Deterministic file naming in video-to-transcript

gist3-workspace.ts

// Deterministic file naming in video-to-transcript
// From: https://github.com/camwest/video-to-transcript/blob/main/src/workspace.ts

/**
 * Extract a safe directory name from a YouTube URL or file path
 */
function extractProjectId(input: string): string {
  // Try to extract YouTube video ID
  const videoIdMatch = input.match(/(?:v=|\/)([\w-]{11})(?:\?|&|$)/);
  if (videoIdMatch) {
    return videoIdMatch[1];
  }
  
  // For local files, use the filename without extension
  const pathParts = input.split(/[/\\]/);
  const filename = pathParts[pathParts.length - 1];
  const nameWithoutExt = filename.replace(/\.[^.]+$/, '');
  
  // Sanitize the filename to be filesystem-safe
  return nameWithoutExt.replace(/[^a-zA-Z0-9-_]/g, '-').toLowerCase();
}