250 lines
14 KiB
PHP
250 lines
14 KiB
PHP
<?php
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require_once __DIR__ . '/includes/auth_check.php';
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require_once __DIR__ . '/db/config.php';
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$message = '';
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$error = '';
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$editing_subject = null;
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$school_id = $_SESSION['school_id'];
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$pdo = db();
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// Handle Delete request
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if ($_SERVER['REQUEST_METHOD'] === 'POST' && isset($_POST['delete_id'])) {
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try {
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$delete_id = $_POST['delete_id'];
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$stmt = $pdo->prepare("DELETE FROM subjects WHERE id = ? AND school_id = ?");
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$stmt->execute([$delete_id, $school_id]);
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$message = "Subject deleted successfully.";
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} catch (PDOException $e) {
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$error = "Error deleting subject: " . $e->getMessage();
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}
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}
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// Handle POST request to add or update a subject
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if ($_SERVER['REQUEST_METHOD'] === 'POST' && isset($_POST['subject_name'])) {
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$subjectName = trim($_POST['subject_name']);
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$lessons_per_week = filter_input(INPUT_POST, 'lessons_per_week', FILTER_VALIDATE_INT, ['options' => ['default' => 1, 'min_range' => 1]]);
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$has_double_lesson = isset($_POST['has_double_lesson']) ? 1 : 0;
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$is_elective = isset($_POST['is_elective']) ? 1 : 0;
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$elective_group_id = !empty($_POST['elective_group_id']) ? $_POST['elective_group_id'] : null;
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$subject_id = $_POST['subject_id'] ?? null;
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if (empty($subjectName)) {
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$error = 'Subject name cannot be empty.';
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} else {
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// Check for duplicates before inserting/updating
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$stmt = $pdo->prepare("SELECT id FROM subjects WHERE name = ? AND school_id = ? AND id != ?");
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$stmt->execute([$subjectName, $school_id, $subject_id ?? 0]);
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if ($stmt->fetch()) {
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$error = "Error: Subject '" . htmlspecialchars($subjectName) . "' already exists.";
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} else {
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try {
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if ($subject_id) {
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// Update existing subject
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$stmt = $pdo->prepare("UPDATE subjects SET name = ?, lessons_per_week = ?, has_double_lesson = ?, is_elective = ?, elective_group_id = ? WHERE id = ? AND school_id = ?");
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$stmt->execute([$subjectName, $lessons_per_week, $has_double_lesson, $is_elective, $elective_group_id, $subject_id, $school_id]);
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$message = "Subject updated successfully!";
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} else {
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// Insert new subject
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$stmt = $pdo->prepare("INSERT INTO subjects (name, lessons_per_week, has_double_lesson, is_elective, elective_group_id, school_id) VALUES (?, ?, ?, ?, ?, ?)");
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$stmt->execute([$subjectName, $lessons_per_week, $has_double_lesson, $is_elective, $elective_group_id, $school_id]);
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$message = "Subject created successfully!";
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}
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} catch (PDOException $e) {
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$error = 'Database error: ' . $e->getMessage();
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}
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}
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}
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}
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// Handle Edit request
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if (isset($_GET['edit_id'])) {
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try {
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$edit_id = $_GET['edit_id'];
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$stmt = $pdo->prepare("SELECT * FROM subjects WHERE id = ? AND school_id = ?");
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$stmt->execute([$edit_id, $school_id]);
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$editing_subject = $stmt->fetch(PDO::FETCH_ASSOC);
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} catch (PDOException $e) {
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$error = "Error fetching subject: " . $e->getMessage();
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}
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}
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// Fetch all subjects to display
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$subjects = [];
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try {
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$subjects_stmt = $pdo->prepare("SELECT s.*, eg.name as elective_group_name FROM subjects s LEFT JOIN elective_groups eg ON s.elective_group_id = eg.id WHERE s.school_id = ? ORDER BY s.name ASC");
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$subjects_stmt->execute([$school_id]);
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$subjects = $subjects_stmt->fetchAll(PDO::FETCH_ASSOC);
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} catch (PDOException $e) {
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$error = 'Database error: ' . $e->getMessage();
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}
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// Fetch all elective groups for the dropdown
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$elective_groups = [];
