Create Login-System.py

Author: rogers-cyber

20-Simple-login-system/Login-System.py

@@ -0,0 +1,138 @@
+import tkinter as tk
+from tkinter import messagebox
+import hashlib
+import json
+import os
+
+USER_FILE = 'users.json'
+
+def load_users():
+    if os.path.exists(USER_FILE):
+        with open(USER_FILE, 'r') as f:
+            return json.load(f)
+    return {}
+
+def save_users(users):
+    with open(USER_FILE, 'w') as f:
+        json.dump(users, f)
+
+def hash_password(password):
+    return hashlib.sha256(password.encode()).hexdigest()
+
+class LoginApp:
+    def __init__(self, root):
+        self.root = root
+        self.root.title('Modern Login System')
+        self.root.geometry('450x550')
+        self.root.configure(bg='#1f2f3a')
+        self.root.resizable(False, False)
+        self.users = load_users()
+        self.create_login_screen()
+
+    def clear_screen(self):
+        for widget in self.root.winfo_children():
+            widget.destroy()
+
+    def create_login_screen(self):
+        self.clear_screen()
+        tk.Label(self.root, text='Welcome Back!', font=('Helvetica', 28, 'bold'), bg='#1f2f3a', fg='#ffffff').pack(pady=30)
+
+        # Username input
+        username_frame = tk.Frame(self.root, bg='#1f2f3a')
+        username_frame.pack(pady=10)
+        tk.Label(username_frame, text='Username', font=('Helvetica', 12), bg='#1f2f3a', fg='#bdc3c7').pack(anchor='w')
+        self.username_entry = tk.Entry(username_frame, font=('Helvetica', 14), bd=0, highlightthickness=2, highlightbackground='#2980b9', width=30)
+        self.username_entry.pack(pady=5, ipady=6)  # ipady increases vertical padding inside entry
+
+        # Password input
+        password_frame = tk.Frame(self.root, bg='#1f2f3a')
+        password_frame.pack(pady=10)
+        tk.Label(password_frame, text='Password', font=('Helvetica', 12), bg='#1f2f3a', fg='#bdc3c7').pack(anchor='w')
+        self.password_entry = tk.Entry(password_frame, font=('Helvetica', 14), bd=0, highlightthickness=2, highlightbackground='#2980b9', show='*', width=30)
+        self.password_entry.pack(pady=5, ipady=6)
+
+        # Buttons
+        btn_frame = tk.Frame(self.root, bg='#1f2f3a')
+        btn_frame.pack(pady=20)
+
+        login_btn = tk.Button(btn_frame, text='Login', command=self.login, bg='#2980b9', fg='white', font=('Helvetica', 12, 'bold'), width=25, height=2, bd=0, activebackground='#3498db', cursor='hand2')
+        login_btn.pack(pady=5)
+        register_btn = tk.Button(btn_frame, text='Register', command=self.create_register_screen, bg='#27ae60', fg='white', font=('Helvetica', 12, 'bold'), width=25, height=2, bd=0, activebackground='#2ecc71', cursor='hand2')
+        register_btn.pack(pady=5)
+        forgot_btn = tk.Button(btn_frame, text='Forgot Password?', command=self.forgot_password, bg='#e67e22', fg='white', font=('Helvetica', 12, 'bold'), width=25, height=2, bd=0, activebackground='#f39c12', cursor='hand2')
+        forgot_btn.pack(pady=5)
+
+    def create_register_screen(self):
+        self.clear_screen()
+        tk.Label(self.root, text='Create Account', font=('Helvetica', 28, 'bold'), bg='#1f2f3a', fg='#ffffff').pack(pady=30)
+
+        # Username
+        username_frame = tk.Frame(self.root, bg='#1f2f3a')
+        username_frame.pack(pady=10)
+        tk.Label(username_frame, text='Username', font=('Helvetica', 12), bg='#1f2f3a', fg='#bdc3c7').pack(anchor='w')
+        self.reg_username = tk.Entry(username_frame, font=('Helvetica', 14), bd=0, highlightthickness=2, highlightbackground='#27ae60', width=30)
+        self.reg_username.pack(pady=5, ipady=6)
+
+        # Password
+        password_frame = tk.Frame(self.root, bg='#1f2f3a')
+        password_frame.pack(pady=10)
+        tk.Label(password_frame, text='Password', font=('Helvetica', 12), bg='#1f2f3a', fg='#bdc3c7').pack(anchor='w')
+        self.reg_password = tk.Entry(password_frame, font=('Helvetica', 14), bd=0, highlightthickness=2, highlightbackground='#27ae60', show='*', width=30)
+        self.reg_password.pack(pady=5, ipady=6)
+
+        # Confirm Password
+        confirm_frame = tk.Frame(self.root, bg='#1f2f3a')
+        confirm_frame.pack(pady=10)
+        tk.Label(confirm_frame, text='Confirm Password', font=('Helvetica', 12), bg='#1f2f3a', fg='#bdc3c7').pack(anchor='w')
+        self.reg_confirm = tk.Entry(confirm_frame, font=('Helvetica', 14), bd=0, highlightthickness=2, highlightbackground='#27ae60', show='*', width=30)
+        self.reg_confirm.pack(pady=5, ipady=6)
+
+        # Buttons
+        btn_frame = tk.Frame(self.root, bg='#1f2f3a')
+        btn_frame.pack(pady=20)
+
+        register_btn = tk.Button(btn_frame, text='Register', command=self.register, bg='#27ae60', fg='white', font=('Helvetica', 12, 'bold'), width=25, height=2, bd=0, activebackground='#2ecc71', cursor='hand2')
+        register_btn.pack(pady=5)
+        back_btn = tk.Button(btn_frame, text='Back to Login', command=self.create_login_screen, bg='#c0392b', fg='white', font=('Helvetica', 12, 'bold'), width=25, height=2, bd=0, activebackground='#e74c3c', cursor='hand2')
+        back_btn.pack(pady=5)
+
+    def login(self):
+        username = self.username_entry.get()
+        password = self.password_entry.get()
+        hashed = hash_password(password)
+        if username in self.users and self.users[username] == hashed:
+            messagebox.showinfo('Success', f'Welcome {username}!')
+        else:
+            messagebox.showerror('Error', 'Invalid username or password')
+
+    def register(self):
+        username = self.reg_username.get()
+        password = self.reg_password.get()
+        confirm = self.reg_confirm.get()
+
+        if not username or not password:
+            messagebox.showerror('Error', 'All fields are required')
+            return
+        if password != confirm:
+            messagebox.showerror('Error', 'Passwords do not match')
+            return
+        if username in self.users:
+            messagebox.showerror('Error', 'Username already exists')
+            return
+
+        self.users[username] = hash_password(password)
+        save_users(self.users)
+        messagebox.showinfo('Success', 'Registration successful!')
+        self.create_login_screen()
+
+    def forgot_password(self):
+        username = self.username_entry.get()
+        if username in self.users:
+            messagebox.showinfo('Password Reset', f'Password reset link sent to {username} (mock)')
+        else:
+            messagebox.showerror('Error', 'Username not found')
+
+if __name__ == '__main__':
+    root = tk.Tk()
+    app = LoginApp(root)
+    root.mainloop()