code.grnet.gr Git - pithos/blob - web_client/src/gr/grnet/pithos/web/client/foldertree/FolderTreeViewModel.java

   1 /*
   2  * Copyright 2011 GRNET S.A. All rights reserved.
   3  *
   4  * Redistribution and use in source and binary forms, with or
   5  * without modification, are permitted provided that the following
   6  * conditions are met:
   7  *
   8  *   1. Redistributions of source code must retain the above
   9  *      copyright notice, this list of conditions and the following
  10  *      disclaimer.
  11  *
  12  *   2. Redistributions in binary form must reproduce the above
  13  *      copyright notice, this list of conditions and the following
  14  *      disclaimer in the documentation and/or other materials
  15  *      provided with the distribution.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY GRNET S.A. ``AS IS'' AND ANY EXPRESS
  18  * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  19  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  20  * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL GRNET S.A OR
  21  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  22  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  23  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
  24  * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
  25  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  26  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
  27  * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  28  * POSSIBILITY OF SUCH DAMAGE.
  29  *
  30  * The views and conclusions contained in the software and
  31  * documentation are those of the authors and should not be
  32  * interpreted as representing official policies, either expressed
  33  * or implied, of GRNET S.A.
  34  */
  35
  36 package gr.grnet.pithos.web.client.foldertree;
  37
  38 import gr.grnet.pithos.web.client.FolderContextMenu;
  39 import gr.grnet.pithos.web.client.Pithos;
  40 import gr.grnet.pithos.web.client.foldertree.FolderTreeView.Templates;
  41 import gr.grnet.pithos.web.client.rest.GetRequest;
  42 import gr.grnet.pithos.web.client.rest.RestException;
  43
  44 import java.util.ArrayList;
  45 import java.util.HashMap;
  46 import java.util.HashSet;
  47 import java.util.Iterator;
  48 import java.util.Map;
  49
  50 import com.google.gwt.cell.client.AbstractCell;
  51 import com.google.gwt.cell.client.Cell;
  52 import com.google.gwt.core.client.GWT;
  53 import com.google.gwt.core.client.Scheduler;
  54 import com.google.gwt.event.dom.client.ContextMenuEvent;
  55 import com.google.gwt.http.client.Response;
  56 import com.google.gwt.http.client.URL;
  57 import com.google.gwt.safehtml.shared.SafeHtml;
  58 import com.google.gwt.safehtml.shared.SafeHtmlBuilder;
  59 import com.google.gwt.user.client.Command;
  60 import com.google.gwt.user.client.ui.AbstractImagePrototype;
  61 import com.google.gwt.view.client.AsyncDataProvider;
  62 import com.google.gwt.view.client.HasData;
  63 import com.google.gwt.view.client.ListDataProvider;
  64 import com.google.gwt.view.client.SingleSelectionModel;
  65 import com.google.gwt.view.client.TreeViewModel;
  66
  67 public class FolderTreeViewModel implements TreeViewModel {
  68
  69         protected Pithos app;
  70
  71     private Cell<Folder> folderCell = new AbstractCell<Folder>(ContextMenuEvent.getType().getName()) {
  72
  73        @Override
  74         public void render(@SuppressWarnings("unused") Context context, Folder folder, SafeHtmlBuilder safeHtmlBuilder) {
  75             String html;
  76             SafeHtml name;
  77                 if (folder.isHome()) {
  78                         html = AbstractImagePrototype.create(FolderTreeView.images.home()).getHTML();
  79                         name = Templates.INSTANCE.nameSpan("Home");
  80                 }
  81                 else if (folder.isTrash()) {
  82                         html = AbstractImagePrototype.create(FolderTreeView.images.trash()).getHTML();
  83                         name = Templates.INSTANCE.nameSpan("Trash");
  84                 }
  85             else {
  86                 html = AbstractImagePrototype.create(FolderTreeView.images.folderYellow()).getHTML();
  87                         name = Templates.INSTANCE.nameSpan(folder.getName());
  88             }
  89             safeHtmlBuilder.appendHtmlConstant(html);
  90             safeHtmlBuilder.append(name);
  91         }
  92
  93         @Override
  94         public void onBrowserEvent(@SuppressWarnings("unused") Cell.Context context, @SuppressWarnings("unused") com.google.gwt.dom.client.Element parent, Folder folder, com.google.gwt.dom.client.NativeEvent event, @SuppressWarnings("unused") com.google.gwt.cell.client.ValueUpdater<Folder> valueUpdater) {
  95             if (event.getType().equals(ContextMenuEvent.getType().getName())) {
  96                 FolderTreeViewModel.this.selectionModel.setSelected(folder, true);
  97                 FolderContextMenu menu = new FolderContextMenu(app, FolderTreeView.images, app.getSelectedTree(), folder);
  98                 menu.setPopupPosition(event.getClientX(), event.getClientY());
  99                 menu.show();
 100             }
 101         }
 102     };
 103
 104     protected ListDataProvider<Folder> rootDataProvider = new ListDataProvider<Folder>();
 105
 106     private Map<Folder, ListDataProvider<Folder>> dataProviderMap = new HashMap<Folder, ListDataProvider<Folder>>();
 107
 108     protected SingleSelectionModel<Folder> selectionModel;
 109
 110     public FolderTreeViewModel(Pithos _app, SingleSelectionModel<Folder> selectionModel) {
 111         app = _app;
 112         this.selectionModel = selectionModel;
 113     }
 114
 115     @Override
 116     public <T> NodeInfo<?> getNodeInfo(T value) {
 117         if (value == null) {
 118             Folder f = new Folder("Loading ...");
 119             rootDataProvider.getList().add(f);
 120             return new DefaultNodeInfo<Folder>(rootDataProvider, folderCell, selectionModel, null);
