Add support for Action API

Currently doesn't seem to work - server always returns an error

trovebox/objects/action.py

@@ -0,0 +1,47 @@
+"""
+Representation of an Action object
+"""
+from trovebox.errors import TroveboxError
+from .trovebox_object import TroveboxObject
+from .photo import Photo
+
+class Action(TroveboxObject):
+    """ Representation of an Action object """
+    def __init__(self, trovebox, json_dict):
+        self.target = None
+        self.target_type = None
+        TroveboxObject.__init__(self, trovebox, json_dict)
+        self._update_fields_with_objects()
+
+    def _update_fields_with_objects(self):
+        """ Convert dict fields into objects, where appropriate """
+        # Update the photo target with photo objects
+        if self.target is not None:
+            if self.target_type == "photo":
+                self.target = Photo(self._trovebox, self.target)
+            else:
+                raise NotImplementedError("Actions can only be assigned to "
+                                          "Photos")
+
+    def delete(self, **kwds):
+        """
+        Delete this action.
+        Returns True if successful.
+        Raises a TroveboxError if not.
+        """
+        result = self._trovebox.post("/action/%s/delete.json" %
+                                     self.id, **kwds)["result"]
+        if not result:
+            raise TroveboxError("Delete response returned False")
+        self._delete_fields()
+        return result
+
+    def view(self, **kwds):
+        """
+        Requests the full contents of the action.
+        Updates the action's fields with the response.
+        """
+        result = self._trovebox.get("/action/%s/view.json" %
+                                    self.id, **kwds)["result"]
+        self._replace_fields(result)
+        self._update_fields_with_objects()