feat: migrate to UnifiedPush

lib/push/unified-push.ts

@@ -0,0 +1,57 @@
+import { logger } from '@/lib/logger';
+import type { StateChange, SubscriptionRecord } from './types';
+import { sendWebPush } from './web-push';
+import { getVapidKeys } from './vapid';
+
+interface UnifiedPushPayload {
+  kind: 'jmap-state-change';
+  title: string;
+  body: string;
+  changed: Record<string, Record<string, string>>;
+}
+
+function buildPayload(record: SubscriptionRecord, change: StateChange): UnifiedPushPayload {
+  const types = new Set<string>();
+  for (const perAccount of Object.values(change.changed)) {
+    for (const type of Object.keys(perAccount)) types.add(type);
+  }
+  const hasEmail = types.has('Email') || types.has('EmailDelivery');
+  return {
+    kind: 'jmap-state-change',
+    title: hasEmail ? 'New mail' : 'Mailbox updated',
+    body: record.accountLabel ?? '',
+    changed: change.changed,
+  };
+}
+
+export async function sendUnifiedPush(
+  record: SubscriptionRecord,
+  change: StateChange,
+): Promise<boolean> {
+  try {
+    const vapid = await getVapidKeys();
+    const payload = Buffer.from(JSON.stringify(buildPayload(record, change)), 'utf-8');
+    const result = await sendWebPush({
+      endpoint: record.endpoint,
+      p256dh: record.p256dh,
+      auth: record.auth,
+      payload,
+      vapid,
+      ttlSeconds: 60,
+      urgency: 'high',
+    });
+    if (!result.ok) {
+      logger.warn('push: unified-push delivery failed', {
+        status: result.status,
+        body: result.body,
+      });
+      return false;
+    }
+    return true;
+  } catch (error) {
+    logger.warn('push: unified-push delivery error', {
+      error: error instanceof Error ? error.message : 'Unknown error',
+    });
+    return false;
+  }
+}