feat: invite create event

Catalogger.Backend/Bot/Responders/Invites/InviteCreateResponder.cs

@@ -0,0 +1,70 @@
+using Catalogger.Backend.Cache;
+using Catalogger.Backend.Database;
+using Catalogger.Backend.Database.Queries;
+using Catalogger.Backend.Extensions;
+using Catalogger.Backend.Services;
+using Remora.Discord.API.Abstractions.Gateway.Events;
+using Remora.Discord.API.Abstractions.Rest;
+using Remora.Discord.Extensions.Embeds;
+using Remora.Discord.Gateway.Responders;
+using Remora.Results;
+
+namespace Catalogger.Backend.Bot.Responders.Invites;
+
+public class InviteCreateResponder(
+    ILogger logger,
+    DatabaseContext db,
+    IInviteCache inviteCache,
+    IDiscordRestGuildAPI guildApi,
+    WebhookExecutorService webhookExecutor
+) : IResponder<IInviteCreate>
+{
+    private readonly ILogger _logger = logger.ForContext<InviteCreateResponder>();
+
+    public async Task<Result> RespondAsync(IInviteCreate evt, CancellationToken ct = default)
+    {
+        var guildId = evt.GuildID.Value;
+
+        var invitesResult = await guildApi.GetGuildInvitesAsync(guildId, ct);
+        if (!invitesResult.IsSuccess)
+        {
+            _logger.Error(
+                "Error fetching new invites for guild {GuildId}: {Error}",
+                guildId,
+                invitesResult.Error
+            );
+        }
+        else
+        {
+            await inviteCache.SetAsync(guildId, invitesResult.Entity);
+        }
+
+        var embed = new EmbedBuilder()
+            .WithTitle("Invite created")
+            .WithDescription($"A new invite (**{evt.Code}**) was created for <#{evt.ChannelID}>.")
+            .WithColour(DiscordUtils.Green)
+            .WithFooter($"Code: {evt.Code}");
+
+        embed.AddField("Created by", evt.Inviter.GetOrThrow().PrettyFormat());
+        embed.AddField(
+            "Maximum uses",
+            evt.MaxUses != 0 ? evt.MaxUses.ToString() : "Infinite",
+            inline: true
+        );
+        embed.AddField(
+            "Expires",
+            evt.MaxAge == TimeSpan.Zero
+                ? "Never"
+                : $"<t:{(DateTimeOffset.UtcNow + evt.MaxAge).ToUnixTimeSeconds()}>",
+            inline: true
+        );
+
+        var guildConfig = await db.GetGuildAsync(guildId, ct);
+        webhookExecutor.QueueLog(
+            guildConfig,
+            LogChannelType.InviteCreate,
+            embed.Build().GetOrThrow()
+        );
+        return Result.Success;
+    }
+}

Catalogger.Backend/Extensions/DiscordExtensions.cs

@@ -150,6 +150,9 @@ public static class DiscordExtensions
         return filterByIds != null ? sorted.Where(r => filterByIds.Contains(r.ID)) : sorted;
     }
 
+    public static string PrettyFormat(this IUser user, bool addMention = true) =>
+        addMention ? $"{user.Tag()} <@{user.ID}>" : user.Tag();
+
     public static async Task<string> TryFormatUserAsync(
         this UserCache userCache,
         Snowflake userId,
@@ -157,12 +160,10 @@ public static class DiscordExtensions
     )
     {
         var user = await userCache.GetUserAsync(userId);
-        if (addMention)
+        if (user != null)
-            return user != null
+            return user.PrettyFormat(addMention);
-                ? $"{user.Tag()} <@{user.ID}>"
-                : $"*(unknown user {userId}) <@{userId}>*";
 
-        return user != null ? user.Tag() : $"*(unknown user {userId})*";
+        return addMention ? $"*(unknown user {userId})* <@{userId}>" : $"*(unknown user {userId})*";
     }
 
     public static int TextLength(this IEmbed embed)