sadira/www/js/sadira.js

Web framework

// Sadira astro-web framework - PG Sprimont <fullmoon@swing.be> (2013) - INAF/IASF Bologna, Italy.
// Do what you want with this file.


var server_prefix="";
var sadira_prefix="";
var widget_prefix="";

var cnx_status=null;

function set_connexion_status(state, msg){
  if(!cnx_status)
      cnx_status = document.getElementById("connexion_status");
    
    if(!cnx_status){
	console.log("No cnx_status dom node provided ! state = "+ state+"["+msg+"]");
	return;
    }
    
    if(cnx_status){
	cnx_status.className = "connexion "+state;
	cnx_status.innerHTML=msg;
    }else
	console.log("DOM cnx status not found!");
    return cnx_status;
}


var sadira = function(parameters, on_error, on_connect) {

    var sad=this;
    

    //this.root_widget=new widget.base(); //The dummy widget created at startup time.
    this.page_widget=null; //The main widget.

    //Making link to the WebSocket server and handling of the socket events
    
    this.initiate_connexion = function(on_error, on_connect){
	
	//Checking web storage support 
	
	if(typeof(Storage)=="undefined"){ 
	    var emsg="Sorry, you need a browser with webstorage support. ";
	    set_connexion_status("error", emsg);
            return on_error(emsg);
	}
	

	if(typeof parameters.server=='undefined'){
	    if(document.location.protocol == "http:")
		ws_host="ws://"+location.host;
	    else //is 'https'
		ws_host="wss://"+location.host;
	}else
	    ws_host=parameters.server;
	
	
    	if(typeof parameters.server_prefix!='undefined')
	    server_prefix=parameters.server_prefix;
	else
	    server_prefix="";


    	if(typeof parameters.sadira_prefix!='undefined')
	    sadira_prefix=parameters.sadira_prefix;
	else
	    sadira_prefix="sadira";
	
    	if(typeof parameters.widget_prefix!='undefined')
	    widget_prefix=parameters.widget_prefix;
	else
	    widget_prefix=sadira_prefix+"/widgets";
    
	//console.log("ws host is " +ws_host + ' protocol is ' +  document.location.protocol );    
	//set_connexion_status("unknown","Connecting to <pre>" + JSON.stringify(location,null,3) + "</pre>" );
	
	//set_connexion_status("unknown","Connecting to " + ws_host + " ..." );

	var wsock=null; //The (main) web(rtc)socket.

	if(!parameters.mode) 
	    parameters.mode="websocket"; 
	
	if(parameters.mode=="webrtc"){
	    
	    var datachannel_opts = {
		ordered: false, // do not guarantee order
		maxRetransmitTime: 3000, // in milliseconds
	    };

	    wsock=newRTCPeerConnexion('http://localhost');

	    /*
	    socket.on('news', function (data) {
		console.log(data);
		socket.emit('my other event', { my: 'data' });
	    });
	    */

	}else{
	    
	    window.WebSocket = window.WebSocket || window.MozWebSocket;
	    
	    //Checking web socket support 
	    
	    if (!window.WebSocket) {
		var emsg="Sorry, but your browser doesn't support WebSockets.<br>Please install a modern web browser";
		//set_connexion_status("error", emsg);
		return on_error(emsg);
	    }

	    wsock = new WebSocket(ws_host);
	    wsock.binaryType = "arraybuffer";
	}
	
	
	wsock.onclose = function () {
	    //this.set_status();
	    if(sad.dialogs!='undefined') delete sad.dialogs;
	};
	
	wsock.onopen = function () {
	    //this.set_status();
	    sad.dialogs= new dialog_manager(wsock);

	    //root_widget = new widget.base();
	    //Looking in web storage if we already have an assigned session id
	    
	    var session_id=localStorage.session_id;
	    var d={};

	    if(typeof session_id != 'undefined') d.session_id=session_id;
	    
	    
	    // root_widget.send_global_message("sadira.session.connect",d, function(msg){
		
	    // 	if(msg.widget_msg=="new_session"){
		    
	    // 	}
		
		
	    // });
	    
	    on_connect();
	    //        input.removeAttr('disabled');
	    //        status.text('Choose name:');
	};
	
	wsock.onerror = function (error) {
	    //this.set_status(error);
	    on_error(error);
	    //set_connexion_status("error", "Error: <pre>"+JSON.stringify(error,null,3)+"</pre>");
	};
	
	wsock.onmessage = function (msg) {
	    
	    //console.log('received message type = ' + msg.srcElement.binaryType);
	    
	    try{		
		var dgram=new datagram();
		
		if(msg.data instanceof ArrayBuffer){ //Binary
		    dgram.deserialize(msg.data);
		}
		else //{
		    dgram.set_header(JSON.parse(msg.utf8Data));
		//console.log('received bin message size=' + message.binaryData.length + ' bytes.');
		// }else{
		//     throw "Unhandled socket message type " + msg.srcElement.binaryType;
		// }
		
		sad.dialogs.process_datagram(dgram);
	    }
	    catch(e){
		console.log("Error processing datagram : " + dump_error(e));
	    } 
	    
	};
	
    }
    
    if( typeof on_connect != 'undefined') 
	this.initiate_connexion(on_error, on_connect);
    
};

function load_main_widget_site(){
    
    //console.log("Sadira starting from index.html");
    
    //Eastablishing link with the sadira websocket server
    
    window.sadira=new sadira({}, function(error){}, function(connected){
	
	//Getting instructions about what widget to load
	
	var d= sadira.dialogs.create_dialog({ handler : "sadira.session.get_gui"});
	
	var buf = new ArrayBuffer(1000*4);
	var floatview = new Float32Array(buf);
	var s=0;
	for(var j=0;j<1000;j++){
	    var n=Math.random();
	    floatview[j]=n;
	    s+=n;
	}

	console.log("TESTSUM="+s);
	d.listen('page_widget', function(dgram){
	    						
	    page_widget = eval("new "+dgram.header.widget_name);
	    sadira.root_widget.add_child(page_widget);
	    page_widget.set_title();
	    page_widget.set_html(function(){
		page_widget.init(function(err, w){
		    
		    //console.log("received " + msg.data.widget_name + " test = " + page_widget.test);
		    
		    document.getElementsByTagName('body')[0].appendChild(page_widget.widget_div);
		});
	    });

	});


	d.srz_request=function(dgram, result_cb){
	    
	    var sz=dgram.header.sz;
	    var b=new ArrayBuffer(sz);
	    var sr=new srz_mem(b);
	    
	    sr.on_done=function(){
		console.log("OK, received nbytes=" +sr.size());
		var fv = new Float32Array(sr.data);
		
		var s=0;
		for(var i=0;i<1000;i++)
		    s+=fv[i];
		console.log("TESTSUM RESENT="+s);
	    }
	    
	    result_cb(null, sr);
	};


	
	d.connect(function(error, init_dgram){
	    console.log("Init data error= " + error + " init data = " + JSON.stringify(init_dgram));

	    if(error); else{
		var sr=new srz_mem(buf);
		
		sr.on_error=function(error){
		    console.log("SR error  " + error);
		}
		sr.on_done=function(){
		    console.log("Write finished!");
		};
		sr.on_accept=function(){
		    console.log("SRZ accepted !");
		};

		d.srz_initiate(sr, function(error){
		    
		});
	    }


	}); 
	
    });
    
}