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1 | <?php |
2 | /** |
3 | * Jingga |
4 | * |
5 | * PHP Version 8.1 |
6 | * |
7 | * @package phpOMS\Utils\Parser\Pdf |
8 | * @copyright Dennis Eichhorn |
9 | * @license OMS License 2.0 |
10 | * @version 1.0.0 |
11 | * @link https://jingga.app |
12 | */ |
13 | declare(strict_types=1); |
14 | |
15 | namespace phpOMS\Utils\Parser\Pdf; |
16 | |
17 | use phpOMS\Ai\Ocr\Tesseract\TesseractOcr; |
18 | use phpOMS\System\SystemUtils; |
19 | use phpOMS\Utils\StringUtils; |
20 | |
21 | /** |
22 | * Pdf parser class. |
23 | * |
24 | * @package phpOMS\Utils\Parser\Pdf |
25 | * @license OMS License 2.0 |
26 | * @link https://jingga.app |
27 | * @since 1.0.0 |
28 | */ |
29 | class PdfParser |
30 | { |
31 | /** |
32 | * PDFToText path. |
33 | * |
34 | * @var string |
35 | * @var 1.0.0 |
36 | */ |
37 | public static string $pdftotext = '/usr/bin/pdftotext'; |
38 | |
39 | /** |
40 | * PDFToPPM path. |
41 | * |
42 | * @var string |
43 | * @var 1.0.0 |
44 | */ |
45 | public static string $pdftoppm = '/usr/bin/pdftoppm'; |
46 | |
47 | /** |
48 | * Pdf to text |
49 | * |
50 | * @param string $path Pdf path |
51 | * |
52 | * @return string |
53 | * |
54 | * @since 1.0.0 |
55 | */ |
56 | public static function pdf2text(string $path, string $optimizer = '') : string |
57 | { |
58 | $text = ''; |
59 | $tmpDir = \sys_get_temp_dir(); |
60 | |
61 | $out = \tempnam($tmpDir, 'oms_pdf_'); |
62 | if ($out === false) { |
63 | return ''; |
64 | } |
65 | |
66 | if (\is_file(self::$pdftotext)) { |
67 | try { |
68 | SystemUtils::runProc( |
69 | self::$pdftotext, '-layout ' |
70 | . \escapeshellarg($path) . ' ' |
71 | . \escapeshellarg($out) |
72 | ); |
73 | } catch (\Throwable $_) { |
74 | \unlink($out); |
75 | |
76 | return ''; |
77 | } |
78 | } |
79 | |
80 | $text = \file_get_contents($out); |
81 | \unlink($out); |
82 | |
83 | if ($text === false) { |
84 | $text = ''; |
85 | } |
86 | |
87 | if (\strlen($text) > 255) { |
88 | return $text; |
89 | } |
90 | |
91 | $out = \tempnam($tmpDir, 'oms_pdf_'); |
92 | if ($out === false) { |
93 | return ''; |
94 | } |
95 | |
96 | if (\is_file(self::$pdftoppm)) { |
97 | try { |
98 | SystemUtils::runProc( |
99 | self::$pdftoppm, |
100 | '-jpeg -r 300 ' |
101 | . \escapeshellarg($path) . ' ' |
102 | . \escapeshellarg($out) |
103 | ); |
104 | } catch (\Throwable $_) { |
105 | \unlink($out); |
106 | |
107 | return ''; |
108 | } |
109 | } |
110 | |
111 | $files = \glob($out . '*'); |
112 | if ($files === false) { |
113 | \unlink($out); |
114 | |
115 | return $text === false ? '' : $text; |
116 | } |
117 | |
118 | foreach ($files as $file) { |
119 | if (!StringUtils::endsWith($file, '.jpg') |
120 | && !StringUtils::endsWith($file, '.png') |
121 | && !StringUtils::endsWith($file, '.gif') |
122 | ) { |
123 | continue; |
124 | } |
125 | |
126 | /* Too slow |
127 | Thresholding::integralThresholding($file, $file); |
128 | Skew::autoRotate($file, $file, 10); |
129 | */ |
130 | |
131 | if (!empty($optimizer) && \is_file($optimizer)) { |
132 | try { |
133 | SystemUtils::runProc( |
134 | $optimizer, |
135 | \escapeshellarg($file) . ' ' |
136 | . \escapeshellarg($file) |
137 | ); |
138 | } catch (\Throwable $_) { |
139 | \unlink($file); |
140 | |
141 | continue; |
142 | } |
143 | } |
144 | |
145 | $ocr = new TesseractOcr(); |
146 | $text = $ocr->parseImage($file); |
147 | |
148 | \unlink($file); |
149 | } |
150 | |
151 | \unlink($out); |
152 | |
153 | return $text; |
154 | } |
155 | } |