Login-and-Register-System-Using-Python

Login.And.Register.System.Using.Python.mp4

Summary

The code snippet is a class called Validate that provides methods for validating and managing user registration, login, and account deletion. It uses the bcrypt library for password hashing and the re library for email validation. The class also includes methods for updating a JSON file with user data and checking if a username already exists.

Example Usage

validateObj = Validate()
validateObj.register_user("john", "password123", "[email protected]")
validateObj.login_user("john", "password123")
validateObj.delete_account("john")

Modules Used

• questionary----> for creating interactive prompts and questionnaires
• json--------------> Used for parsing and generating JSON data
• rich.console---> enables rich text and beautiful formatting in the terminal
• time.sleep------> used to pause the execution of the script for a specified number of seconds.
• bcrypt------------> to build a cryptographic hash of passwords
• re------------------> used for searching, matching, and manipulating strings based on specific patterns

Code Analysis

Inputs

• username (string): The username entered by the user.
• password (string): The password entered by the user.
• email (string): The email entered by the user.

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Flow

1. The Validate class checks if the JSON file "data.json" exists. If not, it creates a new file with an empty "gamedata" dictionary.
2. The hash_password method takes a password as input, generates a salt, and hashes the password using bcrypt.
3. The update_json method updates the "gamedata" dictionary in the JSON file with the username, hashed password, and email.
4. The validate_username method checks if the username is valid (not empty and contains only lowercase letters) and if it already exists in the JSON file.
5. The validate_password method checks if the password meets certain criteria (minimum length, contains a number, lowercase letter, and uppercase letter).
6. The validate_email method uses a regular expression to validate the email format.
7. The register_user method validates the username, password, and email, hashes the password, and updates the JSON file with the user data.
8. The login_user method checks if the username exists in the JSON file, retrieves the hashed password, and compares it with the entered password using bcrypt.
9. The delete_account method checks if the username exists in the JSON file, deletes the user data from the "gamedata" dictionary, and updates the JSON file.
10. The register function prompts the user to enter a username, password, and email, validates the inputs, and calls the register_user method.
11. The login function prompts the user to enter a username and password, calls the login_user method, and displays a welcome message if successful.
12. The delete_account function prompts the user to enter a username and password, calls the login_user method to validate the credentials, and calls the delete_account method to delete the user account.

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Outputs

• The register_user method returns True if the registration is successful, and False if any validation error occurs.
• The login_user method returns True if the login is successful, and False if the username or password is incorrect.
• The delete_account method returns True if the account is successfully deleted, and False if the username is not found in the JSON file.

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