<?php
/************************************************************************
 * This file is part of EspoCRM.
 *
 * EspoCRM - Open Source CRM application.
 * Copyright (C) 2014-2023 Yurii Kuznietsov, Taras Machyshyn, Oleksii Avramenko
 * Website: https://www.espocrm.com
 *
 * EspoCRM is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * EspoCRM is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with EspoCRM. If not, see http://www.gnu.org/licenses/.
 *
 * The interactive user interfaces in modified source and object code versions
 * of this program must display Appropriate Legal Notices, as required under
 * Section 5 of the GNU General Public License version 3.
 *
 * In accordance with Section 7(b) of the GNU General Public License version 3,
 * these Appropriate Legal Notices must retain the display of the "EspoCRM" word.
 ************************************************************************/

namespace Espo\Tools\Pdf\Dompdf;

use Espo\Tools\Pdf\Contents as ContentsInterface;

use GuzzleHttp\Psr7\Stream;
use Psr\Http\Message\StreamInterface;
use Dompdf\Dompdf;

use RuntimeException;

class Contents implements ContentsInterface
{
    private ?string $string = null;

    public function __construct(private Dompdf $pdf) {}

    public function getStream(): StreamInterface
    {
        $resource = fopen('php://temp', 'r+');

        if ($resource === false) {
            throw new RuntimeException("Could not open temp.");
        }

        fwrite($resource, $this->getString());
        rewind($resource);

        return new Stream($resource);
    }

    public function getString(): string
    {
        if ($this->string === null) {
            $this->string = $this->pdf->output();
        }

        return $this->string ?? '';
    }

    public function getLength(): int
    {
        return strlen($this->getString());
    }
}