separate api calls

ui/lib/main.dart

@@ -88,7 +88,7 @@ class MyApp extends StatelessWidget {
 
     return ProviderScope(
       child: MaterialApp.router(
-        title: 'Flutter Demo',
+        title: 'Polaris',
         theme: ThemeData(
           // This is the theme of your application.
           //

ui/lib/providers/series_details.dart

@@ -1,16 +1,40 @@
+import 'dart:async';
+
 import 'package:dio/dio.dart';
 import 'package:flutter_riverpod/flutter_riverpod.dart';
-import 'package:ui/APIs.dart';
+import 'package:ui/providers/APIs.dart';
 import 'package:ui/server_response.dart';
 
-var seriesDetailsProvider = FutureProvider.family((ref, seriesId) async {
-  var resp = await Dio().get("${APIs.seriesDetailUrl}$seriesId");
-  var rsp = ServerResponse.fromJson(resp.data);
-  if (rsp.code != 0) {
-    throw rsp.message;
+var seriesDetailsProvider = AsyncNotifierProvider.autoDispose
+    .family<SeriesDetailData, SeriesDetails, String>(SeriesDetailData.new);
+
+class SeriesDetailData
+    extends AutoDisposeFamilyAsyncNotifier<SeriesDetails, String> {
+  @override
+  FutureOr<SeriesDetails> build(String arg) async {
+    var resp = await Dio().get("${APIs.seriesDetailUrl}$arg");
+    var rsp = ServerResponse.fromJson(resp.data);
+    if (rsp.code != 0) {
+      throw rsp.message;
+    }
+    return SeriesDetails.fromJson(rsp.data);
   }
-  return SeriesDetails.fromJson(rsp.data);
-});
+
+  Future<String> searchAndDownload(
+      String seriesId, int seasonNum, int episodeNum) async {
+    var resp = await Dio().post(APIs.searchAndDownloadUrl, data: {
+      "id": int.parse(seriesId),
+      "season": seasonNum,
+      "episode": episodeNum,
+    });
+    var sp = ServerResponse.fromJson(resp.data);
+    if (sp.code != 0) {
+      throw sp.message;
+    }
+    var name = (sp.data as Map<String, dynamic>)["name"];
+    return name;
+  }
+}
 
 class SeriesDetails {
   int? id;

