GoalPage.java

/*******************************************************************************
 * Copyright (c) 2012-2017 Codenvy, S.A.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *   Codenvy, S.A. - initial API and implementation
 *******************************************************************************/
package org.eclipse.che.ide.command.editor.page.goal;

import com.google.gwt.user.client.ui.IsWidget;
import com.google.inject.Inject;

import org.eclipse.che.ide.api.command.CommandGoal;
import org.eclipse.che.ide.api.command.CommandGoalRegistry;
import org.eclipse.che.ide.api.dialogs.DialogFactory;
import org.eclipse.che.ide.api.dialogs.InputCallback;
import org.eclipse.che.ide.command.editor.EditorMessages;
import org.eclipse.che.ide.command.editor.page.AbstractCommandEditorPage;
import org.eclipse.che.ide.command.editor.page.CommandEditorPage;

import java.util.Optional;
import java.util.Set;

/**
 * {@link CommandEditorPage} which allows to edit command's goal.
 *
 * @author Artem Zatsarynnyi
 */
public class GoalPage extends AbstractCommandEditorPage implements GoalPageView.ActionDelegate {

    private final GoalPageView        view;
    private final CommandGoalRegistry goalRegistry;
    private final EditorMessages      messages;
    private final DialogFactory       dialogFactory;

    /** Initial value of the command's goal. */
    private String initialGoal;

    @Inject
    public GoalPage(GoalPageView view,
                    CommandGoalRegistry goalRegistry,
                    EditorMessages messages,
                    DialogFactory dialogFactory) {
        super(messages.pageGoalTitle());

        this.view = view;
        this.goalRegistry = goalRegistry;
        this.messages = messages;
        this.dialogFactory = dialogFactory;

        view.setDelegate(this);
    }

    @Override
    public IsWidget getView() {
        return view;
    }

    @Override
    protected void initialize() {
        initialGoal = editedCommand.getGoal();

        view.setAvailableGoals(goalRegistry.getAllGoals());
        view.setGoal(initialGoal);
    }

    @Override
    public boolean isDirty() {
        if (editedCommand == null) {
            return false;
        }

        return !(initialGoal.equals(editedCommand.getGoal()));
    }

    @Override
    public void onGoalChanged(String goalId) {
        editedCommand.setGoal(goalId);
        notifyDirtyStateChanged();
    }

    @Override
    public void onCreateGoal() {
        createGoal("");
    }

    /** Asks user for the the new goal name nad creates it if another one with the same name doesn't exists. */
    private void createGoal(String initialName) {
        final InputCallback inputCallback = value -> {
            final String newGoalName = value.trim();

            final Set<CommandGoal> allGoals = goalRegistry.getAllGoals();

            final Optional<CommandGoal> existingGoal = allGoals.stream()
                                                               .filter(goal -> goal.getId().equalsIgnoreCase(newGoalName))
                                                               .findAny();

            if (existingGoal.isPresent()) {
                dialogFactory.createMessageDialog(messages.pageGoalNewGoalTitle(),
                                                  messages.pageGoalNewGoalAlreadyExistsMessage(existingGoal.get().getId()),
                                                  () -> createGoal(newGoalName)).show();
            } else {
                setGoal(newGoalName);
            }
        };

        dialogFactory.createInputDialog(messages.pageGoalNewGoalTitle(),
                                        messages.pageGoalNewGoalLabel(),
                                        initialName,
                                        0,
                                        initialName.length(),
                                        messages.pageGoalNewGoalButtonCreate(),
                                        inputCallback,
                                        null).show();
    }

    /** Set the specified goal name for the currently edited command. */
    private void setGoal(String goalName) {
        editedCommand.setGoal(goalName);

        Set<CommandGoal> allGoals = goalRegistry.getAllGoals();
        allGoals.add(goalRegistry.getGoalForId(goalName));

        view.setAvailableGoals(allGoals);
        view.setGoal(goalName);

        notifyDirtyStateChanged();
    }
}