From 45e86fd063dd80dd40336c75d0b0cfdd3a1519d3 Mon Sep 17 00:00:00 2001
From: Jonas Hinterdorfer <j.hinterdorfer@HTBLALeonding.onmicrosoft.com>
Date: Tue, 11 Mar 2025 21:42:48 +0100
Subject: [PATCH] made async

---
 ConsoleApp1/MailService.cs | 97 ++++++++++++++++++--------------------
 ConsoleApp1/Program.cs     | 13 ++---
 2 files changed, 52 insertions(+), 58 deletions(-)

diff --git a/ConsoleApp1/MailService.cs b/ConsoleApp1/MailService.cs
index 545529a..e013b08 100644
--- a/ConsoleApp1/MailService.cs
+++ b/ConsoleApp1/MailService.cs
@@ -3,60 +3,32 @@ using System.Net.Mail;
 
 namespace ConsoleApp1;
 
-public class MailService
+public class MailService(SmtpSettings smtpSettings)
 {
-    private readonly SmtpSettings _smtpSettings;
-
-    public MailService(SmtpSettings smtpSettings)
+    /// <summary>
+    /// Sends a plain text email to the specified recipient.
+    /// </summary>
+    /// <param name="to">The recipient's email address.</param>
+    /// <param name="subject">The subject of the email.</param>
+    /// <param name="body">The body of the email.</param>
+    public async Task SendEmailText(string to, string subject, string body)
     {
-        _smtpSettings = smtpSettings;
+        await SendEmailInternal(to, subject, body, isHtml: false);
     }
 
-    public void SendEmail(string to, string subject, string body)
+    /// <summary>
+    /// Sends an HTML email to the specified recipient using a file as the body.
+    /// </summary>
+    /// <param name="to">The recipient's email address.</param>
+    /// <param name="subject">The subject of the email.</param>
+    /// <param name="filePath">The file path of the HTML file to be used as the body of the email.</param>
+    /// <param name="replacements">Optional dictionary of placeholder replacements to be applied to the HTML body.</param>
+    public async Task SendEmailHtmlFile(string to, string subject, string filePath,
+        Dictionary<string, string>? replacements = null)
     {
-        using (var client = new SmtpClient(_smtpSettings.SmtpServer, _smtpSettings.SmtpPort))
-        {
-            client.Credentials = new NetworkCredential(_smtpSettings.SmtpUser, _smtpSettings.SmtpPassword);
-            client.EnableSsl = true;
+        string body = await File.ReadAllTextAsync(filePath);
 
-            var mailMessage = new MailMessage
-            {
-                From = new MailAddress(_smtpSettings.SmtpFrom),
-                Subject = subject,
-                Body = body,
-                IsBodyHtml = true,
-            };
-
-            mailMessage.To.Add(to);
-
-            client.Send(mailMessage);
-        }
-    }
-    
-    private void SendEmailHtml(string to, string subject, string body)
-    {
-        using var client = new SmtpClient(_smtpSettings.SmtpServer, _smtpSettings.SmtpPort);
-        client.Credentials = new NetworkCredential(_smtpSettings.SmtpUser, _smtpSettings.SmtpPassword);
-        client.EnableSsl = true;
-
-        var mailMessage = new MailMessage
-        {
-            From = new MailAddress(_smtpSettings.SmtpFrom),
-            Subject = subject,
-            Body = body,
-            IsBodyHtml = true,
-        };
-
-        mailMessage.To.Add(to);
-
-        client.Send(mailMessage);
-    }
-    
-    public void SendEmailHtmlFile(string to, string subject, string filePath, Dictionary<string, string>? replacements = null)
-    {
-        string body = System.IO.File.ReadAllText(filePath);
-        
-        if (replacements is not null)
+        if (replacements != null)
         {
             foreach (var replacement in replacements)
             {
@@ -64,7 +36,32 @@ public class MailService
             }
         }
 
-        SendEmailHtml(to, subject, body);
+        await SendEmailInternal(to, subject, body, isHtml: true);
+    }
+
+    /// <summary>
+    /// Sends an email to the specified recipient.
+    /// </summary>
+    /// <param name="to">The recipient's email address.</param>
+    /// <param name="subject">The subject of the email.</param>
+    /// <param name="body">The body of the email.</param>
+    /// <param name="isHtml">Indicates whether the body of the email is HTML.</param>
+    private async Task SendEmailInternal(string to, string subject, string body, bool isHtml)
+    {
+        using var client = new SmtpClient(smtpSettings.SmtpServer, smtpSettings.SmtpPort);
+        
+        client.Credentials = new NetworkCredential(smtpSettings.SmtpUser, smtpSettings.SmtpPassword);
+        client.EnableSsl = true;
+
+        var mailMessage = new MailMessage
+        {
+            From = new MailAddress(smtpSettings.SmtpFrom),
+            Subject = subject,
+            Body = body,
+            IsBodyHtml = isHtml
+        };
+
+        mailMessage.To.Add(to);
+        await client.SendMailAsync(mailMessage);
     }
-  
 }
\ No newline at end of file
diff --git a/ConsoleApp1/Program.cs b/ConsoleApp1/Program.cs
index 7ef0632..a62a195 100644
--- a/ConsoleApp1/Program.cs
+++ b/ConsoleApp1/Program.cs
@@ -1,12 +1,10 @@
-using System;
-using System.IO;
-using System.Text.Json;
+using System.Text.Json;
 
 namespace ConsoleApp1
 {
     class Program
     {
-        static void Main(string[] args)
+        static async Task Main()
         {
             string jsonFilePath = "appsettings.json";
             string jsonString = File.ReadAllText(jsonFilePath);
@@ -25,16 +23,15 @@ namespace ConsoleApp1
             }
             
             MailService mailService = new MailService(smtpSettings);
-            mailService.SendEmail("user@user.com", "Hello World", "Hello World from C#!");
-            Console.WriteLine("Email sent!");
+            await mailService.SendEmailText("user@user.com", "Hello World", "Hello World from C#!");
             
             Dictionary<string, string> replacements = new Dictionary<string, string>
             {
                 { "name", "Jonas" }
             };
             
-            mailService.SendEmailHtmlFile("user@user.com" , "Hello World", "email.html", replacements);
-            Console.WriteLine("Email sent!");
+            await mailService.SendEmailHtmlFile("user@user.com" , "Hello World", "email.html", replacements);
+
 
         }
     }