$claim, $waifuinfo, $affinity and $divorce commands added for a waifu currency game

src/NadekoBot/Migrations/20170122044958_waifus.cs

@@ -0,0 +1,140 @@
+using System;
+using System.Collections.Generic;
+using Microsoft.EntityFrameworkCore.Migrations;
+
+namespace NadekoBot.Migrations
+{
+    public partial class waifus : Migration
+    {
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.CreateTable(
+                name: "DiscordUser",
+                columns: table => new
+                {
+                    Id = table.Column<int>(nullable: false)
+                        .Annotation("Sqlite:Autoincrement", true),
+                    AvatarId = table.Column<string>(nullable: true),
+                    Discriminator = table.Column<string>(nullable: true),
+                    UserId = table.Column<ulong>(nullable: false),
+                    Username = table.Column<string>(nullable: true)
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_DiscordUser", x => x.Id);
+                    table.UniqueConstraint("AK_DiscordUser_UserId", x => x.UserId);
+                });
+
+            migrationBuilder.CreateTable(
+                name: "WaifuInfo",
+                columns: table => new
+                {
+                    Id = table.Column<int>(nullable: false)
+                        .Annotation("Sqlite:Autoincrement", true),
+                    AffinityId = table.Column<int>(nullable: true),
+                    ClaimerId = table.Column<int>(nullable: true),
+                    Price = table.Column<int>(nullable: false),
+                    WaifuId = table.Column<int>(nullable: false)
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_WaifuInfo", x => x.Id);
+                    table.ForeignKey(
+                        name: "FK_WaifuInfo_DiscordUser_AffinityId",
+                        column: x => x.AffinityId,
+                        principalTable: "DiscordUser",
+                        principalColumn: "Id",
+                        onDelete: ReferentialAction.Restrict);
+                    table.ForeignKey(
+                        name: "FK_WaifuInfo_DiscordUser_ClaimerId",
+                        column: x => x.ClaimerId,
+                        principalTable: "DiscordUser",
+                        principalColumn: "Id",
+                        onDelete: ReferentialAction.Restrict);
+                    table.ForeignKey(
+                        name: "FK_WaifuInfo_DiscordUser_WaifuId",
+                        column: x => x.WaifuId,
+                        principalTable: "DiscordUser",
+                        principalColumn: "Id",
+                        onDelete: ReferentialAction.Cascade);
+                });
+
+            migrationBuilder.CreateTable(
+                name: "WaifuUpdates",
+                columns: table => new
+                {
+                    Id = table.Column<int>(nullable: false)
+                        .Annotation("Sqlite:Autoincrement", true),
+                    NewId = table.Column<int>(nullable: true),
+                    OldId = table.Column<int>(nullable: true),
+                    UpdateType = table.Column<int>(nullable: false),
+                    UserId = table.Column<int>(nullable: false)
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_WaifuUpdates", x => x.Id);
+                    table.ForeignKey(
+                        name: "FK_WaifuUpdates_DiscordUser_NewId",
+                        column: x => x.NewId,
+                        principalTable: "DiscordUser",
+                        principalColumn: "Id",
+                        onDelete: ReferentialAction.Restrict);
+                    table.ForeignKey(
+                        name: "FK_WaifuUpdates_DiscordUser_OldId",
+                        column: x => x.OldId,
+                        principalTable: "DiscordUser",
+                        principalColumn: "Id",
+                        onDelete: ReferentialAction.Restrict);
+                    table.ForeignKey(
+                        name: "FK_WaifuUpdates_DiscordUser_UserId",
+                        column: x => x.UserId,
+                        principalTable: "DiscordUser",
+                        principalColumn: "Id",
+                        onDelete: ReferentialAction.Cascade);
+                });
+
+            migrationBuilder.CreateIndex(
+                name: "IX_WaifuInfo_AffinityId",
+                table: "WaifuInfo",
+                column: "AffinityId");
+
+            migrationBuilder.CreateIndex(
+                name: "IX_WaifuInfo_ClaimerId",
+                table: "WaifuInfo",
+                column: "ClaimerId");
+
+            migrationBuilder.CreateIndex(
+                name: "IX_WaifuInfo_WaifuId",
+                table: "WaifuInfo",
+                column: "WaifuId",
+                unique: true);
+
+            migrationBuilder.CreateIndex(
+                name: "IX_WaifuUpdates_NewId",
+                table: "WaifuUpdates",
+                column: "NewId");
+
+            migrationBuilder.CreateIndex(
+                name: "IX_WaifuUpdates_OldId",
+                table: "WaifuUpdates",
+                column: "OldId");
+
+            migrationBuilder.CreateIndex(
+                name: "IX_WaifuUpdates_UserId",
+                table: "WaifuUpdates",
+                column: "UserId");
+        }
+
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropTable(
+                name: "WaifuInfo");
+
+            migrationBuilder.DropTable(
+                name: "WaifuUpdates");
+
+            migrationBuilder.DropTable(
+                name: "DiscordUser");
+        }
+    }
+}

src/NadekoBot/Migrations/NadekoSqliteContextModelSnapshot.cs

@@ -299,6 +299,26 @@ namespace NadekoBot.Migrations
                     b.ToTable("CustomReactions");
                 });
 
+            modelBuilder.Entity("NadekoBot.Services.Database.Models.DiscordUser", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd();
+
+                    b.Property<string>("AvatarId");
+
+                    b.Property<string>("Discriminator");
+
+                    b.Property<ulong>("UserId");
+
+                    b.Property<string>("Username");
+
+                    b.HasKey("Id");
+
+                    b.HasAlternateKey("UserId");
+
+                    b.ToTable("DiscordUser");
+                });
+
             modelBuilder.Entity("NadekoBot.Services.Database.Models.Donator", b =>
                 {
                     b.Property<int>("Id")
@@ -817,6 +837,55 @@ namespace NadekoBot.Migrations
                     b.ToTable("PokeGame");
                 });
 
