Add SMTP support

ProjectLighthouse.sln.DotSettings

@@ -88,6 +88,8 @@
 	<s:String x:Key="/Default/CodeStyle/Naming/CSharpNaming/Abbreviations/=PS/@EntryIndexedValue">PS</s:String>
 	<s:String x:Key="/Default/CodeStyle/Naming/CSharpNaming/Abbreviations/=PSP/@EntryIndexedValue">PSP</s:String>
 	<s:String x:Key="/Default/CodeStyle/Naming/CSharpNaming/Abbreviations/=RPCS/@EntryIndexedValue">RPCS</s:String>
+	<s:String x:Key="/Default/CodeStyle/Naming/CSharpNaming/Abbreviations/=SMTP/@EntryIndexedValue">SMTP</s:String>
+	<s:String x:Key="/Default/CodeStyle/Naming/CSharpNaming/Abbreviations/=TLS/@EntryIndexedValue">TLS</s:String>
 	<s:String x:Key="/Default/CodeStyle/Naming/CSharpNaming/PredefinedNamingRules/=Method/@EntryIndexedValue">&lt;Policy Inspect="True" Prefix="" Suffix="" Style="AaBb"&gt;&lt;ExtraRule Prefix="" Suffix="" Style="aaBb" /&gt;&lt;/Policy&gt;</s:String>
 	<s:String x:Key="/Default/CodeStyle/Naming/CSharpNaming/PredefinedNamingRules/=PrivateConstants/@EntryIndexedValue">&lt;Policy Inspect="True" Prefix="" Suffix="" Style="aaBb" /&gt;</s:String>
 	<s:String x:Key="/Default/CodeStyle/Naming/CSharpNaming/PredefinedNamingRules/=PrivateStaticReadonly/@EntryIndexedValue">&lt;Policy Inspect="True" Prefix="" Suffix="" Style="aaBb" /&gt;</s:String>

ProjectLighthouse/Helpers/SMTPHelper.cs

@@ -0,0 +1,48 @@
+using System;
+using System.Net;
+using System.Net.Mail;
+using LBPUnion.ProjectLighthouse.Types.Settings;
+
+namespace LBPUnion.ProjectLighthouse.Helpers;
+
+public static class SMTPHelper
+{
+    private static readonly SmtpClient client;
+    private static readonly MailAddress fromAddress;
+
+    static SMTPHelper()
+    {
+        if (!ServerSettings.Instance.SMTPEnabled) return;
+
+        client = new SmtpClient(ServerSettings.Instance.SMTPHost, ServerSettings.Instance.SMTPPort)
+        {
+            EnableSsl = ServerSettings.Instance.SMTPSsl,
+            Credentials = new NetworkCredential(ServerSettings.Instance.SMTPFromAddress, ServerSettings.Instance.SMTPPassword),
+        };
+
+        fromAddress = new MailAddress(ServerSettings.Instance.SMTPFromAddress, ServerSettings.Instance.SMTPFromName);
+    }
+
+    public static bool SendEmail(string recipientAddress, string subject, string body)
+    {
+        if (!ServerSettings.Instance.SMTPEnabled) return false;
+
+        MailMessage message = new(fromAddress, new MailAddress(recipientAddress))
+        {
+            Subject = subject,
+            Body = body,
+        };
+
+        try
+        {
+            client.Send(message);
+        }
+        catch(Exception e)
+        {
+            Console.WriteLine(e);
+            return false;
+        }
+
+        return true;
+    }
+}

ProjectLighthouse/Types/Settings/ServerSettings.cs

@@ -12,7 +12,7 @@ namespace LBPUnion.ProjectLighthouse.Types.Settings;
 [Serializable]
 public class ServerSettings
 {
-    public const int CurrentConfigVersion = 22; // MUST BE INCREMENTED FOR EVERY CONFIG CHANGE!
+    public const int CurrentConfigVersion = 23; // MUST BE INCREMENTED FOR EVERY CONFIG CHANGE!
     private static FileSystemWatcher fileWatcher;
     static ServerSettings()
     {
@@ -162,6 +162,24 @@ public class ServerSettings
 
     public string ServerListenUrl { get; set; } = "http://localhost:10060";
 
+    #region SMTP
+
+    public bool SMTPEnabled { get; set; }
+
+    public string SMTPHost { get; set; } = "";
+
+    public int SMTPPort { get; set; } = 587;
+
+    public string SMTPFromAddress { get; set; } = "lighthouse@example.com";
+
+    public string SMTPFromName { get; set; } = "Project Lighthouse";
+
+    public string SMTPPassword { get; set; } = "";
+
+    public bool SMTPSsl { get; set; } = true;
+
+    #endregion
+
     #region Meta
 
     [NotNull]