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<?php
if(isset($_POST['listVariantObjects'])){
//Used to update the list of dataobjects stored for each quiz variant
function updateDataObjectList($quizNr, $qVarNr, $courseName, $pdo){
$queryString = "SELECT QuizVariantObject.id
FROM QuizVariantObject
WHERE QuizVariantObject.quizNr=:QNR
AND QuizVariantObject.qVarNr=:QVNR
AND QuizVariantObject.quizCourseName=:CNAME;";
$stmt = $pdo->prepare($queryString);
$stmt->bindParam(':QVNR', $qVarNr);
$stmt->bindParam(':QNR', $quizNr);
$stmt->bindParam(':CNAME', $courseName);
$stmt->execute();
$quizVariantIds=$stmt->fetchAll(PDO::FETCH_ASSOC);
$dataObjectsString="";
foreach($quizVariantIds as $objectId){
$dataObjectsString.=$objectId['id']." ";
}
$dataObjectsString=trim($dataObjectsString);
$updateString = "UPDATE QuizVariant
SET QuizVariant.quizObjectIDs=:OBJECTIDS
WHERE QuizVariant.qVarNr=:QVNR
AND QuizVariant.quizNr=:QNR
AND QuizVariant.quizCourseName=:CNAME;";
$updateStmt = $pdo->prepare($updateString);
$updateStmt->bindParam(':OBJECTIDS', $dataObjectsString);
$updateStmt->bindParam(':QNR', $quizNr);
$updateStmt->bindParam(':QVNR', $qVarNr);
$updateStmt->bindParam(':CNAME', $courseName);
$updateStmt->execute();
/*
if($updateStmt->execute()){
$userMsg.=" Object ID list for quiz ".$quizNr." variant ".$qVarNr." successfully updated";
} else {
$errorMsg.="ERROR: Object ID list for quiz ".$quizNr." variant ".$qVarNr." FAILED to update";
}*/
$updateStmt->closeCursor();
}
//updateDataObject
if(isset($_POST['updateDataObject'])){
$updateString = "UPDATE QuizVariantObject
SET QuizVariantObject.id=:NEWID, QuizVariantObject.objectData=:OBJECTDATA
WHERE QuizVariantObject.id=:ID
AND QuizVariantObject.qVarNr=:QVNR
AND QuizVariantObject.quizNr=:QNR
AND QuizVariantObject.quizCourseName=:CNAME;";
$updateStmt = $pdo->prepare($updateString);
$updateStmt->bindParam(':ID', $_POST['objectId']);
$updateStmt->bindParam(':NEWID', $_POST['newObjectId']);
$objectData=htmlentities($_POST['objectData'], ENT_QUOTES, "UTF-8");
$updateStmt->bindParam(':OBJECTDATA', $objectData);
$updateStmt->bindParam(':QNR', $_POST['quizNr']);
$updateStmt->bindParam(':QVNR', $_POST['qVarNr']);
$updateStmt->bindParam(':CNAME', $_POST['courseName']);
if($updateStmt->execute()){
$userMsg.="Object successfully updated";
$updatedObjectId=$_POST['newObjectId'];
$objectUpdateMsg="Saved";
} else {
$errorMsg.="ERROR: Object update failed";
$updatedObjectId=$_POST['newObjectId'];
$objectUpdateMsg="Failed";
}
$updateStmt->closeCursor();
updateDataObjectList($_POST['quizNr'], $_POST['qVarNr'], $_POST['courseName'], $pdo);
}
//deleteDataObject
if(isset($_POST['deleteDataObject'])){
// $deleteQuery = "DELETE FROM QuizVariantObject
// WHERE QuizVariantObject.id=:ID
// AND QuizVariantObject.qVarNr=:QVNR
// AND QuizVariantObject.quizNr=:QNR
// AND QuizVariantObject.quizCourseName=:CNAME";
// $deleteStmt = $pdo->prepare($deleteQuery);
// $deleteStmt->bindParam(':ID', $_POST['objectId']);
// $deleteStmt->bindParam(':QNR', $_POST['quizNr']);
// $deleteStmt->bindParam(':CNAME', $_POST['courseName']);
// $deleteStmt->bindParam(':QVNR', $_POST['qVarNr']);
// if($deleteStmt->execute()){
// $userMsg.="Object ID ".$_POST['objectId']." successfully deleted";
// } else {
