mqtt_server/lib/mqtt/mqttClient.js

'use strict';
const mqtt = require('mqtt');
const request = require('request');
let util = require('util');
const logger = require('log4js').getLogger();

// Var db = require('../server/db-connector').dbConnection;

// var nano = require('nano')('http://martind2000:1V3D4m526i@localhost:5984');
// var nano = require('nano')('http://localhost:5984');

// let db_name = 'mqtt';
// var dbCouch = nano.use(db_name);

let globalMode = 'FanOff';

let lastDispatch = 0;


const mqttClient = function(events) {

  const orgId = '';
  const userName = '';
  const appKey = 'bob';

  this.livingRoom = {
    temp: 0,
    last: 0,
    data: []
  };
  this.ranges = {
    day: {low: 19.5, high: 22.5, max: 22.7},
    night: {low: 18.5, high: 20.5, max: 20.7}
  };

  this.first = false;
  this.maxLength = 540;

  let mode = 'FanOff';

  const d = new Date();
  this.lastMsg = d.getTime();

  events.on('sendIFTTT', function(mode) {
    let d;
    const url = ['https://maker.ifttt.com/trigger/', mode, '/with/key/cWvECkeiyAPwmiOPBkXL2D'].join('');

    if (mode !== globalMode) {
      logger.info('Go for change state', mode);
      globalMode = mode;
      logger.debug('Global Mode now A:', globalMode);
      /* Request(url, function (error, response, body) {
        logger.debug(response, body);
      }); */

      events.emit('changeState', mode === 'FanOn' ? 1:0);

      d = new Date();
      lastDispatch = d.getTime();
    } else {
      logger.warn('Not sent...');
    }
  });

  this.updateGlobal = function(newStatus) {
      globalMode = (newStatus === 0) ? 'FanOff' : 'FanOn';
      logger.info('updateGlobal changed to: ', globalMode);
    };

  this.storeData = function(data, alt) {
    if (!this.first) {
      this.first = true;
      return [];
    }
    let target = alt || this.livingRoom.data;
    if (target.length === this.maxLength) {
      target = target.slice(1);
    }
    target.push(data);
    if (alt) {
      return target;
    }
    this.livingRoom.data = target;
  };

  this.logTemp = function() {
    const now = new Date;
    const mod = 60000 - (now.getTime() % 60000);
    this.storeData(this.livingRoom.temp);
    const data = {id: 'graph', data: this.livingRoom.data};
    events.emit('sendSocket', data);

    setTimeout(this.logTemp.bind(this), mod + 10);
  };

  this.fanTimer = function() {

    let n;
    const now = new Date;
    const mod = 900000 - (now.getTime() % 900000);
    const day = now.getDay();
    const daytimeLimits = {low: 27900000, high: 63000000};
    const nowMS = (now.getHours() * 3600000) + (now.getMinutes() * 60000);
    const curRange = (nowMS < 25200000) ? this.ranges.night : this.ranges.day;

    if (globalMode === 'FanOff') {
      logger.info(`Fans off, temp should be  <= ${curRange.low}`);
      mode = (parseFloat(this.livingRoom.temp) <= curRange.low) ? 'FanOn' : 'FanOff';
    } else {
      logger.info(`Fans on, temp should not be less than ${curRange.high}`);
      mode = (parseFloat(this.livingRoom.temp) <= curRange.high) ? 'FanOn' : 'FanOff';
    }

    if ((globalMode !== 'FanOff' || mode !== 'FanOff') && ((day >= 1 && day <= 5) && (nowMS >= daytimeLimits.low && nowMS <= daytimeLimits.high))) {
      logger.info('Week day');
      mode = 'FanOff'
    }

    n = now.getTime() - this.lastMsg;
    logger.info('Last msg', n);

    if (n >= 600000) {
      logger.error('No message received for over 10 minutes');
      mode = 'FanOff';
      logger.warn('Setting quit for 15 seconds.');
      setTimeout(() => {
        throw new error('Ejecting for restart');
      }, 15000);

    }

    logger.info('LR temp:', this.livingRoom.temp);
    const data = {id: 'temperature', data: {mode: globalMode, temp: this.livingRoom.temp}};

    if (this.livingRoom.temp !== 0) {
      events.emit('sendIFTTT', mode);
      events.emit('sendSocket', data);
    }


    setTimeout(this.fanTimer.bind(this), mod + 500);
  };

  this.lighting = 'lights';

  this.connected = false;

  const options = {
    keepalive: 3600,
    clientId: 'a:' + orgId + ':' + Date.now(),
    username: userName,
    password: new Buffer(appKey)

  };

  this.client = mqtt.connect('mqtt://' + orgId + 'silvrtree.co.uk', options);

  this.client.on('connect', function() {
    this.connected = true;
    logger.info('Connected to Silvr Broker');
    this.fanTimer();
    this.logTemp();
  }.bind(this));

  this.client.subscribe('livingroomTemp');

  this.client.on('updateState', function(newStatus) {
    globalMode = (newStatus === 0) ? 'FanOff' : 'FanOn';
    logger.info('updateState changed to: ', globalMode);
  });

  this.client.on('message', function(topic, message) {
    const now = new Date;
    const nowMS = (now.getHours() * 3600000) + (now.getMinutes() * 60000);
    const curRange = (nowMS < 25200000) ? this.ranges.night : this.ranges.day;
    const json = JSON.parse(message.toString());
    logger.debug(json);
    logger.debug(json.temp);

    this.livingRoom.temp = parseFloat(json.temp);
    logger.info('lr:', this.livingRoom.temp, this.livingRoom.temp >= curRange.max);

    if (this.livingRoom.temp >= curRange.max) {
      logger.warn('Max temp reached, turn off');
      events.emit('sendIFTTT', 'FanOff');
    }
    const d = new Date();
    this.lastMsg = d.getTime();

    const data = {id: 'temperature', data: {mode: globalMode, temp: this.livingRoom.temp}};
    events.emit('sendSocket', data);

  }.bind(this));

  this.isConnected = function() {
    return this.connected;
  };

};

module.exports.mqttClient = mqttClient;