funkblubber/lib/funkblubber.dart

import 'dart:core';
import 'dart:io';
import 'package:dio/dio.dart';
import 'package:funkblubber/funkentity.dart';
import 'package:funkblubber/console.dart' as console;

Future<void> download({
  required final FunkObject object,
  required final String path,
}) async {
  console.info('Downloading');
  switch (object.kind) {
    case FunkEntity.album:
      await _downloadAlbum(object, path);
      return;

    case FunkEntity.artist:
      await _downloadArtist(object, path);
      return;

    default:
      console.info('   nothing...');
      return;
  }
}

Future<void> _downloadArtist(
  final FunkObject object,
  final String path,
) async {
  Response response = await Dio().get(
    'https://${object.domain}/api/v1/artists/${object.id}/?'
    'refresh=false',
  );

  final String pathAppend = response.data['name'];
  await Directory('$path/$pathAppend').create();
  console.info('Artist: $pathAppend');

  response = await Dio().get(
    'https://${object.domain}/api/v1/albums/?'
    'artist=${object.id}&ordering=creation_date&'
    'page=1&page_size=16&scope=all',
  );

  for (final albumResponse in response.data['results']) {
    _downloadAlbum(
      FunkObject(
        domain: object.domain,
        id: albumResponse['id'].toString(),
        kind: FunkEntity.album,
      ),
      '$path/$pathAppend',
    );
  }
}

Future<void> _downloadAlbum(
  final FunkObject object,
  final String path,
) async {
  final response = await Dio().get(
    'https://${object.domain}/api/v1/tracks/?'
    'album=${object.id}&ordering=creation_date&'
    'page=1&page_size=16&scope=all',
  );

  final String pathAppend = response.data['results'][0]['album']['title'];
  await Directory('$path/$pathAppend').create();
  console.info('Album: $pathAppend');

  for (final songResponse in response.data['results']) {
    final String songTitle = songResponse['title'];
    final String ext = songResponse['uploads'][0]['extension'];
    _downloadSongObject(
      FunkObject(
        domain: object.domain,
        id: songResponse['listen_url'],
        kind: FunkEntity.song,
      ),
      '$path/$pathAppend/$songTitle.$ext',
    );
  }
}

Future<void> _downloadSongObject(
  final FunkObject object,
  final String path,
) async {
  final Response response = await Dio().get(
    'https://${object.domain}${object.id}',
    options: Options(
      responseType: ResponseType.bytes,
      followRedirects: false,
    ),
  );
  console.info('- $path');
  final File file = File(path);
  final accessFile = file.openSync(mode: FileMode.write);
  accessFile.writeFromSync(response.data);
  await accessFile.close();
}