Initial system for new joke handling

DeukBot4/MessageHandlers/JokeHandling/DadJoke.cs

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+using System.Text.RegularExpressions;
+using System.Threading.Tasks;
+using Discord;
+using Discord.WebSocket;
+
+namespace DeukBot4.MessageHandlers.JokeHandling
+{
+    internal class DadJoke : IJokeController
+    {
+        public string Id => "dad";
+        public string Name => "Hi I'm dad";
+
+        private Regex _regex = new Regex(@".*i['| a]*m ([\w\s]{3,15})$",
+            RegexOptions.IgnoreCase | RegexOptions.CultureInvariant);
+
+        public async Task Run(SocketMessage message)
+        {
+            if (!(message.Author is IGuildUser guildUser))
+                return;
+            var    content = message.Content;
+            var match = _regex.Match(content);
+            if (match.Success)
+            {
+                var newName = match.Groups[1].Value;
+                await message.Channel.SendMessageAsync($"Hi {newName}, i'm Deukbot");
+                await guildUser.ModifyAsync(user => user.Nickname = newName);
+            }
+        }
+    }
+}

DeukBot4/MessageHandlers/JokeHandling/DeltaJoke.cs

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+using System.Linq;
+using System.Threading.Tasks;
+using DeukBot4.APIHandlers;
+using DeukBot4.Utilities;
+using Discord.WebSocket;
+
+namespace DeukBot4.MessageHandlers.JokeHandling
+{
+    internal class DeltaJoke : IJokeController
+    {
+        public string Id => "delta";
+        public string Name => "No deltas, it's called Origin";
+        public async Task Run(SocketMessage message)
+        {
+            var lowerCasedContent = message.Content.ToLowerInvariant().RemoveSpecialCharacters();
+            if (lowerCasedContent.Contains("origin"))
+                return;
+
+            var lowerSplit = lowerCasedContent.Split(' ');
+            if (lowerSplit.Select(s => Lehvenstein.LevenshteinDistance(s, "delta")).Any(diff => diff <= 1))
+            {
+                var warning = "uhh excuse me it's called\n Origin and it's an art";
+                await message.Channel.SendFileAsync(await CatPicHandler.GetCatPicture(warning), "cat_pic.png");
+            }
+        }
+    }
+}

DeukBot4/MessageHandlers/JokeHandling/IJokeController.cs

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+using System.Threading.Tasks;
+using Discord.WebSocket;
+
+namespace DeukBot4.MessageHandlers.JokeHandling
+{
+    public interface IJokeController
+    {
+        string Id { get; }
+        string Name { get; }
+
+        Task Run(SocketMessage message);
+    }
+}

DeukBot4/MessageHandlers/JokeHandling/JokeHandler.cs

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+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Threading.Tasks;
+using Discord.WebSocket;
+
+namespace DeukBot4.MessageHandlers.JokeHandling
+{
+    public static class JokeHandler
+    {
+        public static readonly Dictionary<string, IJokeController> Jokes = new Dictionary<string, IJokeController>();
+
+        public static void Initialize()
+        {
+            var jokes = typeof(JokeHandler).Assembly.GetTypes()
+                .Where(x => typeof(IJokeController).IsAssignableFrom(x) && !x.IsInterface);
+            foreach (var joke in jokes)
+            {
+                var c = (IJokeController)Activator.CreateInstance(joke);
+                Jokes.Add(c.Id, c);
+            }
+        }
+
+        public static async Task RunJokes(SocketMessage message)
+        {
+            foreach (var jokeController in Jokes)
+            {
+                jokeController.Value.Run(message);
+            }
+        }
+    }
+}

DeukBot4/MessageHandlers/JokeHandling/ThanksJoke.cs

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+using System.Text.RegularExpressions;
+using System.Threading.Tasks;
+using Discord.WebSocket;
+
+namespace DeukBot4.MessageHandlers.JokeHandling
+{
+    internal class ThanksJoke : IJokeController
+    {
+        public string Id => "thanks";
+        public string Name => "Claim credit when people say thanks";
+
+        private readonly Regex ThanksMatcher = new Regex(@"(?i)((\b)thanks*(\W|$)+)");
+        private readonly string[] ThanksResponses = {
+            "You're welcome!", "No problem",
+            "It was the least I could do, I always do the least I can do!",
+            "Yes, well, we'd be absolutely nowhere without me.",
+            "Yeah no problem, I'm the only one who does work around here anyway",
+            "I gotchu, bb."
+        };
+        private static int _pos = 0;
+
+        public async Task Run(SocketMessage message)
+        {
+            var content = message.Content;
+            if (ThanksMatcher.IsMatch(content))
+            {
+                var response = ThanksResponses[_pos];
+                _pos = (_pos + 1) % ThanksResponses.Length;
+                message.Channel.SendMessageAsync(response);
+            }
+        }
+    }
+}