.NET 8 and new C# syntax features

Author: mcmonkey4eva

CommandHandlers/CoreCommands.cs

@@ -9,16 +9,10 @@
 namespace DiscordBotBase.CommandHandlers
 {
     /// <summary>Commands that most bots need.</summary>
-    public class CoreCommands : UserCommands
+    public class CoreCommands(Func<IUser, bool> isUserAdmin) : UserCommands
     {
-        /// <summary>Constructs the core commands helper.</summary>
-        public CoreCommands(Func<IUser, bool> isUserAdmin)
-        {
-            UserAdminCheckMethod = isUserAdmin;
-        }
-
         /// <summary>Method to check if the user is an admin.</summary>
-        public Func<IUser, bool> UserAdminCheckMethod;
+        public Func<IUser, bool> UserAdminCheckMethod = isUserAdmin;
 
         /// <summary>Bot restart admin command.</summary>
         public void CMD_Restart(CommandData command)

ConnectionMonitor.cs

@@ -16,17 +16,11 @@
 
 namespace DiscordBotBase
 {
-    /// <summary>Helper to monitor a Discord bot's connectivity.</summary>
-    public class ConnectionMonitor
+    /// <summary>Helper to monitor a Discord bot's connectivity. Call <see cref="StartMonitorLoop"/> to start the monitor loop.</summary>
+    public class ConnectionMonitor(DiscordBot bot)
     {
         /// <summary>The bot to monitor.</summary>
-        public DiscordBot Bot;
-
-        /// <summary>Initializes the connection monitor. Call <see cref="StartMonitorLoop"/> to start the monitor loop.</summary>
-        public ConnectionMonitor(DiscordBot bot)
-        {
-            Bot = bot;
-        }
+        public DiscordBot Bot = bot;
 
         /// <summary>Whether the bot has ever connected to Discord (since this instance of the class was started).</summary>
         public bool ConnectedOnce = false;
@@ -69,7 +63,7 @@ public void ForceRestartBot()
             {
                 Bot.Shutdown();
             });
-            DiscordBotBaseHelper.LaunchBotThread(Array.Empty<string>(),  Bot.ClientConfig);
+            DiscordBotBaseHelper.LaunchBotThread([], Bot.ClientConfig);
         }
 
         /// <summary>Lock object for monitor variables.</summary>

DiscordBot.cs

@@ -85,8 +85,8 @@ public void Respond(IUserMessage message, bool outputUnknowns, bool wasMentioned
                 }
                 string[] messageDataSplit = messageText.Split(' ');
                 StringBuilder resultBuilder = new(messageText.Length);
-                List<string> argsCleaned = new();
-                List<string> argsRaw = new();
+                List<string> argsCleaned = [];
+                List<string> argsRaw = [];
                 foreach (string originalArg in messageDataSplit)
                 {
                     if (originalArg.Contains("<@") && originalArg.Contains('>'))
@@ -114,7 +114,7 @@ public void Respond(IUserMessage message, bool outputUnknowns, bool wasMentioned
                 string commandNameLowered = argsCleaned[0].ToLowerFast();
                 argsCleaned.RemoveAt(0);
                 argsRaw.RemoveAt(0);
-                CommandData commandData = new() { Message = message, CleanedArguments = argsCleaned.ToArray(), RawArguments = argsRaw.ToArray(), WasBotMention = wasMentioned, Bot = this };
+                CommandData commandData = new() { Message = message, CleanedArguments = [.. argsCleaned], RawArguments = [.. argsRaw], WasBotMention = wasMentioned, Bot = this };
                 if (ChatCommands.TryGetValue(commandNameLowered, out Action<CommandData> commandHandlerMethod))
                 {
                     commandHandlerMethod.Invoke(commandData);

DiscordBotBaseHelper.cs

@@ -41,7 +41,7 @@ public static void BotThread(Object obj)
             {
                 Console.WriteLine("Discord crash: " + ex.ToString());
                 Thread.Sleep(10 * 1000);
-                LaunchBotThread(Array.Empty<string>(), CurrentBot.ClientConfig);
+                LaunchBotThread([], CurrentBot.ClientConfig);
             }
         }
     }

