Formatter for converting model images to AP Images

Replaces reduntant properties on user and book models

bookwyrm/models/base_model.py

@@ -261,3 +261,25 @@ def tag_formatter(items, name_field, activity_type):
             type=activity_type
         ))
     return tags
+
+
+def image_formatter(image, default_path=None):
+    ''' convert images into activitypub json '''
+    if image:
+        url = image.url
+    elif default_path:
+        url = default_path
+    else:
+        return None
+    url = 'https://%s%s' % (DOMAIN, url)
+    return activitypub.Image(url=url)
+
+
+def image_attachments_formatter(images):
+    ''' create a list of image attachemnts '''
+    if not isinstance(images, list):
+        images = [images]
+    attachments = []
+    for image in images:
+        attachments.append(image_formatter(image))
+    return attachments

bookwyrm/models/book.py

@@ -12,6 +12,7 @@ from bookwyrm.utils.fields import ArrayField
 
 from .base_model import ActivityMapping, BookWyrmModel
 from .base_model import ActivitypubMixin, OrderedCollectionPageMixin
+from .base_model import image_attachments_formatter
 
 class Book(ActivitypubMixin, BookWyrmModel):
     ''' a generic book, which can mean either an edition or a work '''
@@ -60,15 +61,6 @@ class Book(ActivitypubMixin, BookWyrmModel):
         ''' the activitypub serialization should be a list of author ids '''
         return [a.remote_id for a in self.authors.all()]
 
-    @property
-    def ap_cover(self):
-        ''' an image attachment '''
-        if not self.cover or not hasattr(self.cover, 'url'):
-            return []
-        return [activitypub.Image(
-            url='https://%s%s' % (DOMAIN, self.cover.url),
-        )]
-
     @property
     def ap_parent_work(self):
         ''' reference the work via local id not remote '''
@@ -106,7 +98,10 @@ class Book(ActivitypubMixin, BookWyrmModel):
 
         ActivityMapping('lccn', 'lccn'),
         ActivityMapping('editions', 'editions_path'),
-        ActivityMapping('attachment', 'ap_cover'),
+        ActivityMapping(
+            'attachment', 'cover',
+            image_attachments_formatter
+        ),
     ]
 
     def save(self, *args, **kwargs):

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, OrderedCollectionPageMixin
-from .base_model import ActivityMapping
+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'