- Database namespace is now NadekoBot.Db

- Db related code is now in src/NadekoBot/Db
- Finished major part of the db refactor, but many optimizations are left to be made

src/NadekoBot/Db/Extensions/WarningExtensions.cs

@@ -0,0 +1,56 @@
+using NadekoBot.Core.Services.Database.Models;
+using Microsoft.EntityFrameworkCore;
+using System.Linq;
+using System.Threading.Tasks;
+using System;
+
+namespace NadekoBot.Db
+{
+    public static class WarningExtensions
+    {
+        public static Warning[] ForId(this DbSet<Warning> warnings, ulong guildId, ulong userId)
+        {
+            var query = warnings.AsQueryable()
+                .Where(x => x.GuildId == guildId && x.UserId == userId)
+                .OrderByDescending(x => x.DateAdded);
+
+            return query.ToArray();
+        }
+
+        public static bool Forgive(this DbSet<Warning> warnings, ulong guildId, ulong userId, string mod, int index)
+        {
+            if (index < 0)
+                throw new ArgumentOutOfRangeException(nameof(index));
+
+            var warn = warnings.AsQueryable().Where(x => x.GuildId == guildId && x.UserId == userId)
+                .OrderByDescending(x => x.DateAdded)
+                .Skip(index)
+                .FirstOrDefault();
+
+            if (warn == null || warn.Forgiven)
+                return false;
+
+            warn.Forgiven = true;
+            warn.ForgivenBy = mod;
+            return true;
+        }
+
+        public static async Task ForgiveAll(this DbSet<Warning> warnings, ulong guildId, ulong userId, string mod)
+        {
+            await warnings.AsQueryable().Where(x => x.GuildId == guildId && x.UserId == userId)
+                .ForEachAsync(x =>
+                {
+                    if (x.Forgiven != true)
+                    {
+                        x.Forgiven = true;
+                        x.ForgivenBy = mod;
+                    }
+                });
+        }
+
+        public static Warning[] GetForGuild(this DbSet<Warning> warnings, ulong id)
+        {
+            return warnings.AsQueryable().Where(x => x.GuildId == id).ToArray();
+        }
+    }
+}