ui/lib/providers/settings.dart

@@ -0,0 +1,191 @@
+import 'dart:async';
+
+import 'package:dio/dio.dart';
+import 'package:flutter_riverpod/flutter_riverpod.dart';
+import 'package:quiver/strings.dart';
+import 'package:ui/providers/APIs.dart';
+import 'package:ui/server_response.dart';
+
+var tmdbApiSettingProvider =
+    AsyncNotifierProvider<TmdbApiSetting, String>(TmdbApiSetting.new);
+
+var indexersProvider =
+    AsyncNotifierProvider<IndexerSetting, List<Indexer>>(IndexerSetting.new);
+
+var dwonloadClientsProvider =
+    AsyncNotifierProvider<DownloadClientSetting, List<DownloadClient>>(
+        DownloadClientSetting.new);
+
+class TmdbApiSetting extends AsyncNotifier<String> {
+  @override
+  FutureOr<String> build() async {
+    final dio = Dio();
+    var resp = await dio
+        .get(APIs.settingsUrl, queryParameters: {"key": APIs.tmdbApiKey});
+    var rrr = ServerResponse.fromJson(resp.data);
+    if (rrr.code != 0) {
+      throw rrr.message;
+    }
+    var data = rrr.data as Map<String, dynamic>;
+    var key = data[APIs.tmdbApiKey] as String;
+
+    return key;
+  }
+
+  Future<void> submitSettings(String v) async {
+    var resp = await Dio().post(APIs.settingsUrl, data: {APIs.tmdbApiKey: v});
+    var sp = ServerResponse.fromJson(resp.data as Map<String, dynamic>);
+    if (sp.code != 0) {
+      throw sp.message;
+    }
+  }
+}
+
+class IndexerSetting extends AsyncNotifier<List<Indexer>> {
+  final dio = Dio();
+
+  @override
+  FutureOr<List<Indexer>> build() async {
+    var resp = await dio.get(APIs.allIndexersUrl);
+    var sp = ServerResponse.fromJson(resp.data);
+    if (sp.code != 0) {
+      throw sp.message;
+    }
+    List<Indexer> indexers = List.empty(growable: true);
+    for (final item in sp.data as List) {
+      indexers.add(Indexer.fromJson(item));
+    }
+    return indexers;
+  }
+
+  Future<void> addIndexer(Indexer indexer) async {
+    if (isBlank(indexer.name) ||
+        isBlank(indexer.url) ||
+        isBlank(indexer.apiKey)) {
+      return;
+    }
+    var resp = await dio.post(APIs.addIndexerUrl, data: indexer.toJson());
+    var sp = ServerResponse.fromJson(resp.data);
+    if (sp.code != 0) {
+      throw sp.message;
+    }
+    ref.invalidateSelf();
+  }
+
+  Future<void> deleteIndexer(int id) async {
+    var resp = await dio.delete("${APIs.delIndexerUrl}$id");
+    var sp = ServerResponse.fromJson(resp.data);
+    if (sp.code != 0) {
+      throw sp.message;
+    }
+    ref.invalidateSelf();
+  }
+}
+
+class Indexer {
+  String? name;
+  String? url;
+  String? apiKey;
+  int? id;
+
+  Indexer({this.name, this.url, this.apiKey});
+
+  Indexer.fromJson(Map<String, dynamic> json) {
+    name = json['name'];
+    url = json['url'];
+    apiKey = json['api_key'];
+    id = json["id"];
+  }
+  Map<String, dynamic> toJson() {
+    final Map<String, dynamic> data = new Map<String, dynamic>();
+    data['name'] = this.name;
+    data['url'] = this.url;
+    data['api_key'] = this.apiKey;
+    return data;
+  }
+}
+
+class DownloadClientSetting extends AsyncNotifier<List<DownloadClient>> {
+  final dio = Dio();
+
+  @override
+  FutureOr<List<DownloadClient>> build() async {
+    var resp = await dio.get(APIs.allDownloadClientsUrl);
+    var sp = ServerResponse.fromJson(resp.data);
+    if (sp.code != 0) {
+      throw sp.message;
+    }
+    List<DownloadClient> indexers = List.empty(growable: true);
+    for (final item in sp.data as List) {
+      indexers.add(DownloadClient.fromJson(item));
+    }
+    return indexers;
+  }
+
+  Future<void> addDownloadClients(String name, String url) async {
+    if (name.isEmpty || url.isEmpty) {
+      return;
+    }
+    var dio = Dio();
+    var resp = await dio.post(APIs.addDownloadClientUrl, data: {
+      "name": name,
+      "url": url,
+    });
+    var sp = ServerResponse.fromJson(resp.data);
+    if (sp.code != 0) {
+      throw sp.message;
+    }
+    ref.invalidateSelf();
+  }
+
+  Future<void> deleteDownloadClients(int id) async {
+    var dio = Dio();
+    var resp = await dio.delete("${APIs.delDownloadClientUrl}$id");
+    var sp = ServerResponse.fromJson(resp.data);
+    if (sp.code != 0) {
+      throw sp.message;
+    }
+    ref.invalidateSelf();
+  }
+}
+
+class DownloadClient {
+  int? id;
+  bool? enable;
+  String? name;
+  String? implementation;
+  String? url;
+  bool? removeCompletedDownloads;
+  bool? removeFailedDownloads;
+
+  DownloadClient(
+      {this.id,
+      this.enable,
+      this.name,
+      this.implementation,
+      this.url,
+      this.removeCompletedDownloads,
+      this.removeFailedDownloads});
+
+  DownloadClient.fromJson(Map<String, dynamic> json) {
+    id = json['id'];
+    enable = json['enable'];
+    name = json['name'];
+    implementation = json['implementation'];
+    url = json['url'];
+    removeCompletedDownloads = json['remove_completed_downloads'];
+    removeFailedDownloads = json['remove_failed_downloads'];
+  }
+
+  Map<String, dynamic> toJson() {
+    final Map<String, dynamic> data = new Map<String, dynamic>();
+    data['id'] = this.id;
+    data['enable'] = this.enable;
+    data['name'] = this.name;
+    data['implementation'] = this.implementation;
+    data['url'] = this.url;
+    data['remove_completed_downloads'] = this.removeCompletedDownloads;
+    data['remove_failed_downloads'] = this.removeFailedDownloads;
+    return data;
+  }
+}

ui/lib/providers/welcome_data.dart

@@ -1,6 +1,6 @@
 import 'package:dio/dio.dart';
 import 'package:flutter_riverpod/flutter_riverpod.dart';
-import 'package:ui/APIs.dart';
+import 'package:ui/providers/APIs.dart';
 import 'package:ui/server_response.dart';
 
 final welcomePageDataProvider = FutureProvider((ref) async {
@@ -43,107 +43,6 @@ class TvSeries {
   }
 }
 
-var tmdbApiSettingProvider = FutureProvider(
-  (ref) async {
-    final dio = Dio();
-    var resp = await dio
-        .get(APIs.settingsUrl, queryParameters: {"key": APIs.tmdbApiKey});
-    var rrr = resp.data as Map<String, dynamic>;
-    var data = rrr["data"] as Map<String, dynamic>;
-    var key = data[APIs.tmdbApiKey] as String;
 
-    return key;
-  },
-);
 
-var indexersProvider = FutureProvider((ref) async {
-  final dio = Dio();
-  var resp = await dio.get(APIs.allIndexersUrl);
-  var sp = ServerResponse.fromJson(resp.data);
-  if (sp.code != 0) {
-    throw sp.message;
-  }
-  List<Indexer> indexers = List.empty(growable: true);
-  for (final item in sp.data as List) {
-    indexers.add(Indexer.fromJson(item));
-  }
-  return indexers;
-});
 
