core/app/Http/Controllers/Admin/EditUploadedFile.php

<?php

namespace App\Http\Controllers\Admin;

use App\Events\EditFile;
use App\Helpers\FileManager;
use App\Http\Controllers\Controller;
use App\Http\Requests\EditUploadedFileRequest;
use App\Models\File;
use Illuminate\Support\Facades\Event;
use Symfony\Component\HttpKernel\Exception\NotFoundHttpException;

class EditUploadedFile extends Controller
{
    /**
     * Edit form
     *
     * Render edit form for displaying details and updating given file
     *
     * @param int $id file id
     *
     * @return \Illuminate\Contracts\View\Factory|\Illuminate\Http\RedirectResponse|\Illuminate\View\View
     */
    public function getDetail($id)
    {
        try {
            $file = File::findOrFail($id);
        } catch (NotFoundHttpException $e) {
            return $this->fileNotFound();
        }

        return view('admin.fileManager.edit', [
            'file'      => $file,
            'extraInfo' => FileManager::getAdditionalInfo($file)
        ]);
    }

    /**
     * Updates file
     *
     * User can change only keywords, original filename and description. Mime type, hash and other fields remain
     * unchanged
     *
     * @param EditUploadedFileRequest $request
     * @param                         $id
     *
     * @return \Illuminate\Http\RedirectResponse
     */
    public function postEdit(EditUploadedFileRequest $request, $id)
    {
        try {
            $file = File::findOrFail($id);
        } catch (NotFoundHttpException $e) {
            return $this->fileNotFound();
        }

        // set values from form
        $file->name = $request->name;
        $file->keywords = $request->keywords;
        $file->description = $request->description;
        $file->save();

        // fire action
        Event::fire(new EditFile($file));

        // update successfull
        return redirect()
            ->route('upload.detail', ['id' => $id])
            ->with('success', trans('admin/fileManager.successfullyChanged'));
    }

    /**
     * Deletes file
     *
     * @param $id
     */
    public function deleteFile($id)
    {
        try {
            $file = File::findOrFail($id);
        } catch (NotFoundHttpException $e) {
            return $this->fileNotFound();
        }

        $file->delete();

        return redirect()
            ->route('upload.overview')
            ->with('success', trans('admin/fileManager.fileDeleted'));
    }

    /**
     * Redirects user to files overview
     *
     * @return \Illuminate\Http\RedirectResponse
     */
    private function fileNotFound()
    {
        return redirect()
            ->route('upload.overview')
            ->with('error', trans('admin/fileManager.fileNotFound'));
    }
}