+def get_slivers(api, slice_filter, node = None):
+ # Get slice information
+ slices = Slices(api, slice_filter)
+
+ # Build up list of users and slice attributes
+ person_ids = set()
+ slice_attribute_ids = set()
+ for slice in slices:
+ person_ids.update(slice['person_ids'])
+ slice_attribute_ids.update(slice['slice_attribute_ids'])
+
+ # Get user information
+ all_persons = Persons(api, person_ids).dict()
+
+ # Build up list of keys
+ key_ids = set()
+ for person in all_persons.values():
+ key_ids.update(person['key_ids'])
+
+ # Get user account keys
+ all_keys = Keys(api, key_ids).dict()
+
+ # Get slice attributes
+ all_slice_attributes = SliceAttributes(api, slice_attribute_ids).dict()
+
+ slivers = []
+ for slice in slices:
+ keys = []
+ for person_id in slice['person_ids']:
+ if person_id in all_persons:
+ person = all_persons[person_id]
+ if not person['enabled']:
+ continue
+ for key_id in person['key_ids']:
+ if key_id in all_keys:
+ key = all_keys[key_id]
+ keys += [{'key_type': key['key_type'],
+ 'key': key['key']}]
+
+ attributes = []
+
+ # All (per-node and global) attributes for this slice
+ slice_attributes = []
+ for slice_attribute_id in slice['slice_attribute_ids']:
+ if slice_attribute_id in all_slice_attributes:
+ slice_attributes.append(all_slice_attributes[slice_attribute_id])
+
+ # Per-node sliver attributes take precedence over global
+ # slice attributes, so set them first.
+ sliver_attributes = []
+
+ if node is not None:
+ for sliver_attribute in filter(lambda a: a['node_id'] == node['node_id'], slice_attributes):
+ sliver_attributes.append(sliver_attribute['name'])
+ attributes.append({'name': sliver_attribute['name'],
+ 'value': sliver_attribute['value']})
+
+ for slice_attribute in filter(lambda a: a['node_id'] is None, slice_attributes):
+ # Do not set any global slice attributes for
+ # which there is at least one sliver attribute
+ # already set.
+ if slice_attribute['name'] not in sliver_attributes:
+ attributes.append({'name': slice_attribute['name'],
+ 'value': slice_attribute['value']})
+
+ slivers.append({
+ 'name': slice['name'],
+ 'slice_id': slice['slice_id'],
+ 'instantiation': slice['instantiation'],
+ 'expires': slice['expires'],
+ 'keys': keys,
+ 'attributes': attributes
+ })
+
+ return slivers
+