booking / includes / _front_end / class-fe-inline-css-js.php

class-fe-inline-css-js.php in Booking Calendar 11.8.1, at includes/_front_end/class-fe-inline-css-js.php

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1	<?php
2	/**
3	* Minimal Inline Assets Printer (NO wp_head/wp_footer hooks)
4	*
5	* - Prints <style>/<script> immediately where you call it.
6	* - Optional de-dupe by $key (so the same payload is printed only once per request).
7	*
8	* IMPORTANT:
9	* This is NOT “Elementor-safe” by design. It outputs inline tags at the call site.
10	*
11	* @file: includes/_front_end/class-fe-inline-css-js.php
12	* @package Booking Calendar
13	* @since 11.0.x
14	*/
15
16	if ( ! defined( 'ABSPATH' ) ) {
17	exit;
18	}
19
20	class WPBC_FE_Assets {
21
22	const CSS_TAG_ID_BASE = 'wpbc-inline-css';
23	const JS_TAG_ID_BASE = 'wpbc-inline-js';
24
25	/** @var array */
26	protected static $printed_css = array();
27
28	/** @var array */
29	protected static $printed_js = array();
30
31	// ------------------------------------------------------------------------------------------------
32	// == CSS ==
33	// ------------------------------------------------------------------------------------------------
34
35	/**
36	* Print inline CSS immediately (deduped by key).
37	*
38	* @param string $css
39	* @param string $key Unique key to prevent duplicate output. If empty, derived from content hash.
40	*
41	* @return void
42	*/
43	public static function add_inline_css( $css, $key = '' ) {
44
45	$css = is_scalar( $css ) ? trim( (string) $css ) : '';
46	if ( '' === $css ) {
47	return;
48	}
49
50	$key = self::normalize_key( $key, $css, 'css' );
51	if ( isset( self::$printed_css[ $key ] ) ) {
52	return;
53	}
54	self::$printed_css[ $key ] = true;
55
56	$id = self::safe_dom_id( self::CSS_TAG_ID_BASE . '-' . $key );
57
58	// phpcs:ignore WordPress.Security.EscapeOutput.OutputNotEscaped
59	return "\n" . '<style id="' . esc_attr( $id ) . '">' . "\n" . $css . "\n" . '</style>' . "\n";
60
61	// wp_add_inline_style( $id, $css ); ???
62	}
63
64	/**
65	* Add inline CSS via WP style handle (Elementor-safe).
66	* Avoids printing <style> tags inside content.
67	*
68	* @param string $handle Style handle (e.g. 'wpbc-ui-both').
69	* @param string $css CSS text.
70	* @param string $key Dedupe key (optional).
71	*
72	* @return bool True if added / already added, false if not possible.
73	*/
74	public static function add_inline_css_to_wp_style( $handle, $css, $key = '' ) {
75	// FixIn: 10.14.14.1.
76	$handle = is_scalar( $handle ) ? trim( (string) $handle ) : '';
77	$css = is_scalar( $css ) ? trim( (string) $css ) : '';
78
79	if ( '' === $handle \|\| '' === $css ) {
80	return false;
81	}
82
83	if ( ! function_exists( 'wp_add_inline_style' ) ) {
84	return false;
85	}
86
87	// Handle must exist in WP styles system.
88	if ( ! wp_style_is( $handle, 'enqueued' ) && ! wp_style_is( $handle, 'done' ) && ! wp_style_is( $handle, 'registered' ) ) {
89	return false;
90	}
91
92	$key = self::normalize_key( $key, $css, 'css' );
93	if ( isset( self::$printed_css[ $key ] ) ) {
94	return true;
95	}
96	self::$printed_css[ $key ] = true;
97
98	wp_add_inline_style( $handle, $css );
99
100	return true;
101	}
102
103	// ------------------------------------------------------------------------------------------------
104	// == JS ==
105	// ------------------------------------------------------------------------------------------------
106
107	/**
108	* Print inline JS immediately (deduped by key). -- Usually it is - Fallback to direct inline JS, if previosly not added script via: add_jq_ready_js_to_wp_script.
109	*
110	* @param string $js
111	* @param string $key Unique key to prevent duplicate output. If empty, derived from content hash.
