BranchListPresenter.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.ext.git.client.compare.branchList;

import com.google.common.base.Optional;
import com.google.inject.Inject;
import com.google.inject.Singleton;

import org.eclipse.che.api.git.shared.Branch;
import org.eclipse.che.api.promises.client.Operation;
import org.eclipse.che.api.promises.client.OperationException;
import org.eclipse.che.api.promises.client.PromiseError;
import org.eclipse.che.ide.api.app.AppContext;
import org.eclipse.che.ide.api.dialogs.DialogFactory;
import org.eclipse.che.ide.api.git.GitServiceClient;
import org.eclipse.che.ide.api.notification.NotificationManager;
import org.eclipse.che.ide.api.resources.File;
import org.eclipse.che.ide.api.resources.Project;
import org.eclipse.che.ide.api.resources.Resource;
import org.eclipse.che.ide.ext.git.client.GitLocalizationConstant;
import org.eclipse.che.ide.ext.git.client.compare.ComparePresenter;
import org.eclipse.che.ide.ext.git.client.compare.FileStatus.Status;
import org.eclipse.che.ide.ext.git.client.compare.changedList.ChangedListPresenter;
import org.eclipse.che.ide.ext.git.client.outputconsole.GitOutputConsole;
import org.eclipse.che.ide.ext.git.client.outputconsole.GitOutputConsoleFactory;
import org.eclipse.che.ide.processes.panel.ProcessesPanelPresenter;

import javax.validation.constraints.NotNull;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import static com.google.common.base.Preconditions.checkState;
import static java.util.Collections.singletonList;
import static org.eclipse.che.api.git.shared.BranchListMode.LIST_ALL;
import static org.eclipse.che.api.git.shared.DiffType.NAME_STATUS;
import static org.eclipse.che.ide.api.notification.StatusNotification.DisplayMode.NOT_EMERGE_MODE;
import static org.eclipse.che.ide.api.notification.StatusNotification.Status.FAIL;
import static org.eclipse.che.ide.ext.git.client.compare.FileStatus.defineStatus;

/**
 * Presenter for displaying list of branches for comparing selected with local changes.
 *
 * @author Igor Vinokur
 */
@Singleton
public class BranchListPresenter implements BranchListView.ActionDelegate {
    public static final String BRANCH_LIST_COMMAND_NAME = "Git list of branches";

    private final ComparePresenter        comparePresenter;
    private final ChangedListPresenter    changedListPresenter;
    private final GitOutputConsoleFactory gitOutputConsoleFactory;
    private final ProcessesPanelPresenter consolesPanelPresenter;
    private final BranchListView          view;
    private final DialogFactory           dialogFactory;
    private final GitServiceClient        service;
    private final GitLocalizationConstant locale;
    private final AppContext              appContext;
    private final NotificationManager     notificationManager;

    private Branch   selectedBranch;
    private Project  project;
    private Resource selectedItem;

    @Inject
    public BranchListPresenter(BranchListView view,
                               ComparePresenter comparePresenter,
                               ChangedListPresenter changedListPresenter,
                               GitServiceClient service,
                               GitLocalizationConstant locale,
                               AppContext appContext,
                               NotificationManager notificationManager,
                               DialogFactory dialogFactory,
                               GitOutputConsoleFactory gitOutputConsoleFactory,
                               ProcessesPanelPresenter processesPanelPresenter) {
        this.view = view;
        this.comparePresenter = comparePresenter;
        this.changedListPresenter = changedListPresenter;
        this.dialogFactory = dialogFactory;
        this.service = service;
        this.locale = locale;
        this.appContext = appContext;
        this.notificationManager = notificationManager;
        this.gitOutputConsoleFactory = gitOutputConsoleFactory;
        this.consolesPanelPresenter = processesPanelPresenter;

        this.view.setDelegate(this);
    }

    /** Open dialog and shows branches to compare. */
    public void showBranches(Project project, Resource selectedItem) {
        checkState(project.getLocation().isPrefixOf(selectedItem.getLocation()), "Given selected item is not descendant of given project");

        this.project = project;
        this.selectedItem = selectedItem;

        getBranches();
    }

    /** {@inheritDoc} */
    @Override
    public void onCloseClicked() {
        view.close();
    }

    /** {@inheritDoc} */
    @Override
    public void onCompareClicked() {

        final String selectedItemPath = selectedItem.getLocation()
                                                    .removeFirstSegments(project.getLocation().segmentCount())
                                                    .removeTrailingSeparator()
                                                    .toString();

        service.diff(appContext.getDevMachine(),
                     project.getLocation(),
                     selectedItemPath.isEmpty() ? null : singletonList(selectedItemPath),
                     NAME_STATUS,
                     false,
                     0,
                     selectedBranch.getName(),
                     false)
               .then(new Operation<String>() {
                   @Override
                   public void apply(String diff) throws OperationException {
                       if (diff.isEmpty()) {
                           dialogFactory.createMessageDialog(locale.compareMessageIdenticalContentTitle(),
                                                             locale.compareMessageIdenticalContentText(), null).show();
                       } else {
                           final String[] changedFiles = diff.split("\n");
                           if (changedFiles.length == 1) {
                               project.getFile(changedFiles[0].substring(2)).then(new Operation<Optional<File>>() {
                                   @Override
                                   public void apply(Optional<File> file) throws OperationException {
                                       if (file.isPresent()) {
                                           comparePresenter.showCompareWithLatest(file.get(),
                                                                                  defineStatus(changedFiles[0].substring(0, 1)),
                                                                                  selectedBranch.getName());
                                       }
                                   }
                               });
                           } else {
                               Map<String, Status> items = new HashMap<>();
                               for (String item : changedFiles) {
                                   items.put(item.substring(2, item.length()), defineStatus(item.substring(0, 1)));
                               }
                               changedListPresenter.show(items, selectedBranch.getName(), null, project);
                           }
                       }
                   }
               })
               .catchError(new Operation<PromiseError>() {
                   @Override
                   public void apply(PromiseError error) throws OperationException {
                       notificationManager.notify(locale.diffFailed(), FAIL, NOT_EMERGE_MODE);
                   }
               });

        view.close();
    }

    /** {@inheritDoc} */
    @Override
    public void onBranchUnselected() {
        selectedBranch = null;
        view.setEnableCompareButton(false);
    }

    /** {@inheritDoc} */
    @Override
    public void onBranchSelected(@NotNull Branch branch) {
        selectedBranch = branch;

        view.setEnableCompareButton(true);
    }

    /** Get list of branches from selected project. */
    private void getBranches() {
        service.branchList(appContext.getDevMachine(), project.getLocation(), LIST_ALL).then(new Operation<List<Branch>>() {
            @Override
            public void apply(List<Branch> branches) throws OperationException {
                view.setBranches(branches);
                view.showDialog();
            }
        }).catchError(new Operation<PromiseError>() {
            @Override
            public void apply(PromiseError error) throws OperationException {
                final String errorMessage = (error.getMessage() != null) ? error.getMessage() : locale.branchesListFailed();
                GitOutputConsole console = gitOutputConsoleFactory.create(BRANCH_LIST_COMMAND_NAME);
                console.printError(errorMessage);
                consolesPanelPresenter.addCommandOutput(appContext.getDevMachine().getId(), console);
                notificationManager.notify(locale.branchesListFailed(), FAIL, NOT_EMERGE_MODE);
            }
        });
    }
}