text: # MIT License
  #
  # Copyright (c) 2017 Arkadiusz Netczuk <dev.arnet@gmail.com>
  #
  # Permission is hereby granted, free of charge, to any person obtaining a copy
  # of this software and associated documentation files (the "Software"), to deal
  # in the Software without restriction, including without limitation the rights
  # to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  # copies of the Software, and to permit persons to whom the Software is
  # furnished to do so, subject to the following conditions:
  #
  # The above copyright notice and this permission notice shall be included in all
  # copies or substantial portions of the Software.
  #
  # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  # IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  # FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  # AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  # LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  # SOFTWARE.
  #
  
  
  from enum import Enum, unique, auto
  import abc
  
  
  @unique
  class ConnectionState(Enum):
      CONNECTED           = auto()
      CONN_IN_PROGRESS    = auto()
      DISCONNECTED        = auto()
  
  
  class DeviceConnector(metaclass=abc.ABCMeta):
  
      def __init__(self):
          pass
  
      @abc.abstractmethod
      def address(self):
          raise NotImplementedError('You need to define this method in derived class!')
  
      def isConnected(self):
          status = self.getConnectionStatus()
          return status == ConnectionState.CONNECTED
  
      @abc.abstractmethod
      def getConnectionStatus(self) -> ConnectionState:
          raise NotImplementedError('You need to define this method in derived class!')
  
      @abc.abstractmethod
      def scanDevices(self):
          raise NotImplementedError('You need to define this method in derived class!')
  
      @abc.abstractmethod
      def connectTo(self, deviceAddr):
          raise NotImplementedError('You need to define this method in derived class!')
  
      @abc.abstractmethod
      def reconnect(self):
          raise NotImplementedError('You need to define this method in derived class!')
  
      @abc.abstractmethod
      def disconnect(self):
          raise NotImplementedError('You need to define this method in derived class!')
  
  
  class ScanItem():
  
      def __init__(self, name, address):
          self._name = name
          self._address = address
  
      @property
      def name(self):
          return self._name
  
      @property
      def address(self):
          return self._address
  
  