sdm03/src/main/java/com/github/dtschust/zork/ZorkConditionHas.java

package com.github.dtschust.zork;

import java.util.Set;

/* Has conditions*/
public class ZorkConditionHas extends ZorkCondition {
    private final String has;
    private final String owner;

    public ZorkConditionHas(String has, String object, String owner) {
        super(object);
        this.has = has;
        this.owner = owner;
    }

    @Override
    public boolean evaluate(Zork zork) {
        /*Inventory is a special case as it isn't the name of any object in the game, check for it specifically*/
        if (owner.equals("inventory")) {
            return evaluateCondition(zork.game.Inventory, object);
        } else {
            /* is it a room?*/
            ZorkRoom roomObject = zork.game.Rooms.get(owner);
            if (roomObject != null) {
                return evaluateCondition(roomObject.item, object);
            }
            /* is it a container?*/
            else {
                ZorkContainer containerObject = zork.game.Containers.get(owner);
                if (containerObject != null) {
                    return evaluateCondition(containerObject.item, object);
                }
            }
        }

        return false;
    }

    private boolean evaluateCondition(Set items, String object){
        if(has.equals("yes")) return items.contains(object);
        else if(has.equals("no")) return !items.contains(object);
        return false;
    }
}