feat: post stats to discord.bots.gg

Catalogger.Backend/Config.cs

@@ -60,6 +60,9 @@ public class Config
 
         // If enabled, nothing will be logged.
         public bool TestMode { get; init; } = false;
+
+        // Token for discord.bots.gg stats
+        public string? BotsGgToken { get; init; }
     }
 
     public class WebConfig

Catalogger.Backend/Services/StatusUpdateService.cs

@@ -13,6 +13,9 @@
 // You should have received a copy of the GNU Affero General Public License
 // along with this program.  If not, see <https://www.gnu.org/licenses/>.
 
+using System.Net.Http.Headers;
+using System.Text.Json;
+using System.Text.Json.Serialization;
 using Catalogger.Backend.Bot;
 using Remora.Discord.API.Abstractions.Objects;
 using Remora.Discord.API.Gateway.Commands;
@@ -24,15 +27,16 @@ public class StatusUpdateService(ILogger logger, ShardedGatewayClient shardedCli
     : BackgroundService
 {
     private readonly ILogger _logger = logger.ForContext<StatusUpdateService>();
+    private readonly HttpClient _client = new();
 
     protected override async Task ExecuteAsync(CancellationToken ct)
     {
         using var timer = new PeriodicTimer(TimeSpan.FromMinutes(3));
         while (await timer.WaitForNextTickAsync(ct))
-            UpdateShardStatuses(ct);
+            await UpdateShardStatuses(ct);
     }
 
-    private void UpdateShardStatuses(CancellationToken ct = default)
+    private async Task UpdateShardStatuses(CancellationToken ct = default)
     {
         _logger.Information(
             "Updating status for {TotalShards} shards. Guild count is {GuildCount}",
@@ -59,6 +63,8 @@ public class StatusUpdateService(ILogger logger, ShardedGatewayClient shardedCli
 
             client.SubmitCommand(PresenceFor(shardId));
         }
+
+        await ReportStatsAsync();
     }
 
     private UpdatePresence PresenceFor(int shardId)
@@ -75,4 +81,43 @@ public class StatusUpdateService(ILogger logger, ShardedGatewayClient shardedCli
             Activities: [new Activity(Name: "Beep", Type: ActivityType.Custom, State: status)]
         );
     }
+
+    private async Task ReportStatsAsync()
+    {
+        if (config.Discord.BotsGgToken == null)
+            return;
+
+        _logger.Debug("Posting stats to discord.bots.gg");
+
+        var req = new HttpRequestMessage(
+            HttpMethod.Post,
+            $"https://discord.bots.gg/api/v1/bots/{config.Discord.ApplicationId}/stats"
+        );
+        req.Headers.Add("Authorization", config.Discord.BotsGgToken);
+        req.Content = new StringContent(
+            JsonSerializer.Serialize(
+                new BotsGgStats(
+                    (int)CataloggerMetrics.GuildsCached.Value,
+                    shardedClient.TotalShards
+                )
+            ),
+            new MediaTypeHeaderValue("application/json", "utf-8")
+        );
+
+        var resp = await _client.SendAsync(req);
+        if (!resp.IsSuccessStatusCode)
+        {
+            var content = await resp.Content.ReadAsStringAsync();
+            _logger.Error(
+                "Error updating stats for discord.bots.gg: {StatusCode}, {Content}",
+                (int)resp.StatusCode,
+                content
+            );
+        }
+    }
+
+    private record BotsGgStats(
+        [property: JsonPropertyName("guildCount")] int GuildCount,
+        [property: JsonPropertyName("shardCount")] int ShardCount
+    );
 }