1 files changed, 65 insertions, 0 deletions
diff --git a/src/scripts/user-authentication.ts b/src/scripts/user-authentication.ts
new file mode 100644
index 00000000..e9d13091
--- /dev/null
+++ b/src/scripts/user-authentication.ts
@@ -0,0 +1,65 @@
+///<reference path="../../typings/index.d.ts" />
+import * as $ from "jquery";
+
+
+// Redirect the user to the splash page, if not signed in
+if (localStorage.getItem("googleToken") === null) {
+    window.location.replace("/");
+}
+
+// Set the username in the navbar
+$("nav .user .username").text(localStorage.getItem("googleName"));
+
+
+// Set the language of the GAuth button to be English
+window["___gcfg"] = {
+    lang: 'en'
+};
+
+/**
+ * Google signin button.
+ */
+window["gapiSigninButton"] = () => {
+    gapi.signin2.render('google-signin', {
+        'scope': 'profile email',
+        'onsuccess': (googleUser) => {
+            const auth2 = gapi.auth2.getAuthInstance();
+
+            // Handle signout click
+            $("nav .user .sign-out").click(() => {
+                removeUserInfo();
+                auth2.signOut().then(() => {
+                    window.location.href = "/";
+                });
+            });
+
+            // Check if the token has expired
+            const currentTime = (new Date()).getTime() / 1000;
+
+            if (parseInt(localStorage.getItem("googleTokenExpiration")) - currentTime <= 0) {
+                auth2.signIn().then(() => {
+                    localStorage.setItem("googleToken", googleUser.getAuthResponse().id_token);
+                    const expirationTime = (new Date()).getTime() / 1000 + parseInt(googleUser.getAuthResponse().expires_in) - 5;
+                    localStorage.setItem("googleTokenExpiration", expirationTime.toString());
+                });
+            }
+        },
+        'onfailure': () => {
+            window.location.href = "/";
+            console.log("Oops, something went wrong with your Google signin... Try again?");
+        }
+    });
+};
+
+
+/**
+ * Removes session storage items.
+ */
+export function removeUserInfo() {
+    localStorage.removeItem("googleToken");
+    localStorage.removeItem("googleTokenExpiration");
+    localStorage.removeItem("googleName");
+    localStorage.removeItem("googleEmail");
+    localStorage.removeItem("userId");
+    localStorage.removeItem("simulationId");
+}