feat: initial impl w/ styles, scripts, & server-side logic (steps 1, 2, 3)

assessment/src/utils.php

@@ -0,0 +1,37 @@
+<?php
+class DataManager
+{
+    private static function readJsonFile(string $filename): array
+    {
+        $path = __DIR__ . '/../data/' . $filename;
+        if (!file_exists($path)) {
+            return [];
+        }
+        $content = file_get_contents($path);
+        $data = json_decode($content, true);
+        return is_array($data) ? $data : [];
+    }
+
+    public static function getCars(string $clientId): array
+    {
+        $cars = self::readJsonFile('cars.json');
+        return array_values(array_filter($cars, fn($c) => isset($c['customer']) && $c['customer'] === $clientId));
+    }
+
+    public static function getGarages(string $clientId): array
+    {
+        $garages = self::readJsonFile('garages.json');
+        return array_values(array_filter($garages, fn($g) => isset($g['customer']) && $g['customer'] === $clientId));
+    }
+
+    public static function getGarageById($id): ?array
+    {
+        $garages = self::readJsonFile('garages.json');
+        foreach ($garages as $g) {
+            if (isset($g['id']) && $g['id'] == $id) {
+                return $g;
+            }
+        }
+        return null;
+    }
+}