feat(flutter): 接入分类记录收藏与下载授权
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Zhou Weidong committed
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@@ -0,0 +1,82 @@
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// Author: fruit.com.cn
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import 'package:flutter/foundation.dart';
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import '../models/content_category.dart';
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import '../models/drama.dart';
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import '../models/home_feed.dart';
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import '../repositories/category_repository.dart';
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/// 发现页分类状态：服务端分类清单、发现 feed 与当前筛选。
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class CategoryController extends ChangeNotifier {
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CategoryController(this._repository);
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static const String allCode = 'all';
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static const String hotCode = 'hot';
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static const String newCode = 'new';
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final CategoryRepository _repository;
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List<ContentCategory> categories = const [];
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HomeFeed feed = const HomeFeed();
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String selectedCode = allCode;
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bool loading = false;
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String? error;
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bool _disposed = false;
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/// 当前筛选对应的分区 code；全部分类为空字符串语义。
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bool get selectedSectionMissing =>
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selectedCode != allCode && _selectedSection == null;
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/// 当前筛选应展示的剧集；全部分类按 feed 顺序去重。
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List<Drama> get visibleDramas {
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if (selectedCode == allCode) return feed.dramas;
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return _selectedSection?.dramas ?? const [];
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}
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FeedSection? get _selectedSection {
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for (final section in feed.sections) {
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if (section.code == selectedCode) return section;
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}
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return null;
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}
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/// 加载分类与发现 feed；失败保留可重试错误态。
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Future<void> load() async {
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loading = true;
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error = null;
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_notify();
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try {
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final results = await Future.wait<Object>([
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_repository.fetchCategories(),
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_repository.fetchDiscoverFeed(),
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]);
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categories = results[0] as List<ContentCategory>;
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feed = results[1] as HomeFeed;
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} catch (_) {
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error = 'categoriesError';
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} finally {
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loading = false;
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_notify();
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}
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}
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/// 选择服务端分类，内容只匹配 `category-{id}`。
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void selectCategory(String id) => selectCode('category-$id');
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/// 选择内置或分区 code。
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void selectCode(String code) {
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selectedCode = code;
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_notify();
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}
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void _notify() {
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if (!_disposed) notifyListeners();
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}
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@override
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void dispose() {
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_disposed = true;
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super.dispose();
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}
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}
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@@ -0,0 +1,168 @@
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// Author: fruit.com.cn
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import 'package:flutter/foundation.dart';
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import '../models/download_license.dart';
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import '../models/download_policy.dart';
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import '../remote/api_exception.dart';
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import '../repositories/download_repository.dart';
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/// 一次下载授权申请的结果；后端业务拒绝时保留原始 message。
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class DownloadActionResult {
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const DownloadActionResult({required this.ok, this.license, this.message});
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final bool ok;
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final DownloadLicense? license;
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final String? message;
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}
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/// 下载授权与策略状态。
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class DownloadController extends ChangeNotifier {
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DownloadController(this._repository);
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final DownloadRepository _repository;
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DownloadPolicy? policy;
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List<DownloadLicense> licenses = const [];
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bool loading = false;
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bool clearing = false;
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String? error;
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String? actionError;
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bool _disposed = false;
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/// 同时拉取策略与当前设备授权列表。
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Future<void> load() async {
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loading = true;
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error = null;
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_notify();
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try {
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final results = await Future.wait<Object>([
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_repository.fetchPolicy(),
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_repository.list(),
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]);
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policy = results[0] as DownloadPolicy;
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licenses = results[1] as List<DownloadLicense>;
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} catch (_) {
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error = 'downloadsError';
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} finally {
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loading = false;
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_notify();
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}
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}
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/// 申请授权；付费、未解锁、配额满等判定完全以后端 message 为准。
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Future<DownloadActionResult> grant(
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String episodeId, {
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String? quality,
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}) async {
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try {
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final license = await _repository.grant(episodeId, quality: quality);
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licenses = [
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license,
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for (final item in licenses)
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if (item.episodeId != license.episodeId) item,
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];
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actionError = null;
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_notify();
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return DownloadActionResult(ok: true, license: license);
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} on ApiException catch (exception) {
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actionError = exception.message;
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_notify();
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return DownloadActionResult(ok: false, message: exception.message);
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} catch (_) {
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actionError = 'downloadGrantFailed';
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_notify();
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return const DownloadActionResult(ok: false);
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}
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}
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/// 更新设置，先本地展示，失败恢复服务端旧值。
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Future<bool> updateSettings({bool? wifiOnly, String? maxQuality}) async {
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final previous = policy;
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if (previous != null) {
