Core/ObjectMgr: Move some npc_spellclick_spells and vehicle_accessory related errors to startup instead of post-startup runtime

src/server/game/Entities/Unit/Unit.h

@@ -622,7 +622,7 @@ enum NPCFlags
     UNIT_NPC_FLAG_AUCTIONEER            = 0x00200000,       // 100%
     UNIT_NPC_FLAG_STABLEMASTER          = 0x00400000,       // 100%
     UNIT_NPC_FLAG_GUILD_BANKER          = 0x00800000,       // cause client to send 997 opcode
-    UNIT_NPC_FLAG_SPELLCLICK            = 0x01000000,       // cause client to send 1015 opcode (spell click), dynamic, set at loading and don't must be set in DB
+    UNIT_NPC_FLAG_SPELLCLICK            = 0x01000000,       // cause client to send 1015 opcode (spell click)
     UNIT_NPC_FLAG_PLAYER_VEHICLE        = 0x02000000,       // players with mounts that have vehicle data should have it set
 };
 

src/server/game/Entities/Vehicle/Vehicle.cpp

@@ -248,8 +248,6 @@ void Vehicle::InstallAccessory(uint32 entry, int8 seatId, bool minion, uint8 typ
 
         if (!me->HandleSpellClick(accessory, seatId))
         {
-            sLog->outErrorDb("Vehicle entry %u in vehicle_accessory does not have a valid record in npc_spellclick_spells! Cannot join vehicle.",
-                m_creatureEntry);
             accessory->AddObjectToRemoveList();
             return;
         }

src/server/game/Globals/ObjectMgr.cpp

@@ -2758,7 +2758,6 @@ void ObjectMgr::LoadVehicleAccessories()
         return;
     }
 
-
     do
     {
         Field *fields = result->Fetch();
@@ -2782,6 +2781,12 @@ void ObjectMgr::LoadVehicleAccessories()
             continue;
         }
 
+        if (mSpellClickInfoMap.find(uiEntry) == mSpellClickInfoMap.end())
+        {
+            sLog->outErrorDb("Table `vehicle_accessory`: creature template entry %u has no data in npc_spellclick_spells", uiEntry);
+            continue;
+        }
+
         m_VehicleAccessoryMap[uiEntry].push_back(VehicleAccessory(uiAccessory, uiSeat, bMinion, uiSummonType, uiSummonTimer));
 
         ++count;
@@ -7692,6 +7697,20 @@ void ObjectMgr::LoadNPCSpellClickSpells()
     }
     while (result->NextRow());
 
+    // all spellclick data loaded, now we check if there are creatures with NPC_FLAG_SPELLCLICK but with no data
+    // NOTE: It *CAN* be the other way around: no spellclick flag but with spellclick data, in case of creature-only vehicle accessories
+    for (uint32 i = 0; i < sCreatureStorage.MaxEntry; ++i)
+    {
+        if (CreatureInfo const* cInfo = GetCreatureTemplate(i))
+        {
+            if ((cInfo->npcflag & UNIT_NPC_FLAG_SPELLCLICK) && mSpellClickInfoMap.find(i) == mSpellClickInfoMap.end())
+            {
+                sLog->outErrorDb("npc_spellclick_spells: Creature template %u has UNIT_NPC_FLAG_SPELLCLICK but no data in spellclick table! Removing flag", i);
+                const_cast<CreatureInfo*>(cInfo)->npcflag &= ~UNIT_NPC_FLAG_SPELLCLICK;
+            }
+        }
+    }
+
     sLog->outString(">> Loaded %u spellclick definitions in %u ms", count, GetMSTimeDiffToNow(oldMSTime));
     sLog->outString();
 }

src/server/game/Server/Protocol/Handlers/SpellHandler.cpp

@@ -559,8 +559,8 @@ void WorldSession::HandleSpellClick(WorldPacket & recv_data)
     if (!unit->IsInWorld())
         return;
 
-     if (!unit->HandleSpellClick(_player))
-        sLog->outErrorDb("Missing npc_spellclick_spells data for creature %u", unit->GetEntry());
+    bool unusedReturnValue = unit->HandleSpellClick(_player);
+    // ^ ignore compiler warning 
 }
 
 void WorldSession::HandleMirrrorImageDataRequest(WorldPacket & recv_data)

src/server/game/World/World.cpp

@@ -1363,8 +1363,11 @@ void World::SetInitialWorldSettings()
     sLog->outString("Loading Creature Template Addon Data...");
     sObjectMgr->LoadCreatureAddons();                            // must be after LoadCreatureTemplates() and LoadCreatures()
 
+    sLog->outString("Loading UNIT_NPC_FLAG_SPELLCLICK Data...");
+    sObjectMgr->LoadNPCSpellClickSpells();
+
     sLog->outString("Loading Vehicle Accessories...");
-    sObjectMgr->LoadVehicleAccessories();                        // must be after LoadCreatureTemplates()
+    sObjectMgr->LoadVehicleAccessories();                        // must be after LoadCreatureTemplates() and LoadNPCSpellClickSpells()
 
     sLog->outString("Loading Creature Respawn Data...");         // must be after PackInstances()
     sObjectMgr->LoadCreatureRespawnTimes();
@@ -1408,9 +1411,6 @@ void World::SetInitialWorldSettings()
     sLog->outString("Loading LFG rewards...");
     sLFGMgr->LoadRewards();
 
-    sLog->outString("Loading UNIT_NPC_FLAG_SPELLCLICK Data...");
-    sObjectMgr->LoadNPCSpellClickSpells();
-
     sLog->outString("Loading SpellArea Data...");                // must be after quest load
     sSpellMgr->LoadSpellAreas();