272 lines
7 KiB
Python
272 lines
7 KiB
Python
# Copyright (C) 2018-2021 by BDE ENS Paris-Saclay
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# SPDX-License-Identifier: GPL-3.0-or-later
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import datetime
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from datetime import date
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from django.conf import settings
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from django.contrib.auth.models import User
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from django.core.exceptions import ValidationError
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from django.core.validators import MinValueValidator
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from django.db import models, transaction
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from django.db.models import Q
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from django.template.loader import render_to_string
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from django.utils import timezone
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from django.utils.translation import gettext_lazy as _
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from member.models import Club, Membership
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from note.models import NoteSpecial, SpecialTransaction, MembershipTransaction, NoteUser
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class Invoice(models.Model):
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"""
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An invoice model that can generates a true invoice.
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"""
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id = models.PositiveIntegerField(
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primary_key=True,
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verbose_name=_("Invoice identifier"),
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)
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bde = models.CharField(
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max_length=32,
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default='BDE',
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choices=(
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('BDE', 'BDE'),
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('BDA', 'BDA'),
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('BDS', 'BDS'),
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),
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verbose_name=_("BD?"),
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)
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object = models.CharField(
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max_length=255,
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verbose_name=_("Object"),
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)
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description = models.TextField(
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verbose_name=_("Description")
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)
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name = models.CharField(
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max_length=255,
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verbose_name=_("Name"),
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)
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address = models.TextField(
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verbose_name=_("Address"),
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)
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date = models.DateField(
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default=date.today,
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verbose_name=_("Date"),
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)
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acquitted = models.BooleanField(
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verbose_name=_("Acquitted"),
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default=False,
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)
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locked = models.BooleanField(
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verbose_name=_("Locked"),
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help_text=_("An invoice can't be edited when it is locked."),
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default=False,
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)
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tex = models.TextField(
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default="",
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verbose_name=_("tex source"),
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)
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@transaction.atomic
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def save(self, *args, **kwargs):
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"""
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When an invoice is generated, we store the tex source.
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The advantage is to never change the template.
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Warning: editing this model regenerate the tex source, so be careful.
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"""
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old_invoice = Invoice.objects.filter(id=self.id)
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if old_invoice.exists():
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if old_invoice.get().locked and not self._force_save:
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raise ValidationError(_("This invoice is locked and can no longer be edited."))
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products = self.products.all()
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self.place = "Bruz"
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self.my_name = f"{self.bde} ENS Rennes"
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self.my_address_street = "14 avenue Robert Schumann"
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self.my_city = "35170 Bruz"
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self.bank_code = 30003
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self.desk_code = 3894
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self.account_number = 37280662
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self.rib_key = 14
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self.bic = "SOGEFRPP"
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# Fill the template with the information
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self.tex = render_to_string("treasury/invoice_sample.tex", dict(obj=self, products=products))
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return super().save(*args, **kwargs)
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class Meta:
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verbose_name = _("invoice")
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verbose_name_plural = _("invoices")
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def __str__(self):
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return _("Invoice #{id}").format(id=self.id)
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class Product(models.Model):
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"""
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Product that appears on an invoice.
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"""
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invoice = models.ForeignKey(
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Invoice,
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on_delete=models.CASCADE,
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related_name="products",
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verbose_name=_("invoice"),
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)
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designation = models.CharField(
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max_length=255,
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verbose_name=_("Designation"),
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)
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quantity = models.DecimalField(
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decimal_places=2,
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max_digits=7,
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verbose_name=_("Quantity"),
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validators=[MinValueValidator(0)],
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)
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amount = models.IntegerField(
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verbose_name=_("Unit price"),
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)
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@property
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def amount_euros(self):
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return "{:.2f}".format(self.amount / 100)
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@property
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def total(self):
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return self.quantity * self.amount
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@property
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def total_euros(self):
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return "{:.2f}".format(self.total / 100)
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class Meta:
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verbose_name = _("product")
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verbose_name_plural = _("products")
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def __str__(self):
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return f"{self.designation} ({self.invoice})"
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class RemittanceType(models.Model):
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"""
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Store what kind of remittances can be stored.
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"""
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note = models.OneToOneField(
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NoteSpecial,
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on_delete=models.CASCADE,
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)
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def __str__(self):
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return str(self.note)
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class Meta:
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verbose_name = _("remittance type")
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verbose_name_plural = _("remittance types")
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class Remittance(models.Model):
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"""
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Treasurers want to regroup checks or bank transfers in bank remittances.
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"""
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date = models.DateTimeField(
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default=timezone.now,
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verbose_name=_("Date"),
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)
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remittance_type = models.ForeignKey(
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RemittanceType,
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on_delete=models.PROTECT,
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verbose_name=_("Type"),
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)
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comment = models.CharField(
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max_length=255,
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verbose_name=_("Comment"),
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)
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closed = models.BooleanField(
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default=False,
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verbose_name=_("Closed"),
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)
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class Meta:
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verbose_name = _("remittance")
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verbose_name_plural = _("remittances")
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@property
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def transactions(self):
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"""
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:return: Transactions linked to this remittance.
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"""
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if not self.pk:
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return SpecialTransaction.objects.none()
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return SpecialTransaction.objects.filter(specialtransactionproxy__remittance=self)
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def count(self):
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"""
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Linked transactions count.
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"""
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return self.transactions.count()
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@property
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def amount(self):
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"""
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Total amount of the remittance.
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"""
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return sum(transaction.total for transaction in self.transactions.all())
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@transaction.atomic
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def save(self, force_insert=False, force_update=False, using=None, update_fields=None):
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# Check if all transactions have the right type.
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if self.transactions.exists() and self.transactions.filter(~Q(source=self.remittance_type.note)).exists():
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raise ValidationError("All transactions in a remittance must have the same type")
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return super().save(force_insert, force_update, using, update_fields)
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def __str__(self):
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return _("Remittance #{:d}: {}").format(self.id, self.comment, )
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class SpecialTransactionProxy(models.Model):
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"""
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In order to keep modularity, we don't that the Note app depends on the treasury app.
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That's why we create a proxy in this app, to link special transactions and remittances.
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If it isn't very clean, it does what we want.
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"""
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transaction = models.OneToOneField(
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SpecialTransaction,
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on_delete=models.CASCADE,
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)
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remittance = models.ForeignKey(
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Remittance,
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on_delete=models.PROTECT,
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null=True,
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related_name="transaction_proxies",
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verbose_name=_("Remittance"),
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)
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class Meta:
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verbose_name = _("special transaction proxy")
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verbose_name_plural = _("special transaction proxies")
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def __str__(self):
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return str(self.transaction)
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