App.py

from flask import Flask, request, jsonify, render_template
from flask_cors import CORS
from flask_sqlalchemy import SQLAlchemy


app = Flask(__name__)
CORS(app)
app.config['SQLALCHEMY_DATABASE_URI'] = 'sqlite:///contacts.db'
app.config['SQLALCHEMY_TRACK_MODIFICATIONS'] = False
db = SQLAlchemy(app)


class Contact(db.Model):
    id = db.Column(db.Integer, primary_key=True)
    name = db.Column(db.String(100), nullable=False)
    email = db.Column(db.String(100), unique=True, nullable=False)
    phone = db.Column(db.String(15), nullable=False)

    def to_dict(self):
        return {
            'id': self.id,
            'name': self.name,
            'email': self.email,
            'phone': self.phone
        }


with app.app_context():
    db.create_all()


# Defautl route for Index.html
@app.route("/")
def index():
    return render_template("index.html")


@app.route('/contacts', methods=['POST'])
def add_contact():
    data = request.get_json()
    new_contact = Contact(name=data['name'], email=data['email'], phone=data['phone'])
    db.session.add(new_contact)
    db.session.commit()
    return jsonify(new_contact.to_dict()), 201

@app.route('/contacts', methods=['GET'])
def get_contacts():
    contacts = Contact.query.all()
    return jsonify([contact.to_dict() for contact in contacts]), 200

@app.route('/contacts/<int:id>', methods=['GET'])
def get_contact(id):
    contact = Contact.query.get_or_404(id)
    return jsonify(contact.to_dict()), 200

@app.route('/contacts/<int:id>', methods=['PUT'])
def update_contact(id):
    data = request.get_json()
    contact = Contact.query.get_or_404(id)
    contact.name = data['name']
    contact.email = data['email']
    contact.phone = data['phone']
    db.session.commit()
    return jsonify(contact.to_dict()), 200

@app.route('/contacts/<int:id>', methods=['DELETE'])
def delete_contact(id):
    contact = Contact.query.get_or_404(id)
    db.session.delete(contact)
    db.session.commit()
    return jsonify({"message": "Contact deleted"}), 204

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