 121         }
 122                 final Folder f = (Folder) value;
 123                 if (dataProviderMap.get(f) == null) {
 124                     dataProviderMap.put(f, new ListDataProvider<Folder>());
 125                 }
 126                 final ListDataProvider<Folder> dataProvider = dataProviderMap.get(f);
 127                 dataProvider.getList().clear();
 128                 dataProvider.getList().addAll(f.getSubfolders());
 129                 fetchFolder(f, dataProvider, false, null);
 130                 return new DefaultNodeInfo<Folder>(dataProvider, folderCell, selectionModel, null);
 131     }
 132
 133     @Override
 134     public boolean isLeaf(Object o) {
 135         if (o instanceof Folder) {
 136             Folder f = (Folder) o;
 137             return f.getSubfolders().isEmpty();
 138         }
 139         return false;
 140     }
 141
 142     protected void fetchFolder(final Iterator<Folder> iter, final Command callback) {
 143         if (iter.hasNext()) {
 144             final Folder f = iter.next();
 145
 146             String path = "/" + f.getContainer() + "?format=json&delimiter=/&prefix=" + URL.encodeQueryString(f.getPrefix());
 147             GetRequest<Folder> getFolder = new GetRequest<Folder>(Folder.class, app.getApiPath(), f.getOwner(), path, f) {
 148                 @Override
 149                 public void onSuccess(@SuppressWarnings("unused") Folder _result) {
 150                     fetchFolder(iter, callback);
 151                 }
 152
 153                 @Override
 154                 public void onError(Throwable t) {
 155                     GWT.log("Error getting folder", t);
 156                     if (t instanceof RestException)
 157                         app.displayError("Error getting folder: " + ((RestException) t).getHttpStatusText());
 158                     else
 159                         app.displayError("System error fetching folder: " + t.getMessage());
 160                 }
 161
 162                                 @Override
 163                                 protected void onUnauthorized(Response response) {
 164                                         app.sessionExpired();
 165                                 }
 166             };
 167             getFolder.setHeader("X-Auth-Token", app.getToken());
 168             Scheduler.get().scheduleDeferred(getFolder);
 169         }
 170         else if (callback != null)
 171             callback.execute();
 172     }
 173
 174     public void initialize(final AccountResource account, final Command callback) {
 175         Iterator<Folder> iter = account.getContainers().iterator();
 176         fetchFolder(iter, new Command() {
 177             @Override
 178             public void execute() {
 179                 rootDataProvider.getList().clear();
 180                 rootDataProvider.getList().addAll(account.getContainers());
 181                 selectionModel.setSelected(rootDataProvider.getList().get(0), true);
 182                 if (callback != null)
 183                         callback.execute();
 184             }
 185         });
 186     }
 187
 188     public Folder getSelection() {
 189         return selectionModel.getSelectedObject();
 190     }
 191
 192     public void updateFolder(final Folder folder, boolean showfiles, final Command callback) {
 193         if (dataProviderMap.get(folder) == null) {
 194             dataProviderMap.put(folder, new ListDataProvider<Folder>());
 195         }
 196         final ListDataProvider<Folder> dataProvider = dataProviderMap.get(folder);
 197         fetchFolder(folder, dataProvider, showfiles, new Command() {
 198
 199                         @Override
 200                         public void execute() {
 201                                 app.getFolderTreeView().openFolder(folder);
 202                                 if (callback != null)
 203                                         callback.execute();
 204                         }
 205                 });
 206     }
 207
 208     public void fetchFolder(final Folder f, final ListDataProvider<Folder> dataProvider, final boolean showfiles, final Command callback) {
 209         String path = "/" + f.getContainer() + "?format=json&delimiter=/&prefix=" + URL.encodeQueryString(f.getPrefix());
 210         GetRequest<Folder> getFolder = new GetRequest<Folder>(Folder.class, app.getApiPath(), f.getOwner(), path, f) {
 211             @Override
 212             public void onSuccess(final Folder _result) {
 213                 if (showfiles)
 214                     app.showFiles(_result);
 215                 Iterator<Folder> iter = _result.getSubfolders().iterator();
 216                 fetchFolder(iter, new Command() {
 217                     @Override
 218                     public void execute() {
 219                         dataProvider.getList().clear();
 220                         dataProvider.getList().addAll(_result.getSubfolders());
 221 //                        app.getFolderTreeView().updateChildren(f);
 222                         if (callback != null)
 223                                 callback.execute();
 224                     }
 225                 });
 226             }
 227
 228             @Override
 229             public void onError(Throwable t) {
 230                 GWT.log("Error getting folder", t);
 231                 if (t instanceof RestException)
 232                     app.displayError("Error getting folder: " + ((RestException) t).getHttpStatusText());
 233                 else
 234                     app.displayError("System error fetching folder: " + t.getMessage());
 235             }
 236
 237                         @Override
 238                         protected void onUnauthorized(Response response) {
 239                                 app.sessionExpired();
 240                         }
 241         };
 242         getFolder.setHeader("X-Auth-Token", app.getToken());
 243         Scheduler.get().scheduleDeferred(getFolder);
 244     }
 245 }