<?php
/**
* @brief Background Task
* @author <a href='https://www.invisioncommunity.com'>Invision Power Services, Inc.</a>
* @copyright (c) Invision Power Services, Inc.
* @license https://www.invisioncommunity.com/legal/standards/
* @package Invision Community
* @subpackage Converter
* @since 26 July 2016
*/
namespace IPS\convert\extensions\core\Queue;
/* To prevent PHP errors (extending class does not exist) revealing path */
if ( !defined( '\IPS\SUITE_UNIQUE_KEY' ) )
{
header( ( isset( $_SERVER['SERVER_PROTOCOL'] ) ? $_SERVER['SERVER_PROTOCOL'] : 'HTTP/1.0' ) . ' 403 Forbidden' );
exit;
}
/**
* Background Task
*/
class _DeleteEmptyTopics
{
/**
* Parse data before queuing
*
* @param array $data
* @return array
*/
public function preQueueData( $data )
{
try
{
$data['count'] = \IPS\Db::i()->select( 'count(tid)', 'forums_topics' )->first();
}
catch( \Exception $e )
{
throw new \OutOfRangeException;
}
if( $data['count'] == 0 )
{
return NULL;
}
return $data;
}
/**
* Run Background Task
*
* @param mixed $data Data as it was passed to \IPS\Task::queue()
* @param int $offset Offset
* @return int|null New offset or NULL if complete
* @throws \IPS\Task\Queue\OutOfRangeException Indicates offset doesn't exist and thus task is complete
*/
public function run( $data, $offset )
{
if ( !class_exists( 'IPS\forums\Topic' ) OR !\IPS\Application::appisEnabled( 'forums' ) )
{
throw new \IPS\Task\Queue\OutOfRangeException;
}
/* If app was removed, then cancel this */
try
{
$app = \IPS\convert\App::load( $data['app'] );
}
catch( \OutOfRangeException $e )
{
throw new \IPS\Task\Queue\OutOfRangeException;
}
$last = NULL;
foreach( new \IPS\Patterns\ActiveRecordIterator( \IPS\Db::i()->select( '*', 'forums_topics', array( "tid>?", $offset ), "tid ASC", array( 0, 50 ) ), 'IPS\forums\Topic' ) AS $topic )
{
$tid = $topic->tid;
/* Is this converted content? */
try
{
/* Just checking, we don't actually need anything */
$app->checkLink( $tid, 'forums_topics' );
}
catch( \OutOfRangeException $e )
{
$last = $tid;
continue;
}
if ( $topic->isArchived() == FALSE )
{
try
{
\IPS\Db::i()->select( 'pid', 'forums_posts', array( 'topic_id=?', $topic->tid ), NULL, 1 )->first();
}
/* This topic is empty */
catch( \UnderflowException $e )
{
$topic->delete();
}
}
else
{
try
{
/* Set first post */
\IPS\forums\Topic\ArchivedPost::db()->select( 'archive_id', 'forums_archive_posts', array( "archive_topic_id=?", $topic->tid ), NULL, 1 )->first();
}
/* This topic is empty */
catch( \UnderflowException $e )
{
$topic->delete();
}
}
$last = $tid;
}
if( $last === NULL )
{
throw new \IPS\Task\Queue\OutOfRangeException;
}
return $last;
}
/**
* Get Progress
*
* @param mixed $data Data as it was passed to \IPS\Task::queue()
* @param int $offset Offset
* @return array( 'text' => 'Doing something...', 'complete' => 50 ) Text explaning task and percentage complete
*/
public function getProgress( $data, $offset )
{
return array( 'text' => \IPS\Member::loggedIn()->language()->addToStack( 'queue_deleting_empty_topics' ), 'complete' => $data['count'] ? ( round( 100 / $data['count'] * $offset, 2 ) ) : 100 );
}
}