-class Indexer {
-  String? name;
-  String? url;
-  String? apiKey;
-  int? id;
-
-  Indexer({this.name, this.url, this.apiKey});
-
-  Indexer.fromJson(Map<String, dynamic> json) {
-    name = json['name'];
-    url = json['url'];
-    apiKey = json['api_key'];
-    id = json["id"];
-  }
-  Map<String, dynamic> toJson() {
-    final Map<String, dynamic> data = new Map<String, dynamic>();
-    data['name'] = this.name;
-    data['url'] = this.url;
-    data['api_key'] = this.apiKey;
-    return data;
-  }
-}
-
-var dwonloadClientsProvider = FutureProvider((ref) async {
-  final dio = Dio();
-  var resp = await dio.get(APIs.allDownloadClientsUrl);
-  var sp = ServerResponse.fromJson(resp.data);
-  if (sp.code != 0) {
-    throw sp.message;
-  }
-  List<DownloadClient> indexers = List.empty(growable: true);
-  for (final item in sp.data as List) {
-    indexers.add(DownloadClient.fromJson(item));
-  }
-  return indexers;
-});
-
-class DownloadClient {
-  int? id;
-  bool? enable;
-  String? name;
-  String? implementation;
-  String? url;
-  bool? removeCompletedDownloads;
-  bool? removeFailedDownloads;
-
-  DownloadClient(
-      {this.id,
-      this.enable,
-      this.name,
-      this.implementation,
-      this.url,
-      this.removeCompletedDownloads,
-      this.removeFailedDownloads});
-
-  DownloadClient.fromJson(Map<String, dynamic> json) {
-    id = json['id'];
-    enable = json['enable'];
-    name = json['name'];
-    implementation = json['implementation'];
-    url = json['url'];
-    removeCompletedDownloads = json['remove_completed_downloads'];
-    removeFailedDownloads = json['remove_failed_downloads'];
-  }
-
-  Map<String, dynamic> toJson() {
-    final Map<String, dynamic> data = new Map<String, dynamic>();
-    data['id'] = this.id;
-    data['enable'] = this.enable;
-    data['name'] = this.name;
-    data['implementation'] = this.implementation;
-    data['url'] = this.url;
-    data['remove_completed_downloads'] = this.removeCompletedDownloads;
-    data['remove_failed_downloads'] = this.removeFailedDownloads;
-    return data;
-  }
-}

ui/lib/search.dart

@@ -1,7 +1,7 @@
 import 'package:flutter/material.dart';
 import 'package:dio/dio.dart';
 import 'package:flutter_riverpod/flutter_riverpod.dart';
-import 'package:ui/APIs.dart';
+import 'package:ui/providers/APIs.dart';
 import 'package:ui/providers/welcome_data.dart';
 import 'package:ui/server_response.dart';
 import 'package:ui/utils.dart';

ui/lib/system_settings.dart

@@ -1,9 +1,6 @@
-import 'package:dio/dio.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter_riverpod/flutter_riverpod.dart';
-import 'package:ui/APIs.dart';
-import 'package:ui/providers/welcome_data.dart';
-import 'package:ui/server_response.dart';
+import 'package:ui/providers/settings.dart';
 import 'package:ui/utils.dart';
 
 class SystemSettingsPage extends ConsumerStatefulWidget {
@@ -18,139 +15,160 @@ class SystemSettingsPage extends ConsumerStatefulWidget {
 
