1 files changed, 57 insertions, 0 deletions
diff --git a/frontend/src/auth/index.js b/frontend/src/auth/index.js
new file mode 100644
index 00000000..83c27b27
--- /dev/null
+++ b/frontend/src/auth/index.js
@@ -0,0 +1,57 @@
+import { LOG_IN_SUCCEEDED, LOG_OUT } from "../actions/auth";
+import { DELETE_CURRENT_USER_SUCCEEDED } from "../actions/users";
+
+const getAuthObject = () => {
+  const authItem = localStorage.getItem("auth");
+  if (!authItem || authItem === "{}") {
+    return undefined;
+  }
+  return JSON.parse(authItem);
+};
+
+export const userIsLoggedIn = () => {
+  const authObj = getAuthObject();
+
+  if (!authObj || !authObj.googleId) {
+    return false;
+  }
+
+  const currentTime = new Date().getTime();
+  return parseInt(authObj.expiresAt, 10) - currentTime > 0;
+};
+
+export const getAuthToken = () => {
+  const authObj = getAuthObject();
+  if (!authObj) {
+    return undefined;
+  }
+
+  return authObj.authToken;
+};
+
+export const saveAuthLocalStorage = payload => {
+  localStorage.setItem("auth", JSON.stringify(payload));
+};
+
+export const clearAuthLocalStorage = () => {
+  localStorage.setItem("auth", "");
+};
+
+export const authRedirectMiddleware = store => next => action => {
+  switch (action.type) {
+    case LOG_IN_SUCCEEDED:
+      saveAuthLocalStorage(action.payload);
+      window.location.href = "/simulations";
+      break;
+    case LOG_OUT:
+    case DELETE_CURRENT_USER_SUCCEEDED:
+      clearAuthLocalStorage();
+      window.location.href = "/";
+      break;
+    default:
+      next(action);
+      return;
+  }
+
+  next(action);
+};