handleSessionTime

src/JavaScript/SCORM_API_wrapper.js

@@ -33,11 +33,13 @@ pipwerks.SCORM = {                                  //Define the SCORM object
     version:    null,                               //Store SCORM version.
     handleCompletionStatus: true,                   //Whether or not the wrapper should automatically handle the initial completion status
     handleExitMode: true,                           //Whether or not the wrapper should automatically handle the exit mode
+    handleSessionTime: true,                        //Whether or not the wrapper should automatically handle the session time	
     API:        { handle: null,
                   isFound: false },                 //Create API child object
     connection: { isActive: false },                //Create connection child object
     data:       { completionStatus: null,
-                  exitStatus: null },               //Create data child object
+                  exitStatus: null,
+                  dtmInitialized: null},             //Create data child object
     debug:      {}                                  //Create debug child object
 };
 
@@ -251,6 +253,9 @@ pipwerks.SCORM.connection.initialize = function(){
 
     trace("connection.initialize called.");
 
+    //set init date-time
+    scorm.data.dtmInitialized = new Date();
+
     if(!scorm.connection.isActive){
 
         var API = scorm.API.getHandle(),
@@ -356,6 +361,7 @@ pipwerks.SCORM.connection.terminate = function(){
         scorm = pipwerks.SCORM,
         exitStatus = scorm.data.exitStatus,
         completionStatus = scorm.data.completionStatus,
+        dtmInitialized = scorm.data.dtmInitialized,
         trace = pipwerks.UTILS.trace,
         makeBoolean = pipwerks.UTILS.StringToBoolean,
         debug = scorm.debug,
@@ -369,7 +375,28 @@ pipwerks.SCORM.connection.terminate = function(){
 
         if(API){
 
-             if(scorm.handleExitMode && !exitStatus){
+            if(scorm.handleSessionTime){
+
+                var dtm = new Date(); 
+
+                //in the next line you substract the time recorded when initialising 
+                //the connection from the present time. 
+                var n = dtm.getTime() - dtmInitialized.getTime(); 
+                switch(scorm.version){ 
+
+                    //the time format is different on scorm 1.2 or 2004, so we use 
+                    //different conversions depending on the case 
+                    case "1.2" :
+                        this.set("cmi.core.session_time",pipwerks.UTILS.MillisecondsToCMIDuration(n)); 
+                    break;
+                    case "2004":
+                        this.set("cmi.session_time",pipwerks.UTILS.centisecsToISODuration(Math.floor(n/10)));
+                    break; 
+                }
+
+            }
+
+            if(scorm.handleExitMode && !exitStatus){
 
