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* @module Infrastructure/Scripts/BackfillNewsOgLocaleAlternate
* @category SEO / Open Graph
* @name Backfill `og:locale:alternate` tags on news/*.html files
*
* @description
* Idempotent, pure-string backfill that injects the 13
* `<meta property="og:locale:alternate" content="...">` tags directly
* after the existing `<meta property="og:locale" content="...">` tag in
* every `news/**.html` file that is missing them.
*
* **Why this script exists**
* - About half of the news articles on disk (those produced by the older
* hand-authored breaking-news template, the daily news workflows, and
* the translation pipeline) ship a single `og:locale` tag and zero
* `og:locale:alternate` siblings. This breaks cross-language sharing
* on Facebook / LinkedIn / WhatsApp, which use the alternate locale
* list to surface the correct language version to readers.
* - The renderer in `scripts/render-lib/chrome/head.ts` already emits all
* 13 alternates for newly rendered articles; this script aligns the
* pre-rendered files with that contract without re-running the entire
* news pipeline.
*
* **Idempotency contract**
* 1. If the file already contains *any* `og:locale:alternate` tag, the
* file is left untouched.
* 2. If the file has no `og:locale` tag at all, it is left untouched
* (the renderer has not yet emitted the canonical block — a backfill
* here would corrupt the head).
* 3. Otherwise: insert the 13 sibling `og:locale:alternate` tags
* immediately after the existing `og:locale` tag, preserving the
* surrounding indentation pattern.
*
* **Detection**
* The current language is detected from the `og:locale` `content`
* attribute (e.g. `ja_JP`) → mapped back to the BCP-47 primary subtag
* (`ja`) via the inverse `OG_LOCALE` lookup table.
*
* **Invocation**
* tsx scripts/backfill-news-og-locale-alternate.ts # full backfill
* tsx scripts/backfill-news-og-locale-alternate.ts --dry-run # report only
* tsx scripts/backfill-news-og-locale-alternate.ts --check # exit-1 if missing
*
* @author Hack23 AB (Frontend / SEO)
* @license Apache-2.0
*/
import { promises as fs } from 'node:fs';
import * as path from 'node:path';
import { fileURLToPath } from 'node:url';
// ─── Type & lookup tables ──────────────────────────────────────────────────
export type Language =
| 'en' | 'sv' | 'da' | 'no' | 'fi' | 'de' | 'fr' | 'es'
| 'nl' | 'ar' | 'he' | 'ja' | 'ko' | 'zh';
export const OG_LOCALE: Readonly<Record<Language, string>> = {
en: 'en_US', sv: 'sv_SE', da: 'da_DK', no: 'nb_NO', fi: 'fi_FI',
de: 'de_DE', fr: 'fr_FR', es: 'es_ES', nl: 'nl_NL', ar: 'ar_SA',
he: 'he_IL', ja: 'ja_JP', ko: 'ko_KR', zh: 'zh_CN',
};
export const ALL_LANGS: readonly Language[] = [
'en', 'sv', 'da', 'no', 'fi', 'de', 'fr', 'es', 'nl',
'ar', 'he', 'ja', 'ko', 'zh',
];
/**
* Inverse lookup: `og:locale` content value (e.g. `ja_JP`) → primary
* BCP-47 subtag (`ja`). Generated once at module load.
*/
const OG_LOCALE_TO_LANG: Readonly<Record<string, Language>> = (() => {
const out: Record<string, Language> = {};
for (const l of ALL_LANGS) out[OG_LOCALE[l]] = l;
return out;
})();
/**
* Non-canonical → canonical `og:locale` alias table.
*
* Some older agentic news workflows emitted locale values that are valid
* Open Graph identifiers but differ from this project's canonical set:
*
* - `no_NO` → `nb_NO` — the platform follows BCP-47 (Norwegian Bokmål
* uses `nb`, not `no`); see project memory + `seo-metadata-contract.md`.
