List of Friends Logic - abhiram-shaji/Langroove GitHub Wiki

Function:
This custom hook manages fetching and filtering a user's friend list from Firestore.

Example:

const { search, setSearch, filteredFriends } = useFriendList();

This allows you to access the friend list, search functionality, and filtered results in a component.

Function:
This hook manages the state of friends and the search term.

Example:

const [friends, setFriends] = useState<Friend[]>([]);
const [search, setSearch] = useState<string>('');

Here, friends starts as an empty array, and search is an empty string for searching friends.

Function:
This retrieves the currently logged-in user using Firebase Authentication.

Example:

const currentUser = auth.currentUser;

This gets the current user object, which is used to fetch that user’s friends.

Function:
This hook fetches the friends list when the component mounts and whenever the current user changes.

Example:

useEffect(() => {
  if (currentUser) {
    fetchFriends();
  }
}, [currentUser]);

When currentUser is available, it calls the fetchFriends function to load friends from Firestore.

Function:
This function retrieves the logged-in user’s friends list from Firestore.

Example:

const fetchFriends = async () => {
  if (!currentUser) return;
  // Fetching logic here
};

It checks if the user is logged in, then fetches their document and friend IDs.

Function:
This fetches details for each friend using their IDs stored in the current user’s document.

Example:

const friendsPromises = friendsIds.map(async (friendId: string) => {
  const friendDocRef = doc(db, 'users', friendId);
  const friendDoc = await getDoc(friendDocRef);
  // Extract friend data
});

It maps over the friend IDs to create a promise for fetching each friend's data.

Function:
After fetching friend data, this updates the friends state with the retrieved details.

Example:

setFriends(friendsData); // Update state with fetched friends

This sets the friends state to the list of friends retrieved from Firestore.

Function:
This filters the friends list based on the current search term.

Example:

const filteredFriends = friends.filter((friend) =>
  friend.name.toLowerCase().includes(search.toLowerCase())
);

This creates a new array of friends that match the search term (case-insensitive).