Synnefo » Pithos Web Client

/*

 * 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;

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

import gr.grnet.pithos.web.client.MessagePanel.Images;

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

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

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

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

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

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

import gr.grnet.pithos.web.client.rest.resource.FileResource;

import java.util.ArrayList;

import java.util.Iterator;

import java.util.List;

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

import com.google.gwt.dom.client.NativeEvent;

import com.google.gwt.event.dom.client.ClickEvent;

import com.google.gwt.event.dom.client.ClickHandler;

import com.google.gwt.event.dom.client.KeyCodes;

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

import com.google.gwt.user.client.Event.NativePreviewEvent;

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

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

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

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

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

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

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

/**

 * The 'delete file' dialog box.

 */

public class DeleteFileDialog extends DialogBox {

    private List<File> files;

        /**

         * The widget's constructor.

         *

         * @param images the supplied images

         */

        public DeleteFileDialog(Images images, List<File> _files) {

        files = _files;

                // Set the dialog's caption.

                setText("Confirmation");

                setAnimationEnabled(true);

                // Create a VerticalPanel to contain the label and the buttons.

                VerticalPanel outer = new VerticalPanel();

                HorizontalPanel buttons = new HorizontalPanel();

                HTML text;

                if (files.size() == 1)

                        text = new HTML("<table><tr><td>" + AbstractImagePrototype.create(images.warn()).getHTML() + "</td><td>" + "Are you sure you want to <b>permanently</b> delete file '" + files.get(0).getName() + "'?</td></tr></table>");

                else

                        text = new HTML("<table><tr><td>" + AbstractImagePrototype.create(images.warn()).getHTML() + "</td><td>" + "Are you sure you want to <b>permanently</b> delete the selected files?</td></tr></table>");

                text.setStyleName("pithos-warnMessage");

                outer.add(text);

                // Create the 'Delete' button, along with a listener that hides the dialog

                // when the button is clicked and deletes the file.

                Button ok = new Button("Delete", new ClickHandler() {

                        @Override

                        public void onClick(ClickEvent event) {

                                deleteFiles();

                                hide();

                        }

                });

                ok.getElement().setId("confirmation.ok");

                buttons.add(ok);

                buttons.setCellHorizontalAlignment(ok, HasHorizontalAlignment.ALIGN_CENTER);

                // Create the 'Cancel' button, along with a listener that hides the

                // dialog when the button is clicked.

                Button cancel = new Button("Cancel", new ClickHandler() {

                        @Override

                        public void onClick(ClickEvent event) {

                                hide();

                        }

                });

                cancel.getElement().setId("confirmation.cancel");

                buttons.add(cancel);

                buttons.setCellHorizontalAlignment(cancel, HasHorizontalAlignment.ALIGN_CENTER);

                buttons.setSpacing(8);

                buttons.setStyleName("pithos-warnMessage");

                outer.setStyleName("pithos-warnMessage");

                outer.add(buttons);

                outer.setCellHorizontalAlignment(text, HasHorizontalAlignment.ALIGN_CENTER);

                outer.setCellHorizontalAlignment(buttons, HasHorizontalAlignment.ALIGN_CENTER);

                setWidget(outer);

        }

        /**

         * Generate an RPC request to delete a file.

         */

        private void deleteFiles() {

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

        deleteFile(iter);

    }

    private void deleteFile(final Iterator<File> iter) {

        if (iter.hasNext()) {

            File f = iter.next();

            String path = GSS.get().getApiPath() + GSS.get().getUsername() + f.getUri();

            DeleteRequest deleteFile = new DeleteRequest(path) {

                @Override

                public void onSuccess(Resource result) {

                    deleteFile(iter);

                }

                @Override

                public void onError(Throwable t) {

                    GWT.log("", t);

                    if (t instanceof RestException) {

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

                    }

                    else

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

                }

            };

            deleteFile.setHeader("X-Auth-Token", GSS.get().getToken());

            Scheduler.get().scheduleDeferred(deleteFile);

        }

        else {

            GSS.get().updateFolder(files.get(0).getParent());

        }

    }

        @Override

        protected void onPreviewNativeEvent(NativePreviewEvent preview) {

                super.onPreviewNativeEvent(preview);

                NativeEvent evt = preview.getNativeEvent();

                if (evt.getType().equals("keydown"))

                        // Use the popup's key preview hooks to close the dialog when either

                        // enter or escape is pressed.

                        switch (evt.getKeyCode()) {

                                case KeyCodes.KEY_ENTER:

                                        hide();

                                        deleteFiles();

                                        break;

                                case KeyCodes.KEY_ESCAPE:

                                        hide();

                                        break;

                        }

        }

}