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.HashMap;
  45 import java.util.Iterator;
  46 import java.util.Map;
  47
  48 import com.google.gwt.cell.client.AbstractCell;
  49 import com.google.gwt.cell.client.Cell;
  50 import com.google.gwt.core.client.GWT;
  51 import com.google.gwt.core.client.Scheduler;
  52 import com.google.gwt.core.client.Scheduler.ScheduledCommand;
  53 import com.google.gwt.event.dom.client.ContextMenuEvent;
  54 import com.google.gwt.safehtml.shared.SafeHtml;
  55 import com.google.gwt.safehtml.shared.SafeHtmlBuilder;
  56 import com.google.gwt.user.client.Command;
  57 import com.google.gwt.user.client.ui.AbstractImagePrototype;
  58 import com.google.gwt.view.client.ListDataProvider;
  59 import com.google.gwt.view.client.SingleSelectionModel;
  60 import com.google.gwt.view.client.TreeViewModel;
  61
  62 public class FolderTreeViewModel implements TreeViewModel {
  63
  64         protected Pithos app;
  65
  66     private Cell<Folder> folderCell = new AbstractCell<Folder>(ContextMenuEvent.getType().getName()) {
  67
  68        @Override
  69         public void render(@SuppressWarnings("unused") Context context, Folder folder, SafeHtmlBuilder safeHtmlBuilder) {
  70             String html;
  71             SafeHtml name;
  72                 if (folder.isHome()) {
  73                         html = AbstractImagePrototype.create(FolderTreeView.images.home()).getHTML();
  74                         name = Templates.INSTANCE.nameSpan("Home");
  75                 }
  76                 else if (folder.isTrash()) {
  77                         html = AbstractImagePrototype.create(FolderTreeView.images.trash()).getHTML();
  78                         name = Templates.INSTANCE.nameSpan("Trash");
  79                 }
  80             else {
  81                 html = AbstractImagePrototype.create(FolderTreeView.images.folderYellow()).getHTML();
  82                         name = Templates.INSTANCE.nameSpan(folder.getName());
  83             }
  84             safeHtmlBuilder.appendHtmlConstant(html);
  85             safeHtmlBuilder.append(name);
  86         }
  87
  88         @Override
  89         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) {
  90             if (event.getType().equals(ContextMenuEvent.getType().getName())) {
  91                 FolderTreeViewModel.this.selectionModel.setSelected(folder, true);
  92                 if (!folder.isTrash()) {
  93                     FolderContextMenu menu = new FolderContextMenu(app, FolderTreeView.images, folder);
  94                     menu.setPopupPosition(event.getClientX(), event.getClientY());
  95                     menu.show();
  96                 }
  97             }
  98         }
  99     };
 100
 101     protected ListDataProvider<Folder> rootDataProvider = new ListDataProvider<Folder>();
 102
 103     private Map<Folder, ListDataProvider<Folder>> dataProviderMap = new HashMap<Folder, ListDataProvider<Folder>>();
 104
 105     protected SingleSelectionModel<Folder> selectionModel;
 106
 107     public FolderTreeViewModel(Pithos _app, SingleSelectionModel<Folder> selectionModel) {
 108         app = _app;
 109         this.selectionModel = selectionModel;
 110     }
 111
 112     @Override
 113     public <T> NodeInfo<?> getNodeInfo(T value) {
 114         if (value == null) {
 115             Folder f = new Folder("Loading ...");
 116             rootDataProvider.getList().add(f);
 117             return new DefaultNodeInfo<Folder>(rootDataProvider, folderCell, selectionModel, null);
 118         }
 119                 final Folder f = (Folder) value;
 120                 if (dataProviderMap.get(f) == null) {
 121                     dataProviderMap.put(f, new ListDataProvider<Folder>());
 122                 }
 123                 final ListDataProvider<Folder> dataProvider = dataProviderMap.get(f);
 124                 fetchFolder(f, dataProvider, false);
 125                 return new DefaultNodeInfo<Folder>(dataProvider, folderCell, selectionModel, null);
 126     }
 127
 128     @Override
 129     public boolean isLeaf(Object o) {
 130         if (o instanceof Folder) {
 131             Folder f = (Folder) o;
 132             return f.getSubfolders().isEmpty();
 133         }
 134         return false;
 135     }
 136
 137     protected void fetchFolder(final Iterator<Folder> iter, final Command callback) {
