Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
If a monster with a Predator Counter leaves the field while this card is face-up on the field: Add 1 "Predap" card from your Deck to your hand. You can only use this effect of "Predaplanet" once per turn. You can banish this card from your Graveyard; Fusion Summon 1 Fusion Monster from your Extra Deck, using monsters from your hand or field as Fusion Materials. Only "Predaplant" monsters can be used as Fusion Materials for a Fusion Summon using this effect.
--捕食惑星
--Predaplanet
local s,id=GetID()
function s.initial_effect(c)
	--Activate
	local e0=Effect.CreateEffect(c)
	e0:SetType(EFFECT_TYPE_ACTIVATE)
	e0:SetCode(EVENT_FREE_CHAIN)
	c:RegisterEffect(e0)
	--register when a card leaves the field
	local e1=Effect.CreateEffect(c)
	e1:SetType(EFFECT_TYPE_FIELD+EFFECT_TYPE_CONTINUOUS)
	e1:SetCode(EVENT_LEAVE_FIELD_P)
	e1:SetRange(LOCATION_SZONE)
	e1:SetProperty(EFFECT_FLAG_CANNOT_DISABLE)
	e1:SetOperation(s.regop)
	c:RegisterEffect(e1)
	--add to hand
	local e2=Effect.CreateEffect(c)
	e2:SetDescription(aux.Stringid(id,0))
	e2:SetCategory(CATEGORY_TOHAND+CATEGORY_SEARCH)
	e2:SetType(EFFECT_TYPE_FIELD+EFFECT_TYPE_TRIGGER_F)
	e2:SetProperty(EFFECT_FLAG_DAMAGE_STEP)
	e2:SetCode(EVENT_LEAVE_FIELD)
	e2:SetRange(LOCATION_SZONE)
	e2:SetCountLimit(1,id)
	e2:SetCondition(s.thcon)
	e2:SetTarget(s.thtg)
	e2:SetOperation(s.thop)
	e2:SetLabelObject(e1)
	c:RegisterEffect(e2)
	--fusion summon
	local params = {nil,aux.FilterBoolFunction(Card.IsSetCard,SET_PREDAP)}
	local e3=Effect.CreateEffect(c)
	e3:SetDescription(aux.Stringid(id,1))
	e3:SetCategory(CATEGORY_SPECIAL_SUMMON+CATEGORY_FUSION_SUMMON)
	e3:SetType(EFFECT_TYPE_QUICK_O)
	e3:SetCode(EVENT_FREE_CHAIN)
	e3:SetRange(LOCATION_GRAVE)
	e3:SetCost(Cost.SelfBanish)
	e3:SetTarget(Fusion.SummonEffTG(table.unpack(params)))
	e3:SetOperation(Fusion.SummonEffOP(table.unpack(params)))
	c:RegisterEffect(e3)
end
s.listed_series={SET_PREDAP}
s.counter_list={COUNTER_PREDATOR}
function s.lvfdfilter(c)
	return c:IsLocation(LOCATION_MZONE) and c:GetCounter(COUNTER_PREDATOR)>0
end
function s.regop(e,tp,eg,ep,ev,re,r,rp)
	if eg:IsExists(s.lvfdfilter,1,nil) then
		e:SetLabel(1)
	else
		e:SetLabel(0)
	end
end
function s.thcon(e,tp,eg,ep,ev,re,r,rp)
	return e:GetLabelObject():GetLabel()==1
end
function s.thfilter(c)
	return c:IsSetCard(SET_PREDAP) and c:IsAbleToHand()
end
function s.thtg(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then return true end
	Duel.SetOperationInfo(0,CATEGORY_TOHAND,nil,1,tp,LOCATION_DECK)
end
function s.thop(e,tp,eg,ep,ev,re,r,rp)
	if not e:GetHandler():IsRelateToEffect(e) then return end
	Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_ATOHAND)
	local g=Duel.SelectMatchingCard(tp,s.thfilter,tp,LOCATION_DECK,0,1,1,nil)
	if #g>0 then
		Duel.SendtoHand(g,nil,REASON_EFFECT)
		Duel.ConfirmCards(1-tp,g)
	end
end