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<?php
// for logout
if (isset($_GET['logout']) && $_GET['logout'] === 'true') {
setcookie('username','', time() - 3600);
setcookie('passwd','', time() - 3600);
session_start();
session_unset();
session_destroy();
header('location: login.php');
exit();
}
session_start();
if (!isset($_SESSION['username']) || !isset($_SESSION['userID'])) {
header('Location: login.php');
exit();
}
if ($_SERVER['REQUEST_METHOD'] == 'POST') {
if(isset($_POST['update_sidebar'])) {
$client_time = $_POST['update_sidebar'];
$conn = sqlsrv_connect('LAPTOP-DJ46JC9S', array( "Database"=>"voodle", "UID"=>"voodle", "PWD"=>"KanekiK" ));
if ($conn === false) {
echo json_encode(array('message' => "Server not Reachable"));
exit();
}
$sql = "SELECT session_name, session_id, start_time, end_time FROM sessions_ INNER JOIN instructors ON sessions_.userID = instructors.userID WHERE sessions_.userID = ?";
$stmt = sqlsrv_query($conn, $sql, array($_SESSION['userID']));
if ($stmt === false) {
echo json_encode(array('message' => "Server Error"));
exit();
}
$answer = array();
while( $row = sqlsrv_fetch_array( $stmt) ) {
array_push($answer, array('name' => $row['session_name'], 'unique_identifier' => $row['session_id'], 'start' => $row['start_time']->format('Y-m-d H:i:s'), 'end' => $row['end_time']->format('Y-m-d H:i:s')));
}
echo json_encode(array('sessions' => $answer, 'now' => time()));
exit();
}
if (isset($_POST['update_charts'])) {
$conn = sqlsrv_connect('LAPTOP-DJ46JC9S', array( "Database"=>"voodle", "UID"=>"voodle", "PWD"=>"KanekiK" ));
if ($conn === false) {
echo json_encode(array('message' => "Server not Reachable"));
exit();
}
$sql = "SELECT comments, students_crossed FROM questions WHERE session_id = ?";
$stmt = sqlsrv_query($conn, $sql, array($_SESSION['id']));
if ($stmt === false) {
echo '{"message": "Server Error"}';
exit();
}
$chckpt = array();
while( $row = sqlsrv_fetch_array( $stmt) ) {
array_push($chckpt, array('students_checkpoint' => $row['students_crossed'], 'comments' => json_decode($row['comments'])));
}
$sql = "SELECT pings.LDAP, [name], [message], question_no, CONVERT(nvarchar, [time], 8) AS [time] FROM pings INNER JOIN questions ON pings.ques_id = questions.ques_id INNER JOIN students ON students.LDAP = pings.LDAP WHERE questions.session_id = ? AND pings.LDAP != 1";
$stmt = sqlsrv_query($conn, $sql, array($_SESSION['id']));
if ($stmt === false) {
echo '{"message": "Server Error"}';
exit();
}
$pings = array();
while( $row = sqlsrv_fetch_array( $stmt) ) {
array_push($pings, $row);
}
$sql = "SELECT COUNT(*) FROM students WHERE [session] = ?";
$stmt = sqlsrv_query($conn, $sql, array($_SESSION['id']));
if ($stmt === false) {
echo '{"message": "Server Error"}';
exit();
}
$students = 0;
if ( $row = sqlsrv_fetch_array( $stmt) ) {
$students = $row[0];
}
$sql = "SELECT session_name FROM sessions_ WHERE session_id = ?";
$stmt = sqlsrv_query($conn, $sql, array($_SESSION['id']));
if ($stmt === false) {
echo '{"message": "Server Error"}';
exit();
}
$name;
if ( $row = sqlsrv_fetch_array( $stmt) ) {
$name = $row[0];
}
echo json_encode(array('name' => $name, 'online' => $students, 'checkpoint_comments' => $chckpt, 'pings' => $pings));
exit();
}
}
$_SESSION['id'] = $_GET['identifier'];
?>
<!doctype html>
<html>
<head>
<meta charset="utf-8" />
<title>Voodle</title>
<meta name="viewport" content="width=device-width, initial-scale=1">
<!-- using jquery for easy scripting -->
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<!-- using font awesome for icons -->
<link rel="stylesheet" href="./assets/fontawesome/css/all.min.css">
<link href="https://fonts.googleapis.com/css?family=Cinzel+Decorative|Josefin+Slab:400,700|Quicksand:400,700" rel="stylesheet">
<link rel="stylesheet" type="text/css" media="screen" href="results.css" />
<script src='./assets/chart_module/chart.js/dist/Chart.js'></script>