+            modelBuilder.Entity("NadekoBot.Services.Database.Models.WaifuInfo", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd();
+
+                    b.Property<int?>("AffinityId");
+
+                    b.Property<int?>("ClaimerId");
+
+                    b.Property<int>("Price");
+
+                    b.Property<int>("WaifuId");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("AffinityId");
+
+                    b.HasIndex("ClaimerId");
+
+                    b.HasIndex("WaifuId")
+                        .IsUnique();
+
+                    b.ToTable("WaifuInfo");
+                });
+
+            modelBuilder.Entity("NadekoBot.Services.Database.Models.WaifuUpdate", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd();
+
+                    b.Property<int?>("NewId");
+
+                    b.Property<int?>("OldId");
+
+                    b.Property<int>("UpdateType");
+
+                    b.Property<int>("UserId");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("NewId");
+
+                    b.HasIndex("OldId");
+
+                    b.HasIndex("UserId");
+
+                    b.ToTable("WaifuUpdates");
+                });
+
             modelBuilder.Entity("NadekoBot.Services.Database.Models.AntiRaidSetting", b =>
                 {
                     b.HasOne("NadekoBot.Services.Database.Models.GuildConfig", "GuildConfig")
@@ -982,6 +1051,38 @@ namespace NadekoBot.Migrations
                         .WithMany("RaceAnimals")
                         .HasForeignKey("BotConfigId");
                 });
+
+            modelBuilder.Entity("NadekoBot.Services.Database.Models.WaifuInfo", b =>
+                {
+                    b.HasOne("NadekoBot.Services.Database.Models.DiscordUser", "Affinity")
+                        .WithMany()
+                        .HasForeignKey("AffinityId");
+
+                    b.HasOne("NadekoBot.Services.Database.Models.DiscordUser", "Claimer")
+                        .WithMany()
+                        .HasForeignKey("ClaimerId");
+
+                    b.HasOne("NadekoBot.Services.Database.Models.DiscordUser", "Waifu")
+                        .WithOne()
+                        .HasForeignKey("NadekoBot.Services.Database.Models.WaifuInfo", "WaifuId")
+                        .OnDelete(DeleteBehavior.Cascade);
+                });
+
+            modelBuilder.Entity("NadekoBot.Services.Database.Models.WaifuUpdate", b =>
+                {
+                    b.HasOne("NadekoBot.Services.Database.Models.DiscordUser", "New")
+                        .WithMany()
+                        .HasForeignKey("NewId");
+
+                    b.HasOne("NadekoBot.Services.Database.Models.DiscordUser", "Old")
+                        .WithMany()
+                        .HasForeignKey("OldId");
+
+                    b.HasOne("NadekoBot.Services.Database.Models.DiscordUser", "User")
+                        .WithMany()
+                        .HasForeignKey("UserId")
+                        .OnDelete(DeleteBehavior.Cascade);
+                });
         }
     }
 }

