Frontend: reintroducing site redirection for "staging" version

Author: gusthoff

frontend/src/index.ts

@@ -4,6 +4,10 @@ import {getElemsByClass, getElemById} from './ts/dom-utils';
 import {widgetFactory} from './ts/widget';
 import {scrollTop} from './ts/scrolltop';
 
+// #if STAGING
+import {stagingRedirect} from './ts/staging';
+// #endif
+
 /**
  * Entrypoint
  *  The main entrypoint for the application
@@ -17,6 +21,12 @@ function entrypoint(): void {
   // register scroll to top btn functionality
   const btn = getElemById('scrollToTopBtn');
   scrollTop(btn as HTMLButtonElement);
+
+  // #if STAGING
+  // This is used to redirect non AdaCore staff to the main site if
+  //  the staging site is accidentally reached
+  stagingRedirect();
+  // #endif
 }
 
 (function(): void {

frontend/src/ts/staging.ts

@@ -0,0 +1,17 @@
+import Cookies from 'js-cookie';
+
+/**
+ * Redirects the user to main learn site if not AdaCore employee
+ *
+ * @export
+ */
+export function stagingRedirect(): void {
+  /* istanbul ignore next */
+  if (!Cookies.get('AdaCore_staff')) {
+    const msg = 'You have reached learn-staging, the learn testing site. ' +
+    'This is reserved for testers only. You will be directed to the main ' +
+    'learn.adacore.com site after pressing OK.';
+    alert(msg);
+    window.location.href = 'http://learn.adacore.com';
+  }
+}