Synnefo

/*

 * Copyright 2007, 2008, 2009 Electronic Business Systems Ltd.

 *

 * This file is part of GSS.

 *

 * GSS is free software: you can redistribute it and/or modify

 * it under the terms of the GNU General Public License as published by

 * the Free Software Foundation, either version 3 of the License, or

 * (at your option) any later version.

 *

 * GSS is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 *

 * You should have received a copy of the GNU General Public License

 * along with GSS.  If not, see <http://www.gnu.org/licenses/>.

 */

package gr.ebs.gss.client;

import gr.ebs.gss.client.MessagePanel.Images;

import gr.ebs.gss.client.rest.DeleteCommand;

import gr.ebs.gss.client.rest.RestException;

import gr.ebs.gss.client.rest.resource.GroupResource;

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.TreeItem;

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

/**

 * The 'delete group' dialog box.

 */

public class DeleteGroupDialog extends DialogBox {

        /**

         * The widget's constructor.

         * @param images the supplied images

         */

        public DeleteGroupDialog(final Images images) {

                // Use this opportunity to set the dialog's caption.

                setText("Delete group");

                setAnimationEnabled(true);

                final GroupResource group = (GroupResource) GSS.get().getCurrentSelection();

                // Create a VerticalPanel to contain the 'about' label and the 'OK'

                // button.

                final VerticalPanel outer = new VerticalPanel();

                final HorizontalPanel buttons = new HorizontalPanel();

                // Create the 'about' text and set a style name so we can style it with

                // CSS.

                final HTML text = new HTML("<table><tr><td>" + AbstractImagePrototype.create(images.warn()).getHTML() + "</td><td>" + "Are you sure you want to delete group '" + group.getName() + "'?</td></tr></table>");

                text.setStyleName("gss-warnMessage");

                outer.add(text);

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

                // when the button is clicked and quits the application.

                final Button ok = new Button("OK", new ClickHandler() {

                        @Override

                        public void onClick(ClickEvent event) {

                                deleteGroup();

                                hide();

                        }

                });

                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.

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

                        @Override

                        public void onClick(ClickEvent event) {

                                hide();

                        }

                });

                buttons.add(cancel);

                buttons.setCellHorizontalAlignment(cancel, HasHorizontalAlignment.ALIGN_CENTER);

                buttons.setSpacing(8);

                buttons.setStyleName("gss-warnMessage");

                outer.setStyleName("gss-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 group.

         *

         * @param userId the ID of the current user

         */

        private void deleteGroup() {

                final TreeItem group = GSS.get().getGroups().getCurrent();

                if (group == null) {

                        GSS.get().displayError("No group was selected!");

                        return;

                }

                DeleteCommand dg = new DeleteCommand(((GroupResource)group.getUserObject()).getUri()){

                        @Override

                        public void onComplete() {

                                GSS.get().getGroups().updateGroups();

                        }

                        @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("Group not found");

                                        else

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

                                }

                                else

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

                        }

                };

                DeferredCommand.addCommand(dg);

        }

        @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();

                                        deleteGroup();

                                        break;

                                case KeyCodes.KEY_ESCAPE:

                                        hide();

                                        break;

                        }

        }

}