wp-graphql-sanitize-acf-flex-fields.php

function _graphql_acf_sanitize_flexible_content_resolver( $value, $acf_field, $context, $type_name ) {

	if ( ! isset( $value['acf_fc_layout'] ) ) {
		return null;
	}

	$type_registry = $context->type_registry;

	$field_type_name = $type_name . '_' . ucfirst( \WPGraphQL\ACF\Config::camel_case( $acf_field['name'] ) );

	$layout_types = [];

	if ( ! empty( $acf_field['layouts'] ) && is_array( $acf_field['layouts'] ) ) {

		foreach ( $acf_field['layouts'] as $layout ) {

			$flex_field_layout_name = ! empty( $layout['name'] ) ? ucfirst( \WPGraphQL\ACF\Config::camel_case( $layout['name'] ) ) : null;
			$flex_field_layout_name = ! empty( $flex_field_layout_name ) ? $field_type_name . '_' . $flex_field_layout_name : null;

			if ( empty( $flex_field_layout_name ) ) {
				continue;
			}

			if ( ! $type_registry->get_type( $flex_field_layout_name ) ) {
				continue;
			}

			$layout_types[ $layout['name'] ] = $flex_field_layout_name;

		}

		if ( array_key_exists( $value['acf_fc_layout'], $layout_types ) ) {
			return $value;
		}
	}

	return null;

}

add_filter( 'graphql_resolve_field', function( $default, $source, $args, \WPGraphQL\AppContext $context, \GraphQL\Type\Definition\ResolveInfo $info, $type_name, $field_key, $field, $field_resolver ) {

	if ( ! isset( $info->fieldDefinition->config['acf_field']['type'] ) ) {
		return $default;
	}

	if ( 'flexible_content' !== $info->fieldDefinition->config['acf_field']['type'] && 'flexible_content' !== $info->fieldDefinition->config['acf_field']['type'] ) {
		return $default;
	}

	if ( empty( $default ) ) {
		return $default;
	}

	if ( is_array( $default ) ) {

		$sanitized = [];
		foreach( $default as $value ) {
			$sanitized[] = _graphql_acf_sanitize_flexible_content_resolver( $value, $info->fieldDefinition->config['acf_field'], $context, $info->parentType->name );
		}

		return array_filter( $sanitized );
	}

	return _graphql_acf_sanitize_flexible_content_resolver( $default, $info->fieldDefinition->config['acf_field'], $context, $info->parentType->name );

}, 10, 9 );