E-commerce.py

# e-commerce.py

from flask import Flask, render_template, request, redirect, url_for, flash
from flask_sqlalchemy import SQLAlchemy
from flask_login import LoginManager, UserMixin, login_user, logout_user, current_user, login_required

app = Flask(__name__)
app.config['SQLALCHEMY_DATABASE_URI'] = 'sqlite:///site.db'
app.config['SECRET_KEY'] = 'your_secret_key'
db = SQLAlchemy(app)
login_manager = LoginManager(app)
login_manager.login_view = 'login'

class User(UserMixin, db.Model):
    id = db.Column(db.Integer, primary_key=True)
    username = db.Column(db.String(20), unique=True, nullable=False)
    email = db.Column(db.String(120), unique=True, nullable=False)
    password = db.Column(db.String(60), nullable=False)

class Product(db.Model):
    id = db.Column(db.Integer, primary_key=True)
    name = db.Column(db.String(100), nullable=False)
    description = db.Column(db.Text, nullable=False)
    price = db.Column(db.Float, nullable=False)

@login_manager.user_loader
def load_user(user_id):
    return User.query.get(int(user_id))

@app.route('/')
def home():
    products = Product.query.all()
    return render_template('home.html', products=products)

@app.route('/login', methods=['GET', 'POST'])
def login():
    if current_user.is_authenticated:
        return redirect(url_for('home'))
    if request.method == 'POST':
        user = User.query.filter_by(email=request.form['email']).first()
        if user and user.password == request.form['password']:
            login_user(user)
            next_page = request.args.get('next')
            return redirect(next_page) if next_page else redirect(url_for('home'))
        else:
            flash('Login unsuccessful. Please check email and password.', 'danger')
    return render_template('login.html')

@app.route('/logout')
def logout():
    logout_user()
    return redirect(url_for('home'))

@app.route('/register', methods=['GET', 'POST'])
def register():
    if current_user.is_authenticated:
        return redirect(url_for('home'))
    if request.method == 'POST':
        user = User(username=request.form['username'], email=request.form['email'], password=request.form['password'])
        db.session.add(user)
        db.session.commit()
        flash('Your account has been created! You are now able to log in.', 'success')
        return redirect(url_for('login'))
    return render_template('register.html')

@app.route('/product/<int:product_id>')
@login_required
def product(product_id):
    product = Product.query.get_or_404(product_id)
    return render_template('product.html', product=product)

@app.route('/order', methods=['POST'])
@login_required
def order():
    # Handle order processing logic here
    return redirect(url_for('home'))

if __name__ == '__main__':
    app.run(debug=True)