init

Catalogger.Backend/Extensions/DiscordExtensions.cs

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+using Remora.Discord.API.Abstractions.Objects;
+using Remora.Rest.Core;
+using Remora.Results;
+
+namespace Catalogger.Backend.Extensions;
+
+public static class DiscordExtensions
+{
+    public static string Tag(this IPartialUser user)
+    {
+        var discriminator = user.Discriminator.OrDefault();
+        return discriminator == 0 ? user.Username.Value : $"{user.Username.Value}#{discriminator:0000}";
+    }
+
+    public static string AvatarUrl(this IUser user, int size = 256)
+    {
+        if (user.Avatar != null)
+        {
+            var ext = user.Avatar.HasGif ? ".gif" : ".webp";
+            return $"https://cdn.discordapp.com/avatars/{user.ID}/{user.Avatar.Value}{ext}?size={size}";
+        }
+
+        var avatarIndex = user.Discriminator == 0 ? (int)((user.ID.Value >> 22) % 6) : user.Discriminator % 5;
+        return $"https://cdn.discordapp.com/embed/avatars/{avatarIndex}.png?size={size}";
+    }
+
+    public static ulong ToUlong(this Snowflake snowflake) => snowflake.Value;
+
+    public static ulong ToUlong(this Optional<Snowflake> snowflake)
+    {
+        if (!snowflake.IsDefined()) throw new Exception("ToUlong called on an undefined Snowflake");
+        return snowflake.Value.Value;
+    }
+
+    public static T GetOrThrow<T>(this Result<T> result)
+    {
+        if (result.Error != null) throw new DiscordRestException(result.Error.Message);
+        return result.Entity;
+    }
+
+    public static async Task<T> GetOrThrow<T>(this Task<Result<T>> result) => (await result).GetOrThrow();
+
+    public class DiscordRestException(string message) : Exception(message);
+}