
                        // Oracle and Postgres
                        $ilDB->manipulate(' 
                                DELETE FROM chatroom_history
                                WHERE chatroom_history.room_id IN (
                                        SELECT chatroom_history.room_id
                                        FROM chatroom_history
                                        LEFT JOIN chatroom_settings
                                                ON chatroom_settings.room_id = chatroom_history.room_id
                                        WHERE chatroom_settings.room_id IS NULL
                                )'
                        );
                }

                // Delete orphaned users
                if($ilDB->getDBType() == '' || $ilDB->getDBType() == 'mysql' || $ilDB->getDBType() == 'innodb')
                {
                        $ilDB->manipulate('
                        DELETE c1
                        FROM chatroom_users c1
                        INNER JOIN (
                                SELECT chatroom_users.room_id
                                FROM chatroom_users
                                LEFT JOIN chatroom_settings
                                        ON chatroom_settings.room_id = chatroom_users.room_id
                                WHERE chatroom_settings.room_id IS NULL
                        ) c2
                        ON c2.room_id = c1.room_id');
                }
                else
                {
                        // Oracle and Postgres
                        $ilDB->manipulate(' 
                                DELETE FROM chatroom_users
                                WHERE chatroom_users.room_id IN (
                                        SELECT chatroom_users.room_id
                                        FROM chatroom_history
                                        LEFT JOIN chatroom_settings
                                                ON chatroom_settings.room_id = chatroom_users.room_id
                                        WHERE chatroom_settings.room_id IS NULL
                                )'
                        );
                }

                // Delete orphaned sessions
                if($ilDB->getDBType() == '' || $ilDB->getDBType() == 'mysql' || $ilDB->getDBType() == 'innodb')
                {
                        $ilDB->manipulate('
                        DELETE c1
                        FROM chatroom_sessions c1
                        INNER JOIN (
                                SELECT chatroom_sessions.room_id
                                FROM chatroom_sessions
                                LEFT JOIN chatroom_settings
                                        ON chatroom_settings.room_id = chatroom_sessions.room_id
                                WHERE chatroom_settings.room_id IS NULL
                        ) c2
                        ON c2.room_id = c1.room_id');
                }
                else
                {
                        // Oracle and Postgres
                        $ilDB->manipulate(' 
                                DELETE FROM chatroom_sessions
                                WHERE chatroom_sessions.room_id IN (
                                        SELECT chatroom_sessions.room_id
                                        FROM chatroom_history
                                        LEFT JOIN chatroom_settings
                                                ON chatroom_settings.room_id = chatroom_sessions.room_id
                                        WHERE chatroom_settings.room_id IS NULL
                                )'
                        );
                }

                // Delete orphaned private sessions
                if($ilDB->getDBType() == '' || $ilDB->getDBType() == 'mysql' || $ilDB->getDBType() == 'innodb')
                {
                        $ilDB->manipulate('
                        DELETE c1
                        FROM chatroom_psessions c1
                        INNER JOIN (
                                SELECT chatroom_psessions.proom_id
                                FROM chatroom_psessions
                                LEFT JOIN chatroom_prooms
                                        ON chatroom_prooms.proom_id = chatroom_psessions.proom_id
                                WHERE chatroom_prooms.proom_id IS NULL
                        ) c2
                        ON c2.proom_id = c1.proom_id');
                }
                else
                {
                        // Oracle and Postgres
                        $ilDB->manipulate(' 
                                DELETE FROM chatroom_psessions
                                WHERE chatroom_psessions.proom_id IN (
                                        SELECT chatroom_psessions.proom_id
                                        FROM chatroom_history
                                        LEFT JOIN chatroom_prooms
                                                ON chatroom_prooms.proom_id = chatroom_psessions.proom_id
                                        WHERE chatroom_prooms.proom_id IS NULL
                                )'
                        );
                }

                // Delete orphaned private access
                if($ilDB->getDBType() == '' || $ilDB->getDBType() == 'mysql' || $ilDB->getDBType() == 'innodb')
                {
                        $ilDB->manipulate('
                        DELETE c1
                        FROM chatroom_proomaccess c1
                        INNER JOIN (
                                SELECT chatroom_proomaccess.proom_id
                                FROM chatroom_proomaccess
                                LEFT JOIN chatroom_prooms
                                        ON chatroom_prooms.proom_id = chatroom_proomaccess.proom_id
                                WHERE chatroom_prooms.proom_id IS NULL
                        ) c2
                        ON c2.proom_id = c1.proom_id');
                }
                else
                {
                        // Oracle and Postgres
                        $ilDB->manipulate(' 
                                DELETE FROM chatroom_proomaccess
                                WHERE chatroom_proomaccess.proom_id IN (
                                        SELECT chatroom_proomaccess.proom_id
                                        FROM chatroom_history
                                        LEFT JOIN chatroom_prooms
                                                ON chatroom_prooms.proom_id = chatroom_proomaccess.proom_id
                                        WHERE chatroom_prooms.proom_id IS NULL
                                )'
                        );
                }

                // Delete private room history
                if($ilDB->getDBType() == '' || $ilDB->getDBType() == 'mysql' || $ilDB->getDBType() == 'innodb')
                {
                        $ilDB->manipulate('
                        DELETE c1
                        FROM chatroom_history c1
                        INNER JOIN (
                                SELECT chatroom_history.sub_room
                                FROM chatroom_history
                                LEFT JOIN chatroom_prooms
                                        ON chatroom_prooms.proom_id = chatroom_history.sub_room
                                WHERE chatroom_prooms.proom_id IS NULL AND chatroom_history.sub_room > 0
                        ) c2
                        ON c2.sub_room = c1.sub_room');
                }
                else
                {
                        // Oracle and Postgres
                        $ilDB->manipulate(' 
                                DELETE FROM chatroom_history
                                WHERE chatroom_history.sub_room IN (
                                        SELECT chatroom_history.sub_room
                                        FROM chatroom_history
                                        LEFT JOIN chatroom_prooms
                                                ON chatroom_prooms.proom_id = chatroom_history.sub_room
                                        WHERE chatroom_prooms.proom_id IS NULL AND chatroom_history.sub_room > 0
                                )'
                        );
                }
        }
}