Formatter for converting model images to AP Images

Replaces reduntant properties on user and book models

bookwyrm/models/user.py

@@ -10,8 +10,8 @@ from bookwyrm.models.shelf import Shelf
 from bookwyrm.models.status import Status
 from bookwyrm.settings import DOMAIN
 from bookwyrm.signatures import create_key_pair
-from .base_model import OrderedCollectionPageMixin
-from .base_model import ActivityMapping
+from .base_model import ActivityMapping, OrderedCollectionPageMixin
+from .base_model import image_formatter
 
 
 class User(OrderedCollectionPageMixin, AbstractUser):
@@ -78,16 +78,6 @@ class User(OrderedCollectionPageMixin, AbstractUser):
         ''' generates url for activitypub followers page '''
         return '%s/followers' % self.remote_id
 
-    @property
-    def ap_icon(self):
-        ''' send default icon if one isn't set '''
-        if self.avatar:
-            url = self.avatar.url
-        else:
-            url = '/static/images/default_avi.jpg'
-        url = 'https://%s%s' % (DOMAIN, url)
-        return activitypub.Image(url=url)
-
     @property
     def ap_public_key(self):
         ''' format the public key block for activitypub '''
@@ -122,7 +112,10 @@ class User(OrderedCollectionPageMixin, AbstractUser):
             activity_formatter=lambda x: {'sharedInbox': x},
             model_formatter=lambda x: x.get('sharedInbox')
         ),
-        ActivityMapping('icon', 'ap_icon'),
+        ActivityMapping(
+            'icon', 'avatar',
+            lambda x: image_formatter(x, '/static/images/default_avi.jpg')
+        ),
         ActivityMapping(
             'manuallyApprovesFollowers',
             'manually_approves_followers'