/**
 * Copyright 2020 Gravitational, Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */ import React from 'react' ; import Logger from '../../libs/logger' ; import { useValidation } from './Validation' ; const logger = Logger . create ( 'validation' ) ; /**
 * useRule subscribes to validation requests upon which executes validate() callback
 */ export default function useRule ( cb ) { if ( typeof cb !== 'function' ) { logger . warn ( `useRule(fn), fn() must be a function` ) ; return ; } const [ , rerender ] = React . useState ( ) ; const validator = useValidation ( ) ; React . useEffect ( ( ) => { function onValidate ( ) { if ( validator . validating ) { const result = cb ( ) ; validator . addResult ( result ) ; rerender ( { } ) ; } } validator . subscribe ( onValidate ) ; function cleanup ( ) { validator . unsubscribe ( onValidate ) ; } return cleanup ; } , [ cb ] ) ; if ( validator . validating ) { return cb ( ) ; } return { valid : true } ; }