corelink_init.py

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"""
    @file corelink_init.py
     Copies the initialization from the DLL to wrapper
"""
import ctypes
import corelink_const
import corelink_exception

# pylint: disable=global-statement
# global declaration is essential
CALLBACK_UPDATE = None
CALLBACK_UPDATE_M = None
CALLBACK_SETONSTALE = None
CALLBACK_SETONSTALE_M = None

class DLLInit:
    """
        DLLInit
    """
    @staticmethod
    def init():
        """
            Initilaize
        """
        corelink_const.LIB.DLLInit()
        corelink_const.LIB.setDroppedCallbackHandler(None)
        corelink_const.LIB.setStaleCallbackHandler(None)
        corelink_const.LIB.setSubscribeCallbackHandler(None)
        corelink_const.LIB.setUpdateCallbackHandler(None)

    @staticmethod
    def set_init_state(state):
        """"
            Set Initial State
        """
        state_c = ctypes.c_int(state)
        error_id = ctypes.c_int()
        corelink_const.LIB.setInitState(state_c,ctypes.byref(error_id))
        corelink_exception.CorelinkException.get_dll_exception(error_id)

    @staticmethod
    def set_server_credentials(username,password):
        """
            Set Server Credentials
        """
        username_c = username.encode('utf-8')
        password_c = password.encode('utf-8')
        corelink_const.LIB.setServerCredentials.argtypes = [ctypes.c_char_p, ctypes.c_char_p]
        corelink_const.LIB.setServerCredentials(username_c,password_c)

    @staticmethod
    def set_on_stale(func):
        """
            Set on stale
        """
        global CALLBACK_SETONSTALE,CALLBACK_SETONSTALE_M
        CALLBACK_SETONSTALE_M = func
        CALLBACK_SETONSTALE = ctypes.CFUNCTYPE(None,
                                ctypes.POINTER(ctypes.c_int))(DLLInit.set_on_stale_temp)
        corelink_const.LIB.setStaleCallbackHandler(CALLBACK_SETONSTALE)

    @staticmethod
    def set_on_stale_temp(send_id):
        """
            Helper function for setOn stale
        """
        global CALLBACK_SETONSTALE_M
        CALLBACK_SETONSTALE_M((send_id.contents).value)
    @staticmethod
    def set_on_update(func):
        """
            Set on Update
        """
        global CALLBACK_UPDATE,CALLBACK_UPDATE_M
        CALLBACK_UPDATE_M = func
        CALLBACK_UPDATE = ctypes.CFUNCTYPE(None,
                            ctypes.POINTER(ctypes.c_int),
                            ctypes.POINTER(ctypes.c_int))(DLLInit.set_on_update_temp)
        corelink_const.LIB.setUpdateCallbackHandler(CALLBACK_UPDATE)

    @staticmethod
    def set_on_update_temp(recv_id,send_id):
        """"
            Set on Update helper function
        """
        global CALLBACK_UPDATE_M
        CALLBACK_UPDATE_M((recv_id.contents).value,(send_id.contents).value)