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 urllib import urlencode
7 from django.core.urlresolvers import reverse
8 from django.core.mail import send_mail
9 from django.conf import settings
10 from django.template.loader import render_to_string
11 from django.db import models
12 from django.utils.timezone import utc
13 from django.utils.translation import ugettext_lazy as _, override
15 from catalogue.models import Book
16 from catalogue.utils import get_random_hash
17 from polls.models import Poll
18 from django.contrib.sites.models import Site
19 from . import app_settings
22 class Offer(models.Model):
23 """ A fundraiser for a particular book. """
24 author = models.CharField(_('author'), max_length=255)
25 title = models.CharField(_('title'), max_length=255)
26 slug = models.SlugField(_('slug'))
27 description = models.TextField(_('description'), blank=True)
28 target = models.DecimalField(_('target'), decimal_places=2, max_digits=10)
29 start = models.DateField(_('start'), db_index=True)
30 end = models.DateField(_('end'), db_index=True)
31 redakcja_url = models.URLField(_('redakcja URL'), blank=True)
32 book = models.ForeignKey(Book, null=True, blank=True,
33 help_text=_('Published book.'))
34 cover = models.ImageField(_('Cover'), upload_to='funding/covers')
35 poll = models.ForeignKey(Poll, help_text=_('Poll'), null=True, blank=True, on_delete=models.SET_NULL)
37 notified_near = models.DateTimeField(_('Near-end notifications sent'), blank=True, null=True)
38 notified_end = models.DateTimeField(_('End notifications sent'), blank=True, null=True)
40 def cover_img_tag(self):
41 return u'<img src="%s" />' % self.cover.url
42 cover_img_tag.short_description = _('Cover preview')
43 cover_img_tag.allow_tags = True
46 verbose_name = _('offer')
47 verbose_name_plural = _('offers')
50 def __unicode__(self):
51 return u"%s - %s" % (self.author, self.title)
53 def get_absolute_url(self):
54 return reverse('funding_offer', args=[self.slug])
56 def save(self, *args, **kw):
57 published_now = (self.book_id is not None and
58 self.pk is not None and
59 type(self).objects.values('book').get(pk=self.pk)['book'] != self.book_id)
60 retval = super(Offer, self).save(*args, **kw)
62 self.notify_published()
66 return self.start <= date.today() <= self.end and self == self.current()
69 return self.sum() >= self.target
75 return self.sum() - self.target
81 """ Returns current fundraiser or None.
83 Current fundraiser is the one that:
84 - has already started,
86 - if there's more than one of those, it's the one that ends last.
90 objects = cls.objects.filter(start__lte=today, end__gte=today).order_by('-end')
98 """ QuerySet for all past fundraisers. """
99 objects = cls.public()
100 current = cls.current()
101 if current is not None:
102 objects = objects.exclude(pk=current.pk)
107 """ QuerySet for all current and past fundraisers. """
109 return cls.objects.filter(start__lte=today)
111 def get_perks(self, amount=None):
112 """ Finds all the perks for the offer.
114 If amount is provided, returns the perks you get for it.
117 perks = Perk.objects.filter(
118 models.Q(offer=self) | models.Q(offer=None)
119 ).exclude(end_date__lt=date.today())
120 if amount is not None:
121 perks = perks.filter(price__lte=amount)
124 def funding_payed(self):
125 """ QuerySet for all completed payments for the offer. """
126 return Funding.payed().filter(offer=self)
129 return self.funding_payed().order_by('-amount', 'payed_at')
132 """ The money gathered. """
133 return self.funding_payed().aggregate(s=models.Sum('amount'))['s'] or 0
135 def notify_all(self, subject, template_name, extra_context=None):
136 Funding.notify_funders(
137 subject, template_name, extra_context,
138 query_filter=models.Q(offer=self)
141 def notify_end(self, force=False):
142 if not force and self.notified_end: return
143 assert not self.is_current()
145 _('The fundraiser has ended!'),
146 'funding/email/end.txt', {
148 'is_win': self.is_win(),
149 'remaining': self.remaining(),
150 'current': self.current(),
152 self.notified_end = datetime.utcnow().replace(tzinfo=utc)
155 def notify_near(self, force=False):
156 if not force and self.notified_near: return
157 assert self.is_current()
159 need = self.target - sum_
161 _('The fundraiser will end soon!'),
162 'funding/email/near.txt', {
163 'days': (self.end - date.today()).days + 1,
165 'is_win': self.is_win(),
169 self.notified_near = datetime.utcnow().replace(tzinfo=utc)
172 def notify_published(self):
173 assert self.book is not None
175 _('The book you helped fund has been published.'),
176 'funding/email/published.txt', {
179 'author': self.book.pretty_title(),
180 'current': self.current(),
184 class Perk(models.Model):
