Function createTranscriptExport

lib/transcript-export.ts:270–324

(
  transcript: TranscriptSegment[],
  options: TranscriptExportOptions
)

}

export function createTranscriptExport(
  transcript: TranscriptSegment[],
  options: TranscriptExportOptions
): TranscriptExportResult {
  if (!Array.isArray(transcript) || transcript.length === 0) {
    throw new Error('Transcript is empty.');
  }

  const hasSpeakerLabels = transcript.some((segment) => Boolean(getSegmentSpeaker(segment)));
  const normalizedOptions: TranscriptExportOptions = {
    ...options,
    includeSpeakers: options.includeSpeakers && hasSpeakerLabels,
  };

  let content: string;
  let extension: string;
  let mimeType: string;

  switch (options.format) {
    case 'srt':
      content = generateSrtContent(transcript, normalizedOptions, hasSpeakerLabels);
      extension = 'srt';
      mimeType = 'text/plain;charset=utf-8';
      break;
    case 'csv':
      content = generateCsvContent(transcript, normalizedOptions, hasSpeakerLabels);
      extension = 'csv';
      mimeType = 'text/csv;charset=utf-8';
      break;
    case 'txt':
    default:
      content = generateTxtContent(transcript, normalizedOptions, hasSpeakerLabels);
      extension = 'txt';
      mimeType = 'text/plain;charset=utf-8';
  }

  const filenameParts = [DEFAULT_FILENAME];
  if (options.videoTitle) {
    filenameParts.push(
      options.videoTitle
        .toLowerCase()
        .replace(/[^a-z0-9]+/gi, '-')
        .replace(/^-+|-+$/g, '')
    );
  }

  if (options.exportMode && options.exportMode !== 'original') {
     filenameParts.push(options.exportMode);
  }

  const filename = `${filenameParts.join('-') || DEFAULT_FILENAME}.${extension}`;
  const blob = new Blob([content], { type: mimeType });

  return { blob, filename };
}

export function hasSpeakerMetadata(transcript: TranscriptSegment[]): boolean {
  return transcript.some((segment) => Boolean(getSegmentSpeaker(segment)));