Function formatData

src/web-ui/src/shared/utils/logger.ts:229–263

* Format data for logging * Separates Error objects from data: JSON for regular data, stack trace appended separately

(data: unknown)

 * Separates Error objects from data: JSON for regular data, stack trace appended separately
 */
function formatData(data: unknown): string {
  if (data === undefined || data === null) return '';
  if (data instanceof Error) {
    return data.stack || data.message;
  }
  if (typeof data === 'object') {
    try {
      // Separate Error objects from regular data
      const regularData: Record<string, unknown> = {};
      const errors: string[] = [];

      for (const key of Object.keys(data as Record<string, unknown>)) {
        const value = (data as Record<string, unknown>)[key];
        if (value instanceof Error) {
          errors.push(value.stack || `${value.name}: ${value.message}`);
        } else {
          regularData[key] = value;
        }
      }

      const parts: string[] = [];
      if (Object.keys(regularData).length > 0) {
        parts.push(JSON.stringify(regularData));
      }
      if (errors.length > 0) {
        parts.push(errors.join('\n'));
      }

      return parts.join(', ');
    } catch {
      return String(data);
    }
  }
  return String(data);
}

export class Logger {
  private static instance: Logger;