Thumbnail and preview image URLs for Persona model.

apps/addons/models.py

@@ -367,6 +367,24 @@ class Persona(caching.base.CachingMixin, models.Model):
     def __unicode__(self):
         return unicode(self.addon.name)
 
+    def _image_url(self, filename):
+        units = self.id % 10
+        tens = (self.id // 10) % 10
+        return settings.PERSONAS_IMAGE_URL % {
+            'units': units, 'tens': tens, 'file': filename,
+            'id': self.id
+        }
+
+    @amo.cached_property
+    def thumb_url(self):
+        """URL to Persona's thumbnail preview."""
+        return self._image_url('preview.jpg')
+
+    @amo.cached_property
+    def preview_url(self):
+        """URL to Persona's big, 680px, preview."""
+        return self._image_url('preview_large.jpg')
+
 
 class AddonCategory(caching.base.CachingMixin, models.Model):
     addon = models.ForeignKey(Addon)

apps/addons/tests/test_models.py

@@ -7,7 +7,7 @@ from nose.tools import eq_, assert_not_equal
 import test_utils
 
 import amo
-from addons.models import Addon, AddonPledge
+from addons.models import Addon, AddonPledge, Persona
 from stats.models import Contribution
 
 
@@ -235,3 +235,12 @@ class TestAddonPledgeModel(test_utils.TestCase):
         pledge = AddonPledge.objects.create(addon_id=4, target=230,
                                             deadline=date.today())
         eq_(pledge.raised, 0)
+
+
+class TestPersonaModel(test_utils.TestCase):
+
+    def test_image_urls(self):
+        mypersona = Persona(id=1234)
+        assert mypersona.thumb_url.endswith('/3/4/1234/preview.jpg')
+        assert mypersona.preview_url.endswith('/3/4/1234/preview_large.jpg')
+        pass

settings.py

@@ -336,6 +336,8 @@ USER_PIC_URL = STATIC_URL + '/img/uploads/userpics/%s/%s/%s.jpg?modified=%d'
 FILES_URL = STATIC_URL + "/downloads/file/%d/%s?src=%s"
 COLLECTION_ICON_URL = ('%s/%s/%s/images/collection_icon/%%s/%%s' %
                        (STATIC_URL, LANGUAGE_CODE, DEFAULT_APP))
+PERSONAS_IMAGE_URL = ('https://getpersonas.com/static/'
+                      '%(tens)d/%(units)d/%(id)d/%(file)s')
 
 # Outgoing URL bouncer
 REDIRECT_URL = 'https://outgoing.mozilla.org/v1/'