ICGLabelServer/hidLabel.js

var http = require('http');  
var exec = require('child_process').exec;
var fs = require('fs');
var WebSocketServer = require('websocket').server;
var HID = require('node-hid');
var devices = HID.devices();
var myBarCode= {};
var lastBarCode = "";
var lastLabel="";
var request = require('request');

try{
    var tempObj  = fs.readFileSync('whoami');
    tempRead = JSON.parse(tempObj);
    whoami = tempRead.Name;
    console.log("I am '" + whoami + "'");
} catch (e) {
	console.log("I could not open whoami, I'm going to quit");
    process.exit();
}

for(var i in devices){
    console.log(devices[i]);
    if(devices[i].product){
        var myString = devices[i].product;
        if(myString.indexOf('Bar Code')>-1){
            console.log("found barcode reader: " + myString);
            myBarCode=devices[i]
        };
    }
}

if(myBarCode.path){
    var device = new HID.HID(myBarCode.path);
} else {
    console.log("I couldn't get barcode readers path, I'm going to exit.");
    process.exit();
}

device.on("data", function(data) {
    var myRead = data.toString();
    var myArray =  myRead.split("");
    var startLog=false;
    var myRes="";
    for (var i = 0, len = myArray.length; i < len; i++) {
        if(startLog){
            if(myArray[i]=='\u0000'){  
                break;
            }
            myRes=myRes + myArray[i];
        }
        if(myArray[i]=='\u0000'){startLog=true;}
    }
    console.log ("I think you want '" + myRes + "'");
	if (myRes == "REBOOT"){exec('shutdown -r now '); return;}
	if (myRes == "CLOSE"){exec('pkill -f firefox '); return;}
	
	if (myRes.substring(0,3) == "MOD"){
		console.log("Sending Modal Selection to browsers =  " + myRes);
		for(var i in clients){
			var sendMe = JSON.stringify({'type':'Modal', 'MOD':myRes});
			clients[i].sendUTF(sendMe);
		}
		return;
	}
        if (myRes.substring(0,9) == "WEBREBOOT"){
            request.get('https://icg.islandceramics.com:8081/?command=webReboot', function (error, response, body) {
               if (!error && response.statusCode == 200) {
                console.log(body);
               } else {
                console.log(error);
               }
             });
            return;
        }

	if (myRes.substring(0,4) == "MANT"){
		console.log("Sending MAINT signoff to browsers =  " + myRes);
		for(var i in clients){
			var sendMe = JSON.stringify({'type':'MANT', 'MANT':myRes});
			clients[i].sendUTF(sendMe);
		}
		return;
	}	
	if (myRes.substring(0,4) == "ROLL"){
		console.log("Sending Modal Selection to browsers =  " + myRes);
		for(var i in clients){
			var sendMe = JSON.stringify({'type':'ROLL', 'ROLL':myRes});
			clients[i].sendUTF(sendMe);
		}
		return;
	}

	if (myRes.substring(0,6) == "CONFIG"){
		console.log("Configuration Request");
		exec("/sbin/ifconfig", function(error,stdout,stderr){
			var myMessage = error + stdout + stderr; 
			console.log (myMessage);
			for(var i in clients){
				var sendMe = JSON.stringify({'type':'Message', 'Message':myMessage});
				clients[i].sendUTF(sendMe);
			}
		})
		return;
	}

