calendar-social/calsocial/forms.py

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# Calendar.social
# Copyright (C) 2018 Gergely Polonkai
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with this program. If not, see <https://www.gnu.org/licenses/>.
"""Forms for Calendar.social
"""
from enum import Enum
from flask_babelex import lazy_gettext as _
from flask_security.forms import LoginForm as BaseLoginForm
from flask_wtf import FlaskForm
import pytz
from wtforms import BooleanField, PasswordField, SelectField, StringField
from wtforms.ext.dateutil.fields import DateTimeField
from wtforms.validators import DataRequired, Email, StopValidation, ValidationError
from wtforms.widgets import TextArea
from calsocial.models import EventVisibility, EVENT_VISIBILITY_TRANSLATIONS
class UsernameAvailable(object): # pylint: disable=too-few-public-methods
"""Checks if a username is available
"""
def __init__(self, message=None):
self.message = message
def __call__(self, form, field):
from sqlalchemy.orm.exc import NoResultFound
from calsocial.models import User
# If there is no data, we dont raise an error; its not the task of this validator to
# check the validity of the username
if not field.data:
return
try:
User.query.filter(User.username == field.data).one()
except NoResultFound:
return
if self.message is None:
message = field.gettext('This username is not available')
else:
message = self.message
field.errors[:] = []
raise StopValidation(message)
class EmailAvailable(object): # pylint: disable=too-few-public-methods
"""Checks if an email address is available
"""
def __init__(self, message=None):
self.message = message
def __call__(self, form, field):
from sqlalchemy.orm.exc import NoResultFound
from calsocial.models import User
# If there is no data, we dont raise an error; its not the task of this validator to
# check the validity of the username
if not field.data:
return
try:
User.query.filter(User.email == field.data).one()
except NoResultFound:
return
if self.message is None:
message = field.gettext('This email address can not be used')
else:
message = self.message
field.errors[:] = []
raise StopValidation(message)
class RegistrationForm(FlaskForm):
"""Registration form
"""
username = StringField(_('Username'), validators=[DataRequired(), UsernameAvailable()])
email = StringField(_('Email address'), validators=[Email(), EmailAvailable()])
password = PasswordField(_('Password'), validators=[DataRequired()])
password_retype = PasswordField(_('Password, once more'), validators=[DataRequired()])
def validate_password_retype(self, field):
"""Validate the ``password_retype`` field
Its value must match the ``password`` fields.
"""
if field.data != self.password.data:
raise ValidationError(_('The two passwords must match!'))
class TimezoneField(SelectField):
"""Field for selecting a time zone
Note: this field overrides whatever is passed to the ``choices`` parameter, and fills
``choices`` with the common timezones of pytz. In every other aspects, it behaves exactly
like `SelectField`.
"""
def __init__(self, *args, **kwargs):
self.data = None
kwargs.update({
'choices': [
(pytz.timezone(tz), tz.replace('_', ' '))
for tz in pytz.common_timezones
],
})
SelectField.__init__(self, *args, **kwargs)
def process_formdata(self, valuelist):
if not valuelist:
self.data = None
return
try:
self.data = pytz.timezone(valuelist[0])
except pytz.exceptions.UnknownTimeZoneError:
self.data = None
raise ValueError('Unknown time zone')
@staticmethod
def is_pytz_instance(value):
"""Check if ``value`` is a valid pytz time zone instance
"""
return value is pytz.UTC or isinstance(value, pytz.tzinfo.BaseTzInfo)
def process_data(self, value):
if value is None:
self.data = None
return
if self.is_pytz_instance(value):
self.data = value
return
try:
self.data = pytz.timezone(value)
except pytz.exceptions.UnknownTimeZoneError:
raise ValueError(f'Unknown time zone {value}')
def iter_choices(self):
for value, label in self.choices:
yield (value, label, value == self.data)
class EnumField(SelectField):
"""Field that allows selecting one value from an ``Enum`` class
:param enum_type: an ``Enum`` type
:type enum_type: type(Enum)
:param translations: translatable labels for enum values
:type translations: dict
:param args: passed verbatim to the constructor of `SelectField`
:param kwargs: passed verbatim to the constructor of `SelectField`
"""
def __init__(self, enum_type, translations, *args, **kwargs):
if not issubclass(enum_type, Enum):
raise TypeError('enum_type must be a subclass of Enum')
kwargs.update({'choices': [(value, None) for value in enum_type]})
self.data = None
self.enum_type = enum_type
self.translations = translations
SelectField.__init__(self, *args, **kwargs)
def process_formdata(self, valuelist):
if not valuelist:
self.data = None
return
try:
self.data = self.enum_type[valuelist[0]]
except KeyError:
raise ValueError('Unknown value')
def iter_choices(self):
for value in self.enum_type:
label = self.gettext(self.translations[value]) if self.translations else value.name
yield (value.name, label, value == self.data)
class EventForm(FlaskForm):
"""Form for event creation/editing
"""
title = StringField(_('Title'), validators=[DataRequired()])
time_zone = TimezoneField(_('Time zone'), validators=[DataRequired()])
start_time = DateTimeField(_('Start time'), validators=[DataRequired()])
end_time = DateTimeField(_('End time'), validators=[DataRequired()])
all_day = BooleanField(_('All day'))
description = StringField(_('Description'), widget=TextArea())
visibility = EnumField(EventVisibility, EVENT_VISIBILITY_TRANSLATIONS, label=_('Visibility'))
def __init__(self, *args, **kwargs):
from flask_security import current_user
self.time_zone.kwargs['default'] = current_user.timezone # pylint: disable=no-member
FlaskForm.__init__(self, *args, **kwargs)
def populate_obj(self, obj):
"""Populate ``obj`` with event data
"""
FlaskForm.populate_obj(self, obj)
timezone = self.time_zone.data
obj.time_zone = str(timezone)
obj.start_time = timezone.localize(self.start_time.data).astimezone(pytz.utc)
obj.end_time = timezone.localize(self.end_time.data).astimezone(pytz.utc)
def validate_end_time(self, field):
"""Validate the ``end_time`` field
Its value must be later than the value of the ``start_time`` field.
