<?php



#[AllowDynamicProperties]
class WP_Metadata_Lazyloader {
	
	protected $pending_objects;

	
	protected $settings = array();

	
	public function __construct() {
		$this->settings = array(
			'term'    => array(
				'filter'   => 'get_term_metadata',
				'callback' => array( $this, 'lazyload_meta_callback' ),
			),
			'comment' => array(
				'filter'   => 'get_comment_metadata',
				'callback' => array( $this, 'lazyload_meta_callback' ),
			),
			'blog'    => array(
				'filter'   => 'get_blog_metadata',
				'callback' => array( $this, 'lazyload_meta_callback' ),
			),
		);
	}

	
	public function queue_objects( $object_type, $object_ids ) {
		if ( ! isset( $this->settings[ $object_type ] ) ) {
			return new WP_Error( 'invalid_object_type', __( 'Invalid object type.' ) );
		}

		$type_settings = $this->settings[ $object_type ];

		if ( ! isset( $this->pending_objects[ $object_type ] ) ) {
			$this->pending_objects[ $object_type ] = array();
		}

		foreach ( $object_ids as $object_id ) {
			// Keyed by ID for faster lookup.
			if ( ! isset( $this->pending_objects[ $object_type ][ $object_id ] ) ) {
				$this->pending_objects[ $object_type ][ $object_id ] = 1;
			}
		}

		add_filter( $type_settings['filter'], $type_settings['callback'], 10, 5 );

		
		do_action( 'metadata_lazyloader_queued_objects', $object_ids, $object_type, $this );
	}

	
	public function reset_queue( $object_type ) {
		if ( ! isset( $this->settings[ $object_type ] ) ) {
			return new WP_Error( 'invalid_object_type', __( 'Invalid object type.' ) );
		}

		$type_settings = $this->settings[ $object_type ];

		$this->pending_objects[ $object_type ] = array();
		remove_filter( $type_settings['filter'], $type_settings['callback'] );
	}

	
	public function lazyload_term_meta( $check ) {
		_deprecated_function( __METHOD__, '6.3.0', 'WP_Metadata_Lazyloader::lazyload_meta_callback' );
		return $this->lazyload_meta_callback( $check, 0, '', false, 'term' );
	}

	
	public function lazyload_comment_meta( $check ) {
		_deprecated_function( __METHOD__, '6.3.0', 'WP_Metadata_Lazyloader::lazyload_meta_callback' );
		return $this->lazyload_meta_callback( $check, 0, '', false, 'comment' );
	}

	
	public function lazyload_meta_callback( $check, $object_id, $meta_key, $single, $meta_type ) {
		if ( empty( $this->pending_objects[ $meta_type ] ) ) {
			return $check;
		}

		$object_ids = array_keys( $this->pending_objects[ $meta_type ] );
		if ( $object_id && ! in_array( $object_id, $object_ids, true ) ) {
			$object_ids[] = $object_id;
		}

		update_meta_cache( $meta_type, $object_ids );

		// No need to run again for this set of objects.
		$this->reset_queue( $meta_type );

		return $check;
	}
}