byre/web/src/notifications.ts

import type { ByreEvent, InboxItem, NotificationPrefs } from "./api.js";
import { findTask, focusTask, state } from "./state.js";

function wants(p: NotificationPrefs, item: InboxItem): boolean {
  switch (item.kind) {
    case "question":
      return p.questions;
    case "session_error":
      return p.errors;
    case "rate_limited":
      return p.rate_limits;
  }
}

function itemText(item: InboxItem): string {
  const p = item.payload;
  return item.kind === "question" ? String(p["question"] ?? "")
    : item.kind === "session_error" ? `Error: ${String(p["error"] ?? "")}`
    : "Rate limited";
}

function show(taskId: string, tag: string, text: string): void {
  const line = text.trim().split("\n")[0] ?? "";
  const title = findTask(taskId)?.title;
  const n = new Notification(title ? `byre · ${title}` : "byre", { body: line.length > 200 ? `${line.slice(0, 199)}…` : line, tag });
  n.onclick = () => {
    window.focus();
    if (taskId) {
      focusTask(taskId);
    }
    n.close();
  };
}

function allowed(): boolean {
  return "Notification" in window && Notification.permission === "granted" && !!state.me;
}

export function notifyInbox(item: InboxItem): void {
  if (!allowed() || !wants(state.me!.notification_prefs, item)) {
    return;
  }
  show(item.task_id, item.id, itemText(item));
}

export function notifyTurn(ev: ByreEvent): void {
  if (!allowed() || !state.me!.notification_prefs.reports || ev.payload["summary"] !== true || !ev.task_id) {
    return;
  }
  show(ev.task_id, `turn-${ev.seq}`, String(ev.payload["result"] ?? ""));
}