diff nodescore.old @ 49:ddb09f0a67fd

begining of attempt at modularisation

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/nodescore.old	Sat Oct 13 00:17:52 2012 +0000
@@ -0,0 +1,375 @@
+/*
+////////////////////////////////////////////
+
+nodescore server
+nodescore.kiben.net
[e-mail]
+
+////////////////////////////////////////////
+*/
+var sio = require('socket.io')
+, http = require('http')
+, ch = require('./chronometer')
+, fs = require('fs')
+, static = require('node-static');
+// run webserver serving static html
+////////////////////////////////////////////
+var clientFiles = new static.Server('./www');
+var httpServer = http.createServer(
+    function(request, response) {
+	request.addListener('end', function () {
+	    clientFiles.serve(request, response);	    
+	    process.setMaxListeners(0);
+	});    
+    });
+
+httpServer.listen(8889);
+
+
+var pinging=0
+console.log("ping set to 0")
+
+////////////////////////////////////////////
+// connect to websockets 
+////////////////////////////////////////////
+
+var io = sio.listen(httpServer)
+, nicknames = {};
+
+io.set('log level', 3); // reduce logging
+
+io.sockets.on('connection', function (socket) {
+
+    socket.on('nickname', function (nick, fn) {
+	if (nicknames[nick]) {
+	    fn(true);
+	} else {
+	    fn(false);
+	    nicknames[nick] = socket.nickname = nick;
+	    socket.broadcast.emit('announcement', nick + ' connected');
+	    io.sockets.emit('nicknames', nicknames);
+	}
+    });  
+
+    /// chat user messages to screens and to log file
+    // date format for filename
+
+    var da = new Date(); var dtstring = da.getFullYear()+ '-' + da.getMonth()+ '-' + da.getDate();
+
+    ////////////////////////
+    /// log messages to file
+    socket.on('user message', function (msg) {
+	fs.open('logs/chatlog-'+dtstring+'.txt', 'a', 666, function( e, id ) {	
+	    //time format for message stamp
+	    var dt = new Date();var timestring = dt.getHours() + ':' + dt.getMinutes() + ':' + dt.getSeconds();
+	    
+	    socket.broadcast.emit('user message', socket.nickname, msg);
+	    
+	    var fs = require('fs'), str = msg;
+	    fs.write( id, timestring+" " + socket.nickname + ": "+ msg+"\n", null, 'utf8', function(){});
+	});	
+    });
+    
+    ////////////////////////////////////////////
+    // metronome
+    ////////////////////////////////////////////
+    
+    socket.on('metroStop', stopMetro)
+    function stopMetro () {
+	metroState=0;
+    };
+
+    ////////////////////////////////////////////
+    // Chronometer
+    ////////////////////////////////////////////
+/*   
+    // number padding: 0 to 00
+
+    function pad(number) { return (number < 10 ? '0' : '') + number }
+    
+    // the chronometer initial states
+    var chronstate = 0; var zecsec = 0; var seconds = 0; 
+    var mins = 0; var hours = 0;
+   
+
+    dt = setInterval( function () {
+	socket.broadcast.emit("dateTime", ch.dateTime());
+	socket.emit("dateTime", ch.dateTime());
+	console.log("boooooooooooo")
+    },1000)
+
+
+    function chronometer() {
+	
+	if (chronstate==1){
+	    zecsec += 1;       // set tenths of a second
+	    if(zecsec > 9) { zecsec = 0; seconds += 1;}
+	    if(seconds > 59) { seconds = 0;mins += 1;}
+	    if(mins > 59) { mins = 0; hours += 1; }
+	    var chron = pad(hours) +":"+pad(mins)+ ':'+ pad(seconds)+ ":"+ zecsec
+	    setTimeout(function(){chronometer()}, 100);
+	    socket.broadcast.emit('chronFromServer', chron)
+	    socket.emit('chronFromServer', chron)
+	}
+    }
+
+*/
+
+    var chronstate=0;
+
+    function startChron (){
+    if (chronstate==1){
+	stopwatch =  setInterval(function () {
+	    c =  ch.chronometer(1)
+	    socket.broadcast.emit('chronFromServer', c)
+	    socket.emit('chronFromServer', c)
+	}, 100)};
+    }
+
+datetime =  setInterval(function () {
+	d =  ch.dateTime()
+	socket.broadcast.emit('dateTime', d)
+	socket.emit('dateTime', d)
+    }, 1000)
+
+
+
+
+    socket.on('startChr', function () { startChr();}); 
+    // if not already started start the chronometer    