                 if(completionStatus !== "completed" && completionStatus !== "passed"){
 
@@ -841,3 +868,80 @@ pipwerks.UTILS.trace = function(msg){
 
      }
 };
+
+
+/* -------------------------------------------------------------------------
+   pipwerks.UTILS.MillisecondsToCMIDuration()
+   Converts time to scorm 1.2 time format 
+
+   Parameters: n (number)
+   Return:     String
+---------------------------------------------------------------------------- */
+
+pipwerks.UTILS.MillisecondsToCMIDuration = function(n){
+
+    //Convert duration from milliseconds to 0000:00:00.00 format 
+    n = (!n || n<0)? 0 : n; //default value and force positive duration
+    var hms = ""; 
+    var dtm = new Date();        dtm.setTime(n); 
+    var h = "0" + Math.floor(n / 3600000); 
+    var m = "0" + dtm.getMinutes(); 
+    var s = "0" + dtm.getSeconds(); 
+    hms = h.substr(h.length-2)+":"+m.substr(m.length-2)+":"; 
+    hms += s.substr(s.length-2); 
+    return hms 
+
+};
+
+
+/* -------------------------------------------------------------------------
+   pipwerks.UTILS.centisecsToISODuration()
+   Converts time to scorm 2004 time format
+
+   Parameters: n (number)
+   Return:     String
+---------------------------------------------------------------------------- */
+
+pipwerks.UTILS.centisecsToISODuration = function(n){ 
+
+    // Note: SCORM and IEEE 1484.11.1 require centisec precision 
+    // Months calculated by approximation based on average number 
+    // of days over 4 years (365*4+1), not counting the extra day 
+    // every 1000 years. If a reference date was available, 
+    // the calculation could be more precise, but becomes complex, 
+    // since the exact result depends on where the reference date 
+    // falls within the period (e.g. beginning, end or ???) 
+    // 1 year ~ (365*4+1)/4*60*60*24*100 = 3155760000 centiseconds 
+    // 1 month ~ (365*4+1)/48*60*60*24*100 = 262980000 centiseconds 
+    // 1 day = 8640000 centiseconds 
+    // 1 hour = 360000 centiseconds 
+    // 1 minute = 6000 centiseconds 
+    n = Math.max(n,0); // there is no such thing as a negative duration 
+    var str = "P"; 
+    var nCs = n; 
+    // Next set of operations uses whole seconds 
+    var nY = Math.floor(nCs / 3155760000); 
+    nCs -= nY * 3155760000; 
+    var nM = Math.floor(nCs / 262980000); 
+    nCs -= nM * 262980000; 
+    var nD = Math.floor(nCs / 8640000); 
+    nCs -= nD * 8640000; 
+    var nH = Math.floor(nCs / 360000); 
+    nCs -= nH * 360000; 
+    var nMin = Math.floor(nCs /6000); 
+    nCs -= nMin * 6000 
+    // Now we can construct string 
+    if (nY > 0) str += nY + "Y"; 
+    if (nM > 0) str += nM + "M"; 
+    if (nD > 0) str += nD + "D"; 
+    if ((nH > 0) || (nMin > 0) || (nCs > 0)) { 
+        str += "T"; 
+        if (nH > 0) str += nH + "H"; 
+        if (nMin > 0) str += nMin + "M"; 
+                if (nCs > 0) str += (nCs / 100) + "S"; 
+    } 
+    if (str == "P") str = "PT0H0M0S"; 
+      // technically PT0S should do but SCORM test suite assumes longer form. 
+    return str;
+
+};

test/JavaScript/index.html

@@ -0,0 +1,16 @@
+<!DOCTYPE html>
+<html>
+    <head>
+        <meta charset="utf-8">
+        <meta name="viewport" content="width=device-width">
+        <title>SCORM_API_wrapper.js - tests</title>
+        <link rel="stylesheet" href="https://code.jquery.com/qunit/qunit-2.4.1.css">
+    </head>
+    <body>
+        <div id="qunit"></div>
+        <div id="qunit-fixture"></div>
+        <script src="../../src/JavaScript/SCORM_API_wrapper.js"></script>
+        <script src="https://code.jquery.com/qunit/qunit-2.4.1.js"></script>
+        <script src="test.js"></script>
+    </body>
+</html>

test/JavaScript/test.js

@@ -0,0 +1,31 @@
+QUnit.test("centisecsToISODuration", function (assert){
+
+    var t1 = 1513937992632;
+    var t2 = 1513938095752;
+    var d = t2 - t1;
+
+    assert.equal(pipwerks.UTILS.centisecsToISODuration(d), 'PT17M11.2S');
+    assert.equal(pipwerks.UTILS.centisecsToISODuration(), 'PT0H0M0S');
+    assert.equal(pipwerks.UTILS.centisecsToISODuration(undefined), 'PT0H0M0S');
+    assert.equal(pipwerks.UTILS.centisecsToISODuration(null), 'PT0H0M0S');
+    assert.equal(pipwerks.UTILS.centisecsToISODuration(''), 'PT0H0M0S');
+    assert.equal(pipwerks.UTILS.centisecsToISODuration(0), 'PT0H0M0S');
+    assert.equal(pipwerks.UTILS.centisecsToISODuration(-1), 'PT0H0M0S');
+
+});
+
+QUnit.test("MillisecondsToCMIDuration", function (assert) {
+
+    var t1 = 1513937992632;
+    var t2 = 1513938095752;
+    var d = t2 - t1;
+
+    assert.equal(pipwerks.UTILS.MillisecondsToCMIDuration(d), '00:01:43');
+    assert.equal(pipwerks.UTILS.MillisecondsToCMIDuration(), '00:00:00');
+    assert.equal(pipwerks.UTILS.MillisecondsToCMIDuration(undefined), '00:00:00');
+    assert.equal(pipwerks.UTILS.MillisecondsToCMIDuration(null), '00:00:00');
+    assert.equal(pipwerks.UTILS.MillisecondsToCMIDuration(''), '00:00:00');
+    assert.equal(pipwerks.UTILS.MillisecondsToCMIDuration(0), '00:00:00');
+    assert.equal(pipwerks.UTILS.MillisecondsToCMIDuration(-1), '00:00:00');
+
+});