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// SPDX-License-Identifier: Apache-2.0
/**
* One-shot migration script to normalize legacy news/*.html files to the
* current canonical header/footer/script layout.
*
* Applied operations per file (idempotent — safe to re-run):
* 1. Upgrade the `<header class="site-header">` block to the current markup
* (header-logo.png/webp at 72×48, theme-toggle, in-header language
* switcher `<nav class="site-header__langs">`).
* 2. Remove any standalone legacy `<nav class="language-switcher">` block
* that sits outside the header.
* 3. Replace the two inline `<script>` blocks (reading-progress + theme
* toggle) with a single `<script src="../js/article-runtime.js" defer>`.
* 4. Replace the `<footer class="site-footer">` with a freshly rendered
* fully-localized footer built via `buildSiteFooter` — so Quick Links,
* Built by, contact, disclaimer etc. are all in the correct language
* for all 14 languages.
*
* Preserved as-is:
* - All JSON-LD schema scripts (`<script type="application/ld+json">`).
* - The `<article>` body and all analysis sections.
* - Chart.js / D3 vendor + init scripts when already present.
* - Hreflang link alternates, canonical link, meta tags.
*
* Usage: `node scripts/utils/migrate-legacy-articles.js [--dry-run]`
*/
import { promises as fs } from 'node:fs';
import path from 'node:path';
import { fileURLToPath } from 'node:url';
import { buildSiteFooter } from '../templates/section-builders.js';
import {
ALL_LANGUAGES,
LANGUAGE_FLAGS,
LANGUAGE_NAMES,
THEME_TOGGLE_LABELS,
HEADER_SUBTITLE_LABELS,
getLocalizedString,
} from '../constants/languages.js';
import { createThemeToggleButton } from '../constants/config.js';
const __filename = fileURLToPath(import.meta.url);
const __dirname = path.dirname(__filename);
const REPO_ROOT = path.resolve(__dirname, '..', '..');
const NEWS_DIR = path.join(REPO_ROOT, 'news');
/** Simple HTML-entity encode for attribute values. */
function escapeHTML(s) {
return String(s)
.replace(/&/g, '&')
.replace(/</g, '<')
.replace(/>/g, '>')
.replace(/"/g, '"')
.replace(/'/g, ''');
}
/** Parse `YYYY-MM-DD-slug-[runNN-]LL.html` → { date, slug, lang }. */
function parseFilename(filename) {
const m = filename.match(/^(\d{4}-\d{2}-\d{2})-([a-z0-9-]+?)(?:-run\d+)?-([a-z]{2})\.html$/);
if (!m) return null;
const [, date, slug, lang] = m;
if (!ALL_LANGUAGES.includes(lang)) return null;
return { date, slug, lang };
}
/** Build the in-header language switcher anchor list (no wrapping <nav>). */
function buildLangSwitcherAnchors(date, slug, currentLang, availableLanguages) {
const langs = availableLanguages.length > 0 ? availableLanguages : ALL_LANGUAGES;
return langs
.map((code) => {
const flag = getLocalizedString(LANGUAGE_FLAGS, code);
const name = getLocalizedString(LANGUAGE_NAMES, code);
const active = code === currentLang ? ' active' : '';
const href = `${date}-${slug}-${code}.html`;
return `<a href="${escapeHTML(href)}" class="lang-link${active}" hreflang="${code}" lang="${code}" title="${escapeHTML(name)}">${flag} ${code.toUpperCase()}</a>`;
})
.join('\n ');
}
/** Build the canonical `<header class="site-header">…</header>` block. */
function buildCanonicalHeader(date, slug, lang, availableLanguages) {
const themeLabel = escapeHTML(getLocalizedString(THEME_TOGGLE_LABELS, lang));
const subtitle = escapeHTML(getLocalizedString(HEADER_SUBTITLE_LABELS, lang));
const langs = buildLangSwitcherAnchors(date, slug, lang, availableLanguages);
const indexHref = lang === 'en' ? '../index.html' : `../index-${lang}.html`;
return `<header class="site-header" role="banner">
<div class="site-header__inner">
<a href="${escapeHTML(indexHref)}" class="site-header__brand" aria-label="EU Parliament Monitor">
<picture class="site-header__logo-picture">
<source srcset="../images/header-logo.webp" type="image/webp">
<img class="site-header__logo site-header__logo--header" src="../images/header-logo.png" alt="" width="72" height="48" aria-hidden="true">
</picture>
<span>
<span class="site-header__title">EU Parliament Monitor</span>
<span class="site-header__subtitle">${subtitle}</span>
</span>
</a>
${createThemeToggleButton(themeLabel)}
<nav class="site-header__langs" role="navigation" aria-label="Language selection">
${langs}
</nav>
</div>
</header>`;
}
/** Detect which languages a given {date}-{slug} article has. */
function discoverAvailableLanguages(allFilenames, date, slug) {
const set = new Set();
for (const f of allFilenames) {
// Match both suffixed (-runNN-LL) and plain (-LL) patterns
const m = f.match(
new RegExp(`^${date}-${slug.replace(/[-.]/g, '\\$&')}(?:-run\\d+)?-([a-z]{2})\\.html$`)
);
if (m && ALL_LANGUAGES.includes(m[1])) set.add(m[1]);
}
return ALL_LANGUAGES.filter((l) => set.has(l));
}
/**
* Apply in-place migrations to one HTML document string.
