def get_alive_device_n() -> str:
devices: list[db.Device] = db.select_devices()
return str(
sum(
dt.datetime.now(tz=dt.timezone(offset=dt.timedelta(hours=9)))
- device.last_heartbeat_timestamp
< dt.timedelta(hours=24)
for device in devices
)
)
def json_last_signal_ts() -> JSONResponse:
devices: list[Device] = db.select_devices()
devices = [device.dict() for device in devices]
for device in devices:
device['last_heartbeat_timestamp'] = str(
device['last_heartbeat_timestamp'])
retval = {
'devices': devices,
'heartbeat_log': db.select_heartbeat_log_summation(),
}
return JSONResponse(jsonable_encoder(retval))
def get_device_name_randomly() -> str:
devices = db.select_devices()
if len(devices) == 0:
return ''
return random.choice(devices).device_name
def get_device_n() -> str:
return str(len(db.select_devices()))
def get_available_device_n() -> str:
devices: list[db.Device] = db.select_devices()
return str(
sum(device.is_active for device in devices)
)