Convert to Blazor (#6)

Convert existing progress to Blazor on client and server

src/JobsJobsJobs/Client/AppState.cs

@@ -0,0 +1,52 @@
+using JobsJobsJobs.Shared;
+using System;
+
+namespace JobsJobsJobs.Client
+{
+    /// <summary>
+    /// Information about a user
+    /// </summary>
+    public record UserInfo(CitizenId Id, string Name);
+
+    /// <summary>
+    /// Client-side application state for Jobs, Jobs, Jobs
+    /// </summary>
+    public class AppState
+    {
+        public event Action OnChange = () => { };
+
+        private UserInfo? _user = null;
+
+        /// <summary>
+        /// The information of the currently logged-in user
+        /// </summary>
+        public UserInfo? User
+        {
+            get => _user;
+            set
+            {
+                _user = value;
+                NotifyChanged();
+            }
+        }
+
+        private string _jwt = "";
+
+        /// <summary>
+        /// The JSON Web Token (JWT) for the currently logged-on user
+        /// </summary>
+        public string Jwt
+        {
+            get => _jwt;
+            set
+            {
+                _jwt = value;
+                NotifyChanged();
+            }
+        }
+
+        public AppState() { }
+
+        private void NotifyChanged() => OnChange.Invoke();
+    }
+}