b2in/app/Http/Controllers/Api/DisplayPreviewController.php

<?php

namespace App\Http\Controllers\Api;

use App\Http\Controllers\Controller;
use App\Models\Display;
use App\Services\DisplayPlaylistConfigBuilder;
use Illuminate\Http\JsonResponse;
use Symfony\Component\HttpFoundation\BinaryFileResponse;

class DisplayPreviewController extends Controller
{
    public function show(string $token): BinaryFileResponse
    {
        Display::query()
            ->where('preview_token', $token)
            ->firstOrFail();

        return response()->file(public_path('_cabinet/display/index.html'), [
            'Cache-Control' => 'no-cache, must-revalidate',
        ]);
    }

    public function config(string $token, DisplayPlaylistConfigBuilder $configBuilder): JsonResponse
    {
        $display = Display::query()
            ->where('preview_token', $token)
            ->firstOrFail();

        $playlist = $display->draftPlaylist()
            ->with('modules.items')
            ->first();

        if (! $playlist || $playlist->modules->isEmpty()) {
            return response()->json(['error' => 'Display preview not configured'], 404);
        }

        return response()->json($configBuilder->fromPlaylist($playlist));
    }
}