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July 8, 2019 13:54
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| import React from "react"; | |
| import { parse } from "url"; | |
| import PropTypes from "prop-types"; | |
| import Router from "next/router"; | |
| export default class LegacyPageWrapper extends React.Component { | |
| static propTypes = { | |
| backendHost: PropTypes.string, | |
| pageContents: PropTypes.string, | |
| allowFollowingLinkToLocation: PropTypes.func, | |
| loadLegacyModules: PropTypes.func, | |
| onNavigate: PropTypes.func | |
| }; | |
| static defaultProps = { | |
| backendHost: "https://api.nomadhealth.com", | |
| allowFollowingLinkToLocation: () => true, | |
| loadLegacyModules: () => {}, | |
| onNavigate: location => { | |
| Router.push(String(location)); | |
| } | |
| }; | |
| static async getInitialProps({ asPath }) { | |
| const response = await fetch(this.props.backendHost + asPath); | |
| const pageContents = await response.text(); | |
| return { pageContents }; | |
| } | |
| pageRef = React.createRef(); | |
| shouldComponentUpdate() { | |
| return false; | |
| } | |
| componentDidMount() { | |
| if (this.pageRef.current && typeof window.addEventListener === "function") { | |
| addEventListener("click", this.clickCaptured, true); | |
| this.props.loadLegacyModules(this.pageRef.current); | |
| } | |
| } | |
| componentWillUnmount() { | |
| if (typeof window.removeEventListener === "function") { | |
| removeEventListener("click", this.clickCaptured, true); | |
| removeEventListener("click", this.clickBubbled, false); | |
| } | |
| } | |
| clickCaptured = () => { | |
| removeEventListener("click", this.clickBubbled, false); | |
| addEventListener("click", this.clickBubbled, false); | |
| }; | |
| clickBubbled = event => { | |
| if (this.clickEventIsSignificant(event)) { | |
| const link = this.getVisitableLinkForTarget(event.target); | |
| if (link) { | |
| const location = this.getVisitableLocationForLink(link); | |
| if ( | |
| location && | |
| this.props.allowFollowingLinkToLocation(link, location) | |
| ) { | |
| event.preventDefault(); | |
| this.props.onNavigate(location); | |
| } | |
| } | |
| } | |
| }; | |
| clickEventIsSignificant(event) { | |
| return !( | |
| (event.target && event.target.isContentEditable) || | |
| event.defaultPrevented || | |
| event.which > 1 || | |
| event.altKey || | |
| event.ctrlKey || | |
| event.metaKey || | |
| event.shiftKey | |
| ); | |
| } | |
| getVisitableLinkForTarget(target) { | |
| if (target instanceof Element) { | |
| return closest(target, "a[href]:not([target]):not([download])"); | |
| } | |
| } | |
| getVisitableLocationForLink(link) { | |
| const location = new Location(link.getAttribute("href") || ""); | |
| if (location.isLocal()) { | |
| return location; | |
| } | |
| } | |
| render() { | |
| return ( | |
| <div | |
| ref={this.pageRef} | |
| dangerouslySetInnerHTML={{ __html: this.props.pageContents }} | |
| /> | |
| ); | |
| } | |
| } | |
| export class Location { | |
| constructor(href) { | |
| this.href = href; | |
| this.url = parse(href, false, true); | |
| } | |
| static getOrigin() { | |
| const { protocol, hostname, port } = window.location; | |
| return `${protocol}//${hostname}${port ? ":" + port : ""}`; | |
| } | |
| isLocal() { | |
| const origin = parse(Location.getOrigin(), false, true); | |
| return ( | |
| !this.url.host || | |
| (this.url.protocol === origin.protocol && this.url.host === origin.host) | |
| ); | |
| } | |
| } | |
| export const closest = (() => { | |
| const html = document.documentElement; | |
| const match = | |
| html.matches || | |
| html.webkitMatchesSelector || | |
| html.msMatchesSelector || | |
| html.mozMatchesSelector; | |
| const closest = | |
| html.closest || | |
| function(selector) { | |
| let element = this; | |
| while (element) { | |
| if (match.call(element, selector)) { | |
| return element; | |
| } else { | |
| element = element.parentElement; | |
| } | |
| } | |
| }; | |
| return function(element, selector) { | |
| return closest.call(element, selector); | |
| }; | |
| })(); |
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