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 3.2.21, at webp/class-wp-optimize-webp-images.php

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1	<?php
2	if (!defined('WPO_VERSION')) die('No direct access allowed');
3
4	if (!class_exists('WP_Optimize_WebP_Images')) :
5
6	class WP_Optimize_WebP_Images {
7
8	private $directory = '';
9
10	private $filename = '';
11
12	private $original_extension = '';
13
14	private $webp_extension = '.webp';
15
16	private $meta = false;
17
18	private $sizes = array();
19
20	private $images = array();
21
22	/**
23	* Constructor
24	*/
25	private function __construct() {
26	add_action('delete_attachment', array($this, 'delete_related_images'), 10, 1);
27	}
28
29	/**
30	* Returns singleton instance
31	*
32	* @return WP_Optimize_WebP_Images
33	*/
34	public static function get_instance() {
35	static $instance = null;
36	if (null === $instance) {
37	$instance = new WP_Optimize_WebP_Images();
38	}
39	return $instance;
40	}
41
42	/**
43	* Deletes related image sizes and alternate webp format images
44	*
45	* @param int $attachment_id
46	* @return void
47	*/
48	public function delete_related_images($attachment_id) {
49	$this->set_meta($attachment_id);
50	$this->set_file_info_properties($attachment_id);
51	$this->set_sizes();
52	$this->set_images();
53	$this->delete_images();
54	$this->reset();
55	}
56
57	/**
58	* Sets meta property with attachment metadata
59	*
60	* @param int $attachment_id
61	* @return void
62	*/
63	private function set_meta($attachment_id) {
64	$this->meta = wp_get_attachment_metadata($attachment_id);
65	}
66
67	/**
68	* Sets file information properties
69	*
70	* @param int $attachment_id
71	* @return void
72	*/
73	private function set_file_info_properties($attachment_id) {
74	$file_path = get_attached_file($attachment_id);
75	$file_path_info = pathinfo($file_path);
76	$this->filename = $file_path_info['filename'];
77	$this->original_extension = '.' . $file_path_info['extension'];
78
79	$file = isset($this->meta['file']) ? $this->meta['file'] : '';
80	$basename = $file_path_info['basename'];
81	$sub_directory = '';
82	if (!empty($file)) {
83	$sub_directory = str_replace($basename, '', $file);
84	}
85
86	$uploads = wp_get_upload_dir();
87	$this->directory = $uploads['basedir'] . '/' . $sub_directory;
88	}
89
90	/**
91	* Returns all available image sizes for the given attachment id
92	*/
93	private function set_sizes() {
94	if (false !== $this->meta) {
95	$this->sizes = isset($this->meta['sizes']) ? $this->meta['sizes'] : array();
96	}
97	}
98
99	/**
100	* Sets images property
101	*
102	* @return void
103	*/
104	private function set_images() {
105	$webp_format = $this->directory . $this->filename . $this->original_extension . $this->webp_extension;
106	$this->images[] = $webp_format;
107
108	foreach ($this->sizes as $size) {
109	$original_format = $this->directory . $this->filename . '-' . $size['width'] . 'x' . $size['height'] . $this->original_extension;
110	$this->images[] = $original_format;
111	$webp_format = $this->directory . preg_replace('/-scaled$/', '', $this->filename) . '-' . $size['width'] . 'x' . $size['height'] . $this->original_extension . $this->webp_extension;
112	$this->images[] = $webp_format;
113	}
114
115	}
116
117	/**
118	* Delete related images
119	*
120	* @return void
121	*/
122	private function delete_images() {
123	foreach ($this->images as $image) {
124	wp_delete_file($image);
125	}
126	}
127
128	/**
129	* Reset class property values
130	*/
131	private function reset() {
132	$this->directory = '';
133	$this->filename = '';
134	$this->original_extension = '';
135	$this->meta = false;
136	$this->sizes = array();
137	$this->images = array();
138	}
139	}
140
141	endif;
142