add support for data annotations

pandora/annotation/models.py

@@ -1,5 +1,6 @@
 # -*- coding: utf-8 -*-
 
+import json
 import re
 import unicodedata
 
@@ -138,6 +139,12 @@ class Annotation(models.Model):
         set_public_id = not self.id or not self.public_id
         layer = self.get_layer()
         if self.value:
+            if layer['type'] == "data" and not isinstance(self.value, str):
+                try:
+                    self.value = json.dumps(self.value, ensure_ascii=False)
+                except:
+                    pass
+            else:
                 self.value = utils.cleanup_value(self.value, layer['type'])
 
             findvalue = self.value
@@ -393,7 +400,11 @@ class Annotation(models.Model):
         # them specially. See Item.add_empty_clips
         if l.get('isSubtitles') and 'id' in j and not self.value:
             del j['id']
-
+        if l['type']  == "data" and "value" in j:
+            try:
+                j["value"] = json.loads(j["value"])
+            except:
+                pass
         return j
 
     def __str__(self):