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 description = models.TextField(_('description'), blank=True)
19 target = models.DecimalField(_('target'), decimal_places=2, max_digits=10)
20 start = models.DateField(_('start'), db_index=True)
21 end = models.DateField(_('end'), db_index=True)
22 due = models.DateField(_('due'),
23 help_text=_('When will it be published if the money is raised.'))
24 redakcja_url = models.URLField(_('redakcja URL'), blank=True)
25 book = models.ForeignKey(Book, null=True, blank=True,
26 help_text=_('Published book.'))
27 cover = models.ImageField(_('cover'), upload_to = 'funding/covers')
29 def cover_img_tag(self):
30 return u'<img src="%s" />' % self.cover.url
31 cover_img_tag.short_description = _('Cover preview')
32 cover_img_tag.allow_tags = True
35 verbose_name = _('offer')
36 verbose_name_plural = _('offers')
39 def __unicode__(self):
40 return u"%s - %s" % (self.author, self.title)
42 def get_absolute_url(self):
43 return reverse('funding_offer', args=[self.slug])
46 return self.start <= date.today() <= self.end
49 return self.sum() >= self.target
55 return self.sum() - self.target
61 """ Returns current fundraiser or None. """
63 objects = cls.objects.filter(start__lte=today, end__gte=today)
71 """ QuerySet for all current and past fundraisers. """
73 return cls.objects.filter(end__lt=today)
77 """ QuerySet for all current and past fundraisers. """
79 return cls.objects.filter(start__lte=today)
81 def get_perks(self, amount=None):
82 """ Finds all the perks for the offer.
84 If amount is provided, returns the perks you get for it.
87 perks = Perk.objects.filter(
88 models.Q(offer=self) | models.Q(offer=None)
89 ).exclude(end_date__lt=date.today())
90 if amount is not None:
91 perks = perks.filter(price__lte=amount)
94 def funding_payed(self):
95 """ QuerySet for all completed payments for the offer. """
96 return Funding.payed().filter(offer=self)
99 """ The money gathered. """
100 return self.funding_payed().aggregate(s=models.Sum('amount'))['s'] or 0
103 class Perk(models.Model):
106 If no attached to a particular Offer, applies to all.
109 offer = models.ForeignKey(Offer, verbose_name=_('offer'), null=True, blank=True)
110 price = models.DecimalField(_('price'), decimal_places=2, max_digits=10)
111 name = models.CharField(_('name'), max_length=255)
112 description = models.TextField(_('description'), blank=True)
113 end_date = models.DateField(_('end date'), null=True, blank=True)
116 verbose_name = _('perk')
117 verbose_name_plural = _('perks')
118 ordering = ['-price']
120 def __unicode__(self):
121 return "%s (%s%s)" % (self.name, self.price, u" for %s" % self.offer if self.offer else "")
124 class Funding(models.Model):
125 """ A person paying in a fundraiser.
127 The payment was completed if and only if payed_at is set.
130 offer = models.ForeignKey(Offer, verbose_name=_('offer'))
131 name = models.CharField(_('name'), max_length=127, blank=True)
132 email = models.EmailField(_('email'), blank=True)
133 amount = models.DecimalField(_('amount'), decimal_places=2, max_digits=10)
134 payed_at = models.DateTimeField(_('payed at'), null=True, blank=True, db_index=True)
135 perks = models.ManyToManyField(Perk, verbose_name=_('perks'), blank=True)
137 # Any additional info needed for perks?
141 """ QuerySet for all completed payments. """
142 return cls.objects.exclude(payed_at=None)
145 verbose_name = _('funding')
146 verbose_name_plural = _('fundings')
147 ordering = ['-payed_at']
149 def __unicode__(self):
150 return unicode(self.offer)
152 def get_absolute_url(self):
153 return reverse('funding_funding', args=[self.pk])
155 # Register the Funding model with django-getpaid for payments.
156 getpaid.register_to_payment(Funding, unique=False, related_name='payment')
159 class Spent(models.Model):
160 """ Some of the remaining money spent on a book. """
161 book = models.ForeignKey(Book)
162 amount = models.DecimalField(_('amount'), decimal_places=2, max_digits=10)
163 timestamp = models.DateField(_('when'))
166 verbose_name = _('money spent on a book')
167 verbose_name_plural = _('money spent on books')
168 ordering = ['-timestamp']
170 def __unicode__(self):
171 return u"Spent: %s" % unicode(self.book)
174 def new_payment_query_listener(sender, order=None, payment=None, **kwargs):
175 """ Set payment details for getpaid. """
176 payment.amount = order.amount
177 payment.currency = 'PLN'
178 getpaid.signals.new_payment_query.connect(new_payment_query_listener)
181 def user_data_query_listener(sender, order, user_data, **kwargs):
182 """ Set user data for payment. """
183 user_data['email'] = order.email
184 getpaid.signals.user_data_query.connect(user_data_query_listener)
186 def payment_status_changed_listener(sender, instance, old_status, new_status, **kwargs):
187 """ React to status changes from getpaid. """
188 if old_status != 'paid' and new_status == 'paid':
189 instance.order.payed_at = datetime.now()
190 instance.order.save()
191 getpaid.signals.payment_status_changed.connect(payment_status_changed_listener)