 class _SystemSettingsPageState extends ConsumerState<SystemSettingsPage> {
   final GlobalKey _formKey = GlobalKey<FormState>();
-
-  List<dynamic> indexers = List.empty();
-
-  @override
-  void initState() {
-    super.initState();
-  }
-
+  Future<void>? _pendingTmdb;
+  Future<void>? _pendingIndexer;
+  Future<void>? _pendingDownloadClient;
   @override
   Widget build(BuildContext context) {
     var key = ref.watch(tmdbApiSettingProvider);
-
-    var tmdbSetting = key.when(
-        data: (data) => Container(
-              padding: const EdgeInsets.fromLTRB(40, 10, 40, 0),
-              child: Form(
-                key: _formKey, //设置globalKey，用于后面获取FormState
-                autovalidateMode: AutovalidateMode.onUserInteraction,
-                child: Column(
-                  children: [
-                    TextFormField(
-                      autofocus: true,
-                      initialValue: data,
-                      decoration: const InputDecoration(
-                        labelText: "TMDB Api Key",
-                        icon: Icon(Icons.key),
-                      ),
-                      //
-                      validator: (v) {
-                        return v!.trim().isNotEmpty ? null : "ApiKey 不能为空";
-                      },
-                      onSaved: (newValue) {
-                        _submitSettings(context, newValue!);
-                      },
-                    ),
-                    Center(
-                      child: Padding(
-                        padding: const EdgeInsets.only(top: 28.0),
-                        child: ElevatedButton(
-                          child: const Padding(
-                            padding: EdgeInsets.all(16.0),
-                            child: Text("保存"),
+    var tmdbSetting = FutureBuilder(
+        // We listen to the pending operation, to update the UI accordingly.
+        future: _pendingTmdb,
+        builder: (context, snapshot) {
+          return key.when(
+              data: (value) => Container(
+                    padding: const EdgeInsets.fromLTRB(40, 10, 40, 0),
+                    child: Form(
+                      key: _formKey, //设置globalKey，用于后面获取FormState
+                      autovalidateMode: AutovalidateMode.onUserInteraction,
+                      child: Column(
+                        children: [
+                          TextFormField(
+                            autofocus: true,
+                            initialValue: value,
+                            decoration: const InputDecoration(
+                              labelText: "TMDB Api Key",
+                              icon: Icon(Icons.key),
+                            ),
+                            //
+                            validator: (v) {
+                              return v!.trim().isNotEmpty
+                                  ? null
+                                  : "ApiKey 不能为空";
+                            },
+                            onSaved: (newValue) {
+                              var furture = ref
+                                  .read(tmdbApiSettingProvider.notifier)
+                                  .submitSettings(newValue!);
+                              setState(() {
+                                _pendingTmdb = furture;
+                              });
+                              if (!showError(snapshot)) {
+                                Navigator.of(context).pop();
+                              }
+                            },
                           ),
-                          onPressed: () {
-                            // 通过_formKey.currentState 获取FormState后，
-                            // 调用validate()方法校验用户名密码是否合法，校验
-                            // 通过后再提交数据。
-                            if ((_formKey.currentState as FormState)
-                                .validate()) {
-                              (_formKey.currentState as FormState).save();
-                            }
-                          },
-                        ),
+                          Center(
+                            child: Padding(
+                              padding: const EdgeInsets.only(top: 28.0),
+                              child: ElevatedButton(
+                                child: const Padding(
+                                  padding: EdgeInsets.all(16.0),
+                                  child: Text("保存"),
+                                ),
+                                onPressed: () {
+                                  // 通过_formKey.currentState 获取FormState后，
+                                  // 调用validate()方法校验用户名密码是否合法，校验
+                                  // 通过后再提交数据。
+                                  if ((_formKey.currentState as FormState)
+                                      .validate()) {
+                                    (_formKey.currentState as FormState).save();
+                                  }
+                                },
+                              ),
+                            ),
+                          )
+                        ],
                       ),
-                    )
-                  ],
-                ),
-              ),
-            ),
-        error: (err, trace) => Text("$err"),
-        loading: () => const CircularProgressIndicator());
+                    ),
+                  ),
+              error: (err, trace) => Text("$err"),
+              loading: () => const CircularProgressIndicator());
+        });
 
     var indexers = ref.watch(indexersProvider);
-    var indexerSetting = indexers.when(
-        data: (value) => GridView.builder(
-            itemCount: value.length + 1,
-            scrollDirection: Axis.vertical,
-            shrinkWrap: true,
-            gridDelegate: const SliverGridDelegateWithFixedCrossAxisCount(
-                crossAxisCount: 6),
-            itemBuilder: (context, i) {
-              if (i < value.length) {
-                var indexer = value[i];
-                return Card(
-                    margin: const EdgeInsets.all(4),
-                    clipBehavior: Clip.hardEdge,
-                    child: InkWell(
-                        //splashColor: Colors.blue.withAlpha(30),
-                        onTap: () {
-                          showIndexerDetails(context, indexer);
-                        },
-                        child: Center(child: Text(indexer.name!))));
-              }
-              return Card(
-                  margin: const EdgeInsets.all(4),
-                  clipBehavior: Clip.hardEdge,
-                  child: InkWell(
-                      //splashColor: Colors.blue.withAlpha(30),
-                      onTap: () {
-                        showIndexerDetails(context, Indexer());
-                      },
-                      child: const Center(
-                        child: Icon(Icons.add),
-                      )));
-            }),
-        error: (err, trace) => Text("$err"),
-        loading: () => const CircularProgressIndicator());
+    var indexerSetting = FutureBuilder(
+        // We listen to the pending operation, to update the UI accordingly.
+        future: _pendingIndexer,
+        builder: (context, snapshot) {
+          return indexers.when(
+              data: (value) => GridView.builder(
+                  itemCount: value.length + 1,
+                  scrollDirection: Axis.vertical,
+                  shrinkWrap: true,
+                  gridDelegate: const SliverGridDelegateWithFixedCrossAxisCount(
+                      crossAxisCount: 6),
+                  itemBuilder: (context, i) {
+                    if (i < value.length) {
+                      var indexer = value[i];
+                      return Card(
+                          margin: const EdgeInsets.all(4),
+                          clipBehavior: Clip.hardEdge,
+                          child: InkWell(
+                              //splashColor: Colors.blue.withAlpha(30),
+                              onTap: () {
+                                showIndexerDetails(snapshot, context, indexer);
+                              },
+                              child: Center(child: Text(indexer.name!))));
+                    }
+                    return Card(
+                        margin: const EdgeInsets.all(4),
+                        clipBehavior: Clip.hardEdge,
+                        child: InkWell(
+                            //splashColor: Colors.blue.withAlpha(30),
+                            onTap: () {
+                              showIndexerDetails(snapshot, context, Indexer());
+                            },
+                            child: const Center(
+                              child: Icon(Icons.add),
+                            )));
+                  }),
+              error: (err, trace) => Text("$err"),
+              loading: () => const CircularProgressIndicator());
+        });
 
