mirror of
https://github.com/venera-app/venera.git
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82 lines
2.4 KiB
Dart
82 lines
2.4 KiB
Dart
import 'dart:async' show Future, StreamController;
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import 'package:flutter/foundation.dart';
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import 'package:flutter/material.dart';
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import 'package:venera/foundation/cache_manager.dart';
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import 'package:venera/foundation/comic_source/comic_source.dart';
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import 'package:venera/foundation/consts.dart';
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import 'package:venera/network/app_dio.dart';
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import 'base_image_provider.dart';
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import 'reader_image.dart' as image_provider;
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class ReaderImageProvider
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extends BaseImageProvider<image_provider.ReaderImageProvider> {
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/// Image provider for normal image.
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const ReaderImageProvider(this.imageKey, this.sourceKey, this.cid, this.eid);
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final String imageKey;
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final String? sourceKey;
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final String cid;
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final String eid;
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@override
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Future<Uint8List> load(StreamController<ImageChunkEvent> chunkEvents) async {
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final cacheKey = "$imageKey@$sourceKey@$cid@$eid";
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final cache = await CacheManager().findCache(cacheKey);
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if (cache != null) {
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return await cache.readAsBytes();
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}
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var configs = <String, dynamic>{};
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if (sourceKey != null) {
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var comicSource = ComicSource.find(sourceKey!);
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configs = comicSource!.getImageLoadingConfig?.call(imageKey, cid, eid) ?? {};
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}
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configs['headers'] ??= {
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'user-agent': webUA,
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};
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var dio = AppDio(BaseOptions(
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headers: configs['headers'],
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method: configs['method'] ?? 'GET',
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responseType: ResponseType.stream,
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));
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var req = await dio.request<ResponseBody>(configs['url'] ?? imageKey,
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data: configs['data']);
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var stream = req.data?.stream ?? (throw "Error: Empty response body.");
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int? expectedBytes = req.data!.contentLength;
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if (expectedBytes == -1) {
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expectedBytes = null;
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}
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var buffer = <int>[];
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await for (var data in stream) {
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buffer.addAll(data);
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if (expectedBytes != null) {
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chunkEvents.add(ImageChunkEvent(
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cumulativeBytesLoaded: buffer.length,
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expectedTotalBytes: expectedBytes,
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));
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}
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}
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if(configs['onResponse'] != null) {
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buffer = configs['onResponse'](buffer);
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}
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await CacheManager().writeCache(cacheKey, buffer);
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return Uint8List.fromList(buffer);
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}
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@override
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Future<ReaderImageProvider> obtainKey(ImageConfiguration configuration) {
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return SynchronousFuture(this);
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}
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@override
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String get key => "$imageKey@$sourceKey@$cid@$eid";
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}
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