gutenberg / lib / experimental / interactivity-api / class-wp-interactivity-initial-state.php

class-wp-interactivity-initial-state.php in Gutenberg 17.5.0, at lib/experimental/interactivity-api/class-wp-interactivity-initial-state.php

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1	<?php
2	/**
3	* WP_Interactivity_Initial_State class
4	*
5	* @package Gutenberg
6	* @subpackage Interactivity API
7	*/
8
9	if ( class_exists( 'WP_Interactivity_Initial_State' ) ) {
10	return;
11	}
12
13	/**
14	* Manages the initial state of the Interactivity API store in the server and
15	* its serialization so it can be restored in the browser upon hydration.
16	*
17	* @package Gutenberg
18	* @subpackage Interactivity API
19	*/
20	class WP_Interactivity_Initial_State {
21	/**
22	* Map of initial state by namespace.
23	*
24	* @var array
25	*/
26	private static $initial_state = array();
27
28	/**
29	* Get state from a given namespace.
30	*
31	* @param string $store_ns Namespace.
32	*
33	* @return array The requested state.
34	*/
35	public static function get_state( $store_ns ) {
36	return self::$initial_state[ $store_ns ] ?? array();
37	}
38
39	/**
40	* Merge data into the state with the given namespace.
41	*
42	* @param string $store_ns Namespace.
43	* @param array $data State to merge.
44	*
45	* @return void
46	*/
47	public static function merge_state( $store_ns, $data ) {
48	self::$initial_state[ $store_ns ] = array_replace_recursive(
49	self::get_state( $store_ns ),
50	$data
51	);
52	}
53
54	/**
55	* Get store data.
56	*
57	* @return array
58	*/
59	public static function get_data() {
60	return self::$initial_state;
61	}
62
63	/**
64	* Reset the initial state.
65	*/
66	public static function reset() {
67	self::$initial_state = array();
68	}
69
70	/**
71	* Render the initial state.
72	*/
73	public static function render() {
74	if ( empty( self::$initial_state ) ) {
75	return;
76	}
77	echo sprintf(
78	'<script id="wp-interactivity-initial-state" type="application/json">%s</script>',
79	wp_json_encode( self::$initial_state, JSON_HEX_TAG \| JSON_HEX_AMP )
80	);
81	}
82	}
83