More work on post registration form

frontend-reactive/app/services/auth.ts

@@ -109,6 +109,27 @@ export default class AuthService extends Service {
       return false;
     }
   }
+
+  // Check if a given username exist on the server
+  // Note: The server enforces this check itself during both registration and login
+  // but provides the information too so that frontends can provide a better UX
+  async doesUsernameExist(username: string): Promise<boolean> {
+    // TODO: Make API call to check if username/handle is already in use
+    return true;
+  }
+
+  // Check if a given username is allowed to log in.
+  // This includes a check for the existence of the username in the first place
+  // A username may not log in for various reasons, two of which are the account not being approved yet
+  // or the account being barred login from an admin
+  // Note: The server enforces this check itself during login. However, it also provides an API endpoint
+  // for performing this check to allow frontends to have a better UX
+  async canUsernameLogin(username: string): Promise<boolean> {
+    // Can't login into a non-existing account
+    if (!(await this.doesUsernameExist(username))) return false;
+    // TODO: Make API call to check if username is allowed to login
+    return true;
+  }
 }
 
 // Don't remove this declaration: this is what enables TypeScript to resolve