Killed history

NadekoBot.Core/Common/Attributes/CommandNameLoadHelper.cs

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+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Linq;
+
+namespace NadekoBot.Common.Attributes
+{
+    public static class CommandNameLoadHelper
+    {
+        
+        private static YamlDotNet.Serialization.IDeserializer _deserializer
+            = new YamlDotNet.Serialization.Deserializer();
+        
+        public static Lazy<Dictionary<string, string[]>> LazyCommandAliases
+            = new Lazy<Dictionary<string, string[]>>(() => LoadCommandNames()); 
+        public static Dictionary<string, string[]> LoadCommandNames(string aliasesFilePath = "data/aliases.yml")
+        {
+            var text = File.ReadAllText(aliasesFilePath);
+            return _deserializer.Deserialize<Dictionary<string, string[]>>(text);
+        }
+
+        public static string[] GetAliasesFor(string methodName)
+            => LazyCommandAliases.Value.TryGetValue(methodName.ToLowerInvariant(), out var aliases) && aliases.Length > 1
+                ? aliases.Skip(1).ToArray()
+                : Array.Empty<string>();
+
+        public static string GetCommandNameFor(string methodName)
+        {
+            methodName = methodName.ToLowerInvariant();
+            var toReturn = LazyCommandAliases.Value.TryGetValue(methodName, out var aliases) && aliases.Length > 0
+                ? aliases[0]
+                : methodName;
+            return toReturn;
+        }
+    }
+}