Stand 2026-04-13: PHP/MySQL Infrastruktur, Flussmanagement, Stadt-Prototyp

- PHP/MySQL Backend (XAMPP + Produktionsserver) - Front-Controller, API-Endpunkte, Session-Management - Flussmanagement-Simulation (Echtzeit, Punkt-basierter Fluss) - Stadt & Raumplanung (Prototyp, Top-Down Kachelsystem) - Klimawaechter 3D: Deiche kleiner, Baeume kippen, Budget angepasst - persistence.ts: Dualer Speicher (localStorage + Server-API) - 6 Unit-Test-Dateien fuer bestehende Simulationen Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
2026-04-13 16:43:42 +02:00
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+<?php
+/**
+ * GeoGraSim — Thin Database Wrapper
+ */
+
+require_once __DIR__ . '/../config/db.php';
+
+class Database {
+    private PDO $pdo;
+    private static ?Database $instance = null;
+
+    private function __construct() {
+        $this->pdo = getDB();
+    }
+
+    public static function get(): Database {
+        if (self::$instance === null) {
+            self::$instance = new Database();
+        }
+        return self::$instance;
+    }
+
+    public function query(string $sql, array $params = []): PDOStatement {
+        $stmt = $this->pdo->prepare($sql);
+        $stmt->execute($params);
+        return $stmt;
+    }
+
+    public function fetchOne(string $sql, array $params = []): ?array {
+        $stmt = $this->query($sql, $params);
+        $row = $stmt->fetch();
+        return $row ?: null;
+    }
+
+    public function fetchAll(string $sql, array $params = []): array {
+        return $this->query($sql, $params)->fetchAll();
+    }
+
+    public function execute(string $sql, array $params = []): int {
+        $stmt = $this->query($sql, $params);
+        return $stmt->rowCount();
+    }
+
+    public function lastInsertId(): string {
+        return $this->pdo->lastInsertId();
+    }
+}