chore: Add date range for banner expiry

Author: nschonni

layouts/index.hbs

@@ -18,7 +18,7 @@
           </div>
         {{/if}}
 
-        {{#if site.banners.index.visible}}
+        {{#if ( betweenDate site.banners.index.startDate site.banners.index.endDate ) }}
           <p class="home-version home-version-banner">
             <a href="{{ site.banners.index.link }}">{{ site.banners.index.text }}</a>
           </p>

locale/en/site.json

@@ -160,7 +160,8 @@
   },
   "banners": {
     "index": {
-      "visible": true,
+      "startDate": "2021-07-01T16:00:00.000Z",
+      "endDate": "2021-07-30T16:00:00.000Z",
       "text": "New security releases now available for 16.x, 14.x, and 12.x release lines",
       "link": "blog/vulnerability/july-2021-security-releases/"
     },

scripts/helpers/betweenDate.js

@@ -0,0 +1,24 @@
+'use strict'
+
+module.exports = (startDate, endDate) => {
+  const parsedStartDate = new Date(startDate)
+  const parsedEndDate = new Date(endDate)
+  const now = Date.now()
+
+  if (!(parsedStartDate instanceof Date && isFinite(parsedStartDate))) {
+    // If date is invalid (but not undefined) log error for debugging
+    if (startDate && process.env.NODE_ENV !== 'test') {
+      console.error('[handlebars] betweenDate - Invalid start date:', startDate)
+    }
+    return false
+  }
+  if (!(parsedEndDate instanceof Date && isFinite(parsedEndDate))) {
+    // If date is invalid (but not undefined) log error for debugging
+    if (endDate && process.env.NODE_ENV !== 'test') {
+      console.error('[handlebars] betweenDate - Invalid end date:', endDate)
+    }
+    return false
+  }
+
+  return parsedStartDate < now && now < parsedEndDate
+}