class Receiver:
def __init__(self):
# Symbolic name meaning all available interfaces
self.host = ''
# IP address for the ambulance
self.ip = 'localhost'
self.port = 10000
# Create a UDP socket
self.sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
# Bind socket to local host and port
self.sock.bind((self.host, self.port))
# Queue with the two last data objects received
self.position_history = deque()
self.current_data = None
self.format_dict = dict.fromkeys(
['timestamp', 'longitude', 'latitude'])
self.process_data = ProcessData()
def add_to_queue(self, dict_insert):
'''Add received element to the receiver queue.
Keyword arguments:
dict_insert -- dict containing GPS data and timestamp
'''
self.position_history.append(dict_insert)
def notify_process_data(self):
'''Notifies process_data when receiving data from sender'''
if len(self.position_history) > 1:
self.process_data.notify(self.get_data())
def get_data(self):
'''Returns the two last datasets from position_history'''
if len(self.position_history) > 1:
new_amb = self.position_history.popleft()
old_amb = self.position_history.popleft()
self.position_history.appendleft(old_amb)
return [new_amb, old_amb]
def receive(self):
'''Receive data and convert bytes to string.'''
try:
# Listen until terminated by user
while True:
rawdata, addr = self.sock.recvfrom(1024)
data = rawdata.decode(encoding='UTF-8')
# Convert data to dictionary
acceptable_string = data.replace("'", "\"")
data = json.loads(acceptable_string)
self.add_to_queue(data)
self.notify_process_data()
if not data:
break
except (KeyboardInterrupt):
print("Closing socket")
self.sock.close()
class Receiver:
def __init__(self):
# Symbolic name meaning all available interfaces
self.host = ''
# IP address for the ambulance
self.ip = 'localhost'
self.port = 10000
# Create a UDP socket
self.sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
# Bind socket to local host and port
self.sock.bind((self.host, self.port))
# Queue with the two last data objects received
self.position_history = deque()
self.current_data = None
self.format_dict = dict.fromkeys(['timestamp', 'longitude',
'latitude'])
self.process_data = ProcessData()
def add_to_queue(self, dict_insert):
'''Add received element to the receiver queue.
Keyword arguments:
dict_insert -- dict containing GPS data and timestamp
'''
self.position_history.append(dict_insert)
def notify_process_data(self):
'''Notifies process_data when receiving data from sender'''
if len(self.position_history) >1:
self.process_data.notify(self.get_data())
def get_data(self):
'''Returns the two last datasets from position_history'''
if len(self.position_history) > 1:
new_amb = self.position_history.popleft()
old_amb = self.position_history.popleft()
self.position_history.appendleft(old_amb)
return [new_amb, old_amb]
def receive(self):
'''Receive data and convert bytes to string.'''
try:
# Listen until terminated by user
while True:
rawdata, addr = self.sock.recvfrom(1024)
data = rawdata.decode(encoding='UTF-8')
# Convert data to dictionary
acceptable_string = data.replace("'","\"")
data = json.loads(acceptable_string)
self.add_to_queue(data)
self.notify_process_data()
if not data:
break
except(KeyboardInterrupt):
print("Closing socket")
self.sock.close()
