Move activitypub serialization into a module

fedireads/activitypub/collection.py

@@ -0,0 +1,34 @@
+''' activitypub json for collections '''
+from uuid import uuid4
+
+def get_add(*args):
+    ''' activitypub Add activity '''
+    return get_add_remove(*args, action='Add')
+
+
+def get_remove(*args):
+    ''' activitypub Add activity '''
+    return get_add_remove(*args, action='Remove')
+
+
+def get_add_remove(user, book, shelf, action='Add'):
+    ''' format an Add or Remove json blob '''
+    uuid = uuid4()
+    return {
+        '@context': 'https://www.w3.org/ns/activitystreams',
+        'id': str(uuid),
+        'type': action,
+        'actor': user.actor,
+        'object': {
+            'type': 'Document',
+            'name': book.data['title'],
+            'url': book.openlibrary_key
+        },
+        'target': {
+            'type': 'Collection',
+            'name': shelf.name,
+            'id': shelf.absolute_id,
+        }
+    }
+
+