Add user registration endpoint with validation and JWT authentication

backend/app.py

@@ -3,6 +3,7 @@
 from flask_jwt_extended import JWTManager
 from flask_cors import CORS
 from backend.database import db, migrate
+from backend.routes.auth import auth_bp
 
 def create_app(config_class):
     app = Flask(__name__, 
@@ -26,9 +27,8 @@ def index():
     def api_status():
         return jsonify({'message': 'API is working', 'status': 'success'}), 200
 
-    # Register blueprints
-    from backend.routes.auth import auth_bp
-
+
+
 
     app.register_blueprint(auth_bp, url_prefix='/api/auth')
 

backend/routes/auth.py

@@ -2,33 +2,48 @@
 from flask_jwt_extended import create_access_token, jwt_required, get_jwt_identity
 from backend.models.user import User
 from backend.database import db
+import re
 
 auth_bp = Blueprint('auth', __name__)
 
+def is_password_strong(password):
+    return len(password) >= 6
 @auth_bp.route('/register', methods=['POST'])
 def register():
     data = request.get_json()
-
+
+    username = data.get('username')
+    email = data.get('email')
+    password = data.get('password')
     # Validate input
     if not data.get('username') or not data.get('email') or not data.get('password'):
         return jsonify({'error': 'Missing required fields'}), 400
 
+    # Check the format of email
+    if not re.match(r"[^@]+@[^@]+\.[^@]+", email):
+        return jsonify({'error': "Invalid Email format"}), 400
+
+    # check if password is strong or not 
+    if not is_password_strong(password):
+        return jsonify({'error': 'Password too weak (min 6 char)'}), 400
+
+
     # Check if user exists
     if User.query.filter_by(email=data['email']).first():
         return jsonify({'error': 'Email already registered'}), 400
 
     if User.query.filter_by(username=data['username']).first():
         return jsonify({'error': 'Username already taken'}), 400
 
-    # Create new user
-    user = User(username=data['username'], email=data['email'])
-    user.set_password(data['password'])
+
+    user = User(username=username, email=email)
+    user.set_password(password)
 
     db.session.add(user)
     db.session.commit()
 
     # Create access token
-    access_token = create_access_token(identity=user.id)
+    access_token = create_access_token(identity= user.id)
 
     return jsonify({
         'message': 'User created successfully',

run.py

@@ -1,8 +1,10 @@
 from backend.app import create_app
 from config import config
+from backend.routes.auth import auth_bp
 import os
 
 if __name__ == '__main__':
     config_name = os.environ.get('FLASK_ENV') or 'default'
     app = create_app(config[config_name])
     app.run(host='0.0.0.0', port=4000, debug=True)
+    app.register_blueprint(auth_bp)