feat: add filter to get_block_context_interfaces() (#148)

* add filter to `get_block_context_interfaces()`

* chore: add changeset

---------

Co-authored-by: John Parris <john.parris@wpengine.com>

.changeset/calm-taxis-speak.md

@@ -0,0 +1,5 @@
+---
+"@wpengine/wp-graphql-content-blocks": minor
+---
+
+Added new `wpgraphql_content_blocks_should_apply_post_type_editor_blocks_interfaces` filter to allow controlling whether ${PostType}EditorBlock interfaces should be applied.

includes/Registry/Registry.php

@@ -109,6 +109,25 @@ public function get_block_context_interfaces( string $block_name ): array {
 			// Fetch the list of allowed blocks for the current post type
 			$supported_blocks_for_post_type_context = get_allowed_block_types( $block_editor_context );
 
+			/**
+			 * Filter before applying per-post_type Interfaces to blocks. This allows 3rd parties to control
+			 * whether the interface(s) should or should not be applied based on custom logic.
+			 *
+			 * @param bool                     $should                                 Whether to apply the ${PostType}EditorBlock Interface. If the filter returns false, the default
+			 *                                                                         logic will not execute and the ${PostType}EditorBlock will not be applied.
+			 * @param string                   $block_name                             The name of the block Interfaces will be applied to
+			 * @param \WP_Block_Editor_Context $block_editor_context                   The context of the Block Editor
+			 * @param \WP_Post_Type            $post_type                              The Post Type an Interface might be applied to the block for
+			 * @param array                    $all_registered_blocks                  Array of all registered blocks
+			 * @param array                    $supported_blocks_for_post_type_context Array of all supported blocks for the context
+			 * @param array                    $block_and_graphql_enabled_post_types   Array of Post Types that have block editor and GraphQL support
+			 */
+			$should_apply_post_type_editor_block_interface = apply_filters( 'wpgraphql_content_blocks_should_apply_post_type_editor_blocks_interfaces', true, $block_name, $block_editor_context, $post_type, $all_registered_blocks, $supported_blocks_for_post_type_context, $block_and_graphql_enabled_post_types );
+
+			if ( true !== $should_apply_post_type_editor_block_interface ) {
+				continue;
+			}
+
 			// If all blocks are supported in this context, we need a list of all the blocks
 			if ( true === $supported_blocks_for_post_type_context ) {
 				$supported_blocks_for_post_type_context = $all_registered_blocks;