ObjectivePropertyVariable.java

/**
 * BetonQuest - advanced quests for Bukkit
 * Copyright (C) 2016  Jakub "Co0sh" Sapalski
 * 
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 * 
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
package pl.betoncraft.betonquest.variables;

import pl.betoncraft.betonquest.BetonQuest;
import pl.betoncraft.betonquest.Instruction;
import pl.betoncraft.betonquest.InstructionParseException;
import pl.betoncraft.betonquest.ObjectiveID;
import pl.betoncraft.betonquest.api.Objective;
import pl.betoncraft.betonquest.api.Variable;

/**
 * Resolves to a specified property of an objective.
 * 
 * @author Jakub Sapalski
 */
public class ObjectivePropertyVariable extends Variable {

	private ObjectiveID objective;
	private String propertyName;
	
	public ObjectivePropertyVariable(Instruction instruction) throws InstructionParseException {
		super(instruction);
		objective = instruction.getObjective();
		propertyName = instruction.next();
	}

	@Override
	public String getValue(String playerID) {
		Objective objective = BetonQuest.getInstance().getObjective(this.objective);
		// existence of an objective is checked now because it may not exist yet
		// when variable is created (in case of "message" event)
		if (objective == null)
			return "";
		return (objective.containsPlayer(playerID) ? objective.getProperty(propertyName, playerID) : "");
	}

}