CheckCondition.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.conditions;

import java.lang.reflect.InvocationTargetException;
import java.util.ArrayList;

import pl.betoncraft.betonquest.BetonQuest;
import pl.betoncraft.betonquest.Instruction;
import pl.betoncraft.betonquest.InstructionParseException;
import pl.betoncraft.betonquest.QuestRuntimeException;
import pl.betoncraft.betonquest.api.Condition;

/**
 * Allows for checking multiple conditions with one instruction string.
 * 
 * @author Jakub Sapalski
 */
public class CheckCondition extends Condition {

	ArrayList<Condition> internalConditions = new ArrayList<>();

	public CheckCondition(Instruction instruction) throws InstructionParseException {
		super(instruction);
		String[] parts = instruction.getInstruction().substring(5).trim().split(" ");
		if (parts.length < 1) {
			throw new InstructionParseException("Not enough arguments");
		}
		StringBuilder builder = new StringBuilder();
		for (String part : parts) {
			if (part.startsWith("^")) {
				if (builder.length() != 0) {
					internalConditions.add(createCondition(builder.toString().trim()));
					builder = new StringBuilder();
				}
				builder.append(part.substring(1) + " ");
			} else {
				builder.append(part + " ");
			}
		}
		internalConditions.add(createCondition(builder.toString().trim()));
	}

	/**
	 * Constructs a condition with given instruction and returns it.
	 */
	private Condition createCondition(String instruction) throws InstructionParseException {
		String[] parts = instruction.split(" ");
		if (parts.length < 1) {
			throw new InstructionParseException("Not enough arguments in internal condition");
		}
		Class<? extends Condition> conditionClass = BetonQuest.getInstance().getConditionClass(parts[0]);
		if (conditionClass == null) {
			// if it's null then there is no such type registered, log an error
			throw new InstructionParseException("Condition type " + parts[0] + " is not registered, check if it's"
					+ " spelled correctly in internal condition");
		}
		try {
			return conditionClass.getConstructor(Instruction.class).newInstance(
					new Instruction(this.instruction.getPackage(), null, instruction));
		} catch (InvocationTargetException e) {
			if (e.getCause() instanceof InstructionParseException) {
				throw new InstructionParseException("Error in internal condition: " + e.getCause().getMessage());
			} else {
				e.printStackTrace();
			}
		} catch (Exception e) {
			e.printStackTrace();
		}
		return null;

	}

	@Override
	public boolean check(String playerID) throws QuestRuntimeException {
		for (Condition condition : internalConditions) {
			if (!condition.check(playerID))
				return false;
		}
		return true;
	}
}