class Backend:
_instance = None
def __init__(self):
self._init_websocket()
self._load_user_preferences()
self._init_resources()
@staticmethod
def _init_websocket():
websocket_started = False
while not websocket_started:
try:
app.run()
websocket_started = app._started
except AlreadyRunningError:
app.stop()
except (ConnectionRefusedError, TimeoutError):
# Crossbar router not yet accepting connections, let's try again
pass
def _init_resources(self):
self.time = Time()
self.odo = Odometer()
self.kpro = Kpro()
def _load_user_preferences(self):
"""
In order to read only once from the setup file
we will load in memory some user preferences that we are gonna use later on.
"""
self.setup_file = SetupFile()
self.style = Style(
self.setup_file.json.get("style").get("tpsLowerThreshold"),
self.setup_file.json.get("style").get("tpsUpperThreshold"),
self.setup_file.json.get("style").get("elapsedSeconds"),
)
self.iat_unit = self.setup_file.json.get("iat",
{}).get("unit", "celsius")
self.ect_unit = self.setup_file.json.get("ect",
{}).get("unit", "celsius")
self.vss_unit = self.setup_file.json.get("vss", {}).get("unit", "kmh")
self.o2_unit = self.setup_file.json.get("o2", {}).get("unit", "afr")
self.odo_unit = self.setup_file.json.get("odo", {}).get("unit", "km")
self.map_unit = self.setup_file.json.get("map", {}).get("unit", "bar")
self.an0_unit = self.setup_file.json.get("an0",
{}).get("unit", "volts")
self.an1_unit = self.setup_file.json.get("an1",
{}).get("unit", "volts")
self.an2_unit = self.setup_file.json.get("an2",
{}).get("unit", "volts")
self.an3_unit = self.setup_file.json.get("an3",
{}).get("unit", "volts")
self.an4_unit = self.setup_file.json.get("an4",
{}).get("unit", "volts")
self.an5_unit = self.setup_file.json.get("an5",
{}).get("unit", "volts")
self.an6_unit = self.setup_file.json.get("an6",
{}).get("unit", "volts")
self.an7_unit = self.setup_file.json.get("an7",
{}).get("unit", "volts")
self.an0_formula = self.setup_file.get_formula("an0")
self.an1_formula = self.setup_file.get_formula("an1")
self.an2_formula = self.setup_file.get_formula("an2")
self.an3_formula = self.setup_file.get_formula("an3")
self.an4_formula = self.setup_file.get_formula("an4")
self.an5_formula = self.setup_file.get_formula("an5")
self.an6_formula = self.setup_file.get_formula("an6")
self.an7_formula = self.setup_file.get_formula("an7")
def update(self):
""" load the websocket with updated info """
if not self.kpro.status: # if kpro is down try to reconnect
self.kpro.find_and_connect()
self.odo.save(self.kpro.vss["kmh"])
self.style.update(self.kpro.tps)
publish(
"data",
{
"bat": self.kpro.bat,
"gear": self.kpro.gear,
"iat": self.kpro.iat[self.iat_unit],
"tps": self.kpro.tps,
"ect": self.kpro.ect[self.ect_unit],
"rpm": self.kpro.rpm,
"vss": self.kpro.vss[self.vss_unit],
"o2": self.kpro.o2[self.o2_unit],
"cam": self.kpro.cam,
"mil": self.kpro.mil,
"fan": self.kpro.fanc,
"bksw": self.kpro.bksw,
"flr": self.kpro.flr,
"eth": self.kpro.eth,
"scs": self.kpro.scs,
"fmw": self.kpro.firmware,
"map": self.kpro.map[self.map_unit],
"an0": self.an0_formula(
self.kpro.analog_input(0))[self.an0_unit],
"an1": self.an1_formula(
self.kpro.analog_input(1))[self.an1_unit],
"an2": self.an2_formula(
self.kpro.analog_input(2))[self.an2_unit],
"an3": self.an3_formula(
self.kpro.analog_input(3))[self.an3_unit],
"an4": self.an4_formula(
self.kpro.analog_input(4))[self.an4_unit],
"an5": self.an5_formula(
self.kpro.analog_input(5))[self.an5_unit],
"an6": self.an6_formula(
self.kpro.analog_input(6))[self.an6_unit],
"an7": self.an7_formula(
self.kpro.analog_input(7))[self.an7_unit],
"time": self.time.get_time(),
"odo": self.odo.get_mileage()[self.odo_unit],
"style": self.style.status,
"ver": __version__,
},
)
def _setup(self):
return self.setup_file.load_setup()
def _save(self, new_setup):
self.setup_file.save_setup(new_setup)
self.setup_file.rotate_screen(new_setup["screen"]["rotate"])
publish(
"refresh") # refresh the frontend so the new changes are applied
self._load_user_preferences() # refresh the backend too
def _reset(self):
self.setup_file.reset_setup()
publish(
"refresh") # refresh the frontend so the new changes are applied
self._load_user_preferences() # refresh the backend too
@classmethod
def get(cls):
""" get the running instance of Backend class or instantiate it for first time """
if cls._instance is None:
cls._instance = cls()
return cls._instance
@classmethod
def setup(cls):
return cls.get()._setup()
@classmethod
def save(cls, new_setup):
cls.get()._save(new_setup)
@classmethod
def reset(cls):
cls.get()._reset()
class Backend:
def __init__(self):
self._load_user_preferences()
self._init_resources()
self._init_websocket()
def stop(self):
self.websocket.stop()
def _init_websocket(self):
self.websocket = Websocket(self)
def _init_resources(self):
self.time = Time()
self.odo = Odometer()
self.kpro = Kpro()
def _load_user_preferences(self):
"""
In order to read only once from the setup file
we will load in memory some user preferences that we are gonna use later on.
