Add mobile patcher

src/Entities/MobilePatcher.cs

@@ -0,0 +1,46 @@
+using System.Reflection;
+using Discord.WebSocket;
+using HarmonyLib;
+
+namespace Fergun;
+
+/// <summary>
+/// Represents the mobile patcher.
+/// </summary>
+public static class MobilePatcher
+{
+    /// <summary>
+    /// Patches Discord.Net to display the mobile status.
+    /// </summary>
+    public static void Patch()
+    {
+        var harmony = new Harmony(nameof(MobilePatcher));
+
+        var original = AccessTools.Method("Discord.API.DiscordSocketApiClient:SendGatewayAsync");
+        var prefix = typeof(MobilePatcher).GetMethod(nameof(Prefix));
+
+        harmony.Patch(original, new HarmonyMethod(prefix));
+    }
+
+    private static readonly Type _identifyParams =
+        typeof(BaseSocketClient).Assembly.GetType("Discord.API.Gateway.IdentifyParams", true)!;
+
+    private static readonly PropertyInfo? _property = _identifyParams.GetProperty("Properties");
+
+    public static void Prefix(in byte opCode, in object payload)
+    {
+        if (opCode != 2) // Identify
+            return;
+
+        if (payload.GetType() != _identifyParams)
+            return;
+
+        if (_property?.GetValue(payload) is not IDictionary<string, string> props
+            || !props.TryGetValue("$device", out string? device)
+            || device != "Discord.Net")
+            return;
+
+        props["$os"] = "android";
+        props["$browser"] = "Discord Android";
+    }
+}

src/Entities/StartupOptions.cs

@@ -21,4 +21,9 @@ public class StartupOptions
     /// Gets or sets the ID of the guild to register owner commands.
     /// </summary>
     public ulong OwnerCommandsGuildId { get; set; }
+
+    /// <summary>
+    /// Gets or sets a value indicating whether the mobile status should be used.
+    /// </summary>
+    public bool MobileStatus { get; set; }
 }

src/Fergun.csproj

@@ -8,13 +8,14 @@
     <Version>2.0-beta</Version>
   </PropertyGroup>
 
-  <ItemGroup>
+	<ItemGroup>
     <PackageReference Include="Discord.Addons.Hosting" Version="5.1.0" />
     <PackageReference Include="Discord.Net.Interactions" Version="3.5.0" />
     <PackageReference Include="Fergun.Interactive" Version="1.5.4" />
     <PackageReference Include="GScraper" Version="1.0.2" />
     <PackageReference Include="GTranslate" Version="2.1.0" />
     <PackageReference Include="Humanizer.Core" Version="2.14.1" />
+    <PackageReference Include="Lib.Harmony" Version="2.2.1" />
     <PackageReference Include="Microsoft.EntityFrameworkCore.Design" Version="6.0.4">
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
       <PrivateAssets>all</PrivateAssets>

src/Program.cs

@@ -41,6 +41,11 @@
         services.Configure<BotListOptions>(context.Configuration.GetSection(BotListOptions.BotList));
         services.Configure<FergunOptions>(context.Configuration.GetSection(FergunOptions.Fergun));
         services.AddSqlite<FergunContext>(context.Configuration.GetConnectionString("FergunDatabase"));
+
+        if (context.Configuration.GetSection(StartupOptions.Startup).Get<StartupOptions>().MobileStatus)
+        {
+            MobilePatcher.Patch();
+        }
     })
     .ConfigureDiscordShardedHost((context, config) =>
     {

src/appsettings.json

@@ -7,7 +7,8 @@
     {
         "Token": "",
         "TestingGuildId": 0,
-        "OwnerCommandsGuildId": 0
+        "OwnerCommandsGuildId": 0,
+        "MobileStatus": false
     },
     "Fergun":
     {