Merge master into img-playground. Image support with new management features. Missing...

[redakcja.git] / apps / catalogue / models / image.py

diff --git a/apps/catalogue/models/image.py b/apps/catalogue/models/image.py
new file mode 100755 (executable)
index 0000000..53f8830
--- /dev/null
+++ b/apps/catalogue/models/image.py
@@ -0,0 +1,95 @@
+# -*- coding: utf-8 -*-
+#
+# This file is part of FNP-Redakcja, licensed under GNU Affero GPLv3 or later.
+# Copyright © Fundacja Nowoczesna Polska. See NOTICE for more information.
+#
+from django.conf import settings
+from django.db import models
+from django.template.loader import render_to_string
+from django.utils.translation import ugettext_lazy as _
+from catalogue.helpers import cached_in_field
+from catalogue.tasks import refresh_instance
+from dvcs import models as dvcs_models
+
+
+class Image(dvcs_models.Document):
+    """ An editable chunk of text. Every Book text is divided into chunks. """
+    REPO_PATH = settings.CATALOGUE_IMAGE_REPO_PATH
+
+    image = models.FileField(_('image'), upload_to='catalogue/images')
+    title = models.CharField(_('title'), max_length=255, blank=True)
+    slug = models.SlugField(_('slug'), unique=True)
+    public = models.BooleanField(_('public'), default=True, db_index=True)
+
+    # cache
+    _short_html = models.TextField(null=True, blank=True, editable=False)
+    _new_publishable = models.NullBooleanField(editable=False)
+    _published = models.NullBooleanField(editable=False)
+    _changed = models.NullBooleanField(editable=False)
+
+    class Meta:
+        app_label = 'catalogue'
+        ordering = ['title']
+        verbose_name = _('image')
+        verbose_name_plural = _('images')
+        permissions = [('can_pubmark_image', 'Can mark images for publishing')]
+
+    # Representing
+    # ============
+
+    def __unicode__(self):
+        return self.title
+
+    @models.permalink
+    def get_absolute_url(self):
+        return ("wiki_img_editor", [self.slug])
+
+    # State & cache
+    # =============
+
+    def accessible(self, request):
+        return self.public or request.user.is_authenticated()
+
+    def is_new_publishable(self):
+        change = self.publishable()
+        if not change:
+            return False
+        return change.publish_log.exists()
+    new_publishable = cached_in_field('_new_publishable')(is_new_publishable)
+
+    def is_published(self):
+        return self.publish_log.exists()
+    published = cached_in_field('_published')(is_published)
+
+    def is_changed(self):
+        if self.head is None:
+            return False
+        return not self.head.publishable
+    changed = cached_in_field('_changed')(is_changed)
+
+    @cached_in_field('_short_html')
+    def short_html(self):
+        return render_to_string(
+                    'catalogue/image_short.html', {'image': self})
+
+    def refresh(self):
+        """This should be done offline."""
+        self.short_html
+        self.single
+        self.new_publishable
+        self.published
+
+    def touch(self):
+        update = {
+            "_changed": self.is_changed(),
+            "_short_html": None,
+            "_new_publishable": self.is_new_publishable(),
+            "_published": self.is_published(),
+        }
+        Image.objects.filter(pk=self.pk).update(**update)
+        refresh_instance(self)
+
+    def refresh(self):
+        """This should be done offline."""
+        self.changed
+        self.short_html