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query.php
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query.php
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<?php
require_once ('db.php');
// vars
$queryType = @$_POST['Query'];
// TestConnection: used by ppt plugin to see if can connect
if ($queryType == 'TestConnection') {
echo TRUE;
exit(0);
}
// CreateQuestion: populates db with class info and sends texts/emails
if($queryType == 'CreateQuestion') {
$class_id = @$_POST['ClassId'];
$teacher_name = @$_POST['TeacherName'];
$teacher_email = @$_POST['TeacherEmail'];
$teacher_password= @$_POST['TeacherPassword'];
//Authenticate....
$quiz_title = @$_POST['Title'];
$question = @$_POST['Question'];
$success = TRUE;
$query = "INSERT INTO quiz (Title, Question, ClassId) VALUES ('{$quiz_title}', '{$question}', '{$class_id}')";
$result = $mysqli->query($query) or die($mysqli->error.__LINE__);
$success = ($success && $result);
$query = "DELETE FROM response WHERE ClassId=$class_id";
$result = $mysqli->query($query) or die($mysqli->error.__LINE__);
$success = ($success && $result);
echo $success;
$result->free();
// CLOSE CONNECTION
$mysqli->close();
return;
}
//OpenQuiz
if($queryType == 'OpenQuiz') {
$class_id = @$_POST['ClassId'];
$query = "SELECT class.StudentIds FROM hackdukedatabase.class WHERE ClassId='{$class_id}'";
$result = $mysqli->query($query) or die($mysqli->error.__LINE__);
if($result==TRUE){
$row = mysqli_fetch_array($result, MYSQLI_NUM);
} else {
$result->free();
// CLOSE CONNECTION
$mysqli->close();
exit(0);
return;
}
$result->free();
$subquery = "";
$students = explode(',',$row[0]);
foreach ($students as &$std) {
$subquery = $subquery."({$class_id}, {$std}),";
}
substr_replace($subquery ,"",-1); //remove extra comma
$query = "INSERT INTO classlog (ClassId, StudentId) VALUES {$subquery}";
$result = $mysqli->query($query) or die($mysqli->error.__LINE__);
if($result==TRUE){
$row = mysqli_fetch_array($result, MYSQLI_NUM);
} else {
$result->free();
// CLOSE CONNECTION
$mysqli->close();
exit(0);
return;
}
$result->free();
// CLOSE CONNECTION
$mysqli->close();
return;
}
// GetResponse: returns comma separated student responses
if ($queryType == 'GetResponse') {
$classId = @$_POST['ClassId'];
$query = "SELECT response.Response, response.StudentId FROM hackdukedatabase.response WHERE ClassId ='{$classId}' GROUP BY response.StudentId ORDER BY response.AddedOn DESC";
$result = $mysqli->query($query) or die($mysqli->error.__LINE__);
if(!is_null($result)){
$rows = array();
while (($row = mysqli_fetch_array($result, MYSQLI_NUM)) != NULL) {
array_push($rows, $row[1]);
array_push($rows, $row[0]);
}
$str = implode (",", $rows);
echo $str;
$result->free();
// CLOSE CONNECTION
$mysqli->close();
exit(0);
}
$result->free();
// CLOSE CONNECTION
$mysqli->close();
exit(0);
}
// GetClasses: returns comma separated class ids from teacher name
if ($queryType == 'GetClasses') {
$teacher_name = @$_POST['TeacherName'];
$query = "SELECT class.ClassId FROM hackdukedatabase.class WHERE TeacherName='{$teacher_name}'";
$result = $mysqli->query($query) or die($mysqli->error.__LINE__);
if($result==TRUE){
$rows = array();
while ($row = mysqli_fetch_array($result, MYSQLI_NUM)) {
array_push($rows, $row[0]);
}
$str = implode (",", $rows);
echo $str;
$result->free();
// CLOSE CONNECTION
$mysqli->close();
exit(0);
return;
}
$result->free();
// CLOSE CONNECTION
$mysqli->close();
exit(0);
return;
}
// GetStudents: returns comma separated student ids given a class id
if ($queryType == 'GetStudents') {
$class_id = @$_POST['ClassId'];
$query = "SELECT class.StudentIds FROM hackdukedatabase.class WHERE ClassId='{$class_id}'";
$result = $mysqli->query($query) or die($mysqli->error.__LINE__);
if($result==TRUE){
$row = mysqli_fetch_array($result, MYSQLI_NUM);
echo $row[0];
$result->free();
// CLOSE CONNECTION
$mysqli->close();
exit(0);
return;
}
$result->free();
// CLOSE CONNECTION
$mysqli->close();
exit(0);
return;
}
// GetStudents: returns comma separated student information given a class id
if ($queryType == 'GetStudentsInfo') {
$class_id = @$_POST['ClassId'];