<script src="results.js"></script>
</head>
<body>
<input id='sidebar-toggle-checkbox' type='checkbox' style='display: none'>
<div id="topnav" class='clearfix'>
<label for='sidebar-toggle-checkbox'><h3 id='sidebar-toggle' style='color: white; float: left; margin: 0 25px; cursor: pointer; line-height: 48px'><i class="fas fa-bars"></i></h3></label>
<div id='logo' onclick='window.location.assign("./dashboard.php")' style="cursor: pointer; background-color: rgba(0,0,0,0); color: white; float: left; padding: 0 16px; font-family: 'Cinzel Decorative'; user-select: none;">
Voodle
</div>
<div id='_' style='float: right; color: white; position: relative;'>
<a id='logout' href="<?php echo $_SERVER['PHP_SELF'] .'?logout=true'?>" style='float: left; color: white; text-decoration: none; text-align: center; padding: 0 4px;'><i style='padding: 0 16px' class="fas fa-sign-out-alt"></i>Logout</a>
</div>
</div>
<div style='display: flex; position: absolute; width: 100%; flex-direction: row; height: calc(100% - 48px); overflow: hidden'>
<div id='right-side-bar'>
<span style='color: white; text-align: center; display: block; cursor: default; padding: 12px 4px;'><i style='padding: 0 16px' class='fas fa-user'></i><?php echo $_SESSION['username']?></span>
<ul id='sessions_list' class='expand-dropdown'><span><i class="fas fa-angle-down"></i>Your Sessions</span>
</ul>
</div>
<!-- For updating sidebar every 2 seconds -->
<script>
async function update_sidebar () {
if ($('#sessions_list > span > i').hasClass('fa-angle-right')) return;
if ($('#sidebar-toggle-checkbox').prop('checked')) return;
var xhttp = new XMLHttpRequest();
xhttp.onreadystatechange = function() {
if (this.readyState == 4 && this.status == 200) {
var response = JSON.parse(this.responseText);
$('#sessions_list li').remove();
if ('message' in response)
$('#sessions_list').append('<li style="text-align: center; padding-left: 0; color: #ef9a9a">' + response['message'] + '</li>');
else {
var sessions = response['sessions'];
if (sessions.length === 0) {
$('#sessions_list').append('<li onclick="window.location.assign(\'./dashboard.php\')"><i class="fas fa-plus" style="margin: 0 8px 0 0"></i>Create a session</li>');
}
else for(var i = 0; i < sessions.length; i++) {
if ((new Date(sessions[i]['start']) <= new Date(response['now']*1000)) && (new Date(response['now']*1000) <= new Date(new Date(sessions[i]['end'])))) {
$('#sessions_list').append('<li identifier="'+sessions[i]['unique_identifier']+'"><span style="display: inline-block; overflow: hidden; max-width: calc(100% - 2em); white-space: nowrap; text-overflow: ellipsis">'+sessions[i]['name']+'</span><i class="fas fa-feather-alt clearfix" style="float: right;"></i></li>');
$('#sessions_list li:nth-child('+(i+2)+')').on('click', function() {
window.location.assign('/results.php?identifier='+escape($(this).attr('identifier')));
});
}
else {
$('#sessions_list').append('<li identifier="'+sessions[i]['unique_identifier']+'" style="overflow: hidden; text-overflow: ellipsis; white-space: nowrap; padding-right: 0.5em">'+sessions[i]['name']+'</li>');
$('#sessions_list li:nth-child('+(i+2)+')').on('click', function() {
window.location.assign('/results.php?identifier='+escape($(this).attr('identifier')));
});
}
}
}
}
};
xhttp.open("POST", "<?php echo $_SERVER['PHP_SELF']?>" , true);
xhttp.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
xhttp.send("update_sidebar");
}
update_sidebar();
setInterval(update_sidebar, 2000);
</script>
<div id='site'>
<div id="modal">
<div id="modal-content">
<span id="close">×</span>
<ul></ul>
<div style='display: flex; flex-direction: row'>
<textarea placeholder="Reply here"></textarea><i class='fa fa-paper-plane' onclick='post_ping($(this))'></i>
</div>
</div>
</div>
<div style='font-size: x-large; display: flex; flex-direction: row; justify-content: space-between'>
<span id='s_name'></span>
