@codervisor/devlog-ai/src/exporters/json.ts

AI Chat History Extractor & Docker-based Automation - TypeScript implementation for GitHub Copilot and other AI coding assistants with automated testing capabilities

/**
 * Simple JSON exporter for AI chat data
 *
 * TypeScript implementation without complex configuration.
 */

import { writeFile, mkdir } from 'fs/promises';
import { dirname } from 'path';

export interface JSONExportOptions {
  indent?: number;
  ensureAscii?: boolean;
}

export class JSONExporter {
  private defaultOptions: JSONExportOptions = {
    indent: 2,
    ensureAscii: false,
  };

  /**
   * Export arbitrary data to JSON file
   */
  async exportData(
    data: Record<string, unknown>,
    outputPath: string,
    options?: JSONExportOptions,
  ): Promise<void> {
    const exportOptions = { ...this.defaultOptions, ...options };

    // Ensure output directory exists
    await mkdir(dirname(outputPath), { recursive: true });

    // Convert data to JSON string
    const jsonString = JSON.stringify(data, this.jsonReplacer, exportOptions.indent);

    // Write JSON file
    await writeFile(outputPath, jsonString, 'utf-8');
  }

  /**
   * Export chat data specifically
   */
  async exportChatData(
    data: Record<string, unknown>,
    outputPath: string,
    options?: JSONExportOptions,
  ): Promise<void> {
    return this.exportData(data, outputPath, options);
  }

  /**
   * Custom JSON replacer function for objects that aren't JSON serializable by default
   */
  private jsonReplacer(key: string, value: unknown): unknown {
    // Handle Date objects
    if (value instanceof Date) {
      return value.toISOString();
    }

    // Handle objects with toDict method
    if (
      value &&
      typeof value === 'object' &&
      'toDict' in value &&
      typeof (value as any).toDict === 'function'
    ) {
      return (value as any).toDict();
    }

    // Handle objects with toJSON method
    if (
      value &&
      typeof value === 'object' &&
      'toJSON' in value &&
      typeof (value as any).toJSON === 'function'
    ) {
      return (value as any).toJSON();
    }

    return value;
  }
}