Gateway: per-watch notification switches, model list for new threads, and Ask before acting

gateway/src/push.ts

@@ -1,11 +1,35 @@
 // Delivers pushes to paired watches through APNs, and remembers Apple's last answer so the watch's
-// status screen can show whether pushes are getting through. Without APNs settings it only logs.
+// status screen can show whether pushes are getting through. Each watch only gets the kinds of push
+// it asked for. Without APNs settings it only logs.
 
 import type { Apns } from "./apns.ts";
-import type { PushResult } from "./contract.ts";
+import type { NotificationPrefs, PushResult } from "./contract.ts";
 import type { Db, DeviceRow } from "./db.ts";
 import type { Push } from "./notify.ts";
 
+const ALL_ON: NotificationPrefs = { needsMe: true, finished: true, failed: true, subagents: true };
+
+/** A watch's choices, with every kind it never set left on. */
+export function notificationPrefs(device: DeviceRow): NotificationPrefs {
+  const saved: Partial<NotificationPrefs> = device.notifications ? JSON.parse(device.notifications) : {};
+  return { ...ALL_ON, ...saved };
+}
+
+/** Whether a watch with these choices wants this push. Host problems and tests always go out. */
+export function wants(prefs: NotificationPrefs, push: Push): boolean {
+  switch (push.category) {
+    case "approval":
+    case "input":
+      return push.fromSubagent ? prefs.subagents : prefs.needsMe;
+    case "finished":
+      return prefs.finished;
+    case "failed":
+      return prefs.failed;
+    default:
+      return true;
+  }
+}
+
 export class Pusher {
   /** Apple's answer to the most recent push sent to any watch. */
   last: PushResult | null = null;
@@ -20,9 +44,11 @@ export class Pusher {
     return this.apns !== null;
   }
 
-  /** Sends to every paired watch that registered for pushes. */
+  /** Sends to every paired watch that registered for pushes and wants this kind. */
   sendAll = async (push: Push): Promise<void> => {
-    const devices = this.db.devices.active().filter((device) => device.apns_token && device.apns_env);
+    const devices = this.db.devices
+      .active()
+      .filter((device) => device.apns_token && device.apns_env && wants(notificationPrefs(device), push));
     if (!this.apns || devices.length === 0) {
       this.log(`push (not sent): [${push.category}] ${push.title}: ${push.body}`);
       return;