src/NadekoBot/Modules/Gambling/Commands/WaifuClaimCommands.cs

@@ -0,0 +1,516 @@
+using Discord;
+using Discord.Commands;
+using NadekoBot.Attributes;
+using NadekoBot.Extensions;
+using NadekoBot.Services;
+using NadekoBot.Services.Database;
+using NadekoBot.Services.Database.Models;
+using System;
+using System.Collections.Concurrent;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace NadekoBot.Modules.Gambling
+{
+    public partial class Gambling
+    {
+        public enum ClaimTitles
+        {
+            Lonely,
+            Devoted,
+            Rookie,
+            Schemer,
+            Dilettante,
+            Intermediate,
+            Seducer,
+            Expert,
+            Veteran,
+            Incubis,
+            Harem_King,
+            Harem_God,
+        }
+
+        public enum AffinityTitles
+        {
+            Pure,
+            Faithful,
+            Defiled,
+            Cheater,
+            Tainted,
+            Corrupted,
+            Lewd,
+            Sloot,
+            Depraved,
+            Harlot
+        }
+
+        [Group]
+        public class WaifuClaimCommands : ModuleBase
+        {
+            private static ConcurrentDictionary<ulong, DateTime> _divorceCooldowns { get; } = new ConcurrentDictionary<ulong, DateTime>();
+            private static ConcurrentDictionary<ulong, DateTime> _affinityCooldowns { get; } = new ConcurrentDictionary<ulong, DateTime>();
+
+            enum WaifuClaimResult
+            {
+                Success,
+                NotEnoughFunds,
+                InsufficientAmount
+            }
+
+            [NadekoCommand, Usage, Description, Aliases]
+            [RequireContext(ContextType.Guild)]
+            public async Task WaifuClaim(int amount, [Remainder]IUser target)
+            {
+                if (amount < 50)
+                {
+                    await Context.Channel.SendErrorAsync($"{Context.User.Mention} No waifu is that cheap. You must pay at least 50{NadekoBot.BotConfig.CurrencySign} to get a waifu, even if their actual value is lower.").ConfigureAwait(false);
+                    return;
+                }
+
+                if (target.Id == Context.User.Id)
+                {
+                    await Context.Channel.SendErrorAsync(Context.User.Mention + " You can't claim yourself.").ConfigureAwait(false);
+                    return;
+                }
+
+                WaifuClaimResult result = WaifuClaimResult.NotEnoughFunds;
+                int? oldPrice = null;
+                WaifuInfo w;
+                var isAffinity = false;
+                using (var uow = DbHandler.UnitOfWork())
+                {
+                    w = uow.Waifus.ByWaifuUserId(target.Id);
+                    isAffinity = (w?.Affinity?.UserId == Context.User.Id);
+                    if (w == null)
+                    {
+                        var claimer = uow.DiscordUsers.GetOrCreate(Context.User);
+                        var waifu = uow.DiscordUsers.GetOrCreate(target);
+                        if (!await CurrencyHandler.RemoveCurrencyAsync(Context.User.Id, "Claimed Waifu", amount, uow).ConfigureAwait(false))
+                        {
+                            result = WaifuClaimResult.NotEnoughFunds;
+                        }
+                        else
+                        {
+                            uow.Waifus.Add(w = new WaifuInfo()
+                            {
+                                Waifu = waifu,
+                                Claimer = claimer,
+                                Affinity = null,
+                                Price = amount
+                            });
+                            uow._context.WaifuUpdates.Add(new WaifuUpdate()
+                            {
+                                User = waifu,
+                                Old = null,
+                                New = claimer,
+                                UpdateType = WaifuUpdateType.Claimed
+                            });
+                            result = WaifuClaimResult.Success;
+                        }
+                    }
+                    else if (isAffinity && amount >= w.Price * 0.88f)
+                    {
+                        if (!await CurrencyHandler.RemoveCurrencyAsync(Context.User.Id, "Claimed Waifu", amount, uow).ConfigureAwait(false))
+                        {
+                            result = WaifuClaimResult.NotEnoughFunds;
+                        }
+                        else
+                        {
+                            var oldClaimer = w.Claimer;
+                            w.Claimer = uow.DiscordUsers.GetOrCreate(Context.User);
+                            oldPrice = w.Price;
+                            w.Price = amount + (amount / 4);
+                            result = WaifuClaimResult.Success;
+
+                            uow._context.WaifuUpdates.Add(new WaifuUpdate()
+                            {
+                                User = w.Waifu,
+                                Old = oldClaimer,
+                                New = w.Claimer,
+                                UpdateType = WaifuUpdateType.Claimed
+                            });
+                        }
+                    }
+                    else if (amount >= w.Price * 1.1f) // if no affinity
+                    {
+                        if (!await CurrencyHandler.RemoveCurrencyAsync(Context.User.Id, "Claimed Waifu", amount, uow).ConfigureAwait(false))
+                        {
+                            result = WaifuClaimResult.NotEnoughFunds;
+                        }
+                        else
+                        {
+                            var oldClaimer = w.Claimer;
+                            w.Claimer = uow.DiscordUsers.GetOrCreate(Context.User);
+                            oldPrice = w.Price;
+                            w.Price = amount;
+                            result = WaifuClaimResult.Success;
+
+                            uow._context.WaifuUpdates.Add(new WaifuUpdate()
+                            {
+                                User = w.Waifu,
+                                Old = oldClaimer,
+                                New = w.Claimer,
+                                UpdateType = WaifuUpdateType.Claimed
+                            });
+                        }
+                    }
+                    else
+                        result = WaifuClaimResult.InsufficientAmount;
+
+
+                    await uow.CompleteAsync().ConfigureAwait(false);
+                }
+
+                if (result == WaifuClaimResult.InsufficientAmount)
+                {
+                    await Context.Channel.SendErrorAsync($"{Context.User.Mention} You must pay {Math.Ceiling(w.Price * (isAffinity ? 0.88f : 1.1f))} or more to claim that waifu!").ConfigureAwait(false);
+                    return;
+                }
+                else if (result == WaifuClaimResult.NotEnoughFunds)
+                {
+                    await Context.Channel.SendConfirmAsync($"{Context.User.Mention} you don't have {amount}{NadekoBot.BotConfig.CurrencySign}!")
+                            .ConfigureAwait(false);
+                }
+                else
+                {
+                    var msg = $"{Context.User.Mention} claimed {target.Mention} as their waifu for {amount}{NadekoBot.BotConfig.CurrencySign}!";
+                    if (w.Affinity?.UserId == Context.User.Id)
+                        msg += $"\n🎉 Their love is fulfilled! 🎉\n**{target}'s** new value is {w.Price}{NadekoBot.BotConfig.CurrencySign}!";
+                    await Context.Channel.SendConfirmAsync(msg)
+                            .ConfigureAwait(false);
+                }
+            }
+
+            public enum DivorceResult
+            {
+                Success,
+                SucessWithPenalty,
+                NotYourWife,
+                Cooldown
+            }
+
+
+            private static readonly TimeSpan DivorceLimit = TimeSpan.FromHours(6);
+            [NadekoCommand, Usage, Description, Aliases]
+            [RequireContext(ContextType.Guild)]
+            public async Task Divorce([Remainder]IUser target)
+            {
+                var channel = (ITextChannel)Context.Channel;
+
+                if (target.Id == Context.User.Id)
+                    return;
+
+                var result = DivorceResult.NotYourWife;
+                TimeSpan difference = TimeSpan.Zero;
+                var amount = 0;
+                WaifuInfo w = null;
+                using (var uow = DbHandler.UnitOfWork())
+                {
+                    w = uow.Waifus.ByWaifuUserId(target.Id);
+                    var now = DateTime.UtcNow;
+                    if (w == null || w.Claimer == null || w.Claimer.UserId != Context.User.Id)
+                        result = DivorceResult.NotYourWife;
+                    else if (_divorceCooldowns.AddOrUpdate(Context.User.Id,
+                        now,
+                        (key, old) => ((difference = now.Subtract(old)) > DivorceLimit) ? now : old) != now)
+                    {
+                        result = DivorceResult.Cooldown;
+                    }
+                    else
+                    {
+                        amount = w.Price / 2;
+
+                        if (w.Affinity?.UserId == Context.User.Id)
+                        {
+                            await CurrencyHandler.AddCurrencyAsync(w.Waifu.UserId, "Waifu Compensation", amount, uow).ConfigureAwait(false);
+                            w.Price = (int)Math.Floor(w.Price * 0.75f);
+                            result = DivorceResult.SucessWithPenalty;
+                        }
+                        else
+                        {
+                            await CurrencyHandler.AddCurrencyAsync(Context.User.Id, "Waifu Refund", amount, uow).ConfigureAwait(false);
+
+                            result = DivorceResult.Success;
+                        }
+                        var oldClaimer = w.Claimer;
+                        w.Claimer = null;
+
+                        uow._context.WaifuUpdates.Add(new WaifuUpdate()
+                        {
+                            User = w.Waifu,
+                            Old = oldClaimer,
+                            New = null,
+                            UpdateType = WaifuUpdateType.Claimed
+                        });
+                    }
+
+                    await uow.CompleteAsync().ConfigureAwait(false);
+                }
+
+                if (result == DivorceResult.SucessWithPenalty)
+                {
+                    await Context.Channel.SendConfirmAsync($"{Context.User.Mention} You have divorced a waifu who likes you. You heartless monster.\n{w.Waifu} received {amount}{NadekoBot.BotConfig.CurrencySign} as a compensation.").ConfigureAwait(false);
+                }
+                else if (result == DivorceResult.Success)
+                {
+                    await Context.Channel.SendConfirmAsync($"{Context.User.Mention} You have divorced a waifu who doesn't like you. You received {amount}{NadekoBot.BotConfig.CurrencySign} back.").ConfigureAwait(false);
+                }
+                else if (result == DivorceResult.NotYourWife)
+                {
+                    await Context.Channel.SendErrorAsync($"{Context.User.Mention} That waifu is not yours.").ConfigureAwait(false);
+                }
+                else
+                {
+                    var remaining = DivorceLimit.Subtract(difference);
