Core/Player: Introduce separate level caps for each expansion

src/server/game/Entities/Player/Player.cpp

@@ -2276,7 +2276,7 @@ void Player::GiveXP(uint32 xp, Unit* victim, float group_rate)
     sScriptMgr->OnGivePlayerXP(this, xp, victim);
 
     // XP to money conversion processed in Player::RewardQuest
-    if (level >= sWorld->getIntConfig(CONFIG_MAX_PLAYER_LEVEL))
+    if (IsMaxLevel())
         return;
 
     uint32 bonus_xp;
@@ -2294,11 +2294,11 @@ void Player::GiveXP(uint32 xp, Unit* victim, float group_rate)
     uint32 nextLvlXP = GetUInt32Value(PLAYER_NEXT_LEVEL_XP);
     uint32 newXP = curXP + xp + bonus_xp;
 
-    while (newXP >= nextLvlXP && level < sWorld->getIntConfig(CONFIG_MAX_PLAYER_LEVEL))
+    while (newXP >= nextLvlXP && !IsMaxLevel())
     {
         newXP -= nextLvlXP;
 
-        if (level < sWorld->getIntConfig(CONFIG_MAX_PLAYER_LEVEL))
+        if (!IsMaxLevel())
             GiveLevel(level + 1);
 
         level = getLevel();
@@ -2407,6 +2407,11 @@ void Player::GiveLevel(uint8 level)
     sScriptMgr->OnPlayerLevelChanged(this, oldLevel);
 }
 
+bool Player::IsMaxLevel() const
+{
+    return getLevel() >= GetUInt32Value(PLAYER_FIELD_MAX_LEVEL);
+}
+
 void Player::InitTalentForLevel()
 {
     uint8 level = getLevel();
@@ -2458,7 +2463,12 @@ void Player::InitStatsForLevel(bool reapplyMods)
     PlayerLevelInfo info;
     sObjectMgr->GetPlayerLevelInfo(getRace(), getClass(), getLevel(), &info);
 
-    SetUInt32Value(PLAYER_FIELD_MAX_LEVEL, sWorld->getIntConfig(CONFIG_MAX_PLAYER_LEVEL));
+    uint8 exp_max_lvl = DBCManager::GetMaxLevelForExpansion(GetSession()->GetExpansion());
+    uint8 conf_max_lvl = sWorld->getIntConfig(CONFIG_MAX_PLAYER_LEVEL);
+    if (exp_max_lvl == DEFAULT_MAX_LEVEL || exp_max_lvl >= conf_max_lvl)
+        SetUInt32Value(PLAYER_FIELD_MAX_LEVEL, conf_max_lvl);
+    else
+        SetUInt32Value(PLAYER_FIELD_MAX_LEVEL, exp_max_lvl);
     SetUInt32Value(PLAYER_NEXT_LEVEL_XP, sObjectMgr->GetXPForLevel(getLevel()));
 
     // reset before any aura state sources (health set/aura apply)
@@ -6138,10 +6148,8 @@ void Player::CheckAreaExploreAndOutdoor()
 
         if (areaEntry->ExplorationLevel > 0)
         {
-            if (getLevel() >= sWorld->getIntConfig(CONFIG_MAX_PLAYER_LEVEL))
-            {
+            if (IsMaxLevel())
                 SendExplorationExperience(areaId, 0);
-            }
             else
             {
                 int32 diff = int32(getLevel()) - areaEntry->ExplorationLevel;
@@ -14968,7 +14976,7 @@ void Player::RewardQuest(Quest const* quest, uint32 reward, Object* questGiver,
     for (Unit::AuraEffectList::const_iterator i = ModXPPctAuras.begin(); i != ModXPPctAuras.end(); ++i)
         AddPct(XP, (*i)->GetAmount());
 
-    if (getLevel() < sWorld->getIntConfig(CONFIG_MAX_PLAYER_LEVEL))
+    if (!IsMaxLevel())
         GiveXP(XP, nullptr);
 
     if (Guild* guild = GetGuild())
@@ -16591,7 +16599,7 @@ void Player::SendQuestReward(Quest const* quest, Creature const* questGiver, uin
     sGameEventMgr->HandleQuestComplete(questId);
 
     uint32 XP = 0;
-    if (getLevel() < sWorld->getIntConfig(CONFIG_MAX_PLAYER_LEVEL))
+    if (!IsMaxLevel())
         XP = xp;
 
     WorldPackets::Quest::QuestGiverQuestComplete packet;
@@ -21653,7 +21661,7 @@ void Player::LeaveAllArenaTeams(ObjectGuid guid)
 void Player::SetRestBonus(float rest_bonus_new)
 {
     // Prevent resting on max level
-    if (getLevel() >= sWorld->getIntConfig(CONFIG_MAX_PLAYER_LEVEL))
+    if (IsMaxLevel())
         rest_bonus_new = 0;
 
     if (rest_bonus_new < 0)