snipe-it/app/Http/Traits/ConvertsBase64toFiles.php

<?php

namespace App\Traits;

use Illuminate\Http\UploadedFile;
use Illuminate\Support\Arr;
use Illuminate\Support\Collection;
use Illuminate\Support\Str;
use Symfony\Component\HttpFoundation\FileBag;
use Symfony\Component\HttpFoundation\ParameterBag;

trait ConvertsBase64ToFiles
{
    protected function base64FileKeys(): array
    {
        return [];
    }

    /**
     * Helper method to get the body parameters bag.
     *
     * @return \Symfony\Component\HttpFoundation\ParameterBag
     */
    private function bodyParametersBag(): ParameterBag
    {
        return $this->request;
    }

    /**
     * Helper method to get the uploaded files bag.
     *
     * @return FileBag
     */
    private function uploadFilesBag(): FileBag
    {
        return $this->files;
    }

    /**
     * Pulls the Base64 contents for each file key and creates
     * an UploadedFile instance from it and sets it on the
     * request.
     *
     * @return void
     */
    protected function prepareForValidation()
    {
        $flattened = Arr::dot($this->base64FileKeys());

        Collection::make($flattened)->each(function ($filename, $key) {
            rescue(function () use ($key, $filename) {
                // dont process plain files
                if ( $this->file($key)){
                    return;
                }

                $base64Contents = $this->input($key);

                if (!$base64Contents) {
                    return;
                }
                
                // autogenerate filenames
                if ($filename == 'auto'){
                    $header = explode(';', $base64Contents, 2)[0];
                    // Grab the image type from the header while we're at it.
                    $filename = $key . '.' . substr($header, strpos($header, '/')+1);
                }

                // Generate a temporary path to store the Base64 contents
                $tempFilePath = tempnam(sys_get_temp_dir(), $filename);

                // Store the contents using a stream, or by decoding manually
                if (Str::startsWith($base64Contents, 'data:') && count(explode(',', $base64Contents)) > 1) {
                    $source = fopen($base64Contents, 'r');
                    $destination = fopen($tempFilePath, 'w');

                    stream_copy_to_stream($source, $destination);

                    fclose($source);
                    fclose($destination);
                } else {
                    file_put_contents($tempFilePath, base64_decode($base64Contents, true));
                }

                $uploadedFile = new UploadedFile($tempFilePath, $filename, null, null, true);

                $body = $this->bodyParametersBag()->all();
                Arr::forget($body, $key);
                $this->bodyParametersBag()->replace($body);

                $files = $this->uploadFilesBag()->all();
                Arr::set($files, $key, $uploadedFile);
                $this->uploadFilesBag()->replace($files);
            }, null, false);
        });
    }
}
/**
 * This file based on https://github.com/protonemedia/laravel-mixins/tree/master/src/Request
 * 
 * MIT License
 *
 * Copyright (c) Protone Media B.V.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */