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socket_adapter.js
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socket_adapter.js
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// socket_adapter.js
var mqtt = require('mqtt');
var DEFAULT_HOST = process.env.MQTT_HOST || 'test.mosquitto.org';
var adapter = {
nom: 'adapter',
handlers: {
'sensors/buttonup': function(message) {
message = message.toString();
console.log('adapter: buttonup message: ', message);
var id = message.split(':')[0];
if (this.socketEmit) {
console.log('emit message: gpio/button');
this.socketEmit('gpio/button', {
input_id: id,
detail: message
});
} else {
console.log('no emitter to relay button_1 event');
}
},
'sensors/inrange': function(message) {
message = message.toString();
console.log('adapter: inrange message: ', message);
var id = message.split(':')[0];
if (this.socketEmit) {
this.socketEmit('gpio/rangechange', {
input_id: id,
detail: message
});
} else {
console.log('no emitter to relay event');
}
},
'test': function(message) {
console.log('test message: ', message.toString());
},
},
connect: function(opts) {
opts = opts || {};
console.log('socket_adapter: connect');
var host = opts.host || DEFAULT_HOST;
var mqttClient = this.mqttClient = mqtt.connect('mqtt://' + host);
var topics = Object.keys(this.handlers);
this.socketEmit = opts.emit;
mqttClient.on('connect', function () {
console.log('connected on: ' + host, 'subscribing to topics: ' + topics.join(','));
mqttClient.unsubscribe(topics);
mqttClient.subscribe(topics);
});
mqttClient.on('message', function (topic, message) {
// message is Buffer
console.log('adapter: got message on topic:', topic, message);
if (typeof this.handlers[topic] === 'function') {
this.handlers[topic].call(this, message);
} else {
console.log('unregistered topic: ' + topic, message.toString());
}
}.bind(this));
}
};
module.exports = adapter;