API Updates

Fixes #2011
Fixes #1376
Fixes #1379

Co-Authored-By: Mark McDowall <markus101@users.noreply.github.com>

src/Readarr.Http/Ping/PingController.cs

@@ -0,0 +1,39 @@
+using System;
+using Microsoft.AspNetCore.Http;
+using Microsoft.AspNetCore.Mvc;
+using NzbDrone.Core.Configuration;
+
+namespace Readarr.Http.Ping
+{
+    public class PingController : Controller
+    {
+        private readonly IConfigRepository _configRepository;
+
+        public PingController(IConfigRepository configRepository)
+        {
+            _configRepository = configRepository;
+        }
+
+        [HttpGet("/ping")]
+        [Produces("application/json")]
+        public ActionResult<PingResource> GetStatus()
+        {
+            try
+            {
+                _configRepository.All();
+            }
+            catch (Exception)
+            {
+                return StatusCode(StatusCodes.Status500InternalServerError, new PingResource
+                {
+                    Status = "Error"
+                });
+            }
+
+            return StatusCode(StatusCodes.Status200OK, new PingResource
+            {
+                Status = "OK"
+            });
+        }
+    }
+}

src/Readarr.Http/Ping/PingResource.cs

@@ -0,0 +1,7 @@
+namespace Readarr.Http.Ping
+{
+    public class PingResource
+    {
+        public string Status { get; set; }
+    }
+}