Convert to Blazor (#6)

Convert existing progress to Blazor on client and server

src/JobsJobsJobs/Shared/Result.cs

@@ -0,0 +1,64 @@
+namespace JobsJobsJobs.Shared
+{
+    /// <summary>
+    /// A result with two different possibilities
+    /// </summary>
+    /// <typeparam name="TOk">The type of the Ok result</typeparam>
+    public struct Result<TOk>
+    {
+        private readonly TOk? _okValue;
+
+        /// <summary>
+        /// Is this an Ok result?
+        /// </summary>
+        public bool IsOk { get; init; }
+
+        /// <summary>
+        /// Is this an Error result?
+        /// </summary>
+        public bool IsError
+        {
+            get => !IsOk;
+        }
+
+        /// <summary>
+        /// The Ok value
+        /// </summary>
+        public TOk Ok
+        {
+            get => _okValue!;
+        }
+
+        /// <summary>
+        /// The error value
+        /// </summary>
+        public string Error { get; set; }
+
+        /// <summary>
+        /// Constructor (inaccessible - use static creation methods)
+        /// </summary>
+        /// <param name="isOk">Whether this is an Ok result</param>
+        /// <param name="okValue">The value of the Ok result</param>
+        /// <param name="error">The error message of the Error result</param>
+        private Result(bool isOk, TOk? okValue = default, string error = "")
+        {
+            IsOk = isOk;
+            _okValue = okValue;
+            Error = error;
+        }
+
+        /// <summary>
+        /// Create an Ok result
+        /// </summary>
+        /// <param name="okValue">The value of the Ok result</param>
+        /// <returns>The Ok result</returns>
+        public static Result<TOk> AsOk(TOk okValue) => new Result<TOk>(true, okValue);
+
+        /// <summary>
+        /// Create an Error result
+        /// </summary>
+        /// <param name="error">The error message</param>
+        /// <returns>The Error result</returns>
+        public static Result<TOk> AsError(string error) => new Result<TOk>(false) { Error = error };
+    }
+}