     var downloadClients = ref.watch(dwonloadClientsProvider);
-    var downloadSetting = downloadClients.when(
-        data: (value) => GridView.builder(
-            itemCount: value.length + 1,
-            scrollDirection: Axis.vertical,
-            shrinkWrap: true,
-            gridDelegate: const SliverGridDelegateWithFixedCrossAxisCount(
-                crossAxisCount: 6),
-            itemBuilder: (context, i) {
-              if (i < value.length) {
-                var client = value[i];
-                return Card(
-                    margin: const EdgeInsets.all(4),
-                    clipBehavior: Clip.hardEdge,
-                    child: InkWell(
-                        //splashColor: Colors.blue.withAlpha(30),
-                        onTap: () {
-                          showDownloadClientDetails(context, client);
-                        },
-                        child: Center(child: Text(client.name!))));
-              }
-              return Card(
-                  margin: const EdgeInsets.all(4),
-                  clipBehavior: Clip.hardEdge,
-                  child: InkWell(
-                      //splashColor: Colors.blue.withAlpha(30),
-                      onTap: () {
-                        showDownloadClientDetails(context, DownloadClient());
-                      },
-                      child: const Center(
-                        child: Icon(Icons.add),
-                      )));
-            }),
-        error: (err, trace) => Text("$err"),
-        loading: () => const CircularProgressIndicator());
+    var downloadSetting = FutureBuilder(
+        // We listen to the pending operation, to update the UI accordingly.
+        future: _pendingDownloadClient,
+        builder: (context, snapshot) {
+          return downloadClients.when(
+              data: (value) => GridView.builder(
+                  itemCount: value.length + 1,
+                  scrollDirection: Axis.vertical,
+                  shrinkWrap: true,
+                  gridDelegate: const SliverGridDelegateWithFixedCrossAxisCount(
+                      crossAxisCount: 6),
+                  itemBuilder: (context, i) {
+                    if (i < value.length) {
+                      var client = value[i];
+                      return Card(
+                          margin: const EdgeInsets.all(4),
+                          clipBehavior: Clip.hardEdge,
+                          child: InkWell(
+                              //splashColor: Colors.blue.withAlpha(30),
+                              onTap: () {
+                                showDownloadClientDetails(
+                                    snapshot, context, client);
+                              },
+                              child: Center(child: Text(client.name!))));
+                    }
+                    return Card(
+                        margin: const EdgeInsets.all(4),
+                        clipBehavior: Clip.hardEdge,
+                        child: InkWell(
+                            //splashColor: Colors.blue.withAlpha(30),
+                            onTap: () {
+                              showDownloadClientDetails(
+                                  snapshot, context, DownloadClient());
+                            },
+                            child: const Center(
+                              child: Icon(Icons.add),
+                            )));
+                  }),
+              error: (err, trace) => Text("$err"),
+              loading: () => const CircularProgressIndicator());
+        });
 
     return ListView(
       children: [
@@ -179,17 +197,8 @@ class _SystemSettingsPageState extends ConsumerState<SystemSettingsPage> {
     );
   }
 
-  void _submitSettings(BuildContext context, String v) async {
-    var resp = await Dio().post(APIs.settingsUrl, data: {APIs.tmdbApiKey: v});
-    var sp = ServerResponse.fromJson(resp.data as Map<String, dynamic>);
-    if (sp.code != 0) {
-      if (context.mounted) {
-        Utils.showAlertDialog(context, sp.message);
-      }
-    }
-  }
-
-  Future<void> showIndexerDetails(BuildContext context, Indexer indexer) {
+  Future<void> showIndexerDetails(
+      AsyncSnapshot<void> snapshot, BuildContext context, Indexer indexer) {
     var nameController = TextEditingController(text: indexer.name);
     var urlController = TextEditingController(text: indexer.url);
     var apiKeyController = TextEditingController(text: indexer.apiKey);
@@ -219,9 +228,19 @@ class _SystemSettingsPageState extends ConsumerState<SystemSettingsPage> {
             ),
             actions: <Widget>[
               indexer.id == null
-                  ? Text("")
+                  ? const Text("")
                   : TextButton(
-                      onPressed: () => {deleteIndexer(context, indexer.id!)},
+                      onPressed: () {
+                        var f = ref
+                            .read(indexersProvider.notifier)
+                            .deleteIndexer(indexer.id!);
+                        setState(() {
+                          _pendingIndexer = f;
+                        });
+                        if (!showError(snapshot)) {
+                          Navigator.of(context).pop();
+                        }
+                      },
                       child: const Text('删除')),
               TextButton(
                   onPressed: () => Navigator.of(context).pop(),
@@ -229,8 +248,18 @@ class _SystemSettingsPageState extends ConsumerState<SystemSettingsPage> {
               TextButton(
                 child: const Text('确定'),
                 onPressed: () {
-                  addIndexer(context, nameController.text, urlController.text,
-                      apiKeyController.text);
+                  var f = ref.read(indexersProvider.notifier).addIndexer(
+                      Indexer(
+                          name: nameController.text,
+                          url: urlController.text,
+                          apiKey: apiKeyController.text));
+                  setState(() {
+                    _pendingIndexer = f;
+                  });
+
+                  if (!showError(snapshot)) {
+                    Navigator.of(context).pop();
+                  }
                 },
               ),
             ],
@@ -238,36 +267,7 @@ class _SystemSettingsPageState extends ConsumerState<SystemSettingsPage> {
         });
   }
 
