Adding username history to user repo

Geekbot.net/Commands/Role.cs

@@ -107,7 +107,7 @@ namespace Geekbot.net.Commands
                     await ReplyAsync("Woah, i don't think you want to add that role to self service as it contains some dangerous permissions");
                     return;
                 }
-                _redis.HashSet($"{Context.Guild.Id}:RoleWhitelist", new HashEntry[] { new HashEntry(roleName, role.Id.ToString()) });
+                _redis.HashSet($"{Context.Guild.Id}:RoleWhitelist", new HashEntry[] { new HashEntry(roleName.ToLower(), role.Id.ToString()) });
                 await ReplyAsync($"Added {role.Name} to the whitelist");
             }
             catch (Exception e)

Geekbot.net/Lib/UserRepository.cs

@@ -1,9 +1,12 @@
 using System;
+using System.Collections.Generic;
+using System.Globalization;
+using System.Linq;
 using System.Threading.Tasks;
-using AngleSharp.Dom.Css;
 using Discord.WebSocket;
 using Serilog;
 using StackExchange.Redis;
+using Utf8Json;
 
 namespace Geekbot.net.Lib
 {
@@ -20,27 +23,48 @@ namespace Geekbot.net.Lib
         public Task<bool> Update(SocketUser user)
         {
             try
+            {
+                var savedUser = Get(user.Id);
+                savedUser.Id = user.Id;
+                savedUser.Username = user.Username;
+                savedUser.Discriminator = user.Discriminator;
+                savedUser.AvatarUrl = user.GetAvatarUrl() ?? "0";
+                savedUser.IsBot = user.IsBot;
+                savedUser.Joined = user.CreatedAt;
+                if(savedUser.UsedNames == null) savedUser.UsedNames = new List<string>();
+                if (!savedUser.UsedNames.Contains(user.Username))
+                {
+                    savedUser.UsedNames.Add(user.Username);
+                }
+                Store(savedUser);
+                
+                _logger.Information($"[UserRepository] Updated User {user.Username}#{user.Discriminator} ({user.Id})");
+                return Task.FromResult(true);
+            }
+            catch (Exception e)
+            {
+                _logger.Warning(e, $"[UserRepository] Failed to update {user.Username}#{user.Discriminator} ({user.Id})");
+                return Task.FromResult(false);
+            }
+        }
+
+        private void Store(UserRepositoryUser user)
         {
             _redis.HashSetAsync($"Users:{user.Id.ToString()}", new HashEntry[]
             {
                 new HashEntry("Id", user.Id.ToString()),
                 new HashEntry("Username", user.Username),
                 new HashEntry("Discriminator", user.Discriminator),
-                    new HashEntry("AvatarUrl", user.GetAvatarUrl() ?? "0"),
+                new HashEntry("AvatarUrl", user.AvatarUrl),
                 new HashEntry("IsBot", user.IsBot), 
-                    new HashEntry("Joined", user.CreatedAt.ToString()), 
+                new HashEntry("Joined", user.Joined.ToString()), 
+                new HashEntry("UsedNames", JsonSerializer.Serialize(user.UsedNames)), 
             });
-                _logger.Information($"[UserRepository] Updated User {user.Id}");
-                return Task.FromResult(true);
-            }
-            catch (Exception e)
-            {
-                _logger.Warning(e, $"[UserRepository] Failed to update {user.Id}");
-                return Task.FromResult(false);
-            }
         }
 
         public UserRepositoryUser Get(ulong userId)
+        {
+            try
             {
                 var user = _redis.HashGetAll($"Users:{userId.ToString()}");
                 for (int i = 1; i < 11; i++)
@@ -70,12 +94,21 @@ namespace Geekbot.net.Lib
                             dto.IsBot = a.Value == 1;
                             break;
                         case "Joined":
-                        dto.Joined = DateTimeOffset.Parse(a.Value);
+                            dto.Joined = DateTimeOffset.Parse(a.Value.ToString());
+                            break;
+                        case "UsedNames":
+                            dto.UsedNames = JsonSerializer.Deserialize<List<string>>(a.Value.ToString()) ?? new List<string>();
                             break;
                     }
                 }
                 return dto;
             }
+            catch (Exception e)
+            {
+                _logger.Warning(e, $"[UserRepository] Failed to get {userId} from repository");
+                return new UserRepositoryUser();
+            }
+        }
 
         public string getUserSetting(ulong userId, string setting)
         {
@@ -100,6 +133,7 @@ namespace Geekbot.net.Lib
         public string AvatarUrl { get; set; }
         public bool IsBot { get; set; }
         public DateTimeOffset Joined { get; set; }
+        public List<string> UsedNames { get; set; }
     }
 
     public interface IUserRepository