149 lines
4.6 KiB
Python
149 lines
4.6 KiB
Python
from django.db import models
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from django.utils import timezone
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from django.utils.translation import ugettext_lazy as _
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from . import settings
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class BillManager(models.Manager):
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def get_queryset(self):
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queryset = super(BillManager, self).get_queryset()
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if self.model != Bill:
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bill_type = self.model.get_type()
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queryset = queryset.filter(bill_type=bill_type)
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return queryset
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class Bill(models.Model):
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OPEN = 'OPEN'
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CLOSED = 'CLOSED'
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SEND = 'SEND'
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RETURNED = 'RETURNED'
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PAID = 'PAID'
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BAD_DEBT = 'BAD_DEBT'
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STATUSES = (
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(OPEN, _("Open")),
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(CLOSED, _("Closed")),
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(SEND, _("Sent")),
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(RETURNED, _("Returned")),
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(PAID, _("Paid")),
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(BAD_DEBT, _("Bad debt")),
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)
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TYPES = (
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('INVOICE', _("Invoice")),
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('AMENDMENTINVOICE', _("Amendment invoice")),
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('FEE', _("Fee")),
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('AMENDMENTFEE', _("Amendment Fee")),
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('BUDGET', _("Budget")),
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)
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ident = models.CharField(_("identifier"), max_length=16, unique=True,
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blank=True)
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account = models.ForeignKey('accounts.Account', verbose_name=_("account"),
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related_name='%(class)s')
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bill_type = models.CharField(_("type"), max_length=16, choices=TYPES)
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status = models.CharField(_("status"), max_length=16, choices=STATUSES,
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default=OPEN)
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created_on = models.DateTimeField(_("created on"), auto_now_add=True)
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due_on = models.DateTimeField(_("due on"), null=True, blank=True)
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last_modified_on = models.DateTimeField(_("last modified on"), auto_now=True)
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#base = models.DecimalField(max_digits=12, decimal_places=2)
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#tax = models.DecimalField(max_digits=12, decimal_places=2)
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comments = models.TextField(_("comments"), blank=True)
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# TODO rename to HTML-agnostic term like.. RAW ?
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html = models.TextField(_("HTML"), blank=True)
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objects = BillManager()
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def __unicode__(self):
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return self.ident
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@classmethod
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def get_type(cls):
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return cls.__name__.upper()
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def set_ident(self):
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cls = type(self)
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bill_type = self.bill_type or cls.get_type()
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if bill_type == 'BILL':
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raise TypeError("get_new_ident() can not be used on a Bill class")
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# Bill number resets every natural year
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year = timezone.now().strftime("%Y")
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bills = cls.objects.filter(created_on__year=year)
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number_length = settings.BILLS_IDENT_NUMBER_LENGTH
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prefix = getattr(settings, 'BILLS_%s_IDENT_PREFIX' % bill_type)
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if self.status == self.OPEN:
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prefix = 'O{}'.format(prefix)
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bills = bills.filter(status=self.OPEN)
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num_bills = bills.order_by('-ident').first() or 0
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if num_bills is not 0:
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num_bills = int(num_bills.ident[-number_length:])
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else:
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bills = bills.exclude(status=self.OPEN)
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num_bills = bills.count()
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zeros = (number_length - len(str(num_bills))) * '0'
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number = zeros + str(num_bills + 1)
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self.ident = '{prefix}{year}{number}'.format(
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prefix=prefix, year=year, number=number)
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def save(self, *args, **kwargs):
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if not self.bill_type:
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self.bill_type = type(self).get_type()
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if not self.ident or (self.ident.startswith('O') and self.status != self.OPEN):
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self.set_ident()
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super(Bill, self).save(*args, **kwargs)
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class Invoice(Bill):
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class Meta:
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proxy = True
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class AmendmentInvoice(Bill):
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class Meta:
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proxy = True
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class Fee(Bill):
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class Meta:
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proxy = True
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class AmendmentFee(Bill):
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class Meta:
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proxy = True
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class Budget(Bill):
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class Meta:
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proxy = True
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class BaseBillLine(models.Model):
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bill = models.ForeignKey(Bill, verbose_name=_("bill"),
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related_name='%(class)ss')
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description = models.CharField(max_length=256)
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initial_date = models.DateTimeField()
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final_date = models.DateTimeField()
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price = models.DecimalField(max_digits=12, decimal_places=2)
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amount = models.IntegerField()
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tax = models.DecimalField(max_digits=12, decimal_places=2)
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class Meta:
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abstract = True
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class BudgetLine(BaseBillLine):
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pass
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class BillLine(BaseBillLine):
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order_id = models.PositiveIntegerField(blank=True)
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order_last_bill_date = models.DateTimeField(null=True)
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order_billed_until = models.DateTimeField(null=True)
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auto = models.BooleanField(default=False)
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amended_line = models.ForeignKey('self', verbose_name=_("amended line"),
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related_name='amendment_lines', null=True, blank=True)
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