* Returns the new content (same string if no changes).
*/
function migrateDocument(html, date, slug, lang, availableLanguages) {
let out = html;
// ── 1. Replace the `<header class="site-header">…</header>` block
// with the canonical version (handles both legacy and "modern" headers)
const canonicalHeader = buildCanonicalHeader(date, slug, lang, availableLanguages);
out = out.replace(
/<header class="site-header"[\s\S]*?<\/header>/,
() => canonicalHeader
);
// ── 2. Remove any standalone legacy `<nav class="language-switcher">…</nav>`
// (legacy files put lang-switcher nav OUTSIDE the header; modern
// files put it INSIDE the header as site-header__langs — we already
// injected that in step 1, so any remaining standalone nav is redundant).
out = out.replace(
/\s*<nav class="language-switcher"[\s\S]*?<\/nav>\s*/g,
'\n\n '
);
// ── 3. Replace inline `<script>…</script>` blocks that handle
// reading-progress or theme-toggle with nothing. The external
// `<script src="../js/article-runtime.js" defer>` is injected if
// not already present. JSON-LD scripts (type="application/ld+json")
// are left untouched.
out = out.replace(/<script(?![^>]*\bsrc=)(?![^>]*\btype="application\/ld\+json")[^>]*>[\s\S]*?<\/script>\s*/g,
(block) => {
// Preserve non-theme/non-reading-progress inline scripts (very rare but
// possible for chart-init/d3-init fallbacks)
if (/reading-progress/.test(block) || /ep-theme/.test(block) || /theme-toggle/.test(block)) {
return '';
}
return block;
}
);
// Ensure article-runtime.js is referenced exactly once before </body>.
if (!/<script\s[^>]*src="\.\.\/js\/article-runtime\.js"/i.test(out)) {
out = out.replace(
/<\/body>/i,
' <script src="../js/article-runtime.js" defer></script>\n</body>'
);
}
// ── 4. Replace the <footer class="site-footer">…</footer> block with a
// freshly-rendered, fully-localized footer.
const newFooter = buildSiteFooter({ lang, pathPrefix: '../' });
out = out.replace(/<footer class="site-footer"[\s\S]*?<\/footer>/, () => newFooter);
return out;
}
async function main() {
const dryRun = process.argv.includes('--dry-run');
const filesArg = process.argv.find((a) => a.startsWith('--files='));
const allFiles = (await fs.readdir(NEWS_DIR)).filter((f) => f.endsWith('.html'));
const files = filesArg
? filesArg.slice('--files='.length).split(',').filter((f) => f.endsWith('.html'))
: allFiles;
let changed = 0;
let skipped = 0;
let errors = 0;
for (const f of files) {
const parsed = parseFilename(f);
if (!parsed) {
skipped++;
continue;
}
const { date, slug, lang } = parsed;
const available = discoverAvailableLanguages(allFiles, date, slug);
const p = path.join(NEWS_DIR, f);
try {
const before = await fs.readFile(p, 'utf8');
const after = migrateDocument(before, date, slug, lang, available);
if (after !== before) {
if (!dryRun) await fs.writeFile(p, after, 'utf8');
changed++;
} else {
skipped++;
}
} catch (err) {
console.error(`✗ ${f}: ${err.message}`);
errors++;
}
}
console.log(
`${dryRun ? '[dry-run] ' : ''}migrated: ${changed}, unchanged: ${skipped}, errors: ${errors}, total: ${files.length}`
);
if (errors > 0) process.exit(1);
}
main().catch((err) => {
console.error(err);
process.exit(1);
});
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