-  void addIndexer(
-      BuildContext context, String name, String url, String apiKey) async {
-    if (name.isEmpty || url.isEmpty || apiKey.isEmpty) {
-      return;
-    }
-    var dio = Dio();
-    var resp = await dio.post(APIs.addIndexerUrl,
-        data: Indexer(name: name, url: url, apiKey: apiKey).toJson());
-    var sp = ServerResponse.fromJson(resp.data);
-    if (sp.code != 0 && context.mounted) {
-      Utils.showAlertDialog(context, sp.message);
-      return;
-    }
-    Navigator.of(context).pop();
-    ref.refresh(indexersProvider);
-  }
-
-  void deleteIndexer(BuildContext context, int id) async {
-    var dio = Dio();
-    var resp = await dio.delete("${APIs.delIndexerUrl}$id");
-    var sp = ServerResponse.fromJson(resp.data);
-    if (sp.code != 0 && context.mounted) {
-      Utils.showAlertDialog(context, sp.message);
-      return;
-    }
-    Navigator.of(context).pop();
-    ref.refresh(indexersProvider);
-  }
-
-  Future<void> showDownloadClientDetails(
+  Future<void> showDownloadClientDetails(AsyncSnapshot<void> snapshot,
       BuildContext context, DownloadClient client) {
     var nameController = TextEditingController(text: client.name);
     var urlController = TextEditingController(text: client.url);
@@ -294,10 +294,19 @@ class _SystemSettingsPageState extends ConsumerState<SystemSettingsPage> {
             ),
             actions: <Widget>[
               client.id == null
-                  ? Text("")
+                  ? const Text("")
                   : TextButton(
-                      onPressed: () =>
-                          {deleteDownloadClients(context, client.id!)},
+                      onPressed: () {
+                        var f = ref
+                            .read(dwonloadClientsProvider.notifier)
+                            .deleteDownloadClients(client.id!);
+                        setState(() {
+                          _pendingDownloadClient = f;
+                        });
+                        if (!showError(snapshot)) {
+                          Navigator.of(context).pop();
+                        }
+                      },
                       child: const Text('删除')),
               TextButton(
                   onPressed: () => Navigator.of(context).pop(),
@@ -305,8 +314,16 @@ class _SystemSettingsPageState extends ConsumerState<SystemSettingsPage> {
               TextButton(
                 child: const Text('确定'),
                 onPressed: () {
-                  addDownloadClients(
-                      context, nameController.text, urlController.text);
+                  var f = ref
+                      .read(dwonloadClientsProvider.notifier)
+                      .addDownloadClients(
+                          nameController.text, urlController.text);
+                  setState(() {
+                    _pendingDownloadClient = f;
+                  });
+                  if (!showError(snapshot)) {
+                    Navigator.of(context).pop();
+                  }
                 },
               ),
             ],
@@ -314,33 +331,13 @@ class _SystemSettingsPageState extends ConsumerState<SystemSettingsPage> {
         });
   }
 
-  void addDownloadClients(BuildContext context, String name, String url) async {
-    if (name.isEmpty || url.isEmpty) {
-      return;
+  bool showError(AsyncSnapshot<void> snapshot) {
+    final isErrored = snapshot.hasError &&
+        snapshot.connectionState != ConnectionState.waiting;
+    if (isErrored) {
+      Utils.showSnakeBar(context, "当前操作出错: ${snapshot.error}");
+      return true;
     }
-    var dio = Dio();
-    var resp = await dio.post(APIs.addDownloadClientUrl, data: {
-      "name": name,
-      "url": url,
-    });
-    var sp = ServerResponse.fromJson(resp.data);
-    if (sp.code != 0 && context.mounted) {
-      Utils.showAlertDialog(context, sp.message);
-      return;
-    }
-    Navigator.of(context).pop();
-    ref.refresh(dwonloadClientsProvider);
-  }
-
-  void deleteDownloadClients(BuildContext context, int id) async {
-    var dio = Dio();
-    var resp = await dio.delete("${APIs.delDownloadClientUrl}$id");
-    var sp = ServerResponse.fromJson(resp.data);
-    if (sp.code != 0 && context.mounted) {
-      Utils.showAlertDialog(context, sp.message);
-      return;
-    }
-    Navigator.of(context).pop();
-    ref.refresh(dwonloadClientsProvider);
+    return false;
   }
 }

