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The JavaFX implementation of the Interacto library

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/*
 * Interacto
 * Copyright (C) 2020 Arnaud Blouin
 * 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 .
 */
package io.github.interacto.jfx.binding;

import io.github.interacto.command.Command;
import io.github.interacto.jfx.command.ProgressableCmd;
import javafx.beans.property.DoubleProperty;
import javafx.beans.property.StringProperty;
import javafx.beans.value.ChangeListener;
import javafx.concurrent.Task;

/**
 * A future task to execute a command async.
 * @author Arnaud Blouin
 */
public class BindingTask extends Task {
	private final Command cmd;
	private final ChangeListener updateProgress;
	private final ChangeListener updateTextProgress;

	public BindingTask(final Command cmd) {
		super();
		this.cmd = cmd;
		updateProgress = (observable, oldValue, newValue) -> updateProgress(newValue.doubleValue(), 100d);
		updateTextProgress = (observable, oldValue, newValue) -> updateMessage(newValue);
	}

	@Override
	protected Boolean call() {
		final DoubleProperty progProp = cmd instanceof ProgressableCmd ? ((ProgressableCmd) cmd).progress() : null;
		final StringProperty textProp = cmd instanceof ProgressableCmd ? ((ProgressableCmd) cmd).textProgress() : null;

		if(progProp != null) {
			progProp.addListener(updateProgress);
		}

		if(textProp != null) {
			textProp.addListener(updateTextProgress);
		}

		final boolean ok = cmd.doIt();

		if(progProp != null) {
			progProp.removeListener(updateProgress);
		}

		if(textProp != null) {
			textProp.removeListener(updateTextProgress);
		}

		return ok;
	}
}