Improve migration Script

Geekbot.net/Database/DatabaseContext.cs

@@ -14,6 +14,8 @@ namespace Geekbot.net.Database
         public DbSet<RollsModel> Rolls { get; set; }
         public DbSet<MessagesModel> Messages { get; set; }
         public DbSet<SlapsModel> Slaps { get; set; }
+        public DbSet<GlobalsModel> Globals { get; set; }
+        
         // public DbSet<UserSettingsModel> UserSettings { get; set; }
         // public DbSet<RoleSelfServiceModel> RoleSelfService { get; set; }
     }

Geekbot.net/Database/Models/GlobalsModel.cs

@@ -0,0 +1,18 @@
+using System.ComponentModel.DataAnnotations;
+
+namespace Geekbot.net.Database.Models
+{
+    public class GlobalsModel
+    {
+        [Key]
+        public int Id { get; set; }
+        
+        [Required]
+        public string Name { get; set; }
+        
+        [Required]
+        public string Value { get; set; }
+        
+        public string Meta { get; set; }
+    }
+}

Geekbot.net/Database/RedisMigration.cs

@@ -8,6 +8,7 @@ using Geekbot.net.Commands.Utils.Quote;
 using Geekbot.net.Database.Models;
 using Geekbot.net.Lib.Extensions;
 using Geekbot.net.Lib.Logger;
+using MtgApiManager.Lib.Model;
 using Newtonsoft.Json;
 using StackExchange.Redis;
 
@@ -172,8 +173,6 @@ namespace Geekbot.net.Database
                     {
                         try
                         {
-                            // drop the guild qounter
-                            if(q.Name.ToString() != "0") continue;
                             var user = new MessagesModel()
                             {
                                 GuildId = guild.Id.AsLong(),
@@ -242,7 +241,9 @@ namespace Geekbot.net.Database
                     {
                         try
                         {
-                            _database.Users.Add(new UserModel()
+                            var namesSerialized = _redis.HashGet($"User:{user.Id}", "UsedNames").ToString();
+                            var names = Utf8Json.JsonSerializer.Deserialize<string[]>(namesSerialized);
+                            _database.Users.AddIfNotExists(new UserModel()
                             {
                                 UserId = user.Id.AsLong(),
                                 Username = user.Username,
@@ -250,8 +251,8 @@ namespace Geekbot.net.Database
                                 AvatarUrl = user.GetAvatarUrl(ImageFormat.Auto, 1024),
                                 IsBot = user.IsBot,
                                 Joined = user.CreatedAt,
-                                    UsedNames = new [] {user.Username}
+                                UsedNames = names
-                                });
+                            }, model => model.UserId.Equals(user.Id.AsLong()));
                             _database.SaveChanges();
                         }
                         catch

Geekbot.net/Lib/Extensions/DbSetExtensions.cs

@@ -0,0 +1,17 @@
+using System;
+using System.Linq;
+using System.Linq.Expressions;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.ChangeTracking;
+
+namespace Geekbot.net.Lib.Extensions
+{
+    public static class DbSetExtensions
+    {
+        public static EntityEntry<T> AddIfNotExists<T>(this DbSet<T> dbSet, T entity, Expression<Func<T, bool>> predicate = null) where T : class, new()
+        {
+            var exists = predicate != null ? dbSet.Any(predicate) : dbSet.Any();
+            return !exists ? dbSet.Add(entity) : null;
+        }
+    }
+}