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app.py
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app.py
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from flask import Flask, render_template, url_for, redirect
from flask_sqlalchemy import SQLAlchemy
from flask_login import UserMixin, login_user, LoginManager, login_required, logout_user, current_user
from flask_wtf import FlaskForm
from wtforms import StringField, PasswordField, SubmitField
from wtforms.validators import InputRequired, Length, ValidationError
from flask_bcrypt import Bcrypt
app = Flask(__name__)
db = SQLAlchemy(app)
bcrypt = Bcrypt(app)
app.config['SQLALCHEMY_DATABASE_URI'] = 'sqlite:///database.db'
app.config['SECRET_KEY'] = 'thisisasecretkey'
login_manager = LoginManager()
login_manager.init_app(app)
login_manager.login_view = 'login'
@login_manager.user_loader
def load_user(user_id):
return User.query.get(int(user_id))
class User(db.Model, UserMixin):
id = db.Column(db.Integer, primary_key=True)
username = db.Column(db.String(20), nullable=False, unique=True)
password = db.Column(db.String(80), nullable=False)
class RegisterForm(FlaskForm):
username = StringField(validators=[
InputRequired(), Length(min=4, max=20)], render_kw={"placeholder": "Username"})
password = PasswordField(validators=[
InputRequired(), Length(min=8, max=20)], render_kw={"placeholder": "Password"})
submit = SubmitField('Register')
def validate_username(self, username):
existing_user_username = User.query.filter_by(
username=username.data).first()
if existing_user_username:
raise ValidationError(
'That username already exists. Please choose a different one.')
class LoginForm(FlaskForm):
username = StringField(validators=[
InputRequired(), Length(min=4, max=20)], render_kw={"placeholder": "Username"})
password = PasswordField(validators=[
InputRequired(), Length(min=8, max=20)], render_kw={"placeholder": "Password"})
submit = SubmitField('Login')
@app.route('/')
def home():
return render_template('home.html')
@app.route('/login', methods=['GET', 'POST'])
def login():
form = LoginForm()
if form.validate_on_submit():
user = User.query.filter_by(username=form.username.data).first()
if user:
if bcrypt.check_password_hash(user.password, form.password.data):
login_user(user)
return redirect(url_for('dashboard'))
return render_template('login.html', form=form)
@app.route('/dashboard', methods=['GET', 'POST'])
@login_required
def dashboard():
return render_template('dashboard.html')
@app.route('/logout', methods=['GET', 'POST'])
@login_required
def logout():
logout_user()
return redirect(url_for('login'))
@ app.route('/register', methods=['GET', 'POST'])
def register():
form = RegisterForm()
if form.validate_on_submit():
hashed_password = bcrypt.generate_password_hash(form.password.data)
new_user = User(username=form.username.data, password=hashed_password)
db.session.add(new_user)
db.session.commit()
return redirect(url_for('login'))
return render_template('register.html', form=form)
if __name__ == "__main__":
app.run(debug=True)