+    function startChr() { if (chronstate !== 1) { 
+	chronstate = 1; 
+	startChron();
+
+} 
+			}
+
+    
+    socket.on('stopChr', function () { stopChr();} );    
+    function stopChr() {  chronstate = 0; }  
+    // stop the chronometer
+   
+    socket.on('resetChr', function () { resetChr();});
+    function resetChr() {//clearInterval();
+			   chronstate = 0;
+			   zecsec = 0; seconds = 0; 
+			    mins = 0; hours = 0; 
+			    chronstate = 0; 
+			   var chron = pad(hours) +":"+pad(mins)+ ':'+ pad(seconds)+ ":"+ zecsec
+			   // send 0.0.0 values to display
+			   socket.broadcast.emit('chronFromServer', chron)
+			   socket.emit('chronFromServer', chron)
+			}
+
+    ////////////////////////////////////////////
+    // magic square sequencer
+    ////////////////////////////////////////////
+//    var score = require('./score');
+//    var c = require('./chronometer');
+
+//    var mm = score.mm
+    var sequencerState = 0;
+  
+    
+  //  var srcsqr = score.srcsqr
+    var srcsqr = []
+    srcsqr[0] = [22,21,24,25,06,07];
+    srcsqr[1] = [20,23,27,26,05,04];
+    srcsqr[2] = [03,00,17,16,35,34];
+    srcsqr[3] = [01,02,19,18,33,32];
+
+//    var seqA = score.seqA
+//    var seqB = score.seqB
+//    var seqC = score.seqC
+//    var seqD = score.seqD
+
+    var seqA = { metrobeat:0, voice:1, name: "A", counter: 0, mm: 60, beatsinbar: 4, durations: srcsqr[0], units: [1,2,3,1,2,4]};
+    var seqB = { metrobeat:0, voice:2, name: "B", counter: 0, mm: 120, beatsinbar: 4, durations: srcsqr[1], units: [3,2,1,1,2,3]};
+    var seqC = { metrobeat:0, voice:3, name: "C", counter: 0, mm: 90, beatsinbar: 4, durations: srcsqr[2], units: [4,5,6,5,4,2]};
+    var seqD = { metrobeat:0, voice:4, name: "D", counter: 0, mm: 105, beatsinbar: 4, durations: srcsqr[3], units: [2,3,4,2,3,1]};
+  
+
+  
+     var countdowntick = function(seq){
+	// var tempoms = Math.floor(60000/seq.mm)
+	 var tempoms = Math.floor(60000/seq.mm)
+	 //console.log(tempoms)
+	 var timemultiplier=1
+	 var outcount = 4; var incount=4;
+	 var time = ((seq.durations[seq.counter]+1) *timemultiplier) + 30000 + (outcount*tempoms);
+	 var time = Math.floor(time)
+	 var ztime = time; 
+	 var totaltime = Math.floor(time/tempoms)
+	 var unit = seq.units[seq.counter];
+	 
+	 // initiate first page here
+	 socket.broadcast.emit("pageFlipfromserver", seq.voice, unit, time, seq.mm,seq.counter);
+	 socket.emit("pageFlipfromserver", seq.voice, unit, time, seq.mm,seq.counter);
+	 
+	 function sequenCer() {
+	 //    console.log(ztime)
+	     if (ztime >= 0 ){
+		 
+		// basic unit is still the second/1000ms - change this to tempoms? no i dont think so
+		// count in and count out
+		////////////////////////////////////////////
+		
+		 var counter = Math.floor(ztime/tempoms)
+		 //console.log(counter)
+		 if (counter >= 0 ){
+		     socket.broadcast.emit('counterText', seq.voice, seq.counter, counter);
+		     socket.emit('counterText', seq.voice, seq.counter, counter);
+		     
+		     if (counter <= outcount ) {              
+			 socket.broadcast.emit('countinFromServer', seq.voice, counter, "","stop in: ", "red", "transparent");
+		     }
+		     
+		     if (counter > (totaltime)-incount  && counter <= totaltime ) {
+			 socket.broadcast.emit('countinFromServer', seq.voice, counter-(totaltime-incount), "","play in: ", "green","transparent");
+			 socket.emit('countinFromServer', seq.voice, counter-(totaltime-incount), "","play in: ", "green","transparent");
+			 
+		     }
+		     
+		     if (counter == (totaltime)-incount ) {
+			 socket.broadcast.emit('countinFromServer', seq.voice, "+", "","playing.. ", "green","transparent");
+			socket.emit('countinFromServer', seq.voice, "+", "","playing.. ", "green","transparent");
+		     }
+		     
+		     // remove displayed number with " " at end of both countin/out
+		     
+		     if (counter == 0 ) {
+			 socket.broadcast.emit('countinFromServer', seq.voice, "", "","", "green","transparent");
+			 socket.broadcast.emit('counterText', seq.voice, seq.counter, "");
