Synnefo » Pithos

/*

 * Copyright 2011 GRNET S.A. All rights reserved.

 *

 * Redistribution and use in source and binary forms, with or

 * without modification, are permitted provided that the following

 * conditions are met:

 *

 *   1. Redistributions of source code must retain the above

 *      copyright notice, this list of conditions and the following

 *      disclaimer.

 *

 *   2. Redistributions in binary form must reproduce the above

 *      copyright notice, this list of conditions and the following

 *      disclaimer in the documentation and/or other materials

 *      provided with the distribution.

 *

 * THIS SOFTWARE IS PROVIDED BY GRNET S.A. ``AS IS'' AND ANY EXPRESS

 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED

 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR

 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL GRNET S.A OR

 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,

 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT

 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF

 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED

 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT

 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN

 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE

 * POSSIBILITY OF SUCH DAMAGE.

 *

 * The views and conclusions contained in the software and

 * documentation are those of the authors and should not be

 * interpreted as representing official policies, either expressed

 * or implied, of GRNET S.A.

 */

package gr.grnet.pithos.web.client.commands;

import java.util.Iterator;

import java.util.List;

import gr.grnet.pithos.web.client.Pithos;

import gr.grnet.pithos.web.client.foldertree.File;

import gr.grnet.pithos.web.client.foldertree.Folder;

import gr.grnet.pithos.web.client.foldertree.Resource;

import gr.grnet.pithos.web.client.rest.DeleteRequest;

import gr.grnet.pithos.web.client.rest.PutRequest;

import gr.grnet.pithos.web.client.rest.RestException;

import com.google.gwt.core.client.GWT;

import com.google.gwt.core.client.Scheduler;

import com.google.gwt.http.client.Response;

import com.google.gwt.user.client.Command;

import com.google.gwt.user.client.ui.PopupPanel;

/**

 *

 * Restore trashed files and folders.

 *

 */

public class RestoreTrashCommand implements Command {

        private PopupPanel containerPanel;

        protected Pithos app;

        protected Object resource;

        public RestoreTrashCommand(Pithos _app, PopupPanel _containerPanel, Object _resource){

                containerPanel = _containerPanel;

        app = _app;

        resource = _resource;

        }

        @Override

        public void execute() {

        if (containerPanel != null)

                    containerPanel.hide();

        if (resource instanceof List) {

            @SuppressWarnings("unchecked")

                        Iterator<File> iter = ((List<File>) resource).iterator();

            untrashFiles(iter, new Command() {

                @SuppressWarnings("unchecked")

                                @Override

                public void execute() {

                    app.updateFolder(((List<File>) resource).get(0).getParent(), true, null);

                }

            });

        }

        else if (resource instanceof Folder) {

            final Folder toBeUnTrashed = (Folder) resource;

            untrashFolder(toBeUnTrashed, new Command() {

                @Override

                public void execute() {

                    app.updateFolder(toBeUnTrashed.getParent(), true, null);

                }

            });

        }

        }

    private void untrashFolder(final Folder f, final Command callback) {

        String path = "/" + Pithos.HOME_CONTAINER + "/" + f.getPrefix();

        PutRequest createFolder = new PutRequest(app.getApiPath(), app.getUsername(), path) {

            @Override

            public void onSuccess(@SuppressWarnings("unused") Resource result) {

                Iterator<File> iter = f.getFiles().iterator();

                untrashFiles(iter, new Command() {

                    @Override

                    public void execute() {

                        Iterator<Folder> iterf = f.getSubfolders().iterator();

                        untrashSubfolders(iterf, new Command() {

                                                        @Override

                                                        public void execute() {

                                                                DeleteRequest deleteFolder = new DeleteRequest(app.getApiPath(), f.getOwner(), f.getUri()) {

                                                                        @Override

                                                                        public void onSuccess(@SuppressWarnings("unused") Resource _result) {

                                                                                if (callback != null)

                                                                                        callback.execute();

                                                                        }

                                                                        @Override

                                                                        public void onError(Throwable t) {

                                                            GWT.log("", t);

                                                            if (t instanceof RestException) {

                                                                app.displayError("Unable to delete folder: " + ((RestException) t).getHttpStatusText());

                                                            }

                                                            else

                                                                app.displayError("System error unable to delete folder: "+t.getMessage());

                                                                        }

                                                                        @Override

                                                                        protected void onUnauthorized(Response response) {

                                                                                app.sessionExpired();

                                                                        }

                                                                };

                                                                deleteFolder.setHeader("X-Auth-Token", app.getToken());

                                                                Scheduler.get().scheduleDeferred(deleteFolder);

                                                        }

                                                });

                    }

                });

            }

            @Override

            public void onError(Throwable t) {

                GWT.log("", t);

                if (t instanceof RestException) {

                    app.displayError("Unable to create folder:" + ((RestException) t).getHttpStatusText());

                }

                else

                    app.displayError("System error creating folder:" + t.getMessage());

            }

                        @Override

                        protected void onUnauthorized(Response response) {

                                app.sessionExpired();

                        }

        };

        createFolder.setHeader("X-Auth-Token", app.getToken());

        createFolder.setHeader("Accept", "*/*");

        createFolder.setHeader("Content-Length", "0");

        createFolder.setHeader("Content-Type", "application/folder");

        Scheduler.get().scheduleDeferred(createFolder);

    }

    protected void untrashFiles(final Iterator<File> iter, final Command callback) {

        if (iter.hasNext()) {

            File file = iter.next();

            String path = "/" + Pithos.HOME_CONTAINER + "/" + file.getPath();

            PutRequest untrashFile = new PutRequest(app.getApiPath(), app.getUsername(), path) {

                @Override

                public void onSuccess(@SuppressWarnings("unused") Resource result) {

                    untrashFiles(iter, callback);

                }

                @Override

                public void onError(Throwable t) {

                    GWT.log("", t);

                    if (t instanceof RestException) {

                        app.displayError("Unable to copy file: " + ((RestException) t).getHttpStatusText());

                    }

                    else

                        app.displayError("System error unable to copy file: "+t.getMessage());

                }

                                @Override

                                protected void onUnauthorized(Response response) {

                                        app.sessionExpired();

                                }

            };

            untrashFile.setHeader("X-Auth-Token", app.getToken());

            untrashFile.setHeader("X-Move-From", file.getUri());

            Scheduler.get().scheduleDeferred(untrashFile);

        }

        else if (callback != null) {

            callback.execute();

        }

    }

    protected void untrashSubfolders(final Iterator<Folder> iter, final Command callback) {

        if (iter.hasNext()) {

            final Folder f = iter.next();

            untrashFolder(f, callback);

        }

        else  {

                if (callback != null)

                        callback.execute();

        }

    }

}