299 lines
15 KiB
PHP
299 lines
15 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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$editing_teacher = null;
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$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 = $_POST['delete_id'];
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// Also delete the associated user account
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$stmt = $pdo->prepare("SELECT user_id FROM teachers WHERE id = ? AND school_id = ?");
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$stmt->execute([$delete_id, $school_id]);
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$user_id = $stmt->fetchColumn();
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$pdo->beginTransaction();
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$stmt = $pdo->prepare("DELETE FROM teachers WHERE id = ?");
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$stmt->execute([$delete_id]);
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if ($user_id) {
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$stmt = $pdo->prepare("DELETE FROM users WHERE id = ?");
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$stmt->execute([$user_id]);
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}
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$pdo->commit();
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$message = "Teacher deleted successfully.";
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} catch (PDOException $e) {
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$pdo->rollBack();
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if ($e->getCode() == '23000') { // Integrity constraint violation
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$error = "Cannot delete this teacher because they are assigned to workloads or schedules. Please remove those associations before deleting.";
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} else {
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$error = "Error deleting teacher: " . $e->getMessage();
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}
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}
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}
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// Handle POST request to add or update a teacher
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if ($_SERVER['REQUEST_METHOD'] === 'POST' && isset($_POST['teacher_name'])) {
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$teacherName = trim($_POST['teacher_name']);
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$teacherEmail = trim($_POST['teacher_email']);
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$password = $_POST['password'] ?? null;
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$teacher_id = $_POST['teacher_id'] ?? null;
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if (empty($teacherName) || empty($teacherEmail)) {
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$error = 'Teacher name and email are required.';
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} elseif (!filter_var($teacherEmail, FILTER_VALIDATE_EMAIL)) {
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$error = 'Invalid email format.';
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} elseif (!$teacher_id && empty($password)) {
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$error = 'Password is required for new teachers.';
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} else {
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try {
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$pdo->beginTransaction();
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// Check for duplicate teacher name
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$stmt = $pdo->prepare("SELECT id FROM teachers WHERE name = ? AND school_id = ? AND id != ?");
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$stmt->execute([$teacherName, $school_id, $teacher_id ?? 0]);
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if ($stmt->fetch()) {
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throw new Exception("A teacher with this name already exists.");
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}
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if ($teacher_id) {
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// Update existing teacher
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$stmt = $pdo->prepare("UPDATE teachers SET name = ? WHERE id = ? AND school_id = ?");
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$stmt->execute([$teacherName, $teacher_id, $school_id]);
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// Also update user email
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$stmt = $pdo->prepare("SELECT user_id FROM teachers WHERE id = ?");
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$stmt->execute([$teacher_id]);
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$user_id = $stmt->fetchColumn();
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if ($user_id) {
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$sql = "UPDATE users SET email = ?, username = ?";
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$params = [$teacherEmail, $teacherEmail];
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if (!empty($password)) {
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$sql .= ", password = ?";
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$params[] = password_hash($password, PASSWORD_DEFAULT);
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}
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$sql .= " WHERE id = ?";
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$params[] = $user_id;
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$stmt = $pdo->prepare($sql);
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$stmt->execute($params);
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}
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$message = "Teacher updated successfully!";
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} else {
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// Check for duplicate email in users table
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$stmt = $pdo->prepare("SELECT id FROM users WHERE email = ?");
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$stmt->execute([$teacherEmail]);
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if ($stmt->fetch()) {
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throw new Exception("A user with this email already exists.");
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}
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// Insert new user
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$hashed_password = password_hash($password, PASSWORD_DEFAULT);
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$stmt = $pdo->prepare("INSERT INTO users (school_id, username, email, password, role) VALUES (?, ?, ?, ?, 'teacher')");
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$stmt->execute([$school_id, $teacherEmail, $teacherEmail, $hashed_password]);
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$user_id = $pdo->lastInsertId();
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// Insert new teacher
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$stmt = $pdo->prepare("INSERT INTO teachers (name, school_id, user_id) VALUES (?, ?, ?)");
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$stmt->execute([$teacherName, $school_id, $user_id]);
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$message = "Teacher created successfully!";
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}
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$pdo->commit();
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} catch (Exception $e) {
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if ($pdo->inTransaction()) {
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$pdo->rollBack();
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}
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$error = $e->getMessage();
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}
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}
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}
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// Handle Edit request
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if (isset($_GET['edit_id'])) {
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try {
