def set_name(client: Client, formatter: F = None) -> None:
"""
"Change my name" client menu option.
---
Arguments
---
client (Client)
The client instance which the name will be changed.
formatter (Formatter, None)
A Formatter to format some of the screen text.
"""
# If a string Formatter was not provided,...
if formatter is None:
# ... instantiates a new one.
formatter = F().magenta()
# Asks the user for the client name until it is valid.
while True:
print(formatter.erase(title()))
print(_l(formatter.erase('Choose how you want to be called.')))
try:
# Waits for the user to provide the client name.
client.set_name(input(_lt('Your name: ')))
break
# Empty name.
except InvalidNameError:
err = 'You must provide a name!'
print(_lt(error(err)))
press_enter_to('try again', F().red(), F().white())
def server_option() -> None:
"""
"Server" main menu option.
"""
# Instantiates a brand new server.
server = Server(GREEN)
try:
while True:
print(F().blue(title()))
print(_l(F().blue('Configure the connection for this server.')))
try:
# Waits for the user to provide the server port number.
port = input(
_lt('Port number [{}]: '.format(
F().bold().magenta(DEFAULT_PORT))))
print()
# Sets the feedback animation thread...
thread = Thread(target=ellipsis,
args=(_l('Starting'), F().yellow()),
daemon=True)
# ... and starts it.
thread.start()
try:
# Binds the port number to the server and tries to connect.
server.connect(port=port)
# Ctrl+C pressed.
except (EOFError, KeyboardInterrupt):
# Stops the feedback animation thread.
thread.alive = False
print(_lt(_lt(error('Operation canceled by the user!'))))
press_enter_to('try again', F().red(), F().white())
continue
# Stops the feedback animation thread when the connection is established.
thread.alive = False
print(_lt(_lt(success('Server started successfully!'))))
press_enter_to('continue', F().green(), F().white())
break
# Port is not valid.
except InvalidPortError:
err = 'The provided port number is invalid!'
# Port is already in use.
except PortAlreadyUsedError as _e:
err = 'The port number {:d} is already in use!'.format(_e.port)
# Port number out of range.
except PortOutOfRangeError:
err = 'The port number must be between 0 and 65535!'
# Stops the feedback animation thread.
thread.alive = False
print(_lt(_lt(error(err))))
press_enter_to('try again', F().red(), F().white())
server.log(F().green(title(clear_screen=False)))
# Gets the connection address.
host, port = server.address()
# Shows the address in the log.
server.log(
_lt(
label(F().bold().green(
'Connection established at {}:{}!'.format(host, port)))))
# Info message.
server.log(_lt(label(F().cyan('Recording audio through microphone'))))
server.log(_lt(label(F().bold().blue('Press Ctrl+C to shutdown'))))
try:
# Runs this until Ctrl+C is pressed.
while True:
# Accepts a new client.
client = server.hello()
# Starts the thread that handles this client.
Thread(target=handle_client,
args=(
server,
client,
),
daemon=True).start()
# Ctrl+C pressed.
except (EOFError, KeyboardInterrupt):
server.log(_ltb(label(error('Closing connection...'))))
# Shutdowns the server.
server.disconnect()
press_enter_to('back to main menu', F().red(), F().white())
# Ctrl+C pressed.
except (EOFError, KeyboardInterrupt):
pass
# Shutdowns the server.
server.disconnect()
del server
def client_option() -> None:
"""
"Client" main menu option.
"""
# Instantiates a brand new client.
client = Client()
try:
# Waits for the user to provide the client name.
set_name(client, F().blue())
while True:
print(F().magenta(title()))
print(
_l(F().magenta('Welcome, {}!'.format(F().bold(
client.get_name())))))
print(_ltb('What do you want to do?'))
# Sets the client menu options, with their respective methods.
options = [['Connect to a server', 'connect'],
['Change my name', 'set_name']]
# Lists the options.
for i, option in enumerate(options):
print(_l(label(option[0], F().red(i + 1), F())))
print(_l(label('Quit to main menu', F().red(0), F())))
# Reads the chosen option.
try:
opt = int(input(_lt('Your option: ')))
# Checks whether the option is available.
if opt not in range(0, len(options) + 1):
raise ValueError()
# Invalid or nonexisting option.
except ValueError:
print(_lt(error('Invalid option!')))
press_enter_to('try again', F().red(), F().white())
continue
# If the option is 0, quit to main menu.
if not opt:
break
try:
# If no, runs the corresponding function.
globals()[options[opt - 1][1]](client)
# Ctrl+C pressed.
except (EOFError, KeyboardInterrupt):
pass
# Ctrl+C pressed.
except (EOFError, KeyboardInterrupt):
pass
del client
def connect(client: Client) -> None:
"""
"Connect to a server" client menu option.
---
Arguments
---
client (Client)
The client instance which wants to connect to a server.
