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| /** | |
| * 构建时根据 content/page-meta.json 向 HTML 写入英文标题、副标题、浏览器标题与导航锚文本， | |
| * 便于爬虫与不执行 JS 的环境读取。页内可见文案带 data-i18n，运行时由 initI18n 按英文 key 翻译； | |
| * 浏览器标题在构建时由本脚本写入：主标题与副标题与 page-meta 一致；副标题若以 “-” 开头（工具页 tagline）则与标题之间只加一个空格；否则中间加 “ - ”（如首页主副标题）。 | |
| * 中文环境由 <title data-i18n> 在 initI18n 翻译整串 key。 | |
| */ | |
| /** | |
| * @param {string} s | |
| * @returns {string} | |
| */ | |
| function escapeHtmlText(s) { | |
| return String(s) | |
| .replace(/&/g, '&') | |
| .replace(/</g, '<') | |
| .replace(/>/g, '>') | |
| .replace(/"/g, '"'); | |
| } | |
| /** | |
| * 浏览器标题与链接 title：title 与 subtitle 拼接（仅 trim 首尾空白）。 | |
| * 副标题已以 “-” 开头时不额外插入横线，避免 “Title - - tagline”；否则插入 “ - ”。 | |
| * | |
| * @param {{ title: string, subtitle: string }} meta | |
| */ | |
| function documentTitleEn(meta) { | |
| const title = String(meta.title ?? '').trim(); | |
| const subtitle = String(meta.subtitle ?? '').trim(); | |
| if (!title) return subtitle; | |
| if (!subtitle) return title; | |
| const joiner = subtitle.startsWith('-') ? ' ' : ' - '; | |
| return title + joiner + subtitle; | |
| } | |
| /** | |
| * 将带 `data-page-*` 的成对标签内容替换为纯文本（英文，已转义）。 | |
| * @param {string} html | |
| * @param {string} attrToken 如 data-page-title | |
| * @param {string} text | |
| */ | |
| function injectDataPageBlock(html, attrToken, text) { | |
| const esc = escapeHtmlText(text); | |
| const re = new RegExp( | |
| `<([a-z][a-z0-9]*)([^>]*\\b${attrToken}\\b[^>]*)>([\\s\\S]*?)<\\/\\1>`, | |
| 'gi' | |
| ); | |
| return html.replace(re, (_m, tag, attrs) => `<${tag}${attrs}>${esc}</${tag}>`); | |
| } | |
| /** | |
| * @param {string} html | |
| * @param {string} pageKey | |
| * @param {{ pages: Record<string, { title: string, subtitle: string, href?: string, heartline?: string, formula?: string }>, navPageKeys: string[] }} doc | |
| * @returns {string} | |
| */ | |
| function injectPageMeta(html, pageKey, doc) { | |
| const meta = doc.pages[pageKey]; | |
| if (!meta) { | |
| throw new Error(`injectPageMeta: unknown pageKey "${pageKey}"`); | |
| } | |
| const dt = documentTitleEn(meta); | |
| html = html.replace(/<title[^>]*>[^<]*<\/title>/i, `<title data-i18n>${escapeHtmlText(dt)}</title>`); | |
| html = injectDataPageBlock(html, 'data-page-title', meta.title); | |
| html = injectDataPageBlock(html, 'data-page-subtitle', meta.subtitle); | |
| const heartlineElRe = /<([a-z][a-z0-9]*)([^>]*\bdata-page-heartline\b[^>]*)>([\s\S]*?)<\/\1>/gi; | |
| if (meta.heartline) { | |
| html = html.replace(heartlineElRe, (_m, tag, attrs) => `<${tag}${attrs}>${escapeHtmlText(meta.heartline)}</${tag}>`); | |
| } else { | |
| html = html.replace(heartlineElRe, ''); | |
| } | |
| const formulaElRe = /<([a-z][a-z0-9]*)([^>]*\bdata-page-formula\b[^>]*)>([\s\S]*?)<\/\1>/gi; | |
| if (meta.formula) { | |
| html = html.replace(formulaElRe, (_m, tag, attrs) => `<${tag}${attrs}>${escapeHtmlText(meta.formula)}</${tag}>`); | |
| } else { | |
| html = html.replace(formulaElRe, ''); | |
| } | |
| if (pageKey === 'home' && Array.isArray(doc.navPageKeys)) { | |
| for (const navKey of doc.navPageKeys) { | |
| const navMeta = doc.pages[navKey]; | |
| if (!navMeta) { | |
| throw new Error(`injectPageMeta: navPageKeys references missing page "${navKey}"`); | |
| } | |
| const navTitle = documentTitleEn(navMeta); | |
| const textBlock = | |
| `<div class="nav-landing-card-text">` + | |
| `<span class="nav-landing-card-title" data-i18n>${escapeHtmlText(navMeta.title)}</span>` + | |
| `<span class="nav-landing-card-subtitle" data-i18n>${escapeHtmlText(navMeta.subtitle)}</span>` + | |
| `</div>`; | |
| const shot = | |
