From 673b0e0c4543440241c21fd6c9e8e06834ac4f95 Mon Sep 17 00:00:00 2001
From: sburman <sburman@twilio.com>
Date: Fri, 24 Nov 2023 20:55:00 +0530
Subject: [PATCH] init

---
 src/SendGrid/SendGridClientOptions.cs         | 30 +++++++++++++++++++
 .../SendgridEmailClientTests.cs               | 16 ++++++++++
 2 files changed, 46 insertions(+)
 create mode 100644 tests/SendGrid.Tests/SendgridEmailClientTests.cs

diff --git a/src/SendGrid/SendGridClientOptions.cs b/src/SendGrid/SendGridClientOptions.cs
index 290f6cfab..d9ec4a58c 100644
--- a/src/SendGrid/SendGridClientOptions.cs
+++ b/src/SendGrid/SendGridClientOptions.cs
@@ -1,4 +1,5 @@
 using System;
+using System.Collections.Generic;
 using System.Net.Http.Headers;
 
 namespace SendGrid
@@ -17,6 +18,11 @@ public SendGridClientOptions()
         }
 
         private string apiKey;
+        Dictionary<string, string> REGION_HOST_MAP = new Dictionary<string, string>
+        {
+            {"eu", "https://api.eu.sendgrid.com/"},
+            {"global", "https://api.sendgrid.com/"}
+        };
 
         /// <summary>
         /// The Twilio SendGrid API key.
@@ -36,5 +42,29 @@ public string ApiKey
                 Auth = new AuthenticationHeaderValue("Bearer", apiKey);
             }
         }
+
+        /// <summary>
+        /// Sets the data residency for the SendGrid client.
+        /// </summary>
+        /// <param name="region">The desired data residency region ("global" or "eu").</param>
+        /// <returns>The updated SendGridClientOptions instance.</returns>
+        public SendGridClientOptions SetDataResidency(string region)
+        {
+            if (string.IsNullOrWhiteSpace(region))
+            {
+                throw new ArgumentNullException(nameof(region));
+            }
+
+            if (!REGION_HOST_MAP.ContainsKey(region))
+            {
+                Console.WriteLine("Region can only be 'global' or 'eu'.");
+            }
+            else
+            {
+                Host = REGION_HOST_MAP[region];
+            }
+
+            return this;
+        }
     }
 }
diff --git a/tests/SendGrid.Tests/SendgridEmailClientTests.cs b/tests/SendGrid.Tests/SendgridEmailClientTests.cs
new file mode 100644
index 000000000..744c64662
--- /dev/null
+++ b/tests/SendGrid.Tests/SendgridEmailClientTests.cs
@@ -0,0 +1,16 @@
+namespace SendGrid.Tests
+{
+    using System;
+    using Xunit;
+
+    public class SendgridEmailClientTests
+    {
+        [Fact]
+        public void TestClientOptionsConstruction()
+        {
+            var options = new SendGridClientOptions();
+            Assert.Equal("https://api.sendgrid.com", options.Host);
+        }
+
+    }
+}