完成添加下载文件跳转功能

src/UnoFileDownloader/UnoFileDownloader/UnoFileDownloader/App.cs

@@ -1,5 +1,6 @@
 using Microsoft.Extensions.DependencyInjection;
 
+using UnoFileDownloader.Business;
 using UnoFileDownloader.Utils;
 
 namespace UnoFileDownloader
@@ -76,6 +77,9 @@ protected async override void OnLaunched(LaunchActivatedEventArgs args)
                         {
                             return new DispatcherQueueProvider(MainWindow!.DispatcherQueue);
                         });
+
+                        // 下载文件管理器
+                        services.AddSingleton<DownloadFileListManager>();
                     })
                     .UseNavigation(ReactiveViewModelMappings.ViewModelMappings, RegisterRoutes)
                 );

src/UnoFileDownloader/UnoFileDownloader/UnoFileDownloader/Business/DownloadFileListManager.cs

@@ -1,12 +1,78 @@
-using System;
+using System;
 using System.Collections.Generic;
+using System.Collections.ObjectModel;
 using System.Linq;
+using System.Reflection;
 using System.Text;
+using System.Text.Json;
 using System.Threading.Tasks;
 
+using UnoFileDownloader.Utils;
+
 namespace UnoFileDownloader.Business
 {
-    internal class DownloadFileListManager
+    public class DownloadFileListManager
     {
+        public ObservableCollection<DownloadFileInfo> DownloadFileInfoList { get; } = new ObservableCollection<DownloadFileInfo>();
+
+        public async Task InitAsync()
+        {
+            var list = await ReadDownloadedFileListAsync();
+            if (list != null)
+            {
+                DownloadFileInfoList.AddRange(list);
+            }
+        }
+
+        public Task SaveAsync() => WriteDownloadedFileListToFileAsync(DownloadFileInfoList.ToList());
+
+        public async Task AddDownloadFileAsync(DownloadFileInfo downloadFileInfo)
+        {
+            DownloadFileInfoList.Add(downloadFileInfo);
+            await SaveAsync();
+        }
+
+        /// <summary>
+        /// 读取本地存储的下载列表
+        /// </summary>
+        /// <returns></returns>
+        private async Task<List<DownloadFileInfo>?> ReadDownloadedFileListAsync()
+        {
+            var file = GetStorageFilePath();
+
+            if (!File.Exists(file))
+            {
+                return null;
+            }
+
+            var text = await File.ReadAllTextAsync(file);
+
+            var downloadFileInfoList = JsonSerializer.Deserialize<List<DownloadFileInfo>>(text);
+            return downloadFileInfoList;
+        }
+
+        /// <summary>
+        /// 写入下载列表
+        /// </summary>
+        /// <param name="downloadFileInfoList"></param>
+        /// <returns></returns>
+        private async Task WriteDownloadedFileListToFileAsync(List<DownloadFileInfo> downloadFileInfoList)
+        {
+            var file = GetStorageFilePath();
+
+            var text = JsonSerializer.Serialize(downloadFileInfoList);
+
+            await File.WriteAllTextAsync(file, text);
+        }
+
+        private string GetStorageFilePath()
+        {
+            string folder = AppContext.BaseDirectory;
+            var file = Path.Join(folder, StorageFile);
+
+            return file;
+        }
+
+        private const string StorageFile = "DownloadedFileList.json";
     }
 }

src/UnoFileDownloader/UnoFileDownloader/UnoFileDownloader/Business/Models/DownloadFileInfo.cs

@@ -50,19 +50,19 @@ public string DownloadProcess
         ///     下载项被加入的时间
         /// </summary>
         /// 加入时间不可变，因此不带通知
-        public string AddedTime { get; set; } = string.Empty;
+        public string AddedTime { get; init; } = string.Empty;
 
         /// <summary>
         ///     下载链接
         /// </summary>
         /// 下载链接不可变，因此不带通知
-        public string DownloadUrl { get; set; } = string.Empty;
+        public string DownloadUrl { get; init; } = string.Empty;
 
         /// <summary>
         ///     下载的本地文件保存路径
         /// </summary>
         /// 下载的本地文件保存路径不可变，因此不带通知
-        public string FilePath { get; set; } = string.Empty;
+        public string FilePath { get; init; } = string.Empty;
 
         /// <summary>
         ///     当前下载的速度

src/UnoFileDownloader/UnoFileDownloader/UnoFileDownloader/Presentation/MainPage.xaml

