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* @module Infrastructure/SEO
* @category Intelligence Operations / Supporting Infrastructure
* @name RSS Feed Generation - Multi-Language RSS 2.0 Feed
*
* @description
* Generates an RSS 2.0 feed (rss.xml) for the Riksdagsmonitor political intelligence platform.
* The feed includes English articles as primary items and multi-language alternates
* using the hreflang atom:link extension.
*
* @author Hack23 AB (Infrastructure Team)
* @license Apache-2.0
* @version 1.0.0
*/
import fs from 'fs';
import path from 'path';
import { fileURLToPath } from 'url';
import type { Language } from './types/language.js';
const __filename = fileURLToPath(import.meta.url);
const __dirname = path.dirname(__filename);
console.log('📡 RSS Feed Generation Script');
// ---------------------------------------------------------------------------
// Configuration
// ---------------------------------------------------------------------------
const BASE_URL = 'https://riksdagsmonitor.com';
const NEWS_DIR = path.join(__dirname, '..', 'news');
const ROOT_DIR = path.join(__dirname, '..');
const RSS_FILE = path.join(ROOT_DIR, 'rss.xml');
const MAX_ITEMS = 50; // Limit RSS to most recent 50 articles
// ---------------------------------------------------------------------------
// Types
// ---------------------------------------------------------------------------
interface RssArticle {
file: string;
title: string;
description: string;
link: string;
pubDate: string;
baseSlug: string;
lang: Language;
author: string;
category: string;
alternateLanguages: Array<{ lang: Language; href: string }>;
}
// ---------------------------------------------------------------------------
// Functions
// ---------------------------------------------------------------------------
/**
* Escape XML special characters, preserving existing HTML/XML entities.
*/
function escapeXml(text: string): string {
return text
.replace(/&(?!(?:#\d+|#x[0-9a-fA-F]+|[a-zA-Z]+);)/g, '&')
.replace(/</g, '<')
.replace(/>/g, '>')
.replace(/"/g, '"')
.replace(/'/g, ''');
}
/**
* Map file-suffix language codes to proper BCP-47 hreflang codes.
* Norwegian files use the suffix "no" but hreflang should be "nb" (Bokmål).
*/
function hreflangCode(lang: string): string {
if (lang === 'no') return 'nb';
return lang;
}
/**
* Derive a stable publication date from the filename date prefix (YYYY-MM-DD)
* or fall back to the file's modification time. Never uses "now" so builds are
* deterministic.
*/
function stablePubDate(filePath: string): string {
const basename = path.basename(filePath);
const dateMatch = basename.match(/^(\d{4}-\d{2}-\d{2})/);
if (dateMatch) {
return new Date(`${dateMatch[1]}T12:00:00Z`).toISOString();
}
try {
return fs.statSync(filePath).mtime.toISOString();
} catch (_e: unknown) {
return '2026-01-01T12:00:00.000Z';
}
}
function extractArticleMeta(filePath: string): {
title: string;
description: string;
pubDate: string;
author: string;
category: string;
} {
const fallbackDate = stablePubDate(filePath);
try {
const content = fs.readFileSync(filePath, 'utf8');
const titleMatch = content.match(/<title>([^<]+)<\/title>/i);
const descMatch = content.match(/<meta\s+name="description"\s+content="([^"]+)"/i);
const pubDateMatch = content.match(/<meta\s+property="article:published_time"\s+content="([^"]+)"/i);
const authorMatch = content.match(/<meta\s+name="author"\s+content="([^"]+)"/i);
const sectionMatch = content.match(/<meta\s+property="article:section"\s+content="([^"]+)"/i);
return {
title: titleMatch ? titleMatch[1]!.trim() : path.basename(filePath, '.html'),
description: descMatch ? descMatch[1]!.trim() : '',
pubDate: pubDateMatch ? pubDateMatch[1]!.trim() : fallbackDate,
author: authorMatch ? authorMatch[1]!.trim() : 'Riksdagsmonitor',
category: sectionMatch ? sectionMatch[1]!.trim() : 'Political Analysis',
};
} catch (_error: unknown) {
return {
title: path.basename(filePath, '.html'),
description: '',
pubDate: fallbackDate,
author: 'Riksdagsmonitor',
category: 'Political Analysis',
};
}
}
/**
* Get news articles for RSS feed, primarily English with multi-language alternates.
