Export::uploadAction

public function uploadAction()
{
	$chunkSize = $this->getSizeTempFile();

	$isUploadStarted = ($this->uploadedPart > 0);
	if (!$isUploadStarted)
	{
		$reservedSize = round($chunkSize * ceil($this->totalItems / $this->pageSize) * 1.5);

		$this->uploadPath = $this->generateUploadDir(). $this->fileName;

		$this->findInitBucket(array(
			'fileSize' => $reservedSize,
			'fileName' => $this->uploadPath,
		));

		if ($this->checkCloudErrors())
		{
			$this->saveProgressParameters();

			if ($this->bucket->FileExists($this->uploadPath))
			{
				if(!$this->bucket->DeleteFile($this->uploadPath))
				{
					$this->addError(new Error('File exists in a cloud.'));
				}
			}
		}
	}
	else
	{
		$this->instanceBucket();

		$this->checkCloudErrors();
	}


	if (!file_exists($this->filePath))
	{
		$this->addError(new Error('Uploading file not exists.'));
	}

	if (!empty($this->getErrors()))
	{
		return AjaxJson::createError($this->errorCollection);
	}


	$isSuccess = false;

	if ($this->isExportCompleted && !$isUploadStarted)
	{
		// just only one file
		$uploadFile = array(
			'name' => $this->fileName,
			'size' => $this->fileSize,
			'type' => $this->fileType,
			'tmp_name' => $this->filePath,
		);

		if ($this->bucket->SaveFile($this->uploadPath, $uploadFile))
		{
			$this->uploadedPart ++;
			$this->uploadedSize += $chunkSize;
			$isSuccess = true;
			$this->isUploadFinished = true;
		}
		else
		{
			$this->addError(new Error('Uploading error.'));
		}
	}
	else
	{
		$uploader = new CCloudStorageUpload($this->uploadPath);
		if (!$uploader->isStarted())
		{
			if (!$uploader->Start($this->bucketId, $reservedSize, $this->fileType))
			{
				$this->addError(new Error('Start uploading error.'));

				return AjaxJson::createError($this->errorCollection);
			}
		}

		$part = $this->getContentTempFile();

		while ($uploader->hasRetries())
		{
			if ($uploader->Next($part, $this->bucket))
			{
				$this->uploadedPart ++;
				$this->uploadedSize += $chunkSize;
				$isSuccess = true;
				break;
			}
		}
		unset($part);

		// finish
		if ($isSuccess && $this->isExportCompleted)
		{
			if ($uploader->Finish())
			{
				$this->isUploadFinished = true;
			}
			else
			{
				$this->addError(new Error('FILE_UNKNOWN_ERROR'));
			}
		}
	}

	if ($isSuccess)
	{
		$this->dropTempFile();
	}

	// Save progress
	$this->saveProgressParameters();

	// continue export into temporally file
	$result = $this->preformAnswer(self::ACTION_UPLOAD);
	$result['STATUS'] = self::STATUS_PROGRESS;

	return $result;
}