$query = "SELECT class.StudentIds FROM hackdukedatabase.class WHERE ClassId='{$class_id}'";
$result = $mysqli->query($query) or die($mysqli->error.__LINE__);
if($result==TRUE){
$row = mysqli_fetch_array($result, MYSQLI_NUM);
} else {
$result->free();
// CLOSE CONNECTION
$mysqli->close();
exit(0);
return;
}
$result->free();
$query = "SELECT student.StudentId, student.FirstName, student.LastName, student.PhoneNumber, student.Email FROM hackdukedatabase.student WHERE student.StudentId IN ({$row[0]})";
$result = $mysqli->query($query) or die($mysqli->error.__LINE__);
if($result==TRUE){
$rows = array();
while ($row = mysqli_fetch_array($result, MYSQLI_NUM)) {
array_push($rows, $row[0]);
array_push($rows, $row[1]);
}
$str = implode (",", $rows);
echo $str;
}
$result->free();
// CLOSE CONNECTION
$mysqli->close();
exit(0);
return;
}
if ($queryType == 'SetStudentsInfo') {
$class_id = @$_POST['ClassId'];
$j = 0;
$post = implode(",", @$_POST['StudentsInfo']);
for ($i = 0; $i < count($row); $i++)
{
$std_id = @$post[$i];
$std_first_name = @$post[$i + 1];
$std_last_name = @$post[$i + 2];
$std_phone = @$post[$i + 3];
$std_email = @$post[$i + 4];
$j += 5;
$query .= "UPDATE student.StudentId={$std_id}, student.FirstName={$std_first_name}, student.LastName={$std_last_name}, student.PhoneNumber={$std_phone}, student.Email={$std_email} FROM hackdukedatabase.student WHERE student.StudentId='{$std_id}'";
}
$result = $mysqli->query($query) or die($mysqli->error.__LINE__);
if($result==TRUE){
$rows = array();
while ($row = mysqli_fetch_array($result, MYSQLI_NUM)) {
array_push($rows, $row[0]);
array_push($rows, $row[1]);
}
$str = implode (",", $rows);
echo $str;
}
$result->free();
// CLOSE CONNECTION
$mysqli->close();
exit(0);
return;
}
if ($queryType == 'MakeStudent') {
$std_first_name = @$_POST['FirstName'];
$std_last_name = @$_POST['LastName'];
$std_email = @$_POST['Email'];
$std_phone = @$_POST['Phone'];
$query = "INSERT INTO hackdukedatabase.student (FirstName, LastName, Email, PhoneNumber) VALUES ('{$std_first_name}', '{$std_last_name}', '{$std_email}', '{$std_phone}')";
$result = $mysqli->query($query) or die($mysqli->error.__LINE__);
if($result==TRUE){
echo 'True';
$result->free();
// CLOSE CONNECTION
$mysqli->close();
exit(0);
return;
}
$result->free();
// CLOSE CONNECTION
$mysqli->close();
exit(0);
return;
}
// SetStudents: takes in comma separated list of student ids and updates student list for given class id
if ($queryType == 'SetStudents') {
$class_id = @$_POST['ClassId'];
$std_list = @$_POST['List'];
$query = "UPDATE hackdukedatabase.class SET class.StudentIds='{$std_list}' WHERE ClassId='{$class_id}'";
$result = $mysqli->query($query) or die($mysqli->error.__LINE__);
if($result==TRUE){
echo 'True';
}
$result->free();
// CLOSE CONNECTION
$mysqli->close();
exit(0);
return;
}
// SetClasses: takes in comma separated list of class ids and reconciles classes in class table with list
if ($queryType == 'SetClass') {
$class_id = @$_POST['ClassId'];
$teacher_name = @$_POST['TeacherName'];
$teacher_email = @$_POST['TeacherEmail'];
$teacher_password= @$_POST['TeacherPassword'];
$query = "UPDATE hackdukedatabase.class SET TeacherName='{$teacher_name}', TeacherEmail='{$teacher_email}', TeacherPassword='{$teacher_password}' WHERE ClassId='{$class_id}'";
$result = $mysqli->query($query) or die($mysqli->error.__LINE__);
if($result==TRUE){
echo 'True';
$result->free();
// CLOSE CONNECTION
$mysqli->close();
exit(0);
return;
}
$result->free();
// CLOSE CONNECTION
$mysqli->close();
exit(0);
return;
}
// MakeClass creates a class
if ($queryType == 'MakeClass') {
$class_id = @$_POST['ClassId'];
$teacher_name = @$_POST['TeacherName'];
$teacher_email = @$_POST['TeacherEmail'];
$teacher_password= @$_POST['TeacherPassword'];
$query = "INSERT INTO hackdukedatabase.class (TeacherName, TeacherEmail, TeacherPassword) VALUES ('{$teacher_name}', '{$teacher_email}', '{$teacher_password}')";
$result = $mysqli->query($query) or die($mysqli->error.__LINE__);
if($result==TRUE){
echo 'True';
$result->free();
// CLOSE CONNECTION
$mysqli->close();
exit(0);
return;
}
$result->free();
// CLOSE CONNECTION
$mysqli->close();
exit(0);
return;
}
?>