feat(Core/Hooks): added collection of hooks to extends AC (#3047)

This collection of hooks comes from the Maelstrom project. It allows to release modules such as :
- 3v3-soloqueue
- 1v1 arena
- pvestats

and many others

src/server/game/Handlers/SpellHandler.cpp

@@ -15,6 +15,7 @@
 #include "ScriptMgr.h"
 #include "Spell.h"
 #include "SpellAuraEffects.h"
+#include "ScriptMgr.h"
 #include "SpellAuras.h"
 #include "SpellMgr.h"
 #include "TemporarySummon.h"
@@ -343,6 +344,8 @@ void WorldSession::HandleCastSpellOpcode(WorldPacket& recvPacket)
     uint8  castCount, castFlags;
     recvPacket >> castCount >> spellId >> castFlags;
 
+    uint32 oldSpellId = spellId;
+
 #if defined(ENABLE_EXTRAS) && defined(ENABLE_EXTRA_LOGS)
     sLog->outDebug(LOG_FILTER_NETWORKIO, "WORLD: got cast spell packet, castCount: %u, spellId: %u, castFlags: %u, data length = %u", castCount, spellId, castFlags, (uint32)recvPacket.size());
 #endif
@@ -404,6 +407,11 @@ void WorldSession::HandleCastSpellOpcode(WorldPacket& recvPacket)
         }
     }
 
+    sScriptMgr->ValidateSpellAtCastSpell(_player, oldSpellId, spellId, castCount, castFlags);
+
+    if (oldSpellId != spellId)
+        spellInfo = sSpellMgr->GetSpellInfo(spellId);
+
     // Client is resending autoshot cast opcode when other spell is casted during shoot rotation
     // Skip it to prevent "interrupt" message
     if (spellInfo->IsAutoRepeatRangedSpell() && _player->GetCurrentSpell(CURRENT_AUTOREPEAT_SPELL)
@@ -443,6 +451,9 @@ void WorldSession::HandleCastSpellOpcode(WorldPacket& recvPacket)
     }
 
     Spell* spell = new Spell(mover, spellInfo, TRIGGERED_NONE, 0, false);
+
+    sScriptMgr->ValidateSpellAtCastSpellResult(_player, mover, spell, oldSpellId, spellId);
+
     spell->m_cast_count = castCount;                       // set count of casts
     spell->prepare(&targets);
 }