+                    await Context.Channel.SendErrorAsync($"{Context.User.Mention} You divorced recently. You must wait **{remaining.Hours} hours and {remaining.Minutes} minutes** to divorce again.").ConfigureAwait(false);
+                }
+            }
+
+            private static readonly TimeSpan AffinityLimit = TimeSpan.FromMinutes(30);
+            [NadekoCommand, Usage, Description, Aliases]
+            [RequireContext(ContextType.Guild)]
+            public async Task WaifuClaimerAffinity([Remainder]IUser u = null)
+            {
+                if (u?.Id == Context.User.Id)
+                {
+                    await Context.Channel.SendErrorAsync($"{Context.User.Mention} you can't set affinity to yourself, you egomaniac.").ConfigureAwait(false);
+                    return;
+                }
+                DiscordUser oldAff = null;
+                var sucess = false;
+                var cooldown = false;
+                TimeSpan difference = TimeSpan.Zero;
+                using (var uow = DbHandler.UnitOfWork())
+                {
+                    var w = uow.Waifus.ByWaifuUserId(Context.User.Id);
+                    var newAff = u == null ? null : uow.DiscordUsers.GetOrCreate(u);
+                    var now = DateTime.UtcNow;
+                    if (w?.Affinity?.UserId == u?.Id)
+                    {
+                        sucess = false;
+                    }
+                    else if (_affinityCooldowns.AddOrUpdate(Context.User.Id,
+                        now,
+                        (key, old) => ((difference = now.Subtract(old)) > AffinityLimit) ? now : old) != now)
+                    {
+                        sucess = false;
+                        cooldown = true;
+                    }
+                    else if (w == null)
+                    {
+                        var thisUser = uow.DiscordUsers.GetOrCreate(Context.User);
+                        uow.Waifus.Add(new WaifuInfo()
+                        {
+                            Affinity = newAff,
+                            Waifu = thisUser,
+                            Price = 1,
+                            Claimer = null
+                        });
+                        sucess = true;
+
+                        uow._context.WaifuUpdates.Add(new WaifuUpdate()
+                        {
+                            User = thisUser,
+                            Old = null,
+                            New = newAff,
+                            UpdateType = WaifuUpdateType.AffinityChanged
+                        });
+                    }
+                    else
+                    {
+                        if (w.Affinity != null)
+                            oldAff = w.Affinity;
+                        w.Affinity = newAff;
+                        sucess = true;
+
+                        uow._context.WaifuUpdates.Add(new WaifuUpdate()
+                        {
+                            User = w.Waifu,
+                            Old = oldAff,
+                            New = newAff,
+                            UpdateType = WaifuUpdateType.AffinityChanged
+                        });
+                    }
+
+                    await uow.CompleteAsync().ConfigureAwait(false);
+                }
+                if (!sucess)
+                {
+                    if (cooldown)
+                    {
+                        var remaining = AffinityLimit.Subtract(difference);
+                        await Context.Channel.SendErrorAsync($"{Context.User.Mention} You must wait **{remaining.Hours} hours and {remaining.Minutes} minutes** in order to change your affinity again.").ConfigureAwait(false);
+                    }
+                    else
+                        await Context.Channel.SendErrorAsync($"{Context.User.Mention} your affinity is already set to that waifu or you're trying to remove your affinity while not having one.").ConfigureAwait(false);
+                    return;
+                }
+                if (u == null)
+                    await Context.Channel.SendConfirmAsync("Affinity Reset", $"{Context.User.Mention} Your affinity is reset. You no longer have a person you like.").ConfigureAwait(false);
+                else if (oldAff == null)
+                    await Context.Channel.SendConfirmAsync("Affinity Set", $"{Context.User.Mention} wants to be {u.Mention}'s waifu. Aww <3").ConfigureAwait(false);
+                else
+                    await Context.Channel.SendConfirmAsync("Affinity Changed", $"{Context.User.Mention} changed their affinity from {oldAff} to {u.Mention}.\n\n*This is morally questionable.*🤔").ConfigureAwait(false);
+            }
+
+            [NadekoCommand, Usage, Description, Aliases]
+            [RequireContext(ContextType.Guild)]
+            public async Task WaifuLeaderboard()
+            {
+                IList<WaifuInfo> waifus;
+                using (var uow = DbHandler.UnitOfWork())
+                {
+                    waifus = uow.Waifus.GetTop(9);
+                }
+
+                if (waifus.Count == 0)
+                {
+                    await Context.Channel.SendConfirmAsync("No waifus have been claimed yet.").ConfigureAwait(false);
+                    return;
+                }
+
+                var embed = new EmbedBuilder()
+                    .WithTitle("Top Waifus")
+                    .WithOkColor();
+
+                for (int i = 0; i < waifus.Count; i++)
+                {
+                    var w = waifus[i];
+
+                    embed.AddField(efb => efb.WithName("#" + (i + 1) + " - " + w.Price + NadekoBot.BotConfig.CurrencySign).WithValue(w.ToString()).WithIsInline(false));
+                }
+
+                await Context.Channel.EmbedAsync(embed).ConfigureAwait(false);
+            }
+
+            [NadekoCommand, Usage, Description, Aliases]
+            [RequireContext(ContextType.Guild)]
+            public async Task WaifuInfo([Remainder]IUser target = null)
+            {
+                if (target == null)
+                    target = Context.User;
+                WaifuInfo w;
+                IList<WaifuInfo> claims;
+                int divorces = 0;
+                using (var uow = DbHandler.UnitOfWork())
+                {
+                    w = uow.Waifus.ByWaifuUserId(target.Id);
+                    claims = uow.Waifus.ByClaimerUserId(target.Id);
+                    divorces = uow._context.WaifuUpdates.Count(x => x.Old != null &&
+                        x.Old.UserId == target.Id &&
+                        x.UpdateType == WaifuUpdateType.Claimed &&
+                        x.New == null);
+                    if (w == null)
+                        uow.Waifus.Add(w = new WaifuInfo()
+                        {
+                            Affinity = null,
+                            Claimer = null,
+                            Price = 1,
+                            Waifu = uow.DiscordUsers.GetOrCreate(target),
+                        });
+                    await uow.CompleteAsync().ConfigureAwait(false);
+                }
+
+                var claimInfo = GetClaimTitle(target.Id);
+                var affInfo = GetAffinityTitle(target.Id);
+
+                var embed = new EmbedBuilder()
+                    .WithOkColor()
+                    .WithTitle("Waifu " + w.Waifu.ToString() + " - \"the " + claimInfo.Title + "\"")
+                    .AddField(efb => efb.WithName("Price").WithValue(w.Price.ToString()).WithIsInline(true))
+                    .AddField(efb => efb.WithName("Claimed by").WithValue(w.Claimer?.ToString() ?? "No one").WithIsInline(true))
+                    .AddField(efb => efb.WithName("Likes").WithValue(w.Affinity?.ToString() ?? "Nobody").WithIsInline(true))
+                    .AddField(efb => efb.WithName("Changes Of Heart").WithValue($"{affInfo.Count} - \"the {affInfo.Title}\"").WithIsInline(true))
+                    .AddField(efb => efb.WithName("Divorces").WithValue(divorces.ToString()).WithIsInline(true))
+                    .AddField(efb => efb.WithName($"Waifus ({claims.Count})").WithValue(claims.Count == 0 ? "Nobody" : string.Join("\n", claims.Select(x => x.Waifu))).WithIsInline(true));
+
+                await Context.Channel.EmbedAsync(embed).ConfigureAwait(false);
+            }
+
+
+            public struct WaifuProfileTitle
+            {
+                public int Count { get; }
+                public string Title { get; }
+
+                public WaifuProfileTitle(int count, string title)
+                {
+                    Count = count;
+                    Title = title;
+                }
+            }
+
+            private static WaifuProfileTitle GetClaimTitle(ulong userId)
+            {
+                int count = 0;
+                using (var uow = DbHandler.UnitOfWork())
+                {
+                    count = uow.Waifus.ByClaimerUserId(userId).Count;
+                }
+
+                ClaimTitles title = ClaimTitles.Lonely;
+                if (count == 0)
+                    title = ClaimTitles.Lonely;
+                else if (count == 1)
+                    title = ClaimTitles.Devoted;
+                else if (count < 4)
+                    title = ClaimTitles.Rookie;
+                else if (count < 6)
+                    title = ClaimTitles.Schemer;
+                else if (count < 8)
+                    title = ClaimTitles.Dilettante;
+                else if (count < 10)
+                    title = ClaimTitles.Intermediate;
+                else if (count < 12)
+                    title = ClaimTitles.Seducer;
+                else if (count < 15)
+                    title = ClaimTitles.Expert;
+                else if (count < 17)
+                    title = ClaimTitles.Veteran;
+                else if (count < 25)
+                    title = ClaimTitles.Incubis;
+                else if (count < 50)
+                    title = ClaimTitles.Harem_King;
+                else
+                    title = ClaimTitles.Harem_God;
+
+                return new WaifuProfileTitle(count, title.ToString().Replace('_', ' '));
+            }
+
+            private static WaifuProfileTitle GetAffinityTitle(ulong userId)
+            {
+                int count = 0;
+                using (var uow = DbHandler.UnitOfWork())
+                {
+                    count = uow._context.WaifuUpdates.Count(w => w.User.UserId == userId && w.UpdateType == WaifuUpdateType.AffinityChanged);
+                }
+
+                AffinityTitles title = AffinityTitles.Pure;
+                if (count < 1)
+                    title = AffinityTitles.Pure;
+                else if (count < 2)
+                    title = AffinityTitles.Faithful;
+                else if (count < 4)
+                    title = AffinityTitles.Defiled;
+                else if (count < 7)
+                    title = AffinityTitles.Cheater;
+                else if (count < 9)
+                    title = AffinityTitles.Tainted;
+                else if (count < 11)
+                    title = AffinityTitles.Corrupted;
+                else if (count < 13)
+                    title = AffinityTitles.Lewd;
+                else if (count < 15)
+                    title = AffinityTitles.Sloot;
+                else if (count < 17)
+                    title = AffinityTitles.Depraved;
+                else if (count < 20)
+                    title = AffinityTitles.Harlot;
+
+                return new WaifuProfileTitle(count, title.ToString().Replace('_', ' '));
+            }
+        }
+    }
+}

