npc_dynamic_shop.txt

//===== rAthena Script =======================================
//= Sample: Dynamic Shop
//===== By: ==================================================
//= Lance
//===== Last Updated: ========================================
//= 20140208
//===== Description: ========================================= 
//= Contains commands needed for a dynamic shop.
//============================================================

// Dummy shop to insert items into:
-	shop	dyn_shop1	-1,501:50.

prontera,181,200,4	script	Dynamic Shop	123,{
	callshop "dyn_shop1",0;
	npcshopattach "dyn_shop1";
	end;

OnSellItem:
	for (.@i = 0; .@i < getarraysize(@sold_nameid); .@i++) {
		if (countitem(@sold_nameid[.@i]) < @sold_quantity[.@i] || @sold_quantity[.@i] <= 0) {
			mes "omgh4x!";
			close;
		} else if (@sold_nameid[.@i] == 501){
			delitem 501, @sold_quantity[.@i];
			set $@rpotsleft, $@rpotsleft + @sold_quantity[.@i];
			set Zeny, Zeny + @sold_quantity[.@i]*20;
		} else if (@sold_nameid[.@i] == 502){
			delitem 502, @sold_quantity[.@i];
			$@opotsleft += @sold_quantity[.@i];
			set Zeny, Zeny + @sold_quantity[.@i]*100;
		} else {
			mes "Sorry, I don't need your items.";
			close;
		}
	}
	deletearray @sold_quantity, getarraysize(@sold_quantity);
	deletearray @sold_nameid, getarraysize(@sold_nameid);
	mes "Deal completed.";
	close;

OnBuyItem:
	for (.@i = 0; .@i < getarraysize(@bought_nameid); .@i++){
		if (@bought_quantity[.@i] <= 0){
			mes "omgh4x!";
			close;
		} else if (@bought_nameid[.@i] == 501){
			if (@bought_quantity[.@i] > $@rpotsleft){
				if ($@rpotsleft > 0){
					@bought_quantity[.@i] = $@rpotsleft;
				} else {
					mes "We are out of red potions!";
					close;
				}
			}
			if (Zeny >= 40*@bought_quantity[.@i]){
				set Zeny, Zeny - 40*@bought_quantity[.@i];
				getitem 501, @bought_quantity[.@i];
				$@rpotsleft -= @bought_quantity[.@i];
			} else {
				mes "You have insufficient cash.";
				close;
			}
		} else /*if (@bought_nameid[.@i] == 502)*/ {
			if (@bought_quantity[.@i] > $@opotsleft){
				if ($@opotsleft > 0){
					@bought_quantity[.@i] = $@opotsleft;
				} else {
					mes "We are out of orange potions!";
					close;
				}
			}
			if (Zeny >= 200*@bought_quantity[.@i]){
				set Zeny, Zeny - 200*@bought_quantity[.@i];
				getitem 502, @bought_quantity[.@i];
				$@opotsleft -= @bought_quantity[.@i];
			} else {
				mes "You have insufficient cash.";
				close;
			}
		}
	}
	deletearray @bought_quantity, getarraysize(@bought_quantity);
	deletearray @bought_nameid, getarraysize(@bought_nameid);
	mes "Trade done.";
	close;

OnInit:
	npcshopitem "dyn_shop1", 501,40,502,200;
	$@rpotsleft = 10;
	$@opotsleft = 10;
	end;
}