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<?php
/**
* Post Meta source for the block bindings.
*
* @since 6.5.0
* @package WordPress
* @subpackage Block Bindings
*/
/**
* Gets value for Post Meta source.
*
* @since 6.5.0
* @access private
*
* @param array $source_args Array containing source arguments used to look up the override value.
* Example: array( "key" => "foo" ).
* @param WP_Block $block_instance The block instance.
* @return mixed The value computed for the source.
*/
function _block_bindings_post_meta_get_value( array $source_args, $block_instance ) {
if ( empty( $source_args['key'] ) ) {
return null;
}
if ( empty( $block_instance->context['postId'] ) ) {
return null;
}
$post_id = $block_instance->context['postId'];
// If a post isn't public, we need to prevent unauthorized users from accessing the post meta.
$post = get_post( $post_id );
if ( ( ! is_post_publicly_viewable( $post ) && ! current_user_can( 'read_post', $post_id ) ) || post_password_required( $post ) ) {
return null;
}
// Check if the meta field is protected.
if ( is_protected_meta( $source_args['key'], 'post' ) ) {
return null;
}
// Check if the meta field is registered to be shown in REST.
$meta_keys = get_registered_meta_keys( 'post', $block_instance->context['postType'] );
// Add fields registered for all subtypes.
$meta_keys = array_merge( $meta_keys, get_registered_meta_keys( 'post', '' ) );
if ( empty( $meta_keys[ $source_args['key'] ]['show_in_rest'] ) ) {
return null;
}
return get_post_meta( $post_id, $source_args['key'], true );
}
/**
* Registers Post Meta source in the block bindings registry.
*
* @since 6.5.0
* @access private
*/
function _register_block_bindings_post_meta_source() {
register_block_bindings_source(
'core/post-meta',
array(
'label' => _x( 'Post Meta', 'block bindings source' ),
'get_value_callback' => '_block_bindings_post_meta_get_value',
'uses_context' => array( 'postId', 'postType' ),
)
);
}
add_action( 'init', '_register_block_bindings_post_meta_source' );