ExportFile::runExporting

private function runExporting(array $params): array
{
	$csvFile = new TranslateIOCsvFile($this->exportFilePath);
	$this->configureExportCsvFile($csvFile);
	$csvFile->openWrite( MainIOFileStreamOpenMode::APPEND);

	if ($this->appendSamples)
	{
		$samplesFile = new TranslateIOCsvFile($this->samplesFilePath);
		$this->configureExportCsvFile($samplesFile);
		$samplesFile->openWrite( MainIOFileStreamOpenMode::APPEND);
	}

	$currentLangId = Loc::getCurrentLang();

	$processedItemCount = 0;
	foreach ($this->data as $code => $row)
	{
		if (!empty($this->seekPhraseCode))
		{
			if ($code == $this->seekPhraseCode)
			{
				$this->seekPhraseCode = '';
			}
			continue;
		}

		$csvFile->put(array_values($row));

		if (
			$this->appendSamples
			&& !empty($row[$currentLangId])
			&& mb_strlen($row[$currentLangId]) < $this->maxSampleSourceLength
		)
		{
			$samples = $this->findSamples(
				$row[$currentLangId],
				$currentLangId,
				$this->langFilePath,
				$this->samplesCount,
				$this->samplesRestriction
			);
			foreach ($samples as $sample)
			{
				$samplesFile->put(array_values($sample));
				$this->exportedSamplesCount ++;
			}
		}

		$this->exportedPhraseCount ++;
		$processedItemCount ++;

		if ($this->instanceTimer()->hasTimeLimitReached())
		{
			$this->seekPhraseCode = $code;
			break;
		}
	}

	$this->processedItems += $processedItemCount;

	$this->exportFileSize = $csvFile->getSize();
	$csvFile->close();

	if ($this->appendSamples)
	{
		$this->samplesFileSize = $samplesFile->getSize();
		$samplesFile->close();
	}

	if ($this->instanceTimer()->hasTimeLimitReached() !== true)
	{
		$this->declareAccomplishment();
		$this->clearProgressParameters();
	}

	$result = [
		'PROCESSED_ITEMS' => $this->processedItems,
		'TOTAL_ITEMS' => $this->totalItems,
		'TOTAL_PHRASES' => $this->exportedPhraseCount,
		'TOTAL_SAMPLES' => $this->exportedSamplesCount,
	];

	if ($csvFile->hasErrors())
	{
		$errors = $csvFile->getErrors();
		foreach ($errors as $err)
		{
			if ($err->getCode() == TranslateIOCsvFile::ERROR_32K_FIELD_LENGTH)
			{
				$result['WARNING'] = Loc::getMessage('TR_EXPORT_ERROR_32K_LENGTH');
			}
			else
			{
				$this->addError($err);
			}
		}
	}

	return $result;
}