@type string|null $icon Block type icon. * @type string $description A detailed block type description. * @type array $keywords Additional keywords to produce block type as * result in search interfaces. * @type string|null $textdomain The translation textdomain. * @type array $styles Alternative block styles. * @type array $variations Block variations. * @type array|null $supports Supported features. * @type array|null $example Structured data for the block preview. * @type callable|null $render_callback Block type render callback. * @type array|null $attributes Block type attributes property schemas. * @type array $uses_context Context values inherited by blocks of this type. * @type array|null $provides_context Context provided by blocks of this type. * @type string|null $editor_script Block type editor script handle. * @type string|null $script Block type front end script handle. * @type string|null $editor_style Block type editor style handle. * @type string|null $style Block type front end style handle. * } */ public function __construct( $block_type, $args = array() ) { $this->name = $block_type; $this->set_props( $args ); } /** * Renders the block type output for given attributes. * * @since 5.0.0 * * @param array $attributes Optional. Block attributes. Default empty array. * @param string $content Optional. Block content. Default empty string. * @return string Rendered block type output. */ public function render( $attributes = array(), $content = '' ) { if ( ! $this->is_dynamic() ) { return ''; } $attributes = $this->prepare_attributes_for_render( $attributes ); return (string) call_user_func( $this->render_callback, $attributes, $content ); } /** * Returns true if the block type is dynamic, or false otherwise. A dynamic * block is one which defers its rendering to occur on-demand at runtime. * * @since 5.0.0 * * @return bool Whether block type is dynamic. */ public function is_dynamic() { return is_callable( $this->render_callback ); } /** * Validates attributes against the current block schema, populating * defaulted and missing values. * * @since 5.0.0 * * @param array $attributes Original block attributes. * @return array Prepared block attributes. */ public function prepare_attributes_for_render( $attributes ) { // If there are no attribute definitions for the block type, skip // processing and return verbatim. if ( ! isset( $this->attributes ) ) { return $attributes; } foreach ( $attributes as $attribute_name => $value ) { // If the attribute is not defined by the block type, it cannot be // validated. if ( ! isset( $this->attributes[ $attribute_name ] ) ) { continue; } $schema = $this->attributes[ $attribute_name ]; // Validate value by JSON schema. An invalid value should revert to // its default, if one exists. This occurs by virtue of the missing // attributes loop immediately following. If there is not a default // assigned, the attribute value should remain unset. $is_valid = rest_validate_value_from_schema( $value, $schema, $attribute_name ); if ( is_wp_error( $is_valid ) ) { unset( $attributes[ $attribute_name ] ); } } // Populate values of any missing attributes for which the block type // defines a default. $missing_schema_attributes = array_diff_key( $this->attributes, $attributes ); foreach ( $missing_schema_attributes as $attribute_name => $schema ) { if ( isset( $schema['default'] ) ) { $attributes[ $attribute_name ] = $schema['default']; } } return $attributes; } /** * Sets block type properties. * * @since 5.0.0 * * @param array|string $args Array or string of arguments for registering a block type. * See WP_Block_Type::__construct() for information on accepted arguments. */ public function set_props( $args ) { $args = wp_parse_args( $args, array( 'render_callback' => null, ) ); $args['name'] = $this->name; /** * Filters the arguments for registering a block type. * * @since 5.5.0 * * @param array $args Array of arguments for registering a block type. * @param string $block_type Block type name including namespace. */ $args = apply_filters( 'register_block_type_args', $args, $this->name ); foreach ( $args as $property_name => $property_value ) { $this->$property_name = $property_value; } } /** * Get all available block attributes including possible layout attribute from Columns block. * * @since 5.0.0 * * @return array Array of attributes. */ public function get_attributes() { return is_array( $this->attributes ) ? $this->attributes : array(); } }