def on_mqtt_message (client, userdata, message):
try:
jstatus = extract_status (message)
if (jstatus is not None): # TODO: should you have a costly exception setup in mqtt thread?
socketio.emit (SERVER_EVENT, jstatus) # move this to a worker thread
except Exception as e:
print ('* EXCEPTION 3: ', str(e))
def set_device_status():
try:
if (request.method=='GET'):
jcmd = {
'device_id' : request.args.get('device_id'),
'relsen_id': request.args.get('relsen_id'),
'action' : request.args.get('action')
}
else: # it can only be a 'POST'
if (request.json is None):
return ({'result' : False, 'error':'invalid device'})
jcmd = request.json
print (jcmd)
socketio.emit (ACK_EVENT, jcmd) # must be a json object, to avoid messy client side escape characters
topic = '{}/{}/{}'.format (PUB_PREFIX, jcmd['device_id'], jcmd['relsen_id'])
if SIMULATION_MODE:
devid = jcmd['device_id']
if (devid not in simul_status):
return ({'result' : False, 'error' : 'invalid or disabled device_id'})
operate_simul_device (devid, jcmd['relsen_id'], jcmd['action'].lower()) # this will return the new status
retval = {devid : simul_status[devid] }
else:
mqtt.publish (topic, jcmd['action'])
if in_mem_status is None:
send_tracer_broadcast() # to build the status
return {'result' : False, 'error' : 'in-memory status is not available; please try again'}
if (devid not in in_mem_status):
return ({'result' : False, 'error' : 'invalid or disabled device_id'})
retval = {devid : in_mem_status[devid]} # this may only return the last known status **
return retval
except Exception as e:
print ('* EXCEPTION 7: ', str(e))
return ({'result' : False, 'error' : 'could not operate device'})
def on_socket_message (message):
print ('pass-through message: ', message)
jcmd = json.loads (message)
try:
mqtt.publish (jcmd.get('topic'), jcmd.get('payload'))
socketio.emit (ACK_EVENT, jcmd) # must be a json object, to avoid messy client side escape characters
except Exception as e:
print ('* EXCEPTION 6: ', str(e))
def update_sensor_reading (device_id, str_msg): # TODO: save it in in-memory status (and later, in the database)
#try:
dprint ('sensor reading for: ', device_id)
dprint (str_msg)
jsensor = json.loads(str_msg)
in_mem_status[devid][SENSOR_RELSEN] = jsensor['StatusSNS'] # this is stored as an inner json
jstatus = {'device_id' : device_id, 'relsen_id' : SENSOR_RELSEN, 'status' : jsensor['StatusSNS']}
socketio.emit (SERVER_EVENT, jstatus)
def on_mqtt_message(client, userdata, message):
#print ("MQTT msg: ", message.payload.decode())
jstatus = extract_status(message)
if (jstatus is not None):
try:
socketio.emit(SERVER_EVENT, jstatus)
except Exception as e:
print('* EXCEPTION 3: ', str(e))
def operate_simul_device(devid, relsid, action):
new_status = ON
if (action.upper() == 'TOGGLE'):
if (simul_status[devid][relsid] == ON):
new_status = OFF
else:
new_status = action.upper() # it was 'on' or 'off' command
simul_status[devid][relsid] = new_status
jstatus = {'device_id': devid, 'relsen_id': relsid, 'status': new_status}
socketio.emit(SERVER_EVENT, jstatus)
def send_simul_status(): # to start a new socket client in the correct status in simulation mode
if not SIMULATION_MODE:
print ('Not in simulation mode: cannot simulate status')
return
#dprint ('sending simulated initial status...')
for devid in simul_status:
jstatus = {'device_id': devid}
for rsid in simul_status[devid]:
jstatus['relsen_id'] = rsid
jstatus['status'] = simul_status[devid][rsid]
socketio.emit (SERVER_EVENT, jstatus)
def save_sensor_reading(device_id,
str_msg): # TODO: save it in in-memory status
#try:
print('sensor reading: ', device_id, str_msg)
jsensor = json.loads(str_msg)
jstatus = {
'device_id': device_id,
'relsen_id': SENSOR_RELSEN,
'status': jsensor['StatusSNS']
}
socketio.emit(SERVER_EVENT, jstatus)
def on_socket_event (payload):
print ('command: ', payload)
jcmd = json.loads (payload)
try:
socketio.emit (ACK_EVENT, jcmd) # must be a json object, to avoid messy client side escape characters
topic = '{}/{}/{}'.format (PUB_PREFIX, jcmd['device_id'], jcmd['relsen_id'])
if SIMULATION_MODE:
operate_simul_device (jcmd['device_id'], jcmd['relsen_id'], jcmd['action'].lower())
else:
mqtt.publish (topic, jcmd['action'])
except Exception as e:
print ('* EXCEPTION 5: ', str(e))
def send_offline_notification(devid):
print('sending offline notification for: ', devid)
for rs in in_mem_relsens[devid]:
msg = {'device_id': devid, 'relsen_id': rs, 'status': OFFLINE}
socketio.emit(SERVER_EVENT, msg)
