def register_card_usage(self, card_guid):
"""
Send query to server about card usage
:param card_guid: used card GUID
"""
ui.show_data(ui.CARD_SCANNED)
self.query_card_usage(card_guid, self.__term_guid)
def wait_for_server_response(self):
"""
Waiting for response from server (Every 2 seconds send query about terminals until dont get this one from server)
"""
ui.show_data(ui.WAITING_FOR_SERVER)
while self.__term_list is None:
time.sleep(2)
self.query_available_terminals()
def check_any_terminal_registered(self):
"""
Check if at least one terminal is added in database. If not then exit program
:return: True - at least one terminal is added in database, False - otherwise
"""
if len(self.__term_list) == 0:
ui.show_data(ui.NOT_FOUND_TERMINAL)
ui.read_data(ui.INPUT_WAITING)
exit(0)
def read_terminal(self):
"""
Waiting for message from server about terminals, ask for choosing one of available
and send message to server about ID of chosen terminal
"""
self.wait_for_server_response()
self.check_any_terminal_registered()
ui.show_data(ui.TERMINALS_READED)
self.__term_guid = self.choose_terminal()
query = TERM_SELECTED_QUERY + "." + "ID of connected terminal:." + self.__term_guid
self.__client.publish(self.config["server_topic"], query)
def scan_card(self):
"""
Scan and return card GUID - temporary mocked to read RFID card code from user console
:return: used card GUID
"""
prompt = "Temporary mocked - put card id from keyboard or nothing to exit: "
user_input = ui.read_data(prompt)
while not user_input.isdigit() and not user_input == EXIT_BTN:
ui.show_data(ui.WRONG_CARD_GUID)
user_input = ui.read_data(prompt)
return user_input
def run(self):
"""
Run client application. Executed in loop until specific exit input not given
"""
self.setup()
self.read_terminal()
while self.__client_active:
ui.show_data(ui.SCAN_CARD_PROMPT)
card_guid = self.scan_card()
self.__client_active = not card_guid == EXIT_BTN
if card_guid != EXIT_BTN:
self.register_card_usage(card_guid)
self.disconnect_from_broker()
def choose_terminal(self):
"""
Read terminal GUID until not find it in database
:return: Terminal from database with given GUID from user input
"""
ui.show_data(ui.TERMINALS_MENU)
ui.show_data(self.__term_list)
term_guid = ui.read_data(ui.TERMINAL_INPUT)
while term_guid not in self.__term_list:
ui.show_data(term_guid + ": " + ui.INCORRECT_TERMINAL + "\n" + ui.SEPARATOR + "\n" + ui.TERMINALS_MENU)
ui.show_data(self.__term_list)
term_guid = ui.read_data(ui.TERMINAL_INPUT)
return term_guid