@@ -16,7 +16,6 @@
       <RowDefinition Height="Auto" />
       <RowDefinition />
     </Grid.RowDefinitions>
-    <utu:NavigationBar Content="{Binding Title}" />
 
     <StackPanel Grid.Row="1"
           HorizontalAlignment="Center"
@@ -27,6 +26,11 @@
       <Button Content="Go to Second Page"
           AutomationProperties.AutomationId="SecondPageButton"
           Command="{Binding GoToSecond}" />
+      <utu:NavigationBar Content="{Binding Title}" />
+
+      <ContentControl uen:Region.Attached="true" Height="200"/>
+
     </StackPanel>
+
   </Grid>
 </Page>

src/UnoFileDownloader/UnoFileDownloader/UnoFileDownloader/Presentation/NewTaskModel.cs

@@ -4,9 +4,40 @@
 using System.Text;
 using System.Threading.Tasks;
 
+using UnoFileDownloader.Business;
+
 namespace UnoFileDownloader.Presentation
 {
-    public partial record NewTaskModel(INavigator Navigator)
+    public partial record NewTaskModel(INavigator Navigator, DownloadFileListManager DownloadFileListManager)
     {
+        public string? DownloadSource { set; get; }
+        public string? FileName { set; get; }
+
+        public async Task StartDownloadAsync()
+        {
+            if (string.IsNullOrEmpty(DownloadSource))
+            {
+                return;
+            }
+
+            var filePath = FileName;
+
+            if (string.IsNullOrEmpty(filePath))
+            {
+                filePath = Path.GetFileName(DownloadSource);
+            }
+
+            filePath = Path.GetFullPath(filePath);
+
+            await DownloadFileListManager.AddDownloadFileAsync(new DownloadFileInfo()
+            {
+                AddedTime = DateTime.Now.ToString(format:null),
+                DownloadUrl = DownloadSource,
+                FileName = Path.GetFileName(filePath),
+                FilePath = filePath,
+            });
+
+            await Navigator.NavigateViewModelAsync<MainModel>(this);
+        }
     }
 }

src/UnoFileDownloader/UnoFileDownloader/UnoFileDownloader/Presentation/NewTaskPage.xaml

@@ -6,7 +6,7 @@
     xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
     xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
     mc:Ignorable="d"
-    Background="{ThemeResource ApplicationPageBackgroundThemeBrush}">
+    Background="{ThemeResource ApplicationPageBackgroundThemeBrush}" d:DataContext="{d:DesignInstance local:BindableNewTaskModel}">
 
   <Grid>
     <Grid.RowDefinitions>
@@ -38,7 +38,8 @@
               x:Name="DownloadSourceTextBox"
               x:Uid="NewTaskPage_DownloadSourceTextBox"
               BorderThickness="1"
-              PlaceholderText="[Please input the download source here]" />
+              PlaceholderText="[Please input the download source here]"
+              Text="{Binding DownloadSource,Mode=TwoWay}"/>
             <!--<Button
               x:Uid="NewTaskPage_DownloadSourceBrowseButton"
               Grid.Column="1"
@@ -107,7 +108,8 @@
         x:Uid="NewTaskPage_DownloadButton"
         Grid.Column="0"
         HorizontalAlignment="Stretch"
-        Content="[Download]" />
+        Content="[Download]"
+        Command="{Binding StartDownloadAsync}"/>
       <Button x:Name="CancelButton"
         x:Uid="NewTaskPage_CancelButton"
         Grid.Column="2"

src/UnoFileDownloader/UnoFileDownloader/UnoFileDownloader/Presentation/ShellModel.cs

@@ -1,19 +1,23 @@
+using UnoFileDownloader.Business;
+
 namespace UnoFileDownloader.Presentation
 {
     public class ShellModel
     {
         private readonly INavigator _navigator;
+        private readonly DownloadFileListManager _downloadFileListManager;
 
-        public ShellModel(
-            INavigator navigator)
+        public ShellModel(INavigator navigator, DownloadFileListManager downloadFileListManager)
         {
             _navigator = navigator;
+            _downloadFileListManager = downloadFileListManager;
             _ = Start();
         }
 
         public async Task Start()
         {
-            await _navigator.NavigateViewModelAsync<AboutModel>(this);
+            await _downloadFileListManager.InitAsync();
+            await _navigator.NavigateViewModelAsync<NewTaskModel>(this);
         }
     }
 }