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client.js
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client.js
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"use strict";
var util = require('util');
var WebSocket = require('ws');
var EventEmitter = require('events').EventEmitter;
var debug = require('debug')('almond-client');
var randomstring = require("randomstring");
var deviceProps = require("./deviceProperties.js");
var AlmondClient = module.exports = function(config) {
EventEmitter.call(this);
this.host = config.host;
this.port = config.port;
this.username = config.username;
this.password = config.password;
var url = util.format("ws://%s:%s/%s/%s", this.host, this.port, this.username, this.password)
this.ws = new WebSocket(url);
this.wsEmitter = new WebSocketEmitter();
this._devices = {};
var self = this;
this.ws.on('open', function open() {
self._getGeviceList();
self.once("gotDeviceList", function() {
self.emit("ready");
});
});
this.ws.on('message', this._recvMessage.bind(this));
this.wsEmitter.on("dynamicMessage", this._processDynamicMessage.bind(this));
}
util.inherits(AlmondClient, EventEmitter);
AlmondClient.DEVICE_TYPE = require("./deviceTypes.js")
AlmondClient.prototype.getDevices = function() {
var devices = [];
for (var device in this._devices) {
devices.push(this._devices[device]);
}
return devices;
}
AlmondClient.prototype.getDeviceById = function(id) {
return this._devices[id];
}
AlmondClient.prototype._getGeviceList = function() {
var self = this;
this._sendMessage({
"CommandType":"DeviceList"
}, function(err, data) {
var devices = data.Devices;
for (var deviceID in devices) {
if (!(devices[deviceID].ID in self._devices)) {
self._addDevice(devices[deviceID]);
}
}
self.emit("gotDeviceList")
});
}
AlmondClient.prototype._processDynamicMessage = function(message) {
debug("Got dynamicMessage", message);
switch(message.CommandType) {
case "DynamicIndexUpdated":
this._processDeviceUpdate(message);
break;
default:
debug("Didn't understand message");
}
}
AlmondClient.prototype._processDeviceUpdate = function(message) {
debug("Got device update msg", message)
var devices = message.Devices;
for (var deviceID in devices) {
var deviceValues = devices[deviceID].DeviceValues;
var device = this._devices[deviceID];
for (var index in deviceValues) {
device.updateProp(index, deviceValues[index].Value);
}
}
}
AlmondClient.prototype._addDevice = function(devData) {
debug("Adding device", devData);
var device = new AlmondDevice(this, devData);
this._devices[device.id] = device;
this.emit("deviceAdded", device);
}
AlmondClient.prototype._sendMessage = function(json, cb) {
var mii = randomstring.generate();
json["MobileInternalIndex"] = mii;
var msg = JSON.stringify(json);
this.ws.send(msg);
debug("Message Sent", msg);
this.wsEmitter.on(mii, cb.bind(this));
}
AlmondClient.prototype._recvMessage = function(message) {
debug("Message Recved", message);
var json = JSON.parse(message);
var mii = json["MobileInternalIndex"];
if (typeof mii === "undefined") {
debug("Got dynamic message");
this.wsEmitter.emit("dynamicMessage", json);
} else {
this.wsEmitter.emit(mii, null, json);
}
}
var AlmondDevice = function(client, config) {
EventEmitter.call(this);
this.client = client;
this.id = config.Data.ID;
this.name = config.Data.Name;
this.type = config.Data.Type;
this.location = config.Data.location;
this.manufacturer = config.Data.Manufacturer || "Unknown Manufacturer";
this.model = config.Data.Model || "Unknown Model";
this.props = deviceProps[this.type];
this._deviceValues = {};
for (var id in config.DeviceValues) {
this._deviceValues[id] = {
id: id,
name: config.DeviceValues[id].Name,
value: config.DeviceValues[id].Value
};
}
}
util.inherits(AlmondDevice, EventEmitter);
AlmondDevice.prototype.setProp = function(prop, value, cb) {
var self = this;
this.client._sendMessage({
"CommandType":"UpdateDeviceIndex",
"ID": this.id,
"Index": prop,
"Value": value
}, function(err, message) {
if (message.Success) {
debug("Successfully sent property [%s] update [%s]", prop, value)
var waitForDevicePropUpdate = function(propUpdated, newValue) {
if (propUpdated == prop) {
self.removeListener('valueUpdated', waitForDevicePropUpdate);
cb(newValue);
}
}
if (cb) {
self.prependListener('valueUpdated', waitForDevicePropUpdate);
}
}
});
}
AlmondDevice.prototype.getProp = function(prop) {
return this._deviceValues[prop].value;
}
AlmondDevice.prototype.updateProp = function(prop, value) {
if (typeof this._deviceValues[prop] === "undefined") return;
if (this._deviceValues[prop].value === value) return;
debug("Updating value", prop, "from", this._deviceValues[prop].value, "to", value);
this._deviceValues[prop].value = value;
this.emit("valueUpdated", prop, value);
}
var WebSocketEmitter = function() {
EventEmitter.call(this);
}
util.inherits(WebSocketEmitter, EventEmitter);