146 lines
2.8 KiB
JavaScript
146 lines
2.8 KiB
JavaScript
import React from 'react'
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import {
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fetchBundleRequest,
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fetchBundleSuccess,
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fetchBundleFail,
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} from '../../../actions/bundles'
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const mapDispatchToProps = (dispatch) => ({
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onFetch() {
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dispatch(fetchBundleRequest())
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},
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onFetchSuccess() {
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dispatch(fetchBundleSuccess())
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},
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onFetchFail(error) {
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dispatch(fetchBundleFail(error))
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},
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})
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const emptyComponent = () => null
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const noop = () => { }
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export default
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@connect(null, mapDispatchToProps)
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class Bundle extends React.PureComponent {
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static propTypes = {
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fetchComponent: PropTypes.func.isRequired,
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loading: PropTypes.func,
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error: PropTypes.func,
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children: PropTypes.func.isRequired,
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renderDelay: PropTypes.number,
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onFetch: PropTypes.func,
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onFetchSuccess: PropTypes.func,
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onFetchFail: PropTypes.func,
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}
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static defaultProps = {
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loading: emptyComponent,
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error: emptyComponent,
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renderDelay: 0,
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onFetch: noop,
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onFetchSuccess: noop,
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onFetchFail: noop,
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}
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static cache = new Map
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state = {
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mod: undefined,
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forceRender: false,
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}
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componentWillMount() {
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this.load(this.props)
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}
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componentWillReceiveProps(nextProps) {
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if (nextProps.fetchComponent !== this.props.fetchComponent) {
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this.load(nextProps)
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}
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}
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componentWillUnmount() {
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if (this.timeout) {
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clearTimeout(this.timeout)
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}
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}
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load = (props) => {
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const {
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fetchComponent,
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onFetch,
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onFetchSuccess,
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onFetchFail,
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renderDelay
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} = props || this.props
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const cachedMod = Bundle.cache.get(fetchComponent)
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if (fetchComponent === undefined) {
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this.setState({
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mod: null
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})
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return Promise.resolve()
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}
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onFetch()
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if (cachedMod) {
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this.setState({
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mod: cachedMod.default
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})
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onFetchSuccess()
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return Promise.resolve()
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}
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this.setState({
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mod: undefined
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})
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if (renderDelay !== 0) {
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this.timestamp = new Date()
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this.timeout = setTimeout(() => this.setState({
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forceRender: true
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}), renderDelay)
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}
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return fetchComponent()
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.then((mod) => {
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Bundle.cache.set(fetchComponent, mod)
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this.setState({
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mod: mod.default
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})
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onFetchSuccess()
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})
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.catch((error) => {
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this.setState({
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mod: null
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})
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onFetchFail(error)
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})
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}
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render() {
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const {
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loading: LoadingComponent,
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error: ErrorComponent,
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children,
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renderDelay
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} = this.props
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const { mod, forceRender } = this.state
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const elapsed = this.timestamp ? (new Date() - this.timestamp) : renderDelay
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if (mod === undefined) {
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return (elapsed >= renderDelay || forceRender) ? <LoadingComponent /> : null
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} else if (mod === null) {
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return <ErrorComponent onRetry={this.load} />
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}
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return children(mod)
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}
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}
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