nullptr fix

* dont apply XPRate if bot is in group with real player

https://github.com/liyunfan1223/mod-playerbots/issues/1490

* Optimize code

* Oops minor correction

* Defense check on the player itself

* Safer way to check the leader is real player.

* Added abit more defense programming, should be needed still ..why not

src/PlayerbotAI.cpp

@@ -4214,19 +4214,6 @@ bool PlayerbotAI::AllowActive(ActivityType activityType)
         }
     }
 
-    // only keep updating till initializing time has completed,
-    // which prevents unneeded expensive GameTime calls.
-    if (_isBotInitializing)
-    {
-        _isBotInitializing = GameTime::GetUptime().count() < sPlayerbotAIConfig->maxRandomBots * 0.11;
-
-        // no activity allowed during bot initialization
-        if (_isBotInitializing)
-        {
-            return false;
-        }
-    }
-
     // General exceptions
     if (activityType == PACKET_ACTIVITY)
     {

src/PlayerbotAI.h

@@ -611,7 +611,6 @@ private:
     Item* FindItemInInventory(std::function<bool(ItemTemplate const*)> checkItem) const;
     void HandleCommands();
     void HandleCommand(uint32 type, const std::string& text, Player& fromPlayer, const uint32 lang = LANG_UNIVERSAL);
-    bool _isBotInitializing = false;
 
 protected:
     Player* bot;

src/Playerbots.cpp

@@ -108,7 +108,7 @@ public:
                     "|cffcccccchttps://github.com/liyunfan1223/mod-playerbots|r");
             }
 
-            if (sPlayerbotAIConfig->enabled || sPlayerbotAIConfig->randomBotAutologin)
+            /*if (sPlayerbotAIConfig->enabled || sPlayerbotAIConfig->randomBotAutologin)
             {
                 std::string roundedTime =
                     std::to_string(std::ceil((sPlayerbotAIConfig->maxRandomBots * 0.11 / 60) * 10) / 10.0);
@@ -117,7 +117,7 @@ public:
                 ChatHandler(player->GetSession()).SendSysMessage(
                     "|cff00ff00Playerbots:|r bot initialization at server startup takes about '" 
                     + roundedTime + "' minutes.");
-            }
+            }*/
         }
     }
 
@@ -209,17 +209,31 @@ public:
 
     void OnPlayerGiveXP(Player* player, uint32& amount, Unit* /*victim*/, uint8 /*xpSource*/) override
     {
-        if (!player->GetSession()->IsBot())
+        // early return
+        if (sPlayerbotAIConfig->randomBotXPRate == 1.0 || !player)
             return;
 
-        if (!sRandomPlayerbotMgr->IsRandomBot(player))
+        // no XP multiplier, when player is no bot.
+        if (!player->GetSession()->IsBot() || !sRandomPlayerbotMgr->IsRandomBot(player))
             return;
 
-        if (sPlayerbotAIConfig->randomBotXPRate != 1.0)
+        // no XP multiplier, when bot has group where leader is a real player.
+        if (Group* group = player->GetGroup())
         {
-            amount = static_cast<uint32>(std::round(static_cast<float>(amount) * sPlayerbotAIConfig->randomBotXPRate));
+            Player* leader = group->GetLeader();
+            if (leader && leader != player)
+            {
+                if (PlayerbotAI* leaderBotAI = GET_PLAYERBOT_AI(leader))
+                {
+                    if (leaderBotAI->HasRealPlayerMaster())
+                        return;
                 }
             }
+        }
+
+        // otherwise apply bot XP multiplier.
+        amount = static_cast<uint32>(std::round(static_cast<float>(amount) * sPlayerbotAIConfig->randomBotXPRate));
+    }
 };
 
 class PlayerbotsMiscScript : public MiscScript

src/factory/PlayerbotFactory.cpp

@@ -164,15 +164,16 @@ void PlayerbotFactory::Init()
         {
             continue;
         }
-        ItemTemplate const* proto = sObjectMgr->GetItemTemplate(gemId);
         
+        ItemTemplate const* proto = sObjectMgr->GetItemTemplate(gemId);
+        if (proto) {
             if (proto->ItemLevel < 60)
                 continue;
 
             if (proto->Flags & ITEM_FLAG_UNIQUE_EQUIPPABLE)
-        {
                continue;
         }
+        
         if (sRandomItemMgr->IsTestItem(gemId))
             continue;
 
@@ -180,9 +181,11 @@ void PlayerbotFactory::Init()
         {
             continue;
         }
+        
         // LOG_INFO("playerbots", "Add {} to enchantment gems", gemId);
         enchantGemIdCache.push_back(gemId);
     }
+    
     LOG_INFO("playerbots", "Loading {} enchantment gems", enchantGemIdCache.size());
 }
 
@@ -1017,8 +1020,9 @@ void PlayerbotFactory::ClearSkills()
     }
     bot->SetUInt32Value(PLAYER_SKILL_INDEX(0), 0);
     bot->SetUInt32Value(PLAYER_SKILL_INDEX(1), 0);
+
     // unlearn default race/class skills
-    PlayerInfo const* info = sObjectMgr->GetPlayerInfo(bot->getRace(), bot->getClass());
+    if (PlayerInfo const* info = sObjectMgr->GetPlayerInfo(bot->getRace(), bot->getClass())) {
         for (PlayerCreateInfoSkills::const_iterator itr = info->skills.begin(); itr != info->skills.end(); ++itr)
         {
             uint32 skillId = itr->SkillId;
@@ -1026,6 +1030,7 @@ void PlayerbotFactory::ClearSkills()
                 continue;
             bot->SetSkill(skillId, 0, 0, 0);
         }
+    }
 }
 
 void PlayerbotFactory::ClearEverything()