From 005fd7b8c64c947bb4aba2c4a659b83f3a843632 Mon Sep 17 00:00:00 2001
From: Kwoth <master.kwoth@gmail.com>
Date: Thu, 15 Sep 2022 17:02:53 +0200
Subject: [PATCH] Possible fix for missing IGuildUser when using guild
 commands, closes #383

---
 .../Common/TypeReaders/GuildUserTypeReader.cs | 33 +++++++++++++++++++
 1 file changed, 33 insertions(+)
 create mode 100644 src/NadekoBot/Common/TypeReaders/GuildUserTypeReader.cs

diff --git a/src/NadekoBot/Common/TypeReaders/GuildUserTypeReader.cs b/src/NadekoBot/Common/TypeReaders/GuildUserTypeReader.cs
new file mode 100644
index 000000000..1991443e5
--- /dev/null
+++ b/src/NadekoBot/Common/TypeReaders/GuildUserTypeReader.cs
@@ -0,0 +1,33 @@
+namespace NadekoBot.Common.TypeReaders;
+
+public sealed class GuildUserTypeReader : NadekoTypeReader<IGuildUser>
+{
+    public override async ValueTask<TypeReaderResult<IGuildUser>> ReadAsync(ICommandContext ctx, string input)
+    {
+        if (ctx.Guild is null)
+            return TypeReaderResult.FromError<IGuildUser>(CommandError.Unsuccessful, "Must be in a guild.");
+
+        input = input.Trim();
+        IGuildUser? user = null;
+        if (MentionUtils.TryParseUser(input, out var id))
+            user = await ctx.Guild.GetUserAsync(id, CacheMode.AllowDownload);
+        
+        if (ulong.TryParse(input, out id))
+            user = await ctx.Guild.GetUserAsync(id, CacheMode.AllowDownload);
+
+        if (user is null)
+        {
+            var users = await ctx.Guild.GetUsersAsync(CacheMode.CacheOnly);
+            user = users.FirstOrDefault(x => x.Username == input)
+                   ?? users.FirstOrDefault(x =>
+                       string.Equals(x.ToString(), input, StringComparison.InvariantCultureIgnoreCase))
+                   ?? users.FirstOrDefault(x =>
+                       string.Equals(x.Username, input, StringComparison.InvariantCultureIgnoreCase));
+        }
+
+        if (user is null)
+            return TypeReaderResult.FromError<IGuildUser>(CommandError.ObjectNotFound, "User not found.");
+        
+        return TypeReaderResult.FromSuccess(user);
+    }
+}
\ No newline at end of file