from django.core.urlresolvers import reverse from django.core.exceptions import ValidationError from django.db.models import Count from django.db import models from django.conf import settings from django.utils.translation import ugettext_lazy as _ from django.template import defaultfilters from decimal import Decimal from core.models import User, SithFile from club.models import Club class CurrencyField(models.DecimalField): """ This is a custom database field used for currency """ __metaclass__ = models.SubfieldBase def __init__(self, *args, **kwargs): kwargs['max_digits'] = 12 kwargs['decimal_places'] = 2 super(CurrencyField, self).__init__(*args, **kwargs) def to_python(self, value): try: return super(CurrencyField, self).to_python(value).quantize(Decimal("0.01")) except AttributeError: return None # Accounting classes class Company(models.Model): name = models.CharField(_('name'), max_length=60) class Meta: verbose_name = _("company") def get_absolute_url(self): return reverse('accounting:co_edit', kwargs={'co_id': self.id}) def get_display_name(self): return self.name class BankAccount(models.Model): name = models.CharField(_('name'), max_length=30) iban = models.CharField(_('iban'), max_length=255, blank=True) number = models.CharField(_('account number'), max_length=255, blank=True) club = models.ForeignKey(Club, related_name="bank_accounts") def is_owned_by(self, user): """ Method to see if that object can be edited by the given user """ if user.is_in_group(settings.SITH_GROUPS['accounting-admin']['name']): return True m = self.club.get_membership_for(user) if m is not None and m.role >= 7: return True return False def get_absolute_url(self): return reverse('accounting:bank_details', kwargs={'b_account_id': self.id}) def __str__(self): return self.name class ClubAccount(models.Model): name = models.CharField(_('name'), max_length=30) club = models.OneToOneField(Club, related_name="club_account") bank_account = models.ForeignKey(BankAccount, related_name="club_accounts") def is_owned_by(self, user): """ Method to see if that object can be edited by the given user """ if user.is_in_group(settings.SITH_GROUPS['accounting-admin']['name']): return True return False def can_be_edited_by(self, user): """ Method to see if that object can be edited by the given user """ m = self.club.get_membership_for(user) if m is not None and m.role >= 7: return True return False def has_open_journal(self): for j in self.journals.all(): if not j.closed: return True return False def get_absolute_url(self): return reverse('accounting:club_details', kwargs={'c_account_id': self.id}) def __str__(self): return self.name def get_display_name(self): return _("%(club_account)s on %(bank_account)s") % {"club_account": self.name, "bank_account": self.bank_account} class GeneralJournal(models.Model): """ Class storing all the operations for a period of time """ start_date = models.DateField(_('start date')) end_date = models.DateField(_('end date'), null=True, blank=True, default=None) name = models.CharField(_('name'), max_length=30) closed = models.BooleanField(_('is closed'), default=False) club_account = models.ForeignKey(ClubAccount, related_name="journals", null=False) amount = CurrencyField(_('amount'), default=0) effective_amount = CurrencyField(_('effective_amount'), default=0) def is_owned_by(self, user): """ Method to see if that object can be edited by the given user """ if user.is_in_group(settings.SITH_GROUPS['accounting-admin']['name']): return True if self.club_account.can_be_edited_by(user): return True return False def get_absolute_url(self): return reverse('accounting:journal_details', kwargs={'j_id': self.id}) def __str__(self): return self.name def update_amounts(self): self.amount = 0 self.effective_amount = 0 for o in self.operations.all(): if o.accounting_type.movement_type == "credit": if o.done: self.effective_amount += o.amount self.amount += o.amount else: if o.done: self.effective_amount -= o.amount self.amount -= o.amount self.save() class Operation(models.Model): """ An operation is a line in the journal, a debit or a credit """ number = models.IntegerField(_('number')) journal = models.ForeignKey(GeneralJournal, related_name="operations", null=False) amount = CurrencyField(_('amount')) date = models.DateField(_('date')) label = models.CharField(_('label'), max_length=50) remark = models.TextField(_('remark'), max_length=255) mode = models.CharField(_('payment method'), max_length=255, choices=settings.SITH_ACCOUNTING_PAYMENT_METHOD) cheque_number = models.IntegerField(_('cheque number'), default=-1) invoice = models.ForeignKey(SithFile, related_name='operations', verbose_name=_("invoice"), null=True, blank=True) done = models.BooleanField(_('is done'), default=False) accounting_type = models.ForeignKey('AccountingType', related_name="operations", verbose_name=_("accounting type")) target_type = models.CharField(_('target type'), max_length=10, choices=[('USER', _('User')), ('CLUB', _('Club')), ('ACCOUNT', _('Account')), ('COMPANY', _('Company')), ('OTHER', _('Other'))]) target_id = models.IntegerField(_('target id'), null=True, blank=True) target_label = models.CharField(_('target label'), max_length=32, default="", blank=True) class Meta: unique_together = ('number', 'journal') ordering = ['-number'] def __getattribute__(self, attr): if attr == "target": return self.get_target() else: return object.__getattribute__(self, attr) def clean(self): super(Operation, self).clean() if self.date < self.journal.start_date: raise ValidationError(_("""The date can not be before the start date of the journal, which is %(start_date)s.""") % {'start_date': defaultfilters.date(self.journal.start_date, settings.DATE_FORMAT)}) if self.target_type != "OTHER" and self.get_target() is None: raise ValidationError(_("Target does not exists")) if self.target_type == "OTHER" and self.target_label == "": raise ValidationError(_("Please add a target label if you set no existing target")) def get_target(self): tar = None if self.target_type == "USER": tar = User.objects.filter(id=self.target_id).first() elif self.target_type == "CLUB": tar = Club.objects.filter(id=self.target_id).first() elif self.target_type == "ACCOUNT": tar = ClubAccount.objects.filter(id=self.target_id).first() elif self.target_type == "COMPANY": tar = Company.objects.filter(id=self.target_id).first() return tar def save(self): if self.number is None: self.number = self.journal.operations.count() + 1 super(Operation, self).save() self.journal.update_amounts() def is_owned_by(self, user): """ Method to see if that object can be edited by the given user """ if user.is_in_group(settings.SITH_GROUPS['accounting-admin']['name']): return True if self.journal.closed: return False m = self.journal.club_account.club.get_membership_for(user) if m is not None and m.role >= 7: return True return False def can_be_edited_by(self, user): """ Method to see if that object can be edited by the given user """ if self.is_owned_by(user): return True return False def get_absolute_url(self): return reverse('accounting:journal_details', kwargs={'j_id': self.journal.id}) def __str__(self): return "%d € | %s | %s | %s" % ( self.amount, self.date, self.accounting_type, self.done, ) class AccountingType(models.Model): """ Class describing the accounting types. Thoses are numbers used in accounting to classify operations """ code = models.CharField(_('code'), max_length=16) # TODO: add number validator label = models.CharField(_('label'), max_length=60) movement_type = models.CharField(_('movement type'), choices=[('credit', 'Credit'), ('debit', 'Debit'), ('neutral', 'Neutral')], max_length=12) class Meta: verbose_name = _("accounting type") def is_owned_by(self, user): """ Method to see if that object can be edited by the given user """ if user.is_in_group(settings.SITH_GROUPS['accounting-admin']['name']): return True return False def get_absolute_url(self): return reverse('accounting:type_list') def __str__(self): return self.movement_type+" - "+self.code+" - "+self.label