Introduce new ApplicationHostOptions model for serialization (#9930)

Author: liliankasem

src/WebJobs.Script.WebHost/Controllers/HostController.cs

@@ -402,7 +402,21 @@ public async Task<IActionResult> SyncTriggers()
         public IActionResult Restart([FromServices] IScriptHostManager hostManager)
         {
             Task ignore = hostManager.RestartHostAsync();
-            return Ok(_applicationHostOptions.Value);
+
+            var hostOptionsValue = _applicationHostOptions.Value;
+            var response = new HostRestartResponse()
+            {
+                IsFileSystemReadOnly = hostOptionsValue.IsFileSystemReadOnly,
+                IsScmRunFromPackage = hostOptionsValue.IsScmRunFromPackage,
+                IsSelfHost = hostOptionsValue.IsSelfHost,
+                HasParentScope = hostOptionsValue.HasParentScope,
+                LogPath = hostOptionsValue.LogPath,
+                ScriptPath = hostOptionsValue.ScriptPath,
+                SecretsPath = hostOptionsValue.SecretsPath,
+                TestDataPath = hostOptionsValue.TestDataPath
+            };
+
+            return Ok(response);
         }
 
         /// <summary>

src/WebJobs.Script.WebHost/Models/HostRestartResponse.cs

@@ -0,0 +1,32 @@
+// Copyright (c) .NET Foundation. All rights reserved.
+// Licensed under the MIT License. See License.txt in the project root for license information.
+
+using System;
+
+/// <summary>
+/// The model used for the response message in 'admin/host/restart' API endpoint.
+/// This contains all the properties from <see cref="ScriptApplicationHostOptions"/> excluding the <see cref="IServiceProvider"/> property.
+/// </summary>
+namespace Microsoft.Azure.WebJobs.Script.WebHost.Models
+{
+    public class HostRestartResponse
+    {
+        public bool IsSelfHost { get; set; }
+
+        public string SecretsPath { get; set; }
+
+        public string ScriptPath { get; set; }
+
+        public string LogPath { get; set; }
+
+        public string TestDataPath { get; set; }
+
+        public bool HasParentScope { get; set; }
+
+        public bool IsStandbyConfiguration { get; set; }
+
+        public bool IsFileSystemReadOnly { get; set; }
+
+        public bool IsScmRunFromPackage { get; set; }
+    }
+}