Refactor AccentManager to be an entity system, makes accents ECS. (#4825)

Content.Server/Speech/EntitySystems/BackwardsAccentSystem.cs

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+using System;
+using Content.Server.Speech.Components;
+using Robust.Shared.GameObjects;
+
+namespace Content.Server.Speech.EntitySystems
+{
+    public class BackwardsAccentSystem : EntitySystem
+    {
+        public override void Initialize()
+        {
+            SubscribeLocalEvent<BackwardsAccentComponent, AccentGetEvent>(OnAccent);
+        }
+
+        public string Accentuate(string message)
+        {
+            var arr = message.ToCharArray();
+            Array.Reverse(arr);
+            return new string(arr);
+        }
+
+        private void OnAccent(EntityUid uid, BackwardsAccentComponent component, AccentGetEvent args)
+        {
+            args.Message = Accentuate(args.Message);
+        }
+    }
+}

Content.Server/Speech/EntitySystems/MouseAccentSystem.cs

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+using System.Collections.Generic;
+using Content.Server.Speech.Components;
+using Robust.Shared.GameObjects;
+using Robust.Shared.IoC;
+using Robust.Shared.Random;
+
+namespace Content.Server.Speech.EntitySystems
+{
+    // TODO: Code in-game languages and make this a language
+    public class MouseAccentSystem : EntitySystem
+    {
+        [Dependency] private readonly IRobustRandom _random = default!;
+
+        private static readonly IReadOnlyList<string> Squeek = new List<string>{ "Squeak!", "Piep!", "Chuu!" };
+
+        public override void Initialize()
+        {
+            SubscribeLocalEvent<MouseAccentComponent, AccentGetEvent>(OnAccent);
+        }
+
+        public string Accentuate(string message)
+        {
+            // TODO: Maybe add more than one squeek when there are more words?
+            return _random.Pick(Squeek);
+        }
+
+        private void OnAccent(EntityUid uid, MouseAccentComponent component, AccentGetEvent args)
+        {
+            args.Message = Accentuate(args.Message);
+        }
+    }
+}

Content.Server/Speech/EntitySystems/OwOAccentSystem.cs

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+using System.Collections.Generic;
+using Content.Server.Speech.Components;
+using Robust.Shared.GameObjects;
+using Robust.Shared.IoC;
+using Robust.Shared.Random;
+
+namespace Content.Server.Speech.EntitySystems
+{
+    public class OwOAccentSystem : EntitySystem
+    {
+        [Dependency] private readonly IRobustRandom _random = default!;
+
+        private static readonly IReadOnlyList<string> Faces = new List<string>{
+            " (・`ω´・)", " ;;w;;", " owo", " UwU", " >w<", " ^w^"
+        }.AsReadOnly();
+
+        private static readonly IReadOnlyDictionary<string, string> SpecialWords = new Dictionary<string, string>()
+        {
+            { "you", "wu" },
+        };
+
+        private string RandomFace => _random.Pick(Faces);
+
+        public override void Initialize()
+        {
+            SubscribeLocalEvent<OwOAccentComponent, AccentGetEvent>(OnAccent);
+        }
+
+        public string Accentuate(string message)
+        {
+            foreach (var (word, repl) in SpecialWords)
+            {
+                message = message.Replace(word, repl);
+            }
+
+            return message.Replace("!", RandomFace)
+                .Replace("r", "w").Replace("R", "W")
+                .Replace("l", "w").Replace("L", "W");
+        }
+
+        private void OnAccent(EntityUid uid, OwOAccentComponent component, AccentGetEvent args)
+        {
+            args.Message = Accentuate(args.Message);
+        }
+    }
+}

Content.Server/Speech/EntitySystems/SpanishAccentSystem.cs

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+using Content.Server.Speech.Components;
+using Robust.Shared.GameObjects;
+
+namespace Content.Server.Speech.EntitySystems
+{
+    public class SpanishAccentSystem : EntitySystem
+    {
+        public override void Initialize()
+        {
+            SubscribeLocalEvent<SpanishAccentComponent, AccentGetEvent>(OnAccent);
+        }
+
+        public string Accentuate(string message)
+        {
+            // Insert E before every S
+            message = InsertS(message);
+            // If a sentence ends with ?, insert a reverse ? at the beginning of the sentence
+            message = ReplaceQuestionMark(message);
+            return message;
+        }
+
+        private string InsertS(string message)
+        {
+            // Replace every new Word that starts with s/S
+            var msg = message.Replace(" s", " es").Replace(" S", " Es");
+
+            // Still need to check if the beginning of the message starts
+            if (msg.StartsWith("s"))
+            {
+                return msg.Remove(0, 1).Insert(0, "es");
+            }
+            else if (msg.StartsWith("S"))
+            {
+                return msg.Remove(0, 1).Insert(0, "Es");
+            }
+
+            return msg;
+        }
+
+        private string ReplaceQuestionMark(string message)
+        {
+            var sentences = AccentSystem.SentenceRegex.Split(message);
+            var msg = "";
+            foreach (var s in sentences)
+            {
+                if (s.EndsWith("?")) // We've got a question => add ¿ to the beginning
+                {
+                    // Because we don't split by whitespace, we may have some spaces in front of the sentence.
+                    // So we add the symbol before the first non space char
+                    msg += s.Insert(s.Length - s.TrimStart().Length, "¿");
+                }
+                else
+                {
+                    msg += s;
+                }
+            }
+            return msg;
+        }
+
+        private void OnAccent(EntityUid uid, SpanishAccentComponent component, AccentGetEvent args)
+        {
+            args.Message = Accentuate(args.Message);
+        }
+    }
+}