index.js
139 lines
| 1 | /** |
| 2 | * NOTE: This is a fork of the original ServerSideRenderX component. |
| 3 | * You can find more about that project here: https://github.com/dgwyer/server-side-render-x |
| 4 | * |
| 5 | * Changes: |
| 6 | * - some minor clean up was done to remove references to variables which were never actually used. |
| 7 | */ |
| 8 | |
| 9 | /** |
| 10 | * External dependencies |
| 11 | */ |
| 12 | import {isEqual, debounce} from 'lodash'; |
| 13 | |
| 14 | /** |
| 15 | * WordPress dependencies |
| 16 | */ |
| 17 | const {Component, RawHTML, Fragment} = wp.element; |
| 18 | import { __ } from '@wordpress/i18n' |
| 19 | const apiFetch = wp.apiFetch; |
| 20 | const {addQueryArgs} = wp.url; |
| 21 | const {Placeholder} = wp.components; |
| 22 | |
| 23 | export function rendererPath(block, attributes = null, urlQueryArgs = {}) { |
| 24 | return addQueryArgs(`/wp/v2/block-renderer/${block}`, { |
| 25 | context: 'edit', |
| 26 | ...(null !== attributes ? {attributes} : {}), |
| 27 | ...urlQueryArgs, |
| 28 | }); |
| 29 | } |
| 30 | |
| 31 | export class ServerSideRenderX extends Component { |
| 32 | constructor(props) { |
| 33 | super(props); |
| 34 | this.state = { |
| 35 | response: null, |
| 36 | prevResponse: null, |
| 37 | }; |
| 38 | } |
| 39 | |
| 40 | componentDidMount() { |
| 41 | this.isStillMounted = true; |
| 42 | this.fetch(this.props); |
| 43 | // Only debounce once the initial fetch occurs to ensure that the first |
| 44 | // renders show data as soon as possible. |
| 45 | this.fetch = debounce(this.fetch, 500); |
| 46 | } |
| 47 | |
| 48 | componentWillUnmount() { |
| 49 | this.isStillMounted = false; |
| 50 | } |
| 51 | |
| 52 | componentDidUpdate(prevProps) { |
| 53 | if (!isEqual(prevProps, this.props)) { |
| 54 | this.fetch(this.props); |
| 55 | } |
| 56 | } |
| 57 | |
| 58 | fetch(props) { |
| 59 | if (!this.isStillMounted) { |
| 60 | return; |
| 61 | } |
| 62 | if (null !== this.state.response) { |
| 63 | this.setState((state) => ({ |
| 64 | response: null, |
| 65 | prevResponse: state.response, |
| 66 | })); |
| 67 | } |
| 68 | const {block, attributes = null, urlQueryArgs = {}} = props; |
| 69 | |
| 70 | const path = rendererPath(block, attributes, urlQueryArgs); |
| 71 | // Store the latest fetch request so that when we process it, we can |
| 72 | // check if it is the current request, to avoid race conditions on slow networks. |
| 73 | const fetchRequest = (this.currentFetchRequest = apiFetch({path}) |
| 74 | .then((response) => { |
| 75 | if (this.isStillMounted && fetchRequest === this.currentFetchRequest && response) { |
| 76 | this.setState({response: response.rendered}); |
| 77 | } |
| 78 | }) |
| 79 | .catch((error) => { |
| 80 | if (this.isStillMounted && fetchRequest === this.currentFetchRequest) { |
| 81 | this.setState({ |
| 82 | response: { |
| 83 | error: true, |
| 84 | errorMsg: error.message, |
| 85 | }, |
| 86 | }); |
| 87 | } |
| 88 | })); |
| 89 | return fetchRequest; |
| 90 | } |
| 91 | |
| 92 | render() { |
| 93 | const {right, top, unit} = this.props.spinnerLocation; |
| 94 | const response = this.state.response; |
| 95 | const prevResponse = this.state.prevResponse; |
| 96 | let prevResponseHTML = ''; |
| 97 | if (prevResponse !== null) { |
| 98 | prevResponseHTML = `<div style="position:relative;"><div style="position:absolute;right:${right}${unit};top:${top}${unit};z-index:1"><span class="components-spinner"></span></div>${prevResponse}</div>`; |
| 99 | } |
| 100 | |
| 101 | const { |
| 102 | className, |
| 103 | EmptyResponsePlaceholder = ({className}) => ( |
| 104 | <Placeholder className={className}>{__('Block rendered as empty.')}</Placeholder> |
| 105 | ), |
| 106 | ErrorResponsePlaceholder = ({response, className}) => { |
| 107 | const errorMessage = sprintf( |
| 108 | // translators: %s: error message describing the problem |
| 109 | __('Error loading block: %s'), |
| 110 | response.errorMsg |
| 111 | ); |
| 112 | return <Placeholder className={className}>{errorMessage}</Placeholder>; |
| 113 | }, |
| 114 | } = this.props; |
| 115 | |
| 116 | if (response === '') { |
| 117 | return <EmptyResponsePlaceholder response={response} {...this.props} />; |
| 118 | } else if (!response) { |
| 119 | return ( |
| 120 | <Fragment> |
| 121 | <RawHTML key="html" className={className}> |
| 122 | {prevResponseHTML} |
| 123 | </RawHTML> |
| 124 | </Fragment> |
| 125 | ); |
| 126 | } else if (response.error) { |
| 127 | return <ErrorResponsePlaceholder response={response} {...this.props} />; |
| 128 | } |
| 129 | |
| 130 | return ( |
| 131 | <RawHTML key="html" className={className}> |
| 132 | {response} |
| 133 | </RawHTML> |
| 134 | ); |
| 135 | } |
| 136 | } |
| 137 | |
| 138 | export default ServerSideRenderX; |
| 139 |