Frontend: introducing password/cookie-based authentication for learn-sandbox

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 SANDBOX
+import {sandboxRedirect} from './ts/sandbox-redirect';
+// #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 SANDBOX
+  // This is used to redirect non AdaCore staff to the main site if
+  //  the staging site is accidentally reached
+  sandboxRedirect();
+  // #endif
 }
 
 (function(): void {

frontend/src/ts/sandbox-redirect.ts

@@ -0,0 +1,33 @@
+import {Cookies} from 'typescript-cookies'
+
+const cookies = new Cookies({
+  path: '/',
+  secure: true,
+  samesite: 'none',
+})
+
+/**
+ * Redirects the user to main learn site if not authenticated
+ */
+export function sandboxRedirect(): void {
+  /* istanbul ignore next */
+  const cookieName = "Learn_Sandbox_Authenticated";
+  const cookieValue = cookies.get(cookieName) as string;
+  const cookieReferenceValue = "true";
+
+  if (cookieValue != cookieReferenceValue) {
+    const passw = prompt("Enter site password:")
+
+    if (passw != "Ada") {
+      const msg = 'You have reached learn-sandbox, 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';
+    }
+    else
+    {
+      cookies.set(cookieName, cookieReferenceValue, {expires: 3650});
+    }
+  }
+}