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policy = previous.copyWith(wifiOnly: wifiOnly, maxQuality: maxQuality);
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_notify();
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}
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try {
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await _repository.updateSettings(
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wifiOnly: wifiOnly,
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maxQuality: maxQuality,
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);
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actionError = null;
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return true;
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} catch (_) {
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policy = previous;
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actionError = 'downloadSettingsFailed';
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return false;
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} finally {
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_notify();
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}
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}
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/// 删除单条授权，失败按原位置恢复。
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Future<bool> remove(String episodeId) async {
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final index = licenses.indexWhere((item) => item.episodeId == episodeId);
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if (index < 0) return true;
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final removed = licenses[index];
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licenses = [...licenses]..removeAt(index);
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actionError = null;
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_notify();
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try {
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await _repository.remove(episodeId);
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return true;
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} catch (_) {
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final restored = [...licenses];
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restored.insert(
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index > restored.length ? restored.length : index,
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removed,
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);
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licenses = restored;
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actionError = 'downloadDeleteFailed';
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return false;
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} finally {
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_notify();
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}
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}
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/// 清空授权，失败恢复原列表。
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Future<bool> clear() async {
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if (licenses.isEmpty) return true;
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final previous = licenses;
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licenses = const [];
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clearing = true;
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actionError = null;
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_notify();
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try {
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await _repository.clear();
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return true;
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} catch (_) {
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licenses = previous;
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actionError = 'downloadClearFailed';
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return false;
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} finally {
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clearing = false;
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_notify();
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}
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}
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/// 退出登录时清空账号相关状态，避免跨账号串联。
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void reset() {
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policy = null;
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licenses = const [];
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loading = false;
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clearing = false;
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error = null;
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actionError = null;
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_notify();
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}
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void _notify() {
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if (!_disposed) notifyListeners();
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}
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@override
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void dispose() {
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_disposed = true;
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super.dispose();
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}
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}
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@@ -88,24 +88,23 @@ class FavoriteController extends ChangeNotifier {
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/// 取消收藏（"我的"页列表里删除某条）。
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Future<bool> remove(String dramaId) async {
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final removed = cards.firstWhere(
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(drama) => drama.id == dramaId,
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orElse: () => const Drama(
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id: '',
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title: '',
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synopsis: '',
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posterUrl: '',
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),
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);
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final hadCard = removed.id.isNotEmpty;
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final index = cards.indexWhere((drama) => drama.id == dramaId);
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if (index < 0) return true;
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final removed = cards[index];
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_saved.remove(dramaId);
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cards = cards.where((drama) => drama.id != dramaId).toList();
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final next = [...cards]..removeAt(index);
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cards = next;
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notify();
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try {
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await _repository.remove(dramaId);
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return true;
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} catch (_) {
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if (hadCard) cards = [...cards, removed];
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final restored = [...cards];
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restored.insert(
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index > restored.length ? restored.length : index,
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removed,
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);
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cards = restored;
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_saved.add(dramaId);
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notify();
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return false;
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@@ -0,0 +1,205 @@
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// Author: fruit.com.cn
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import 'package:flutter/foundation.dart';
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import '../models/drama.dart';
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import '../models/watch_progress.dart';
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import '../models/watch_record.dart';
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import '../repositories/catalog_repository.dart';
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import '../repositories/watch_history_repository.dart';
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/// 独立观看记录页状态。
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///
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/// 最近记录只下发 dramaId；详情按 dramaId 去重后补取，并以 4 个并发为上限。
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class WatchRecordsController extends ChangeNotifier {
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factory WatchRecordsController({
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required WatchHistoryRepository history,
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required CatalogRepository catalog,
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int limit = defaultLimit,
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}) => WatchRecordsController._(history, catalog, limit);
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WatchRecordsController._(this._history, this._catalog, this.limit);
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static const int defaultLimit = 20;
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static const int detailConcurrency = 4;
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final WatchHistoryRepository _history;
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final CatalogRepository _catalog;
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final int limit;
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final Map<String, Drama> _detailCache = {};
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List<WatchRecord> records = const [];
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bool loading = false;
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bool clearing = false;
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String? error;
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String? actionError;
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bool _disposed = false;
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/// 加载最近记录并补齐详情；单条详情失败不拖垮整页。
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Future<void> load() async {
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loading = true;
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error = null;
