refactor!: rename chat providers to channels

src/infra/channel-activity.ts

@@ -0,0 +1,52 @@
+import type { ChannelId } from "../channels/plugins/types.js";
+export type ChannelDirection = "inbound" | "outbound";
+
+type ActivityEntry = {
+  inboundAt: number | null;
+  outboundAt: number | null;
+};
+
+const activity = new Map<string, ActivityEntry>();
+
+function keyFor(channel: ChannelId, accountId: string) {
+  return `${channel}:${accountId || "default"}`;
+}
+
+function ensureEntry(channel: ChannelId, accountId: string): ActivityEntry {
+  const key = keyFor(channel, 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 recordChannelActivity(params: {
+  channel: ChannelId;
+  accountId?: string | null;
+  direction: ChannelDirection;
+  at?: number;
+}) {
+  const at = typeof params.at === "number" ? params.at : Date.now();
+  const accountId = params.accountId?.trim() || "default";
+  const entry = ensureEntry(params.channel, accountId);
+  if (params.direction === "inbound") entry.inboundAt = at;
+  if (params.direction === "outbound") entry.outboundAt = at;
+}
+
+export function getChannelActivity(params: {
+  channel: ChannelId;
+  accountId?: string | null;
+}): ActivityEntry {
+  const accountId = params.accountId?.trim() || "default";
+  return (
+    activity.get(keyFor(params.channel, accountId)) ?? {
+      inboundAt: null,
+      outboundAt: null,
+    }
+  );
+}
+
+export function resetChannelActivityForTest() {
+  activity.clear();
+}