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1<?php
2
3declare(strict_types=1);
4
5namespace Phpdftk\Pdf\Core\FileSpec;
6
7use Phpdftk\Pdf\Core\PdfDictionary;
8use Phpdftk\Pdf\Core\PdfNumber;
9use Phpdftk\Pdf\Core\PdfString;
10use Phpdftk\Pdf\Core\PdfVersion;
11use Phpdftk\Pdf\Core\RequiresPdfVersion;
12use Phpdftk\Pdf\Core\Serializable;
13
14/**
15 * Embedded file parameters (`/Params` entry of an EmbeddedFile stream) —
16 * ISO 32000-2 §7.11.4 Table 43.
17 *
18 * Appears inline inside an EmbeddedFile stream's dictionary; not a
19 * standalone indirect object.
20 */
21#[RequiresPdfVersion(PdfVersion::V1_3)]
22class EmbeddedFileParams implements Serializable
23{
24    public ?int $size = null;                 // /Size      - file size
25    public ?PdfString $creationDate = null;   // /CreationDate
26    public ?PdfString $modDate = null;        // /ModDate
27    public ?PdfString $mac = null;            // /Mac  - legacy
28    public ?PdfString $checkSum = null;       // /CheckSum (MD5, hex-encoded)
29
30    public function toPdf(): string
31    {
32        $dict = new PdfDictionary();
33        if ($this->size !== null) {
34            $dict->set('Size', new PdfNumber($this->size));
35        }
36        if ($this->creationDate !== null) {
37            $dict->set('CreationDate', $this->creationDate);
38        }
39        if ($this->modDate !== null) {
40            $dict->set('ModDate', $this->modDate);
41        }
42        if ($this->mac !== null) {
43            $dict->set('Mac', $this->mac);
44        }
45        if ($this->checkSum !== null) {
46            $dict->set('CheckSum', $this->checkSum);
47        }
48        return $dict->toPdf();
49    }
50}