feat: support max running tasks config (#112)

ui/flutter/assets/locales/en_US.json

@@ -24,6 +24,7 @@
   "downloadDir": "Download Directory",
   "downloadDirValid": "Please select the download directory",
   "connections": "Connections",
+  "maxRunning": "Max Running Tasks",
   "items": "@count items",
   "subscribeTracker": "Subscribe Tracker",
   "subscribeFail": "Subscribe failed, please check network or try again later",

ui/flutter/assets/locales/ru_RU.json

@@ -24,6 +24,7 @@
   "downloadDir": "Папка загрузки",
   "downloadDirValid": "Пожалуйста, выберите папку для загрузки",
   "connections": "Соединений",
+  "maxRunning": "Максимальное количество активных задач",
   "items": "@подсчет элементов",
   "subscribeTracker": "Подпись трекера",
   "subscribeFail": "Подписка не удалась, пожалуйста, проверьте сеть или повторите попытку позже",

ui/flutter/assets/locales/zh_CN.json

@@ -24,6 +24,7 @@
   "downloadDir": "下载目录",
   "downloadDirValid": "请选择下载目录",
   "connections": "连接数",
+  "maxRunning": "最大下载数",
   "items": "@count 条",
   "subscribeTracker": "订阅 Tracker",
   "subscribeFail": "订阅失败，请检查网络或稍后重试",

ui/flutter/lib/api/api.dart

@@ -73,15 +73,12 @@ Future<T> _parse<T>(
 ) async {
   try {
     var resp = await fetch();
-    if (fromJsonT != null) {
-      final result = Result<T>.fromJson(resp.data, fromJsonT);
-      if (result.code == 0) {
-        return result.data as T;
-      } else {
-        throw Exception(result);
-      }
+    fromJsonT ??= (json) => null as T;
+    final result = Result<T>.fromJson(resp.data, fromJsonT);
+    if (result.code == 0) {
+      return result.data as T;
     } else {
-      return null as T;
+      throw Exception(result);
     }
   } on DioError catch (e) {
     throw Exception(Result(code: 1000, msg: e.message));

ui/flutter/lib/api/model/downloader_config.dart

@@ -5,6 +5,7 @@ part 'downloader_config.g.dart';
 @JsonSerializable(explicitToJson: true)
 class DownloaderConfig {
   String downloadDir = '';
+  int maxRunning = 0;
   ProtocolConfig protocolConfig = ProtocolConfig();
   ExtraConfig extra = ExtraConfig();
 

ui/flutter/lib/api/model/downloader_config.g.dart

@@ -9,6 +9,7 @@ part of 'downloader_config.dart';
 DownloaderConfig _$DownloaderConfigFromJson(Map<String, dynamic> json) =>
     DownloaderConfig()
       ..downloadDir = json['downloadDir'] as String
+      ..maxRunning = json['maxRunning'] as int
       ..protocolConfig = ProtocolConfig.fromJson(
           json['protocolConfig'] as Map<String, dynamic>?)
       ..extra = ExtraConfig.fromJson(json['extra'] as Map<String, dynamic>?);
@@ -16,6 +17,7 @@ DownloaderConfig _$DownloaderConfigFromJson(Map<String, dynamic> json) =>
 Map<String, dynamic> _$DownloaderConfigToJson(DownloaderConfig instance) =>
     <String, dynamic>{
       'downloadDir': instance.downloadDir,
+      'maxRunning': instance.maxRunning,
       'protocolConfig': instance.protocolConfig.toJson(),
       'extra': instance.extra.toJson(),
     };

ui/flutter/lib/api/model/task.dart

@@ -1,12 +1,10 @@
 import 'package:json_annotation/json_annotation.dart';
 
 import 'meta.dart';
-import 'options.dart';
-import 'resource.dart';
 
 part 'task.g.dart';
 
-enum Status { ready, running, pause, error, done }
+enum Status { ready, running, pause, wait, error, done }
 