112	*
113	* @return void
114	*/
115	public static function add_inline_js( $js, $key = '' ) {
116
117	$js = is_scalar( $js ) ? trim( (string) $js ) : '';
118	if ( '' === $js ) {
119	return;
120	}
121
122	$key = self::normalize_key( $key, $js, 'js' );
123	if ( isset( self::$printed_js[ $key ] ) ) {
124	return;
125	}
126	self::$printed_js[ $key ] = true;
127
128	$id = self::safe_dom_id( self::JS_TAG_ID_BASE . '-' . $key );
129
130
131	// phpcs:ignore WordPress.Security.EscapeOutput.OutputNotEscaped
132	return "\n" . '<script id="' . esc_attr( $id ) . '" type="text/javascript">' . "\n" . $js . "\n" . '</script>' . "\n";
133	}
134
135
136	// FixIn: 10.14.13.2. // FixIn: 10.14.17.2.
137	/**
138	* Add JS (wrapped in jQuery ready) as WP inline script after a registered/enqueued handle. (Elementor-safe)
139	* This avoids <script> tags in content (Elementor-safe).
140	*
141	* @param string $handle Script handle (e.g. 'wpbc-main-client' or 'wpbc_all').
142	* @param string $js_body JS without <script> and without ready wrapper.
143	* @param string $key Dedupe key (optional).
144	*
145	* @return bool True if added, false if not possible.
146	*/
147	public static function add_jq_ready_js_to_wp_script( $handle, $js_body, $key = '' ) {
148
149	$handle = is_scalar( $handle ) ? trim( (string) $handle ) : '';
150	$js_body = is_scalar( $js_body ) ? trim( (string) $js_body ) : '';
151
152	if ( '' === $handle \|\| '' === $js_body ) {
153	return false;
154	}
155
156	// One Exception to Ensure enqueue script - 'wpbc_all'! // FixIn: 10.14.17.2.
157	if ( 'wpbc_all' === $handle ) {
158	// 1) Ensure the handle exists in WP_Scripts now (register if needed).
159	if ( ! wp_script_is( 'wpbc_all', 'registered' ) && function_exists( 'wp_register_script' ) ) {
160	wp_enqueue_script( 'wpbc_all', wpbc_plugin_url( '/_dist/all/_out/wpbc_all.js' ), array( 'jquery' ), WP_BK_VERSION_NUM, array( 'in_footer' => WPBC_JS_IN_FOOTER ) );
161	}
162
163	// 2) Enqueue it (safe even if it will be enqueued later anyway).
164	if ( function_exists( 'wp_enqueue_script' ) ) {
165	wp_enqueue_script( 'wpbc_all' );
166	}
167	}
168
169
170	// Only if WP script API is available and the handle is in play.
171	if ( ! function_exists( 'wp_add_inline_script' ) ) {
172	return false;
173	}
174	if ( ! wp_script_is( $handle, 'enqueued' ) && ! wp_script_is( $handle, 'done' ) && ! wp_script_is( $handle, 'registered' ) ) {
175	return false;
176	}
177
178	if ( ';' !== substr( $js_body, - 1 ) ) {
179	$js_body .= ';';
180	}
181
182	$js = wpbc_jq_ready_start() . "\n" . $js_body . "\n" . wpbc_jq_ready_end();
183
184	$key = self::normalize_key( $key, $js, 'js' );
185	if ( isset( self::$printed_js[ $key ] ) ) {
186	return true;
187	}
188	self::$printed_js[ $key ] = true;
189
190	wp_add_inline_script( $handle, $js, 'after' );
191
192	return true;
193	}
194
195	// ------------------------------------------------------------------------------------------------
196	// Internals
197	// ------------------------------------------------------------------------------------------------
198
199	/**
200	* Normalize de-dupe key. If empty, use deterministic hash from content.
201	*
202	* @param string $key
203	* @param string $content
204	* @param string $type 'css'\|'js'
205	*
206	* @return string
207	*/
208	protected static function normalize_key( $key, $content, $type ) {
209
210	$key = is_scalar( $key ) ? trim( (string) $key ) : '';
211	if ( '' !== $key ) {
212	return $key;
213	}
214
215	return (string) $type . '-' . md5( (string) $content );
216	}
217
218	/**
219	* Make a safe DOM id (ASCII, simple).
220	*
221	* @param string $id
222	*
223	* @return string
224	*/
225	protected static function safe_dom_id( $id ) {
226
227	$id = strtolower( (string) $id );
228	$id = preg_replace( '/[^a-z0-9\-\_]+/', '-', $id );
229	$id = trim( $id, '-' );
230
231	// Prevent extremely long ids.
232	if ( strlen( $id ) > 80 ) {
233	$id = substr( $id, 0, 80 );
234	}
235
236	if ( '' === $id ) {
237	$id = 'wpbc-inline';
238	}
239
240	return $id;
241	}
242	}
243