Add JRPC API, reworked Login and User pages

Backend/src/helper/login.ts

@@ -0,0 +1,29 @@
+import { SessionContext } from "../api/jrpc";
+
+export function requireLoginState(ctx: SessionContext, validated: boolean = true, special: boolean = false): boolean {
+   if (!ctx.user) return false;
+   if (validated && !ctx.session.validated) return false;
+
+   if (special) {
+      //TODO: Implement something...
+   }
+
+   return true;
+}
+
+export function RequireLogin(validated = true, special = false) {
+   return function (target: any, propertyKey: string, descriptor: PropertyDescriptor) {
+      let original = descriptor.value;
+
+      descriptor.value = function (...args: any[]) {
+         let ctx = args[args.length - 1] as SessionContext;
+         if (!ctx) throw new Error("Invalid request");
+
+         if (!requireLoginState(ctx, validated, special)) {
+            throw new Error("Not logged in");
+         }
+
+         return original.apply(this, args);
+      }
+   }
+}