CommitPresenter.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.plugin.pullrequest.client.dialogs.commit;

import org.eclipse.che.plugin.pullrequest.client.vcs.VcsServiceProvider;
import com.google.gwt.user.client.rpc.AsyncCallback;
import com.google.inject.Inject;

import org.eclipse.che.ide.api.app.AppContext;
import org.eclipse.che.ide.api.notification.NotificationManager;
import org.eclipse.che.ide.api.resources.Project;

import javax.validation.constraints.NotNull;

import static org.eclipse.che.plugin.pullrequest.client.dialogs.commit.CommitPresenter.CommitActionHandler.CommitAction.CANCEL;
import static org.eclipse.che.plugin.pullrequest.client.dialogs.commit.CommitPresenter.CommitActionHandler.CommitAction.CONTINUE;
import static org.eclipse.che.plugin.pullrequest.client.dialogs.commit.CommitPresenter.CommitActionHandler.CommitAction.OK;
import static org.eclipse.che.ide.api.notification.StatusNotification.DisplayMode.FLOAT_MODE;
import static org.eclipse.che.ide.api.notification.StatusNotification.Status.FAIL;
import static org.eclipse.che.ide.ext.git.client.GitUtil.isUnderGit;

/**
 * This presenter provides base functionality to commit project changes or not before cloning or generating a factory url.
 *
 * @author Kevin Pollet
 */
public class CommitPresenter implements CommitView.ActionDelegate {

    private final CommitView          view;
    private final AppContext          appContext;
    private final VcsServiceProvider  vcsServiceProvider;
    private final NotificationManager notificationManager;
    private       CommitActionHandler handler;

    @Inject
    public CommitPresenter(@NotNull final CommitView view,
                           @NotNull final AppContext appContext,
                           @NotNull final VcsServiceProvider vcsServiceProvider,
                           @NotNull final NotificationManager notificationManager) {
        this.view = view;
        this.appContext = appContext;
        this.vcsServiceProvider = vcsServiceProvider;
        this.notificationManager = notificationManager;

        this.view.setDelegate(this);
    }

    /**
     * Opens the {@link CommitView}.
     *
     * @param commitDescription
     *         the default commit description.
     */
    public void showView(@NotNull String commitDescription) {
        view.show(commitDescription);
    }

    /**
     * Sets the {@link CommitPresenter.CommitActionHandler} called after the ok or
     * continue action is
     * executed.
     *
     * @param handler
     *         the handler to set.
     */
    public void setCommitActionHandler(final CommitActionHandler handler) {
        this.handler = handler;
    }

    /**
     * Returns if the current project has uncommitted changes.
     */
    public void hasUncommittedChanges(final AsyncCallback<Boolean> callback) {
        final Project project = appContext.getRootProject();
        if (project == null) {
            callback.onFailure(new IllegalStateException("No project opened"));

        } else if (!isUnderGit(project)) {
            callback.onFailure(new IllegalStateException("Opened project is not has no Git repository"));

        } else {
            vcsServiceProvider.getVcsService(project).hasUncommittedChanges(project, callback);
        }
    }

    @Override
    public void onOk() {
        final Project project = appContext.getRootProject();
        if (project != null) {
            vcsServiceProvider.getVcsService(project).commit(project, view.isIncludeUntracked(),
                                                      view.getCommitDescription(), new AsyncCallback<Void>() {
                        @Override
                        public void onFailure(final Throwable exception) {
                            notificationManager.notify(exception.getMessage(), FAIL, FLOAT_MODE);
                        }

                        @Override
                        public void onSuccess(final Void result) {
                            view.close();

                            if (handler != null) {
                                handler.onCommitAction(OK);
                            }
                        }
                    });
        }
    }

    @Override
    public void onContinue() {
        view.close();

        if (handler != null) {
            handler.onCommitAction(CONTINUE);
        }
    }

    @Override
    public void onCancel() {
        view.close();

        if (handler != null) {
            handler.onCommitAction(CANCEL);
        }
    }

    @Override
    public void onCommitDescriptionChanged() {
        view.setOkButtonEnabled(!view.getCommitDescription().isEmpty());
    }

    public interface CommitActionHandler {
        /**
         * Called when a commit actions is done on the commit view.
         *
         * @param action
         *         the action.
         */
        void onCommitAction(CommitAction action);

        enum CommitAction {
            OK,
            CONTINUE,
            CANCEL
        }
    }
}