Download.php

<?php

namespace App\Http\Controllers\Web;

use App\Http\Controller;
use Illuminate\Support\Facades\Response;
use Illuminate\Support\Facades\Storage;
use Illuminate\View\View;
use Symfony\Component\HttpFoundation\BinaryFileResponse;
use function array_merge;
use function file_exists;
use function file_get_contents;
use function filemtime;
use function request;
use function view;


/**
 * Class Download
 * @package App\Http\Controllers\Web
 */
class Download extends Controller
{
    /**
     * @var array
     */
    const HEADERS = [
        'pdf' => [
            'Content-Type' => 'application/pdf'
        ],
        'jpg' => [
            'Content-Type' => 'image/png'
        ],
        'jpeg' => [
            'Content-Type' => 'image/png'
        ],
        'png' => [
            'Content-Type' => 'image/png'
        ],
        'mp3' => [
            'Content-Type' => 'audio/mpeg'
        ],
        'mp4' => [
            'Content-Type' => 'video/mp4'
        ],
    ];

    /**
     * @param $file
     * @return View|BinaryFileResponse
     */
    function __invoke($file)
    {
        $filename = storage_path() . '/app/' . $file;
        if (!file_exists($filename)) {
            return view('page.410');
        }
        $info = pathinfo($filename);

        $extension = $info['extension'];

        $name = request()->get('name');
        if (!$name) {
            $name = 'document' . '.' . $extension;
        }
        $static = static::HEADERS;
        $headers = isset($static[$extension]) ? $static[$extension] : ['Content-Type' => 'text/html'];

        if (request()->get('download')) {
            return response()->download($filename, $name, $headers);
        }
        /** @noinspection PhpUndefinedMethodInspection */
        return Response::make(
            file_get_contents($filename),
            200,
            array_merge($headers, ['Content-Disposition' => 'inline; filename="' . $name . '"'])
        );
    }
}