aura.lua

	local playerUnits = {
		player  = true,
		pet     = true,
		vehicle = true
	}

	local dispelTypes = {
		Magic   = true,
		Curse   = true,
		Disease = true,
		Poison  = true
	}

ns.CustomAuraFilter = function(element, unit, icon, name, rank, texture, count, dType, duration, timeLeft, caster, isStealable, shouldConsolidate, spellID, canApplyAura, isBossCast,_, nameplateShowAll)
		local filter  = icon.filter
		local hostile = UnitCanAttack('player', unit) or not UnitCanAssist('player', unit)

		if isBossCast then					--  all boss auras go through
			return true
											--  as do all vehicle-cast auras
		elseif caster and UnitIsUnit(caster, 'vehicle') and not UnitIsPlayer'vehicle' then
			return true
		end

		if hostile then						--  enemy
			if filter == 'HELPFUL' then		--  buff
				if  isStealable or (caster and UnitIsUnit(unit, caster)) or nameplateShowAll then
					return true
				end
			elseif filter == 'HARMFUL' then	--  debuff
				local custom, _, showforSpec = SpellGetVisibilityInfo(spellID, 'ENEMY_TARGET')
				if playerUnits[icon.owner] or SpellIsAlwaysShown(spellID) or (custom and showforSpec) or nameplateShowAll then
					return true
				end
			end
		else								--  friend
			local custom, _, showforSpec = SpellGetVisibilityInfo(spellID, UnitAffectingCombat'player' and 'RAID_INCOMBAT' or 'RAID_OUTOFCOMBAT')
			if filter == 'HELPFUL' then		--  buff
				if UnitAura(unit, name, nil, filter..'|RAID') or (custom and showforSpec) or UnitIsUnit(caster, 'player') then
					return true
				end
			elseif filter == 'HARMFUL' then	--  debuff
				if (dispelTypes[dType] and UnitAura(unit, name, nil, filter..'|RAID')) or (custom and showforSpec) or UnitIsUnit(caster, 'player') then
					return true
				end
			end
		end
		return false
	end