<div style='color: #8bc34a; background-color: #000; border-radius: 8px; padding: 8px 16px'>
<span>Number of Students online:</span>
<span id='students_online'></span>
<i class='fas fa-feather-alt'></i>
</div>
</div>
<div class="chart-container" style="position: relative">
<canvas id="hist"></canvas>
</div>
<div id='comments' style='display: flex'></div>
<div class="chart-container" style="position: relative">
<canvas id="pinghist"></canvas>
</div>
<div id='ping-messages' style='display: flex'></div>
<script>
// When the user clicks on <span> (x), close the modal
$('#close').on('click', function() {
$('#modal').css('display', 'none');
clearInterval(refresh);
refresh = setInterval(data_update, 1000);
data_update();
});
// When the user clicks anywhere outside of the modal, close it
$('#modal').on('click', function(event) {
if (event.target == this) {
$(this).css('display', 'none');
clearInterval(refresh);
refresh = setInterval(data_update, 1000);
data_update();
}
});
</script>
<script>
var myChart = new Chart($('#hist'), {
type: 'bar',
data: {
labels: [],
datasets: [{
label: 'Number of Students Crossed',
data: [],
backgroundColor: [
'rgba(255, 99, 132, 0.2)',
'rgba(54, 162, 235, 0.2)',
'rgba(255, 206, 86, 0.2)',
'rgba(75, 192, 192, 0.2)',
'rgba(153, 102, 255, 0.2)',
'rgba(255, 159, 64, 0.2)'
],
borderColor: [
'rgba(255,99,132,1)',
'rgba(54, 162, 235, 1)',
'rgba(255, 206, 86, 1)',
'rgba(75, 192, 192, 1)',
'rgba(153, 102, 255, 1)',
'rgba(255, 159, 64, 1)'
],
borderWidth: 1
}]
},
options: {
scales: {
yAxes: [{
ticks: {
beginAtZero:true,
callback: function(value) {if (value % 1 === 0) {return value;}}
}
}],
xAxes: [{
categoryPercentage: 1.0,
barPercentage: 1.0
}]
},
tooltips: {
intersect: false,
mode: 'index'
}
}
});
var mypingChart = new Chart($('#pinghist'), {
type: 'bar',
data: {
labels: [],
datasets: [{
label: 'Number of Students Pinged',
data: [],
backgroundColor: [
'rgba(255, 99, 132, 0.2)',
'rgba(54, 162, 235, 0.2)',
'rgba(255, 206, 86, 0.2)',
'rgba(75, 192, 192, 0.2)',
'rgba(153, 102, 255, 0.2)',
'rgba(255, 159, 64, 0.2)'
],
borderColor: [
'rgba(255,99,132,1)',
'rgba(54, 162, 235, 1)',
'rgba(255, 206, 86, 1)',
'rgba(75, 192, 192, 1)',
'rgba(153, 102, 255, 1)',
'rgba(255, 159, 64, 1)'
],
borderWidth: 1
}]
},
options: {
scales: {
yAxes: [{
ticks: {
beginAtZero:true,
callback: function(value) {if (value % 1 === 0) {return value;}}
}
}],
xAxes: [{
categoryPercentage: 1.0,
barPercentage: 1.0
}]
},
tooltips: {
intersect: false,
mode: 'index'
}
}
});
$.ajax({
type: 'POST',
url: <?php echo "'".$_SERVER['PHP_SELF']."'";?>,
data: 'update_charts',
success: function(msg) {
var response = JSON.parse(msg);
if ('message' in response)
console.log(response['message']);
else {
var len = response.checkpoint_comments.length;
$('#students_online').html(response['online']);
$('#s_name').html(response['name']);
var labels = [];
for(var i = 0; i < len; i++) {
labels.push("Ques "+(i+1));
}
myChart.data.labels = labels;
mypingChart.data.labels = labels;
for (var i = 0; i < len; i++) {
$('#comments').append('<div><button onclick="$(this).next().toggle()">Comments on Question '+(i+1)+'</button><div><ul ques="'+i+'" style="display: flex"></ul><div style="display: flex; flex-direction: row"><textarea style="flex-grow: 1" placeholder="Comment here"></textarea><i class="fa fa-paper-plane" onclick="post_comment($(this))" aria-hidden="true"></i></div></div></div>');
}
for( var i = 0;i<len ; i++) {
$('#ping-messages').append('<div><button onclick="$(this).next().toggle()">Pings on Question '+(i+1)+'</button><div><ul ques="'+i+'" style="display: flex"></ul><div style="display: flex; flex-direction: row"></div></div></div>');
}
}
}
});
function data_update() {
$.ajax({
type: 'POST',
url: <?php echo "'".$_SERVER['PHP_SELF']."'";?>,
data: 'update_charts',
success: function(msg) {
var response = JSON.parse(msg);
