Add 'announcement' to v2 homepage api

This requires an accompanying commit in the homepages repo (see "Add announcement support").

Using `raw-loader` to import markdown files as a string works for the app-side, but didn't work well in web-side. Falling back to copying the announcement files to `dist` and reading them via `readFileSync`. Don't really like this -- will return with an alternative.

ui/redux/selectors/settings.js

@@ -82,6 +82,18 @@ export const selectHomepageMeme = (state) => {
   return homepages ? homepages['en'].meme || {} : {};
 };
 
+export const selectHomepageAnnouncement = (state) => {
+  const homepageCode = selectHomepageCode(state);
+  const homepages = window.homepages;
+  if (homepages) {
+    const news = homepages[homepageCode].announcement;
+    if (news) {
+      return news;
+    }
+  }
+  return homepages ? homepages['en'].announcement || '' : '';
+};
+
 export const selectInRegionByCode = (state, code) => {
   const hp = selectClientSetting(state, SETTINGS.HOMEPAGE);
   const lang = selectLanguage(state);

web/src/getHomepageJSON.js

@@ -1,9 +1,24 @@
+const path = require('path');
 const memo = {};
 
+const loadAnnouncements = (homepageKeys) => {
+  const fs = require('fs');
+  const announcements = {};
+
+  homepageKeys.forEach((key) => {
+    const file = path.join(__dirname, `../dist/announcement/${key.toLowerCase()}.md`);
+    const announcement = fs.readFileSync(file, 'utf8');
+    announcements[key] = announcement ? announcement.trim() : '';
+  });
+
+  return announcements;
+};
+
 // this didn't seem to help.
 if (!memo.homepageData) {
   try {
     memo.homepageData = require('../../custom/homepages/v2');
+    memo.announcements = loadAnnouncements(Object.keys(memo.homepageData));
   } catch (err) {
     console.log('getHomepageJSON:', err);
   }
@@ -30,7 +45,10 @@ const getHomepageJsonV2 = () => {
   const v2 = {};
   const homepageKeys = Object.keys(memo.homepageData);
   homepageKeys.forEach((hp) => {
-    v2[hp] = memo.homepageData[hp];
+    v2[hp] = {
+      ...memo.homepageData[hp],
+      announcement: memo.announcements[hp],
+    };
   });
   return v2;
 };

web/webpack.config.js

@@ -68,6 +68,10 @@ const copyWebpackCommands = [
     from: `${WEB_STATIC_ROOT}/pwa/`,
     to: `${DIST_ROOT}/public/pwa/`,
   },
+  {
+    from: `${STATIC_ROOT}/../custom/homepages/v2/announcement`,
+    to: `${DIST_ROOT}/announcement`,
+  },
 ];
 
 const CUSTOM_OG_PATH = `${CUSTOM_ROOT}/v2-og.png`;