fluent-cart / app / Services / PDF / PdfGeneratorService.php

PdfGeneratorService.php in FluentCart A New Era of eCommerce – Faster, Lighter, and Simpler 1.6.4, at app/Services/PDF/PdfGeneratorService.php

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1	<?php
2
3	namespace FluentCart\App\Services\PDF;
4
5	use FluentPdf\Classes\Controller\AvailableOptions;
6
7	class PdfGeneratorService
8	{
9	private $workingDir = '';
10	private $tempDir = '';
11	private $pdfCacheDir = '';
12	private $fontDir = '';
13
14	public function __construct()
15	{
16	if (!defined('FLUENT_PDF')) {
17	return;
18	}
19
20	$dirStructure = AvailableOptions::getDirStructure();
21
22	$this->workingDir = $dirStructure['workingDir'];
23	$this->tempDir = $dirStructure['tempDir'];
24	$this->pdfCacheDir = $dirStructure['pdfCacheDir'];
25	$this->fontDir = $dirStructure['fontDir'];
26	}
27
28	public function getGenerator(array $mpdfConfig = []): \FluentPdf\Vendor\Mpdf\Mpdf
29	{
30	$uploadDir = wp_upload_dir();
31	$fluentPdfFontDir = $uploadDir['basedir'] . '/FLUENT_PDF_TEMPLATES/fonts';
32
33	$fontDirs = [$this->fontDir];
34	if (is_dir($fluentPdfFontDir)) {
35	$fontDirs[] = $fluentPdfFontDir;
36	}
37
38	$defaults = [
39	'fontDir' => $fontDirs,
40	'tempDir' => $this->tempDir,
41	'curlCaCertificate' => ABSPATH . WPINC . '/certificates/ca-bundle.crt',
42	'curlFollowLocation' => true,
43	'allow_output_buffering' => true,
44	'autoLangToFont' => true,
45	'autoScriptToLang' => true,
46	'useSubstitutions' => true,
47	'ignore_invalid_utf8' => true,
48	'setAutoTopMargin' => 'stretch',
49	'setAutoBottomMargin' => 'stretch',
50	'enableImports' => true,
51	'use_kwt' => true,
52	'keepColumns' => true,
53	'biDirectional' => true,
54	'showWatermarkText' => true,
55	'showWatermarkImage' => true,
56	'default_font' => 'dejavusans',
57	];
58
59	$mpdfConfig = wp_parse_args($mpdfConfig, $defaults);
60
61	$mpdfConfig = apply_filters('fluent_cart/pdf_templates/mpdf_config', $mpdfConfig);
62
63	return new \FluentPdf\Vendor\Mpdf\Mpdf($mpdfConfig);
64	}
65
66	public function getTempDirectory(): string
67	{
68	return $this->tempDir;
69	}
70
71	/**
72	* Resolve same-site image URLs in HTML to local filesystem paths for mPDF.
73	*
74	* @param string $html
75	* @return string
76	*/
77	public function prepareHtmlForPdf(string $html): string
78	{
79	if ($html === '') {
80	return $html;
81	}
82
83	// Remove <img> tags with empty src to prevent mPDF errors
84	$html = preg_replace('/<img\s[^>]\bsrc\s=\s["\']["\'][^>]>/i', '', $html) ?? $html;
85
86	$upload_dir = wp_upload_dir();
87	$content_url = content_url();
88	$content_dir = WP_CONTENT_DIR;
89	$home_host = wp_parse_url(home_url(), PHP_URL_HOST);
90
91	$resolveUrl = function ($url) use ($upload_dir, $content_url, $content_dir, $home_host) {
92	$url = trim($url);
93	if ($url === '' \|\| strpos($url, 'data:') === 0) {
94	return null;
95	}
96	$url_host = wp_parse_url($url, PHP_URL_HOST);
97	if ($url_host !== null && $url_host !== $home_host) {
98	return null;
99	}
100	$path_part = wp_parse_url($url, PHP_URL_PATH);
101	if ($path_part === null \|\| $path_part === '') {
102	return null;
103	}
104	if (!empty($upload_dir['baseurl']) && strpos($url, $upload_dir['baseurl']) === 0) {
105	$local_path = $upload_dir['basedir'] . substr($path_part, strlen(wp_parse_url($upload_dir['baseurl'], PHP_URL_PATH)));
106	$local_path = wp_normalize_path($local_path);
107	if (file_exists($local_path) && is_readable($local_path)) {
108	return $local_path;
109	}
110	return null;
111	}
112	if (!empty($content_url) && strpos($url, $content_url) === 0) {
113	$content_path = wp_parse_url($content_url, PHP_URL_PATH);
114	$local_path = $content_dir . substr($path_part, strlen($content_path));
115	$local_path = wp_normalize_path($local_path);
116	if (file_exists($local_path) && is_readable($local_path)) {
117	return $local_path;
118	}
119	return null;
120	}
121	return null;
122	};
123
124	$html = preg_replace_callback(
125	'/(<img\s[^>]\bsrc\s=\s["\'])([^"\']+)(["\'][^>]>)\|\b(url\s$\s["\']?)([^"\')\s]+)(["\']?\s*$)/i',
126	function ($m) use ($resolveUrl) {
127	if ($m[1] !== '') {
128	$resolved = $resolveUrl($m[2]);
129	if ($resolved === null) {
130	return $m[0];
131	}
132	$dataUri = $this->flattenPngTransparency($resolved);
133	return $dataUri !== null ? $m[1] . $dataUri . $m[3] : $m[1] . $resolved . $m[3];
134	}
135	$resolved = $resolveUrl($m[5]);
136	return $resolved !== null
137	? 'url(\'' . str_replace(["\\", "'"], ["\\\\", "\\'"], $resolved) . '\')'
138	: $m[0];
139	},
140	$html
141	);
142
143	return $html;
144	}
145
146	/**
147	* If $path is a PNG with an alpha channel, composite it onto a white
148	* canvas and return a base64 JPEG data URI.
149	*
150	* @param string $path
151	* @return string\|null
152	*/
153	private function flattenPngTransparency(string $path): ?string
154	{
155	if (!function_exists('imagecreatefrompng') \|\| strtolower(pathinfo($path, PATHINFO_EXTENSION)) !== 'png') {
156	return null;
157	}
158
159	$src = @imagecreatefrompng($path);
160	if (!$src) {
161	return null;
162	}
163
164	$w = imagesx($src);
165	$h = imagesy($src);
166
167	$hasAlpha = false;
168	for ($x = 0; $x < $w && !$hasAlpha; $x++) {
169	for ($y = 0; $y < $h && !$hasAlpha; $y++) {
170	if ((imagecolorat($src, $x, $y) >> 24) & 0x7F) {
171	$hasAlpha = true;
172	}
173	}
174	}
175
176	if (!$hasAlpha) {
177	imagedestroy($src);
178	return null;
179	}
180
181	$canvas = imagecreatetruecolor($w, $h);
182	$white = imagecolorallocate($canvas, 255, 255, 255);
183	imagefill($canvas, 0, 0, $white);
184	imagecopy($canvas, $src, 0, 0, 0, 0, $w, $h);
185	imagedestroy($src);
186
187	ob_start();
188	imagejpeg($canvas, null, 92);
189	$jpeg = ob_get_clean();
190	imagedestroy($canvas);
191
192	return 'data:image/jpeg;base64,' . base64_encode($jpeg);
193	}
194	}
195