// $errorMsg.="ERROR: Object ID ".$_POST['objectId']." NOT deleted";
// }
// updateDataObjectList($_POST['quizNr'], $_POST['qVarNr'], $_POST['courseName'], $pdo);
$errorMsg.="ERROR: Object ID ".$_POST['objectId']." NOT deleted - FUNCTION DISABLED";
}
//addDataObject
if(isset($_POST['addDataObject'])){
$insertString = "INSERT INTO QuizVariantObject(id, qVarNr, quizNr, quizCourseName, objectData) VALUES(:ID,:QVNR,:QNR,:CNAME,:OBJECTDATA);";
$insertStmt = $pdo->prepare($insertString);
$insertStmt->bindParam(':ID', $_POST['newObjectId']);
$insertStmt->bindParam(':QNR', $_POST['quizNr']);
$insertStmt->bindParam(':CNAME', $_POST['courseName']);
$insertStmt->bindParam(':QVNR', $_POST['qVarNr']);
$objectData=htmlsafe($_POST['objectData']);
$insertStmt->bindParam(':OBJECTDATA', $objectData);
if($insertStmt->execute()){
$userMsg.="Object ID ".$_POST['newObjectId']." successfully added";
} else {
$errorMsg.="ERROR: Object ID ".$_POST['newObjectId']." NOT added";
}
updateDataObjectList($_POST['quizNr'], $_POST['qVarNr'], $_POST['courseName'], $pdo);
}
//Fetch all data objects in selected quiz variant
$queryString = "SELECT *
FROM QuizVariantObject
WHERE QuizVariantObject.qVarNr=:QVNR
AND QuizVariantObject.quizNr=:QNR
AND quizCourseName=:CNAME;";
$stmt = $pdo->prepare($queryString);
$stmt->bindParam(':QVNR', $_POST['qVarNr']);
$stmt->bindParam(':QNR', $_POST['quizNr']);
$stmt->bindParam(':CNAME', $_POST['courseName']);
$stmt->execute();
$quizVariantObjects=$stmt->fetchAll(PDO::FETCH_ASSOC);
//Fetch data for the selected variant
$queryString = "SELECT *
FROM QuizVariant
WHERE quizNr=:QNR
AND qVarNr=:QVNR
AND quizCourseName=:CNAME;";
$stmt = $pdo->prepare($queryString);
$stmt->bindParam(':QNR', $_POST['quizNr']);
$stmt->bindParam(':QVNR', $_POST['qVarNr']);
$stmt->bindParam(':CNAME', $_POST['courseName']);
$stmt->execute();
$quizVariant=$stmt->fetch(PDO::FETCH_ASSOC);
$content="quiz/listDataObjects.html.php";
} else if(isset($_POST['editSelectedQuiz']) || isset($_POST['addQuizSubmit'])){ //If user selected add or edit quiz
if(isset($_POST['editSelectedQuiz'])){
$queryString = "SELECT Quiz.nr, Quiz.courseName, Quiz.opening, Quiz.closing, Quiz.quizData, Quiz.autoCorrected, Quiz.allowMultipleReplies, Quiz.quizURI
FROM Quiz
WHERE nr=:QNR AND courseName=:CNAME";
$stmt = $pdo->prepare($queryString);
$stmt->bindParam(':QNR', $_POST['quizNr']);
$stmt->bindParam(':CNAME', $_POST['courseName']);
$stmt->execute();
$quiz=$stmt->fetch(PDO::FETCH_ASSOC);
}
$content="quiz/addEditQuiz.html.php";
} else if(isset($_POST['listVariantsForSelectedQuiz'])){
//Add new variant of quiz
if(isset($_POST['addVariantToQuizFormSubmit'])){
$insertString = "INSERT INTO QuizVariant(qVarNr, quizNr, quizCourseName, correctAnswer) VALUES(:QVNR, :QNR,:CNAME,:CANSWER);";
$insertStmt = $pdo->prepare($insertString);
$insertStmt->bindParam(':QNR', $_POST['quizNr']);
$insertStmt->bindParam(':CNAME', $_POST['courseName']);
$insertStmt->bindParam(':QVNR', $_POST['newQVarNr']);
$insertStmt->bindParam(':CANSWER', $_POST['correctAnswer']);
if($insertStmt->execute()){
$userMsg.="Variant nr: ".$_POST['newQVarNr']." for quiz nr: ".$_POST['quizNr']." successfully added";
$_POST['qVarNr']=$_POST['newQVarNr']+1;
} else {
