ProjectTreeStateNotificationOperation.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.api.event.ng;


import org.eclipse.che.api.core.jsonrpc.commons.JsonRpcException;
import org.eclipse.che.api.core.jsonrpc.commons.RequestHandlerConfigurator;
import org.eclipse.che.api.project.shared.dto.event.FileWatcherEventType;
import org.eclipse.che.api.project.shared.dto.event.ProjectTreeStateUpdateDto;
import org.eclipse.che.ide.api.app.AppContext;
import org.eclipse.che.ide.api.resources.Container;
import org.eclipse.che.ide.api.resources.ExternalResourceDelta;
import org.eclipse.che.ide.resource.Path;
import org.eclipse.che.ide.util.loging.Log;

import javax.inject.Inject;
import javax.inject.Singleton;

import java.util.function.BiConsumer;

import static org.eclipse.che.ide.api.resources.ResourceDelta.ADDED;
import static org.eclipse.che.ide.api.resources.ResourceDelta.REMOVED;
import static org.eclipse.che.ide.api.resources.ResourceDelta.UPDATED;

/**
 * Receives project tree status notifications from server side. There are three type of notifications
 * for files and directories in a project tree: creation, removal, modification. Each notification is
 * processed and passed further to an instance of workspace {@link Container}.
 *
 * @author Dmitry Kuleshov
 */
@Singleton
public class ProjectTreeStateNotificationOperation implements BiConsumer<String, ProjectTreeStateUpdateDto> {
    private final AppContext appContext;

    @Inject
    public ProjectTreeStateNotificationOperation(AppContext appContext) {
        this.appContext = appContext;
    }

    @Inject
    public void configureHandler(RequestHandlerConfigurator configurator) {
        configurator.newConfiguration()
                    .methodName("event:project-tree-state-changed")
                    .paramsAsDto(ProjectTreeStateUpdateDto.class)
                    .noResult()
                    .withConsumer(this);
    }

    @Override
    public void accept(String endpointId, ProjectTreeStateUpdateDto params) throws JsonRpcException {
        final String path = params.getPath();
        final FileWatcherEventType type = params.getType();

        final int status;

        switch (type) {
            case CREATED: {
                status = ADDED;

                break;
            }
            case DELETED: {
                status = REMOVED;

                break;
            }
            case MODIFIED: {
                status = UPDATED;

                break;
            }
            default: {
                status = UPDATED;

                break;
            }
        }

        Log.debug(getClass(), "Received request\npath: " + path + "\ntype:" + type + "\nstatus:" + status);

        if (path == null || path.isEmpty()) {
            appContext.getWorkspaceRoot().synchronize();
        } else {
            appContext.getWorkspaceRoot().synchronize(new ExternalResourceDelta(Path.valueOf(path), Path.valueOf(path), status));
        }
    }
}