Error Handling and Optimizations in Real-time Sync

Presents strategies for error handling when integrating Firebase with TanStack Config and discusses optimizations to reduce latency and improve app performance.

const store = createTanStackStore({
  initialState: { messages: [], error: null },
  actions: {
    addMessage: (state, message) => ({
      messages: [...state.messages, message]
    }),
    setError: (state, error) => ({
      error: error
    })
  }
});

This code initializes a TanStack Store with an initial state containing an array for messages and a null for errors. It also includes actions for adding a message to the state and setting an error.

function syncMessages() {
  const messagesRef = firebase.firestore().collection('messages');
  messagesRef.onSnapshot(snapshot => {
    snapshot.docChanges().forEach(change => {
      if (change.type === 'added') {
        store.actions.addMessage(change.doc.data());
      }
    });
  },
  error => {
    store.actions.setError(error.message);
  });
}

This function listens for real-time updates from Firebase's Firestore. When a new message is added, it updates the TanStack Store state with the new message. If an error occurs, it sets the error message in the store.

store.subscribe(state => {
  if (state.error) {
    console.error('Sync error:', state.error);
    // Optionally, implement retry logic or show error to the user
  }
});

This code subscribes to the TanStack Store state. Whenever there is an error, it logs the error message. Developers can extend this by implementing retry logic or displaying the error message to the user.

// Optimization: Debounce the state updates to batch processing
function debounce(func, wait) {
  let timeout;
  return function(...args) {
    const later = () => {
      clearTimeout(timeout);
      func(...args);
    };
    clearTimeout(timeout);
    timeout = setTimeout(later, wait);
  };
}

This code implements a debounce function. This can be used to debounce state updates, effectively batching rapid state changes to reduce re-rendering frequency and improve performance.