api_wrapper.js

完美的在线教育系统

	if (strWholeSec.length < 2)
	{
		strWholeSec = "0" + strWholeSec;
	}
	strSec = strWholeSec;
	if (strFractionSec.length)
	{
		strSec = strSec+ "." + strFractionSec;
	}
	if ((ts % 3600) != 0 )
		var hour = 0;
	else var hour = (ts / 3600);
	if ( (tmp % 60) != 0 )
		var min = 0;
	else var min = (tmp / 60);
	if ((new String(hour)).length < 2)
		hour = "0"+hour;
	if ((new String(min)).length < 2)
		min = "0"+min;
	var rtnVal = hour+":"+min+":"+strSec;
	return rtnVal
}
/**
 * Handles the use of the back button (saves data and closes SCO)
 */
function doBack()
{  
	checkAnswers(true);
	doLMSSetValue( "cmi.core.exit", "suspend" );
	computeTime();
	exitPageStatus = true;
	var result;
	result = doLMSCommit();
	result = doLMSFinish();
}
/**
 * Handles the closure of the current SCO before an interruption. This is only useful if the LMS
 * deals with the cmi.core.exit, cmi.core.lesson_status and cmi.core.lesson_mode *and* the SCO
 * sends some kind of value for cmi.core.exit, which is not the case here (yet).
 */
function doContinue(status)
{
	// Reinitialize Exit to blank
	doLMSSetValue( "cmi.core.exit", "" );
	var mode = doLMSGetValue( "cmi.core.lesson_mode" );
	if ( mode != "review"  &&  mode != "browse" )
	{
		doLMSSetValue( "cmi.core.lesson_status", status );
	}
	computeTime();
	exitPageStatus = true;
	var result;
	result = doLMSCommit();
	result = doLMSFinish();
}
/**
 * handles the recording of everything on a normal shutdown
 */
function doQuit()
{
	checkAnswers();
	computeTime();
	exitPageStatus = true;
	var result;
	result = doLMSCommit();
	result = doLMSFinish();
}
/**
 * Called upon unload event from body element
 */
function unloadPage(status)
{
    if (exitPageStatus != true)
    {
            doQuit( status );
    }
}
/**
 * Third section - depending on Dokeos - check answers and set score
 */
var questions = new Array();
var questions_answers = new Array();
var questions_answers_correct = new Array();
var questions_types = new Array();
var questions_score_max = new Array();
var questions_answers_ponderation = new Array();
/**
 * Checks the answers on the test formular page
 */
function checkAnswers(interrupted)
{
	var tmpScore = 0;
	var status = 'not attempted';
	var scoreMax = 0;
	for(var i=0; i<questions.length;i++)
	{
		if(questions[i] != undefined && questions[i] != null){
			var idQuestion = questions[i];
			var type = questions_types[idQuestion];
			var interactionScore = 0;
			var interactionAnswers = '';
			var interactionCorrectResponses = '';
			var interactionType = '';
			if (type == 'mcma')
			{
				var interactionType = 'choice';
				var myScore = 0;
				for(var j=0; j<questions_answers[idQuestion].length;j++)
				{
					var idAnswer = questions_answers[idQuestion][j];
					var answer = document.getElementById('question_'+(idQuestion)+'_multiple_'+(idAnswer));
					if(answer.checked == true)
					{
						interactionAnswers += idAnswer+',';
						for(k=0;k<questions_answers_correct[idQuestion].length;k++)
						{
							if(questions_answers_correct[idQuestion][k] == idAnswer)
							{
								if(questions_answers_ponderation[idQuestion][idAnswer])
								{
									myScore += questions_answers_ponderation[idQuestion][idAnswer];
								}
								else
								{
									myScore ++;
								}
							}
						}
					}
				}
				interactionScore = myScore;
				//correct responses work by pattern, see SCORM Runtime Env Doc
				//for(k=0;k<questions_answers_correct[idQuestion].length;k++)
				//{
				//	interactionCorrectResponses += questions_answers_correct[idQuestion][k].toString()+',';
				//}
				scoreMax += questions_score_max[idQuestion];
			}
			else if(type == 'mcua')
			{
				var interactionType = 'choice';
				var myScore = 0;
				for(var j=0; j<questions_answers[idQuestion].length;j++)
				{
					var idAnswer = questions_answers[idQuestion][j];
					var answer = document.getElementById('question_'+(idQuestion)+'_unique_'+(idAnswer));
					if(answer.checked == true)
					{
						interactionAnswers += idAnswer;
						if(questions_answers_correct[idQuestion] == idAnswer)
						{
							if(questions_answers_ponderation[idQuestion][idAnswer])
							{
								myScore += questions_answers_ponderation[idQuestion][idAnswer];
							}
							else
							{
								myScore ++;
							}
						}
					}
				}
				interactionScore = myScore;
				//correct responses work by pattern, see SCORM Runtime Env Doc
				//interactionCorrectResponses += questions_answers_correct[idQuestion].toString();
				scoreMax += questions_score_max[idQuestion];
			}
			else if(type == 'tf')
			{
				var interactionType = 'true-false';
				var myScore = 0;
				for(var j=0; j<questions_answers[idQuestion].length;j++)
				{
					var idAnswer = questions_answers[idQuestion][j];
					var answer = document.getElementById('question_'+(idQuestion)+'_tf_'+(idAnswer));
					if(answer.checked.value == true)
					{
						interactionAnswers += idAnswer;
						for(k=0;k<questions_answers_correct[idQuestion].length;k++)
						{
							if(questions_answers_correct[idQuestion][k] == idAnswer)
							{
								if(questions_answers_ponderation[idQuestion][idAnswer])
								{
									myScore += questions_answers_ponderation[idQuestion][idAnswer];
								}
								else
								{
									myScore ++;
								}
							}
						}
					}
				}
				interactionScore = myScore;
				//correct responses work by pattern, see SCORM Runtime Env Doc
				//interactionCorrectResponses += questions_answers_correct[idQuestion].toString();
				scoreMax += questions_score_max[idQuestion];
			}
			else if(type == 'fib')
			{
				var interactionType = 'fill-in';
				var myScore = 0;
				for(var j=0; j<questions_answers[idQuestion].length;j++)
				{
					var idAnswer = questions_answers[idQuestion][j];
					var answer = document.getElementById('question_'+(idQuestion)+'_fib_'+(idAnswer));
					if(answer.value)
					{
						interactionAnswers += answer.value+',';
						for(k=0;k<questions_answers_correct[idQuestion].length;k++)
						{
							if(questions_answers_correct[idQuestion][k] == answer.value)
							{
								if(questions_answers_ponderation[idQuestion][idAnswer])
								{
									myScore += questions_answers_ponderation[idQuestion][idAnswer];
								}
								else
								{
									myScore ++;
								}
							}
						}
					}
				}
				interactionScore = myScore;
				//correct responses work by pattern, see SCORM Runtime Env Doc
				//for(k=0;k<questions_answers_correct[idQuestion].length;k++)
				//{
				//	interactionCorrectResponses += questions_answers_correct[idQuestion][k].toString()+',';
				//}
				scoreMax += questions_score_max[idQuestion];
			}
			else if(type == 'matching')
			{
				var interactionType = 'matching';
				var myScore = 0;
				for(var j=0; j<questions_answers[idQuestion].length;j++)
				{
					var idAnswer = questions_answers[idQuestion][j];
					var answer = document.getElementById('question_'+(idQuestion)+'_matching_'+(idAnswer));
					if(answer && answer.value)
					{
						interactionAnswers += answer.value+',';
						for(k=0;k<questions_answers_correct[idQuestion].length;k++)
						{
							var left = questions_answers_correct[idQuestion][k][0];
							var right = questions_answers_correct[idQuestion][k][1];
							if(left == idAnswer && right == answer.value)
							{
								if(questions_answers_ponderation[idQuestion][idAnswer])
								{
									myScore += questions_answers_ponderation[idQuestion][idAnswer];
								}
								else
								{
									myScore ++;
								}
							}
						}
					}
				}
				interactionScore = myScore;
				//correct responses work by pattern, see SCORM Runtime Env Doc
				//for(k=0;k<questions_answers_correct[idQuestion].length;k++)
				//{
				//	interactionCorrectResponses += questions_answers_correct[idQuestion][k].toString()+',';
				//}
				scoreMax += questions_score_max[idQuestion];
			}
			else if(type == 'free')
			{	//ignore for now as a score cannot be given
				var interactionType = 'likert';
				interactionScore = 0;
				//interactionAnswers = document.getElementById('question_'+(idQuestion)+'_free').value;
				//correct responses work by pattern, see SCORM Runtime Env Doc
				//interactionCorrectResponses += questions_answers_correct[idQuestion].toString();
			}
			else if(type == 'hotspot')
			{
				var interactionType = 'sequencing';
				//if(question_score && question_score[idQuestion]){
				//	interactionScore = question_score[idQuestion];
				//} //else, 0
				//interactionAnswers = document.getElementById('question_'+(idQuestion)+'_free').innerHTML;
				//correct responses work by pattern, see SCORM Runtime Env Doc
				//for(k=0;k<questions_answers_correct[idQuestion].length;k++)
				//{
				//	interactionCorrectResponses += questions_answers_correct[idQuestion][k].toString()+',';
				//}
			}
			else
			{
				//
			}
			tmpScore += interactionScore;

			doLMSSetValue('cmi.interactions.'+idQuestion+'.id','Q'+idQuestion);
			doLMSSetValue('cmi.interactions.'+idQuestion+'.type',interactionType);
			doLMSSetValue('cmi.interactions.'+idQuestion+'.student_response',interactionAnswers);
			doLMSSetValue('cmi.interactions.'+idQuestion+'.result',interactionScore);
			//correct responses work by pattern, see SCORM Runtime Env Doc
			//doLMSSetValue('cmi.interactions.'+idQuestion+'.correct_responses',questions_answers_correct[idQuestion]);		
			//doLMSSetValue('cmi.interactions.'+idQuestion+'.correct_responses',interactionCorrectResponses);		
		}
	}
	doLMSSetValue('cmi.core.score.min',0);
	doLMSSetValue('cmi.core.score.max',scoreMax);
	doLMSSetValue('cmi.core.score.raw',tmpScore);
	//doLMSSetValue('cmi.student_data.mastery_score',(scoreMax*0.7));
	//get status
	var mastery_score = doLMSGetValue('cmi.student_data.mastery_score');
	if(mastery_score <= 0)
	{
		mastery_score = (scoreMax*0.80);
	}
	if(tmpScore > mastery_score)
	{
		status = 'passed';
	}
	else
	{
		status = 'failed';
	}
	doLMSSetValue('cmi.core.lesson_status',status);

	if((interrupted==true) && (status != 'completed') && (status != 'passed'))
	{
		doLMSSetValue('cmi.core.exit','suspended');
	}
	else
	{
	}
	return false; //do not submit the form
}