146 lines
4.7 KiB
JavaScript
146 lines
4.7 KiB
JavaScript
'use strict';
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const assert = require('assert');
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const urlJoin = require('url-join');
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const { getSerializableSpans } = require('../tracing/tracing-middleware');
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const sanitizeHtml = require('../lib/sanitize-html');
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const safeJson = require('../lib/safe-json');
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const getDependenciesForEntryPointName = require('../lib/get-dependencies-for-entry-point-name');
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const getAssetUrl = require('../lib/get-asset-url');
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const config = require('../lib/config');
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const basePath = config.get('basePath');
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assert(basePath);
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let _assetUrls;
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function getAssetUrls() {
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// Probably not that much overhead but only calculate this once
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if (_assetUrls) {
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return _assetUrls;
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}
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_assetUrls = {
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faviconIco: getAssetUrl('client/img/favicon.ico'),
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faviconSvg: getAssetUrl('client/img/favicon.svg'),
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opengraphImage: getAssetUrl('client/img/opengraph.png'),
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};
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return _assetUrls;
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}
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function renderPageHtml({
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pageOptions,
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// Make sure you sanitize this before passing it to us
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bodyHtml,
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vmRenderContext,
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}) {
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assert(vmRenderContext);
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assert(pageOptions);
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assert(pageOptions.title);
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assert(pageOptions.description);
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assert(pageOptions.entryPoint);
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assert(pageOptions.cspNonce);
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const { styles, scripts } = getDependenciesForEntryPointName(pageOptions.entryPoint);
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// Serialize the state for when we run the Hydrogen render again client-side to
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// re-hydrate the DOM
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const serializedMatrixViewerContext = JSON.stringify({
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...vmRenderContext,
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});
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const serializableSpans = getSerializableSpans();
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const serializedSpans = JSON.stringify(serializableSpans);
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// We shouldn't let some pages be indexed by search engines
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let maybeNoIndexHtml = '';
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if (!pageOptions.shouldIndex) {
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maybeNoIndexHtml = `<meta name="robots" content="noindex, nofollow">`;
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}
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// We should tell search engines that some pages are NSFW, see
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// https://developers.google.com/search/docs/crawling-indexing/safesearch
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let maybeAdultMeta = '';
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if (pageOptions.blockedBySafeSearch) {
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maybeAdultMeta = `<meta name="rating" content="adult">`;
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}
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const pageAssetUrls = getAssetUrls();
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let metaImageUrl = urlJoin(basePath, pageAssetUrls.opengraphImage);
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if (pageOptions.imageUrl) {
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metaImageUrl = pageOptions.imageUrl;
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}
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let maybeRelCanonical = '';
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if (pageOptions.canonicalUrl) {
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maybeRelCanonical = sanitizeHtml(`<link rel="canonical" href="${pageOptions.canonicalUrl}">`);
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}
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const pageHtml = `
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<!doctype html>
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<html lang="en">
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<head>
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<meta name="viewport" content="width=device-width, initial-scale=1">
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${maybeNoIndexHtml}
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${maybeAdultMeta}
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${sanitizeHtml(`<title>${pageOptions.title}</title>`)}
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${sanitizeHtml(`<meta name="description" content="${pageOptions.description}">`)}
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${sanitizeHtml(`<meta property="og:image" content="${metaImageUrl}">`)}
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<link rel="icon" href="${pageAssetUrls.faviconIco}" sizes="any">
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<link rel="icon" href="${pageAssetUrls.faviconSvg}" type="image/svg+xml">
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${maybeRelCanonical}
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${styles
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.map(
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(styleUrl) =>
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`<link href="${styleUrl}" rel="stylesheet" nonce="${pageOptions.cspNonce}">`
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)
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.join('\n')}
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</head>
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<body>
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${bodyHtml}
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${
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/**
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* This inline snippet is used in to scroll the Hydrogen timeline to the
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* right place immediately when the page loads instead of waiting for
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* Hydrogen to load, hydrate and finally scroll.
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*/ ''
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}
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<script type="text/javascript" nonce="${pageOptions.cspNonce}">
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const qs = new URLSearchParams(window?.location?.search);
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const atEventId = qs.get('at');
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if (atEventId) {
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const el = document.querySelector(\`[data-event-id="\${atEventId}"]\`);
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requestAnimationFrame(() => {
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el && el.scrollIntoView({ block: 'center' });
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});
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} else {
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const el = document.querySelector('.js-bottom-scroll-anchor');
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requestAnimationFrame(() => {
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el && el.scrollIntoView({ block: 'end' });
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});
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}
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</script>
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<script type="text/javascript" nonce="${pageOptions.cspNonce}">
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window.matrixViewerContext = ${safeJson(serializedMatrixViewerContext)}
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</script>
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${scripts
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.map(
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(scriptUrl) =>
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`<script type="module" src="${scriptUrl}" nonce="${pageOptions.cspNonce}"></script>`
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)
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.join('\n')}
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<script type="text/javascript" nonce="${pageOptions.cspNonce}">
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window.tracingSpansForRequest = ${safeJson(serializedSpans)};
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</script>
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</body>
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</html>
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`;
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return pageHtml;
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}
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module.exports = renderPageHtml;
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