New: SendGrid Support

src/NzbDrone.Core/Notifications/SendGrid/SendGridProxy.cs

@@ -0,0 +1,84 @@
+using System.Net;
+using NzbDrone.Common.Http;
+using NzbDrone.Common.Serializer;
+
+namespace NzbDrone.Core.Notifications.SendGrid
+{
+    public interface ISendGridProxy
+    {
+        void SendNotification(string title, string message, SendGridSettings settings);
+    }
+
+    public class SendGridProxy : ISendGridProxy
+    {
+        private readonly IHttpClient _httpClient;
+
+        public SendGridProxy(IHttpClient httpClient)
+        {
+            _httpClient = httpClient;
+        }
+
+        public void SendNotification(string title, string message, SendGridSettings settings)
+        {
+            try
+            {
+                var request = BuildRequest(settings, "mail/send", HttpMethod.POST);
+
+                var payload = new SendGridPayload
+                {
+                    From = new SendGridEmail
+                    {
+                        Email = settings.From
+                    }
+                };
+
+                payload.Content.Add(new SendGridContent
+                {
+                    Type = "text/plain",
+                    Value = message
+                });
+
+                var personalization = new SendGridPersonalization
+                {
+                    Subject = title,
+                };
+
+                foreach (var recipient in settings.Recipients)
+                {
+                    personalization.To.Add(new SendGridEmail
+                    {
+                        Email = recipient
+                    });
+                }
+
+                payload.Personalizations.Add(personalization);
+
+                request.SetContent(payload.ToJson());
+
+                _httpClient.Execute(request);
+            }
+            catch (HttpException ex)
+            {
+                if (ex.Response.StatusCode == HttpStatusCode.Unauthorized)
+                {
+                    throw new SendGridException("Unauthorized - AuthToken is invalid");
+                }
+
+                throw new SendGridException("Unable to connect to Gotify. Status Code: {0}", ex);
+            }
+        }
+
+        private HttpRequest BuildRequest(SendGridSettings settings, string resource, HttpMethod method)
+        {
+            var request = new HttpRequestBuilder(settings.BaseUrl).Resource(resource)
+                .SetHeader("Authorization", $"Bearer {settings.ApiKey}")
+                .Build();
+
+            request.Headers.ContentType = "application/json";
+
+            request.Method = method;
+
+            return request;
+        }
+    }
+}