文件名标签增加BV号 bvid nilaoda#506

BBDown.Core/Entity/Entity.cs

@@ -1,4 +1,5 @@
-using System.Diagnostics.CodeAnalysis;
+using BBDown.Core.Util;
+using System.Diagnostics.CodeAnalysis;
 
 namespace BBDown.Core.Entity
 {
@@ -17,6 +18,10 @@ public class Page
             public string? desc;
             public string? ownerName;
             public string? ownerMid;
+            public string bvid
+            {
+                get => BilibiliBvConverter.Encode(long.Parse(aid));
+            }
             public List<ViewPoint> points = new();
 
             [SetsRequiredMembers]

BBDown.Core/Util/BilibiliBvConverter.cs

@@ -0,0 +1,48 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace BBDown.Core.Util
+{
+    //code from: https://www.zhihu.com/question/381784377/answer/1099438784
+    internal class BilibiliBvConverter
+    {
+        private static string table = "fZodR9XQDSUm21yCkr6zBqiveYah8bt4xsWpHnJE7jL5VG3guMTKNPAwcF";
+        private static Dictionary<char, long> tr = new Dictionary<char, long>();
+
+        static BilibiliBvConverter()
+        {
+            for (int i = 0; i < 58; i++)
+            {
+                tr[table[i]] = i;
+            }
+        }
+
+        public static long Decode(string x)
+        {
+            long r = 0;
+            for (int i = 0; i < 6; i++)
+            {
+                r += tr[x[s[i]]] * (long)Math.Pow(58, i);
+            }
+            return (r - add) ^ xor;
+        }
+
+        public static string Encode(long x)
+        {
+            x = (x ^ xor) + add;
+            char[] r = "BV1  4 1 7  ".ToCharArray();
+            for (int i = 0; i < 6; i++)
+            {
+                r[s[i]] = table[(int)(x / (long)Math.Pow(58, i) % 58)];
+            }
+            return new string(r);
+        }
+
+        private static int[] s = { 11, 10, 3, 8, 4, 6 };
+        private static long xor = 177451812;
+        private static long add = 8728348608;
+    }
+}

BBDown/MyOption.cs

@@ -36,6 +36,7 @@ internal class MyOption
         public bool VideoAscending { get; set; } = false;
         public bool AudioAscending { get; set; } = false;
         public bool AllowPcdn { get; set; } = false;
+        public bool ForceReplaceHost { get; set; } = true;
         public string FilePattern { get; set; } = "";
         public string MultiFilePattern { get; set; } = "";
         public string SelectPage { get; set; } = "";

BBDown/Program.cs

@@ -1050,6 +1050,7 @@ private static string FormatSavePath(string savePathFormat, string title, Video?
                     "pageNumber" => p.index.ToString(),
                     "pageNumberWithZero" => p.index.ToString().PadLeft((int)Math.Log10(pagesCount) + 1, '0'),
                     "pageTitle" => GetValidFileName(p.title, filterSlash: true).Trim().TrimEnd('.').Trim(),
+                    "bvid" => p.bvid,
                     "aid" => p.aid,
                     "cid" => p.cid,
                     "ownerName" => p.ownerName == null ? "" : GetValidFileName(p.ownerName, filterSlash: true).Trim().TrimEnd('.').Trim(),