From 53f29bac911b13b2bef0125de22773bf26ce5a90 Mon Sep 17 00:00:00 2001
From: Joe Carstairs <jcarstairs@scottlogic.com>
Date: Tue, 15 Aug 2023 19:15:27 +0100
Subject: Adds homepage

---
 src/lib/newsUtils.ts | 35 +++++++++++++++++++++++++++++++++++
 1 file changed, 35 insertions(+)
 create mode 100644 src/lib/newsUtils.ts

(limited to 'src/lib')

diff --git a/src/lib/newsUtils.ts b/src/lib/newsUtils.ts
new file mode 100644
index 0000000..ededb52
--- /dev/null
+++ b/src/lib/newsUtils.ts
@@ -0,0 +1,35 @@
+import type Locale from '$types/Locale';
+import { CollectionEntry, getCollection } from 'astro:content';
+
+export async function getMostRecentNewsItem(locale: Locale) {
+  const allNews = await getCollection('news');
+  const allNewsInLocale = allNews.filter((item) => isNewsItemInLocale(item, locale));
+  const someNewsItem = allNewsInLocale.at(0);
+  if (!someNewsItem) {
+    return null;
+  }
+  return allNewsInLocale.reduce((prev, curr) => (isBefore(curr, prev) ? curr : prev), someNewsItem);
+}
+
+export function isNewsItemInLocale(newsItem: CollectionEntry<'news'>, locale: Locale) {
+  const srcPath = newsItem.id;
+  const newsItemLocale = srcPath.slice(0, srcPath.indexOf('/'));
+  return newsItemLocale === locale;
+}
+
+function isBefore(item1: CollectionEntry<'news'>, item2: CollectionEntry<'news'>) {
+  const date1 = dateOf(item1);
+  const date2 = dateOf(item2);
+  if (!date2) {
+    return false;
+  }
+  if (!date1) {
+    return true;
+  }
+  return date1.valueOf() < date2.valueOf();
+}
+
+function dateOf(newsItem: CollectionEntry<'news'>) {
+  const match = newsItem.id.match(/(?<=(en-GB|sco))\/(\d\d\d\d-\d\d-\d\d)/)?.[2];
+  return match ? new Date(match) : null;
+}
-- 
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