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app.js
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app.js
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var express = require('express');
var path = require('path');
var favicon = require('serve-favicon');
var logger = require('morgan');
var cookieParser = require('cookie-parser');
var bodyParser = require('body-parser');
var routes = require('./routes/index');
var users = require('./routes/users');
var app = express();
var mc = require('mcprotocol');
var fs = require('fs');
var conn = new mc;
var settings = require('./plc.json');
var seconds1 = 2;var interval1 = seconds1*1000;
var seconds2 = 30;var interval2 = seconds2*1000;
var displayData = null;
var historyData = null;
var lastMin = 0;
var xc = ['xc'];
var positive = ['positive'];
var negative = ['negative'];
connect();
// view engine setup
app.set('views', path.join(__dirname, 'views'));
app.set('view engine', 'jade');
app.set('displayData', displayData);
// uncomment after placing your favicon in /public
//app.use(favicon(path.join(__dirname, 'public', 'favicon.ico')));
app.use(logger('dev'));
app.use(bodyParser.json());
app.use(bodyParser.urlencoded({ extended: false }));
app.use(cookieParser());
app.use(express.static(path.join(__dirname, 'public')));
app.use('/', routes);
app.use('/users', users);
// catch 404 and forward to error handler
app.use(function(req, res, next) {
var err = new Error('Not Found');
err.status = 404;
next(err);
});
// error handlers
// development error handler
// will print stacktrace
if (app.get('env') === 'development') {
app.use(function(err, req, res, next) {
res.status(err.status || 500);
res.render('error', {
message: err.message,
error: err
});
});
}
// production error handler
// no stacktraces leaked to user
app.use(function(err, req, res, next) {
res.status(err.status || 500);
res.render('error', {
message: err.message,
error: {}
});
});
function GetVariableKeys(){
var keys = [];
for(var key in settings.variables){
keys.push(key);
}
return keys;
}
function connect(){
console.log("----------------\n" + new Date());
conn.initiateConnection({port: settings.port, host: settings.ip, ascii: settings.ascii}, connected)
}
function disconnect(){
conn.dropConnection();
}
function read(){
conn.readAllItems(valuesReady);
setTimeout(read,interval1);
}
function connected(err) {
if (typeof(err) !== "undefined") {
// We have an error. Maybe the PLC is not reachable.
console.log(err);
console.log(new Date() + ": Script Failed..\n");
setTimeout(connect, interval2);
}
if(!err){
conn.setTranslationCB(function(tag) {return settings.variables[tag];}); // This sets the "translation" to allow us to work with object names defined in our app not in the module
conn.addItems(GetVariableKeys());
read();
}
}
function FormatDate(d){
var temp = d.replace(/\..+/, '');
temp = temp.replace('T', ' ');
return temp;
}
function valuesReady(anythingBad, values) {
if (anythingBad) {
console.log("SOMETHING WENT WRONG READING VALUES!!!!");
}else{
var date = new Date();
var min = date.getMinutes();
var sec = date.getSeconds();
if((min == 0 || min == 30) && sec < 0){
var year = date.getFullYear();
var month = date.getMonth()+1;
if (month < 10){
month = '0'+month;
}
var day = date.getDate();
if (day < 10){
day = '0'+day;
}
var file = ''+year+month+day+'.json';
if(!fs.existsSync(settings.directory+settings.name)){
fs.mkdirSync(settings.directory+settings.name);
}
if(!fs.existsSync(settings.directory+settings.name+file)){
fs.writeFileSync(settings.directory+settings.name+file, '[]', "utf8");
}
var temp = null;
try{
historyData = fs.readFileSync(settings.directory+settings.name+file);
}catch(e){
console.log(e);
}
historyData = JSON.parse(historyData);
temp = JSON.stringify(values);
temp = JSON.parse(temp);
delete temp["Last CT"];
delete temp["Best CT"];
delete temp["Average CT"];
delete temp["Parts Out"];
delete temp["CT Variance"];
delete temp["Target CT"];
delete temp["Target Parts"];
var tzoffset = (new Date()).getTimezoneOffset() * 60000; //offset in milliseconds
date = (new Date(Date.now() - tzoffset)).toISOString().slice(0,-1);
temp.date = FormatDate(date);
historyData.push(temp);
try{
fs.writeFileSync(settings.directory+settings.name+file, JSON.stringify(historyData), "utf8");
}catch(e){
console.log(e);
}
tzoffset = null;
historyData = null;
temp = null;
year = null;
month = null;
day = null;
file = null;
}
var v = JSON.stringify(values);
displayData = JSON.parse(v);
displayData["Last CT"] = displayData["Last CT"]/10;
displayData["Best CT"] = displayData["Best CT"]/10;
displayData["Average CT"] = displayData["Average CT"]/10;
var tzoffset = (new Date()).getTimezoneOffset() * 60000; //offset in milliseconds
date = (new Date(Date.now() - tzoffset)).toISOString().slice(0,-1);
displayData.date = FormatDate(date);
if(min != lastMin){
if(displayData["CT Variance"] >= 0){
positive.push(displayData["CT Variance"]);
xc.push(Date.now());
negative.push(0);
}else{
positive.push(0);
xc.push(Date.now());
negative.push(displayData["CT Variance"]);
}
if(xc.length > 181){
xc.splice(1,1);
positive.splice(1,1);
negative.splice(1,1);
}
app.set('xc', xc);
app.set('positive', positive);
app.set('negative', negative);
lastMin = min;
}
app.set('displayData', displayData);
tzoffset = null;
v = null;
date = null;
min = null;
sec = null;
console.log("Finished mcprotocol");
}
}
module.exports = app;