Synnefo » Pithos Web Client

/*

 *  Copyright (c) 2011 Greek Research and Technology Network

 */

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.RestException;

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

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

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

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

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 folder' dialog box.

 */

public class DeleteFolderDialog extends DialogBox {

        /**

         * The widget's constructor.

         * @param images the supplied images

         */

        public DeleteFolderDialog(Images images) {

                // Set the dialog's caption.

                setText("Confirmation");

                setAnimationEnabled(true);

                FolderResource folder = ((RestResourceWrapper) GSS.get().getTreeView().getSelection()).getResource();

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

                VerticalPanel outer = new VerticalPanel();

                HorizontalPanel buttons = new HorizontalPanel();

                HTML text = new HTML("<table><tr><td rowspan='2'>" + AbstractImagePrototype.create(images.warn()).getHTML() +

                                        "</td><td>" + "Are you sure you want to <b>permanently</b> delete folder '" + folder.getName() +

                                        "'?</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 folder.

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

                        @Override

                        public void onClick(ClickEvent event) {

                                deleteFolder();

                                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 folder.

         *

         * @param userId the ID of the current user

         */

        private void deleteFolder() {

                RestResource folder = GSS.get().getTreeView().getSelection();

                if (folder == null) {

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

                        return;

                }

                if(!(folder instanceof RestResourceWrapper))

                        return;

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

                        @Override

                        public void onComplete() {

                                FolderResource fres = ((RestResourceWrapper) GSS.get().getTreeView().getSelection()).getResource();

                                if((RestResourceWrapper) GSS.get().getTreeView().getSelection() instanceof TrashFolderResource)

                                        GSS.get().getTreeView().updateTrashNode();

                                else

                                        GSS.get().getTreeView().updateNodeChildrenForRemove(fres.getParentURI());

                                GSS.get().getTreeView().clearSelection();

                                GSS.get().showFileList(true);

                                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("Folder not found");

                                        else

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

                                }

                                else

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

                        }

                };

                DeferredCommand.addCommand(df);

        }

        @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();

                                        deleteFolder();

                                        break;

                                case KeyCodes.KEY_ESCAPE:

                                        hide();

                                        break;

                        }

        }

}