From 587c21fa0369813696641cff272f58cb554febc7 Mon Sep 17 00:00:00 2001
From: Jeff Leung <jleung@v10networks.ca>
Date: Tue, 24 Jan 2023 15:43:42 -0800
Subject: [PATCH] Initial support for Graph API E-Mail handler

---
 .../MessageHandlers/GraphSmtpHandler.cs       | 78 +++++++++++++++++++
 .../TwilioSMSReceiver.Common.csproj           |  6 ++
 .../Properties/launchSettings.json            |  5 +-
 .../Properties/launchSettings.json            |  5 +-
 4 files changed, 88 insertions(+), 6 deletions(-)
 create mode 100644 TwilioSMSReceiver.Common/MessageHandlers/GraphSmtpHandler.cs

diff --git a/TwilioSMSReceiver.Common/MessageHandlers/GraphSmtpHandler.cs b/TwilioSMSReceiver.Common/MessageHandlers/GraphSmtpHandler.cs
new file mode 100644
index 0000000..ed4e945
--- /dev/null
+++ b/TwilioSMSReceiver.Common/MessageHandlers/GraphSmtpHandler.cs
@@ -0,0 +1,78 @@
+using System;
+using Azure.Identity;
+using Microsoft.Extensions.Configuration;
+using Microsoft.Extensions.Logging;
+using Microsoft.Graph;
+using TwilioSMSReceiver.Common.Interfaces;
+using TwilioSMSReceiver.Data.Models;
+
+namespace TwilioSMSReceiver.Common.MessageHandlers
+{
+	public class GraphSmtpHandler : IMessageHandler
+	{
+        protected readonly ILogger _logger;
+        protected readonly IConfiguration _configuration;
+
+        protected GraphServiceClient BuildGraphClient()
+        {
+            var section = _configuration.GetSection("GraphSmtp");
+            var tenantId = section["tenantId"];
+            var appId = section["appId"];
+            var secret = section["secret"];
+            var scopes = new[] { "https://graph.microsoft.com/.default" };
+
+            var options = new TokenCredentialOptions
+            {
+                AuthorityHost = AzureAuthorityHosts.AzurePublicCloud
+            };
+
+            var clientSecretCredential = new ClientSecretCredential(
+                tenantId, appId, secret, options);
+
+            return new GraphServiceClient(clientSecretCredential, scopes);
+        }
+
+        public GraphSmtpHandler(ILogger logger, IConfiguration configuration)
+		{
+            _configuration = configuration;
+            _logger = logger;
+		}
+
+        public async Task<bool> RelaySms(SMSModel model)
+        {
+            var message = new Message
+            {
+                Subject = $"Received SMS from {model.SenderNumber} to {model.SenderNumber}",
+                Body = new ItemBody
+                {
+                    ContentType = BodyType.Text,
+                    Content = model.MessageContents
+                },
+                ToRecipients = new List<Recipient>()
+    {
+        new Recipient
+        {
+            EmailAddress = new EmailAddress
+            {
+                Address = "frannis@contoso.onmicrosoft.com"
+            }
+        }
+    }
+            };
+
+            try
+            {
+                var graphClient = BuildGraphClient();
+                await graphClient.Me.SendMail(message).Request().PostAsync();
+
+                return true;
+            }
+            catch (Exception e)
+            {
+                _logger.LogWarning($"Error occured {e}");
+            }
+            return false;
+        }
+    }
+}
+
diff --git a/TwilioSMSReceiver.Common/TwilioSMSReceiver.Common.csproj b/TwilioSMSReceiver.Common/TwilioSMSReceiver.Common.csproj
index bf72b9c..8a479d5 100644
--- a/TwilioSMSReceiver.Common/TwilioSMSReceiver.Common.csproj
+++ b/TwilioSMSReceiver.Common/TwilioSMSReceiver.Common.csproj
@@ -8,10 +8,16 @@
 
   <ItemGroup>
     <PackageReference Include="TeamsHook.NET" Version="0.1.0.18" />
+    <PackageReference Include="Microsoft.Graph" Version="4.51.0" />
+    <PackageReference Include="Azure.Identity" Version="1.8.1" />
   </ItemGroup>
 
   <ItemGroup>
     <ProjectReference Include="..\TwilioSMSReceiver.Data\TwilioSMSReceiver.Data.csproj" />
   </ItemGroup>
 
+  <ItemGroup>
+    <None Remove="Microsoft.Graph" />
+    <None Remove="Azure.Identity" />
+  </ItemGroup>
 </Project>
diff --git a/TwilioSMSReceiver.Web/Properties/launchSettings.json b/TwilioSMSReceiver.Web/Properties/launchSettings.json
index e7c1d31..d2bfa66 100644
--- a/TwilioSMSReceiver.Web/Properties/launchSettings.json
+++ b/TwilioSMSReceiver.Web/Properties/launchSettings.json
@@ -1,4 +1,4 @@
-{
+{
   "iisSettings": {
     "windowsAuthentication": false,
     "anonymousAuthentication": true,
@@ -10,7 +10,6 @@
   "profiles": {
     "TwilioSMSReceiver.Web": {
       "commandName": "Project",
-      "dotnetRunMessages": true,
       "launchBrowser": true,
       "applicationUrl": "https://localhost:7213;http://localhost:5213",
       "environmentVariables": {
@@ -25,4 +24,4 @@
       }
     }
   }
-}
+}
\ No newline at end of file
diff --git a/TwilioSMSReceiver/Properties/launchSettings.json b/TwilioSMSReceiver/Properties/launchSettings.json
index 603918d..8994550 100644
--- a/TwilioSMSReceiver/Properties/launchSettings.json
+++ b/TwilioSMSReceiver/Properties/launchSettings.json
@@ -1,4 +1,4 @@
-{
+{
   "$schema": "https://json.schemastore.org/launchsettings.json",
   "iisSettings": {
     "windowsAuthentication": false,
@@ -11,7 +11,6 @@
   "profiles": {
     "TwilioSMSReceiver": {
       "commandName": "Project",
-      "dotnetRunMessages": true,
       "launchBrowser": true,
       "launchUrl": "swagger",
       "applicationUrl": "https://[::]:7078;http://[::]:5078",
@@ -28,4 +27,4 @@
       }
     }
   }
-}
+}
\ No newline at end of file