1 # -*- coding: utf-8 -*-
2 # This file is part of Wolnelektury, licensed under GNU Affero GPLv3 or later.
3 # Copyright © Fundacja Nowoczesna Polska. See NOTICE for more information.
5 from datetime import date, datetime
6 from django.core.urlresolvers import reverse
7 from django.db import models
8 from django.utils.translation import ugettext_lazy as _, ugettext as __
10 from catalogue.models import Book
13 class Offer(models.Model):
14 """ A fundraiser for a particular book. """
15 author = models.CharField(_('author'), max_length=255)
16 title = models.CharField(_('title'), max_length=255)
17 slug = models.SlugField(_('slug'))
18 book = models.ForeignKey(Book, null=True, blank=True,
19 help_text=_('Published book.'))
20 redakcja_url = models.URLField(_('redakcja URL'), blank=True)
21 target = models.DecimalField(_('target'), decimal_places=2, max_digits=10)
22 start = models.DateField(_('start'))
23 end = models.DateField(_('end'))
24 due = models.DateField(_('due'),
25 help_text=_('When will it be published if the money is raised.'))
28 verbose_name = _('offer')
29 verbose_name_plural = _('offers')
32 def __unicode__(self):
33 return u"%s – %s" % (self.author, self.title)
35 def get_absolute_url(self):
36 return reverse('funding_offer', args=[self.slug])
39 return self.start <= date.today() <= self.end
43 """ Returns current fundraiser or None. """
45 objects = cls.objects.filter(start__lte=today, end__gte=today)
53 """ QuerySet for all current and past fundraisers. """
55 return cls.objects.filter(start__lte=today)
57 def get_perks(self, amount=None):
58 """ Finds all the perks for the offer.
60 If amount is provided, returns the perks you get for it.
63 perks = Perk.objects.filter(
64 models.Q(offer=self) | models.Q(offer=None)
65 ).exclude(end_date__lt=date.today())
66 if amount is not None:
67 perks = perks.filter(price__lte=amount)
70 def funding_payed(self):
71 """ QuerySet for all completed payments for the offer. """
72 return Funding.payed().filter(offer=self)
75 """ The money gathered. """
76 return self.funding_payed().aggregate(s=models.Sum('amount'))['s'] or 0
79 if self.sum() >= self.target:
81 elif self.start <= date.today() <= self.end:
87 class Perk(models.Model):
90 If no attached to a particular Offer, applies to all.
93 offer = models.ForeignKey(Offer, verbose_name=_('offer'), null=True, blank=True)
94 price = models.DecimalField(_('price'), decimal_places=2, max_digits=10)
95 name = models.CharField(_('name'), max_length=255)
96 description = models.TextField(_('description'), blank=True)
97 end_date = models.DateField(_('end date'), null=True, blank=True)
100 verbose_name = _('perk')
101 verbose_name_plural = _('perks')
102 ordering = ['-price']
104 def __unicode__(self):
105 return "%s (%s%s)" % (self.name, self.price, u" for %s" % self.offer if self.offer else "")
108 class Funding(models.Model):
109 """ A person paying in a fundraiser.
111 The payment was completed if and only if payed_at is set.
114 offer = models.ForeignKey(Offer, verbose_name=_('offer'))
115 name = models.CharField(_('name'), max_length=127, blank=True)
116 email = models.EmailField(_('email'), blank=True)
117 amount = models.DecimalField(_('amount'), decimal_places=2, max_digits=10)
118 payed_at = models.DateTimeField(_('payed at'), null=True, blank=True)
119 perks = models.ManyToManyField(Perk, verbose_name=_('perks'), blank=True)
121 # Any additional info needed for perks?
125 """ QuerySet for all completed payments. """
126 return cls.objects.exclude(payed_at=None)
129 verbose_name = _('funding')
130 verbose_name_plural = _('fundings')
131 ordering = ['-payed_at']
133 def __unicode__(self):
134 return unicode(self.offer)
136 def get_absolute_url(self):
137 return reverse('funding_funding', args=[self.pk])
139 # Register the Funding model with django-getpaid for payments.
140 getpaid.register_to_payment(Funding, unique=False, related_name='payment')
143 class Spent(models.Model):
144 """ Some of the remaining money spent on a book. """
145 book = models.ForeignKey(Book)
146 amount = models.DecimalField(_('amount'), decimal_places=2, max_digits=10)
147 timestamp = models.DateField(_('when'))
150 verbose_name = _('money spent on a book')
151 verbose_name_plural = _('money spent on books')
152 ordering = ['-timestamp']
154 def __unicode__(self):
155 return u"Spent: %s" % unicode(self.book)
158 def new_payment_query_listener(sender, order=None, payment=None, **kwargs):
159 """ Set payment details for getpaid. """
160 payment.amount = order.amount
161 payment.currency = 'PLN'
162 getpaid.signals.new_payment_query.connect(new_payment_query_listener)
165 def payment_status_changed_listener(sender, instance, old_status, new_status, **kwargs):
166 """ React to status changes from getpaid. """
167 if old_status != 'paid' and new_status == 'paid':
168 instance.order.payed_at = datetime.now()
169 instance.order.save()
170 getpaid.signals.payment_status_changed.connect(payment_status_changed_listener)