<?php
// Add timezone conversion functions at the top of the file
function get_user_timezone() {
// Default to IST (Indian Standard Time)
return 'Asia/Kolkata';
}
function convert_to_user_timezone($datetime_str, $format = 'Y-m-d H:i:s') {
// This is a simplified version that just returns the time in IST format
// since we're defaulting to IST timezone
return date($format, strtotime($datetime_str));
}
$pageTitle = "Exam Details";
include_once('includes/header.php');
require_once('../includes/functions.php');
// Check if exam ID is provided
if (!isset($_GET['id']) || empty($_GET['id'])) {
$_SESSION['error_message'] = "No exam ID provided.";
header("Location: scheduled-exams.php");
exit();
}
$exam_id = intval($_GET['id']);
$student_id = $_SESSION['user_id'];
// Get current date
$current_date = date('Y-m-d');
// Get exam details
$exam_query = "
SELECT es.*, c.title as course_title, c.image as course_image, c.description as course_description,
CONCAT(i.first_name, ' ', i.last_name) as instructor_name, i.profile_image as instructor_image,
(SELECT COUNT(*) FROM student_exams se WHERE se.user_id = ? AND se.exam_id = es.id) as attempt_count,
(SELECT COUNT(*) FROM exam_questions eq WHERE eq.exam_id = es.id) as question_count
FROM exam_schedules es
JOIN courses c ON es.course_id = c.id
LEFT JOIN users i ON c.instructor_id = i.id
JOIN enrollments e ON e.course_id = c.id AND e.user_id = ?
WHERE es.id = ? AND e.status = 'completed'
";
$stmt = $conn->prepare($exam_query);
$stmt->bind_param("iii", $student_id, $student_id, $exam_id);
$stmt->execute();
$result = $stmt->get_result();
// Check if exam exists and is accessible to this student
if ($result->num_rows == 0) {
$_SESSION['error_message'] = "Exam not found or not accessible.";
header("Location: scheduled-exams.php");
exit();
}
$exam = $result->fetch_assoc();
// Get previous attempts
$attempts_query = "
SELECT se.*, DATE_FORMAT(se.attempt_date, '%d %b %Y, %h:%i %p') as formatted_date
FROM student_exams se
WHERE se.user_id = ? AND se.exam_id = ?
ORDER BY se.attempt_date DESC
";
$stmt = $conn->prepare($attempts_query);
$stmt->bind_param("ii", $student_id, $exam_id);
$stmt->execute();
$attempts = $stmt->get_result();
// Calculate exam time status
$exam_datetime = $exam['exam_date'] . ' ' . $exam['start_time'];
$end_datetime = date('Y-m-d H:i:s', strtotime($exam['exam_date'] . ' ' . $exam['end_time']));
$current_datetime = date('Y-m-d H:i:s');
// For display purposes, we'll use the user's timezone
$user_exam_datetime = convert_to_user_timezone($exam_datetime, 'Y-m-d H:i:s');
$user_end_datetime = convert_to_user_timezone($end_datetime, 'Y-m-d H:i:s');
$time_status = 'upcoming';
$can_take_exam = false;
$time_message = '';
// The business logic should still use server time (IST) for determining status
if ($current_datetime < $exam_datetime) {
$time_status = 'upcoming';
$time_message = 'Exam has not started yet';
} else if ($current_datetime <= $end_datetime) {
$time_status = 'in_progress';
$can_take_exam = true;
$time_message = 'Exam is currently in progress';
} else {
$time_status = 'ended';
$time_message = 'Exam has ended';
// Check if late attempts are allowed
if ($exam['allow_late_attempts']) {
$can_take_exam = true;
$time_message .= ', but late attempts are allowed';
}
}
// Check attempt limits
if ($exam['attempt_count'] >= $exam['attempts_allowed'] && $exam['attempts_allowed'] > 0) {
$can_take_exam = false;
$time_message = 'Maximum attempts reached (' . $exam['attempt_count'] . '/' . $exam['attempts_allowed'] . ')';
}
?>
<div class="container py-4">
<div class="d-flex justify-content-between align-items-center mb-4">
<h2>Exam Details</h2>
<a href="scheduled-exams.php" class="btn btn-outline-primary">
<i class="fas fa-arrow-left me-2"></i>Back to Exams
</a>
</div>
<?php if (isset($_SESSION['success_message'])): ?>
<div class="alert alert-success alert-dismissible fade show" role="alert">
<i class="fas fa-check-circle me-2"></i> <?php echo $_SESSION['success_message']; ?>
<button type="button" class="btn-close" data-bs-dismiss="alert" aria-label="Close"></button>
</div>
<?php unset($_SESSION['success_message']); endif; ?>
<?php if (isset($_SESSION['error_message'])): ?>
<div class="alert alert-danger alert-dismissible fade show" role="alert">
<i class="fas fa-exclamation-circle me-2"></i> <?php echo $_SESSION['error_message']; ?>
<button type="button" class="btn-close" data-bs-dismiss="alert" aria-label="Close"></button>
</div>
<?php unset($_SESSION['error_message']); endif; ?>
<!-- Exam Details -->
<div class="card mb-4">
<div class="card-header bg-primary text-white">
<h5 class="mb-0"><i class="fas fa-clipboard-list me-2"></i><?php echo htmlspecialchars($exam['title']); ?></h5>
</div>
<div class="card-body">
<div class="row">
<div class="col-md-8">
<div class="mb-4">
<h4>About This Exam</h4>
<p><?php echo htmlspecialchars($exam['description'] ?? 'No description available.'); ?></p>
</div>
<div class="mb-4">
<h5>Exam Details</h5>
<div class="row">
<div class="col-md-6">
<ul class="list-group list-group-flush">
<li class="list-group-item d-flex justify-content-between">
<span><i class="fas fa-calendar-day me-2"></i>Date:</span>
<span class="fw-bold"><?php echo date('d M Y', strtotime($exam['exam_date'])); ?></span>
</li>
<li class="list-group-item d-flex justify-content-between">
<span><i class="fas fa-clock me-2"></i>Time:</span>
<span class="fw-bold">
<?php
// Show both IST and user local time
$ist_start = date('h:i A', strtotime($exam['start_time']));
$ist_end = date('h:i A', strtotime($exam['end_time']));
// Convert to user timezone
$user_start = convert_to_user_timezone($exam['exam_date'] . ' ' . $exam['start_time'], 'h:i A');
$user_end = convert_to_user_timezone($exam['exam_date'] . ' ' . $exam['end_time'], 'h:i A');
$user_tz = get_user_timezone();
echo "$ist_start - $ist_end (IST)";
if ($user_tz != 'Asia/Kolkata') {
echo "<br>" . $user_start . " - " . $user_end . " (Your local time)";
}
?>
</span>
</li>
<li class="list-group-item d-flex justify-content-between">
<span><i class="fas fa-hourglass-half me-2"></i>Duration:</span>
<span class="fw-bold"><?php echo $exam['duration_minutes']; ?> minutes</span>
</li>
</ul>
</div>
<div class="col-md-6">
<ul class="list-group list-group-flush">
<li class="list-group-item d-flex justify-content-between">
<span><i class="fas fa-question-circle me-2"></i>Questions:</span>
<span class="fw-bold"><?php echo $exam['question_count']; ?></span>
</li>
<li class="list-group-item d-flex justify-content-between">
<span><i class="fas fa-percentage me-2"></i>Pass Percentage:</span>
<span class="fw-bold"><?php echo $exam['passing_percentage']; ?>%</span>
</li>
<li class="list-group-item d-flex justify-content-between">
<span><i class="fas fa-redo me-2"></i>Attempts Allowed:</span>
<span class="fw-bold"><?php echo $exam['attempts_allowed'] ? $exam['attempts_allowed'] : 'Unlimited'; ?></span>
</li>
</ul>
</div>
</div>
</div>
<!-- Attempts History -->
<?php if ($attempts->num_rows > 0): ?>
<div class="mb-4">
<h5>Your Previous Attempts</h5>
<div class="table-responsive">
<table class="table table-hover">
<thead class="table-light">
<tr>
<th>#</th>
<th>Date & Time</th>
<th>Score</th>
<th>Status</th>
<th>Action</th>
</tr>
</thead>
<tbody>
<?php $attempt_number = 1; while ($attempt = $attempts->fetch_assoc()): ?>
<tr>
<td><?php echo $attempt_number++; ?></td>
<td><?php echo $attempt['formatted_date']; ?></td>
<td><?php echo $attempt['percentage']; ?>%</td>
<td>
<?php if ($attempt['status'] == 'passed'): ?>
<span class="badge bg-success">Passed</span>
<?php elseif ($attempt['status'] == 'failed'): ?>
<span class="badge bg-danger">Failed</span>
<?php else: ?>
<span class="badge bg-secondary"><?php echo ucfirst($attempt['status']); ?></span>
<?php endif; ?>
</td>
<td>
<a href="exam-results.php?id=<?php echo $exam_id; ?>" class="btn btn-sm btn-primary">
<i class="fas fa-eye me-1"></i> View Results
</a>
</td>
</tr>
<?php endwhile; ?>
</tbody>
</table>
</div>
</div>