src/NadekoBot/Modules/Gambling/Gambling.cs

@@ -147,7 +147,7 @@ namespace NadekoBot.Modules.Gambling
 
         [NadekoCommand, Usage, Description, Aliases]
         [OwnerOnly]
-        public async Task BrTest(int tests = 1000)
+        public Task BrTest(int tests = 1000)
         {
             var t = Task.Run(async () =>
             {
@@ -189,10 +189,15 @@ namespace NadekoBot.Modules.Gambling
                     sb.AppendLine($"x{key} occured {dict[key]} times. {dict[key] * 1.0f / tests * 100}%");
                     payout += key * dict[key];
                 }
+                try
+                {
                     await Context.Channel.SendConfirmAsync("BetRoll Test Results", sb.ToString(),
                         footer: $"Total Bet: {tests * bet} | Payout: {payout * bet} | {payout * 1.0f / tests * 100}%");
+                }
+                catch { }
 
             });
+            return Task.CompletedTask;
         }
 
         [NadekoCommand, Usage, Description, Aliases]

src/NadekoBot/Modules/Utility/Commands/QuoteCommands.cs

@@ -48,7 +48,7 @@ namespace NadekoBot.Modules.Utility
                 keyword = keyword.ToUpperInvariant();
 
                 Quote quote;
-                using (var uow = DbHandler.Instance.GetUnitOfWork())
+                using (var uow = DbHandler.UnitOfWork())
                 {
                     quote = await uow.Quotes.GetRandomQuoteByKeywordAsync(Context.Guild.Id, keyword).ConfigureAwait(false);
                 }

src/NadekoBot/Resources/CommandStrings.Designer.cs

@@ -2489,6 +2489,33 @@ namespace NadekoBot.Resources {
             }
         }
         
+        /// <summary>
+        ///    Looks up a localized string similar to divorce.
+        /// </summary>
+        public static string divorce_cmd {
+            get {
+                return ResourceManager.GetString("divorce_cmd", resourceCulture);
+            }
+        }
+        
+        /// <summary>
+        ///    Looks up a localized string similar to Releases your claim on a specific waifu. You will get a part of your money back unless that waifu has an affinity towards you..
+        /// </summary>
+        public static string divorce_desc {
+            get {
+                return ResourceManager.GetString("divorce_desc", resourceCulture);
+            }
+        }
+        
+        /// <summary>
+        ///    Looks up a localized string similar to `{0}divorce @CheatingSloot`.
+        /// </summary>
+        public static string divorce_usage {
+            get {
+                return ResourceManager.GetString("divorce_usage", resourceCulture);
+            }
+        }
+        
         /// <summary>
         ///    Looks up a localized string similar to donadd.
         /// </summary>
@@ -8375,6 +8402,114 @@ namespace NadekoBot.Resources {
             }
         }
         
