支持在搜索框中输入 AV/BV 号直接跳转到视频

src/Desktop/BiliCopilot.UI/Toolkits/IdToolkit.cs

@@ -0,0 +1,59 @@
+// Copyright (c) Bili Copilot. All rights reserved.
+
+namespace BiliCopilot.UI.Toolkits;
+
+/// <summary>
+/// 视频 ID 工具箱.
+/// </summary>
+public static class IdToolkit
+{
+    private const long XOR_CODE = 23442827791579L;
+    private const long MASK_CODE = 2251799813685247L;
+    private const long MAX_AID = 1L << 51;
+    private const long BASE = 58L;
+
+    private const string DATA = "FcwAPNKTMug3GV5Lj7EJnHpWsx4tb8haYeviqBz6rkCy12mUSDQX9RdoZf";
+
+    /// <summary>
+    /// 将 AV 号转换为 BV 号.
+    /// </summary>
+    /// <param name="aid">AID.</param>
+    /// <returns>BVId.</returns>
+    public static string Av2Bv(long aid)
+    {
+        var bytes = new char[] { 'B', 'V', '1', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0' };
+        var bvIndex = bytes.Length - 1;
+        var tmp = (MAX_AID | aid) ^ XOR_CODE;
+
+        while (tmp > 0)
+        {
+            bytes[bvIndex] = DATA[(int)(tmp % BASE)];
+            tmp /= BASE;
+            bvIndex--;
+        }
+
+        Swap(ref bytes[3], ref bytes[9]);
+        Swap(ref bytes[4], ref bytes[7]);
+
+        return new string(bytes);
+    }
+
+    /// <summary>
+    /// 将 BV 号转换为 AV 号.
+    /// </summary>
+    /// <param name="bvid">BV Id.</param>
+    /// <returns>AVId.</returns>
+    public static long Bv2Av(string bvid)
+    {
+        var bvidArr = bvid.ToArray();
+        Swap(ref bvidArr[3], ref bvidArr[9]);
+        Swap(ref bvidArr[4], ref bvidArr[7]);
+        bvidArr = bvidArr.Skip(3).ToArray();
+
+        var tmp = bvidArr.Aggregate(0L, (pre, bvidChar) => (pre * BASE) + DATA.IndexOf(bvidChar));
+
+        return (tmp & MASK_CODE) ^ XOR_CODE;
+    }
+
+    private static void Swap(ref char a, ref char b) => (b, a) = (a, b);
+}

src/Desktop/BiliCopilot.UI/ViewModels/Items/VideoItemViewModel/VideoItemViewModel.cs

@@ -44,7 +44,7 @@ public VideoItemViewModel(
         var primaryLan = ApplicationLanguages.Languages[0];
         Style = style;
         Title = info.Identifier.Title;
-        Cover = info.Identifier.Cover.Uri;
+        Cover = info.Identifier.Cover?.Uri;
         Author = info.Publisher?.User?.Name;
         Avatar = info.Publisher?.User?.Avatar?.Uri;
         Duration = AppToolkit.FormatDuration(TimeSpan.FromSeconds(info.Duration ?? 0));

src/Desktop/BiliCopilot.UI/ViewModels/View/SearchPageViewModel/SearchPageViewModel.cs

@@ -1,9 +1,11 @@
 // Copyright (c) Bili Copilot. All rights reserved.
 
+using System.Diagnostics;
 using BiliCopilot.UI.Models.Constants;
 using BiliCopilot.UI.Pages.Overlay;
 using BiliCopilot.UI.Toolkits;
 using BiliCopilot.UI.ViewModels.Components;
+using BiliCopilot.UI.ViewModels.Core;
 using BiliCopilot.UI.ViewModels.Items;
 using CommunityToolkit.Mvvm.Input;
 using Microsoft.Extensions.Logging;
@@ -46,6 +48,34 @@ private async Task SearchAsync(string keyword)
             return;
         }
 
+        if (keyword.StartsWith("av", StringComparison.InvariantCultureIgnoreCase))
+        {
+            var videoId = keyword[2..];
+
+            // videoId should be a number.
+            if (long.TryParse(videoId, out var id))
+            {
+                this.Get<NavigationViewModel>().Back();
+                var video = new VideoInformation(new MediaIdentifier(videoId, default, default), default);
+                new VideoItemViewModel(video, VideoCardStyle.Search).PlayCommand.Execute(default);
+                return;
+            }
+        }
+        else if (keyword.StartsWith("BV"))
+        {
+            try
+            {
+                var video = new VideoInformation(new MediaIdentifier(IdToolkit.Bv2Av(keyword).ToString(), default, default), default);
+                this.Get<NavigationViewModel>().Back();
+                new VideoItemViewModel(video, VideoCardStyle.Search).PlayCommand.Execute(default);
+                return;
+            }
+            catch (Exception)
+            {
+                Debug.WriteLine("尝试解析BV号时失败.");
+            }
+        }
+
         Keyword = keyword;
         Sections = default;
         SelectedSection = default;

src/Libs/Danmaku.Core/DanmakuFrostMaster.cs

@@ -40,7 +40,7 @@ public bool DebugMode
         /// </summary>
         public DanmakuFrostMaster(Grid rootGrid, ILogger<DanmakuFrostMaster> logger = default)
         {
-            rootGrid.Children.Clear();
+            rootGrid?.Children.Clear();
             if (rootGrid.XamlRoot is null)
             {
                 return;