*/
function getRssArticles(): RssArticle[] {
console.log('📰 Scanning news directory for RSS articles...');
Iif (!fs.existsSync(NEWS_DIR)) {
console.warn('⚠️ News directory not found');
return [];
}
const files = fs
.readdirSync(NEWS_DIR)
.filter((file) => file.endsWith('.html') && file !== 'index.html' && !file.startsWith('index_'));
// Group files by base slug
const articleGroups = new Map<string, Map<Language, string>>();
for (const file of files) {
const match = file.match(/^(.+?)-(en|sv|da|no|fi|de|fr|es|nl|ar|he|ja|ko|zh)\.html$/);
Eif (match) {
const baseSlug = match[1]!;
const lang = match[2]! as Language;
if (!articleGroups.has(baseSlug)) {
articleGroups.set(baseSlug, new Map());
}
articleGroups.get(baseSlug)!.set(lang, file);
}
}
// Build RSS articles from English entries (with multi-language alternates)
const articles: RssArticle[] = [];
for (const [baseSlug, langMap] of articleGroups) {
// Primary: use English if available, otherwise skip this group for RSS
const enFile = langMap.get('en');
Iif (!enFile) continue;
const filePath = path.join(NEWS_DIR, enFile);
const meta = extractArticleMeta(filePath);
const alternates: Array<{ lang: Language; href: string }> = [];
for (const [lang, altFile] of langMap) {
if (lang !== 'en') {
alternates.push({
lang,
href: `${BASE_URL}/news/${altFile}`,
});
}
}
articles.push({
file: enFile,
title: meta.title,
description: meta.description,
link: `${BASE_URL}/news/${enFile}`,
pubDate: meta.pubDate,
baseSlug,
lang: 'en',
author: meta.author,
category: meta.category,
alternateLanguages: alternates,
});
}
// Sort by publication date descending (most recent first)
articles.sort((a, b) => new Date(b.pubDate).getTime() - new Date(a.pubDate).getTime());
console.log(` Found ${articles.length} English articles with multi-language alternates`);
return articles.slice(0, MAX_ITEMS);
}
/**
* Generate RSS 2.0 XML feed.
*/
function generateRss(): string {
console.log('🔨 Generating RSS feed...');
const articles = getRssArticles();
const now = new Date().toUTCString();
// Use most recent article date for lastBuildDate
const lastBuildDate = articles.length > 0
? new Date(articles[0]!.pubDate).toUTCString()
: now;
let xml = `<?xml version="1.0" encoding="UTF-8"?>
<rss version="2.0"
xmlns:atom="http://www.w3.org/2005/Atom"
xmlns:dc="http://purl.org/dc/elements/1.1/"
xmlns:content="http://purl.org/rss/1.0/modules/content/">
<channel>
<title>Riksdagsmonitor - Swedish Parliament Intelligence</title>
<link>${BASE_URL}</link>
<description>Real-time monitoring, analysis, and intelligence from the Swedish Parliament (Riksdag) and Government. Covering legislative activity, voting patterns, coalition dynamics, and election forecasts.</description>
<language>en</language>
<lastBuildDate>${lastBuildDate}</lastBuildDate>
<pubDate>${lastBuildDate}</pubDate>
<ttl>60</ttl>
<copyright>Copyright ${articles.length > 0 ? new Date(articles[0]!.pubDate).getUTCFullYear() : new Date(lastBuildDate).getUTCFullYear()} Hack23 AB. Licensed under Apache-2.0.</copyright>
<managingEditor>info@hack23.com (Hack23 AB)</managingEditor>
<webMaster>info@hack23.com (Hack23 AB)</webMaster>
<generator>Riksdagsmonitor RSS Generator v1.0</generator>
<docs>https://www.rssboard.org/rss-specification</docs>
<image>
<url>https://hack23.com/cia-icon-140.webp</url>
<title>Riksdagsmonitor</title>
<link>${BASE_URL}</link>
<width>140</width>
<height>140</height>
<description>Riksdagsmonitor - Swedish Parliament Intelligence Platform</description>
</image>
<atom:link href="${BASE_URL}/rss.xml" rel="self" type="application/rss+xml"/>`;
// Add category tags for the channel
const channelCategories = [
'Swedish Politics', 'Parliament', 'Riksdag', 'Political Intelligence',
'Election Analysis', 'Legislative Monitoring',
];
for (const cat of channelCategories) {
xml += `
<category>${escapeXml(cat)}</category>`;
}
// Add items
for (const article of articles) {
xml += `
<item>
<title>${escapeXml(article.title)}</title>
<link>${escapeXml(article.link)}</link>
<description>${escapeXml(article.description)}</description>
<pubDate>${new Date(article.pubDate).toUTCString()}</pubDate>
<guid isPermaLink="true">${escapeXml(article.link)}</guid>
<dc:creator>${escapeXml(article.author)}</dc:creator>
<category>${escapeXml(article.category)}</category>
<atom:link href="${escapeXml(article.link)}" rel="alternate" type="text/html" hreflang="en"/>`;
// Add multi-language alternate links
for (const alt of article.alternateLanguages) {
xml += `
<atom:link href="${escapeXml(alt.href)}" rel="alternate" type="text/html" hreflang="${hreflangCode(alt.lang)}"/>`;
}
xml += `
</item>`;
}
xml += `
</channel>
</rss>`;
return xml;
}
/**
* Validate RSS XML feed.
*/
function validateRss(xml: string): boolean {
console.log('✅ Validating RSS feed...');
if (!xml.includes('<?xml version="1.0"')) {
throw new Error('Invalid XML declaration');
}
if (!xml.includes('<rss version="2.0"')) {
throw new Error('Missing RSS 2.0 version');
}
if (!xml.includes('<channel>')) {
throw new Error('Missing <channel> element');
}
Iif (!xml.includes('<title>')) {
throw new Error('Missing <title> element');
}
Iif (!xml.includes('<link>')) {
throw new Error('Missing <link> element');
}
Iif (!xml.includes('<description>')) {
throw new Error('Missing <description> element');
}
const itemCount = (xml.match(/<item>/g) || []).length;
console.log(` Found ${itemCount} items in RSS feed`);
if (itemCount === 0) {
throw new Error('No items in RSS feed');
}
// Validate all items have required elements
const titleCount = (xml.match(/<item>[\s\S]*?<title>/g) || []).length;
const linkCount = (xml.match(/<item>[\s\S]*?<link>/g) || []).length;
const guidCount = (xml.match(/<guid/g) || []).length;
Iif (titleCount !== itemCount) {
throw new Error(`Not all items have <title> tags (${titleCount}/${itemCount})`);
}
Iif (linkCount !== itemCount) {
throw new Error(`Not all items have <link> tags (${linkCount}/${itemCount})`);
}
Iif (guidCount !== itemCount) {
throw new Error(`Not all items have <guid> tags (${guidCount}/${itemCount})`);
}
console.log(' ✅ RSS feed validation passed');
return true;
}
/**
* Main function.
*/
function main(): number {
try {
console.log('🚀 Starting RSS feed generation...\n');
const rss = generateRss();
validateRss(rss);
fs.writeFileSync(RSS_FILE, rss, 'utf8');
console.log(`\n✅ RSS feed written to: ${RSS_FILE}`);
const stats = fs.statSync(RSS_FILE);
console.log(` File size: ${(stats.size / 1024).toFixed(2)} KB`);
return 0;
} catch (error: unknown) {
console.error('❌ Error generating RSS feed:', (error as Error).message);
return 1;
}
}
// Run if called directly
Iif (import.meta.url === `file://${process.argv[1]}`) {
const exitCode = main();
process.exit(exitCode);
}
export { generateRss, validateRss, getRssArticles, escapeXml };
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