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try {
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$stmt = $pdo->prepare("SELECT * FROM elective_groups WHERE school_id = ? ORDER BY name ASC");
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$stmt->execute([$school_id]);
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$elective_groups = $stmt->fetchAll(PDO::FETCH_ASSOC);
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} catch (PDOException $e) {
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$error = 'Database error while fetching elective groups: ' . $e->getMessage();
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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>Admin: Manage Subjects - Haki Schedule</title>
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<link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.2/dist/css/bootstrap.min.css" rel="stylesheet">
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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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<nav class="navbar navbar-expand-lg navbar-light bg-white sticky-top shadow-sm">
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<div class="container">
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<a class="navbar-brand fw-bold" href="/">Haki Schedule</a>
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<button class="navbar-toggler" type="button" data-bs-toggle="collapse" data-bs-target="#navbarNav" aria-controls="navbarNav" aria-expanded="false" aria-label="Toggle navigation">
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<span class="navbar-toggler-icon"></span>
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</button>
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<div class="collapse navbar-collapse" id="navbarNav">
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<ul class="navbar-nav ms-auto">
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<li class="nav-item"><a class="nav-link" href="/">Home</a></li>
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<?php if (isset($_SESSION['user_id'])): ?>
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<li class="nav-item dropdown">
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<a class="nav-link dropdown-toggle active" href="#" id="manageDropdown" role="button" data-bs-toggle="dropdown" aria-expanded="false">
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Manage
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</a>
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<ul class="dropdown-menu" aria-labelledby="manageDropdown">
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<li><a class="dropdown-item" href="/admin_classes.php">Classes</a></li>
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<li><a class="dropdown-item active" href="/admin_subjects.php">Subjects</a></li>
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<li><a class="dropdown-item" href="/admin_teachers.php">Teachers</a></li>
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<li><a class="dropdown-item" href="/admin_workloads.php">Workloads</a></li>
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<li><a class="dropdown-item" href="/admin_timeslots.php">Timeslots</a></li>
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</ul>
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</li>
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<li class="nav-item"><a class="nav-link" href="/timetable.php">Class Timetable</a></li>
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<li class="nav-item"><a class="nav-link" href="/teacher_timetable.php">Teacher Timetable</a></li>
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<li class="nav-item"><a class="nav-link" href="/logout.php">Logout</a></li>
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<?php else: ?>
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<li class="nav-item"><a class="nav-link" href="/demo.php">Demo</a></li>
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<li class="nav-item"><a class="nav-link" href="/login.php">Login</a></li>
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<li class="nav-item"><a class="nav-link" href="/register.php">Register</a></li>
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<?php endif; ?>
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</ul>
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</div>
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</div>
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</nav>
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<main class="container py-5">
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<div class="row justify-content-center">
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<div class="col-lg-10">
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<h1 class="h2 fw-bold mb-4">Manage Subjects</h1>
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<?php if ($message): ?>
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<div class="alert alert-success"><?php echo $message; ?></div>
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<?php endif; ?>
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<?php if ($error): ?>
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<div class="alert alert-danger"><?php echo $error; ?></div>
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<?php endif; ?>
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<!-- Create/Edit Subject Form -->
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<div class="card mb-4">
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<div class="card-body">
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<h5 class="card-title"><?php echo $editing_subject ? 'Edit Subject' : 'Create a New Subject'; ?></h5>
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<form action="admin_subjects.php" method="POST">
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<input type="hidden" name="subject_id" value="<?php echo $editing_subject['id'] ?? ''; ?>">
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<div class="row">
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<div class="col-md-6 mb-3">
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<label for="subject_name" class="form-label">Subject Name</label>
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<input type="text" class="form-control" id="subject_name" name="subject_name" value="<?php echo htmlspecialchars($editing_subject['name'] ?? ''); ?>" placeholder="e.g., Mathematics" required>
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</div>
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<div class="col-md-6 mb-3">
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<label for="lessons_per_week" class="form-label">Lessons per Week</label>
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<input type="number" class="form-control" id="lessons_per_week" name="lessons_per_week" value="<?php echo htmlspecialchars($editing_subject['lessons_per_week'] ?? '1'); ?>" min="1" required>
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</div>
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</div>