$errorMsg.="ERROR: Variant nr: ".$_POST['qVarNr']." for quiz nr: ".$_POST['quizNr']." NOT added";
}
}
//Apply changes to variant of quiz
if(isset($_POST['editVariantOfQuizFormSubmit'])){
$updateString = "UPDATE QuizVariant
SET QuizVariant.qVarNr=:NEWQVNR, QuizVariant.correctAnswer=:CANSWER
WHERE QuizVariant.qVarNr=:QVNR
AND QuizVariant.quizNr=:QNR
AND QuizVariant.quizCourseName=:CNAME;";
$updateStmt = $pdo->prepare($updateString);
$updateStmt->bindParam(':NEWQVNR', $_POST['newQVarNr']);
$updateStmt->bindParam(':CANSWER', $_POST['correctAnswer']);
$updateStmt->bindParam(':QNR', $_POST['quizNr']);
$updateStmt->bindParam(':QVNR', $_POST['qVarNr']);
$updateStmt->bindParam(':CNAME', $_POST['courseName']);
if($updateStmt->execute()){
$userMsg.="Variant nr: ".$_POST['qVarNr']." for quiz nr: ".$_POST['quizNr']." successfully updated";
$_POST['qVarNr']=$_POST['newQVarNr'];
} else {
$errorMsg.="ERROR: Variant nr: ".$_POST['qVarNr']." for quiz nr: ".$_POST['quizNr']." NOT updated";
}
$updateStmt->closeCursor();
}
//deleteVariantOfQuizSubmit
//Delete variant of quiz (and all quiz-assignments to students)
if(isset($_POST['deleteVariantOfQuizSubmit'])){
// $deleteQuery = "DELETE FROM QuizVariant
// WHERE QuizVariant.qVarNr=:QVNR
// AND QuizVariant.quizNr=:QNR
// AND QuizVariant.quizCourseName=:CNAME";
// $deleteStmt = $pdo->prepare($deleteQuery);
// $deleteStmt->bindParam(':QNR', $_POST['quizNr']);
// $deleteStmt->bindParam(':CNAME', $_POST['courseName']);
// $deleteStmt->bindParam(':QVNR', $_POST['qVarNr']);
// if($deleteStmt->execute()){
// $userMsg.="Variant nr: ".$_POST['qVarNr']." for quiz nr: ".$_POST['quizNr']." successfully deleted";
// } else {
// $errorMsg.="ERROR: Variant nr: ".$_POST['qVarNr']." for quiz nr: ".$_POST['quizNr']." NOT deleted";
// }
$errorMsg.="ERROR: Variant nr: ".$_POST['qVarNr']." for quiz nr: ".$_POST['quizNr']." NOT deleted - FUNCTION DISABLED";
}
//Fetch all variants of selected quiz
$queryString = "SELECT QuizVariant.qVarNr, QuizVariant.quizNr, QuizVariant.quizCourseName, QuizVariant.correctAnswer, QuizVariant.quizObjectIDs, Quiz.quizURI
FROM QuizVariant, Quiz
WHERE Quiz.nr=QuizVariant.quizNr
AND QuizVariant.quizNr=:QNR
AND quizCourseName=:CNAME;";
$stmt = $pdo->prepare($queryString);
$stmt->bindParam(':QNR', $_POST['quizNr']);
$stmt->bindParam(':CNAME', $_POST['courseName']);
$stmt->execute();
$quizVariants=$stmt->fetchAll(PDO::FETCH_ASSOC);
$content="quiz/editVariants.html.php";
} else { //Else display course selection
//Delete quiz from course (and all variants of the quiz and all quiz-assignments to students)
if(isset($_POST['deleteSelectedQuiz'])){
// $deleteQuery = "DELETE FROM Quiz
// WHERE Quiz.nr=:QNR
// AND Quiz.courseName=:CNAME";
// $deleteStmt = $pdo->prepare($deleteQuery);
// $deleteStmt->bindParam(':QNR', $_POST['quizNr']);
// $deleteStmt->bindParam(':CNAME', $_POST['courseName']);
// if($deleteStmt->execute()){
// $userMsg.="Quiz nr: ".$_POST['quizNr']." successfully deleted from ".$_POST['courseName'];
// } else {
// $errorMsg.="ERROR: Could not delete Quiz nr: ".$_POST['quizNr']." from ".$_POST['courseName'];
// }
$errorMsg.="ERROR: Could not delete Quiz nr: ".$_POST['quizNr']." from ".$_POST['courseName']." - FUNCTION DISABLED";
}
//Make submitted changes to quiz
