public IudicoCourseInfo GetCourseInfo(int id)
{
var db = this.GetDbContext();
var courseInfo = new IudicoCourseInfo { Id = id };
var databaseNodesInfo = db.NodesInfo.Where(n => n.CourseId == id);
foreach (var ni in databaseNodesInfo)
{
var nodeInfo = new IudicoNodeInfo { CourseId = id, Id = ni.NodeId };
var databaseQuestionsInfo = db.QuestionsInfo.Where(q => q.NodeId == ni.NodeId);
foreach (var qi in databaseQuestionsInfo)
{
IudicoQuestionInfo questionInfo = null;
switch (qi.Type)
{
case 1:
var simpleQuestion = db.SimpleQuestions.Single(q => q.QuestionId == qi.Id);
questionInfo = new IudicoSimpleQuestion
{
QuestionText = qi.Text,
MaxScore = qi.MaxScore,
Type = IudicoQuestionType.IudicoSimple,
CorrectAnswer = simpleQuestion.CorrectAnswer
};
break;
case 2:
var options = db.ChoiceQuestionsOptions.Where(q => q.QuestionId == qi.Id);
var correctChoice = db.ChoiceQuestionsCorrectChoices.Single(q => q.QuestionId == qi.Id);
questionInfo = new IudicoChoiceQuestion
{
QuestionText = qi.Text,
MaxScore = qi.MaxScore,
Type = IudicoQuestionType.IudicoChoice,
CorrectChoice = correctChoice.CorrectChoice,
Options = (from o in options
select new Tuple<string, string>(o.Option, o.Description)).ToList()
};
break;
case 3:
var compiledTests = db.CompiledTestQuestions.Where(q => q.QuestionId == qi.Id);
questionInfo = new IudicoCompiledTest
{
QuestionText = qi.Text,
MaxScore = qi.MaxScore,
Type = IudicoQuestionType.IudicoCompile,
TestInputs = (from ct in compiledTests
select new Tuple<string, string>("testInput" + ct.TestNumber, ct.TestInput)).ToList(),
TestOutputs = (from ct in compiledTests
select new Tuple<string, string>("testOutput" + ct.TestNumber, ct.TestOutput)).ToList(),
};
break;
}
nodeInfo.QuestionsInfo.Add(questionInfo);
}
courseInfo.NodesInfo.Add(nodeInfo);
}
return courseInfo;
}
private static IudicoNodeInfo ParseNode(Node node, ICourseStorage storage)
{
IudicoNodeInfo ni = new IudicoNodeInfo();
ni.Id = node.Id;
ni.CourseId = node.CourseId;
var path = storage.GetNodePath(node.Id) + ".html";
TextReader reader = File.OpenText(path);
XmlDocument xmlDoc = FromHtml(reader);
// find iudico object nodes <object iudico-question="..." ... >
foreach (XmlElement el in xmlDoc.GetElementsByTagName("object"))
{
bool iudicoQuestion = false;
IudicoQuestionInfo qi = null;
// check if it is iudico object
if (el.Attributes["iudico-question"] != null && el.Attributes["iudico-question"].Value == "true")
{
iudicoQuestion = true;
switch (el.Attributes["iudico-type"].Value)
{
case "iudico-simple":
qi = new IudicoSimpleQuestion { Type = IudicoQuestionType.IudicoSimple };
break;
case "iudico-choice":
qi = new IudicoChoiceQuestion { Type = IudicoQuestionType.IudicoChoice };
break;
case "iudico-compile":
qi = new IudicoCompiledTest { Type = IudicoQuestionType.IudicoCompile };
break;
}
}
if (iudicoQuestion == true)
{
// <param name="..." value="..." />
foreach (XmlNode xmlNode in el.ChildNodes)
{
if (xmlNode.Attributes["name"] != null && xmlNode.Attributes["name"].Value == "rank")
{
double score = 0;
double.TryParse(xmlNode.Attributes["value"].Value, out score);
qi.MaxScore += score;
}
if (xmlNode.Attributes["name"] != null && xmlNode.Attributes["name"].Value == "question")
{
qi.QuestionText = xmlNode.Attributes["value"].Value;
}
switch (qi.Type)
{
case IudicoQuestionType.IudicoSimple:
if (xmlNode.Attributes["name"] != null && xmlNode.Attributes["name"].Value == "correctAnswer")
{
(qi as IudicoSimpleQuestion).CorrectAnswer = xmlNode.Attributes["value"].Value;
}
break;
case IudicoQuestionType.IudicoChoice:
if (xmlNode.Attributes["name"] != null && xmlNode.Attributes["name"].Value == "correct")
{
(qi as IudicoChoiceQuestion).CorrectChoice = xmlNode.Attributes["value"].Value;
}
if (xmlNode.Attributes["name"] != null && xmlNode.Attributes["name"].Value.StartsWith("option"))
{
(qi as IudicoChoiceQuestion).Options.Add(new Tuple<string, string>(xmlNode.Attributes["name"].Value, xmlNode.Attributes["value"].Value));
}
break;
case IudicoQuestionType.IudicoCompile:
if (xmlNode.Attributes["name"] != null && xmlNode.Attributes["name"].Value.StartsWith("testInput"))
{
(qi as IudicoCompiledTest).TestInputs.Add(new Tuple<string, string>(xmlNode.Attributes["name"].Value, xmlNode.Attributes["value"].Value));
}
if (xmlNode.Attributes["name"] != null && xmlNode.Attributes["name"].Value.StartsWith("testOutput"))
{
(qi as IudicoCompiledTest).TestOutputs.Add(new Tuple<string, string>(xmlNode.Attributes["name"].Value, xmlNode.Attributes["value"].Value));
}
break;
}
}
ni.QuestionsInfo.Add(qi);
}
}
return ni;
}
