AlbumAdd::process

public function process($data = null, Timer $timer = null)
{
	$logger = new VkLogger($this->exportId);
	
	if (count($data) > VkVk::MAX_EXECUTION_ITEMS)
	{
		$data = array_slice($data, 0, VkVk::MAX_ALBUMS);
		$logger->addError('TOO_MANY_SECTIONS_TO_EXPORT');
	}

//		get STARTPOSITION for create next process step
	reset($data);
	$startPosition = current($data);
	$startPosition = $startPosition["SECTION_ID"];


//		set STATIC variables for several cycles
	if (self::$firstRunning)
	{
		self::$apiHelper = new VkApiApiHelper($this->exportId);
		self::$isAgressive = self::$vk->isAgressiveExport($this->exportId);
		self::$firstRunning = false;
	}

//		CHECK existing albums
	$vkExportedData = new VkVkExportedData($this->exportId, 'ALBUMS');
	$albumsFromVk = $vkExportedData->getData();
//		$albumsFromVk = self::$apiHelper->getALbumsFromVk($this->vkGroupId);
	$data = VkMap::checkMappingMatches($data, $albumsFromVk, $this->exportId, 'ALBUMS', self::$isAgressive);
	
	try
	{
//			UPLOAD photo
//			todo: need a photo mapping check before upload
//			todo: and maybe we need comments and likes
		$logger->addLog("Upload album photo");
		
		$photoUploader = new PhotoUploader($this->exportId, PhotoUploader::TYPE_ALBUM_PHOTO, $timer);
		$albumPhotoSaveResults = $photoUploader->upload($data);
		
//			photos UPLOAD may be FAILED on VK side. For albums - do nothing
		if(!array_key_exists('errors', $albumPhotoSaveResults))
		{
			$data = VkApiApiHelper::addResultToData($data, $albumPhotoSaveResults, "SECTION_ID");
		}

//			ADD or EDIT albums
		$logger->addLog("Add or edit albums", $data);
		$albumsData = VkApiApiHelper::extractItemsFromArray($data,
			array("SECTION_ID", "TITLE", "FLAG_EDIT", "PHOTO_VK_ID", "ALBUM_VK_ID"));
		$albumsAddEditResults = $this->executer->executeMarketAlbumAddEdit(array(
			"owner_id" => $this->vkGroupId,
			"data" => $albumsData,
			"count" => count($data),
		));
		$data = VkApiApiHelper::addResultToData($data, $albumsAddEditResults, "SECTION_ID");


//			MAPPING for success results
		$dataToMapping = array();
		foreach ($albumsAddEditResults as $item)
		{
			if (isset($item["flag_album_add_result"]) && $item["flag_album_add_result"])
				$dataToMapping[] = array(
					"value_external" => $item["ALBUM_VK_ID"],
					"value_internal" => $item["SECTION_ID"],
				);
		}
//			we don't need use timer in last operation. Timer will be checked in feed cycle.
		if (!empty($dataToMapping))
		{
			VkMap::addAlbumMapping($dataToMapping, $this->exportId);
		}


//			add saved data to CACHE to accelereate export process. Cache updated every hour (for long exports)
		if (!empty($data))
		{
			$dataToCache = VkApiApiHelper::extractItemsFromArray($data, array('ALBUM_VK_ID'));
			$dataToCache = VkApiApiHelper::changeArrayMainKey($dataToCache, 'ALBUM_VK_ID');
			$vkExportedData->addData($dataToCache);
		}

//			check timer before next step, because not-agressive export can be run very long time
		if ($timer !== null && !$timer->check())
		{
			throw new TimeIsOverException();
		}
	}
	catch (TimeIsOverException $e)
	{
		throw new TimeIsOverException("Timelimit for export is over", $startPosition);
	}
	
	return true;
}