Initial Upload

includes/Database.php

@@ -0,0 +1,72 @@
+<?php
+class Database {
+    private static $instance = null;
+    private $pdo;
+    
+    private function __construct() {
+        try {
+            $this->pdo = new PDO(
+                "mysql:host=" . DB_HOST . ";dbname=" . DB_NAME . ";charset=utf8mb4",
+                DB_USER,
+                DB_PASS,
+                [
+                    PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION,
+                    PDO::ATTR_DEFAULT_FETCH_MODE => PDO::FETCH_ASSOC,
+                    PDO::ATTR_EMULATE_PREPARES => false
+                ]
+            );
+        } catch (PDOException $e) {
+            die("Datenbankverbindung fehlgeschlagen: " . $e->getMessage());
+        }
+    }
+    
+    public static function getInstance() {
+        if (self::$instance === null) {
+            self::$instance = new self();
+        }
+        return self::$instance;
+    }
+    
+    public function getConnection() {
+        return $this->pdo;
+    }
+    
+    // Helper-Methode für Queries
+    public function query($sql, $params = []) {
+        $stmt = $this->pdo->prepare($sql);
+        $stmt->execute($params);
+        return $stmt;
+    }
+    
+    // Helper für einzelnen Datensatz
+    public function fetchOne($sql, $params = []) {
+        $stmt = $this->query($sql, $params);
+        return $stmt->fetch();
+    }
+    
+    // Helper für mehrere Datensätze
+    public function fetchAll($sql, $params = []) {
+        $stmt = $this->query($sql, $params);
+        return $stmt->fetchAll();
+    }
+    
+    // Helper für Insert/Update mit Rückgabe der ID
+    public function execute($sql, $params = []) {
+        $this->query($sql, $params);
+        return $this->pdo->lastInsertId();
+    }
+    
+    // Settings-Helper
+    public function getSetting($key, $default = null) {
+        $result = $this->fetchOne("SELECT setting_value FROM settings WHERE setting_key = ?", [$key]);
+        return $result ? $result['setting_value'] : $default;
+    }
+    
+    public function setSetting($key, $value) {
+        $this->query(
+            "INSERT INTO settings (setting_key, setting_value) VALUES (?, ?) 
+             ON DUPLICATE KEY UPDATE setting_value = VALUES(setting_value)",
+            [$key, $value]
+        );
+    }
+}