Aura Template

library BashAura initializer Init requires ABuff, ABuffAura, ABuffHeroSkill, ABuffDisplay

    globals
    // BUFF EFFECT
        private constant integer BUFF_ABILITY = 'A000' //the bash ability that units under the effect of the aura gain
    // BUFF VISUALS
        private constant integer BUFF_AURA = 'A001' //the self-targeting aura that places the buff in the unit's status card
        private constant integer BUFF = 'B000' //the buff bestowed upon the unit by the aura

    // MAIN AURA HERO SKILL
        private constant integer AURA = 'A002' //the dummy aura ability on the hero
    endglobals

    private function Range takes integer level returns real
        // This is the area of effect of the aura.
        return 800.0
    endfunction

    private function Targets takes unit affected, unit auraGiver returns boolean
        // This function follows the ABuffAuraTargets function interface
        // and defines what units can be affected by the aura.
        return not(IsUnitEnemy(affected, GetOwningPlayer(auraGiver))) and not(IsUnitType(affected, UNIT_TYPE_MECHANICAL)) and not(IsUnitType(affected, UNIT_TYPE_STRUCTURE))
    endfunction

// ================================================================

    // BUFF CODE
    globals
        private aBuffType auraBuff
    endglobals
    private function BuffApply takes aBuff eventBuff returns nothing
        //add the bash ability when the unit enters aura range.
        call UnitAddAbility(eventBuff.target.u, BUFF_ABILITY)
        call SetUnitAbilityLevel(eventBuff.target.u, BUFF_ABILITY, eventBuff.level)
        call UnitMakeAbilityPermanent(eventBuff.target.u, true, BUFF_ABILITY) //prevent morphing from removing the ability
    endfunction
    private function BuffCleanup takes aBuff eventBuff returns nothing
        //remove the bash ability when the unit leaves aura range.
        call UnitRemoveAbility(eventBuff.target.u, BUFF_ABILITY)
    endfunction

    // ABILITY CODE
    globals
        private aBuffType auraSource
    endglobals
    private function AuraSet takes aBuff eventBuff returns nothing
        call UnitSetABuffAura(eventBuff.target.u, auraBuff, eventBuff.level, Targets, Range(eventBuff.level))
    endfunction
    private function AuraRemove takes aBuff eventBuff returns nothing
        call UnitRemoveABuffAura(eventBuff.target.u, auraBuff)
    endfunction

// ================================================================

    // ABILITY INITIALIZATION
    private function Init takes nothing returns nothing
        //this is the aura buff which gives units the bash ability
        set auraBuff=aBuffType.create()
        set auraBuff.eventCreate = BuffApply
        set auraBuff.eventRefresh = BuffApply
        set auraBuff.eventCleanup = BuffCleanup
        set auraBuff.countsAsBuff = false

        set auraBuff.display = aBuffDisplay.create(BUFF_AURA, BUFF)

        //this is the hero buff which makes the hero a source of the aura
        //when he learns the AURA ability (thanks to ABuffHeroSkill)
        set auraSource=aBuffType.create()
        set auraSource.eventCreate = AuraSet
        set auraSource.eventRefresh = AuraSet
        set auraSource.eventCleanup = AuraRemove
        set auraSource.ignoreAsBuff = true
        
        call NewABuffHeroSkill(AURA, auraSource)
    endfunction

        private constant integer BUFF_AURA = 'A001' //the self-targeting aura that places the buff in the unit's status card
        private constant integer BUFF = 'B000' //the buff bestowed upon the unit by the aura

    // MAIN AURA HERO SKILL
        private constant integer AURA = 'A002' //the dummy aura ability on the hero