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module.exports = function(express,app,fs,os,io,PythonShell,scriptPath){
console.log("Server started!!! ");
var router = express.Router();
var pyEnv = '/usr/bin/python'
router.get('/',function(req,res,next){
res.render('index',{host:app.get('host'),title:'Ngspice Simulator'});
});
io.on('connection', function (socket) {
socketID = getSocketID(socket);
var plot_allv_file = '/tmp/plot_allv_'+socketID.toLowerCase()+'.txt'
var fileName = '/tmp/'+socketID+'.cir.out';
socket.emit('loadingPage', 'User with socket ID '+socket.id+' is Connected');
socket.on('user', function (data) {
console.log('Socket ID : '+data['socketID']);
});
socket.on('netlist',function(data){
netlistContent = data['netlist'];
//Plotting List
plotList = data['plotList'];
console.log("PlotList----------->"+plotList);
plotOption = plotList.join(" "); //Space is required between two plot
if (!plotOption.length>0){
plotOption='allv'
}
// socket.emit('serverMessage','Recived message for client '+socketID);
fs.writeFile(fileName, netlistContent, function (err) {
if (err){
return console.log(err);
}
console.log('File is stored at '+fileName);
fs.exists(fileName, function(exists) {
if (exists) {
addPlotDetails(fileName,plotOption);
executeNgspiceNetlist(fileName);
}
});
});
});
socket.on('disconnect',function(){
console.log("Client "+socketID+" disconnected");
fs.exists(fileName, function(exists) {
if (exists) {
//Deleting ngspice file
deleteNetlistFile(fileName);
}
});
fs.exists(plot_allv_file, function(exists) {
// console.log("Check Plot allv "+plot_allv_file)
if (exists) {
console.log("Check Plot allv files")
//Deleting plot allv file
deleteNetlistFile(plot_allv_file);
}
});
});
function addPlotDetails(fileName,plotOption)
{
//Adding Plot component in a file
sed('-i', 'run', 'run \n print '+plotOption+' > /tmp/plot_allv_'+socketID+'.txt \n' , fileName);
}
function executeNgspiceNetlist(fileName)
{
fs.exists(fileName, function(exists) {
if (exists) {
exec('ngspice '+fileName, function(code, stdout, stderr) {
console.log('Exit code:', code);
console.log('Program output:', stdout);
console.log('Program stderr:', stderr);
if(stderr){
switch(stderr){
case (stderr.match(/Error/) || stderr.match(/error/)||{}).input:
console.log("Error in executing ngspice netlist");
socket.emit('clearPlot','clearPlot');
socket.emit('serverMessage',{"stderr":stderr,"stdout":stdout});
break;
default:
parsePlotData()
break;
}
}
else{
parsePlotData()
}
});
}
});
}
function parsePlotData(){
console.log("Ngspice netlist executed successfully "+fileName);
//socket.emit('serverMessage','Ngspice netlist executed successfully: ');
//var analysisInfo = grep('.tran|.dc|.ac', fileName); //Not reliable
var analysisInfo = getAnalysisInfo(fileName);
console.log("Analysis :"+analysisInfo)
var options = {
mode: 'json',
pythonPath: pyEnv,
pythonOptions: ['-u'],
scriptPath: scriptPath,
args: [analysisInfo, plot_allv_file]
};
PythonShell.run('parser.py', options, function (err, results) {
if (err) throw err;
// results is an array consisting of messages collected during execution
// console.log('results: %j', results);
var resultString = results[0];
//Emitting Data Points to client
socket.emit('plotData',resultString);
});
}
function getSocketID(socket){
socketID = socket.id;
//Removing first two char i.e '/#' from socket id
socketID = socketID.substring(2);
console.log("Return :"+socketID)
return socketID;
}
function deleteNetlistFile(fileName){
console.log("Delete File "+fileName)
fs.unlink(fileName, function(err){
if (err) return console.log("Error while deleting ngspice file :"+err);
console.log("success");
});
}
function getAnalysisInfo(fileName){
var analysisType;
fs.readFileSync(fileName).toString().split('\n').forEach(function (line) {
line = line.trim();
if(line.startsWith(".ac")||line.startsWith(".tran")||line.startsWith(".dc")){
analysisType = line;
}
});
return analysisType;
}
});
app.use('/',router);
}
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