 @JsonSerializable(explicitToJson: true)
 class Task {

ui/flutter/lib/api/model/task.g.dart

@@ -28,6 +28,7 @@ const _$StatusEnumMap = {
   Status.ready: 'ready',
   Status.running: 'running',
   Status.pause: 'pause',
+  Status.wait: 'wait',
   Status.error: 'error',
   Status.done: 'done',
 };

ui/flutter/lib/app/modules/setting/views/setting_view.dart

@@ -67,11 +67,37 @@ class SettingView extends GetView<SettingController> {
         showLabel: false,
       );
     });
+    final buildMaxRunning = _buildConfigItem(
+        'maxRunning', () => downloaderCfg.value.maxRunning.toString(),
+        (Key key) {
+      final maxRunningController = TextEditingController(
+          text: downloaderCfg.value.maxRunning.toString());
+      maxRunningController.addListener(() async {
+        if (maxRunningController.text.isNotEmpty &&
+            maxRunningController.text !=
+                downloaderCfg.value.maxRunning.toString()) {
+          downloaderCfg.value.maxRunning = int.parse(maxRunningController.text);
+
+          await debounceSave();
+        }
+      });
+
+      return TextField(
+        key: key,
+        focusNode: FocusNode(),
+        controller: maxRunningController,
+        keyboardType: TextInputType.number,
+        inputFormatters: [
+          FilteringTextInputFormatter.digitsOnly,
+          _NumericalRangeFormatter(min: 1, max: 256),
+        ],
+      );
+    });
 
     // http config items start
     final httpConfig = downloaderCfg.value.protocolConfig.http;
     final buildHttpConnections = _buildConfigItem(
-        'connections'.tr, () => httpConfig.connections.toString(), (Key key) {
+        'connections', () => httpConfig.connections.toString(), (Key key) {
       final connectionsController =
           TextEditingController(text: httpConfig.connections.toString());
       connectionsController.addListener(() async {
@@ -99,7 +125,7 @@ class SettingView extends GetView<SettingController> {
     final btExtConfig = downloaderCfg.value.extra.bt;
 
     final buildBtTrackerSubscribeUrls = _buildConfigItem(
-        'subscribeTracker'.tr,
+        'subscribeTracker',
         () => 'items'.trParams(
             {'count': btExtConfig.trackerSubscribeUrls.length.toString()}),
         (Key key) {
@@ -155,7 +181,7 @@ class SettingView extends GetView<SettingController> {
       );
     });
     final buildBtTrackers = _buildConfigItem(
-        'addTracker'.tr,
+        'addTracker',
         () => 'items'
             .trParams({'count': btExtConfig.customTrackers.length.toString()}),
         (Key key) {
@@ -298,7 +324,7 @@ class SettingView extends GetView<SettingController> {
 
     // advanced config items start
     final buildApiProtocol = _buildConfigItem(
-      'protocol'.tr,
+      'protocol',
       () => startCfg.value.network == 'tcp'
           ? 'TCP ${startCfg.value.address}'
           : 'Unix',
@@ -396,7 +422,7 @@ class SettingView extends GetView<SettingController> {
         );
       },
     );
-    final buildApiToken = _buildConfigItem('apiToken'.tr,
+    final buildApiToken = _buildConfigItem('apiToken',
         () => startCfg.value.apiToken.isEmpty ? 'notSet'.tr : 'seted'.tr,
         (Key key) {
       final apiTokenController =
@@ -426,7 +452,7 @@ class SettingView extends GetView<SettingController> {
           length: 2,
           child: Scaffold(
               appBar: PreferredSize(
-                  preferredSize: Size.fromHeight(56),
+                  preferredSize: const Size.fromHeight(56),
                   child: AppBar(
                     bottom: TabBar(
                       tabs: [
@@ -448,9 +474,8 @@ class SettingView extends GetView<SettingController> {
                         Text('general'.tr),
                         Card(
                             child: Column(
-                          children: _addDivider([
-                            buildDownloadDir(),
-                          ]),
+                          children: _addDivider(
+                              [buildDownloadDir(), buildMaxRunning()]),
                         )),
                         const Text('HTTP'),
                         Card(

