Core/SpellScripts: implement Spell Proc Hooks and use it in old and new proc system

Hooks:
- DoCheckProc: executed when aura checks if it can proc
- DoPrepareProc: executed before aura procs (possibility to prevent charge drop/cooldown)
- OnProc: executed when aura procs
- OnEffectProc: executed when aura effect procs
- AfterEffectProc: executed after aura effect proced
- AfterProc: executed after aura proced and charges removed

using PreventDefaultAction() in DoPrepareProc will prevent charge drop and cooldown

default execution of a proc can prevented in OnEffectProc with PreventDefaultAction()

Now we should be able to convert almost all procs from Unit::ProcDamageAndSpellFor to SpellScripts

Notes to old proc system:
- if a proc has a cooldown we must check it in spellscript and add it when we handle the proc
- behavior with charge drops is possible undefined (use PreventDefaultAction() in OnEffectProc to notify that the script is executed)

src/server/game/Entities/Unit/Unit.cpp

@@ -14452,7 +14452,8 @@ void Unit::ProcDamageAndSpellFor(bool isVictim, Unit* target, uint32 procFlag, u
     Unit* actionTarget = !isVictim ? target : this;
 
     DamageInfo damageInfo = DamageInfo(actor, actionTarget, damage, procSpell, procSpell ? SpellSchoolMask(procSpell->SchoolMask) : SPELL_SCHOOL_MASK_NORMAL, SPELL_DIRECT_DAMAGE);
-    ProcEventInfo eventInfo = ProcEventInfo(actor, actionTarget, target, procFlag, 0, 0, procExtra, NULL, &damageInfo, NULL /*HealInfo*/);
+    HealInfo healInfo = HealInfo(actor, actionTarget, damage, procSpell, procSpell ? SpellSchoolMask(procSpell->SchoolMask) : SPELL_SCHOOL_MASK_NORMAL);
+    ProcEventInfo eventInfo = ProcEventInfo(actor, actionTarget, target, procFlag, 0, 0, procExtra, NULL, &damageInfo, &healInfo);
 
     ProcTriggeredList procTriggered;
     // Fill procTriggered list
@@ -14483,6 +14484,10 @@ void Unit::ProcDamageAndSpellFor(bool isVictim, Unit* target, uint32 procFlag, u
         if (!sConditionMgr->IsObjectMeetToConditions(condInfo, conditions))
             continue;
 
+        // AuraScript Hook
+        if (!triggerData.aura->CallScriptCheckProcHandlers(itr->second, eventInfo))
+            continue;
+
         // Triggered spells not triggering additional spells
         bool triggered = !(spellProto->AttributesEx3 & SPELL_ATTR3_CAN_PROC_WITH_TRIGGERED) ?
             (procExtra & PROC_EX_INTERNAL_TRIGGERED && !(procFlag & PROC_FLAG_DONE_TRAP_ACTIVATION)) : false;
@@ -14531,15 +14536,21 @@ void Unit::ProcDamageAndSpellFor(bool isVictim, Unit* target, uint32 procFlag, u
         SpellInfo const* spellInfo = i->aura->GetSpellInfo();
         uint32 Id = i->aura->GetId();
 
+        AuraApplication const* aurApp = i->aura->GetApplicationOfTarget(GetGUID());
+
+        bool prepare = i->aura->CallScriptPrepareProcHandlers(aurApp, eventInfo);
+
         // For players set spell cooldown if need
         uint32 cooldown = 0;
-        if (GetTypeId() == TYPEID_PLAYER && i->spellProcEvent && i->spellProcEvent->cooldown)
+        if (prepare && GetTypeId() == TYPEID_PLAYER && i->spellProcEvent && i->spellProcEvent->cooldown)
             cooldown = i->spellProcEvent->cooldown;
 
         // Note: must SetCantProc(false) before return
         if (spellInfo->AttributesEx3 & SPELL_ATTR3_DISABLE_PROC)
             SetCantProc(true);
 
+        i->aura->CallScriptProcHandlers(aurApp, eventInfo);
+
         // This bool is needed till separate aura effect procs are still here
         bool handled = false;
         if (HandleAuraProc(target, damage, i->aura, procSpell, procFlag, procExtra, cooldown, &handled))
@@ -14558,6 +14569,13 @@ void Unit::ProcDamageAndSpellFor(bool isVictim, Unit* target, uint32 procFlag, u
                 AuraEffect* triggeredByAura = i->aura->GetEffect(effIndex);
                 ASSERT(triggeredByAura);
 
+                bool prevented = i->aura->CallScriptEffectProcHandlers(triggeredByAura, aurApp, eventInfo);
+                if (prevented)
+                {
+                    takeCharges = true;
+                    continue;
+                }
+
                 switch (triggeredByAura->GetAuraType())
                 {
                     case SPELL_AURA_PROC_TRIGGER_SPELL:
@@ -14725,13 +14743,16 @@ void Unit::ProcDamageAndSpellFor(bool isVictim, Unit* target, uint32 procFlag, u
                         takeCharges = true;
                         break;
                 } // switch (triggeredByAura->GetAuraType())
+                i->aura->CallScriptAfterEffectProcHandlers(triggeredByAura, aurApp, eventInfo);
             } // for (uint8 effIndex = 0; effIndex < MAX_SPELL_EFFECTS; ++effIndex)
         } // if (!handled)
 
         // Remove charge (aura can be removed by triggers)
-        if (useCharges && takeCharges)
+        if (prepare && useCharges && takeCharges)
             i->aura->DropCharge();
 
+        i->aura->CallScriptAfterProcHandlers(aurApp, eventInfo);
+
         if (spellInfo->AttributesEx3 & SPELL_ATTR3_DISABLE_PROC)
             SetCantProc(false);
     }
@@ -14752,7 +14773,7 @@ void Unit::GetProcAurasTriggeredOnEvent(std::list<AuraApplication*>& aurasTrigge
             if (!(*itr)->GetRemoveMode())
                 if ((*itr)->GetBase()->IsProcTriggeredOnEvent(*itr, eventInfo))
                 {
-                    (*itr)->GetBase()->PrepareProcToTrigger();
+                    (*itr)->GetBase()->PrepareProcToTrigger(*itr, eventInfo);
                     aurasTriggeringProc.push_back(*itr);
                 }
         }
@@ -14764,7 +14785,7 @@ void Unit::GetProcAurasTriggeredOnEvent(std::list<AuraApplication*>& aurasTrigge
         {
             if (itr->second->GetBase()->IsProcTriggeredOnEvent(itr->second, eventInfo))
             {
-                itr->second->GetBase()->PrepareProcToTrigger();
+                itr->second->GetBase()->PrepareProcToTrigger(itr->second, eventInfo);
                 aurasTriggeringProc.push_back(itr->second);
             }
         }