Core/Players: Implemented item level based armor damage reduction diminishing for pvp

3 files changed, 24 insertions, 2 deletions

diff --git a/src/server/game/DataStores/GameTables.cpp b/src/server/game/DataStores/GameTables.cpp
index 6483b8fd63c..56f214a1d2b 100644
--- a/src/server/game/DataStores/GameTables.cpp
+++ b/src/server/game/DataStores/GameTables.cpp
@@ -33,6 +33,7 @@ GameTable<GtBattlePetXPEntry>                   sBattlePetXPGameTable;
 GameTable<GtCombatRatingsEntry>                 sCombatRatingsGameTable;
 GameTable<GtCombatRatingsMultByILvl>            sCombatRatingsMultByILvlGameTable;
 GameTable<GtHpPerStaEntry>                      sHpPerStaGameTable;
+GameTable<GtItemLevelByLevelEntry>              sItemLevelByLevelTable;
 GameTable<GtItemSocketCostPerLevelEntry>        sItemSocketCostPerLevelGameTable;
 GameTable<GtNpcManaCostScalerEntry>             sNpcManaCostScalerGameTable;
 GameTable<GtSpellScalingEntry>                  sSpellScalingGameTable;
@@ -123,6 +124,7 @@ void LoadGameTables(std::string const& dataPath)
     LOAD_GT(sBattlePetXPGameTable, "BattlePetXP.txt");
     LOAD_GT(sCombatRatingsGameTable, "CombatRatings.txt");
     LOAD_GT(sCombatRatingsMultByILvlGameTable, "CombatRatingsMultByILvl.txt");
+    LOAD_GT(sItemLevelByLevelTable, "ItemLevelByLevel.txt");
     LOAD_GT(sItemSocketCostPerLevelGameTable, "ItemSocketCostPerLevel.txt");
     LOAD_GT(sHpPerStaGameTable, "HpPerSta.txt");
     LOAD_GT(sNpcManaCostScalerGameTable, "NPCManaCostScaler.txt");
diff --git a/src/server/game/DataStores/GameTables.h b/src/server/game/DataStores/GameTables.h
index 188c9b74a65..d6ce6686555 100644
--- a/src/server/game/DataStores/GameTables.h
+++ b/src/server/game/DataStores/GameTables.h
@@ -118,6 +118,11 @@ struct GtItemSocketCostPerLevelEntry
     float SocketCost = 0.0f;
 };
 
+struct GtItemLevelByLevelEntry
+{
+    float ItemLevel = 0.0f;
+};
+
 struct GtNpcManaCostScalerEntry
 {
     float Scaler = 0.0f;
@@ -195,6 +200,7 @@ TC_GAME_API extern GameTable<GtBattlePetXPEntry>                    sBattlePetXP
 TC_GAME_API extern GameTable<GtCombatRatingsEntry>                  sCombatRatingsGameTable;
 TC_GAME_API extern GameTable<GtCombatRatingsMultByILvl>             sCombatRatingsMultByILvlGameTable;
 TC_GAME_API extern GameTable<GtHpPerStaEntry>                       sHpPerStaGameTable;
+TC_GAME_API extern GameTable<GtItemLevelByLevelEntry>               sItemLevelByLevelTable;
 TC_GAME_API extern GameTable<GtItemSocketCostPerLevelEntry>         sItemSocketCostPerLevelGameTable;
 TC_GAME_API extern GameTable<GtNpcManaCostScalerEntry>              sNpcManaCostScalerGameTable;
 TC_GAME_API extern GameTable<GtSpellScalingEntry>                   sSpellScalingGameTable;
diff --git a/src/server/game/Entities/Unit/Unit.cpp b/src/server/game/Entities/Unit/Unit.cpp
index 5c21ec7ac5c..a23fb293312 100644
--- a/src/server/game/Entities/Unit/Unit.cpp
+++ b/src/server/game/Entities/Unit/Unit.cpp
@@ -1713,15 +1713,29 @@ void Unit::HandleEmoteCommand(Emote emoteId, Player* target /*=nullptr*/, Trinit
     if (G3D::fuzzyLe(armor, 0.0f))
         return damage;
 
-    Classes attackerClass = CLASS_WARRIOR;
+    Classes attackerClass = CLASS_NONE;
+    Optional<float> attackerItemLevel;
     if (attacker)
     {
         attackerLevel = attacker->GetLevelForTarget(victim);
-        attackerClass = Classes(attacker->GetClass());
+        if (Player const* ownerPlayer = attacker->GetCharmerOrOwnerPlayerOrPlayerItself())
+            attackerItemLevel = ownerPlayer->m_playerData->AvgItemLevel[AsUnderlyingType(AvgItemLevelCategory::EquippedBase)];
+        else
+            attackerClass = Classes(attacker->GetClass());
     }
 
     // Expansion and ContentTuningID necessary? Does Player get a ContentTuningID too ?
     float armorConstant = sDB2Manager.EvaluateExpectedStat(ExpectedStatType::ArmorConstant, attackerLevel, -2, 0, attackerClass, 0);
+    if (attackerItemLevel)
+    {
+        uint32 maxLevelForExpansion = GetMaxLevelForExpansion(sWorld->getIntConfig(CONFIG_EXPANSION));
+        if (attackerLevel == maxLevelForExpansion)
+        {
+            float itemLevelDelta = *attackerItemLevel - ASSERT_NOTNULL(sItemLevelByLevelTable.GetRow(maxLevelForExpansion))->ItemLevel;
+            if (uint32 curveId = sDB2Manager.GetGlobalCurveId(GlobalCurve::ArmorItemLevelDiminishing))
+                armorConstant *= sDB2Manager.GetCurveValueAt(curveId, itemLevelDelta);
+        }
+    }
 
     if (!(armor + armorConstant))
         return damage;