def userinterface() -> None:
'''
This method runs the connection between this program and the server program
to play a game of connect four, using functions from this and other classes imported
from above.
'''
try:
_welcome_screen()#Welcomes the user.
connection = '' #Used here to avoid error when user doesn't enter a host and port
connection = _connect_ui() #connects the program to the server
username = _request_username() #Gets a username for the user
connectfour_protocol.interact(connection, username, 'I32CFSP_HELLO ', 'WELCOME ' + username) #Sends the initial client message specifying protocol
connectfour_protocol.interact(connection, 'AI_GAME', '', 'READY') #Sends the client protocol and gets the server protocol to start the AI
game_state = connectfour_shared.initiate_game() #Starts new game and prints the board
while True:
try:
move = connectfour_shared.request_move() #Gets users move
game_state = connectfour_shared.update_board(game_state, move)#updates the board
connectfour_shared.print_board(game_state)#prints the new game_state
response = connectfour_protocol.interact(connection, move, '', 'READY')#Response from the server
if response == None:#Gets out of loop if server doesn't respond
break
game_state = connectfour_shared.update_board(game_state, response)#Updates the board with server's move
connectfour_shared.print_board(game_state)#Prints the board.
except:
print('Invalid move, please try again')#Exception when user enters invalid move
except ConnectionRefusedError:#If socket fais to connect
print('Connection failed')
except OSError:#If invalid IP adress
print('Not a valid IP Address')
except:#In other cases of errors
print("Sorry we weren't able to connect to that server")
finally:#Closes the connectino if one was made.
if(connection!=''):
connectfour_protocol.close(connection)
print('Game over')
def make_move(game_state : connectfour.ConnectFourGameState) -> connectfour.ConnectFourGameState:
'''
Takes in the game state and asks the user for a move. Then it updates the board
and if that fails the appropriate exception is displayed to the user followed
by a reprompt for a valid move.
'''
while(True):
try:
move = connectfour_shared.request_move() #gets a move
return connectfour_shared.update_board(game_state, move) #updates board
break
except ValueError:#makes sure column number is valid
print('Column number must be between 1 and {}'.format(connectfour.BOARD_COLUMNS))
except connectfour.ConnectFourGameOverError: #checks if game is over
print('The game has already ended.')
raise SystemExit(0)
except connectfour.InvalidConnectFourMoveError: #checks if move is valid
if move[0].upper() == 'DROP':
print('The column is too full to drop a piece in.')
else:
print('The row selected is either empty, or the bottom piece is not your own.')