-# -*- coding: utf-8 -*-
-# This file is part of Wolnelektury, licensed under GNU Affero GPLv3 or later.
-# Copyright © Fundacja Nowoczesna Polska. See NOTICE for more information.
-#
-import time
-from StringIO import StringIO
-from django.db import models
-from django.utils.translation import ugettext_lazy as _
-from django.template.loader import render_to_string
-from PIL import Image
-
-from sorl.thumbnail.fields import ImageWithThumbnailsField
-from sponsors.fields import JSONField
-from django.core.files.base import ContentFile
-
-THUMB_WIDTH=120
-THUMB_HEIGHT=120
-
-class Sponsor(models.Model):
- name = models.CharField(_('name'), max_length=120)
- _description = models.CharField(_('description'), blank=True, max_length=255)
- logo = ImageWithThumbnailsField(
- _('logo'),
- upload_to='sponsorzy/sponsor/logo',
- thumbnail={
- 'size': (THUMB_WIDTH, THUMB_HEIGHT),
- 'extension': 'png',
- 'options': ['pad', 'detail'],
- })
- url = models.URLField(_('url'), blank=True, verify_exists=False)
-
- def __unicode__(self):
- return self.name
-
- def description(self):
- if len(self._description):
- return self._description
- else:
- return self.name
-
-
-class SponsorPage(models.Model):
- name = models.CharField(_('name'), max_length=120)
- sponsors = JSONField(_('sponsors'), default={})
- _html = models.TextField(blank=True, editable=False)
- sprite = models.ImageField(upload_to='sponsorzy/sprite', blank=True)
-
- def populated_sponsors(self):
- result = []
- offset = 0
- for column in self.get_sponsors_value():
- result_group = {'name': column['name'], 'sponsors': []}
- sponsor_objects = Sponsor.objects.in_bulk(column['sponsors'])
- for sponsor_pk in column['sponsors']:
- try:
- result_group['sponsors'].append((offset, sponsor_objects[sponsor_pk]))
- offset -= THUMB_HEIGHT
- except KeyError:
- pass
- result.append(result_group)
- return result
-
- def render_sprite(self):
- sponsor_ids = []
- for column in self.get_sponsors_value():
- sponsor_ids.extend(column['sponsors'])
- sponsors = Sponsor.objects.in_bulk(sponsor_ids)
- sprite = Image.new('RGB', (THUMB_WIDTH, len(sponsors)*THUMB_HEIGHT))
- for i, sponsor_id in enumerate(sponsor_ids):
- simg = Image.open(sponsors[sponsor_id].logo.thumbnail.dest)
- sprite.paste(simg, (0, i*THUMB_HEIGHT))
- imgstr = StringIO()
- sprite.save(imgstr, 'png')
-
- if self.sprite:
- self.sprite.delete(save=False)
- self.sprite.save('sponsorzy/sprite/%s-%d.png' % (self.name, time.time()), ContentFile(imgstr.getvalue()), save=False)
-
- def html(self):
- return self._html
- html = property(fget=html)
-
- def save(self, *args, **kwargs):
- self.render_sprite()
- self._html = render_to_string('sponsors/page.html', {
- 'sponsors': self.populated_sponsors(),
- 'page': self
- })
- return super(SponsorPage, self).save(*args, **kwargs)
-
- def __unicode__(self):
- return self.name
-