List what user roles are associated with each capability

wpgraphql-list-roles-and-capabilities.php

add_filter( 'graphql_root_queries', function( $fields ) {

	$fields['userRoles'] = [
		'type' => \WPGraphQL\Types::list_of( new \WPGraphQL\Type\WPObjectType([
			'name' => 'UserRole',
			'fields' => [
				'name' => [
					'type' => \WPGraphQL\Types::string(),
				],
				'capabilities' => [
					'type' => \WPGraphQL\Types::list_of( \WPGraphQL\Types::string() ),
					'resolve' => function( $roles ) {
						$capabilities = [];
						if ( ! empty( $roles['capabilities'] ) && is_array( $roles['capabilities'] ) ) {
							$capabilities = array_keys( $roles['capabilities'] );
						}
						sort($capabilities );
						return $capabilities;
					}
				],
			],
		])),
		'resolve' => function( $root, $args, $context, $info ) {
			global $wp_roles;
			$roles = function_exists( 'get_editable_roles' ) ? get_editable_roles() : apply_filters( 'editable_roles', $wp_roles->roles );

			return ! empty( $roles ) ? $roles : null;
		}
	];

	return $fields;

} );

add_action( 'init', function() {

	$query = '
	{
		userRoles {
			name
			capabilities
		}
	}
	';

	$roles = do_graphql_request( $query );

	$all_capabilities = [];

	if ( ! empty( $roles['data']['userRoles'] ) ) {
		foreach ( $roles['data']['userRoles'] as $role ) {
			foreach ( $role['capabilities'] as $key => $capability ) {
				if ( ! isset( $all_capabilities[ $capability ] ) ) {
					$all_capabilities[ $capability ] = [];
				}
				array_push( $all_capabilities[ $capability ], $role['name'] );
			}
		}
	}

	foreach ( $all_capabilities as $cap => $roles ) {
		print_r( $cap );
		print_r( '<br/>' );
	}

	die();


});