+			 socket.emit('counterText', seq.voice, seq.counter, "");
+		     }
+		 }		    
+				
+		 // on each beat do:
+		 
+		 // push out the pulse to metronome	
+		 seq.metrobeat = (seq.metrobeat+1)%seq.beatsinbar ;
+     		 socket.broadcast.emit('metroPulse', tempoms, seq.voice,seq.metrobeat); 
+		 socket.emit('metroPulse', tempoms, seq.voice,seq.metrobeat);
+	     }
+	     
+	     // flip the page 
+	     if (counter == 0){
+
+		 seq.counter = (seq.counter + 1) % seq.durations.length	    		
+		socket.broadcast.emit("pageFlipfromserver", seq.voice, unit, time, seq.mm,seq.counter);
+		 //delete tockTock;	
+		 step(seq);     
+	     }
+	     
+	     // decrement the time 
+	     ztime -= tempoms
+	 }
+	 
+	 var pulse = setInterval(sequenCer, tempoms);
+	 
+	 socket.on('stopSeq', function () {
+	     //donaldduck = mickeymouse + 7
+	     sequenCer.clearInterval
+	     console.log("sequencer stopping...")	    
+	     // grrr why wont this clearInterval work
+	     sequencerState = 0
+	     clearInterval(pulse)
+	     stopChr();
+	 });
+     };
+    
+    ////////////////
+    
+    socket.on('startSeq', function () { 
+	if (sequencerState == 0) { 
+	    console.log("sequencer starting...")	    
+	    startChr();
+
+//////////////////////////////////////////////////////////////////
+
+	    step(seqA);step(seqB); step(seqC); step(seqD);	    
+	    ztime =-1;
+    }
+
+	else console.log("sequencer already started...")
+    });
+    
+    step = function (seq) {
+	//clearInterval(seq.boo);
+	//clearInterval(countdowntick);
+	countdowntick(seq)
+	sequencerState=1;
+    };
+    
+    socket.on('resetSeq', function () { 
+	console.log("reset")
+	resetChr();		
+    });
+
+    
+    ////////////////////////////////////////////  
+    // some latency calculations
+    ///////////////////////////////////////////
+    
+    /*
+      a ping is periodically broadcast to all connected clients each
+      connected returns a pong to the server via an "emit" and in turn
+      the server returns each unique client a report of the latency
+      via another emit - the emit only sends to the source of the
+      request, whereas the broadcast.emit..  broadcasts.. ie to all
+      connected clients
+      
+      TODO: smooth range and average out results to remove erratic ping
+      times.
+
+      TODO:
+      The result then needs to be used to stagger outgoing messages to
+      compensate for latency - how much compensation is more connected
+      to the time that any audio/video feed needs to encode/decode as
+      the latency of the route from node A to node B is inavoidable?!
+      so maybe latency is irrelevant in this context - we just need to
+      stagger signals according to encoding decoding times.. hmmm
+    */
+
+
+// periodically broadcast a ping
+    function serverTime(freq) {
+	if (pinging==0){ st = setInterval(function() {
+	    var pinging=1;
+	    var d = new Date(); var n = d.getTime(); 
+	    socket.emit("timeFromServer", n); 
+	}, 1000);   } else console.log("already pinging")
+    }
+    // receive the pong calculate the latency and
+    // return the response to the client
+
+    socket.on("clientTimeResponse", function(x) {
+	var d = new Date(); var n = d.getTime();
+	var latency = (n-x)/2;
+	//console.log("SERVERTIME:"+x + " LATENCY:" + latency);
+	socket.emit("latencyFromServer", latency);
+    });	      
+    
+    // this is the trigger from the control client to start the process
+    // maybe remove this and have latency connections constantly running
+    
+    /*
+      socket.on("getLatencies", function(x){
+      serverTime(x);
+      });
+    */
+    
+    serverTime(1000);
+    
+    socket.on('disconnect', function(client) {	
+	console.log(socket.nickname + " is gone..." )
+	clearInterval(st);
+	
+	if (!socket.nickname) return;
+	
+	delete nicknames[socket.nickname];
+	socket.broadcast.emit('announcement', socket.nickname + ' disconnected');
+	socket.broadcast.emit('nicknames', nicknames);
+    });
+
+});