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<div class="mb-3 form-check">
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<input type="checkbox" class="form-check-input" id="has_double_lesson" name="has_double_lesson" value="1" <?php echo !empty($editing_subject['has_double_lesson']) ? 'checked' : ''; ?>>
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<label class="form-check-label" for="has_double_lesson">Has one double lesson per week</label>
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</div>
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<div class="mb-3 form-check">
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<input type="checkbox" class="form-check-input" id="is_elective" name="is_elective" value="1" <?php echo !empty($editing_subject['is_elective']) ? 'checked' : ''; ?>>
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<label class="form-check-label" for="is_elective">Is Elective</label>
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</div>
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<div class="mb-3">
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<label for="elective_group_id" class="form-label">Elective Group (Optional)</label>
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<select class="form-select" id="elective_group_id" name="elective_group_id">
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<option value="">None</option>
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<?php foreach ($elective_groups as $group): ?>
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<option value="<?php echo $group['id']; ?>" <?php echo (isset($editing_subject['elective_group_id']) && $editing_subject['elective_group_id'] == $group['id']) ? 'selected' : ''; ?>>
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<?php echo htmlspecialchars($group['name']); ?>
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</option>
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<?php endforeach; ?>
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</select>
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</div>
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<button type="submit" class="btn btn-primary"><?php echo $editing_subject ? 'Update Subject' : 'Create Subject'; ?></button>
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<?php if ($editing_subject): ?>
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<a href="admin_subjects.php" class="btn btn-secondary">Cancel Edit</a>
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<?php endif; ?>
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</form>
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</div>
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</div>
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<!-- Existing Subjects List -->
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<div class="card">
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<div class="card-body">
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<h5 class="card-title">Existing Subjects</h5>
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<?php if (empty($subjects)): ?>
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<p class="text-muted">No subjects have been created yet.</p>
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<?php else: ?>
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<div class="table-responsive">
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<table class="table table-striped">
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<thead>
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<tr>
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<th>Name</th>
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<th>Lessons / Week</th>
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<th>Double Lesson</th>
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<th>Is Elective</th>
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<th>Elective Group</th>
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<th>Actions</th>
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</tr>
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</thead>
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<tbody>
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<?php foreach ($subjects as $subject): ?>
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<tr>
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<td><?php echo htmlspecialchars($subject['name']); ?></td>
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<td><?php echo htmlspecialchars($subject['lessons_per_week']); ?></td>
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<td><?php echo $subject['has_double_lesson'] ? 'Yes' : 'No'; ?></td>
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<td><?php echo $subject['is_elective'] ? 'Yes' : 'No'; ?></td>
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<td><?php echo htmlspecialchars($subject['elective_group_name'] ?? 'N/A'); ?></td>
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<td>
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<a href="?edit_id=<?php echo $subject['id']; ?>" class="btn btn-sm btn-outline-primary">Edit</a>
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<form action="admin_subjects.php" method="POST" class="d-inline" onsubmit="return confirm('Are you sure you want to delete this subject?');">
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<input type="hidden" name="delete_id" value="<?php echo $subject['id']; ?>">
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<button type="submit" class="btn btn-sm btn-outline-danger">Delete</button>
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</form>
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</td>
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</tr>
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<?php endforeach; ?>
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</tbody>
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</table>
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</div>
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<?php endif; ?>
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</div>
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</div>
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</div>
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</div>
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</main>
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<footer class="bg-dark text-white py-4 mt-5">
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<div class="container text-center">
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<p>© <?php echo date("Y"); ?> Haki Schedule. All Rights Reserved.</p>
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</div>
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</footer>
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<script src="https://cdn.jsdelivr.net/npm/bootstrap@5.3.2/dist/js/bootstrap.bundle.min.js"></script>
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</body>
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</html>
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