feat(data): support challenge api

ArcaeaUnlimitedAPI.Lib/ArcaeaUnlimitedAPI.Lib.csproj

@@ -2,7 +2,7 @@
 
     <PropertyGroup>
         <Title>ArcaeaUnlimitedAPI.Lib</Title>
-        <PackageVersion>2.0.0</PackageVersion>
+        <PackageVersion>2.1.0</PackageVersion>
         <Authors>b1acksoil</Authors>
         <Description>Lib for ArcaeaUnlimitedAPI.</Description>
         <PackageTags>Arcaea</PackageTags>

ArcaeaUnlimitedAPI.Lib/Core/AuaDataApi.cs

@@ -230,4 +230,44 @@ public Task<int[][]> Density(string songname, ArcaeaDifficulty difficulty = Arca
         => GetDensity(songname, AuaSongQueryType.SongName, difficulty);
 
     #endregion /data/density
+
+    #region /data/challenge
+
+    private async Task<string> GetChallenge(string path, string? body, long? timestamp)
+    {
+        var qb = new QueryBuilder()
+            .Add("path", path);
+
+        if (body is not null) qb.Add("body", body);
+        if (timestamp is not null) qb.Add("timestamp", timestamp.ToString()!);
+
+        var response = JsonSerializer.Deserialize<AuaResponse<string>>(
+            await _client.GetStringAsync("data/challenge" + qb.Build()))!;
+        if (response.Status < 0)
+            throw new AuaException(response.Status, response.Message!);
+        return response.Content!;
+    }
+
+    /// <summary>
+    /// Get challenge of a specified arcapi path.
+    /// </summary>
+    /// <param name="path">Request arcapi path.</param>
+    /// <param name="body">Request body, optional when body is empty.</param>
+    /// <param name="timestamp">Request timestamp.</param>
+    /// <returns>Challenge string.</returns>
+    /// <remarks>It is designed for the release version of AUA, and not available for the release version.</remarks>
+    public Task<string> Challenge(string path, string? body = null, long? timestamp = null)
+        => GetChallenge(path, body, timestamp);
+
+    /// <summary>
+    /// Get challenge of a specified arcapi path.
+    /// </summary>
+    /// <param name="path">Request arcapi path.</param>
+    /// <param name="timestamp">Request timestamp.</param>
+    /// <returns>Challenge string.</returns>
+    /// <remarks>It is designed for the release version of AUA, and not available for the release version.</remarks>
+    public Task<string> Challenge(string path, long? timestamp = null)
+        => GetChallenge(path, null, timestamp);
+
+    #endregion /data/challenge
 }

README.md

@@ -58,7 +58,7 @@ Console.WriteLine(songinfo.Difficulties[2].NameEn);
 - [x] [data/theory](https://github.com/Arcaea-Infinity/ArcaeaUnlimitedAPI-Wiki/blob/main/data/theory.md)
 - [x] [data/playdata](https://github.com/Arcaea-Infinity/ArcaeaUnlimitedAPI-Wiki/blob/main/data/playdata.md)
 - [x] [data/density](https://github.com/Arcaea-Infinity/ArcaeaUnlimitedAPI-Wiki/blob/main/data/density.md)
-- [ ] [data/challenge](https://github.com/Arcaea-Infinity/ArcaeaUnlimitedAPI-Wiki/blob/main/data/challenge.md)
+- [x] [data/challenge](https://github.com/Arcaea-Infinity/ArcaeaUnlimitedAPI-Wiki/blob/main/data/challenge.md)
 
 ## License