Login on reload

To get a new access_token if the old one has expired. Should fix issue #36.

src/models/user.js

@@ -1,8 +1,31 @@
 export default class User {
-    constructor(server, username, password, is_guest) {
-        this.server = server;
-        this.username = username;
+    constructor(home_server, user_id, password, is_guest) {
+        this.home_server = home_server;
+        this.user_id = user_id;
         this.password = password;
         this.is_guest = is_guest || false
     }
+
+    normalize = function() {
+        if (this.user_id.startsWith('@') && this.user_id.includes(':')) {
+            const parts = this.user_id.split(":");
+            this.user_id = parts[0].substring(1);
+            this.home_server = "https://" + parts[1];
+        }
+    };
+
+    static homeServerUrl = function(home_server) {
+        if (home_server && !home_server.startsWith("https://")) {
+            return "https://" + home_server;
+        }
+        return home_server;
+    };
+
+    static localPart(user_id) {
+        if (user_id && user_id.startsWith('@') && user_id.includes(':')) {
+            const parts = user_id.split(":");
+            return parts[0].substring(1);
+        }
+        return user_id;
+    }
 }