+        /// <summary>
+        ///    Looks up a localized string similar to claimwaifu claim.
+        /// </summary>
+        public static string waifuclaim_cmd {
+            get {
+                return ResourceManager.GetString("waifuclaim_cmd", resourceCulture);
+            }
+        }
+        
+        /// <summary>
+        ///    Looks up a localized string similar to Claim a waifu for yourself by spending currency.  You must spend atleast 10% more than her current value unless she set `{0}affinity` towards you..
+        /// </summary>
+        public static string waifuclaim_desc {
+            get {
+                return ResourceManager.GetString("waifuclaim_desc", resourceCulture);
+            }
+        }
+        
+        /// <summary>
+        ///    Looks up a localized string similar to `{0}claim 50 @Himesama`.
+        /// </summary>
+        public static string waifuclaim_usage {
+            get {
+                return ResourceManager.GetString("waifuclaim_usage", resourceCulture);
+            }
+        }
+        
+        /// <summary>
+        ///    Looks up a localized string similar to affinity.
+        /// </summary>
+        public static string waifuclaimeraffinity_cmd {
+            get {
+                return ResourceManager.GetString("waifuclaimeraffinity_cmd", resourceCulture);
+            }
+        }
+        
+        /// <summary>
+        ///    Looks up a localized string similar to Sets your affinity towards someone you want to be claimed by. Setting affinity will reduce their `{0}claim` on you by 20%.
+        /// </summary>
+        public static string waifuclaimeraffinity_desc {
+            get {
+                return ResourceManager.GetString("waifuclaimeraffinity_desc", resourceCulture);
+            }
+        }
+        
+        /// <summary>
+        ///    Looks up a localized string similar to `{0}affinity`.
+        /// </summary>
+        public static string waifuclaimeraffinity_usage {
+            get {
+                return ResourceManager.GetString("waifuclaimeraffinity_usage", resourceCulture);
+            }
+        }
+        
+        /// <summary>
+        ///    Looks up a localized string similar to waifuinfo waifustats.
+        /// </summary>
+        public static string waifuinfo_cmd {
+            get {
+                return ResourceManager.GetString("waifuinfo_cmd", resourceCulture);
+            }
+        }
+        
+        /// <summary>
+        ///    Looks up a localized string similar to Shows waifu stats for a target person..
+        /// </summary>
+        public static string waifuinfo_desc {
+            get {
+                return ResourceManager.GetString("waifuinfo_desc", resourceCulture);
+            }
+        }
+        
+        /// <summary>
+        ///    Looks up a localized string similar to `{0}waifuinfo @MyCrush`.
+        /// </summary>
+        public static string waifuinfo_usage {
+            get {
+                return ResourceManager.GetString("waifuinfo_usage", resourceCulture);
+            }
+        }
+        
+        /// <summary>
+        ///    Looks up a localized string similar to waifus waifulb.
+        /// </summary>
+        public static string waifuleaderboard_cmd {
+            get {
+                return ResourceManager.GetString("waifuleaderboard_cmd", resourceCulture);
+            }
+        }
+        
+        /// <summary>
+        ///    Looks up a localized string similar to Shows top 10 waifus..
+        /// </summary>
+        public static string waifuleaderboard_desc {
+            get {
+                return ResourceManager.GetString("waifuleaderboard_desc", resourceCulture);
+            }
+        }
+        
+        /// <summary>
+        ///    Looks up a localized string similar to `{0}waifus`.
+        /// </summary>
+        public static string waifuleaderboard_usage {
+            get {
+                return ResourceManager.GetString("waifuleaderboard_usage", resourceCulture);
+            }
+        }
+        
         /// <summary>
         ///    Looks up a localized string similar to weather we.
         /// </summary>

src/NadekoBot/Resources/CommandStrings.resx

@@ -2979,4 +2979,49 @@
   <data name="slot_usage" xml:space="preserve">
     <value>`{0}slot 5`</value>
   </data>
+  <data name="waifuclaimeraffinity_cmd" xml:space="preserve">
+    <value>affinity</value>
+  </data>
+  <data name="waifuclaimeraffinity_desc" xml:space="preserve">
+    <value>Sets your affinity towards someone you want to be claimed by. Setting affinity will reduce their `{0}claim` on you by 20%</value>
+  </data>
+  <data name="waifuclaimeraffinity_usage" xml:space="preserve">
+    <value>`{0}affinity`</value>
+  </data>
+  <data name="waifuclaim_cmd" xml:space="preserve">
+    <value>claimwaifu claim</value>
+  </data>
+  <data name="waifuclaim_desc" xml:space="preserve">
+    <value>Claim a waifu for yourself by spending currency.  You must spend atleast 10% more than her current value unless she set `{0}affinity` towards you.</value>
+  </data>
+  <data name="waifuclaim_usage" xml:space="preserve">
+    <value>`{0}claim 50 @Himesama`</value>
+  </data>
+  <data name="waifuleaderboard_cmd" xml:space="preserve">
+    <value>waifus waifulb</value>
+  </data>
+  <data name="waifuleaderboard_desc" xml:space="preserve">
+    <value>Shows top 10 waifus.</value>
+  </data>
+  <data name="waifuleaderboard_usage" xml:space="preserve">
+    <value>`{0}waifus`</value>
+  </data>
+  <data name="divorce_cmd" xml:space="preserve">
+    <value>divorce</value>
+  </data>
+  <data name="divorce_desc" xml:space="preserve">
+    <value>Releases your claim on a specific waifu. You will get a part of your money back unless that waifu has an affinity towards you.</value>
+  </data>
+  <data name="divorce_usage" xml:space="preserve">
+    <value>`{0}divorce @CheatingSloot`</value>
+  </data>
+  <data name="waifuinfo_cmd" xml:space="preserve">
+    <value>waifuinfo waifustats</value>
+  </data>
+  <data name="waifuinfo_desc" xml:space="preserve">
+    <value>Shows waifu stats for a target person.</value>
+  </data>
+  <data name="waifuinfo_usage" xml:space="preserve">
+    <value>`{0}waifuinfo @MyCrush`</value>
+  </data>
 </root>

src/NadekoBot/Services/CommandHandler.cs

@@ -197,8 +197,10 @@ namespace NadekoBot.Services
                 if (usrMsg == null) //has to be an user message, not system/other messages.
                     return;
 
+#if !GLOBAL_NADEKO
                 // track how many messagges each user is sending
                 UserMessagesSent.AddOrUpdate(usrMsg.Author.Id, 1, (key, old) => ++old);
+#endif
 
                 var channel = msg.Channel as SocketTextChannel;
                 var guild = channel?.Guild;

src/NadekoBot/Services/CurrencyHandler.cs

@@ -4,6 +4,7 @@ using Discord;
 using NadekoBot.Extensions;
 using NadekoBot.Modules.Gambling;
 using NadekoBot.Services.Database.Models;
+using NadekoBot.Services.Database;
 
 namespace NadekoBot.Services
 {
@@ -19,13 +20,26 @@ namespace NadekoBot.Services
             return success;
         }
 
-        public static async Task<bool> RemoveCurrencyAsync(ulong authorId, string reason, long amount)
+        public static async Task<bool> RemoveCurrencyAsync(ulong authorId, string reason, long amount, IUnitOfWork uow = null)
         {
             if (amount < 0)
                 throw new ArgumentNullException(nameof(amount));
 
 
-            using (var uow = DbHandler.UnitOfWork())
+            if (uow == null)
+            {
+                using (uow = DbHandler.UnitOfWork())
+                {
+                    var toReturn = InternalRemoveCurrency(authorId, reason, amount, uow);
+                    await uow.CompleteAsync().ConfigureAwait(false);
+                    return toReturn;
+                }
+            }
+
+            return InternalRemoveCurrency(authorId, reason, amount, uow);
+        }
+
+        private static bool InternalRemoveCurrency(ulong authorId, string reason, long amount, IUnitOfWork uow)
         {
             var success = uow.Currency.TryUpdateState(authorId, -amount);
             if (!success)
@@ -36,9 +50,6 @@ namespace NadekoBot.Services
                 Reason = reason,
                 Amount = -amount,
             });
-                await uow.CompleteAsync().ConfigureAwait(false);
-            }
-
             return true;
         }
 
