[reputation] KarmaMode now actually changes smth

modules/Reputation/Service/ReputationService.cs

@@ -4,16 +4,19 @@ using Kruzya.TelegramBot.Core.Service;
 using Microsoft.EntityFrameworkCore;
 using Telegram.Bot.Types;
 using West.TelegramBot.Reputation.Data;
+using West.TelegramBot.Reputation.Options;
 
 namespace West.TelegramBot.Reputation.Service;
 
 public class ReputationService : IReputation
 {
     private readonly ReputationContext _reputationContext;
+    private readonly KarmaMode _karmaMode;
 
-    public ReputationService(ReputationContext reputationContext)
+    public ReputationService(ReputationContext reputationContext, KarmaMode karmaMode)
     {
         _reputationContext = reputationContext;
+        _karmaMode = karmaMode;
     }
 
     public async Task<double> GetUserReputationAsync(Chat chat, User user)
@@ -45,14 +48,25 @@ public class ReputationService : IReputation
     public async Task<double> GetReputationDiffAsync(Chat chat, User sender, User receiver)
     {
         var senderRep = await FindUserReputation(chat, sender);
-        
         if (senderRep == null)
         {
             return 1;
         }
-
+        
+        var karmaMode = await _karmaMode.GetValueAsync(chat.Id);
         var senderValue = senderRep.Value;
-        return Math.Round(senderValue == 0 ? 1 : Math.Sqrt(senderValue), 2);
+
+        double diff;
+        if (senderValue == 0 || karmaMode == "linear")
+        {
+            diff = 1;
+        }
+        else
+        {
+            diff = Math.Round(Math.Sqrt(senderValue), 2);
+        }
+        
+        return diff;
     }
 
     public async Task<IEnumerable<IReputationEntity>> GetChatRatingAsync(Chat chat, int limit = 10, int offset = 0)