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<?php
namespace Bitrix\Main;
class FrameCache
{
private static $instance;
private static $isEnable = false;
private static $isBackgroundRequest = false;
private static $useAppCache = false;
private static $onBeforeHandleKey = false;
private static $onHandleKey = false;
private $arDynamicIDs = array();
private $curDynamicId = false;
public $arDynamicData = Array();
private function __construct()
{
//use self::getInstance()
}
private function __clone()
{
//you can't clone it
}
public static function getInstance()
{
if (is_null(self::$instance))
self::$instance = new FrameCache();
return self::$instance;
}
/**
* Gets ids of the dynamic blocks
* @return array
*/
public function getDynamicIDs()
{
return $this->arDynamicIDs;
}
/**
* Sets isEnable property value
* @param bool $isEnable
*/
public static function setEnable($isEnable = true)
{
if ($isEnable && !self::$isEnable)
{
self::$onBeforeHandleKey = AddEventHandler("main", "OnBeforeEndBufferContent", Array(__CLASS__, "OnBeforeEndBufferContent"));
self::$onHandleKey = AddEventHandler("main", "OnEndBufferContent", Array(__CLASS__, "OnEndBufferContent"));
self::$isEnable = true;
\CJSCore::init(Array("fc"), false);
$actionType = \Bitrix\Main\Context::getCurrent()->getServer()->get("HTTP_BX_ACTION_TYPE");
if ($actionType == "get_dynamic")//Is it the background request?
self::$isBackgroundRequest = true;
}
elseif (!$isEnable && self::$isEnable)
{
if (self::$onBeforeHandleKey >= 0)
RemoveEventHandler("main", "OnBeforeEndBufferContent", self::$onBeforeHandleKey);
if (self::$onBeforeHandleKey >= 0)
RemoveEventHandler("main", "OnEndBufferContent", self::$onHandleKey);
self::$isEnable = false;
}
}
/**
* Marks start of a dynamic block
* @param $ID
* @return bool
*/
public function startDynamicWithID($ID)
{
if (in_array($ID, $this->arDynamicIDs) && $ID == $this->curDynamicId)
return false;
self::setEnable();
$this->arDynamicIDs[] = $ID;
$this->curDynamicId = $ID;
echo "##start_frame_cache_" . $ID . "##";
return true;
}
/**
* Marks end of the dynamic block if it's the current dynamic block
* and its start was being marked early.
* @param $ID
*/
public function finishDynamicWithID($ID)
{
if ($this->curDynamicId !== $ID)
return;
$this->curDynamicId = false;
echo "##end_frame_cache_" . $ID . "##";
}
/**
* OnBeforeEndBufferContent handler
*/
public static function onBeforeEndBufferContent()
{
global $APPLICATION;
$fcache = FrameCache::getInstance();
$manifest = \Bitrix\Main\Data\AppCacheManifest::getInstance();
if (self::getUseAppCache() == true)
$appCacheParams = $manifest->OnBeforeEndBufferContent();
else
$appCacheParams = Array();
if (!self::$isBackgroundRequest)
{
$checkParams = array_merge(Array("dynamic" => $fcache->getDynamicIDs()), $appCacheParams);
$checkScript = "<script>BX.ready(function(){ BX.frameCache.vars = " . json_encode($checkParams) . ";BX.frameCache.update();})</script>";
$APPLICATION->AddHeadString($checkScript);
}
}
/**
* OnEndBufferContent handler
* @param $content
*/
public static function onEndBufferContent(&$content)
{
global $APPLICATION;
if (self::getUseAppCache() == true) //Do we use html5 application cache?
\Bitrix\Main\Data\AppCacheManifest::onEndBufferContent($content);
else
\Bitrix\Main\Data\AppCacheManifest::checkObsoleteManifest();//it checks if the manifest is still alive.
$selfObject = self::getInstance();
$ids = $selfObject->getDynamicIDs();
if (count($ids) > 0) //Do we have any dynamic blocks?
{
$match = array();
$regexp = "/##start_frame_cache_(" . implode("|", $ids) . ")##(.+?)##end_frame_cache_(?:" . implode("|", $ids) . ")##/is";
preg_match_all($regexp, $content, $match);
/*
Notes:
$match[0] - array of dynamic blocks with macros'
$match[1] - ids of the dynamic blocks
$match[2] - array of dynamic blocks
*/
$count = count($match[1]);
if (self::$isBackgroundRequest)
{
//$fcache->arDynamicData = array_combine($match[1], $match[2]);
for ($i = 0; $i < $count; $i++)
{
$selfObject->arDynamicData[] = Array("ID" => $match[1][$i], "CONTENT" => $match[2][$i], "HASH" => md5($match[2][$i]));
}
}
else
{
$replacedArray = array();
for ($i = 0; $i < $count; $i++)
{
$replacedArray[] = '<div id="bxdynamic_' . $match[1][$i] . '"></div>';
}
$content = str_replace($match[0], $replacedArray, $content);
}
}
if (self::$isBackgroundRequest) //Is it a check request?
{
header("Content-Type: application/x-javascript");
$content = Array(
"isManifestUpdated" => \Bitrix\Main\Data\AppCacheManifest::getInstance()->getIsModified(),
"dynamicBlocks" => $selfObject->arDynamicData,
);
if (!Application::getInstance()->isUtfMode())
//TODO I use it because there is no similar method in the new Bitrix Framework yet
$content = $APPLICATION->convertCharsetArray($content, SITE_CHARSET, "UTF-8");
$content = json_encode($content);
}
}
/**
* Sets useAppCache property
* @param bool $useAppCache
*/
public function setUseAppCache($useAppCache = true)
{
self::$useAppCache = $useAppCache;
}
/**
* Gets useAppCache property
* @return bool
*/
public function getUseAppCache()
{
return self::$useAppCache;
}
}