* - `en_GB` → `en_US` — the project ships a single English variant; the
* `en_US` form is the canonical OG locale across the rest of the
* surface (renderer, static pages, dashboards, political-intelligence).
*
* Normalization happens *before* the alternate-injection guard, so files
* whose only deviation is a non-canonical primary locale get rewritten
* (the alternates set keys off the canonical value).
*/
const OG_LOCALE_ALIASES: Readonly<Record<string, string>> = {
no_NO: 'nb_NO',
en_GB: 'en_US',
};
/**
* Match the *single-tag* `<meta property="og:locale" content="xx_YY">`
* line. Capture group 1 = leading whitespace (preserved), group 2 = the
* locale content (used to map back to the BCP-47 primary subtag).
*
* The regex is deliberately tolerant of single/double quotes and varying
* inner-attribute whitespace so it matches both the renderer output and
* the older hand-authored breaking-news template.
*/
const OG_LOCALE_LINE =
/^([ \t]*)<meta\s+property\s*=\s*["']og:locale["']\s+content\s*=\s*["']([^"']+)["']\s*\/?>\s*$/m;
/** Match *any* `og:locale:alternate` tag (used for the idempotency guard). */
const OG_LOCALE_ALTERNATE_ANY = /<meta\s+property\s*=\s*["']og:locale:alternate["']/i;
// ─── Public API ────────────────────────────────────────────────────────────
export interface BackfillResult {
readonly path: string;
readonly action: 'updated' | 'skipped-already-complete' | 'skipped-no-og-locale' | 'skipped-unknown-locale';
readonly lang?: Language;
/** True when a non-canonical `og:locale` value was normalized in place. */
readonly normalized?: boolean;
}
/**
* Backfill a single HTML string. Pure function — does not touch the
* filesystem. Returns the (possibly unchanged) HTML plus an action tag
* describing what happened.
*
* Contract:
* - If the input already contains any `og:locale:alternate` tag → no-op.
* - If no `og:locale` tag is present → no-op (we never invent one).
* - If the existing `og:locale` value is in `OG_LOCALE_ALIASES`, rewrite
* it to the canonical form *before* inserting the alternates list.
* - Otherwise we insert the 13 sibling alternate tags directly after the
* existing `og:locale`, using the same leading whitespace so the head
* block stays visually tidy.
*/
export function backfillHtml(html: string): { html: string; action: BackfillResult['action']; lang?: Language; normalized?: boolean } {
if (OG_LOCALE_ALTERNATE_ANY.test(html)) {
return { html, action: 'skipped-already-complete' };
}
const match = OG_LOCALE_LINE.exec(html);
if (!match) {
return { html, action: 'skipped-no-og-locale' };
}
const [fullLine, leadingWs, rawLocaleValue] = match;
// Normalize known non-canonical aliases (e.g. no_NO → nb_NO,
// en_GB → en_US) before resolving the BCP-47 primary subtag. The
// rewritten line replaces the original in the output so downstream
// tools (sitemap, validators) see a consistent locale set.
const canonicalLocale = OG_LOCALE_ALIASES[rawLocaleValue] ?? rawLocaleValue;
const lang = OG_LOCALE_TO_LANG[canonicalLocale];
if (!lang) {
return { html, action: 'skipped-unknown-locale' };
}
const normalized = canonicalLocale !== rawLocaleValue;
const canonicalLine = normalized
? fullLine.replace(rawLocaleValue, canonicalLocale)
: fullLine;
const alternates = ALL_LANGS
.filter((l) => l !== lang)
.map((l) => `${leadingWs}<meta property="og:locale:alternate" content="${OG_LOCALE[l]}">`)
.join('\n');
const next = html.replace(fullLine, `${canonicalLine}\n${alternates}`);
return { html: next, action: 'updated', lang, normalized };
}
/**
* List every `news/*.html` file (non-recursive — the news directory is
* already flat in this repo, plus a single `news/2026/` archive subtree
* which we explicitly include so older indexes are not left behind).