| navKey === 'causalFlow' | |
| ? null | |
| : `<div class="nav-landing-card-shot" aria-hidden="true"></div>`; | |
| const badge = | |
| navKey === 'causalFlow' | |
| ? `<span class="nav-landing-card-badge" title="Go to demo on RedNote: xhslink.com" data-i18n="text,title">700K+ plays on RedNote</span>` | |
| : ''; | |
| if (navKey === 'causalFlow') { | |
| const re = new RegExp( | |
| `(<div\\b[^>]*\\bdata-nav-page=["']?causalFlow["']?[^>]*>)([\\s\\S]*?)(<\\/div>)`, | |
| 'i' | |
| ); | |
| const m = html.match(re); | |
| if (!m) { | |
| throw new Error('injectPageMeta: missing <div data-nav-page="causalFlow"> in home HTML'); | |
| } | |
| const href = escapeHtmlText(navMeta.href || 'causal_flow.html'); | |
| const slideLink = (slide, content) => | |
| `<a class="nav-landing-card-link" data-demo-slide="${slide}" href="${href}" target="_blank" rel="noopener">${content}</a>`; | |
| const carouselShot = | |
| `<div class="nav-landing-card-shot nav-landing-card-shot--carousel" aria-hidden="true">` + | |
| `<div class="nav-landing-card-carousel-viewport">` + | |
| `<div class="nav-landing-card-slide" data-slide="flow">${slideLink('flow', '<video muted loop playsinline preload="metadata"></video>')}</div>` + | |
| `<div class="nav-landing-card-slide" data-slide="spiral">${slideLink('spiral', '<video muted loop playsinline preload="none"></video>')}</div>` + | |
| `<div class="nav-landing-card-slide" data-slide="cot">${slideLink('cot', '<video muted loop playsinline preload="none"></video>')}</div>` + | |
| `</div>` + | |
| `<button type="button" class="nav-landing-card-carousel-arrow nav-landing-card-carousel-arrow--prev" aria-label="Previous preview">‹</button>` + | |
| `<button type="button" class="nav-landing-card-carousel-arrow nav-landing-card-carousel-arrow--next" aria-label="Next preview">›</button>` + | |
| `<div class="nav-landing-card-carousel-dots">` + | |
| `<button type="button" class="nav-landing-card-carousel-dot is-active" aria-label="Preview 1"></button>` + | |
| `<button type="button" class="nav-landing-card-carousel-dot" aria-label="Preview 2"></button>` + | |
| `<button type="button" class="nav-landing-card-carousel-dot" aria-label="Preview 3"></button>` + | |
| `</div></div>`; | |
| const inner = | |
| badge + | |
| `<a class="nav-landing-card-link" data-demo-slide="flow" href="${href}" target="_blank" rel="noopener" title="${escapeHtmlText(navTitle)}">` + | |
| textBlock + | |
| `</a>` + | |
| carouselShot; | |
| html = html.replace(re, `${m[1]}${inner}${m[3]}`); | |
| continue; | |
| } | |
| const re = new RegExp( | |
| `(<a\\b[^>]*\\bdata-nav-page=["']?${navKey}["']?[^>]*>)([\\s\\S]*?)(<\\/a>)`, | |
| 'i' | |
| ); | |
| const m = html.match(re); | |
| if (!m) { | |
| throw new Error(`injectPageMeta: missing <a data-nav-page="${navKey}"> in home HTML`); | |
| } | |
| let openTag = m[1]; | |
| if (navMeta.href) { | |
| if (/\bhref\s*=/.test(openTag)) { | |
| openTag = openTag.replace( | |
| /\bhref\s*=\s*("[^"]*"|'[^']*')/i, | |
| `href="${escapeHtmlText(navMeta.href)}"` | |
| ); | |
| } else { | |
| openTag = openTag.replace(/>$/, ` href="${escapeHtmlText(navMeta.href)}">`); | |
| } | |
| } | |
| if (/\btitle\s*=/.test(openTag)) { | |
| openTag = openTag.replace(/\btitle\s*=\s*("[^"]*"|'[^']*')/i, `title="${escapeHtmlText(navTitle)}"`); | |
| } else { | |
| openTag = openTag.replace(/>$/, ` title="${escapeHtmlText(navTitle)}">`); | |
| } | |
| const inner = badge + textBlock + shot; | |
| html = html.replace(re, `${openTag}${inner}${m[3]}`); | |
| } | |
| } | |
| return html; | |
| } | |
| module.exports = { injectPageMeta, escapeHtmlText, documentTitleEn }; | |