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$edit_id = $_GET['edit_id'];
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$stmt = $pdo->prepare("SELECT t.*, u.email FROM teachers t LEFT JOIN users u ON t.user_id = u.id WHERE t.id = ? AND t.school_id = ?");
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$stmt->execute([$edit_id, $school_id]);
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$editing_teacher = $stmt->fetch(PDO::FETCH_ASSOC);
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} catch (PDOException $e) {
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$error = "Error fetching teacher: " . $e->getMessage();
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}
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}
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// Fetch all teachers to display
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$teachers = [];
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try {
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$teachers_stmt = $pdo->prepare("SELECT t.*, u.email FROM teachers t LEFT JOIN users u ON t.user_id = u.id WHERE t.school_id = ? ORDER BY t.name ASC");
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$teachers_stmt->execute([$school_id]);
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$teachers = $teachers_stmt->fetchAll(PDO::FETCH_ASSOC);
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} catch (PDOException $e) {
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$error = 'Database error: ' . $e->getMessage();
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}
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// Check for teachers with no user account linked
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$unlinked_teachers = [];
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foreach ($teachers as $teacher) {
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if (empty($teacher['user_id'])) {
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$unlinked_teachers[] = $teacher['name'];
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}
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}
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if (!empty($unlinked_teachers)) {
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$unlinked_list = '<ul>';
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foreach ($unlinked_teachers as $name) {
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$unlinked_list .= '<li>' . htmlspecialchars($name) . '</li>';
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}
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$unlinked_list .= '</ul>';
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$error .= '<div class="alert alert-warning mt-3"><strong>Data Inconsistency Found:</strong> The following teachers are not linked to a user account and will not be able to log in or see their timetables: ' . $unlinked_list . ' To fix this, please delete these teachers and create them again. This will create a linked user account for them.</div>';
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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 Teachers - 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" href="/admin_subjects.php">Subjects</a></li>
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<li><a class="dropdown-item" href="/admin_elective_groups.php">Elective Groups</a></li>
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<li><a class="dropdown-item active" 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-8">
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<h1 class="h2 fw-bold mb-4">Manage Teachers</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 Teacher 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_teacher ? 'Edit Teacher' : 'Create a New Teacher'; ?></h5>
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<form action="admin_teachers.php" method="POST">
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<input type="hidden" name="teacher_id" value="<?php echo $editing_teacher['id'] ?? ''; ?>">
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<div class="mb-3">
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<label for="teacher_name" class="form-label">Teacher Name</label>
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<input type="text" class="form-control" id="teacher_name" name="teacher_name" value="<?php echo htmlspecialchars($editing_teacher['name'] ?? ''); ?>" required>
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</div>
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<div class="mb-3">
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<label for="teacher_email" class="form-label">Teacher Email</label>
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<input type="email" class="form-control" id="teacher_email" name="teacher_email" value="<?php echo htmlspecialchars($editing_teacher['email'] ?? ''); ?>" required>
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</div>
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<div class="mb-3">
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<label for="password" class="form-label">Password</label>
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<input type="password" class="form-control" id="password" name="password" <?php echo $editing_teacher ? '' : 'required'; ?>>
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<?php if ($editing_teacher): ?>
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<small class="form-text text-muted">Leave blank to keep the current password.</small>
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<?php endif; ?>
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</div>
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<button type="submit" class="btn btn-primary"><?php echo $editing_teacher ? 'Update Teacher' : 'Create Teacher'; ?></button>
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<?php if ($editing_teacher): ?>
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<a href="admin_teachers.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 Teachers 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 Teachers</h5>
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<?php if (empty($teachers)): ?>
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<p class="text-muted">No teachers have been created yet.</p>
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<?php else: ?>
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<div class="table-responsive">
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<table class="table table-striped">
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<thead>
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<tr>
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<th>Name</th>
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<th>Email</th>
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<th>Actions</th>
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</tr>
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</thead>
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<tbody>
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<?php foreach ($teachers as $teacher): ?>
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<tr>
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<td>
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<?php echo htmlspecialchars($teacher['name']); ?>
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<?php if (empty($teacher['user_id'])): ?>
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<span class="badge bg-danger" title="This teacher is not linked to a user account.">!</span>
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<?php endif; ?>
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</td>
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<td><?php echo htmlspecialchars($teacher['email']); ?></td>
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<td>
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<a href="?edit_id=<?php echo $teacher['id']; ?>" class="btn btn-sm btn-outline-primary">Edit</a>
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<form action="admin_teachers.php" method="POST" class="d-inline" onsubmit="return confirm('Are you sure you want to delete this teacher?');">
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<input type="hidden" name="delete_id" value="<?php echo $teacher['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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