if(isset($_POST['submitChangesToQuizSubmit'])){
$updateString = "UPDATE Quiz
SET Quiz.nr=:NEWQNR, Quiz.opening=:OPEN, Quiz.closing=:CLOSE, Quiz.quizData=:QDATA, Quiz.autoCorrected=:AUTO, Quiz.allowMultipleReplies=:MULTIPLE, Quiz.quizURI=:QURI
WHERE Quiz.nr=:QNR AND Quiz.courseName=:CNAME;";
$updateStmt = $pdo->prepare($updateString);
$updateStmt->bindParam(':OPEN', $_POST['quizOpeningDateTime']);
$updateStmt->bindParam(':CLOSE', $_POST['quizClosingDateTime']);
if($_POST['quizAutoCorrected']!="")
$autoCorrected=1;
else
$autoCorrected=0;
$updateStmt->bindParam(':AUTO', $autoCorrected);
if($_POST['allowMultipleReplies']!="")
$allowMultipleReplies=1;
else
$allowMultipleReplies=0;
$updateStmt->bindParam(':MULTIPLE', $allowMultipleReplies);
$quizData=htmlsafe($_POST['quizData']);
$updateStmt->bindParam(':QDATA', $quizData);
$updateStmt->bindParam(':QNR', $_POST['quizNr']);
if($_POST['allowMultipleReplies']!="")
$allowMultipleReplies=1;
else
$allowMultipleReplies=0;
$updateStmt->bindParam(':MULTIPLE', $allowMultipleReplies);
$updateStmt->bindParam(':QURI', $_POST['quizURI']);
$updateStmt->bindParam(':NEWQNR', $_POST['newQuizNr']);
$updateStmt->bindParam(':CNAME', $_POST['courseName']);
if($updateStmt->execute()){
$userMsg.="Quiz nr: ".$_POST['quizNr']." for ".$_POST['courseName']." successfully updated";
} else {
$errorMsg.="ERROR: Quiz nr: ".$_POST['quizNr']." for ".$_POST['courseName']." NOT updated";
}
}
//Add new quiz to course
if(isset($_POST['addQuizToCourseSubmit'])){
$insertString = "INSERT INTO Quiz(nr, courseName, opening, closing, autoCorrected, allowMultipleReplies, quizURI, quizData)
VALUES(:QNR,:CNAME,:OPEN,:CLOSE,:AUTO,:MULTIPLE,:QURI,:QDATA);";
$insertStmt = $pdo->prepare($insertString);
$insertStmt->bindParam(':QNR', $_POST['newQuizNr']);
$insertStmt->bindParam(':CNAME', $_POST['courseName']);
$insertStmt->bindParam(':OPEN', $_POST['quizOpeningDateTime']);
$insertStmt->bindParam(':CLOSE', $_POST['quizClosingDateTime']);
if($_POST['quizAutoCorrected']!="")
$autoCorrected=1;
else
$autoCorrected=0;
$insertStmt->bindParam(':AUTO', $autoCorrected);
if($_POST['allowMultipleReplies']!="")
$allowMultipleReplies=1;
else
$allowMultipleReplies=0;
$insertStmt->bindParam(':MULTIPLE', $allowMultipleReplies);
$insertStmt->bindParam(':QURI', $_POST['quizURI']);
$quizData=htmlsafe($_POST['quizData']);
$insertStmt->bindParam(':QDATA', $quizData);
if($insertStmt->execute()){
$userMsg.="Quiz for ".$_POST['courseName']." successfully added";
} else {
$errorMsg.="ERROR: Quiz for ".$_POST['courseName']." NOT added";
}
}
//Fetch all quizzes for selected course
if(isset($_POST['listQuizzesSubmit'])){
$queryString = "SELECT Quiz.nr, Quiz.courseName, Quiz.opening, Quiz.closing, Quiz.autoCorrected, Quiz.allowMultipleReplies, Quiz.quizURI
FROM Quiz
WHERE Quiz.courseName=:CNAME;";
$stmt = $pdo->prepare($queryString);
$stmt->bindParam(':CNAME', $_POST['courseName']);
$stmt->execute();
$quizList=$stmt->fetchAll(PDO::FETCH_ASSOC);
}
//Fetch all courses from Course-table to populate dropdown-list
$queryString = "SELECT * FROM Course";
$stmt = $pdo->prepare($queryString);
$stmt->execute();
$courseList=$stmt->fetchAll(PDO::FETCH_ASSOC);
$content="quiz/listQuizzes.html.php";
}
?>
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