187 If no attached to a particular Offer, applies to all.
190 offer = models.ForeignKey(Offer, verbose_name=_('offer'), null=True, blank=True)
191 price = models.DecimalField(_('price'), decimal_places=2, max_digits=10)
192 name = models.CharField(_('name'), max_length=255)
193 long_name = models.CharField(_('long name'), max_length=255)
194 end_date = models.DateField(_('end date'), null=True, blank=True)
197 verbose_name = _('perk')
198 verbose_name_plural = _('perks')
199 ordering = ['-price']
201 def __unicode__(self):
202 return "%s (%s%s)" % (self.name, self.price, u" for %s" % self.offer if self.offer else "")
205 class Funding(models.Model):
206 """ A person paying in a fundraiser.
208 The payment was completed if and only if payed_at is set.
211 offer = models.ForeignKey(Offer, verbose_name=_('offer'))
212 name = models.CharField(_('name'), max_length=127, blank=True)
213 email = models.EmailField(_('email'), blank=True, db_index=True)
214 amount = models.DecimalField(_('amount'), decimal_places=2, max_digits=10)
215 payed_at = models.DateTimeField(_('payed at'), null=True, blank=True, db_index=True)
216 perks = models.ManyToManyField(Perk, verbose_name=_('perks'), blank=True)
217 language_code = models.CharField(max_length=2, null=True, blank=True)
218 notifications = models.BooleanField(_('notifications'), default=True, db_index=True)
219 notify_key = models.CharField(max_length=32)
222 verbose_name = _('funding')
223 verbose_name_plural = _('fundings')
224 ordering = ['-payed_at']
228 """ QuerySet for all completed payments. """
229 return cls.objects.exclude(payed_at=None)
231 def __unicode__(self):
232 return unicode(self.offer)
234 def get_absolute_url(self):
235 return reverse('funding_funding', args=[self.pk])
237 def perk_names(self):
238 return ", ".join(perk.name for perk in self.perks.all())
240 def get_disable_notifications_url(self):
241 return "%s?%s" % (reverse("funding_disable_notifications"),
244 'key': self.notify_key,
247 def save(self, *args, **kwargs):
248 if self.email and not self.notify_key:
249 self.notify_key = get_random_hash(self.email)
250 return super(Funding, self).save(*args, **kwargs)
253 def notify_funders(cls, subject, template_name, extra_context=None,
254 query_filter=None, payed_only=True):
255 funders = cls.objects.exclude(email="").filter(notifications=True)
257 funders = funders.exclude(payed_at=None)
258 if query_filter is not None:
259 funders = funders.filter(query_filter)
261 for funder in funders:
262 if funder.email in emails:
264 emails.add(funder.email)
265 funder.notify(subject, template_name, extra_context)
267 def notify(self, subject, template_name, extra_context=None):
270 'site': Site.objects.get_current(),
273 context.update(extra_context)
274 with override(self.language_code or app_settings.DEFAULT_LANGUAGE):
276 render_to_string(template_name, context),
277 settings.CONTACT_EMAIL,
282 def disable_notifications(self):
283 """Disables all notifications for this e-mail address."""
284 type(self).objects.filter(email=self.email).update(notifications=False)
287 # Register the Funding model with django-getpaid for payments.
288 getpaid.register_to_payment(Funding, unique=False, related_name='payment')
291 class Spent(models.Model):
292 """ Some of the remaining money spent on a book. """
293 book = models.ForeignKey(Book)
294 amount = models.DecimalField(_('amount'), decimal_places=2, max_digits=10)
295 timestamp = models.DateField(_('when'))
298 verbose_name = _('money spent on a book')
299 verbose_name_plural = _('money spent on books')
300 ordering = ['-timestamp']
302 def __unicode__(self):
303 return u"Spent: %s" % unicode(self.book)
306 def new_payment_query_listener(sender, order=None, payment=None, **kwargs):
307 """ Set payment details for getpaid. """
308 payment.amount = order.amount
309 payment.currency = 'PLN'
310 getpaid.signals.new_payment_query.connect(new_payment_query_listener)
313 def user_data_query_listener(sender, order, user_data, **kwargs):
314 """ Set user data for payment. """
315 user_data['email'] = order.email
316 getpaid.signals.user_data_query.connect(user_data_query_listener)
318 def payment_status_changed_listener(sender, instance, old_status, new_status, **kwargs):
319 """ React to status changes from getpaid. """
320 if old_status != 'paid' and new_status == 'paid':
321 instance.order.payed_at = datetime.utcnow().replace(tzinfo=utc)
322 instance.order.save()
323 if instance.order.email:
324 instance.order.notify(
325 _('Thank you for your support!'),
326 'funding/email/thanks.txt'
328 getpaid.signals.payment_status_changed.connect(payment_status_changed_listener)