Synnefo

/*

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

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

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

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.PutRequest;

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

import java.util.Iterator;

import java.util.List;

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

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

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

public class PasteCommand implements Command {

    private GSS app;

        private PopupPanel containerPanel;

    private Folder folder;

        public PasteCommand(GSS _app, PopupPanel _containerPanel, Folder _folder) {

        app = _app;

                containerPanel = _containerPanel;

        folder = _folder;

        }

        @Override

        public void execute() {

        if (containerPanel != null)

                    containerPanel.hide();

        Object clipboardItem = app.getClipboard().getItem();

        if (clipboardItem == null)

            return;

        int operation = app.getClipboard().getOperation();

        if (clipboardItem instanceof Folder) {

            final Folder tobeCopied = (Folder) clipboardItem;

            if (operation == Clipboard.COPY) {

                copyFolder(tobeCopied, folder.getUri(), new Command() {

                    @Override

                    public void execute() {

                        app.getClipboard().clear();

                        app.updateFolder(folder);

                    }

                });

            }

            else {

                copyFolder(tobeCopied, folder.getUri(), new Command() {

                    @Override

                    public void execute() {

                        app.getClipboard().clear();

                        app.deleteFolder(tobeCopied);

                        app.updateFolder(folder);

                    }

                });

            }

        }

        else {

            List<File> tobeCopied = (List<File>) clipboardItem;

            Iterator<File> iter = tobeCopied.iterator();

            if (operation == Clipboard.COPY) {

                copyFiles(iter, folder.getUri(), new Command() {

                    @Override

                    public void execute() {

                        app.getClipboard().clear();

                        app.updateFolder(folder);

                    }

                });

            }

            else {

                moveFiles(iter, new Command() {

                    @Override

                    public void execute() {

                        app.getClipboard().clear();

                        app.updateFolder(folder);

                    }

                });

            }

        }

        }

    private void moveFiles(final Iterator<File> iter, final Command callback) {

        if (iter.hasNext()) {

            File file = iter.next();

            String path = app.getApiPath() + app.getUsername() + folder.getUri() + "/" + file.getName();

            PutRequest copyFile = new PutRequest(path) {

                @Override

                public void onSuccess(Resource result) {

                    moveFiles(iter, callback);

                }

                @Override

                public void onError(Throwable t) {

                    GWT.log("", t);

                    if (t instanceof RestException) {

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

                    }

                    else

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

                }

            };

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

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

            Scheduler.get().scheduleDeferred(copyFile);

        }

        else if (callback != null) {

            callback.execute();

        }

    }

    private void copyFiles(final Iterator<File> iter, final String targetUri, final Command callback) {

        if (iter.hasNext()) {

            File file = iter.next();

            String path = app.getApiPath() + app.getUsername() + targetUri + "/" + file.getName();

            PutRequest copyFile = new PutRequest(path) {

                @Override

                public void onSuccess(Resource result) {

                    copyFiles(iter, targetUri, callback);

                }

                @Override

                public void onError(Throwable t) {

                    GWT.log("", t);

                    if (t instanceof RestException) {

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

                    }

                    else

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

                }

            };

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

            copyFile.setHeader("X-Copy-From", file.getUri());

            Scheduler.get().scheduleDeferred(copyFile);

        }

        else  if (callback != null) {

            callback.execute();

        }

    }

    private void copyFolder(final Folder f, final String targetUri, final Command callback) {

        String path = app.getApiPath() + app.getUsername() + targetUri + "/" + f.getName();

        PutRequest createFolder = new PutRequest(path) {

            @Override

            public void onSuccess(Resource result) {

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

                copyFiles(iter, targetUri + "/" + f.getName(), new Command() {

                    @Override

                    public void execute() {

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

                        copySubfolders(iterf, targetUri + "/" + f.getName(), new Command() {

                            @Override

                            public void execute() {

                                callback.execute();

                            }

                        });

                    }

                });

            }

            @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());

            }

        };

        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);

    }

    private void copySubfolders(final Iterator<Folder> iter, final String targetUri, final Command callback) {

        if (iter.hasNext()) {

            final Folder f = iter.next();

            copyFolder(f, targetUri, callback);

        }

        else  if (callback != null) {

            callback.execute();

        }

    }

}