*/
export async function listNewsFiles(repoRoot: string): Promise<string[]> {
const newsDir = path.join(repoRoot, 'news');
const out: string[] = [];
async function walk(dir: string): Promise<void> {
let entries: import('node:fs').Dirent[];
try {
entries = await fs.readdir(dir, { withFileTypes: true });
} catch {
return;
}
for (const entry of entries) {
const full = path.join(dir, entry.name);
if (entry.isDirectory()) {
await walk(full);
} else if (entry.isFile() && entry.name.endsWith('.html')) {
out.push(full);
}
}
}
await walk(newsDir);
return out.sort();
}
export interface RunOptions {
readonly dryRun?: boolean;
readonly check?: boolean;
}
export interface RunSummary {
readonly total: number;
readonly updated: number;
readonly normalized: number;
readonly skippedAlreadyComplete: number;
readonly skippedNoOgLocale: number;
readonly skippedUnknownLocale: number;
}
/**
* Run the backfill across every news/*.html file under `repoRoot`.
*
* - `dryRun: true` → don't write any files; still returns a full summary.
* - `check: true` → after the dry-run pass, exit-1 if any file still
* has `skipped-no-og-locale` (used by CI as a guard).
*
* Exit semantics (when invoked as CLI):
* 0 — no files needed an update, or all updates succeeded
* 1 — `--check` and at least one file is missing the og:locale tag
*/
export async function runBackfill(repoRoot: string, opts: RunOptions = {}): Promise<RunSummary> {
const files = await listNewsFiles(repoRoot);
let updated = 0;
let normalized = 0;
let alreadyComplete = 0;
let noOgLocale = 0;
let unknownLocale = 0;
for (const file of files) {
const html = await fs.readFile(file, 'utf8');
const result = backfillHtml(html);
switch (result.action) {
case 'updated':
if (!opts.dryRun) {
await fs.writeFile(file, result.html, 'utf8');
}
updated++;
if (result.normalized) normalized++;
break;
case 'skipped-already-complete':
alreadyComplete++;
break;
case 'skipped-no-og-locale':
noOgLocale++;
break;
case 'skipped-unknown-locale':
unknownLocale++;
break;
}
}
return {
total: files.length,
updated,
normalized,
skippedAlreadyComplete: alreadyComplete,
skippedNoOgLocale: noOgLocale,
skippedUnknownLocale: unknownLocale,
};
}
// ─── CLI entry point ───────────────────────────────────────────────────────
async function main(): Promise<void> {
const args = new Set(process.argv.slice(2));
const dryRun = args.has('--dry-run') || args.has('--check');
const check = args.has('--check');
const repoRoot = path.resolve(path.dirname(fileURLToPath(import.meta.url)), '..');
const summary = await runBackfill(repoRoot, { dryRun });
console.log('=== news/*.html og:locale:alternate backfill ===');
console.log(` total files scanned: ${summary.total}`);
console.log(` updated: ${summary.updated}${dryRun ? ' (dry-run — no write)' : ''}`);
console.log(` └─ normalized non-canonical: ${summary.normalized}`);
console.log(` skipped (already complete): ${summary.skippedAlreadyComplete}`);
console.log(` skipped (no og:locale tag): ${summary.skippedNoOgLocale}`);
console.log(` skipped (unknown locale): ${summary.skippedUnknownLocale}`);
if (check && summary.updated > 0) {
console.error(
`\n✘ ${summary.updated} news file(s) are missing og:locale:alternate tags.`,
);
console.error(' Run: tsx scripts/backfill-news-og-locale-alternate.ts');
process.exit(1);
}
}
// Only run when invoked directly (not when imported by tests).
Iif (
typeof process !== 'undefined' &&
typeof import.meta !== 'undefined' &&
process.argv[1] &&
fileURLToPath(import.meta.url) === path.resolve(process.argv[1])
) {
main().catch((err) => {
console.error(err);
process.exit(1);
});
}
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