ExportFile::run

public function run(string $path = '', bool $runBefore = false): array
{
	if (empty($path) || !preg_match("#(.+/lang)(/?w*)#", $path, $matches))
	{
		$this->addError(new MainError(Loc::getMessage('TR_EXPORT_EMPTY_PATH_LIST')));

		return [
			'STATUS' => TranslateControllerSTATUS_COMPLETED
		];
	}
	if (!TranslateIOPath::isLangDir($path))
	{
		$this->addError(new MainError(Loc::getMessage('TR_EXPORT_FILE_NOT_LANG', ['#FILE#' => $path])));

		return [
			'STATUS' => TranslateControllerSTATUS_COMPLETED
		];
	}

	if ($runBefore)
	{
		$this->onBeforeRun();
	}

	$this->langFilePath = TranslateIOPath::replaceLangId($path, '#LANG_ID#');

	$fullPaths = [];
	foreach ($this->languages as $langId)
	{
		$langRelPath = TranslateIOPath::replaceLangId($path, $langId);
		$langFullPath = TranslateIOPath::tidy(self::$documentRoot . '/' . $langRelPath);

		if (self::$useTranslationRepository && in_array($langId, self::$translationRepositoryLanguages))
		{
			$langFullPath = MainLocalizationTranslation::convertLangPath($langFullPath, $langId);
		}

		$fullPaths[$langId] = $langFullPath;
	}

	$this->data = $this->mergeLangFiles($this->langFilePath, $fullPaths, $this->collectUntranslated);

	if ($this->isNewProcess)
	{
		$this->totalItems = (int)count($this->data);
		$this->processedItems = 0;

		if ($this->totalItems > 0)
		{
			$this->exportFileName = $this->generateExportFileName($path, $this->languages);
			$csvFile = $this->createExportTempFile($this->exportFileName);
			$this->exportFilePath = $csvFile->getPhysicalPath();
			$this->exportFileSize = $csvFile->getSize();
		}
		if ($this->appendSamples)
		{
			$this->samplesFileName = $this->generateExportFileName('samples-'.$path, $this->languages);
			$sampleFile = $this->createExportTempFile($this->samplesFileName);
			$this->samplesFilePath = $sampleFile->getPhysicalPath();
			$this->samplesFileSize = $sampleFile->getSize();
		}

		$this->saveProgressParameters();

		return [
			'STATUS' => $this->totalItems > 0
				? TranslateControllerSTATUS_PROGRESS
				: TranslateControllerSTATUS_COMPLETED,
			'PROCESSED_ITEMS' => 0,
			'TOTAL_ITEMS' => $this->totalItems,
			'TOTAL_PHRASES' => $this->exportedPhraseCount,
			'TOTAL_SAMPLES' => $this->exportedSamplesCount,
		];
	}

	return $this->performStep('runExporting', ['path' => $path]);
}