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re2o/cotisations/payment_methods/forms.py
2018-08-18 13:20:22 +02:00

114 lines
4.3 KiB
Python

# -*- mode: python; coding: utf-8 -*-
# Re2o est un logiciel d'administration développé initiallement au rezometz. Il
# se veut agnostique au réseau considéré, de manière à être installable en
# quelques clics.
#
# Copyright © 2018 Hugo Levy-Falk
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 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 General Public License for more details.
#
# You should have received a copy of the GNU General Public License along
# with this program; if not, write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
from django import forms
from django.utils.translation import ugettext_lazy as _
from . import PAYMENT_METHODS
from cotisations.utils import find_payment_method
def payment_method_factory(payment, *args, creation=True, **kwargs):
"""This function finds the right payment method form for a given payment.
If the payment has a payment method, returns a ModelForm of it. Else if
it is the creation of the payment, a `PaymentMethodForm`.
Else `None`.
Args:
payment: The payment
*args: arguments passed to the form
creation: Should be True if you are creating the payment
**kwargs: passed to the form
Returns:
A form or None
"""
payment_method = kwargs.pop('instance', find_payment_method(payment))
if payment_method is not None:
return forms.modelform_factory(type(payment_method), fields='__all__')(
*args,
instance=payment_method,
**kwargs
)
elif creation:
return PaymentMethodForm(*args, **kwargs)
class PaymentMethodForm(forms.Form):
"""A special form which allows you to add a payment method to a `Payment`
object.
"""
payment_method = forms.ChoiceField(
label=_("Special payment method"),
help_text=_("Warning: you will not be able to change the payment "
"method later. But you will be allowed to edit the other "
"options."
),
required=False
)
def __init__(self, *args, **kwargs):
super(PaymentMethodForm, self).__init__(*args, **kwargs)
prefix = kwargs.get('prefix', None)
self.fields['payment_method'].choices = [(i,p.NAME) for (i,p) in enumerate(PAYMENT_METHODS)]
self.fields['payment_method'].choices.insert(0, ('', _('no')))
self.fields['payment_method'].widget.attrs = {
'id': 'paymentMethodSelect'
}
self.templates = [
forms.modelform_factory(p.PaymentMethod, fields='__all__')(prefix=prefix)
for p in PAYMENT_METHODS
]
def clean(self):
"""A classic `clean` method, except that it replaces
`self.payment_method` by the payment method object if one has been
found. Tries to call `payment_method.valid_form` if it exists.
"""
super(PaymentMethodForm, self).clean()
choice = self.cleaned_data['payment_method']
if choice=='':
return
choice = int(choice)
model = PAYMENT_METHODS[choice].PaymentMethod
form = forms.modelform_factory(model, fields='__all__')(self.data, prefix=self.prefix)
self.payment_method = form.save(commit=False)
if hasattr(self.payment_method, 'valid_form'):
self.payment_method.valid_form(self)
return self.cleaned_data
def save(self, payment, *args, **kwargs):
"""Saves the payment method.
Tries to call `payment_method.alter_payment` if it exists.
"""
commit = kwargs.pop('commit', True)
if not hasattr(self, 'payment_method'):
return None
self.payment_method.payment = payment
if hasattr(self.payment_method, 'alter_payment'):
self.payment_method.alter_payment(payment)
if commit:
payment.save()
self.payment_method.save()
return self.payment_method