firefly-iii/app/Console/Commands/DecryptAttachment.php

<?php
/**
 * DecryptAttachment.php
 * Copyright (c) 2017 thegrumpydictator@gmail.com
 * This software may be modified and distributed under the terms of the Creative Commons Attribution-ShareAlike 4.0 International License.
 *
 * See the LICENSE file for details.
 */

declare(strict_types=1);

namespace FireflyIII\Console\Commands;

use FireflyIII\Repositories\Attachment\AttachmentRepositoryInterface;
use Illuminate\Console\Command;
use Log;

/**
 * Class DecryptAttachment
 *
 * @package FireflyIII\Console\Commands
 */
class DecryptAttachment extends Command
{
    /**
     * The console command description.
     *
     * @var string
     */
    protected $description = 'Decrypts an attachment and dumps the content in a file in the given directory.';

    /**
     * The name and signature of the console command.
     *
     * @var string
     */
    protected $signature = 'firefly:decrypt-attachment {id} {name} {directory}';


    /**
     * Create a new command instance.
     *
     */
    public function __construct()
    {
        parent::__construct();

    }

    /**
     * Execute the console command.
     */
    public function handle()
    {
        /** @var AttachmentRepositoryInterface $repository */
        $repository     = app(AttachmentRepositoryInterface::class);
        $attachmentId   = intval($this->argument('id'));
        $attachment     = $repository->findWithoutUser($attachmentId);
        $attachmentName = trim($this->argument('name'));
        $storagePath    = realpath(trim($this->argument('directory')));
        if (is_null($attachment->id)) {
            $this->error(sprintf('No attachment with id #%d', $attachmentId));
            Log::error(sprintf('DecryptAttachment: No attachment with id #%d', $attachmentId));

            return;
        }

        if ($attachmentName !== $attachment->filename) {
            $this->error('File name does not match.');
            Log::error('DecryptAttachment: File name does not match.');

            return;
        }

        if (!is_dir($storagePath)) {
            $this->error(sprintf('Path "%s" is not a directory.', $storagePath));
            Log::error(sprintf('DecryptAttachment: Path "%s" is not a directory.', $storagePath));

            return;
        }

        if (!is_writable($storagePath)) {
            $this->error(sprintf('Path "%s" is not writable.', $storagePath));
            Log::error(sprintf('DecryptAttachment: Path "%s" is not writable.', $storagePath));

            return;
        }

        $fullPath = $storagePath . DIRECTORY_SEPARATOR . $attachment->filename;
        $content  = $repository->getContent($attachment);
        $this->line(sprintf('Going to write content for attachment #%d into file "%s"', $attachment->id, $fullPath));
        $result = file_put_contents($fullPath, $content);
        if ($result === false) {
            $this->error('Could not write to file.');

            return;
        }
        $this->info(sprintf('%d bytes written. Exiting now..', $result));

        return;
    }
}