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nodeMessageBoard/server.js
2016-04-04 19:07:22 +02:00

178 lines
5.7 KiB
JavaScript

var fs = require('fs'),
http = require('http'),
socketio = require('socket.io'),
url = require("url"),
serialport = require("serialport");
low = require('lowdb'),
storage = require('lowdb/file-async'),
db = low('db.json', { storage });
var convert = require('emojize').emojize;
var SerialPort = serialport.SerialPort;
var config = low('config.json', { storage });
var socketServer;
var port = config('mainConfig').chain().find({ param: 'port' }).value()['value'];
var serialPort;
var portName = config('mainConfig').chain().find({ param: 'serialport' }).value()['value'];
var numberStringRecieved = "";
var numberRecieved = "";
var timeRecieved = "";
var color = 0;
// utility function for ucs2 decode
function ucs2Parse(ucs2){
codeArray = ucs2.match(/.{1,4}/g);
var returnString = "";
for(i=0;i<codeArray.length;i++){
returnString += String.fromCharCode(parseInt(codeArray[i], 16));
}
return returnString;
}
// utility function for escaping HTML tags
function escapeHtml(unsafe) {
return unsafe
.replace(/&/g, "&amp;")
.replace(/</g, "&lt;")
.replace(/>/g, "&gt;")
.replace(/"/g, "&quot;")
.replace(/'/g, "&#039;");
}
// handle contains locations to browse to (vote and poll); pathnames.
function startServer(route,handle,debug)
{
db('messages').size(); //call this once to establish the db if there is nothing in the json file
var mynumber = config('mainConfig').chain().find({ param: 'mynumber' }).value()['value'];
if(db('messages').size() == 0)db('messages').push({ numberString: "",number: mynumber, time: "now", message: "SMS MessageBoard",color: 0 });
// on request event
function onRequest(request, response) {
// parse the requested url into pathname. pathname will be compared
// in route.js to handle (var content), if it matches the a page will
// come up. Otherwise a 404 will be given.
var pathname = url.parse(request.url).pathname;
console.log("Request for " + pathname + " received");
var content = route(handle,pathname,response,request,debug);
}
var httpServer = http.createServer(onRequest).listen(port, function(){
console.log("Listening at: http://localhost:"+port);
console.log("Server is up");
});
serialListener(debug);
initSocketIO(httpServer,debug);
}
function initSocketIO(httpServer,debug)
{
socketServer = socketio.listen(httpServer);
if(debug == false){
socketServer.set('log level', 1); // socket IO debug off
}
socketServer.on('connection', function (socket) {
console.log("user connected");
socket.emit('onconnection');
socket.on('clear', function(number) {
var index = db.object.messages.length - number;
db.object.messages.splice(index,1);
db.write();
console.log('removed entry ' + number)
});
socket.on('getConfig', function(data) {
var number = config('mainConfig').chain().find({ param: 'mynumber' }).value()['value'];
socket.emit('config',number);
});
socket.on('sendAT', function(data) {
serialPort.write('AT\r');
console.log('sending AT...');
});
socket.on('refreshClients', function() {
console.log('Refreshing all clients');
socketServer.emit('clientrefresh'); // send this to all so use socketServer
});
socket.on('getLastMessages', function(number) {
console.log('retrieving messages');
var times = db('messages').chain().takeRight(number).map('time').value();
var numbers = db('messages').chain().takeRight(number).map('number').value();
var messages = db('messages').chain().takeRight(number).map('message').value();
var colors = db('messages').chain().takeRight(number).map('color').value();
for(var i = 0; i < messages.length; i++){
socket.emit('newMessage',times[i],numbers[i],convert(messages[i]),colors[i]);
}
});
});
}
// Listen to serial port
function serialListener(debug)
{
var receivedData = "";
serialPort = new SerialPort(portName, {
baudrate: 19200,
parser: serialport.parsers.readline("\n")
});
serialPort.on("open", function () {
console.log('opened serial communication');
serialPort.on('data', function(data) {
console.log('Incomming serial data...\r');
console.log(data);
console.log("\r"); //+data.length
// send the incoming data to clients using the socket.
if(data.startsWith("+CMT:")){ // if message ok
numberStringRecieved = data;
numberRecieved = data.substring(data.indexOf('+CMT: "') + 7, data.indexOf('",'));
numberRecieved = ucs2Parse(numberRecieved);
timeRecieved = data.substring(data.indexOf('","","') + 15, data.indexOf('+0')); // the end of this string has to do with time zone and daylightsaving time mode
} else if (data.length > 1) {
if(numberRecieved){
//console.log("emit");
var color = db('messages').chain().takeRight(1).map('color').value();
console.log(JSON.stringify(color));
if (color == null)color = 0;//no messages yet
color++;
if(color > 4) color = 0;
var messageRecieved = escapeHtml(ucs2Parse(data));
db('messages').push({ numberString: numberStringRecieved,number: numberRecieved, time: timeRecieved, message: messageRecieved,color: color });
//add a new message to the board directly
socketServer.emit('newMessage', timeRecieved, numberRecieved, convert(messageRecieved),color);
numberStringRecieved = null;
numberRecieved = null;
timeRecieved = null;
}
else {
//console.log("nothing");
}
} else {
//debugMessages trigger an alert on the clients
//socketServer.emit('debugMessage', data);
}
});
var pincode = config('mainConfig').chain().find({ param: 'pincode' }).value()['value'];
serialPort.write('AT+CPIN='+pincode+'\r');
console.log("Sent Pincode...");
});
}
exports.start = startServer;