78 lines
2.6 KiB
Dart
78 lines
2.6 KiB
Dart
import 'dart:io';
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import 'package:dio/dio.dart';
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import 'package:file_selector/file_selector.dart';
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import 'package:flutter/services.dart';
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import 'package:path/path.dart' as p;
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import 'package:path_provider/path_provider.dart';
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import '../models/post.dart';
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class DownloadService {
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DownloadService({Dio? dio}) : _dio = dio ?? Dio();
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static const _channel = MethodChannel('rulegel/downloads');
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final Dio _dio;
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Future<String?> downloadPost(
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Post post, {
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void Function(int received, int total)? onProgress,
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}) async {
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final url = _downloadUrl(post);
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if (url == null) {
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throw StateError('No downloadable URL for this post.');
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}
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final fileName = _fileName(post, url);
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if (Platform.isAndroid) {
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final tempDir = await getTemporaryDirectory();
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final tempPath = p.join(tempDir.path, fileName);
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await _dio.download(url, tempPath, onReceiveProgress: onProgress);
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final saved = await _channel.invokeMethod<String>('saveToDownloads', {
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'path': tempPath,
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'fileName': fileName,
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'mimeType': _mimeType(fileName, post.fileType),
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});
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return saved ?? fileName;
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}
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final location = await getSaveLocation(suggestedName: fileName);
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if (location == null) return null;
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await _dio.download(url, location.path, onReceiveProgress: onProgress);
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return location.path;
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}
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String? _downloadUrl(Post post) {
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for (final url in [post.sampleUrl, post.fileUrl, post.previewUrl]) {
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if (url.trim().isNotEmpty) return url;
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}
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return null;
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}
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String _fileName(Post post, String url) {
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final parsed = Uri.tryParse(url);
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final fromUrl = parsed == null ? '' : p.basename(parsed.path);
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if (fromUrl.contains('.') && fromUrl.length > 3) return fromUrl;
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final extension = _extension(post.fileType);
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return '${post.providerId}_${post.id}$extension';
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}
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String _extension(String fileType) {
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final value = fileType.toLowerCase();
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if (value.contains('webm')) return '.webm';
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if (value.contains('mp4') || value.contains('video')) return '.mp4';
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if (value.contains('gif')) return '.gif';
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if (value.contains('png')) return '.png';
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return '.jpg';
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}
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String _mimeType(String fileName, String fileType) {
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final value = '${fileName.toLowerCase()} ${fileType.toLowerCase()}';
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if (value.contains('.webm') || value.contains('webm')) return 'video/webm';
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if (value.contains('.mp4') || value.contains('mp4')) return 'video/mp4';
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if (value.contains('.gif') || value.contains('gif')) return 'image/gif';
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if (value.contains('.png') || value.contains('png')) return 'image/png';
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return 'image/jpeg';
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}
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}
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