Discord: refine presence config defaults (#10855) (thanks @h0tp-ftw)

src/discord/monitor/presence.ts

@@ -0,0 +1,49 @@
+import type { Activity, UpdatePresenceData } from "@buape/carbon/gateway";
+import type { DiscordAccountConfig } from "../../config/config.js";
+
+const DEFAULT_CUSTOM_ACTIVITY_TYPE = 4;
+const CUSTOM_STATUS_NAME = "Custom Status";
+
+type DiscordPresenceConfig = Pick<
+  DiscordAccountConfig,
+  "activity" | "status" | "activityType" | "activityUrl"
+>;
+
+export function resolveDiscordPresenceUpdate(
+  config: DiscordPresenceConfig,
+): UpdatePresenceData | null {
+  const activityText = typeof config.activity === "string" ? config.activity.trim() : "";
+  const status = typeof config.status === "string" ? config.status.trim() : "";
+  const activityType = config.activityType;
+  const activityUrl = typeof config.activityUrl === "string" ? config.activityUrl.trim() : "";
+
+  const hasActivity = Boolean(activityText);
+  const hasStatus = Boolean(status);
+
+  if (!hasActivity && !hasStatus) {
+    return null;
+  }
+
+  const activities: Activity[] = [];
+
+  if (hasActivity) {
+    const resolvedType = activityType ?? DEFAULT_CUSTOM_ACTIVITY_TYPE;
+    const activity: Activity =
+      resolvedType === DEFAULT_CUSTOM_ACTIVITY_TYPE
+        ? { name: CUSTOM_STATUS_NAME, type: resolvedType, state: activityText }
+        : { name: activityText, type: resolvedType };
+
+    if (resolvedType === 1 && activityUrl) {
+      activity.url = activityUrl;
+    }
+
+    activities.push(activity);
+  }
+
+  return {
+    since: null,
+    activities,
+    status: (status || "online") as UpdatePresenceData["status"],
+    afk: false,
+  };
+}