thinkrank / includes / core / class-asset-optimizer.php

class-asset-optimizer.php in ThinkRank AI SEO – AI SEO Plugin for WordPress: Schema, XML Sitemaps, Meta Tags, Search Console & Local SEO trunk, at includes/core/class-asset-optimizer.php

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1	<?php
2	/**
3	* Asset Optimizer Class
4	*
5	* Simple asset optimization for better performance.
6	* Implements preloading and basic optimization strategies.
7	*
8	* @package ThinkRank
9	* @subpackage Core
10	* @since 1.0.0
11	*/
12
13	declare(strict_types=1);
14
15	namespace ThinkRank\Core;
16
17	// Prevent direct access.
18	if ( ! defined( 'ABSPATH' ) ) {
19	exit;
20	}
21
22	/**
23	* Asset Optimizer Class
24	*
25	* @since 1.0.0
26	*/
27	class Asset_Optimizer {
28
29	/**
30	* Initialize asset optimization
31	*
32	* @since 1.0.0
33	*/
34	public function __construct() {
35	add_action('admin_init', [$this, 'init_admin_optimizations']);
36	}
37
38	/**
39	* Initialize admin-specific optimizations
40	*
41	* @since 1.0.0
42	*/
43	public function init_admin_optimizations(): void {
44	// Only optimize on ThinkRank admin pages
45	if (!$this->is_thinkrank_admin_page()) {
46	return;
47	}
48
49	add_action('admin_head', [$this, 'add_asset_preloading'], 1);
50	add_action('admin_head', [$this, 'add_performance_hints'], 2);
51	}
52
53	/**
54	* Check if current page is a ThinkRank admin page
55	*
56	* @since 1.0.0
57	*
58	* @return bool True if ThinkRank admin page
59	*/
60	private function is_thinkrank_admin_page(): bool {
61	$screen = get_current_screen();
62
63	if (!$screen) {
64	return false;
65	}
66
67	// Check for ThinkRank admin pages
68	// phpcs:ignore WordPress.Security.NonceVerification.Recommended -- Reading page parameter for screen detection, not processing form data.
69	return strpos($screen->id, 'thinkrank') !== false \|\|
70	strpos($screen->base, 'thinkrank') !== false \|\|
71	(isset($_GET['page']) && strpos(sanitize_text_field(wp_unslash($_GET['page'])), 'thinkrank') !== false); // phpcs:ignore WordPress.Security.NonceVerification.Recommended
72	}
73
74	/**
75	* Add asset preloading headers
76	*
77	* @since 1.0.0
78	*/
79	public function add_asset_preloading(): void {
80	$plugin_url = plugin_dir_url(THINKRANK_PLUGIN_FILE);
81
82	$assets = [
83	// Critical CSS
84	[
85	'url' => $plugin_url . 'assets/admin.css',
86	'type' => 'style'
87	],
88	// Critical JS
89	[
90	'url' => $plugin_url . 'assets/admin.js',
91	'type' => 'script'
92	]
93	];
94
95	foreach ($assets as $asset) {
96	// Check if file exists before preloading
97	$file_path = str_replace($plugin_url, THINKRANK_PLUGIN_DIR, $asset['url']);
98	if (file_exists($file_path)) {
99	printf(
100	'<link rel="preload" href="%s" as="%s"%s>' . "\n",
101	esc_url($asset['url']),
102	esc_attr($asset['type']),
103	$asset['type'] === 'style' ? ' type="text/css"' : ''
104	);
105	}
106	}
107	}
108
109	/**
110	* Add performance hints
111	*
112	* @since 1.0.0
113	*/
114	public function add_performance_hints(): void {
115	// DNS prefetch for external APIs (if configured)
116	$external_domains = [
117	'api.openai.com',
118	'api.anthropic.com',
119	'generativelanguage.googleapis.com'
120	];
121
122	foreach ($external_domains as $domain) {
123	printf('<link rel="dns-prefetch" href="//%s">' . "\n", esc_attr($domain));
124	}
125
126	// Remove redundant viewport meta tag: WordPress admin already sets this.
127	// Keeping only DNS prefetch hints here.
128	}
129
130	/**
131	* Get asset optimization stats
132	*
133	* @since 1.0.0
134	*
135	* @return array Optimization statistics
136	*/
137	public function get_stats(): array {
138	return [
139	'preloading_enabled' => $this->is_thinkrank_admin_page(),
140	'dns_prefetch_domains' => 3,
141	'optimized_pages' => ['thinkrank admin pages']
142	];
143	}
144	}
145