"""
# Asks the user for the modulation type until it is valid.
while True:
print(F().magenta(title()))
print(_l(F().magenta('Choose a modulation type.\n')))
# Sets the available modulation types.
options = [
[
'{} - {}'.format(F().bold('AM'),
F().italic('Amplitude Modulation')), AM
],
[
'{} - {}'.format(
F().bold('AM-SC'),
F().italic(
'Amplitude Modulation with Suppressed Carrier')), AM_SC
], [F().italic('No modulation'), NO_MOD]
]
# Lists the options.
for i, option in enumerate(options):
print(_l(label(option[0], F().red(i + 1), F())))
# Reads the chosen option.
try:
opt = int(input(_lt('Your option: ')))
# Checks whether the option is avaliable.
if opt not in range(1, len(options) + 1):
raise ValueError()
# Invalid or nonexisting option.
except ValueError:
print(_lt(error('Invalid option!')))
press_enter_to('try again', F().red(), F().white())
continue
# If the option is 0, go back to client menu.
if not opt:
break
# If no, saves the modulation type in a variable.
modulation = options[opt - 1][1]
# Goes to the next step.
break
# Asks the user for the connection settings until they are valid.
while True:
print(F().magenta(title()))
print(_l(F().magenta('Configure the connection with the server.')))
try:
# Waits for the user to provide the hostname.
host = input(
_lt('Hostname [{}]: '.format(
F().bold().magenta(DEFAULT_HOST))))
# Waits for the user to provide the port number.
port = input(
_l('Port number [{}]: '.format(
F().bold().magenta(DEFAULT_PORT))))
print()
# Sets the feedback animation thread...
thread = Thread(target=ellipsis,
args=(_l('Connecting'), F().yellow()),
daemon=True)
# ... and starts it.
thread.start()
try:
# Tries to connect with the server.
client.connect(modulation, host, port)
# Ctrl+C pressed.
except (EOFError, KeyboardInterrupt):
# Stops the feedback animation thread.
thread.alive = False
print(_lt(_lt(error('Operation canceled by the user!'))))
press_enter_to('try again', F().red(), F().white())
continue
# Stops the feedback animation thread when the connection is established.
thread.alive = False
print(_lt(_lt(success('Connection established!'))))
press_enter_to('continue', F().green(), F().white())
# Sends a confirmation of receiving to the server.
client.send_str('OK')
break
# Connection with the server was refused.
except ConnectionRefusedError:
err = 'The connection with this server was refused!'
# Connection timeout.
except ConnectionTimeoutError:
err = 'The connection attempt has timed out!'
# Port is not valid.
except InvalidPortError:
err = 'Invalid port number!'
# Unknown or nonexistent host.
except UnknownHostError:
err = 'Unknown host!'
# Stops the feedback animation thread.
thread.alive = False
print(_lt(_lt(error(err))))
press_enter_to('try again', F().red(), F().white())
# Receives some informations and instructions from the server.
client.log(client.recv_str())
client.log(client.recv_str())
# Opens a new speaker.
with sd.OutputStream(blocksize=CHUNK_SIZE,
channels=CHANNELS,
dtype=np.int16,
samplerate=FRAME_RATE) as speaker:
try:
# Receives the first package.
package = client.recv()
# Wait for new packages from the server while they are not empty.
while len(package) != 0:
# Gets the audio from the package.
received = M(modulation, package)
# If the client chosen no modulated audio,...
if modulation == NO_MOD:
# ... then just speaks the original package...
speaker.write(received.output())
# ... and receives the next one.
package = client.recv()
continue
# Demodulates the received audio.
demodulated = received.demodulate()
# Filters the demodulated audio.
filtered = demodulated.lowpass()
# Outputs the filtered audio in the speaker.
speaker.write(filtered.output())
# Receives the next package.
package = client.recv()
# Logs the server shutdown.
client.log(_ltb(label(error('The server has been shut down!'))))
# The server has shut down.
except ConnectionResetError:
# Logs the server shutdown.
client.log(_ltb(label(error('The server has been shut down!'))))
# Ctrl+C pressed.
except (EOFError, KeyboardInterrupt):
# Logs the client disconnecting.
client.log(_ltb(label(error('Disconnecting from the server...'))))
# Disconnects from the server.
client.disconnect()
press_enter_to('back to the client menu', F().red(), F().white())
while True:
print(F().blue(header()))
if _video_file is None:
# Let the user set the input video file.
_video_file = input(input_message)
else:
# Print in case of passing by argument.
print('{}{}'.format(input_message, _video_file))
# Invalid input.
if not _video_file:
print(_lt(error('Invalid input!')))
press_enter_to('try again', F().red(), F().white())
_video_file = None
continue
# Input is not a file.
if not path.isfile(_video_file):
print(_lt(error('The input path is not a valid file!')))
press_enter_to('try again', F().red(), F().white())
_video_file = None
continue