Csv::detectAction

private function detectAction($path): ExportAction
{
	// I. Based on pure file list.
	$nextAction = self::ACTION_EXPORT_FILE_LIST;
	$exporterClass = ExportFileList::class;

	// II. Based on file search.
	if (
		!empty($this->filter['FILE_NAME'])
		|| !empty($this->filter['FOLDER_NAME'])
		|| !empty($this->filter['INCLUDE_PATHS'])
		|| !empty($this->filter['EXCLUDE_PATHS'])
	)
	{
		$nextAction = self::ACTION_EXPORT_FILE_SEARCH;
		$exporterClass = ExportFileSearch::class;
	}

	// III. List of files and folders
	$pathList = $this->request->get('pathList');
	if (!empty($pathList))
	{
		$nextAction = self::ACTION_EXPORT_PATH;
		$exporterClass = ExportPath::class;
	}

	// IV. Based on phrase search.
	if (
		!empty($this->filter['PHRASE_CODE'])
		|| !empty($this->filter['INCLUDE_PHRASE_CODES'])
		|| !empty($this->filter['EXCLUDE_PHRASE_CODES'])
		|| !empty($this->filter['PHRASE_TEXT'])
	)
	{
		$nextAction = self::ACTION_EXPORT_PHRASE_SEARCH;
		$exporterClass = ExportPhraseSearch::class;

		// V. List of files with codes
		$codeList = $this->request->get('codeList');
		if (!empty($pathList) && !empty($codeList))
		{
			$nextAction = self::ACTION_EXPORT_PATH;
			$exporterClass = ExportPath::class;
		}
	}

	// VI. Single file
	if (preg_match("/.php$/", $path))
	{
		$nextAction = self::ACTION_EXPORT_FILE;
		$exporterClass = ExportFile::class;
	}


	/** @var ExportAction $action */
	$action = new $exporterClass(
		$nextAction,
		$this,
		[
			'tabId' => $this->tabId,
			'collectUntranslated' => $this->collectUntranslated,
			'appendSamples' => $this->appendSamples,
			'samplesCount' => $this->samplesCount,
			'samplesRestriction' => $this->samplesRestriction,
			'convertEncoding' => $this->convertEncoding,
			'encodingOut' => $this->encodingOut,
			'languages' => $this->languages,
			'filter' => $this->filter,
		]
	);

	return $action;
}