feat: New bot rules

Author: ProgrammingByPermutation

src/Nullinside.Api.TwitchBot.Tests/ChatRules/BestCheapViewersTests.cs

@@ -15,6 +15,8 @@ public class BestCheapViewersTests : AChatRuleUnitTestBase<BestCheapViewers> {
   /// </summary>
   /// <param name="badString">The string that should fail.</param>
   [Test]
+  [TestCase("B\u0366est vie\u031fwers on streamboo .com ( remove the space )  @IBjZQcD1")]
+  [TestCase("Cheap \u0314Viewers on  streamboo .com ( remove the space )  @kX9lOgg1")]
   [TestCase("B͐est vi̯ewers o͎n on streamboo .com ( remove the space )  @9F3Wnft0")]
   [TestCase("Ch̚eͅap viewers on ***  @STGPMoLg")]
   [TestCase("C̭heap viewe͌rs on̆ ***  @R1QXrXPM")]

src/Nullinside.Api.TwitchBot.Tests/ChatRules/BotsisterTests.cs

@@ -0,0 +1,28 @@
+using Moq;
+
+using Nullinside.Api.Common.Twitch;
+using Nullinside.Api.TwitchBot.ChatRules;
+using Nullinside.Api.TwitchBot.Model;
+
+namespace Nullinside.Api.TwitchBot.Tests.ChatRules;
+
+/// <summary>
+///   Tests the <see cref="Botsister" /> class.
+/// </summary>
+public class BotsisterTests : AChatRuleUnitTestBase<Botsister> {
+  /// <summary>
+  ///   Tests the strings typed in chats.
+  /// </summary>
+  /// <param name="badString">The string that should fail.</param>
+  [Test]
+  [TestCase("Your chat’s so empty, it’s giving ‘no signal’ vibes. Fix it with botsister .com  @uFi5gGov")]
+  public async Task TestKnownStrings(string badString) {
+    var rule = new Botsister();
+    var botProxy = new Mock<ITwitchApiProxy>();
+    var chat = new TwitchChatMessage(true, badString, "123", "456");
+
+    // Process the message and assert that we fail the message.
+    bool result = await rule.Handle("123", botProxy.Object, chat, _db);
+    Assert.That(result, Is.False);
+  }
+}

src/Nullinside.Api.TwitchBot.Tests/ChatRules/DiscordTests.cs

@@ -15,6 +15,7 @@ public class DiscordTests : AChatRuleUnitTestBase<Discord> {
   /// </summary>
   /// <param name="badString">The string that should fail.</param>
   [Test]
+  [TestCase("Yo bruh \u2764\ufe0f let's sometimes play together and share tips add up on discord \ud83d\udc49 willam0340")]
   [TestCase("Hello mate you stream pretty cool that's why I follow I would love to be a fan of yours if you don't mind kindly add me on Discord: 👉👉lacaster5")]
   [TestCase("Hello, I just recently found your channel and can already tell that your content is great, and I would love to stick with you long term. If you're open to it, I'd be willing to connect with you on Discord. My username is teecash1000")]
   [TestCase("Hey there 👋 You stream pretty cool that’s why I followed you. I will like to make you a friend and be a fan, if you don’t mind Kindly chat me on Discord, my Discord username is tuckzay")]

src/Nullinside.Api.TwitchBot/ChatRules/Botsister.cs

@@ -0,0 +1,36 @@
+using Nullinside.Api.Common.Twitch;
+using Nullinside.Api.Model;
+using Nullinside.Api.TwitchBot.Model;
+
+using TwitchLib.Client.Models;
+
+using TwitchUserConfig = Nullinside.Api.Model.Ddl.TwitchUserConfig;
+
+namespace Nullinside.Api.TwitchBot.ChatRules;
+
+/// <summary>
+///   Handles "botsister" spam.
+/// </summary>
+public class Botsister : AChatRule {
+  /// <inheritdoc />
+  public override bool ShouldRun(TwitchUserConfig config) {
+    return config is { Enabled: true, BanKnownBots: true };
+  }
+
+  /// <inheritdoc />
+  public override async Task<bool> Handle(string channelId, ITwitchApiProxy botProxy, TwitchChatMessage message,
+    INullinsideContext db, CancellationToken stoppingToken = new()) {
+    // The number of spaces per message may chance, so normalize that and lowercase it for comparison.
+    string normalized = string.Concat(message.Message.Split(" ").Where(s => !string.IsNullOrWhiteSpace(s)))
+      .ToLowerInvariant();
+
+    // Message will start with any of these variations.
+    if (message.IsFirstMessage && normalized.Contains("botsister")) {
+      await BanAndLog(channelId, botProxy, new[] { (message.UserId, message.Username) },
+        "[Bot] Spam (Botsister)", db, stoppingToken);
+      return false;
+    }
+
+    return true;
+  }
+}

src/Nullinside.Api.TwitchBot/ChatRules/Discord.cs

@@ -18,7 +18,8 @@ public class Discord : AChatRule {
     "chat with me",
     "my discord username",
     "my username",
-    "connect on discord"
+    "connect on discord",
+    "add up"
   ];
 
   /// <inheritdoc />