WP_Interactivity_API

15final class WP_Interactivity_API {16	/**17	 * Holds the mapping of directive attribute names to their processor methods.18	 *19	 * @since 6.5.020	 * @var array<string, string>21	 * @phpstan-var array{22	 *     'data-wp-interactive': 'data_wp_interactive_processor',23	 *     'data-wp-router-region': 'data_wp_router_region_processor',24	 *     'data-wp-context': 'data_wp_context_processor',25	 *     'data-wp-bind': 'data_wp_bind_processor',26	 *     'data-wp-class': 'data_wp_class_processor',27	 *     'data-wp-style': 'data_wp_style_processor',28	 *     'data-wp-text': 'data_wp_text_processor',29	 *     'data-wp-each': 'data_wp_each_processor',30	 * }31	 */32	private static array $directive_processors = array(33		'data-wp-interactive'   => 'data_wp_interactive_processor',34		'data-wp-router-region' => 'data_wp_router_region_processor',35		'data-wp-context'       => 'data_wp_context_processor',36		'data-wp-bind'          => 'data_wp_bind_processor',37		'data-wp-class'         => 'data_wp_class_processor',38		'data-wp-style'         => 'data_wp_style_processor',39		'data-wp-text'          => 'data_wp_text_processor',40		/*41		 * `data-wp-each` needs to be processed in the last place because it moves42		 * the cursor to the end of the processed items to prevent them to be43		 * processed twice.44		 */45		'data-wp-each'          => 'data_wp_each_processor',46	);47 48	/**49	 * Holds the initial state of the different Interactivity API stores.50	 *51	 * This state is used during the server directive processing. Then, it is52	 * serialized and sent to the client as part of the interactivity data to be53	 * recovered during the hydration of the client interactivity stores.54	 *55	 * @since 6.5.056	 * @var array57	 */58	private $state_data = array();59 60	/**61	 * Holds the configuration required by the different Interactivity API stores.62	 *63	 * This configuration is serialized and sent to the client as part of the64	 * interactivity data and can be accessed by the client interactivity stores.65	 *66	 * @since 6.5.067	 * @var array68	 */69	private $config_data = array();70 71	/**72	 * Keeps track of all derived state closures accessed during server-side rendering.73	 *74	 * This data is serialized and sent to the client as part of the interactivity75	 * data, and is handled later in the client to support derived state props that76	 * are lazily hydrated.77	 *78	 * @since 6.9.079	 * @var array80	 */81	private $derived_state_closures = array();82 83	/**84	 * Flag that indicates whether the `data-wp-router-region` directive has85	 * been found in the HTML and processed.86	 *87	 * The value is saved in a private property of the WP_Interactivity_API88	 * instance instead of using a static variable inside the processor89	 * function, which would hold the same value for all instances90	 * independently of whether they have processed any91	 * `data-wp-router-region` directive or not.92	 *93	 * @since 6.5.094	 * @var bool