feat(providers): improve doctor + status probes

src/infra/provider-activity.ts

@@ -0,0 +1,53 @@
+export type ProviderId = "discord" | "telegram" | "whatsapp";
+export type ProviderDirection = "inbound" | "outbound";
+
+type ActivityEntry = {
+  inboundAt: number | null;
+  outboundAt: number | null;
+};
+
+const activity = new Map<string, ActivityEntry>();
+
+function keyFor(provider: ProviderId, accountId: string) {
+  return `${provider}:${accountId || "default"}`;
+}
+
+function ensureEntry(provider: ProviderId, accountId: string): ActivityEntry {
+  const key = keyFor(provider, accountId);
+  const existing = activity.get(key);
+  if (existing) return existing;
+  const created: ActivityEntry = { inboundAt: null, outboundAt: null };
+  activity.set(key, created);
+  return created;
+}
+
+export function recordProviderActivity(params: {
+  provider: ProviderId;
+  accountId?: string | null;
+  direction: ProviderDirection;
+  at?: number;
+}) {
+  const at = typeof params.at === "number" ? params.at : Date.now();
+  const accountId = params.accountId?.trim() || "default";
+  const entry = ensureEntry(params.provider, accountId);
+  if (params.direction === "inbound") entry.inboundAt = at;
+  if (params.direction === "outbound") entry.outboundAt = at;
+}
+
+export function getProviderActivity(params: {
+  provider: ProviderId;
+  accountId?: string | null;
+}): ActivityEntry {
+  const accountId = params.accountId?.trim() || "default";
+  return (
+    activity.get(keyFor(params.provider, accountId)) ?? {
+      inboundAt: null,
+      outboundAt: null,
+    }
+  );
+}
+
+export function resetProviderActivityForTest() {
+  activity.clear();
+}
+