@@ -50,23 +61,30 @@ namespace NadekoBot.Services
                 try { await author.SendConfirmAsync($"`You received:` {amount} {NadekoBot.BotConfig.CurrencySign}\n`Reason:` {reason}").ConfigureAwait(false); } catch { }
         }
 
-        public static async Task AddCurrencyAsync(ulong receiverId, string reason, long amount)
+        public static async Task AddCurrencyAsync(ulong receiverId, string reason, long amount, IUnitOfWork uow = null)
         {
             if (amount < 0)
                 throw new ArgumentNullException(nameof(amount));
 
-
-            using (var uow = DbHandler.UnitOfWork())
-            {
-                uow.Currency.TryUpdateState(receiverId, amount);
-                uow.CurrencyTransactions.Add(new CurrencyTransaction()
+            var transaction = new CurrencyTransaction()
             {
                 UserId = receiverId,
                 Reason = reason,
                 Amount = amount,
-                });
+            };
+
+            if (uow == null)
+                using (uow = DbHandler.UnitOfWork())
+                {
+                    uow.Currency.TryUpdateState(receiverId, amount);
+                    uow.CurrencyTransactions.Add(transaction);
                     await uow.CompleteAsync();
                 }
+            else
+            {
+                uow.Currency.TryUpdateState(receiverId, amount);
+                uow.CurrencyTransactions.Add(transaction);
+            }
         }
     }
 }

src/NadekoBot/Services/Database/IUnitOfWork.cs

@@ -21,6 +21,8 @@ namespace NadekoBot.Services.Database
         ICurrencyTransactionsRepository CurrencyTransactions { get; }
         IMusicPlaylistRepository MusicPlaylists { get; }
         IPokeGameRepository PokeGame { get; }
+        IWaifuRepository Waifus { get; }
+        IDiscordUserRepository DiscordUsers { get; }
 
         int Complete();
         Task<int> CompleteAsync();

src/NadekoBot/Services/Database/Models/DiscordUser.cs

@@ -0,0 +1,19 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace NadekoBot.Services.Database.Models
+{
+    public class DiscordUser : DbEntity
+    {
+        public ulong UserId { get; set; }
+        public string Username { get; set; }
+        public string Discriminator { get; set; }
+        public string AvatarId { get; set; }
+
+        public override string ToString() => 
+            Username + "#" + Discriminator;
+    }
+}

src/NadekoBot/Services/Database/Models/Waifu.cs

@@ -0,0 +1,49 @@
+using NadekoBot.Extensions;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace NadekoBot.Services.Database.Models
+{
+    public class WaifuInfo : DbEntity
+    {
+        public int WaifuId { get; set; }
+        public DiscordUser Waifu { get; set; }
+
+        public int? ClaimerId { get; set; }
+        public DiscordUser Claimer { get; set; }
+
+        public int? AffinityId { get; set; }
+        public DiscordUser Affinity { get; set; }
+
+        public int Price { get; set; }
+
+        public override string ToString()
+        {
+            var claimer = "no one";
+            var status = "";
+
+            var waifuUsername = Waifu.Username.TrimTo(20);
+            var claimerUsername = Claimer?.Username.TrimTo(20);
+
+            if (Claimer != null)
+            {
+                claimer = $"{ claimerUsername }#{Claimer.Discriminator}";
+            }
+            if (AffinityId == null)
+            {
+                status = $"... but {waifuUsername}'s heart is empty";
+            }
+            else if (AffinityId == ClaimerId)
+            {
+                status = $"... and {waifuUsername} likes {claimerUsername} too <3";
+            }
+            else {
+                status = $"... but {waifuUsername}'s heart belongs to {Affinity.Username.TrimTo(20)}#{Affinity.Discriminator}";
+            }
+            return $"**{waifuUsername}#{Waifu.Discriminator}** - claimed by **{claimer}**\n\t{status}";
+        }
+    }
+}

src/NadekoBot/Services/Database/Models/WaifuUpdate.cs

@@ -0,0 +1,27 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace NadekoBot.Services.Database.Models
+{
+    public class WaifuUpdate : DbEntity
+    {
+        public int UserId { get; set; }
+        public DiscordUser User { get; set; }
+        public WaifuUpdateType UpdateType { get; set; }
+
+        public int? OldId { get; set; }
+        public DiscordUser Old { get; set; }
+
+        public int? NewId { get; set; }
+        public DiscordUser New { get; set; }
+    }
+
+    public enum WaifuUpdateType
+    {
+        AffinityChanged,
+        Claimed
+    }
+}

src/NadekoBot/Services/Database/NadekoContext.cs

@@ -3,9 +3,26 @@ using System.Collections.Generic;
 using System.Linq;
 using NadekoBot.Services.Database.Models;
 using NadekoBot.Extensions;
+using Microsoft.EntityFrameworkCore.Infrastructure;
 
 namespace NadekoBot.Services.Database
 {
+
+    public class NadekoContextFactory : IDbContextFactory<NadekoContext>
+    {
+        /// <summary>
+        /// :\ Used for migrations
+        /// </summary>
+        /// <param name="options"></param>
+        /// <returns></returns>
+        public NadekoContext Create(DbContextFactoryOptions options)
+        {
+            var optionsBuilder = new DbContextOptionsBuilder();
+            optionsBuilder.UseSqlite("Filename=./data/NadekoBot.db");
+            return new NadekoContext(optionsBuilder.Options);
+        }
+    }
+
     public class NadekoContext : DbContext
     {
         public DbSet<Quote> Quotes { get; set; }
@@ -22,6 +39,7 @@ namespace NadekoBot.Services.Database
         public DbSet<CustomReaction> CustomReactions { get; set; }
         public DbSet<CurrencyTransaction> CurrencyTransactions { get; set; }
         public DbSet<UserPokeTypes> PokeGame { get; set; }
+        public DbSet<WaifuUpdate> WaifuUpdates { get; set; }
 
         //logging
         public DbSet<LogSetting> LogSettings { get; set; }
@@ -33,23 +51,15 @@ namespace NadekoBot.Services.Database
         public DbSet<RaceAnimal> RaceAnimals { get; set; }
         public DbSet<ModulePrefix> ModulePrefixes { get; set; }
 
-        public NadekoContext()
+        public NadekoContext() : base()
         {
-            this.Database.Migrate();
+
         }
 
         public NadekoContext(DbContextOptions options) : base(options)
         {
-            this.Database.Migrate();
-            EnsureSeedData();
         }
 
