"""
CityObjectsCluster module
SPDX - License - Identifier: LGPL - 3.0 - or -later
Copyright © 2020 Project Author Pilar Monsalvete Alvarez de Uribarri pilar.monsalvete@concordia.ca
"""

from abc import ABC


class CityObjectsCluster(ABC):
  """
  CityObjectsCluster(ABC) class
  """
  def __init__(self, name, cluster_type, city_objects):
    self._name = name
    self._cluster_type = cluster_type
    self._city_objects = city_objects

  @property
  def name(self):
    return self._name

  @property
  def type(self):
    raise NotImplementedError

  @property
  def city_objects(self):
    raise NotImplementedError

  def add_city_object(self, city_object):
    if self._city_objects is None:
      self._city_objects = [city_object]
    else:
      self._city_objects.append(city_object)
    return self._city_objects