From 30556523cab8a46409303493cf2aac41fc1f4298 Mon Sep 17 00:00:00 2001
From: JJBcku <154745800+JJBcku@users.noreply.github.com>
Date: Fri, 5 Jul 2024 13:21:33 +0200
Subject: [PATCH] XP: Fix diminishing of kill reputation Closes
 https://github.com/cmangos/mangos-classic/pull/553

---
 src/game/Entities/Player.cpp | 24 +++++++++++++++++-------
 src/game/Tools/Formulas.h    | 30 ++++++++++++++++++++++++++++++
 2 files changed, 47 insertions(+), 7 deletions(-)

diff --git a/src/game/Entities/Player.cpp b/src/game/Entities/Player.cpp
index 1e3b6127e8..c02b06108d 100644
--- a/src/game/Entities/Player.cpp
+++ b/src/game/Entities/Player.cpp
@@ -6282,15 +6282,25 @@ int32 Player::CalculateReputationGain(ReputationSource source, int32 rep, int32
 
     uint32 currentLevel = GetLevel();
 
-    if (MaNGOS::XP::IsTrivialLevelDifference(currentLevel, creatureOrQuestLevel))
-        percent *= minRate;
-    else
+    // Level zero seems to be treated as always equal to players current level in IsTrivialLevelDifference therefore I have skipped level difference penalty computations for that value
+    if (creatureOrQuestLevel > 0)
     {
-        // Pre-3.0.8: Declines with 20% for each level if 6 levels or more below the player down to a minimum (default: 20%)
-        const uint32 treshold = (creatureOrQuestLevel + 5);
+        if (source == REPUTATION_SOURCE_KILL)
+        {
+            if (MaNGOS::XP::IsTrivialLevelDifference(currentLevel, creatureOrQuestLevel))
+            {
+                const uint32 greenRange = MaNGOS::XP::GetQuestGreenRange(currentLevel);
+                percent *= std::max(minRate, (1.0f - (0.2f * (currentLevel - greenRange - creatureOrQuestLevel))));
+            }
+        }
+        else if (source == REPUTATION_SOURCE_QUEST)
+        {
+            // Pre-3.0.8: Declines with 20% for each level if 6 levels or more below the player down to a minimum (default: 20%)
+            const uint32 treshold = (creatureOrQuestLevel + 5);
 
-        if (currentLevel > treshold)
-            percent *= std::max(minRate, (1.0f - (0.2f * (currentLevel - treshold))));
+            if (currentLevel > treshold)
+                percent *= std::max(minRate, (1.0f - (0.2f * (currentLevel - treshold))));
+        }
     }
 
     if (percent <= 0.0f)
diff --git a/src/game/Tools/Formulas.h b/src/game/Tools/Formulas.h
index bc3e06fa92..b449edd3b7 100644
--- a/src/game/Tools/Formulas.h
+++ b/src/game/Tools/Formulas.h
@@ -271,6 +271,36 @@ namespace MaNGOS
             return false;
         }
 
+        inline uint32 GetQuestGreenRange(uint32 unitLvl)
+        {
+            switch (unitLvl / 5)
+            {
+                case 0:     // 0-4
+                case 1:     // 5-9
+                    return 4;
+                case 2:     // 10-14
+                case 3:     // 15-19
+                    return 5;
+                case 4:     // 20-24
+                case 5:     // 25-29
+                    return 6;
+                case 6:     // 30-34
+                case 7:     // 35-39
+                    return 7;
+                case 8:     // 40-44
+                    return 8;
+                case 9:     // 45-49
+                    return 9;
+                case 10:    // 50-54
+                    return 10;
+                case 11:    // 55-59
+                    return 11;
+                default:    // 60+
+                    return 12;
+            }
+            return false;
+        }
+
         enum XPColorChar { RED, ORANGE, YELLOW, GREEN, GRAY };
 
         inline uint32 GetGrayLevel(uint32 pl_level)