"""
if field.data < self.start_time.data:
raise ValidationError(_('End time must be later than start time!'))
class SettingsForm(FlaskForm):
"""Form for user settings
"""
timezone = TimezoneField(_('Time zone'), validators=[DataRequired()])
def __init__(self, user, *args, **kwargs):
self.user = user
kwargs.setdefault('timezone', user.timezone)
FlaskForm.__init__(self, *args, **kwargs)
def populate_obj(self, user):
"""Populate ``obj`` with event data
"""
for name, field in self._fields.items():
if not (hasattr(self.__class__, name) and not hasattr(FlaskForm, name)):
continue
user.settings[name] = str(field.data)
class LoginForm(BaseLoginForm):
"""Login form for Calendar.social
"""
email = StringField(_('Username or email'), validators=[DataRequired()])
def __init__(self, *args, **kwargs):
super(LoginForm, self).__init__(*args, **kwargs)
self.user = None
def validate(self):
from flask_security.utils import _datastore
from flask_security.utils import verify_and_update_password
from .models import AuditLog
ret = super(LoginForm, self).validate()
if self.user is None:
self.user = _datastore.get_user(self.email.data)
if self.user is None:
# We cant figure out the user thats trying to log in, just return
return ret
if not verify_and_update_password(self.password.data, self.user):
AuditLog.log(self.user, AuditLog.TYPE_LOGIN_FAIL)
return ret
class ProfileField(StringField):
"""Input field for profiles
"""
def process_formdata(self, valuelist):
from sqlalchemy.orm.exc import NoResultFound
from .models import User, Profile
if not valuelist:
self.data = None
return
value = valuelist[0]
if value.startswith('@'):
value = value[1:]
try:
self.data = Profile.query.join(User).filter(User.username == value).one()
except NoResultFound:
self.data = None
raise ValueError('Unknown user')
def _value(self):
if self.data:
return self.data.fqn
return ''
class InviteForm(FlaskForm):
"""Form for event invitations
"""
invitee = ProfileField(validators=[DataRequired()])
def __init__(self, event, *args, **kwargs):
FlaskForm.__init__(self, *args, **kwargs)
self.event = event
def validate_invitee(self, field):
"""Validate the value of the invitee field
:raises ValidationError: If the given user is already invited
"""
from sqlalchemy.orm.exc import NoResultFound
from .models import Invitation
try:
Invitation.query \
.filter(Invitation.event == self.event) \
.filter(Invitation.invitee == field.data) \
.one()
raise ValidationError(_('User is already invited'))
except NoResultFound:
pass
class FirstStepsForm(FlaskForm):
"""Form for the initial profile setup
"""
display_name = StringField(
label=_('Display name'),
validators=[DataRequired()],
# pylint: disable=line-too-long
description=_('This will be shown to other users as your name. You can use your real name, or any nickname you like.'))
time_zone = TimezoneField(
label=_('Your time zone'),
validators=[DataRequired()],
description=_('The start and end times of events will be displayed in this time zone.'))
class ProfileForm(FlaskForm):
"""Form for editing a user profile
"""
display_name = StringField(label=_('Display name'), validators=[DataRequired()])
locked = BooleanField(label=_('Lock profile'))
def __init__(self, profile, *args, **kwargs):
kwargs.update({'display_name': profile.display_name})
kwargs.update({'locked': profile.locked})
FlaskForm.__init__(self, *args, **kwargs)
self.profile = profile