feat(calendar): show regional holidays and observances

worker/index.js

@@ -15,6 +15,33 @@ async function bingMetadata() {
 function headers(type, cache = "public, max-age=3600") { return { "content-type": type, "cache-control": cache }; }
 function userId(request) { return request.headers.get("oai-authenticated-user-id"); }
 
+async function holidayFeed(url) {
+  const country = url.searchParams.get('country') || '';
+  const year = Number(url.searchParams.get('year'));
+  if (!/^[A-Z]{2}$/.test(country) || !Number.isInteger(year) || year < 2024 || year > 2030) return Response.json({ error: 'Unsupported holiday country or year' }, { status: 400 });
+  try {
+    const response = await fetch(`https://openworkdays.com/api/v1/${country.toLowerCase()}/${year}.json`);
+    if (!response.ok) throw new Error(`Holiday source returned ${response.status}`);
+    const data = await response.json();
+    if (data.code !== country || data.year !== year || !Array.isArray(data.holidays)) throw new Error('Unexpected holiday data');
+    const validDate = value => typeof value === 'string' && /^\d{4}-\d{2}-\d{2}$/.test(value) && value.startsWith(`${year}-`);
+    const holidays = data.holidays.filter(item => validDate(item.date) && typeof item.name === 'string').map(item => ({ date: item.date, name: item.name.slice(0, 160), observed: item.observed === true, estimated: item.estimated === true }));
+    const workingDays = (data.working_weekend_days || []).filter(validDate);
+    return Response.json({ country, year, holidays, workingDays, source: 'OpenWorkdays' }, { headers: { 'cache-control': 'public, max-age=43200' } });
+  } catch { return Response.json({ error: 'Holiday source unavailable' }, { status: 502, headers: { 'cache-control': 'no-store' } }); }
+}
+
+async function holidayCountries() {
+  try {
+    const response = await fetch('https://openworkdays.com/api/v1/countries.json');
+    if (!response.ok) throw new Error(`Holiday source returned ${response.status}`);
+    const data = await response.json();
+    const countries = (data.countries || []).filter(item => /^[A-Z]{2}$/.test(item.code) && typeof item.name === 'string').map(item => ({ code: item.code, name: item.name.slice(0, 100) }));
+    if (!countries.length) throw new Error('No countries available');
+    return Response.json({ countries }, { headers: { 'cache-control': 'public, max-age=86400' } });
+  } catch { return Response.json({ error: 'Holiday country list unavailable' }, { status: 502, headers: { 'cache-control': 'no-store' } }); }
+}
+
 function loginPage(request) {
   const preferred = (request.headers.get("accept-language") || "en").split(",").map(part => part.split(";")[0].trim().toLowerCase());
   const code = preferred.map(value => {
@@ -34,6 +61,8 @@ export default {
   async fetch(request, env) {
     const url = new URL(request.url);
     const id = userId(request);
+    if (url.pathname === '/api/holidays') return holidayFeed(url);
+    if (url.pathname === '/api/holiday-countries') return holidayCountries();
     if (["/api/lifeos-state", "/api/lifeos-initialize", "/api/lifeos-sync"].includes(url.pathname)) return cloudApi(request, env, id, url.pathname);
     if (url.pathname.startsWith("/api/db-admin/")) return dbAdminApi(request, env, id, url.pathname);
     try {