 138         if (iter.hasNext()) {
 139             final Folder f = iter.next();
 140
 141             String path = "/" + f.getContainer() + "?format=json&delimiter=/&prefix=" + f.getPrefix();
 142             GetRequest<Folder> getFolder = new GetRequest<Folder>(Folder.class, app.getApiPath(), app.getUsername(), path, f) {
 143                 @Override
 144                 public void onSuccess(@SuppressWarnings("unused") Folder _result) {
 145                     fetchFolder(iter, callback);
 146                 }
 147
 148                 @Override
 149                 public void onError(Throwable t) {
 150                     GWT.log("Error getting folder", t);
 151                     if (t instanceof RestException)
 152                         app.displayError("Error getting folder: " + ((RestException) t).getHttpStatusText());
 153                     else
 154                         app.displayError("System error fetching folder: " + t.getMessage());
 155                 }
 156             };
 157             getFolder.setHeader("X-Auth-Token", app.getToken());
 158             Scheduler.get().scheduleDeferred(getFolder);
 159         }
 160         else if (callback != null)
 161             callback.execute();
 162     }
 163
 164     public void initialize(final AccountResource account) {
 165         Iterator<Folder> iter = account.getContainers().iterator();
 166         fetchFolder(iter, new Command() {
 167             @Override
 168             public void execute() {
 169                 rootDataProvider.getList().clear();
 170                 rootDataProvider.getList().addAll(account.getContainers());
 171                 selectionModel.setSelected(rootDataProvider.getList().get(0), true);
 172             }
 173         });
 174     }
 175
 176     public Folder getSelection() {
 177         return selectionModel.getSelectedObject();
 178     }
 179
 180     public void updateFolder(Folder folder, boolean showfiles) {
 181         if (dataProviderMap.get(folder) == null) {
 182             dataProviderMap.put(folder, new ListDataProvider<Folder>());
 183         }
 184         final ListDataProvider<Folder> dataProvider = dataProviderMap.get(folder);
 185         if (!folder.isTrash())
 186             fetchFolder(folder, dataProvider, showfiles);
 187         else
 188             app.showFiles(folder);
 189     }
 190
 191     public void fetchFolder(final Folder f, final ListDataProvider<Folder> dataProvider, final boolean showfiles) {
 192         Scheduler.get().scheduleDeferred(new ScheduledCommand() {
 193             @Override
 194             public void execute() {
 195                 String path = "/" + f.getContainer() + "?format=json&delimiter=/&prefix=" + f.getPrefix();
 196                 GetRequest<Folder> getFolder = new GetRequest<Folder>(Folder.class, app.getApiPath(), app.getUsername(), path, f) {
 197                     @Override
 198                     public void onSuccess(final Folder _result) {
 199                         if (showfiles)
 200                             app.showFiles(_result);
 201                         Iterator<Folder> iter = _result.getSubfolders().iterator();
 202                         fetchFolder(iter, new Command() {
 203                             @Override
 204                             public void execute() {
 205                                 dataProvider.getList().clear();
 206                                 dataProvider.getList().addAll(_result.getSubfolders());
 207                                 app.getFolderTreeView().updateChildren(f);
 208                             }
 209                         });
 210                     }
 211
 212                     @Override
 213                     public void onError(Throwable t) {
 214                         GWT.log("Error getting folder", t);
 215                         if (t instanceof RestException)
 216                             app.displayError("Error getting folder: " + ((RestException) t).getHttpStatusText());
 217                         else
 218                             app.displayError("System error fetching folder: " + t.getMessage());
 219                     }
 220                 };
 221                 getFolder.setHeader("X-Auth-Token", app.getToken());
 222                 Scheduler.get().scheduleDeferred(getFolder);
 223             }
 224         });
 225     }
 226 }