if ('message' in response)
console.log(response['message']);
else {
var len = response.checkpoint_comments.length;
$('#students_online').html(response['online']);
var data = [];
var pingdata = [];
for(var i = 0; i < len; i++) {
data.push(response.checkpoint_comments[i].students_checkpoint);
pingdata.push(0);
}
for(var i = 0;i < response.pings.length; i++) {
pingdata[response.pings[i].question_no - 1] += 1;
}
myChart.data.datasets[0].data = data;
mypingChart.data.datasets[0].data = pingdata;
mypingChart.update();
myChart.update();
for(var i = 0; i < len; i++) {
var comments = response.checkpoint_comments[i].comments;
$('#comments ul[ques='+i+']').empty();
for(var j = comments.length - 1; j >= 0; j--) {
if (comments[j]['ldap'] == 1)
$('#comments ul[ques='+i+']').append('<li class="instructor"><div class="c_header"><span class="c_ldap">'+"You"+'</span><span class="c_time">'+comments[j]['time']+'</span></div><span class="c_comment">'+comments[j]['comment']+'</span></li>');
else
$('#comments ul[ques='+i+']').append('<li><div class="c_header"><span class="c_ldap">'+comments[j]['ldap']+'</span><span class="c_time">'+comments[j]['time']+'</span></div><span class="c_comment">'+comments[j]['comment']+'</span></li>');
}
}
for(var i=0; i<len; i++){
$('#ping-messages ul[ques='+i+']').empty();
}
for(var i = response.pings.length - 1; i >= 0; i--){
var ping = response.pings[i];
var question_no = response.pings[i].question_no-1;
$('#ping-messages ul[ques='+question_no+']').append('<li title="Reply to '+ping['LDAP']+'"><div class="c_header"><span class="c_ldap">'+ping['LDAP']+'</span><span class="c_time">'+ping['time']+'</span></div><span class="c_comment">'+ping['message']+'</span></li>');
// Get the modal
var modal = $('#modal');
// Get the <span> element that closes the modal
var span = $('#close');
var btn = $('#ping-messages ul > li');
btn.on('click', function() {
var who = $(this).children().children().html();
var ques = $(this).parent().attr('ques');
if (who == 'You') {
return;
}
console.log($(this).html());
modal.attr('ques', ques);
modal.attr('who', who);
modal.css('display', 'block');
clearInterval(refresh);
refresh = setInterval(function () {fetch_pings(ques, who);}, 1000);
fetch_pings(ques, who);
})
}
}
}
});
};
var refresh = setInterval(data_update, 1000);
data_update();
function post_comment(post_icon) {
var textarea = post_icon.prev();
if (textarea.val())
$.ajax({
type: 'POST',
url: './student_interface.php',
data: {'who': JSON.stringify([<?php echo $_SESSION['id']; ?>, parseInt(textarea.parent().prev().attr('ques')) + 1]), 'comment': JSON.stringify({'ldap': 1, 'comment': textarea.val()})},
success: function(msg) {
textarea.val('');
}
})
}
function post_ping(post_icon) {
var textarea = post_icon.prev();
if (textarea.val())
$.ajax({
type: 'POST',
url: './student_interface.php',
data: {'who': JSON.stringify([<?php echo $_SESSION['id']; ?>, parseInt($('#modal').attr('ques')) + 1]), 'ping': JSON.stringify({'ldap': 1, 'comment': textarea.val()}), 'to': $('#modal').attr('who')},
success: function(msg) {
console.log(msg);
textarea.val('');
}
})
}
function fetch_pings(ques_no, ldap) {
$.ajax({
type: 'POST',
url: './student_interface.php',
data: {'who': JSON.stringify([<?php echo $_SESSION['id']; ?>, parseInt($('#modal').attr('ques')) + 1]), 'ldap': ldap},
success: function(msg) {
var response = JSON.parse(msg);
$('#modal ul').empty();
for(var i = response.length - 1; i >= 0; i--) {
if (response[i]['LDAP'] == 1)
$('#modal ul').append('<li class="instructor"><div class="c_header"><span class="c_time">'+response[i]['time']+'</span></div><span class="c_comment">'+response[i]['message']+'</span></li>');
else
$('#modal ul').append('<li><div class="c_header"><span class="c_time">'+response[i]['time']+'</span></div><span class="c_comment">'+response[i]['message']+'</span></li>');
}
}
})
}
</script>
</div>
</div>
</body>
</html>