ui/lib/tv_details.dart

@@ -1,9 +1,7 @@
-import 'package:dio/dio.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter_riverpod/flutter_riverpod.dart';
-import 'package:ui/APIs.dart';
+import 'package:ui/providers/APIs.dart';
 import 'package:ui/providers/series_details.dart';
-import 'package:ui/server_response.dart';
 import 'package:ui/utils.dart';
 
 class TvDetailsPage extends ConsumerStatefulWidget {
@@ -27,6 +25,7 @@ class _TvDetailsPageState extends ConsumerState<TvDetailsPage> {
   final String seriesId;
 
   _TvDetailsPageState({required this.seriesId});
+  Future<String>? _pendingFuture;
 
   @override
   void initState() {
@@ -36,113 +35,112 @@ class _TvDetailsPageState extends ConsumerState<TvDetailsPage> {
   @override
   Widget build(BuildContext context) {
     var seriesDetails = ref.watch(seriesDetailsProvider(seriesId));
-    return seriesDetails.when(
-        data: (details) {
-          Map<int, List<Widget>> m = Map();
-          for (final ep in details.episodes!) {
-            var w = Container(
-              alignment: Alignment.topLeft,
-              child: Row(
-                children: [
-                  SizedBox(
-                    width: 70,
-                    child: Text("第 ${ep.episodeNumber} 集"),
-                  ),
-                  SizedBox(
-                    width: 100,
-                    child: Opacity(
-                      opacity: 0.5,
-                      child: Text("${ep.airDate}"),
-                    ),
-                  ),
-                  Text("${ep.title}", textAlign: TextAlign.left),
-                  const Expanded(child: Text("")),
-                  IconButton(
-                      onPressed: () {
-                        _searchAndDownload(context, seriesId, ep.seasonNumber!,
-                            ep.episodeNumber!);
-                      },
-                      icon: const Icon(Icons.search))
-                ],
-              ),
-            );
-            if (m[ep.seasonNumber] == null) {
-              m[ep.seasonNumber!] = List.empty(growable: true);
-            }
-            m[ep.seasonNumber!]!.add(w);
-          }
-          List<ExpansionTile> list = List.empty(growable: true);
-          for (final k in m.keys.toList().reversed) {
-            var seasonList = ExpansionTile(
-              tilePadding: const EdgeInsets.fromLTRB(10, 0, 10, 0),
-              childrenPadding: const EdgeInsets.fromLTRB(50, 0, 50, 0),
-              initiallyExpanded: k == 0 ? false : true,
-              title: Text("第 $k 季"),
-              children: m[k]!,
-            );
-            list.add(seasonList);
-          }
-          return ListView(
-            children: [
-              Card(
-                margin: const EdgeInsets.all(4),
-                clipBehavior: Clip.hardEdge,
-                child: Row(
-                  children: <Widget>[
-                    Flexible(
-                      child: SizedBox(
-                        width: 150,
-                        height: 200,
-                        child: Image.network(
-                          APIs.tmdbImgBaseUrl + details!.posterPath!,
-                          fit: BoxFit.contain,
+    return FutureBuilder(
+        // We listen to the pending operation, to update the UI accordingly.
+        future: _pendingFuture,
+        builder: (context, snapshot) {
+          return seriesDetails.when(
+              data: (details) {
+                Map<int, List<Widget>> m = Map();
+                for (final ep in details.episodes!) {
+                  var w = Container(
+                    alignment: Alignment.topLeft,
+                    child: Row(
+                      children: [
+                        SizedBox(
+                          width: 70,
+                          child: Text("第 ${ep.episodeNumber} 集"),
                         ),
-                      ),
-                    ),
-                    Flexible(
-                      child: Column(
-                        crossAxisAlignment: CrossAxisAlignment.start,
-                        children: [
-                          Text(
-                            "${details!.name}",
-                            style: const TextStyle(
-                                fontSize: 14, fontWeight: FontWeight.bold),
+                        SizedBox(
+                          width: 100,
+                          child: Opacity(
+                            opacity: 0.5,
+                            child: Text("${ep.airDate}"),
+                          ),
+                        ),
+                        Text("${ep.title}", textAlign: TextAlign.left),
+                        const Expanded(child: Text("")),
+                        IconButton(
+                            onPressed: () async {
+                              var f = ref
+                                  .read(
+                                      seriesDetailsProvider(seriesId).notifier)
+                                  .searchAndDownload(seriesId, ep.seasonNumber!,
+                                      ep.episodeNumber!);
+                              setState(() {
+                                _pendingFuture = f;
+                              });
+                              if (!Utils.showError(context, snapshot)) {
+                                var name = await f;
+                                Utils.showSnakeBar(
+                                    context, "开始下载: $name");
+                              }
+                            },
+                            icon: const Icon(Icons.search))
+                      ],
+                    ),
+                  );
+                  if (m[ep.seasonNumber] == null) {
+                    m[ep.seasonNumber!] = List.empty(growable: true);
+                  }
+                  m[ep.seasonNumber!]!.add(w);
+                }
+                List<ExpansionTile> list = List.empty(growable: true);
+                for (final k in m.keys.toList().reversed) {
+                  var seasonList = ExpansionTile(
+                    tilePadding: const EdgeInsets.fromLTRB(10, 0, 10, 0),
+                    childrenPadding: const EdgeInsets.fromLTRB(50, 0, 50, 0),
+                    initiallyExpanded: k == 0 ? false : true,
+                    title: Text("第 $k 季"),
+                    children: m[k]!,
+                  );
+                  list.add(seasonList);
+                }
+                return ListView(
+                  children: [
+                    Card(
+                      margin: const EdgeInsets.all(4),
+                      clipBehavior: Clip.hardEdge,
+                      child: Row(
+                        children: <Widget>[
+                          Flexible(
+                            child: SizedBox(
+                              width: 150,
+                              height: 200,
+                              child: Image.network(
+                                APIs.tmdbImgBaseUrl + details!.posterPath!,
+                                fit: BoxFit.contain,
+                              ),
+                            ),
+                          ),
+                          Flexible(
+                            child: Column(
+                              crossAxisAlignment: CrossAxisAlignment.start,
+                              children: [
+                                Text(
+                                  "${details!.name}",
+                                  style: const TextStyle(
+                                      fontSize: 14,
+                                      fontWeight: FontWeight.bold),
+                                ),
+                                const Text(""),
+                                Text(details!.overview!)
+                              ],
+                            ),
                           ),
-                          const Text(""),
-                          Text(details!.overview!)
                         ],
                       ),
                     ),
+                    Column(
+                      children: list,
+                    ),
                   ],
-                ),
-              ),
-              Column(
-                children: list,
-              ),
-            ],
-          );
-        },
-        error: (err, trace) {
-          return Text("$err");
-        },
-        loading: () => const CircularProgressIndicator());
-  }
-
-  void _searchAndDownload(BuildContext context, String seriesId, int seasonNum,
-      int episodeNum) async {
-    var resp = await Dio().post(APIs.searchAndDownloadUrl, data: {
-      "id": int.parse(seriesId),
-      "season": seasonNum,
-      "episode": episodeNum,
-    });
-    var sp = ServerResponse.fromJson(resp.data);
-    if (sp.code != 0 && context.mounted) {
-      Utils.showAlertDialog(context, sp.message);
-      return;
-    }
-    var name = (sp.data as Map<String, dynamic>)["name"];
-    if (context.mounted) {
-      Utils.showSnakeBar(context, "$name 开始下载...");
-    }
+                );
+              },
+              error: (err, trace) {
+                return Text("$err");
+              },
+              loading: () => const CircularProgressIndicator());
+        });
   }
 }

