<?php
/**
* @brief imageproxy 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
* @since 20 Nov 2015
*/
namespace IPS\core\tasks;
/* 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;
}
/**
* imageproxy Task
*/
class _imageproxy extends \IPS\Task
{
/**
* Execute
*
* If ran successfully, should return anything worth logging. Only log something
* worth mentioning (don't log "task ran successfully"). Return NULL (actual NULL, not '' or 0) to not log (which will be most cases).
* If an error occurs which means the task could not finish running, throw an \IPS\Task\Exception - do not log an error as a normal log.
* Tasks should execute within the time of a normal HTTP request.
*
* @return mixed Message to log or NULL
* @throws \IPS\Task\Exception
*/
public function execute()
{
if ( !\IPS\Settings::i()->remote_image_proxy or !\IPS\Settings::i()->image_proxy_cache_period )
{
\IPS\Db::i()->update( 'core_tasks', array( 'enabled' => 0 ), array( '`key`=?', 'imageproxy' ) );
return NULL;
}
$this->runUntilTimeout(function()
{
$select = \IPS\Db::i()->select( 'location', 'core_image_proxy', array( 'cache_time<?', \IPS\DateTime::create()->sub( new \DateInterval( 'P' . \IPS\Settings::i()->image_proxy_cache_period . 'D' ) )->getTimestamp() ), 'cache_time ASC', 10 );
if ( !$select->count() )
{
return FALSE;
}
foreach ( $select as $location )
{
try
{
\IPS\File::get( 'core_Imageproxycache', $location )->delete();
}
catch ( \Exception $e ) { }
\IPS\Db::i()->delete( 'core_image_proxy', array( 'location=?', $location ) );
}
return TRUE;
});
}
/**
* Cleanup
*
* If your task takes longer than 15 minutes to run, this method
* will be called before execute(). Use it to clean up anything which
* may not have been done
*
* @return void
*/
public function cleanup()
{
}
}