X-Git-Url: https://git.mdrn.pl/wolnelektury.git/blobdiff_plain/5aa13410812d3fc4b35c039bdc3f0a2edc5185a1..16358b72e70a109652609551c0ad89aec28fc58b:/src/api/fields.py

diff --git a/src/api/fields.py b/src/api/fields.py
index 4bb44dcb9..278af6aea 100644
--- a/src/api/fields.py
+++ b/src/api/fields.py
@@ -1,5 +1,10 @@
+# This file is part of Wolnelektury, licensed under GNU Affero GPLv3 or later.
+# Copyright © Fundacja Nowoczesna Polska. See NOTICE for more information.
+#
 from rest_framework import serializers
+from sorl.thumbnail import default
 from django.core.urlresolvers import reverse
+from club.models import Membership
 
 
 class AbsoluteURLField(serializers.ReadOnlyField):
@@ -32,3 +37,23 @@ class LegacyMixin(object):
             if field in value and value[field] is None:
                 value[field] = ''
         return value
+
+
+class UserPremiumField(serializers.ReadOnlyField):
+    def __init__(self, *args, **kwargs):
+        super(UserPremiumField, self).__init__(*args, source='*', **kwargs)
+
+    def to_representation(self, value):
+        return Membership.is_active_for(value)
+
+
+class ThumbnailField(serializers.FileField):
+    def __init__(self, geometry, *args, **kwargs):
+        self.geometry = geometry
+        super(ThumbnailField, self).__init__(*args, **kwargs)
+
+    def to_representation(self, value):
+        if value:
+            return super(ThumbnailField, self).to_representation(
+                default.backend.get_thumbnail(value, self.geometry)
+            )