Feed Logic - abhiram-shaji/Langroove GitHub Wiki

Function:
This custom hook manages fetching and updating a list of topics from Firestore in real-time.

Example:

const { topics, handleTopicPress, loading } = useFeed();

This allows you to use the topics data and handle topic interactions in a component.

Function:
This hook manages the state of topics and loading status.

Example:

const [topics, setTopics] = useState<any[]>([]);
const [loading, setLoading] = useState(true);

Here, topics starts as an empty array, and loading is initially true while data is being fetched.

Function:
This hook is used to fetch data from Firestore when the component mounts.

Example:

useEffect(() => {
  const topicsCollection = collection(db, 'topics');
  // Code to set up real-time listener
}, []); // Empty array means this runs once

This runs once when the component mounts to set up a listener for the topics collection.

Function:
This method listens for real-time updates to the specified Firestore collection.

Example:

const unsubscribe = onSnapshot(topicsCollection, (snapshot) => {
  const topicsData = snapshot.docs.map(doc => ({
    id: doc.id,
    ...doc.data(),
  }));
  setTopics(topicsData);
  setLoading(false);
}, (error) => {
  console.error('Error fetching real-time topics:', error);
  setLoading(false);
});

This listens for changes in the topics collection and updates the topics state whenever changes occur.

Function:
This part ensures the real-time listener is removed when the component unmounts to prevent memory leaks.

Example:

return () => unsubscribe();

This line returns a function that will unsubscribe from the Firestore listener when the component is no longer in use.

Function:
This function can be used to handle interactions when a topic is pressed.

Example:

const handleTopicPress = (description: string) => {
  console.log(`Tapped on ${description}`);
};

This logs a message when a topic is tapped, which you can expand to perform other actions.