ui/flutter/lib/app/modules/task/controllers/task_downloading_controller.dart

@@ -3,5 +3,11 @@ import 'task_list_controller.dart';
 
 class TaskDownloadingController extends TaskListController {
   TaskDownloadingController()
-      : super([Status.ready, Status.running, Status.pause, Status.error]);
+      : super([
+          Status.ready,
+          Status.running,
+          Status.pause,
+          Status.wait,
+          Status.error
+        ]);
 }

ui/flutter/lib/app/views/views/buid_task_list_view.dart

@@ -123,14 +123,22 @@ class BuildTaskListView extends GetView {
           list.add(IconButton(
             icon: const Icon(Icons.pause),
             onPressed: () async {
-              await pauseTask(task.id);
+              try {
+                await pauseTask(task.id);
+              } catch (e) {
+                showErrorMessage(e);
+              }
             },
           ));
         } else {
           list.add(IconButton(
             icon: const Icon(Icons.play_arrow),
             onPressed: () async {
-              await continueTask(task.id);
+              try {
+                await continueTask(task.id);
+              } catch (e) {
+                showErrorMessage(e);
+              }
             },
           ));
         }
@@ -198,16 +206,14 @@ class BuildTaskListView extends GetView {
               : Icon(FaIcons.allIcons[findIcon(task.meta.res.name)]),
 
           trailing: SizedBox(
-            width: task.status == Status.done ? 80 : 180,
+            width: 180,
             child: Row(
               // crossAxisAlignment: CrossAxisAlignment.baseline,
               // textBaseline: DefaultTextStyle.of(context).style.textBaseline,
               mainAxisAlignment: MainAxisAlignment.end,
               children: [
-                task.status == Status.done
-                    ? const SizedBox.shrink()
-                    : Text("${Util.fmtByte(task.progress.speed)} / s",
-                        style: context.textTheme.titleSmall),
+                Text("${Util.fmtByte(task.progress.speed)} / s",
+                    style: context.textTheme.titleSmall),
                 ...buildActions()
               ],
             ),

ui/flutter/lib/generated/locales.g.dart

@@ -38,6 +38,7 @@ class LocaleKeys {
   static const downloadDir = 'downloadDir';
   static const downloadDirValid = 'downloadDirValid';
   static const connections = 'connections';
+  static const maxRunning = 'maxRunning';
   static const items = 'items';
   static const subscribeTracker = 'subscribeTracker';
   static const subscribeFail = 'subscribeFail';
@@ -97,6 +98,7 @@ class Locales {
     'downloadDir': 'Download Directory',
     'downloadDirValid': 'Please select the download directory',
     'connections': 'Connections',
+    'maxRunning': 'Max Running Tasks',
     'items': '@count items',
     'subscribeTracker': 'Subscribe Tracker',
     'subscribeFail':
@@ -210,6 +212,7 @@ class Locales {
     'downloadDir': 'Папка загрузки',
     'downloadDirValid': 'Пожалуйста, выберите папку для загрузки',
     'connections': 'Соединений',
+    'maxRunning': 'Максимальное количество активных задач',
     'items': '@подсчет элементов',
     'subscribeTracker': 'Подпись трекера',
     'subscribeFail':
@@ -267,6 +270,7 @@ class Locales {
     'downloadDir': '下载目录',
     'downloadDirValid': '请选择下载目录',
     'connections': '连接数',
+    'maxRunning': '最大下载数',
     'items': '@count 条',
     'subscribeTracker': '订阅 Tracker',
     'subscribeFail': '订阅失败，请检查网络或稍后重试',

ui/flutter/pubspec.yaml

@@ -65,6 +65,7 @@ dev_dependencies:
   # rules and activating additional ones.
   flutter_lints: ^2.0.0
   ffigen: ^6.1.2
+  # build json model: flutter pub run build_runner build --delete-conflicting-outputs
   build_runner: ^2.2.1
   json_serializable: ^6.3.2
   flutter_launcher_icons: