reinstate a simplified findPage()

lib/find-page.js

@@ -0,0 +1,17 @@
+const { getLanguageCode } = require('./patterns')
+
+module.exports = function findPage (href, pageMap, redirects) {
+  // remove any fragments
+  href = href.replace(/#.*$/, '')
+
+  // find the page
+  const page = pageMap[href] || pageMap[redirects[href]]
+  if (page) return page
+
+  // get the current language
+  const currentLang = getLanguageCode.test(href) ? href.match(getLanguageCode)[1] : 'en'
+
+  // try to fall back to English if the translated page can't be found
+  const englishHref = href.replace(`/${currentLang}/`, '/en/')
+  return pageMap[englishHref] || pageMap[redirects[englishHref]]
+}