/*
 * Copyright (C) SapphireCode - All Rights Reserved
 * This file is part of Snippeteer which is released under BSD-3-Clause.
 * See file 'LICENSE' for full license details.
 * Created by Timo Hocker <timo@scode.ovh>, May 2020
 */

/* eslint-disable no-await-in-loop */
import path from 'path';
import fs from 'fs-extra';

export class FileMapper {
  public static async map_all_files (
    folder: string,
    mutator: Function,
    args: Array<unknown> = []
  ): Promise<void> {
    const files = await fs.readdir (folder);
    for (const file of files) {
      if ([ 'node_modules' ].includes (file))
        continue;
      const abs_path = path.join (folder, file);
      if ((await fs.stat (abs_path)).isDirectory ()) {
        await FileMapper.map_all_files (abs_path, mutator, args);
        continue;
      }
      const data = await fs.readFile (abs_path, 'utf-8');
      const res = mutator (data, file, args);
      if (res === null)
        continue;
      await fs.writeFile (abs_path, res, 'utf-8');
    }
  }
}