Creature/Scripting: Move CreatureAI::CanRespawn to CreatureScript::CanSpawn. Now also applies to initial spawn. Dynamic spawning prep.

(cherry picked from commit b3d44d6c366c7e4f12a6ce30ee5cf6b9bff68a06)

Game/Scripting: Follow-up to b3d44d6. Fix script selection for creatures on difficulty > 0.
(cherry picked from commit 91c2b3162d350ab1a09053574ad67f45f089175b)

Build fix.
(cherry picked from commit a9f1151f2ca56394e315d0b07741c240ef59c2ff)

Fine, this time I actually built it. Promise.
(cherry picked from commit 0c2c88ed5025d9b51b6cbdf0603ceaf1ea54c80a)

2 files changed, 15 insertions, 0 deletions

diff --git a/src/server/game/Scripting/ScriptMgr.cpp b/src/server/game/Scripting/ScriptMgr.cpp
index 7c94aa3ed55..8ad749ef53a 100644
--- a/src/server/game/Scripting/ScriptMgr.cpp
+++ b/src/server/game/Scripting/ScriptMgr.cpp
@@ -1706,6 +1706,15 @@ uint32 ScriptMgr::GetDialogStatus(Player* player, Creature* creature)
     return tmpscript->GetDialogStatus(player, creature);
 }
 
+bool ScriptMgr::CanSpawn(ObjectGuid::LowType spawnId, uint32 entry, CreatureTemplate const* actTemplate, CreatureData const* cData, Map const* map)
+{
+    ASSERT(actTemplate);
+
+    CreatureTemplate const* baseTemplate = sObjectMgr->GetCreatureTemplate(entry);
+    GET_SCRIPT_RET(CreatureScript, baseTemplate->ScriptID, tmpscript, true);
+    return tmpscript->CanSpawn(spawnId, entry, baseTemplate, actTemplate, cData, map);
+}
+
 CreatureAI* ScriptMgr::GetCreatureAI(Creature* creature)
 {
     ASSERT(creature);
diff --git a/src/server/game/Scripting/ScriptMgr.h b/src/server/game/Scripting/ScriptMgr.h
index 76a5f663f82..72b71651bd9 100644
--- a/src/server/game/Scripting/ScriptMgr.h
+++ b/src/server/game/Scripting/ScriptMgr.h
@@ -68,6 +68,8 @@ struct AreaTriggerEntry;
 struct AuctionEntry;
 struct ConditionSourceInfo;
 struct Condition;
+struct CreatureTemplate;
+struct CreatureData;
 struct ItemTemplate;
 struct MapEntry;
 struct OutdoorPvPData;
@@ -436,6 +438,9 @@ class TC_GAME_API CreatureScript : public UnitScript, public UpdatableScript<Cre
         // Called when the dialog status between a player and the creature is requested.
         virtual uint32 GetDialogStatus(Player* /*player*/, Creature* /*creature*/) { return DIALOG_STATUS_SCRIPTED_NO_STATUS; }
 
+        // Called when the creature tries to spawn. Return false to block spawn and re-evaluate on next tick.
+        virtual bool CanSpawn(ObjectGuid::LowType /*spawnId*/, uint32 /*entry*/, CreatureTemplate const* /*baseTemplate*/, CreatureTemplate const* /*actTemplate*/, CreatureData const* /*cData*/, Map const* /*map*/) const { return true; }
+
         // Called when a CreatureAI object is needed for the creature.
         virtual CreatureAI* GetAI(Creature* /*creature*/) const { return NULL; }
 };
@@ -1016,6 +1021,7 @@ class TC_GAME_API ScriptMgr
         bool OnQuestSelect(Player* player, Creature* creature, Quest const* quest);
         bool OnQuestReward(Player* player, Creature* creature, Quest const* quest, uint32 opt);
         uint32 GetDialogStatus(Player* player, Creature* creature);
+        bool CanSpawn(ObjectGuid::LowType spawnId, uint32 entry, CreatureTemplate const* actTemplate, CreatureData const* cData, Map const* map);
         CreatureAI* GetCreatureAI(Creature* creature);
         void OnCreatureUpdate(Creature* creature, uint32 diff);