feat: shard status update, delete old messages when they expire

Catalogger.Backend/Services/StatusUpdateService.cs

@@ -0,0 +1,57 @@
+using Catalogger.Backend.Bot;
+using Remora.Discord.API.Abstractions.Objects;
+using Remora.Discord.API.Gateway.Commands;
+using Remora.Discord.API.Objects;
+
+namespace Catalogger.Backend.Services;
+
+public class StatusUpdateService(ILogger logger, ShardedGatewayClient shardedClient)
+    : BackgroundService
+{
+    private readonly ILogger _logger = logger.ForContext<StatusUpdateService>();
+
+    protected override async Task ExecuteAsync(CancellationToken ct)
+    {
+        using var timer = new PeriodicTimer(TimeSpan.FromMinutes(3));
+        while (await timer.WaitForNextTickAsync(ct))
+            UpdateShardStatuses(ct);
+    }
+
+    private void UpdateShardStatuses(CancellationToken ct = default)
+    {
+        _logger.Information(
+            "Updating status for {TotalShards} shards. Guild count is {GuildCount}",
+            shardedClient.TotalShards,
+            CataloggerMetrics.GuildsCached.Value
+        );
+
+        foreach (var (shardId, client) in shardedClient.Shards)
+        {
+            if (!ShardedGatewayClient.IsConnected(client))
+            {
+                _logger.Warning(
+                    "Cannot update status for shard {ShardId} as it is not connected",
+                    shardId
+                );
+                continue;
+            }
+
+            client.SubmitCommand(PresenceFor(shardId));
+        }
+    }
+
+    private UpdatePresence PresenceFor(int shardId)
+    {
+        var status = $"/catalogger help | in {CataloggerMetrics.GuildsCached.Value} servers";
+
+        if (shardedClient.TotalShards != 1)
+            status += $" | shard {shardId + 1}/{shardedClient.TotalShards}";
+
+        return new UpdatePresence(
+            Status: UserStatus.Online,
+            IsAFK: false,
+            Since: null,
+            Activities: [new Activity(Name: "Beep", Type: ActivityType.Custom, State: status)]
+        );
+    }
+}