-        ////Uncomment this to db initialisation with dotnet ef migration add [module]
-        //protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)
-        //{
-        //    optionsBuilder.UseSqlite("Filename=./data/NadekoBot.db");
-        //}
-
         public void EnsureSeedData()
         {
             if (!BotConfig.Any())
@@ -244,6 +254,24 @@ namespace NadekoBot.Services.Database
             //    .HasIndex(cp => cp.CommandName)
             //    .IsUnique();
             #endregion
+
+            #region Waifus
+
+            var wi = modelBuilder.Entity<WaifuInfo>();
+            wi.HasOne(x => x.Waifu)
+                .WithOne();
+            //    //.HasForeignKey<WaifuInfo>(w => w.WaifuId)
+            //    //.IsRequired(true);
+
+            //wi.HasOne(x => x.Claimer)
+            //    .WithOne();
+            //    //.HasForeignKey<WaifuInfo>(w => w.ClaimerId)
+            //    //.IsRequired(false);
+
+            var du = modelBuilder.Entity<DiscordUser>();
+            du.HasAlternateKey(w => w.UserId);
+
+            #endregion
         }
     }
 }

src/NadekoBot/Services/Database/Repositories/IDiscordUserRepository.cs

@@ -0,0 +1,15 @@
+using Discord;
+using NadekoBot.Services.Database.Models;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace NadekoBot.Services.Database.Repositories
+{
+    public interface IDiscordUserRepository : IRepository<DiscordUser>
+    {
+        DiscordUser GetOrCreate(IUser original);
+    }
+}

src/NadekoBot/Services/Database/Repositories/IWaifuRepository.cs

@@ -0,0 +1,13 @@
+using NadekoBot.Services.Database.Models;
+using System;
+using System.Collections.Generic;
+
+namespace NadekoBot.Services.Database.Repositories
+{
+    public interface IWaifuRepository : IRepository<WaifuInfo>
+    {
+        IList<WaifuInfo> GetTop(int count);
+        WaifuInfo ByWaifuUserId(ulong userId);
+        IList<WaifuInfo> ByClaimerUserId(ulong userId);
+    }
+}

src/NadekoBot/Services/Database/Repositories/Impl/DiscordUserRepository.cs

@@ -0,0 +1,36 @@
+using NadekoBot.Services.Database.Models;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using Microsoft.EntityFrameworkCore;
+using Discord;
+
+namespace NadekoBot.Services.Database.Repositories.Impl
+{
+    public class DiscordUserRepository : Repository<DiscordUser>, IDiscordUserRepository
+    {
+        public DiscordUserRepository(DbContext context) : base(context)
+        {
+        }
+
+        public DiscordUser GetOrCreate(IUser original)
+        {
+            DiscordUser toReturn;
+
+            toReturn = _set.FirstOrDefault(u => u.UserId == original.Id);
+
+            if (toReturn == null)
+                _set.Add(toReturn = new DiscordUser()
+                {
+                    AvatarId = original.AvatarId,
+                    Discriminator = original.Discriminator,
+                    UserId = original.Id,
+                    Username = original.Username,
+                });
+
+            return toReturn;
+        }
+    }
+}

src/NadekoBot/Services/Database/Repositories/Impl/WaifuRepository.cs

@@ -0,0 +1,49 @@
+using NadekoBot.Services.Database.Models;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using Microsoft.EntityFrameworkCore;
+
+namespace NadekoBot.Services.Database.Repositories.Impl
+{
+    public class WaifuRepository : Repository<WaifuInfo>, IWaifuRepository
+    {
+        public WaifuRepository(DbContext context) : base(context)
+        {
+        }
+
+        public WaifuInfo ByWaifuUserId(ulong userId)
+        {
+            return _set.Include(wi => wi.Waifu)
+                        .Include(wi => wi.Affinity)
+                        .Include(wi => wi.Claimer)
+                        .FirstOrDefault(wi => wi.Waifu.UserId == userId);
+        }
+
+        public IList<WaifuInfo> ByClaimerUserId(ulong userId)
+        {
+            return _set.Include(wi => wi.Waifu)
+                        .Include(wi => wi.Affinity)
+                        .Include(wi => wi.Claimer)
+                        .Where(wi => wi.Claimer != null && wi.Claimer.UserId == userId)
+                        .ToList();
+        }
+
+        public IList<WaifuInfo> GetTop(int count)
+        {
+            if (count < 0)
+                throw new ArgumentOutOfRangeException(nameof(count));
+            if (count == 0)
+                return new List<WaifuInfo>();
+
+            return _set.Include(wi => wi.Waifu)
+                        .Include(wi => wi.Affinity)
+                        .Include(wi => wi.Claimer)
+                    .OrderByDescending(wi => wi.Price)
+                    .Take(count)
+                    .ToList();
+        }
+    }
+}

src/NadekoBot/Services/Database/UnitOfWork.cs

@@ -48,6 +48,12 @@ namespace NadekoBot.Services.Database
         private IPokeGameRepository _pokegame;
         public IPokeGameRepository PokeGame => _pokegame ?? (_pokegame = new PokeGameRepository(_context));
 
+        private IWaifuRepository _waifus;
+        public IWaifuRepository Waifus => _waifus ?? (_waifus = new WaifuRepository(_context));
+
+        private IDiscordUserRepository _discordUsers;
+        public IDiscordUserRepository DiscordUsers => _discordUsers ?? (_discordUsers = new DiscordUserRepository(_context));
+
         public UnitOfWork(NadekoContext context)
         {
             _context = context;

src/NadekoBot/Services/DbHandler.cs

@@ -1,4 +1,6 @@
-using Microsoft.EntityFrameworkCore;
+using System;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Infrastructure;
 using NadekoBot.Services.Database;
 
 namespace NadekoBot.Services
@@ -13,7 +15,8 @@ namespace NadekoBot.Services
 
         static DbHandler() { }
 
-        private DbHandler() {
+        private DbHandler()
+        {
             connectionString = NadekoBot.Credentials.Db.ConnectionString;
             var optionsBuilder = new DbContextOptionsBuilder();
             optionsBuilder.UseSqlite(NadekoBot.Credentials.Db.ConnectionString);
@@ -32,10 +35,16 @@ namespace NadekoBot.Services
             //}
         }
 
-        public NadekoContext GetDbContext() =>
-            new NadekoContext(options);
+        public NadekoContext GetDbContext()
+        {
+            var context = new NadekoContext(options);
+            context.Database.Migrate();
+            context.EnsureSeedData();
 
-        public IUnitOfWork GetUnitOfWork() =>
+            return context;
+        }
+
+        private IUnitOfWork GetUnitOfWork() =>
             new UnitOfWork(GetDbContext());
 
         public static IUnitOfWork UnitOfWork() =>