WebFM/src/core/forms.py

from flask_wtf import FlaskForm
from wtforms import StringField, PasswordField, SubmitField
from wtforms.validators import DataRequired, Length, Email, EqualTo, ValidationError
from core import User


class RegisterForm(FlaskForm):
    username = StringField('Username', validators=[DataRequired(), Length(min=4, max=24)])
    email    = StringField('Email', validators=[DataRequired(), Email()])
    password = PasswordField('Password', validators=[DataRequired(), Length(min=8)])
    confirm_password = PasswordField('Confirm Password',
                                        validators=[DataRequired(), EqualTo('password', message="Passwords must match!")])
    submit   = SubmitField("Sign Up")

    def validate_username(self, username):
        user = User.query.filter_by(username=username.data).first()
        if user:
            raise ValidationError("User exists already! Please use a different name!")


class LoginForm(FlaskForm):
    username = StringField('Username', validators=[DataRequired(), Length(min=4, max=24)])
    password = PasswordField('Password', validators=[DataRequired(), Length(min=8, max=32)])
    submit   = SubmitField("Login")