<?php
/**
* @brief view_updates 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 12 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;
}
/**
* view_updates Task
*/
class _viewupdates 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()
{
$this->runUntilTimeout(function(){
try
{
$database = \IPS\Db::i()->select( 'classname, id, COUNT(*) AS count', 'core_view_updates', NULL, NULL, 20, array( 'classname', 'id' ), NULL, \IPS\Db::SELECT_FROM_WRITE_SERVER );
$redis = array();
/* Database results first */
foreach( $database as $row )
{
try
{
$this->update( $row['classname'], $row['id'], $row['count'] );
}
catch( \OutOfRangeException $e )
{
\IPS\Db::i()->delete( 'core_view_updates', array( 'classname=?', $row['classname'] ) );
}
\IPS\Db::i()->delete( 'core_view_updates', array( 'classname=? AND id=?', $row['classname'], $row['id'] ) );
}
}
catch ( \UnderflowException $e ) { }
/* Now try redis */
if ( \IPS\REDIS_ENABLED and \IPS\CACHE_METHOD == 'Redis' and \IPS\CACHE_CONFIG )
{
try
{
$redis = \IPS\Redis::i()->zRevRangeByScore( 'topic_views', '+inf', '-inf', array('withscores' => TRUE, 'limit' => array( 0, 20 ) ) );
foreach( $redis as $data => $count )
{
list( $class, $id ) = explode( '__', $data );
try
{
$this->update( $class, $id, intval( $count ) );
}
catch( \OutOfRangeException $e ) { }
\IPS\Redis::i()->zRem( 'topic_views', $data );
}
}
catch( \Exception $e ) { }
}
/* Go for another go? */
if ( count( $database ) or count( $redis ) )
{
return TRUE;
}
else
{
return FALSE;
}
});
}
/**
* Update the row
*
* @param string $class Class to update
* @param int $id ID of item
* @param int $count Count to update
* @throws \OutOfRangeException When table to update no longer exists
*/
protected function update( $class, $id, $count )
{
if ( class_exists( $class ) and in_array( 'IPS\Content\Views', class_implements( $class ) ) AND isset( $class::$databaseColumnMap['views'] ) )
{
try
{
\IPS\Db::i()->update(
$class::$databaseTable,
"`{$class::$databasePrefix}{$class::$databaseColumnMap['views']}`=`{$class::$databasePrefix}{$class::$databaseColumnMap['views']}`+{$count}",
array( "{$class::$databasePrefix}{$class::$databaseColumnId}=?", $id )
);
\IPS\Content\Search\Index::i()->updateViewCounts( $class, $id, $count );
}
catch( \IPS\Db\Exception $e )
{
/* Table to update no longer exists */
if( $e->getCode() == 1146 )
{
throw new \OutOfRangeException;
}
throw $e;
}
}
}
/**
* 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()
{
}
}