def diffObject(self, user, ref):
"""
Opens a copy of the object given as ref and
returns a diff - if any.
"""
item = self.db.object_pool.find_one({'uuid': ref})
if item is None:
return None
if not self.__check_user(ref, user):
raise ValueError(C.make_error("NO_OBJECT_OWNER"))
# Load current object
current_obj = ObjectProxy(item['object']['dn'])
# Load cache object
cache_obj = item['object']['object']
if cache_obj is None:
cache_obj = self.__object[ref]
##
## Generate delta
##
delta = {'attributes': {'added': {}, 'removed': [], 'changed': {}}, 'extensions': {'added': [], 'removed': []}}
# Compare extension list
crnt_extensions = set(current_obj.get_object_info()['extensions'].items())
cche_extensions = set(cache_obj.get_object_info()['extensions'].items())
for _e, _s in crnt_extensions - cche_extensions:
if _s:
delta['extensions']['added'].append(_e)
else:
delta['extensions']['removed'].append(_e)
# Compare attribute contents
crnt_attributes = dict(filter(lambda x: x[1], current_obj.get_attribute_values()['value'].items()))
cche_attributes = dict(filter(lambda x: x[1], cache_obj.get_attribute_values()['value'].items()))
for _k, _v in crnt_attributes.items():
if _k in cche_attributes:
if _v != cche_attributes[_k]:
delta['attributes']['changed'][_k] = _v
else:
delta['attributes']['added'][_k] = _v
for _k, _v in cche_attributes.items():
if not _k in crnt_attributes:
delta['attributes']['removed'].append(_k)
return delta
