FaceId::addInternal

static function addInternal($binaryImageContent, $operation, $faceTableClass, $service = null)
{
	// save face locally
	$response = array('success' => false, 'result' => array());

	/** @var DataManager $faceTableClass */
	$addResult = $faceTableClass::add(array('ID' => null));

	if ($addResult->isSuccess())
	{
		$faceId = $addResult->getId();

		// save photo locally
		$fileId = CFile::SaveFile(array(
			'MODULE_ID' => 'faceid',
			'name' => 'face_'.$faceId.'.jpg',
			'type' => 'image/jpeg',
			'content' => $binaryImageContent
		), 'faceid');

		if (empty($fileId))
		{
			// rollback
			static::rollbackAddInternal($faceId, $faceTableClass);

			$response['result']['code'] = static::CODE_FAIL_SAVE_LOCAL_PHOTO;
		}
		else
		{
			// save photo to the cloud
			$handler = new Http;

			$params = array(
				'image' => base64_encode($binaryImageContent),
				'meta' => 'faceid:'.$faceId
			);

			if ($service !== null)
			{
				$params['service'] = $service;
			}

			$response = $handler->query($operation, $params);

			$result = array('added' => false, 'msg' => '');
			if ($response['success'])
			{
				$result = $response['result'];
			}

			// update balance
			if (isset($response['status']['balance']))
			{
				$currentBalance = (int)$response['status']['balance'];
				BitrixMainConfigOption::set('faceid', 'balance', $currentBalance);
			}

			if (empty($result['added']))
			{
				static::rollbackAddInternal($faceId, $faceTableClass, $fileId);
			}
			else
			{
				// update face with fileID and cloudID
				$faceTableClass::update($faceId, array(
					'FILE_ID' => $fileId,
					'CLOUD_FACE_ID' => $result['face_id']
				))->getId();

				$response['result']['item'] = array(
					'face_id' => $faceId,
					'file_id' => $fileId,
					'x' => $result['x'],
					'y' => $result['y'],
					'width' => $result['width'],
					'height' => $result['height']
				);

				// not to confuse with local face id
				unset($response['result']['face_id']);
			}
		}
	}
	else
	{
		$response['result']['code'] = static::CODE_FAIL;
	}

	return $response;
}