77 lines
2.5 KiB
Python
77 lines
2.5 KiB
Python
import sys
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import json
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from flask_mqtt import Mqtt
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import app.devices as devices
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class MqttClient:
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__initialized = False
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mqtt = Mqtt()
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# Mqtt setup
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@staticmethod
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def setup(app):
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if not MqttClient.__initialized:
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MqttClient.mqtt.init_app(app)
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MqttClient.mqtt.client.on_message = MqttClient.handle_mqtt_message
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MqttClient.mqtt.client.on_subscribe = MqttClient.handle_subscribe
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MqttClient.mqtt.client.on_publish = MqttClient.handle_publish
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MqttClient.__initialized = True
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@MqttClient.mqtt.on_connect()
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def handle_connect(client, userdata, flags, rc):
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print('MQTT client connected')
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MqttClient.mqtt.subscribe('device/+')
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@MqttClient.mqtt.on_disconnect()
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def handle_disconnect():
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print('MQTT client disconnected')
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@MqttClient.mqtt.on_log()
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def handle_logging(client, userdata, level, buf):
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print(level, buf)
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print('MQTT client initialized')
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@staticmethod
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def tear_down():
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if MqttClient.__initialized:
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MqttClient.mqtt.unsubscribe_all()
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if (hasattr(MqttClient.mqtt, 'client') and
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MqttClient.mqtt.client is not None):
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MqttClient.mqtt.client.disconnect()
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print('MQTT client destroyed')
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@staticmethod
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def handle_subscribe(client, userdata, mid, granted_qos):
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print('MQTT client subscribed')
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@staticmethod
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def handle_mqtt_message(client, userdata, message):
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print("Received message!")
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print("Topic: " + message.topic)
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print("Payload: " + message.payload.decode())
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try:
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# If type is JSON
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devices.create_recording(
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MqttClient.get_device_id(message.topic),
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json.loads(message.payload.decode()))
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except Exception:
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print("ERROR!")
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error_type, error_instance, traceback = sys.exc_info()
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print("Type: " + str(error_type))
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print("Instance: " + str(error_instance))
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return
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@staticmethod
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def handle_publish(client, userdata, mid):
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print("Published message! (" + str(mid) + ")")
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@staticmethod
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def get_device_id(topic):
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device_token, device_id = topic.split("/")
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if device_token == "device":
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return int(device_id)
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else:
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raise ValueError("Topic is in invalid format")
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