DiscordMessageCache.cs

@@ -10,20 +10,13 @@
 namespace DiscordBotBase
 {
     /// <summary>Helper for caching Discord messages.</summary>
-    public class DiscordMessageCache
+    public class DiscordMessageCache(DiscordBot _bot, int size)
     {
         /// <summary>How many messages to store per text channel.</summary>
-        public int MessagesPerChannel;
+        public int MessagesPerChannel = size;
 
         /// <summary>The backing Discord bot.</summary>
-        public DiscordBot Bot;
-
-        /// <summary>Construct the cache instance.</summary>
-        public DiscordMessageCache(DiscordBot _bot, int size)
-        {
-            Bot = _bot;
-            MessagesPerChannel = size;
-        }
+        public DiscordBot Bot = _bot;
 
         /// <summary>Represents a single cached message.</summary>
         public struct CachedMessage
@@ -148,7 +141,7 @@ public void PrefillInternal(int amountToFill)
                     try
                     {
                         SingleChannelCache cache = GetCacheForChannel(channel.Id);
-                        List<IMessage> messages = new();
+                        List<IMessage> messages = [];
                         channel.GetMessagesAsync(amountToFill).ForEachAwaitAsync(async col =>
                         {
                             messages.AddRange(col);

MicroWebHelper.cs

@@ -27,10 +27,10 @@ public class MicroWebHelper
         public CancellationTokenSource CancelToken = new();
 
         /// <summary>Token indicates that the whole system is done.</summary>
-        public CancellationTokenSource IsEnded = new ();
+        public CancellationTokenSource IsEnded = new();
 
         /// <summary>Pre-scanned list of valid paths for the raw file root.</summary>
-        public HashSet<string> RawRootStartPaths = new();
+        public HashSet<string> RawRootStartPaths = [];
 
         /// <summary>Function to get dynamic pages as-needed.</summary>
         public Func<string, HttpListenerContext, WebResult> PageGetter;
@@ -130,7 +130,7 @@ public void Apply(HttpListenerResponse response)
         }
 
         /// <summary>Cache of raw root files.</summary>
-        public Dictionary<string, WebResult> RawFileCache = new();
+        public Dictionary<string, WebResult> RawFileCache = [];
 
         /// <summary>Creates and immediately starts the web helper.</summary>
         public MicroWebHelper(string bind, Func<string, HttpListenerContext, WebResult> _pageGetter, string _rawFileRoot = "wwwroot/")

Reactables/ReactableMessage.cs

@@ -25,7 +25,7 @@ public class ReactableMessage
         /// <summary>Removes the actual reactions from the message.</summary>
         public void RemoveReactions()
         {
-            Message.RemoveReactionsAsync(DiscordBotBaseHelper.CurrentBot.Client.CurrentUser, new IEmote[] { new Emoji(Constants.ACCEPT_EMOJI), new Emoji(Constants.DENY_EMOJI) }).Wait();
+            Message.RemoveReactionsAsync(DiscordBotBaseHelper.CurrentBot.Client.CurrentUser, [new Emoji(Constants.ACCEPT_EMOJI), new Emoji(Constants.DENY_EMOJI)]).Wait();
         }
     }
 }

mcmonkeyDiscordBotBase.csproj

@@ -4,7 +4,7 @@
     <OutputType>Library</OutputType>
     <RootNamespace>DiscordBotBase</RootNamespace>
     <AssemblyName>mcmonkeyDiscordBotBase</AssemblyName>
-    <TargetFramework>net6.0</TargetFramework>
+    <TargetFramework>net8.0</TargetFramework>
     <LangVersion>Latest</LangVersion>
     <Product>mcmonkeyDiscordBotBase</Product>
     <PackageId>mcmonkeyDiscordBotBase</PackageId>
@@ -14,8 +14,8 @@
     <EmbeddedResource Include="**\*.resx" />
   </ItemGroup>
   <ItemGroup>
-    <PackageReference Include="FreneticLLC.FreneticUtilities" Version="1.0.14" />
-    <PackageReference Include="Discord.Net" Version="3.12.0" />
-    <PackageReference Include="Discord.Net.WebSocket" Version="3.12.0" />
+    <PackageReference Include="FreneticLLC.FreneticUtilities" Version="1.0.24" />
+    <PackageReference Include="Discord.Net" Version="3.13.0" />
+    <PackageReference Include="Discord.Net.WebSocket" Version="3.13.0" />
   </ItemGroup>
 </Project>