restore composer.json, add mysqli extension

app/Http/Controllers/API/UsefulInfoController.php

@@ -0,0 +1,39 @@
+<?php
+
+namespace App\Http\Controllers\API;
+
+use App\Http\Controllers\Controller;
+use App\Http\Resources\UsefulInfoItemResource;
+use App\Http\Resources\UsefulInfoResource;
+use App\Models\UsefulInfo;
+
+class UsefulInfoController extends Controller
+{
+    public function index()
+    {
+        $usefulInfos = UsefulInfo::orderBy('position')->get();
+
+        return UsefulInfoResource::collection($usefulInfos);
+    }
+
+    public function items($id)
+    {
+        $usefulInfo = UsefulInfo::find($id);
+
+        // chech if useful info not found
+        if (!$usefulInfo) {
+            return response()->json([
+                'message' => 'Useful info not found'
+            ], 404);
+        }
+
+        return UsefulInfoItemResource::collection($usefulInfo->items);
+    }
+
+    public function itemShow($id, $itemId)
+    {
+        $usefulInfo = UsefulInfo::find($id);
+
+        return new UsefulInfoItemResource($usefulInfo->items->find($itemId));
+    }
+}