Synnefo » Pithos

/*

 * 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.rest.GetCommand;

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

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

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

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

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

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

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

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

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.ImageBundle;

/**

 * The panel that displays a status bar with quota information.

 */

public class StatusPanel extends Composite {

        public static final boolean DONE = false;

        private HTML fileCountLabel = new HTML("");

        private HTML fileSizeLabel = new HTML("");

        private HTML quotaIcon = new HTML("");

        private HTML quotaLabel = new HTML("");

        private HTML currentlyShowingLabel = new HTML("");

        /**

         * An image bundle for this widget's images.

         */

        public interface Images extends ImageBundle {

                @Resource("gr/ebs/gss/resources/windowlist.png")

                AbstractImagePrototype totalFiles();

                @Resource("gr/ebs/gss/resources/database.png")

                AbstractImagePrototype totalSize();

                @Resource("gr/ebs/gss/resources/redled.png")

                AbstractImagePrototype redSize();

                @Resource("gr/ebs/gss/resources/greenled.png")

                AbstractImagePrototype greenSize();

                @Resource("gr/ebs/gss/resources/yellowled.png")

                AbstractImagePrototype yellowSize();

        }

        private final Images images;

        /**

         * The constructor of the status panel.

         *

         * @param theImages the supplied images

         */

        public StatusPanel(Images theImages) {

                images = theImages;

                HorizontalPanel outer = new HorizontalPanel();

                outer.setWidth("100%");

                outer.setHorizontalAlignment(HasHorizontalAlignment.ALIGN_LEFT);

                HorizontalPanel left = new HorizontalPanel();

                left.setSpacing(8);

                HorizontalPanel right = new HorizontalPanel();

                right.setSpacing(8);

                outer.add(left);

                outer.add(right);

                left.add(new HTML("<b>Totals:</b> "));

                left.add(images.totalFiles().createImage());

                left.add(fileCountLabel);

                left.add(images.totalSize().createImage());

                left.add(fileSizeLabel);

                quotaIcon.setHTML(images.greenSize().getHTML());

                left.add(quotaIcon);

                left.add(quotaLabel);

                right.add(currentlyShowingLabel);

                outer.setStyleName("statusbar-inner");

                left.setStyleName("statusbar-inner");

                right.setStyleName("statusbar-inner");

                outer.setCellHorizontalAlignment(right, HasHorizontalAlignment.ALIGN_RIGHT);

                initWidget(outer);

                // Initialize and display the quota information.

                DeferredCommand.addCommand(new IncrementalCommand() {

                        public boolean execute() {

                                GSS app = GSS.get();

                                UserResource user = app.getCurrentUserResource();

                                if (user == null || app.getFolders().getRootItem() == null)

                                        return !DONE;

                                displayStats(user.getQuota());

                                return DONE;

                        }

                });

        }

        /**

         * Refresh the widget with the provided statistics.

         */

        private void displayStats(QuotaHolder stats) {

                if (stats.getFileCount() == 1)

                        fileCountLabel.setHTML("1 file");

                else

                        fileCountLabel.setHTML(stats.getFileCount() + " files");

                fileSizeLabel.setHTML(stats.getFileSizeAsString() + " used");

                long pc = stats.percentOfFreeSpace();

                if(pc<10) {

                        quotaIcon.setHTML(images.redSize().getHTML());

                        quotaLabel.setHTML(stats.getQuotaLeftAsString() +" free");

                } else if(pc<20) {

                        quotaIcon.setHTML(images.yellowSize().getHTML());

                        quotaLabel.setHTML(stats.getQuotaLeftAsString() +" free");

                } else {

                        quotaIcon.setHTML(images.greenSize().getHTML());

                        quotaLabel.setHTML(stats.getQuotaLeftAsString() +" free");

                }

        }

        /**

         * Requests updated quota information from the server and refreshes

         * the display.

         */

        public void updateStats() {

                final GSS app = GSS.get();

                UserResource user = app.getCurrentUserResource();

                GetCommand<UserResource> uc = new GetCommand<UserResource>(UserResource.class, user.getUri()){

                        @Override

                        public void onComplete() {

                                displayStats(getResult().getQuota());

                        }

                        @Override

                        public void onError(Throwable t) {

                                if(t instanceof RestException)

                                        app.displayError("Unable to fetch quota:" +

                                                                ((RestException)t).getHttpStatusText());

                                else

                                        app.displayError("System error fetching quota:" +

                                                                t.getMessage());

                                GWT.log("ERR", t);

                        }

                };

                DeferredCommand.addCommand(uc);

        }

        /**

         * Displays the statistics for the current folder.

         *

         * @param text the statistics to display

         */

        public void updateCurrentlyShowing(String text) {

                if (text == null)

                        currentlyShowingLabel.setText("");

                else

                        currentlyShowingLabel.setHTML(" <b>Showing:</b> " + text);

        }

}