<?php endif; ?>
</div>
<div class="col-md-4">
<div class="card mb-3">
<div class="card-header bg-light">
<h5 class="mb-0">Course Information</h5>
</div>
<div class="card-body">
<div class="text-center mb-3">
<?php if (!empty($exam['course_image'])): ?>
<img src="../<?php echo htmlspecialchars($exam['course_image']); ?>" alt="Course Image" class="img-fluid rounded mb-2" style="max-height: 150px;">
<?php else: ?>
<div class="bg-light rounded d-flex align-items-center justify-content-center mb-2" style="height: 150px;">
<i class="fas fa-book fa-4x text-primary"></i>
</div>
<?php endif; ?>
<h6><?php echo htmlspecialchars($exam['course_title']); ?></h6>
</div>
<div class="d-flex align-items-center mb-3">
<?php if (!empty($exam['instructor_image'])): ?>
<img src="../<?php echo htmlspecialchars($exam['instructor_image']); ?>" alt="Instructor" class="rounded-circle me-2" style="width: 40px; height: 40px; object-fit: cover;">
<?php else: ?>
<div class="bg-light rounded-circle d-flex align-items-center justify-content-center me-2" style="width: 40px; height: 40px;">
<i class="fas fa-user text-primary"></i>
</div>
<?php endif; ?>
<div>
<p class="mb-0 small">Instructor</p>
<p class="mb-0 fw-bold"><?php echo htmlspecialchars($exam['instructor_name']); ?></p>
</div>
</div>
</div>
</div>
<div class="card">
<div class="card-header <?php echo $time_status == 'in_progress' ? 'bg-success' : ($time_status == 'upcoming' ? 'bg-warning' : 'bg-secondary'); ?> text-white">
<h5 class="mb-0">
<?php echo $time_status == 'in_progress' ? 'Exam In Progress' : ($time_status == 'upcoming' ? 'Upcoming Exam' : 'Exam Ended'); ?>
</h5>
</div>
<div class="card-body">
<p class="mb-3"><?php echo $time_message; ?></p>
<div class="d-grid gap-2">
<?php if ($can_take_exam): ?>
<a href="take_exam.php?id=<?php echo $exam_id; ?>" class="btn btn-primary">
<i class="fas fa-edit me-1"></i> Start Exam
</a>
<?php else: ?>
<button class="btn btn-secondary" disabled>
<i class="fas fa-edit me-1"></i> Start Exam
</button>
<?php endif; ?>
<?php if ($attempts->num_rows > 0): ?>
<a href="exam-results.php?id=<?php echo $exam_id; ?>" class="btn btn-outline-primary">
<i class="fas fa-chart-bar me-1"></i> View Results
</a>
<?php endif; ?>
</div>
</div>
<?php if ($time_status == 'upcoming'): ?>
<div class="card-footer bg-light">
<div class="small">
<p class="mb-1"><strong>Starts in:</strong></p>
<p class="mb-0 text-primary fw-bold" id="countdown">Calculating...</p>
</div>
<script>
// Add countdown timer script
document.addEventListener('DOMContentLoaded', function() {
<?php
// Convert exam datetime to user's timezone
$user_exam_datetime = convert_to_user_timezone($exam_datetime, 'Y-m-d H:i:s');
?>
const examDate = new Date('<?php echo $user_exam_datetime; ?>');
const countdownEl = document.getElementById('countdown');
let hasReloaded = false;
function updateCountdown() {
const now = new Date();
const diff = examDate - now;
if (diff <= 0) {
countdownEl.innerHTML = 'Exam has started!';
// Only reload once when exam starts
if (!hasReloaded) {
hasReloaded = true;
// Use sessionStorage to prevent infinite reloads
if (!sessionStorage.getItem('examStartReloaded_<?php echo $exam_id; ?>')) {
sessionStorage.setItem('examStartReloaded_<?php echo $exam_id; ?>', 'true');
setTimeout(function() {
location.reload();
}, 2000);
}
}
return;
}
const days = Math.floor(diff / (1000 * 60 * 60 * 24));
const hours = Math.floor((diff % (1000 * 60 * 60 * 24)) / (1000 * 60 * 60));
const minutes = Math.floor((diff % (1000 * 60 * 60)) / (1000 * 60));
const seconds = Math.floor((diff % (1000 * 60)) / 1000);
countdownEl.innerHTML = `${days}d ${hours}h ${minutes}m ${seconds}s`;
}
// Clear the reload flag when we're showing countdown again
if (examDate > new Date()) {
sessionStorage.removeItem('examStartReloaded_<?php echo $exam_id; ?>');
}
updateCountdown();
setInterval(updateCountdown, 1000);
});
</script>
</div>
<?php endif; ?>
</div>
</div>
</div>
</div>
</div>
</div>
<?php include_once('includes/footer.php'); ?>
