// Database schema // Firestore const collection = { rooms: { roomId: { createdAt: 'timestamp', ownerId: 'userId', messages: { messageId: { createdAt: 'timestamp', senderId: 'userId', content: 'Message content', }, }, }, }, users: { userId: { name: 'Anonymous', }, }, }; // Realtime Database - needed for tracking user presence const turtle = { // Needed for database triggers updating Firestore available: { roomId: { createdAt: '2020-08-12T00:13:16.273Z', }, }, // Keeping track of which users are present in a room rooms: { roomId: { userId: { name: 'Username', }, }, }, };