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index.js
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index.js
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"use strict";
var Service, Characteristic, HomebridgeAPI;
var exec = require('child_process').exec;
var inherits = require('util').inherits;
module.exports = function(homebridge) {
Service = homebridge.hap.Service;
Characteristic = homebridge.hap.Characteristic;
HomebridgeAPI = homebridge;
homebridge.registerAccessory("homebridge-cmdtriggerswitch", "CmdTriggerSwitch", CmdTriggerSwitch);
}
function keepIntInRange(num, min, max){
const parsed = parseInt(num);
return Math.min(Math.max(parsed, min), max);
}
function CmdTriggerSwitch(log, config) {
this.log = log;
this.timeout = -1;
this.restoredFromCacheState = false;
this.remainingDelay = 0;
// Setup Configuration
//
this.setupConfig(config);
// Persistent Storage
//
this.cacheDirectory = HomebridgeAPI.user.persistPath();
this.storage = require('node-persist');
this.storage.initSync({dir:this.cacheDirectory, forgiveParseErrors: true});
// Setup Services
//
this.createSwitchService();
this.createAccessoryInformationService();
}
CmdTriggerSwitch.prototype.setupConfig = function(config) {
this.name = config.name;
this.onCmd = config.onCmd;
this.offCmd = config.offCmd;
this.stateful = config.stateful ? config.stateful : false;
this.delay = config.delay ? parseInt(config.delay) : 1000;
this.delayUnit = config.delayUnit ? config.delayUnit : "ms";
this.interactiveDelay = false;
if (config.interactiveDelaySettings !== undefined) {
this.interactiveDelay = config.interactiveDelaySettings.interactiveDelay ? config.interactiveDelaySettings.interactiveDelay : false;
this.interactiveDelayLabel = config.interactiveDelaySettings.interactiveDelayLabel ? config.interactiveDelaySettings.interactiveDelayLabel : "Delay";
this.delayMin = config.interactiveDelaySettings.delayMin ? parseInt(config.interactiveDelaySettings.delayMin) : 100;
this.delayMax = config.interactiveDelaySettings.delayMax ? parseInt(config.interactiveDelaySettings.delayMax) : 1000;
this.delayStep = config.interactiveDelaySettings.delayStep ? parseInt(config.interactiveDelaySettings.delayStep) : 100;
}
if (this.delayMax <= this.delayMin) {
throw new Error('Invalid configuration: delayMin must be smaller than delayMax');
}
if (this.delayStep >= (this.delayMax - this.delayMin)) {
throw new Error('Invalid configuration: delayStep must be smaller than (delayMax - delayMin)');
}
this.delayFactor = 1;
switch(this.delayUnit) {
case "ms":
this.delayFactor = 1;
break;
case "s":
this.delayFactor = 1000;
break;
case "min":
this.delayFactor = 60*1000;
break;
default:
throw new Error('Invalid configuration: Unknown delayUnit (must be "ms", "s" or "min")');
break;
}
}
CmdTriggerSwitch.prototype.createSwitchService = function() {
this.switchService = new Service.Switch(this.name);
this.switchService.getCharacteristic(Characteristic.On)
.on('set', this.switchSetOn.bind(this));
if (this.interactiveDelay && !this.stateful) {
const label = `${this.interactiveDelayLabel} (${this.delayUnit})`;
const minVal = this.delayMin;
const maxVal = this.delayMax;
const step = this.delayStep;
Characteristic.Delay = function() {
const props = {
format: Characteristic.Formats.UINT64,
minValue: minVal,
maxValue: maxVal,
minStep: step,
perms: [Characteristic.Perms.READ, Characteristic.Perms.WRITE, Characteristic.Perms.NOTIFY]
};
// var label = theLabel;
Characteristic.call(this, label, '8728b5cc-5c49-4b44-bb25-a4c4d4715779', props);
this.value = this.getDefaultValue();
};
inherits(Characteristic.Delay, Characteristic);
Characteristic.Delay.UUID = '8728b5cc-5c49-4b44-bb25-a4c4d4715779';
this.switchService.addCharacteristic(Characteristic.Delay);
this.switchService.getCharacteristic(Characteristic.Delay)
.on('set', this.switchSetDelay.bind(this));
const cachedInteractiveDelay = this.storage.getItemSync(`${this.name} - interactiveDelay`);
if(cachedInteractiveDelay === undefined) {
const cid = keepIntInRange(this.delay, this.delayMin, this.delayMax);
this.switchService.setCharacteristic(Characteristic.Delay, cid);
} else {
const cid = keepIntInRange(cachedInteractiveDelay, this.delayMin, this.delayMax);
this.switchService.setCharacteristic(Characteristic.Delay, cid);
this.delay = cid;
}
}
if (this.stateful) {
const cachedState = this.storage.getItemSync(this.name);
if((cachedState === undefined) || (cachedState === false)) {
if (cachedState === false) {
this.restoredFromCacheState = true;
}
this.switchService.setCharacteristic(Characteristic.On, false);
} else {
this.restoredFromCacheState = true;
this.switchService.setCharacteristic(Characteristic.On, true);
}
} else {
const cachedStartTime = this.storage.getItemSync(`${this.name} - startTime`);
if (cachedStartTime !== undefined) {
const diffTime = Date.now() - cachedStartTime;
this.log('diffTime: ' + diffTime/1000 + 's');
if (diffTime > 0 && diffTime < this.delay*this.delayFactor) {
this.remainingDelay = this.delay*this.delayFactor - diffTime;
this.switchService.setCharacteristic(Characteristic.On, true);
}
}
}
}
CmdTriggerSwitch.prototype.createAccessoryInformationService = function() {
this.accessoryInformationService = new Service.AccessoryInformation()
.setCharacteristic(Characteristic.Name, this.name)
.setCharacteristic(Characteristic.Manufacturer, 'hans-1')
.setCharacteristic(Characteristic.Model, 'Command Trigger Switch');
}
CmdTriggerSwitch.prototype.getServices = function() {
return [this.accessoryInformationService, this.switchService];
}
CmdTriggerSwitch.prototype.switchSetOn = function(on, callback) {
this.log("Setting switch to " + on);
if (this.stateful) {
this.storage.setItemSync(this.name, on);
} else {
if (on) {
let delayMs = this.remainingDelay;
if (delayMs <= 0) {
delayMs = this.delay*this.delayFactor;
this.storage.setItemSync(`${this.name} - startTime`, Date.now());
}
this.log("Delay in ms: " + delayMs);
this.timeout = setTimeout(function() {
this.switchService.setCharacteristic(Characteristic.On, false);
}.bind(this), delayMs);
} else {
if (this.timeout !== -1) {
clearTimeout(this.timeout);
}
}
}
if (this.restoredFromCacheState) {
this.log(`Restored switch state to ${on} after restart.`);
this.restoredFromCacheState = false;
} else if (this.remainingDelay > 0) {
this.log(`Restored switch state to ${on} after restart, remaining delay ${this.remainingDelay}ms`);
this.remainingDelay = 0;
} else {
if (on) {
if (this.onCmd !== undefined) {
this.log("Executing ON command: '" + this.onCmd + "'");
exec(this.onCmd);
}
} else {
if (this.offCmd !== undefined) {
this.log("Executing OFF command: '" + this.offCmd + "'");
exec(this.offCmd);
}
}
}
callback();
}
CmdTriggerSwitch.prototype.switchSetDelay = function(delay, callback) {
// this.log(`${this.interactiveDelayLabel}: ${delay}${this.delayUnit}`);
this.delay = delay;
this.storage.setItemSync(`${this.name} - interactiveDelay`, delay);
callback();
}