[reputation] Move reputation to separate module.

modules/Reputation/Service/ReputationService.cs

@@ -0,0 +1,62 @@
+using Kruzya.TelegramBot.Core.Extensions;
+using Kruzya.TelegramBot.Core.Service;
+using Microsoft.EntityFrameworkCore;
+using Telegram.Bot.Types;
+using West.TelegramBot.Reputation.Data;
+
+namespace West.TelegramBot.Reputation.Service;
+
+public class ReputationService : IReputation
+{
+    private readonly ReputationContext _reputationContext;
+
+    public ReputationService(ReputationContext reputationContext)
+    {
+        _reputationContext = reputationContext;
+    }
+
+    public async Task<double> GetUserReputationAsync(Chat chat, User user)
+    {
+        var rep = await FindUserReputation(chat, user);
+
+        return rep?.Value ?? 0;
+    }
+
+    public async Task<double> SetUserReputationAsync(Chat chat, User user, double value)
+    {
+        var rep = await FindUserReputation(chat, user) ?? new UserReputation
+        {
+            ChatId = chat.Id,
+            UserId = user.Id
+        };
+
+        rep.Value = Math.Round(value, 2);
+        _reputationContext.AddOrUpdate(rep);
+
+        return rep.Value;
+    }
+
+    public async Task IncrementReputationAsync(Chat chat, User user, double diff)
+    {
+        await SetUserReputationAsync(chat, user, await GetUserReputationAsync(chat, user) + diff);
+    }
+
+    public async Task<double> GetReputationDiffAsync(Chat chat, User sender, User receiver)
+    {
+        var senderRep = await FindUserReputation(chat, sender);
+        
+        if (senderRep == null)
+        {
+            return 1;
+        }
+
+        var senderValue = senderRep.Value;
+        return Math.Round(senderValue == 0 ? 1 : Math.Sqrt(senderValue), 2);
+    }
+
+    private async Task<UserReputation?> FindUserReputation(Chat chat, User user)
+    {
+        return await _reputationContext.UserReputation.SingleOrDefaultAsync(
+            e => e.ChatId == chat.Id && e.UserId == user.Id);
+    }
+}