Added UI to test email settings

src/Orchard.Web/Modules/Orchard.Email/Controllers/EmailAdminController.cs

@@ -0,0 +1,63 @@
+using System;
+using System.Collections.Generic;
+using System.Web.Mvc;
+using Orchard.Email.Services;
+using Orchard.Localization;
+using Orchard.Logging;
+using Orchard.UI.Admin;
+
+namespace Orchard.Email.Controllers {
+    [Admin]
+    public class EmailAdminController : Controller {
+        private readonly ISmtpChannel _smtpChannel;
+
+        public EmailAdminController(ISmtpChannel smtpChannel) {
+            _smtpChannel = smtpChannel;
+            T = NullLocalizer.Instance;
+        }
+
+        public Localizer T { get; set; }
+
+        public ActionResult TestMailSettings(string to, string subject, string body) {
+            ILogger logger = null;
+            try {
+                var fakeLogger = new FakeLogger();
+                var smtpChannelComponent = _smtpChannel as Component;
+                if (smtpChannelComponent != null) {
+                    logger = smtpChannelComponent.Logger;
+                    smtpChannelComponent.Logger = fakeLogger;
+                }
+                _smtpChannel.Process(new Dictionary<string, object> {
+                    {"Recipients", to},
+                    {"Subject", subject},
+                    {"Body", body}
+                });
+                if (!string.IsNullOrEmpty(fakeLogger.Message)) {
+                    return Json(new { error = fakeLogger.Message });
+                }
+                return Json(new {status = T("Message sent").Text});
+            }
+            catch (Exception e) {
+                return Json(new {error = e.Message});
+            }
+            finally {
+                var smtpChannelComponent = _smtpChannel as Component;
+                if (smtpChannelComponent != null) {
+                    smtpChannelComponent.Logger = logger;
+                }
+            }
+        }
+
+        private class FakeLogger : ILogger {
+            public string Message { get; set; }
+
+            public bool IsEnabled(LogLevel level) {
+                return true;
+            }
+
+            public void Log(LogLevel level, Exception exception, string format, params object[] args) {
+                Message = exception == null ? format : exception.Message;
+            }
+        }
+    }
+}