181 lines
7.2 KiB
PHP
181 lines
7.2 KiB
PHP
<?php
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session_start();
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require_once 'db/config.php';
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if (!isset($_SESSION['user_id'])) {
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header('Location: login.php');
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exit();
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}
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$user_id = $_SESSION['user_id'];
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$role = $_SESSION['role'];
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if ($role !== 'teacher') {
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header('Location: ' . $role . '_dashboard.php');
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exit();
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}
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if (!isset($_GET['exam_id'])) {
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header('Location: exams.php');
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exit();
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}
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$exam_id = $_GET['exam_id'];
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$pdo = db();
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// Verify the teacher owns the exam
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$stmt = $pdo->prepare('SELECT * FROM exams WHERE id = ? AND created_by = ?');
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$stmt->execute([$exam_id, $user_id]);
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$exam = $stmt->fetch();
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if (!$exam) {
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echo "Exam not found or you don't have permission to edit it.";
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exit();
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}
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// Handle question form submission
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if ($_SERVER['REQUEST_METHOD'] === 'POST' && isset($_POST['question_text'])) {
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$question_text = trim($_POST['question_text']);
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$question_type = $_POST['question_type'];
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$options = null;
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if ($question_type === 'multiple_choice') {
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$options_raw = trim($_POST['options']);
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if (!empty($options_raw)) {
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$options = json_encode(array_map('trim', explode("\n", $options_raw)));
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}
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}
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if (!empty($question_text)) {
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if (isset($_POST['question_id']) && !empty($_POST['question_id'])) {
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// Update question
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$stmt = $pdo->prepare('UPDATE exam_questions SET question_text = ?, question_type = ?, options = ? WHERE id = ? AND exam_id = ?');
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$stmt->execute([$question_text, $question_type, $options, $_POST['question_id'], $exam_id]);
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} else {
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// Add new question
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$stmt = $pdo->prepare('INSERT INTO exam_questions (exam_id, question_text, question_type, options) VALUES (?, ?, ?, ?)');
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$stmt->execute([$exam_id, $question_text, $question_type, $options]);
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}
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}
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header('Location: exam_questions.php?exam_id=' . $exam_id);
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exit();
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}
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// Handle question deletion
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if (isset($_GET['delete_question'])) {
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$question_id = $_GET['delete_question'];
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$stmt = $pdo->prepare('DELETE FROM exam_questions WHERE id = ? AND exam_id = ?');
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$stmt->execute([$question_id, $exam_id]);
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header('Location: exam_questions.php?exam_id=' . $exam_id);
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exit();
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}
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// Fetch questions for the exam
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$stmt = $pdo->prepare('SELECT * FROM exam_questions WHERE exam_id = ? ORDER BY created_at ASC');
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$stmt->execute([$exam_id]);
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$questions = $stmt->fetchAll();
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// Check if we are editing a question
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$edit_question = null;
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if (isset($_GET['edit_question'])) {
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$stmt = $pdo->prepare('SELECT * FROM exam_questions WHERE id = ? AND exam_id = ?');
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$stmt->execute([$_GET['edit_question'], $exam_id]);
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$edit_question = $stmt->fetch();
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}
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?>
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<!DOCTYPE html>
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<html lang="en">
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<head>
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<meta charset="UTF-8">
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<meta name="viewport" content="width=device-width, initial-scale=1.0">
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<title>Manage Questions for <?php echo htmlspecialchars($exam['name']); ?></title>
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<link rel="stylesheet" href="assets/css/custom.css?v=<?php echo time(); ?>">
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</head>
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<body>
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<header>
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<h1>Manage Questions for "<?php echo htmlspecialchars($exam['name']); ?>"</h1>
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<nav>
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<ul>
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<li><a href="exams.php">Back to Exams</a></li>
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<li><a href="teacher_dashboard.php">Dashboard</a></li>
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<li><a href="logout.php">Logout</a></li>
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</ul>
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</nav>
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</header>
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<main>
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<section>
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<h2><?php echo $edit_question ? 'Edit' : 'Add'; ?> Question</h2>
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<form action="exam_questions.php?exam_id=<?php echo $exam_id; ?>" method="POST">
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<?php if ($edit_question): ?>
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<input type="hidden" name="question_id" value="<?php echo htmlspecialchars($edit_question['id']); ?>">
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<?php endif; ?>
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<div>
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<label for="question_text">Question:</label>
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<textarea id="question_text" name="question_text" rows="3" required><?php echo $edit_question ? htmlspecialchars($edit_question['question_text']) : ''; ?></textarea>
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</div>
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<div>
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<label for="question_type">Question Type:</label>
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<select id="question_type" name="question_type">
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<option value="free_text" <?php echo ($edit_question && $edit_question['question_type'] === 'free_text') ? 'selected' : ''; ?>>Free Text</option>
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<option value="multiple_choice" <?php echo ($edit_question && $edit_question['question_type'] === 'multiple_choice') ? 'selected' : ''; ?>>Multiple Choice</option>
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</select>
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</div>
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<div id="mc_options_container">
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<label for="options">Options (one per line):</label>
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<textarea id="options" name="options" rows="5"><?php echo ($edit_question && $edit_question['options']) ? htmlspecialchars(implode("\n", json_decode($edit_question['options']))) : ''; ?></textarea>
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</div>
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<button type="submit"><?php echo $edit_question ? 'Update' : 'Add'; ?> Question</button>
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<?php if ($edit_question): ?>
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<a href="exam_questions.php?exam_id=<?php echo $exam_id; ?>">Cancel Edit</a>
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<?php endif; ?>
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</form>
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</section>
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<section>
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<h2>Questions</h2>
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<table>
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<thead>
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<tr>
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<th>Question</th>
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<th>Type</th>
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<th>Actions</th>
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</tr>
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</thead>
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<tbody>
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<?php foreach ($questions as $question):
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?>
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<tr>
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<td><?php echo nl2br(htmlspecialchars($question['question_text'])); ?></td>
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<td><?php echo htmlspecialchars(str_replace('_', ' ', $question['question_type'])); ?></td>
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<td>
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<a href="exam_questions.php?exam_id=<?php echo $exam_id; ?>&edit_question=<?php echo $question['id']; ?>">Edit</a> |
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<a href="exam_questions.php?exam_id=<?php echo $exam_id; ?>&delete_question=<?php echo $question['id']; ?>" onclick="return confirm('Are you sure you want to delete this question?');">Delete</a>
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</td>
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</tr>
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<?php endforeach; ?>
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<?php if (empty($questions)):
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?>
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<tr>
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<td colspan="3">No questions have been added to this exam yet.</td>
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</tr>
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<?php endif; ?>
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</tbody>
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</table>
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</section>
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</main>
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<script>
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// Show/hide multiple choice options based on question type selection
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const questionType = document.getElementById('question_type');
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const mcOptionsContainer = document.getElementById('mc_options_container');
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function toggleMcOptions() {
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mcOptionsContainer.style.display = questionType.value === 'multiple_choice' ? 'block' : 'none';
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}
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toggleMcOptions(); // Initial check
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questionType.addEventListener('change', toggleMcOptions);
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</script>
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</body>
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</html>
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