feature: email service and configuration

2021-01-10 13:57:25 +11:00
parent af4a94870e
commit 806aadd161
14 changed files with 1229 additions and 186 deletions
@@ -0,0 +1,109 @@
+using Disco.Data.Configuration;
+using Disco.Data.Repository;
+using Disco.Models.Services.Messaging;
+using System;
+using System.Net;
+using System.Net.Mail;
+
+namespace Disco.Services.Messaging
+{
+    public static class EmailService
+    {
+        private static string smtpServer;
+        private static int smtpPort;
+        private static string smtpFromAddress;
+        private static bool smtpEnableSsl;
+        private static string smtpUsername;
+        private static string smtpPassword;
+
+        public static bool IsConfigured { get; private set; }
+
+        static EmailService()
+        {
+            using (var database = new DiscoDataContext())
+            {
+                Update(database.DiscoConfiguration);
+            }
+        }
+
+        public static void ValidateConfiguration(string smtpServer, int smtpPort, string fromAddress, bool enableSsl, string username, string password)
+        {
+            // if smtpServer is null, we aren't configured (emailing is disabled)
+            if (!string.IsNullOrWhiteSpace(smtpServer))
+            {
+                // validate
+                if (smtpPort <= 0)
+                    throw new ArgumentOutOfRangeException(nameof(smtpPort), "Invalid SMTP port specified");
+                if (string.IsNullOrWhiteSpace(fromAddress))
+                    throw new ArgumentOutOfRangeException(nameof(fromAddress), "From Address is required");
+                // try parse FromAddress
+                new MailAddress(fromAddress);
+            }
+        }
+
+        public static void Update(SystemConfiguration systemConfiguration)
+        {
+            smtpServer = systemConfiguration.EmailSmtpServer;
+            smtpPort = systemConfiguration.EmailSmtpPort;
+            smtpEnableSsl = systemConfiguration.EmailEnableSsl;
+            smtpFromAddress = systemConfiguration.EmailFromAddress;
+            smtpUsername = systemConfiguration.EmailUsername;
+            smtpPassword = systemConfiguration.EmailPassword;
+
+            IsConfigured =
+                !string.IsNullOrWhiteSpace(smtpServer) &&
+                smtpPort > 0 &&
+                !string.IsNullOrWhiteSpace(smtpFromAddress);
+        }
+
+        public static void SendEmail(Email email)
+        {
+            if (!IsConfigured)
+                throw new InvalidOperationException("Unable to send email, the email service has not been configured.");
+
+            var message = new MailMessage()
+            {
+                Subject = email.Subject,
+                IsBodyHtml = email.IsBodyHtml,
+                Body = email.Body,
+            };
+
+            if (!string.IsNullOrWhiteSpace(email.From))
+                message.From = new MailAddress(email.From);
+            else
+                message.From = new MailAddress(smtpFromAddress);
+
+            if (email.To.Count > 0)
+            {
+                foreach (var recipient in email.To)
+                    message.To.Add(recipient);
+            }
+            if (email.CC.Count > 0)
+            {
+                foreach (var recipient in email.CC)
+                    message.CC.Add(recipient);
+            }
+            if (email.BCC.Count > 0)
+            {
+                foreach (var recipient in email.BCC)
+                    message.Bcc.Add(recipient);
+            }
+
+            using (var smtpClient = new SmtpClient(smtpServer, smtpPort))
+            {
+                smtpClient.EnableSsl = smtpEnableSsl;
+                if (!string.IsNullOrWhiteSpace(smtpUsername))
+                    smtpClient.Credentials = new NetworkCredential(smtpUsername, smtpPassword);
+
+                smtpClient.Send(message);
+            }
+        }
+
+        public static void SendTestEmail(string recipient)
+        {
+            var email = new Email(recipient, "Disco ICT Test Email", @"Disco ICT has successfully been configured to send to this recipient.");
+            SendEmail(email);
+        }
+
+    }
+}