Synnefo » Pithos

/*

 * Copyright 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.commands;

import gr.ebs.gss.client.FileMenu;

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

import gr.ebs.gss.client.FilePropertiesDialog;

import gr.ebs.gss.client.FilesPropertiesDialog;

import gr.ebs.gss.client.FolderPropertiesDialog;

import gr.ebs.gss.client.GSS;

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

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

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

import gr.ebs.gss.client.rest.MultipleGetCommand.Cached;

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

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

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

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

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

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

import java.util.ArrayList;

import java.util.List;

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

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

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

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

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

/**

 * The command that displays the appropriate Properties dialog, according to the

 * selected object in the application.

 *

 * @author kman

 */

public class PropertiesCommand implements Command {

        final FileMenu.Images newImages;

        private PopupPanel containerPanel;

        private List<GroupResource> groups = null;

        private List<FileResource> versions = null;

        private int tabToShow = 0;

        /**

         * @param _containerPanel

         * @param _newImages the images of all the possible delete dialogs

         * @param _tab the tab to switch to

         */

        public PropertiesCommand(PopupPanel _containerPanel, final FileMenu.Images _newImages, int _tab) {

                containerPanel = _containerPanel;

                newImages = _newImages;

                tabToShow = _tab;

        }

        @Override

        public void execute() {

                containerPanel.hide();

                if (GSS.get().getCurrentSelection() instanceof FolderResource) {

                        GetCommand<FolderResource> eg = new GetCommand<FolderResource>(FolderResource.class, ((FolderResource) GSS.get().getCurrentSelection()).getUri(),((FolderResource) GSS.get().getCurrentSelection())) {

                                @Override

                                public void onComplete() {

                                        GSS.get().setCurrentSelection(getResult());

                                        initialize();

                                }

                                @Override

                                public void onError(Throwable t) {

                                }

                        };

                        DeferredCommand.addCommand(eg);

                }

                else if (GSS.get().getCurrentSelection() instanceof FileResource) {

                        final String path = ((FileResource) GSS.get().getCurrentSelection()).getUri();

                        // Needed because firefox caches head requests.

                        HeadCommand<FileResource> eg = new HeadCommand<FileResource>(FileResource.class, path+"?"+Math.random(), null ) {

                                @Override

                                public void onComplete() {

                                        FileResource res = getResult();

                                        GSS.get().setCurrentSelection(res);

                                        initialize();

                                }

                                @Override

                                public void onError(Throwable t) {

                                        if(t instanceof RestException)

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

                                }

                        };

                        DeferredCommand.addCommand(eg);

                }

                else if (GSS.get().getCurrentSelection() instanceof List) {

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

                        for (FileResource fr : (List<FileResource>) GSS.get().getCurrentSelection())

                                paths.add(fr.getUri()+"?"+Math.random());

                        Cached[] cached = new Cached[paths.size()];

                        int i=0;

                        for (FileResource fr : (List<FileResource>) GSS.get().getCurrentSelection()){

                                Cached c = new Cached();

                                c.uri=fr.getUri()+"?"+Math.random();

                                c.cache=fr;

                                cached[i]=c;

                                i++;

                        }

                        MultipleHeadCommand<FileResource> gv = new MultipleHeadCommand<FileResource>(FileResource.class, paths.toArray(new String[] {}),cached) {

                                @Override

                                public void onComplete() {

                                        List<FileResource> res = getResult();

                                        GSS.get().setCurrentSelection(res);

                                        FilesPropertiesDialog dlg = new FilesPropertiesDialog(res);

                                        dlg.selectTab(tabToShow);

                                        dlg.center();

                                }

                                @Override

                                public void onError(Throwable t) {

                                        GWT.log("", t);

                                        GSS.get().displayError("Unable to fetch files details");

                                }

                                @Override

                                public void onError(String p, Throwable throwable) {

                                        GWT.log("Path:" + p, throwable);

                                }

                        };

                        DeferredCommand.addCommand(gv);

                }

        }

        private void initialize(){

                getGroups();

                getVersions();

                DeferredCommand.addCommand(new IncrementalCommand() {

                        @Override

                        public boolean execute() {

                                boolean res = canContinue();

                                if (res) {

                                        displayProperties(newImages);

                                        return false;

                                }

                                return true;

                        }

                });

        }

        private boolean canContinue() {

                if (groups == null || versions == null)

                        return false;

                return true;

        }

        /**

         * Display the appropriate Properties dialog, according to the selected

         * object in the application.

         *

         * @param propImages the images of all the possible properties dialogs

         */

        void displayProperties(final Images propImages) {

                if (GSS.get().getCurrentSelection() instanceof FolderResource) {

                        FolderPropertiesDialog dlg = new FolderPropertiesDialog(propImages, false, groups);

                        dlg.selectTab(tabToShow);

                        dlg.center();

                } else if (GSS.get().getCurrentSelection() instanceof FileResource) {

                        FilePropertiesDialog dlg = new FilePropertiesDialog(propImages, groups, versions);

                        dlg.selectTab(tabToShow);

                        dlg.center();

                }

        }

        private void getGroups() {

                GetCommand<GroupsResource> gg = new GetCommand<GroupsResource>(GroupsResource.class, GSS.get().getCurrentUserResource().getGroupsPath(), null) {

                        @Override

                        public void onComplete() {

                                GroupsResource res = getResult();

                                MultipleGetCommand<GroupResource> ga = new MultipleGetCommand<GroupResource>(GroupResource.class, res.getGroupPaths().toArray(new String[] {}), null) {

                                        @Override

                                        public void onComplete() {

                                                List<GroupResource> groupList = getResult();

                                                groups = groupList;

                                        }

                                        @Override

                                        public void onError(Throwable t) {

                                                GWT.log("", t);

                                                GSS.get().displayError("Unable to fetch groups");

                                                groups = new ArrayList<GroupResource>();

                                        }

                                        @Override

                                        public void onError(String p, Throwable throwable) {

                                                GWT.log("Path:" + p, throwable);

                                        }

                                };

                                DeferredCommand.addCommand(ga);

                        }

                        @Override

                        public void onError(Throwable t) {

                                GWT.log("", t);

                                GSS.get().displayError("Unable to fetch groups");

                                groups = new ArrayList<GroupResource>();

                        }

                };

                DeferredCommand.addCommand(gg);

        }

        private void getVersions() {

                if (GSS.get().getCurrentSelection() instanceof FileResource) {

                        FileResource afile = (FileResource) GSS.get().getCurrentSelection();

                        GWT.log("File is versioned:" + afile.isVersioned(), null);

                        if (afile.isVersioned()) {

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

                                for (int i = 1; i <= afile.getVersion(); i++)

                                        paths.add(afile.getUri() + "?version=" + i);

                                MultipleHeadCommand<FileResource> gv = new MultipleHeadCommand<FileResource>(FileResource.class, paths.toArray(new String[] {}), null) {

                                        @Override

                                        public void onComplete() {

                                                versions = getResult();

                                        }

                                        @Override

                                        public void onError(Throwable t) {

                                                GWT.log("", t);

                                                GSS.get().displayError("Unable to fetch versions");

                                                versions = new ArrayList<FileResource>();

                                        }

                                        @Override

                                        public void onError(String p, Throwable throwable) {

                                                GWT.log("Path:" + p, throwable);

                                        }

                                };

                                DeferredCommand.addCommand(gv);

                        } else

                                versions = new ArrayList<FileResource>();

                } else

                        versions = new ArrayList<FileResource>();

        }

}