	if (myRes.substring(0,3) == "F11"){
		console.log("full screen me browsers =  " + myRes);
		exec('/usr/bin/xdotool search --name Mozilla key F11', {env: {'DISPLAY': ':0.0', 'XAUTHORITY':'/home/bhitch/.Xauthority'}}, function(error,stdout,stderr){
			console.log(error + "~" + stdout + "~" + stderr);
		});		
		return;
	}
	if (myRes.substring(0,3) == "REL"){
		console.log("Shift CTL Reload =  " + myRes);
		exec('/usr/bin/xdotool search --name Mozilla key shift+ctrl+r', {env: {'DISPLAY': ':0.0', 'XAUTHORITY':'/home/bhitch/.Xauthority'}}, function(error,stdout,stderr){
			console.log(error + "~" + stdout + "~" + stderr);
		});		
		return;
	}
	if (myRes.substring(0,3) == "UPG"){
		console.log("Copy hidLabel.js from server:  " + myRes);
		exec('/home/pi/updateAndReboot.sh');		
		return;
	}
	if (myRes.substring(0,3) == "DOC"){
           console.log("Sending DocRevCheck to browsers =  " + myRes);
    		     for(var i in clients){
			var sendMe = JSON.stringify({'type':'DocRevCheck', 'Doc':myRes});
        		clients[i].sendUTF(sendMe);
                     }
		return;
	}
	if (myRes.substring(0,3) == "LAB"){
		console.log("Sending Label Request to browsers =  " + myRes.substring(3));
		for(var i in clients){
			var sendMe = JSON.stringify({'type':'LabelRequest', 'labelNum':myRes.substring(3)});
			console.log(sendMe);
			clients[i].sendUTF(sendMe);
		}
		return;
	}
	if (myRes.substring(0,3) == "PIC"){
		console.log("Sending Picture Request to browsers =  " + myRes.substring(3));
		for(var i in clients){
			var sendMe = JSON.stringify({'type':'PICrequest', 'ID':myRes.substring(3)});
			console.log(sendMe);
			clients[i].sendUTF(sendMe);
		}
		return;
	}
	if (myRes.substring(0,6) == "MCLOSE"){
		//console.log("Sending ModalCloseRequest");
		for(var i in clients){
			var sendMe = JSON.stringify({'type':'ModalClose'});
			console.log(sendMe);
			clients[i].sendUTF(sendMe);
		}
		return;
	}
	// if we get this far it turns on whether numeric.  Numeric = job, non-numeric = scanDictionary lookup
	if(isNumeric(myRes)){
		if(myRes==lastBarCode){
			// Print a label
			console.log("print a label");
			labelPrint(myRes);
			return;
		}
		lastBarCode=myRes;
		console.log("sending barcode to browser");
		for(var i in clients){
		var sendMe = JSON.stringify({'type':'barcode', 'barcode':myRes});
		    clients[i].sendUTF(sendMe);
		}
		return;
	}
	console.log("Only thing left is scan dictionary");
		for(var i in clients){
		var sendMe = JSON.stringify({'type':'scanDictionary', 'lookMeUp':myRes});
		    clients[i].sendUTF(sendMe);
		}
		return;

});

device.on("error", function(err) {
    console.log(err);
});

var server = http.createServer(function(request, response){
    response.writeHead(200, {'Content-Type': 'text/plain'});
    response.end("Hello There");
})

server.listen(8080, '127.0.0.1', function(){ console.log("Node Web Server is listening\n\n");});

var clients={};
var count=0;
wss = new WebSocketServer({httpServer: server});
wss.on('request', function(r){
    var connection=r.accept('barcode', r.origin);
    var id = count++;
    clients[id]= connection;
    connection.on('close', function(reasonCode, description){
        console.log("Connection Closed");
        delete clients[id];
    })
    connection.on('message', function(message){
		var myLabel2 = JSON.parse(message.utf8Data);
		if(myLabel2.type=="labelPrint"){
			fs.writeFileSync('labelOut2.zpl', myLabel2.zCode);
			console.log(myLabel2);
			printLabel('labelOut2.zpl');		
		}
    })
});

function labelPrint(lotid){
	if(lotid == lastLabel) {
		//just print, dont request new label string
		printLabel('shipLabel.zpl');
		return;
	}
	
	request.get("http://192.168.10.26/ShopLabel.php?MLOT="+lotid+"&who="+whoami+"&ship=1", function (error, response, body) {
            if (!error && response.statusCode == 200) {
		    console.log("Here comes the web response:");
                console.log(body);
            } else {
		    console.log("Here comes the error:");
                console.log(error);
            }
         });
}
function printLabel(filename){	
	console.log("trying to print label");
	exec('cat ' + filename + ' > /dev/usb/lp0', function(error, stdout, stderr) {
	});

}
function isNumeric(n) {
  return !isNaN(parseFloat(n)) && isFinite(n);
}