forked from lbsadmin/nodeMessageBoard
131 lines
3.9 KiB
JavaScript
131 lines
3.9 KiB
JavaScript
var fs = require('fs'),
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http = require('http'),
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socketio = require('socket.io'),
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url = require("url"),
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serialport = require("serialport");
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low = require('lowdb'),
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storage = require('lowdb/file-async'),
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db = low('db.json', { storage });
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const port = 3000;
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var SerialPort = serialport.SerialPort;
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var socketServer;
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var serialPort;
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var portName = '/dev/tty.usbmodemFD121'; //change this to your Arduino port
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var numberStringRecieved = "";
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var numberRecieved = "";
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var timeRecieved = "";
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// utility function for ucs2 decode
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function ucs2Parse(ucs2){
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codeArray = ucs2.match(/.{1,4}/g);
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var returnString = "";
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for(i=0;i<codeArray.length;i++){
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returnString += String.fromCharCode(parseInt(codeArray[i], 16));
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}
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return returnString;
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}
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// handle contains locations to browse to (vote and poll); pathnames.
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function startServer(route,handle,debug)
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{
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// on request event
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function onRequest(request, response) {
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// parse the requested url into pathname. pathname will be compared
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// in route.js to handle (var content), if it matches the a page will
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// come up. Otherwise a 404 will be given.
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var pathname = url.parse(request.url).pathname;
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console.log("Request for " + pathname + " received");
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var content = route(handle,pathname,response,request,debug);
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}
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var httpServer = http.createServer(onRequest).listen(port, function(){
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console.log("Listening at: http://localhost:"+port);
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console.log("Server is up");
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});
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serialListener(debug);
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initSocketIO(httpServer,debug);
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}
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function initSocketIO(httpServer,debug)
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{
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socketServer = socketio.listen(httpServer);
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if(debug == false){
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socketServer.set('log level', 1); // socket IO debug off
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}
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socketServer.on('connection', function (socket) {
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console.log("user connected");
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socket.emit('onconnection');
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socket.on('sendAT', function(data) {
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serialPort.write('AT\r');
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console.log('sending AT...');
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});
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socket.on('getLastMessages', function(number) {
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console.log('retrieving messages');
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var times = db('messages').chain().takeRight(number).map('time').value();
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var numbers = db('messages').chain().takeRight(number).map('number').value();
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var messages = db('messages').chain().takeRight(number).map('message').value();
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for(var i = 0; i < messages.length; i++){
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socket.emit('newMessage',times[i],numbers[i],messages[i]);
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}
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});
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});
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}
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// Listen to serial port
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function serialListener(debug)
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{
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var receivedData = "";
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serialPort = new SerialPort(portName, {
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baudrate: 19200,
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parser: serialport.parsers.readline("\n")
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});
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serialPort.on("open", function () {
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console.log('opened serial communication');
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serialPort.on('data', function(data) {
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console.log('Incomming serial data...\r');
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console.log(data);
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console.log("\r"); //+data.length
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// send the incoming data to clients using the socket.
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if(data.startsWith("+CMT:")){ // if message ok
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numberStringRecieved = data;
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numberRecieved = data.substring(data.indexOf('+CMT: "') + 7, data.indexOf('",'));
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numberRecieved = ucs2Parse(numberRecieved);
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timeRecieved = data.substring(data.indexOf('","","') + 15, data.indexOf('+04'));
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} else if (data.length > 1) {
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if(numberRecieved){
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//console.log("emit");
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var messageRecieved = ucs2Parse(data);
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db('messages').push({ numberString: numberStringRecieved,number: numberRecieved, time: timeRecieved, message: messageRecieved });
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//add a new message to the board directly
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socketServer.emit('newMessage', timeRecieved, numberRecieved, messageRecieved);
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numberStringRecieved = null;
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numberRecieved = null;
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timeRecieved = null;
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}
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else {
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//console.log("nothing");
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}
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} else {
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//debugMessages trigger an alert on the clients
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//socketServer.emit('debugMessage', data);
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}
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});
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serialPort.write('AT+CPIN=3797\r');
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console.log("Sent Pincode...");
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});
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}
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exports.start = startServer;
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