Function getTranscriptFormatStats

lib/transcript-format-detector.ts:118–146

(transcript: TranscriptSegment[])

 * Gets statistics about a transcript format for debugging/monitoring
 */
export function getTranscriptFormatStats(transcript: TranscriptSegment[]) {
  if (!transcript || transcript.length === 0) {
    return {
      segmentCount: 0,
      avgTextLength: 0,
      sentenceEndingRatio: 0,
      format: 'unknown' as const
    };
  }

  const sampleSize = Math.min(100, transcript.length);
  const sample = transcript.slice(0, sampleSize);

  const totalTextLength = sample.reduce((sum, seg) => sum + (seg.text?.length || 0), 0);
  const avgTextLength = totalTextLength / sampleSize;

  const sentenceEndingRegex = /[.!?\u3002\uff01\uff1f\u203c\u2047\u2048]\s*$/;
  const sentenceEndingCount = sample.filter(seg =>
    sentenceEndingRegex.test(seg.text?.trim() || '')
  ).length;
  const sentenceEndingRatio = sentenceEndingCount / sampleSize;

  return {
    segmentCount: transcript.length,
    avgTextLength: Math.round(avgTextLength * 10) / 10,
    sentenceEndingRatio: Math.round(sentenceEndingRatio * 100) / 100,
    format: detectTranscriptFormat(transcript)
  };
}