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

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

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.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 {

        /**

         * The widget's constructor.

         *

         * @param images the supplied images

         */

        public DeleteFileDialog(Images images) {

                // Set the dialog's caption.

                setText("Confirmation");

                setAnimationEnabled(true);

                Object selection = GSS.get().getCurrentSelection();

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

                VerticalPanel outer = new VerticalPanel();

                HorizontalPanel buttons = new HorizontalPanel();

                HTML text;

                if (selection instanceof FileResource)

                        text = new HTML("<table><tr><td>" + AbstractImagePrototype.create(images.warn()).getHTML() + "</td><td>" + "Are you sure you want to <b>permanently</b> delete file '" + ((FileResource) selection).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) {

                                deleteFile();

                                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.

         *

         * @param userId the ID of the current user

         */

        private void deleteFile() {

                Object selection = GSS.get().getCurrentSelection();

                if (selection == null) {

                        GSS.get().displayError("No file was selected");

                        return;

                }

                if (selection instanceof FileResource) {

                        FileResource file = (FileResource) selection;

                        DeleteCommand df = new DeleteCommand(file.getUri()){

                                @Override

                                public void onComplete() {

                                        GSS.get().getTreeView().updateNode(GSS.get().getTreeView().getSelection());

                                        GSS.get().getStatusPanel().updateStats();

                                }

                                @Override

                                public void onError(Throwable t) {

                                        GWT.log("", t);

                                        if(t instanceof RestException){

                                                int statusCode = ((RestException)t).getHttpStatusCode();

                                                if(statusCode == 405)

                                                        GSS.get().displayError("You don't have the necessary permissions");

                                                else if(statusCode == 404)

                                                        GSS.get().displayError("File not found");

                                                else

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

                                        }

                                        else

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

                                }

                        };

                        DeferredCommand.addCommand(df);

                }

                else if(selection instanceof List){

                        List<FileResource> files = (List<FileResource>) selection;

                        List<String> fileIds = new ArrayList<String>();

                        for(FileResource f : files)

                                fileIds.add(f.getUri());

                        MultipleDeleteCommand ed = new MultipleDeleteCommand(fileIds.toArray(new String[0])){

                                @Override

                                public void onComplete() {

                                        GSS.get().getTreeView().updateNode(GSS.get().getTreeView().getSelection());

                                }

                                @Override

                                public void onError(Throwable t) {

                                        GWT.log("", t);

                                        GSS.get().getTreeView().updateNode(GSS.get().getTreeView().getSelection());

                                }

                                @Override

                                public void onError(String path, Throwable t) {

                                        GWT.log("", t);

                                        if(t instanceof RestException){

                                                int statusCode = ((RestException)t).getHttpStatusCode();

                                                if(statusCode == 405)

                                                        GSS.get().displayError("You don't have the necessary permissions");

                                                else if(statusCode == 404)

                                                        GSS.get().displayError("File not found");

                                                else

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

                                        }

                                        else

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

                                }

                        };

                        DeferredCommand.addCommand(ed);

                }

        }

        @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();

                                        deleteFile();

                                        break;

                                case KeyCodes.KEY_ESCAPE:

                                        hide();

                                        break;

                        }

        }

}