Ticket #49615: 49615-filter-register-block-type.diff

src/wp-includes/class-wp-block-type.php

@@ -185 +185 @@
 
                 $args['name'] = $this->name;
 
+                /**
+                 * Filters the arguments for registering a block type.
+                 *
+                 * @since 5.5.0
+                 *
+                 * @param array  $args       Array of arguments for 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;
                 }

tests/phpunit/tests/blocks/register.php

@@ -138 +138 @@
                 $content = file_get_contents( DIR_TESTDATA . '/blocks/do-blocks-expected.html' );
                 $this->assertFalse( has_blocks( $content ) );
         }
+
+        /**
+         * @ticket 49615
+         */
+        public function test_filter_block_registration() {
+                $filter_registration = function( $args, $name ) {
+                        $args['attributes'] = array( $name => array( 'type' => 'boolean' ) );
+                        return $args;
+                };
+
+                add_filter( 'register_block_type_args', $filter_registration, 10, 2 );
+                register_block_type( 'core/test-filtered', array() );
+                remove_filter( 'register_block_type_args', $filter_registration );
+
+                $registry   = WP_Block_Type_Registry::get_instance();
+                $block_type = $registry->get_registered( 'core/test-filtered' );
+                $this->assertEquals( 'boolean', $block_type->attributes['core/test-filtered']['type'] );
+        }
 }