wp-optimize / webp / class-wp-optimize-webp-images.php

class-wp-optimize-webp-images.php in WP-Optimize – Cache, Compress images, Minify & Clean database to boost page speed & performance 4.7.0, at webp/class-wp-optimize-webp-images.php

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1	<?php
2	if (!defined('ABSPATH')) die('No direct access allowed');
3
4	if (!class_exists('WP_Optimize_WebP_Images')) :
5
6	class WP_Optimize_WebP_Images {
7
8	/**
9	* Constructor
10	*/
11	private function __construct() {
12	add_action('delete_attachment', array($this, 'delete_related_images'));
13	}
14
15	/**
16	* Returns singleton instance
17	*
18	* @return WP_Optimize_WebP_Images
19	*/
20	public static function get_instance(): self {
21	static $instance = null;
22	if (null === $instance) {
23	$instance = new self();
24	}
25	return $instance;
26	}
27
28	/**
29	* Deletes related image sizes and alternate WebP format images
30	*
31	* @param int $attachment_id
32	* @return void
33	*/
34	public function delete_related_images($attachment_id): void {
35	$meta = wp_get_attachment_metadata($attachment_id);
36	if (false === $meta) {
37	return;
38	}
39
40	$file_path = get_attached_file($attachment_id);
41	if (false === $file_path) {
42	return;
43	}
44	$file_info = pathinfo($file_path);
45	$directory = $this->get_upload_directory($file_info['basename'], $meta);
46	$filename = $file_info['filename'];
47	$original_extension = '.' . ($file_info['extension'] ?? '');
48	$sizes = empty($meta['sizes']) ? array() : $meta['sizes'];
49
50	$images = $this->build_image_paths(
51	$directory,
52	$filename,
53	$original_extension,
54	$sizes
55	);
56
57	$this->delete_files($images);
58	}
59
60	/**
61	* Computes the upload directory path for the attachment
62	*
63	* @param string $basename The original file basename
64	* @param array<string, int\|string\|array<string, array<string, string>>> $meta The attachment metadata
65	* @return string
66	*/
67	private function get_upload_directory($basename, $meta): string {
68	$file = isset($meta['file']) && is_string($meta['file']) ? $meta['file'] : '';
69	$sub_directory = '';
70	if ('' !== $file) {
71	$sub_directory = str_replace($basename, '', $file);
72	}
73
74	$uploads = wp_get_upload_dir();
75	return $uploads['basedir'] . '/' . $sub_directory;
76	}
77
78	/**
79	* Builds a list of image file paths to delete, including both
80	* original size variants and their WebP counterparts
81	*
82	* @param string $directory Upload directory path
83	* @param string $filename Image filename without extension
84	* @param string $original_extension Original file extension with leading dot
85	* @param array<string, array<string, string>> $sizes Registered image size definitions
86	* @return array<string> List of absolute file paths
87	*/
88	private function build_image_paths($directory, $filename, $original_extension, $sizes) {
89	$webp_extension = '.webp';
90	$images = array(
91	$directory . $filename . $original_extension . $webp_extension,
92	);
93
94	$unscaled_filename = preg_replace('/-scaled$/', '', $filename);
95
96	foreach ($sizes as $size) {
97	$size_suffix = '-' . $size['width'] . 'x' . $size['height'];
98	$images[] = $directory . $filename . $size_suffix . $original_extension;
99	$images[] = $directory . $unscaled_filename . $size_suffix . $original_extension . $webp_extension;
100	}
101
102	return $images;
103	}
104
105	/**
106	* Deletes the given list of files from disk
107	*
108	* @param array<string> $files List of absolute file paths to delete
109	* @return void
110	*/
111	private function delete_files($files): void {
112	foreach ($files as $file) {
113	wp_delete_file($file);
114	}
115	}
116	}
117
118	endif;
119