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actionError = null;
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_notify();
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try {
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final recent = await _history.recent(limit: limit);
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if (_disposed) return;
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records = _uniqueRecords(recent);
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_notify();
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await _hydrate(records.map((record) => record.dramaId).toList());
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} catch (_) {
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if (!_disposed) error = 'progressError';
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} finally {
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if (!_disposed) {
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loading = false;
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_notify();
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}
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}
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}
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/// 只重试一条详情失败记录。
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Future<void> retryDetail(String dramaId) async {
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final index = _recordIndex(dramaId);
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if (index < 0) return;
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_replaceAt(
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index,
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records[index].copyWith(detailLoading: true, detailFailed: false),
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);
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_notify();
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await _loadDetail(dramaId);
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_notify();
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}
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/// 删除单条记录，先更新 UI，失败按原位置回滚。
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Future<bool> remove(String dramaId) async {
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final index = _recordIndex(dramaId);
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if (index < 0) return true;
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final removed = records[index];
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records = [...records]..removeAt(index);
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actionError = null;
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_notify();
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try {
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await _history.remove(dramaId);
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return true;
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} catch (_) {
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final next = [...records];
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next.insert(index > next.length ? next.length : index, removed);
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records = next;
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actionError = 'recordDeleteFailed';
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return false;
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} finally {
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_notify();
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}
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}
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/// 清空全部记录，先更新 UI，失败恢复原列表。
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Future<bool> clear() async {
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if (records.isEmpty) return true;
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final previous = records;
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records = const [];
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clearing = true;
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actionError = null;
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_notify();
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try {
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await _history.clear();
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return true;
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} catch (_) {
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records = previous;
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actionError = 'recordClearFailed';
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return false;
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} finally {
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clearing = false;
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_notify();
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}
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}
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List<WatchRecord> _uniqueRecords(List<WatchProgress> recent) {
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final seen = <String>{};
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return [
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for (final progress in recent)
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if (seen.add(progress.dramaId)) WatchRecord(progress: progress),
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];
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}
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Future<void> _hydrate(List<String> dramaIds) async {
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final queue = [
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for (final id in dramaIds)
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if (!_detailCache.containsKey(id)) id,
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];
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final workerCount = queue.length < detailConcurrency
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? queue.length
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: detailConcurrency;
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Future<void> worker() async {
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while (queue.isNotEmpty && !_disposed) {
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await _loadDetail(queue.removeAt(0));
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}
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}
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await Future.wait([
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for (var index = 0; index < workerCount; index++) worker(),
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]);
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}
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Future<void> _loadDetail(String dramaId) async {
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final index = _recordIndex(dramaId);
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if (index < 0) return;
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final cached = _detailCache[dramaId];
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if (cached != null) {
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_replaceAt(
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index,
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records[index].copyWith(
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drama: cached,
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detailLoading: false,
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detailFailed: false,
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),
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);
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return;
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}
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try {
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final detail = await _catalog.fetchDrama(dramaId);
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if (_disposed) return;
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_detailCache[dramaId] = detail;
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final current = _recordIndex(dramaId);
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if (current < 0) return;
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_replaceAt(
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current,
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records[current].copyWith(
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drama: detail,
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detailLoading: false,
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detailFailed: false,
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),
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);
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} catch (_) {
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if (_disposed) return;
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final current = _recordIndex(dramaId);
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if (current < 0) return;
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_replaceAt(
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current,
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records[current].copyWith(detailLoading: false, detailFailed: true),
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);
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}
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}
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int _recordIndex(String dramaId) {
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for (var index = 0; index < records.length; index++) {
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if (records[index].dramaId == dramaId) return index;
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}
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return -1;
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}
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void _replaceAt(int index, WatchRecord record) {
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final next = [...records];
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next[index] = record;
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records = next;
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}
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void _notify() {
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if (!_disposed) notifyListeners();
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}
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@override
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void dispose() {
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_disposed = true;
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super.dispose();
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}
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}
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Reference in new issue
Block a user