From 2e14835bd971745dd07758ba403156a0996a6831 Mon Sep 17 00:00:00 2001
From: Stonegate <xijieyin@gmail.com>
Date: Sat, 2 Jan 2021 16:46:35 +0800
Subject: [PATCH] Change task mode to immunate.

---
 lib/state/download_state.dart | 17 +++++++++++------
 lib/type/episode_task.dart    |  8 ++++----
 2 files changed, 15 insertions(+), 10 deletions(-)

diff --git a/lib/state/download_state.dart b/lib/state/download_state.dart
index 232f5f4..5461043 100644
--- a/lib/state/download_state.dart
+++ b/lib/state/download_state.dart
@@ -53,8 +53,10 @@ class AutoDownloader {
 
       for (var episodeTask in _episodeTasks) {
         if (episodeTask.taskId == id) {
-          episodeTask.status = status;
-          episodeTask.progress = progress;
+          // episodeTask.status = status;
+          // episodeTask.progress = progress;
+          episodeTask =
+              episodeTask.copyWith(progress: progress, status: status);
           if (status == DownloadTaskStatus.complete) {
             _saveMediaId(episodeTask);
           } else if (status == DownloadTaskStatus.failed) {
@@ -213,8 +215,10 @@ class DownloadState extends ChangeNotifier {
 
       for (var episodeTask in _episodeTasks) {
         if (episodeTask.taskId == id) {
-          episodeTask.status = status;
-          episodeTask.progress = progress;
+          //episodeTask.status = status;
+          //episodeTask.progress = progress;
+          episodeTask =
+              episodeTask.copyWith(progress: progress, status: status);
           if (status == DownloadTaskStatus.complete) {
             _saveMediaId(episodeTask).then((value) {
               notifyListeners();
@@ -228,7 +232,7 @@ class DownloadState extends ChangeNotifier {
   }
 
   Future _saveMediaId(EpisodeTask episodeTask) async {
-    episodeTask.status = DownloadTaskStatus.complete;
+    episodeTask = episodeTask.copyWith(status: DownloadTaskStatus.complete);
     final completeTask = await FlutterDownloader.loadTasksWithRawQuery(
         query: "SELECT * FROM task WHERE task_id = '${episodeTask.taskId}'");
     var filePath =
@@ -343,7 +347,8 @@ class DownloadState extends ChangeNotifier {
 
     for (var episodeTask in _episodeTasks) {
       if (episodeTask.taskId == task.taskId) {
-        episodeTask.status = DownloadTaskStatus.undefined;
+        //episodeTask.status = DownloadTaskStatus.undefined;
+        episodeTask = episodeTask.copyWith(status: DownloadTaskStatus.undefined);
       }
       notifyListeners();
     }
diff --git a/lib/type/episode_task.dart b/lib/type/episode_task.dart
index ecd4f57..5fd0ba2 100644
--- a/lib/type/episode_task.dart
+++ b/lib/type/episode_task.dart
@@ -6,8 +6,8 @@ import 'episodebrief.dart';
 class EpisodeTask extends Equatable {
   final String taskId;
   final EpisodeBrief episode;
-  int progress;
-  DownloadTaskStatus status;
+  final int progress;
+  final DownloadTaskStatus status;
   EpisodeTask(
     this.episode,
     this.taskId, {
@@ -15,9 +15,9 @@ class EpisodeTask extends Equatable {
     this.status = DownloadTaskStatus.undefined,
   });
 
-  EpisodeTask copyWith({String taskId}) {
+  EpisodeTask copyWith({String taskId, int progress, DownloadTaskStatus status}) {
     return EpisodeTask(episode, taskId ?? this.taskId,
-        progress: progress, status: status);
+        progress: progress ?? this.progress, status: status ?? this.status);
   }
 
   @override