Initial commit - TPU Survey System with Google Forms & Certificate Generator

2026-09-12 11:56:34 +07:00
commit 72eb7cd0c8
355 changed files with 117012 additions and 0 deletions
@@ -0,0 +1,48 @@
+<?php
+/**
+ * Authentication Helper
+ * TPU Survey System
+ */
+
+session_start();
+
+function isLoggedIn() {
+    return isset($_SESSION['user_id']);
+}
+
+function isAdmin() {
+    return isset($_SESSION['role']) && $_SESSION['role'] === 'admin';
+}
+
+function isTeacher() {
+    return isset($_SESSION['role']) && $_SESSION['role'] === 'teacher';
+}
+
+function requireLogin() {
+    if (!isLoggedIn()) {
+        http_response_code(401);
+        header('Content-Type: application/json; charset=utf-8');
+        echo json_encode(['error' => 'กรุณาเข้าสู่ระบบ']);
+        exit;
+    }
+}
+
+function requireAdmin() {
+    requireLogin();
+    if (!isAdmin()) {
+        http_response_code(403);
+        header('Content-Type: application/json; charset=utf-8');
+        echo json_encode(['error' => 'ไม่มีสิทธิ์เข้าถึง']);
+        exit;
+    }
+}
+
+function getCurrentUser() {
+    if (!isLoggedIn()) return null;
+    return [
+        'id' => $_SESSION['user_id'],
+        'username' => $_SESSION['username'],
+        'role' => $_SESSION['role'],
+        'full_name' => $_SESSION['full_name']
+    ];
+}