wpsso / lib / schema-graph.php

schema-graph.php in WPSSO Core – Complete Schema Markup and Meta Tags 22.7.0, at lib/schema-graph.php

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1	<?php
2	/*
3	* License: GPLv3
4	* License URI: https://www.gnu.org/licenses/gpl.txt
5	* Copyright 2012-2026 Jean-Sebastien Morisset (https://wpsso.com/)
6	*/
7
8	if ( ! defined( 'ABSPATH' ) ) {
9
10	die( 'These aren\'t the droids you\'re looking for.' );
11	}
12
13	if ( ! defined( 'WPSSO_PLUGINDIR' ) ) {
14
15	die( 'Do. Or do not. There is no try.' );
16	}
17
18	if ( ! class_exists( 'WpssoSchemaGraph' ) ) {
19
20	class WpssoSchemaGraph {
21
22	private static $graph_context = 'https://schema.org';
23	private static $graph_type = 'graph';
24	private static $graph_data = array();
25
26	public function __construct() {}
27
28	public static function get_type_url() {
29
30	return self::$graph_context . '/' . self::$graph_type;
31	}
32
33	public static function add_data( $data ) {
34
35	static $home_url = null;
36
37	if ( null === $home_url ) { // Optimize and call just once.
38
39	$home_url = untrailingslashit( get_home_url() );
40	}
41
42	if ( empty( $data[ '@id' ] ) ) {
43
44	self::$graph_data[] = $data;
45
46	return true;
47
48	} else {
49
50	$val =& $data[ '@id' ];
51
52	if ( 0 === strpos( $val, $home_url ) ) {
53
54	$val = str_replace( $home_url, '', $val ); // Shorten the @id value, if possible.
55	}
56
57	if ( ! isset( self::$graph_data[ $val ] ) ) { // If not already added.
58
59	if ( count( $data ) > 1 ) { // Ignore arrays with only an @id.
60
61	self::$graph_data[ $val ] = $data;
62
63	return true;
64	}
65	}
66	}
67
68	return false;
69	}
70
71	public static function get_json_reset_data() {
72
73	$json_data = self::get_json();
74
75	self::reset_data();
76
77	return $json_data;
78	}
79
80	public static function get_json() {
81
82	$json_data = array(
83	'@context' => self::$graph_context,
84	'@graph' => array_values( self::$graph_data ), // Exclude the associative array key values.
85	);
86
87	self::clean_json( $json_data );
88
89	return $json_data;
90	}
91
92	public static function reset_data() {
93
94	self::$graph_data = array();
95	}
96
97	/*
98	* Recursively remove null values, empty strings, and empty arrays.
99	*/
100	public static function clean_json( array &$arr ) {
101
102	foreach ( $arr as $key => $value ) {
103
104	if ( null === $value ) { // Null value.
105
106	unset( $arr[ $key ] );
107
108	} elseif ( '' === $value ) { // Empty string.
109
110	unset( $arr[ $key ] );
111
112	} elseif ( array() === $value ) { // Empty array.
113
114	unset( $arr[ $key ] );
115
116	} elseif ( is_array( $value ) ) {
117
118	self::clean_json( $arr[ $key ] );
119	}
120	}
121	}
122
123	public static function optimize_json( array &$json_data ) { // Pass by reference is OK.
124
125	static $optim_data = array();
126	static $recur_level = null;
127	static $id_anchor = null;
128	static $home_url = null;
129
130	if ( isset( $json_data[ '@graph' ] ) ) { // Top level of json.
131
132	$recur_level = 0;
133
134	} elseif ( null !== $recur_level ) {
135
136	$recur_level++;
137	}
138
139	if ( $recur_level > 32 ) { // Just in case.
140
141	return;
142	}
143
144	if ( null === $id_anchor ) { // Optimize and call just once.
145
146	$id_anchor = WpssoSchema::get_id_anchor();
147	}
148
149	if ( null === $home_url ) { // Optimize and call just once.
150
151	$home_url = untrailingslashit( get_home_url() );
152	}
153
154	foreach ( $json_data as $key => &$val ) {
155
156	if ( is_array( $val ) ) {
157
158	self::optimize_json( $val );
159
160	} elseif ( '@id' === $key ) {
161
162	if ( 0 === strpos( $val, $home_url ) ) {
163
164	$val = str_replace( $home_url, '', $val ); // Shorten the @id value, if possible.
165	}
166
167	if ( count( $json_data ) > 1 ) { // Ignore arrays with a single element (ie. the @id property).
168
169	if ( false !== strpos( $val, $id_anchor ) ) { // Only optimize our own @ids.
170
171	if ( empty( $optim_data[ $val ] ) ) {
172
173	$optim_data[ $val ] = $json_data;
174
175	foreach ( $optim_data[ $val ] as $new_key => &$new_val ) {
176
177	if ( is_array( $new_val ) ) {
178
179	self::optimize_json( $new_val );
180	}
181	}
182	}
183
184	$json_data = array( $key => $val );
185	}
186	}
187
188	break;
189	}
190	}
191
192	if ( isset( $json_data[ '@graph' ] ) ) { // Top level of json.
193
194	$merged_graph = array_merge( array_values( $optim_data ), $json_data[ '@graph' ] );
195
196	/*
197	* Reset the static variables after merging the new data.
198	*/
199	$optim_data = array();
200	$recur_level = null;
201
202	/*
203	* Cleanup any empty @id arrays.
204	*/
205	foreach ( $merged_graph as $num => $val ) {
206
207	if ( is_array( $val ) ) { // Just in case.
208
209	if ( ! empty( $val[ '@id' ] ) && 1 === count( $val ) ) {
210
211	unset( $merged_graph[ $num ] );
212	}
213	}
214	}
215
216	$json_data[ '@graph' ] = $merged_graph;
217
218	unset( $merged_graph, $num, $val );
219
220	} elseif ( null !== $recur_level ) {
221
222	$recur_level--;
223	}
224	}
225	}
226	}
227