KnowBihar Technical Architecture & Changelog

// Eventarc v2 Firestore -> MongoDB Atlas Sync Trigger
exports.syncPosts = onDocumentWritten(
  {
    document: "posts/{docId}",
    secrets: [MONGODB_URI_SECRET],
    region: "asia-south2"
  },
  async (event) => {
    const { before, after } = event.data;
    const db = await getDb("test");
    if (!after.exists) {
      await db.collection("posts").deleteOne({ firestoreId: event.params.docId });
      return;
    }
    await db.collection("posts").updateOne(
      { firestoreId: event.params.docId },
      { $set: { ...after.data(), firestoreId: event.params.docId, _syncedAt: new Date() } },
      { upsert: true }
    );
  }
);