Abuff questions

// This is a simple copy of the RegularBuffSpellTemplate, just by changing the
// GUI "trigger" name and scope name you can make a new, non-conflicting version
// of the same code in the spirit of the JESP standard, then all that is left to
// do is change the calibration functions and the code is adapted to work for a
// new spell, in this case the Priest's Inner Fire.

// This spell also demonstrates the use of ADamage shields, whenever a unit
// deals damage to a unit with this buff, that damage is reduced by 5.


scope ElvenFire initializer Init

    // CALIBRATION SECTION

    globals
        private constant integer SPELL = 'A003' //the spell that applies the buff
        
        private constant integer AURA_ID = 'A009' //the aura that will give the allied unit the buff
        
        private constant integer DAMAGE_ID = 'Altc'
        private constant integer ARMOR_ID = 'Ald2'
    endglobals

    private constant function Duration takes integer level returns real
        return 60.0 //the duration of the buff
    endfunction
    private constant function HeroDuration takes integer level returns real
        return 60.0 //the duration of the buff for heroes
    endfunction

    // SPELL CODE
    globals
        public aBuffType id = 0
    endglobals
//===========================================================================
    private function Create takes aBuff eventBuff returns nothing
        call UnitAddAbility(eventBuff.target.u, AURA_ID)
        call UnitAddAbility(eventBuff.target.u, DAMAGE_ID)
        call UnitAddAbility(eventBuff.target.u, ARMOR_ID)
    endfunction
//===========================================================================
    private function Refresh takes aBuff eventBuff returns nothing
    endfunction
//===========================================================================
    private function Cleanup takes aBuff eventBuff returns nothing
        call UnitRemoveAbility(eventBuff.target.u, AURA_ID)
        call UnitRemoveAbility(eventBuff.target.u, DAMAGE_ID)
        call UnitRemoveAbility(eventBuff.target.u, ARMOR_ID)
    endfunction
//===========================================================================
    private function SpellCastCondition takes nothing returns boolean
        return GetSpellAbilityId()==SPELL
    endfunction
//===========================================================================
    private function SpellCast takes nothing returns nothing
        local integer level =GetUnitAbilityLevel(GetTriggerUnit(), SPELL)
        local real duration = Duration(level)
        if IsUnitSpellResistant(GetSpellTargetUnit()) then
            set duration = HeroDuration(level)
        endif
        call ABuffApply(id, GetSpellTargetUnit(), GetTriggerUnit(), duration, level, 0)
    endfunction
//===========================================================================
    private function Init takes nothing returns nothing
        local trigger ElvenFireTrg = CreateTrigger(  )
        call TriggerRegisterAnyUnitEventBJ(ElvenFireTrg, EVENT_PLAYER_UNIT_SPELL_EFFECT )
        call TriggerAddCondition(ElvenFireTrg, Condition( function SpellCastCondition ) )
        call TriggerAddAction(ElvenFireTrg, function SpellCast )

        set id = aBuffType.create()

        set id.eventCreate = ABuffEvent_Create.Create
        set id.eventRefresh = ABuffEvent_Refresh.Refresh
        set id.eventCleanup = ABuffEvent_Cleanup.Cleanup

    endfunction
endscope