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<?php
/**
* Blocks API: WP_Block_Type_Registry class
*
* @package WordPress
* @subpackage Blocks
* @since 5.0.0
*/
/**
* Core class used for interacting with block types.
*
* @since 5.0.0
*/
final class WP_Block_Type_Registry {
/**
* Registered block types, as `$name => $instance` pairs.
*
* @since 5.0.0
* @var WP_Block_Type[]
*/
private $registered_block_types = array();
/**
* Container for the main instance of the class.
*
* @since 5.0.0
* @var WP_Block_Type_Registry|null
*/
private static $instance = null;
/**
* Registers a block type.
*
* @since 5.0.0
*
* @param string|WP_Block_Type $name Block type name including namespace, or alternatively a
* complete WP_Block_Type instance. In case a WP_Block_Type
* is provided, the $args parameter will be ignored.
* @param array $args {
* Optional. Array of block type arguments. Any arguments may be defined, however the
* ones described below are supported by default. Default empty array.
*
* @type callable $render_callback Callback used to render blocks of this block type.
* @type array $attributes Block attributes mapping, property name to schema.
* }
* @return WP_Block_Type|false The registered block type on success, or false on failure.
*/
public function register( $name, $args = array() ) {
$block_type = null;
if ( $name instanceof WP_Block_Type ) {
$block_type = $name;
$name = $block_type->name;
}
if ( ! is_string( $name ) ) {
$message = __( 'Block type names must be strings.' );
_doing_it_wrong( __METHOD__, $message, '5.0.0' );
return false;
}
if ( preg_match( '/[A-Z]+/', $name ) ) {
$message = __( 'Block type names must not contain uppercase characters.' );
_doing_it_wrong( __METHOD__, $message, '5.0.0' );
return false;
}
$name_matcher = '/^[a-z0-9-]+\/[a-z0-9-]+$/';
if ( ! preg_match( $name_matcher, $name ) ) {
$message = __( 'Block type names must contain a namespace prefix. Example: my-plugin/my-custom-block-type' );
_doing_it_wrong( __METHOD__, $message, '5.0.0' );
return false;
}
if ( $this->is_registered( $name ) ) {
/* translators: %s: block name */
$message = sprintf( __( 'Block type "%s" is already registered.' ), $name );
_doing_it_wrong( __METHOD__, $message, '5.0.0' );
return false;
}
if ( ! $block_type ) {
$block_type = new WP_Block_Type( $name, $args );
}
$this->registered_block_types[ $name ] = $block_type;
return $block_type;
}
/**
* Unregisters a block type.
*
* @since 5.0.0
*
* @param string|WP_Block_Type $name Block type name including namespace, or alternatively a
* complete WP_Block_Type instance.
* @return WP_Block_Type|false The unregistered block type on success, or false on failure.
*/
public function unregister( $name ) {
if ( $name instanceof WP_Block_Type ) {
$name = $name->name;
}
if ( ! $this->is_registered( $name ) ) {
/* translators: %s: block name */
$message = sprintf( __( 'Block type "%s" is not registered.' ), $name );
_doing_it_wrong( __METHOD__, $message, '5.0.0' );
return false;
}
$unregistered_block_type = $this->registered_block_types[ $name ];
unset( $this->registered_block_types[ $name ] );
return $unregistered_block_type;
}
/**
* Retrieves a registered block type.
*
* @since 5.0.0
*
* @param string $name Block type name including namespace.
* @return WP_Block_Type|null The registered block type, or null if it is not registered.
*/
public function get_registered( $name ) {
if ( ! $this->is_registered( $name ) ) {
return null;
}
return $this->registered_block_types[ $name ];
}
/**
* Retrieves all registered block types.
*
* @since 5.0.0
*
* @return WP_Block_Type[] Associative array of `$block_type_name => $block_type` pairs.
*/
public function get_all_registered() {
return $this->registered_block_types;
}
/**
* Checks if a block type is registered.
*
* @since 5.0.0
*
* @param string $name Block type name including namespace.
* @return bool True if the block type is registered, false otherwise.
*/
public function is_registered( $name ) {
return isset( $this->registered_block_types[ $name ] );
}
/**
* Utility method to retrieve the main instance of the class.
*
* The instance will be created if it does not exist yet.
*
* @since 5.0.0
*
* @return WP_Block_Type_Registry The main instance.
*/
public static function get_instance() {
if ( null === self::$instance ) {
self::$instance = new self();
}
return self::$instance;
}
}
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