"""
self.setup_file = SetupFile()
self.style = Style(
self.setup_file.json.get("style").get("tpsLowerThreshold"),
self.setup_file.json.get("style").get("tpsUpperThreshold"),
self.setup_file.json.get("style").get("elapsedSeconds"),
)
self.iat_unit = self.setup_file.json.get("iat",
{}).get("unit", "celsius")
self.ect_unit = self.setup_file.json.get("ect",
{}).get("unit", "celsius")
self.vss_unit = self.setup_file.json.get("vss", {}).get("unit", "kmh")
self.o2_unit = self.setup_file.json.get("o2", {}).get("unit", "afr")
self.odo_unit = self.setup_file.json.get("odo", {}).get("unit", "km")
self.map_unit = self.setup_file.json.get("map", {}).get("unit", "bar")
self.an0_unit = self.setup_file.json.get("an0",
{}).get("unit", "volts")
self.an1_unit = self.setup_file.json.get("an1",
{}).get("unit", "volts")
self.an2_unit = self.setup_file.json.get("an2",
{}).get("unit", "volts")
self.an3_unit = self.setup_file.json.get("an3",
{}).get("unit", "volts")
self.an4_unit = self.setup_file.json.get("an4",
{}).get("unit", "volts")
self.an5_unit = self.setup_file.json.get("an5",
{}).get("unit", "volts")
self.an6_unit = self.setup_file.json.get("an6",
{}).get("unit", "volts")
self.an7_unit = self.setup_file.json.get("an7",
{}).get("unit", "volts")
self.an0_formula = self.setup_file.get_formula("an0")
self.an1_formula = self.setup_file.get_formula("an1")
self.an2_formula = self.setup_file.get_formula("an2")
self.an3_formula = self.setup_file.get_formula("an3")
self.an4_formula = self.setup_file.get_formula("an4")
self.an5_formula = self.setup_file.get_formula("an5")
self.an6_formula = self.setup_file.get_formula("an6")
self.an7_formula = self.setup_file.get_formula("an7")
def update(self):
""" load the websocket with updated info """
if not self.kpro.status: # if kpro is down try to reconnect
self.kpro.find_and_connect()
self.odo.save(self.kpro.vss["kmh"])
self.style.update(self.kpro.tps)
return {
"bat": self.kpro.bat,
"gear": self.kpro.gear,
"iat": self.kpro.iat[self.iat_unit],
"tps": self.kpro.tps,
"ect": self.kpro.ect[self.ect_unit],
"rpm": self.kpro.rpm,
"vss": self.kpro.vss[self.vss_unit],
"o2": self.kpro.o2[self.o2_unit],
"cam": self.kpro.cam,
"mil": self.kpro.mil,
"fan": self.kpro.fanc,
"bksw": self.kpro.bksw,
"flr": self.kpro.flr,
"eth": self.kpro.eth,
"scs": self.kpro.scs,
"fmw": self.kpro.firmware,
"map": self.kpro.map[self.map_unit],
"an0": self.an0_formula(self.kpro.analog_input(0))[self.an0_unit],
"an1": self.an1_formula(self.kpro.analog_input(1))[self.an1_unit],
"an2": self.an2_formula(self.kpro.analog_input(2))[self.an2_unit],
"an3": self.an3_formula(self.kpro.analog_input(3))[self.an3_unit],
"an4": self.an4_formula(self.kpro.analog_input(4))[self.an4_unit],
"an5": self.an5_formula(self.kpro.analog_input(5))[self.an5_unit],
"an6": self.an6_formula(self.kpro.analog_input(6))[self.an6_unit],
"an7": self.an7_formula(self.kpro.analog_input(7))[self.an7_unit],
"time": self.time.get_time(),
"odo": self.odo.get_mileage()[self.odo_unit],
"style": self.style.status,
"ver": __version__,
}
def setup(self):
"""Return the current setup"""
return self.setup_file.load_setup()
def save(self, new_setup):
"""Save a new setup"""
self.setup_file.save_setup(new_setup)
self.setup_file.rotate_screen(new_setup["screen"]["rotate"])
self._load_user_preferences() # refresh the backend too
def reset(self):
"""Reset to the default setup"""
self.setup_file.reset_setup()
self._load_user_preferences() # refresh the backend too