ui/lib/utils.dart

@@ -31,4 +31,14 @@ class Utils {
   static showSnakeBar(BuildContext context, String msg) {
     ScaffoldMessenger.of(context).showSnackBar(SnackBar(content: Text(msg)));
   }
+
+  static bool showError(BuildContext context, AsyncSnapshot snapshot) {
+    final isErrored = snapshot.hasError &&
+        snapshot.connectionState != ConnectionState.waiting;
+    if (isErrored) {
+      Utils.showSnakeBar(context, "当前操作出错: ${snapshot.error}");
+      return true;
+    }
+    return false;
+  }
 }

ui/lib/weclome.dart

@@ -1,7 +1,7 @@
 import 'package:flutter/material.dart';
 import 'package:flutter_riverpod/flutter_riverpod.dart';
 import 'package:go_router/go_router.dart';
-import 'package:ui/APIs.dart';
+import 'package:ui/providers/APIs.dart';
 import 'package:ui/providers/welcome_data.dart';
 import 'package:ui/tv_details.dart';
 

ui/pubspec.lock

@@ -184,6 +184,14 @@ packages:
       url: "https://pub.flutter-io.cn"
     source: hosted
     version: "1.9.0"
+  quiver:
+    dependency: "direct main"
+    description:
+      name: quiver
+      sha256: b1c1ac5ce6688d77f65f3375a9abb9319b3cb32486bdc7a1e0fdf004d7ba4e47
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "3.2.1"
   riverpod:
     dependency: transitive
     description:

ui/pubspec.yaml

@@ -38,6 +38,7 @@ dependencies:
   cupertino_icons: ^1.0.6
   go_router: ^14.2.0
   flutter_riverpod: ^2.5.1
+  quiver: ^3.2.1
 
 dev_dependencies:
   flutter_test: