Pseudo Code for Adding a Friend Request on a Website

Overview

This pseudo code describes a process for sending a friend request to another user on a social networking website. It includes checking if the user exists, verifying if a friend request can be sent, and processing the friend request.

Main Components

1. Input Handling
2. User Validation
3. Friend Request Logic
4. Database Update
5. Response to User

Pseudo Code Structure

1. Input Handling

FUNCTION addFriendRequest(currentUser, targetUserId):
    INPUT targetUserId  // ID of the user to whom the request is being sent
    OUTPUT successMessage  // Message to communicate outcome

2. User Validation

    userExists = checkUserExists(targetUserId)  // Check if the target user exists
    IF NOT userExists THEN
        RETURN "User does not exist"  // Error message if the target user is not found
    END IF

    isAlreadyFriends = checkIfAlreadyFriends(currentUser, targetUserId)  // Verify friendship status
    IF isAlreadyFriends THEN
        RETURN "You are already friends"  // Error message if users are already friends
    END IF

    requestSent = checkIfRequestAlreadySent(currentUser, targetUserId)  // Check if request is already sent
    IF requestSent THEN
        RETURN "Friend request already sent"  // Error message for duplicate request
    END IF

3. Friend Request Logic

    // Prepare friend request details
    friendRequest = CREATE friendRequest  // New friend request object
    friendRequest.senderId = currentUser.id  // Set the sender's ID
    friendRequest.receiverId = targetUserId  // Set the receiver's ID
    friendRequest.status = "Pending"  // Set initial status of the request

4. Database Update

    success = saveFriendRequestToDatabase(friendRequest)  // Save the friend request in the database
    IF NOT success THEN
        RETURN "Error sending friend request"  // Error message for database issues
    END IF

5. Response to User

    RETURN "Friend request sent successfully"  // Success message upon successful operation
END FUNCTION

Functions Used in Pseudo Code

• checkUserExists(userId): Returns true if the user with the provided ID exists.
• checkIfAlreadyFriends(userId1, userId2): Returns true if userId1 and userId2 are already friends.
• checkIfRequestAlreadySent(userId1, userId2): Returns true if a friend request from userId1 to userId2 has already been sent.
• saveFriendRequestToDatabase(friendRequest): Saves the friend request to the database, returns true if successful.

Conclusion

This pseudo code outlines a clear and structured approach to processing a friend request on a social networking website, focusing on input validation, logical processing, database interaction, and user feedback. The design emphasizes clarity for communication and initial development stages. For further insights and practical implementations, consider exploring resources on the Enterprise DNA Platform.