Fix redirect urls when api gateway is enabled (#2697)

Author: rhysyngsun

frontend/public/src/lib/auth.js

@@ -58,6 +58,11 @@ export const generateLoginRedirectUrl = () => {
   const { pathname, search, hash } = window.location
 
   const next = `${pathname}${search}${hash}`
+
+  if (SETTINGS.api_gateway_enabled) {
+    window.location = `/login/?${qs.stringify({ next })}`
+    return
+  }
   return `${routes.login.begin}?${qs.stringify({ next })}`
 }
 

frontend/public/src/lib/auth_test.js

@@ -23,6 +23,18 @@ describe("auth lib function", () => {
     )
   })
 
+  it("generateLoginRedirectUrl should set window.location to /login/ w/ a redirect url", () => {
+    global.SETTINGS = {
+      api_gateway_enabled: true
+    }
+    window.location = "/protected/route?var=abc"
+    generateLoginRedirectUrl()
+    assert.equal(
+      window.location.toString(),
+      "http://fake/login/?next=%2Fprotected%2Froute%3Fvar%3Dabc"
+    )
+  })
+
   describe("handleAuthResponse", () => {
     let history, sandbox
 

frontend/staff-dashboard/src/pages/login.tsx

@@ -1,8 +1,9 @@
 export default function LoginPage() {
-    const sign_in_url = (new URL(DATASOURCES_CONFIG.mitxOnline)).origin + "/signin/?next=/staff-dashboard/";
+  const sign_in_url =
+    new URL(DATASOURCES_CONFIG.mitxOnline).origin +
+    "/signin/?next=/staff-dashboard/";
 
-    document.location = sign_in_url;
+  document.location = sign_in_url;
 
-    return (<>Please wait while we redirect you to the sign in page...</>);
-
-};
+  return <>Please wait while we redirect you to the sign in page...</>;
+}