Pseudo Code for Simple Sign Up Function

Overview

This pseudo code outlines a simple sign-up function that connects to a database to register a new user. The function collects user information, validates it, ensures the username is unique, and then inserts the data into the database.

Key Components

1. Input Collection: Gather user information (username, password, email).
2. Validation: Ensure input criteria are met (e.g., valid email format, password strength).
3. Database Connection: Connect to the database.
4. Check for Existing User: Verify that the username or email does not already exist.
5. Insert Data: If checks are successful, insert the new user data into the database.
6. Success/Failure Response: Provide feedback to the user based on the operation's outcome.

Pseudo Code

FUNCTION signUp(username, password, email):
    // Step 1: Validate input
    IF NOT isValidUsername(username):
        RETURN "Invalid username format"
        
    IF NOT isValidPassword(password):
        RETURN "Password does not meet criteria"
        
    IF NOT isValidEmail(email):
        RETURN "Invalid email format"

    // Step 2: Connect to database
    databaseConnection = connectToDatabase()

    // Step 3: Check for existing username or email
    IF userExists(databaseConnection, username, email):
        RETURN "Username or email already in use"

    // Step 4: Insert new user data
    hashedPassword = hashPassword(password)
    insertUser(databaseConnection, username, hashedPassword, email)

    // Step 5: Close database connection
    closeDatabaseConnection(databaseConnection)

    // Step 6: Return success message
    RETURN "User registration successful"

// Helper functions
FUNCTION isValidUsername(username):
    // Check if username meets length and character criteria
    RETURN (length(username) >= 3 AND length(username) <= 20 AND isAlphanumeric(username))

FUNCTION isValidPassword(password):
    // Check if password meets strength requirements
    RETURN (length(password) >= 8 AND containsUppercase(password) AND containsNumber(password))

FUNCTION isValidEmail(email):
    // Use regular expression to validate email
    RETURN (email matches emailRegexPattern)

FUNCTION userExists(dbConnection, username, email):
    // Query database to check if username or email exists
    query = "SELECT COUNT(*) FROM users WHERE username = username OR email = email"
    result = executeQuery(dbConnection, query)
    RETURN (result > 0)

FUNCTION insertUser(dbConnection, username, password, email):
    // Prepare insert statement to add new user
    query = "INSERT INTO users (username, password, email) VALUES (?, ?, ?)"
    executeInsert(dbConnection, query, username, password, email)

FUNCTION hashPassword(password):
    // Use hashing function to securely hash password
    RETURN hashedPassword

FUNCTION connectToDatabase():
    // Connect to the database and return the connection object
    RETURN databaseConnectionObject

FUNCTION closeDatabaseConnection(dbConnection):
    // Close the database connection
    dbConnection.close()

Conclusion

This pseudo code describes a straightforward sign-up process while maintaining clarity and simplicity. Each step is well-defined, ensuring that developers can readily follow the logic and implement it in an actual programming language. For in-depth learning about database interactions and user authentication techniques, consider exploring the courses available on the Enterprise DNA Platform.