ConsoleRenderer.java

/*******************************************************************************
 * Copyright 2014 Pawel Pastuszak
 * <p>
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * <p>
 * http://www.apache.org/licenses/LICENSE-2.0
 * <p>
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 ******************************************************************************/

package pl.kotcrab.jdialogue.renderer;

import pl.kotcrab.jdialogue.parser.CallbackListener;
import pl.kotcrab.jdialogue.parser.ComponentType;
import pl.kotcrab.jdialogue.parser.DialogueParser;

import java.util.InputMismatchException;
import java.util.Scanner;

/**
 * Simplest 'renderer' posible, uses console for 'rendering' and handling input
 *
 * @author Pawel Pastuszak
 */
public class ConsoleRenderer implements DialogueRenderer {
	private Scanner scanner;
	private DialogueParser parser;

	public ConsoleRenderer (DialogueParser parser) {
		this.parser = parser;
		scanner = new Scanner(System.in);

		parser.addCallbackListener(new CallbackListener() {

			@Override
			public boolean handleCallbackCheck (String callbackText) {
				System.out.print("***Callback Check*** " + callbackText + " DEBUG INPUT: true/false");

				return nextValidBoolean();
			}

			@Override
			public void handleCallback (String callbackText) {
				System.out.println("***Callback*** " + callbackText);
			}
		});
	}

	public void render () {
		ComponentType nextType;
		do {
			nextType = parser.processNextComponent();

			if (nextType == ComponentType.TEXT) {
				print(parser.getCharacterData().getName() + ": ");
				println(parser.getMsg());
				parser.moveToNextComponent();

				continue;
			}

			if (nextType == ComponentType.CHOICE) {
				println("===" + parser.getMsg() + "===");

				String[] choices = parser.getChoiceData();

				for (int i = 0; i < choices.length; i++) {
					println(i + 1 + ". " + choices[i]);
				}

				print("Option: ");
				int chosen = -1;
				do {
					try {
						chosen = scanner.nextInt() - 1;
					} catch (InputMismatchException e) {
						scanner.nextLine();
					}

					if (chosen >= choices.length || chosen < 0) println("Option not found, try again");

				} while (chosen >= choices.length || chosen < 0);

				parser.moveToNextComponent(chosen);
				println("====================");

				continue;
			}

			parser.moveToNextComponent();

		} while (nextType != ComponentType.END);

	}

	private void println (String line) {
		System.out.println(line);
	}

	private void print (String text) {
		System.out.print(text);
	}

	@Override
	public void startSequence (String name) {
		parser.startSequence(name);
	}

	private boolean nextValidBoolean () {
		boolean valid = false;
		boolean response = false;
		do {
			try {
				response = scanner.nextBoolean();
				valid = true;
			} catch (InputMismatchException e) {
				System.out.println("Input valid boolean!");
				scanner.nextLine();
				valid = false;
			}
		} while (valid == false);

		return response;
	}

	public void dispose () {
		scanner.close();
	}
}