feat(date-memories): add onDateHistoryCreated Cloud Function

functions/src/dates/onDateHistoryCreated.ts

@@ -0,0 +1,61 @@
+import * as functions from 'firebase-functions'
+import * as admin from 'firebase-admin'
+import { recipientInQuietHours } from '../notifications/quietHours'
+
+/**
+ * Fires when a date is logged as completed (`couples/{coupleId}/date_history/{dateId}` created). Nudges
+ * the OTHER partner (not the one who logged it) to add their reflection — so the reflect→reveal loop
+ * starts even if the logger doesn't reflect right away. Gated on `notifPartnerAnswered` + quiet hours.
+ */
+export const onDateHistoryCreated = functions.firestore
+  .document('couples/{coupleId}/date_history/{dateId}')
+  .onCreate(async (snap, context) => {
+    const { coupleId, dateId } = context.params as { coupleId: string; dateId: string }
+    const db = admin.firestore()
+
+    const addedBy = snap.data()?.addedBy as string | undefined
+    const coupleDoc = await db.collection('couples').doc(coupleId).get()
+    if (!coupleDoc.exists) return
+    const userIds = (coupleDoc.data()?.userIds ?? []) as string[]
+    const partnerId = userIds.find((u) => u !== addedBy)
+    if (!partnerId) return
+
+    const partnerUserDoc = await db.collection('users').doc(partnerId).get()
+    if (partnerUserDoc.data()?.notifPartnerAnswered === false) return
+
+    const title = 'You went on a date 💜'
+    const body = 'Reflect on it together while it’s fresh.'
+
+    await db.collection('users').doc(partnerId).collection('notification_queue').add({
+      type: 'date_logged', title, body, read: false, createdAt: admin.firestore.FieldValue.serverTimestamp(),
+    })
+
+    if (recipientInQuietHours(partnerUserDoc.data())) return
+
+    const tokens: string[] = []
+    const legacy = partnerUserDoc.data()?.fcmToken
+    if (typeof legacy === 'string' && legacy.length > 0) tokens.push(legacy)
+    const tokenSnap = await db.collection('users').doc(partnerId).collection('fcmTokens').get()
+    tokenSnap.docs.forEach((d) => {
+      const t = d.data()?.token
+      if (typeof t === 'string' && t.length > 0 && !tokens.includes(t)) tokens.push(t)
+    })
+    if (tokens.length === 0) return
+
+    const payload: admin.messaging.MessagingPayload = {
+      notification: { title, body },
+      data: { type: 'date_logged', couple_id: coupleId, date_id: dateId },
+    }
+    const results = await Promise.allSettled(
+      tokens.map((token) =>
+        admin.messaging().send({
+          ...payload,
+          token,
+          android: { notification: { channelId: 'partner_activity' } },
+        } as admin.messaging.Message)
+      )
+    )
+    results.forEach((r, i) => {
+      if (r.status === 'rejected') console.warn(`[onDateHistoryCreated] FCM failed for ${tokens[i]}:`, r.reason)
+    })
+  })