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1<?php
2/**
3 * Pop PHP Framework (http://www.popphp.org/)
4 *
5 * @link       https://github.com/popphp/popphp-framework
6 * @author     Nick Sagona, III <dev@nolainteractive.com>
7 * @copyright  Copyright (c) 2009-2024 NOLA Interactive, LLC. (http://www.nolainteractive.com)
8 * @license    http://www.popphp.org/license     New BSD License
9 */
10
11/**
12 * @namespace
13 */
14namespace Pop\Pdf\Build\PdfObject;
15
16/**
17 * Pdf abstract object class
18 *
19 * @category   Pop
20 * @package    Pop\Pdf
21 * @author     Nick Sagona, III <dev@nolainteractive.com>
22 * @copyright  Copyright (c) 2009-2024 NOLA Interactive, LLC. (http://www.nolainteractive.com)
23 * @license    http://www.popphp.org/license     New BSD License
24 * @version    5.0.0
25 */
26abstract class AbstractObject implements ObjectInterface
27{
28
29    /**
30     * PDF object index
31     * @var ?int
32     */
33    protected ?int $index = null;
34
35    /**
36     * PDF object data
37     * @var ?string
38     */
39    protected ?string $data = null;
40
41    /**
42     * Imported flag
43     * @var bool
44     */
45    protected bool $isImported = false;
46
47    /**
48     * Set the object index
49     *
50     * @param  int $i
51     * @return AbstractObject
52     */
53    public function setIndex(int $i): AbstractObject
54    {
55        $this->index = $i;
56        return $this;
57    }
58
59    /**
60     * Set the object data
61     *
62     * @param  string $data
63     * @return AbstractObject
64     */
65    public function setData(string $data): AbstractObject
66    {
67        $this->data = $data;
68        return $this;
69    }
70
71    /**
72     * Set whether the object is imported
73     *
74     * @param  bool $imported
75     * @return AbstractObject
76     */
77    public function setImported(bool $imported)
78    {
79        $this->isImported = $imported;
80        return $this;
81    }
82
83    /**
84     * Get the object index
85     *
86     * @return ?int
87     */
88    public function getIndex(): ?int
89    {
90        return $this->index;
91    }
92
93    /**
94     * Get the object stream
95     *
96     * @return ?string
97     */
98    public function getData(): ?string
99    {
100        return $this->data;
101    }
102
103    /**
104     * Determine if the object is imported
105     *
106     * @return bool
107     */
108    public function isImported(): bool
109    {
110        return $this->isImported;
111    }
112
113    /**
114     * Get the integer references within a dictionary stream
115     *
116     * @param  string $dictionary
117     * @return array
118     */
119    public function getDictionaryReferences(string $dictionary): array
120    {
121        $dictionary = trim($dictionary);
122
123        if (str_starts_with($dictionary, '[')) {
124            $dictionary = substr($dictionary, 0, strpos($dictionary, ']'));
125            $dictionary = trim(str_replace(['[', '0 R', '1 R', ' '], ['', '|', '|', ''], $dictionary));
126            if (str_ends_with($dictionary, '|')) {
127                $dictionary = substr($dictionary, 0, -1);
128            }
129            $references = explode('|', $dictionary);
130        } else {
131            $references = [substr($dictionary, 0, strpos($dictionary, ' '))];
132        }
133
134        return $references;
135    }
136
137    /**
138     * Method to print the object
139     *
140     * @return string
141     */
142    abstract public function __toString(): string;
143
144}