code.grnet.gr Git - pithos-web-client/blob - 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.Iterator;
  47 import java.util.Map;
  48
  49 import com.google.gwt.cell.client.AbstractCell;
  50 import com.google.gwt.cell.client.Cell;
  51 import com.google.gwt.core.client.GWT;
  52 import com.google.gwt.core.client.Scheduler;
  53 import com.google.gwt.event.dom.client.ContextMenuEvent;
  54 import com.google.gwt.http.client.Response;
  55 import com.google.gwt.http.client.URL;
  56 import com.google.gwt.safehtml.shared.SafeHtml;
  57 import com.google.gwt.safehtml.shared.SafeHtmlBuilder;
  58 import com.google.gwt.user.client.Command;
  59 import com.google.gwt.user.client.ui.AbstractImagePrototype;
  60 import com.google.gwt.view.client.ListDataProvider;
  61 import com.google.gwt.view.client.SingleSelectionModel;
  62 import com.google.gwt.view.client.TreeViewModel;
  63
  64 public class FolderTreeViewModel implements TreeViewModel {
  65
  66         protected Pithos app;
  67
  68     private Cell<Folder> folderCell = new AbstractCell<Folder>(ContextMenuEvent.getType().getName()) {
  69
  70        @Override
  71         public void render(Context context, Folder folder, SafeHtmlBuilder safeHtmlBuilder) {
  72             String html;
  73             SafeHtml name;
  74                 if (folder.isHome()) {
  75                         html = AbstractImagePrototype.create(FolderTreeView.images.home()).getHTML();
  76                         name = Templates.INSTANCE.nameSpan("Pithos");
  77                 }
  78                 else if (folder.isTrash()) {
  79                         html = AbstractImagePrototype.create(FolderTreeView.images.trash()).getHTML();
  80                         name = Templates.INSTANCE.nameSpan("Trash");
  81                 }
  82             else {
  83                 html = AbstractImagePrototype.create(folder.isShared() ? FolderTreeView.images.myShared() : FolderTreeView.images.folderYellow()).getHTML();
  84                         name = Templates.INSTANCE.nameSpan(folder.getName());
  85             }
  86             safeHtmlBuilder.appendHtmlConstant(html).appendHtmlConstant("&nbsp;");
  87             safeHtmlBuilder.append(name);
  88         }
  89
  90         @Override
  91         public void onBrowserEvent(Cell.Context context, com.google.gwt.dom.client.Element parent, Folder folder, com.google.gwt.dom.client.NativeEvent event, com.google.gwt.cell.client.ValueUpdater<Folder> valueUpdater) {
  92             if (event.getType().equals(ContextMenuEvent.getType().getName())) {
  93                 FolderTreeViewModel.this.selectionModel.setSelected(folder, true);
  94                 FolderContextMenu menu = new FolderContextMenu(app, FolderTreeView.images, app.getSelectedTree(), folder);
  95                 menu.setPopupPosition(event.getClientX(), event.getClientY());
  96                 menu.show();
  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                 //This prevents the loading indicator
 125 //              dataProvider.getList().clear();
 126 //              dataProvider.getList().addAll(f.getSubfolders());
 127                 fetchFolder(f, dataProvider, false, null);
 128                 return new DefaultNodeInfo<Folder>(dataProvider, folderCell, selectionModel, null);
 129     }
 130
 131     @Override
 132     public boolean isLeaf(Object o) {
 133         if (o instanceof Folder) {
 134             Folder f = (Folder) o;
 135             return f.getSubfolders().isEmpty();
 136         }
 137         return false;
 138     }
 139
 140         private native void log(String msg) /*-{
 141         $wnd.console.log(msg);
 142         }-*/;
 143
 144     protected void fetchFolder(final Iterator<Folder> iter, final Command callback) {
 145         if (iter.hasNext()) {
 146             final Folder f = iter.next();
 147
 148             String path = "/" + f.getContainer() + "?format=json&delimiter=/&prefix=" + URL.encodeQueryString(f.getPrefix());
 149             GetRequest<Folder> getFolder = new GetRequest<Folder>(Folder.class, app.getApiPath(), f.getOwner(), path, f) {
 150                 @Override
 151                 public void onSuccess(Folder _result) {
 152                     fetchFolder(iter, callback);
 153                 }
 154
 155                 @Override
 156                 public void onError(Throwable t) {
 157                     GWT.log("Error getting folder", t);
 158                                         app.setError(t);
 159                     if (t instanceof RestException)
 160                         app.displayError("Error getting folder: " + ((RestException) t).getHttpStatusText());
 161                     else
 162                         app.displayError("System error fetching folder: " + t.getMessage());
 163                 }
 164
 165                                 @Override
 166                                 protected void onUnauthorized(Response response) {
 167                                         app.sessionExpired();
 168                                 }
 169             };
 170             getFolder.setHeader("X-Auth-Token", app.getToken());
 171             Scheduler.get().scheduleDeferred(getFolder);
 172         }
 173         else if (callback != null)
 174             callback.execute();
 175     }
 176
 177     public void initialize(final AccountResource account, final Command callback) {
 178         Iterator<Folder> iter = account.getContainers().listIterator();
 179         fetchFolder(iter, new Command() {
 180             @Override
 181             public void execute() {
 182                 rootDataProvider.getList().clear();
 183                 Folder t = null;
 184                 for (Folder c : account.getContainers()) {
 185                         if (c.isHome())
 186                         rootDataProvider.getList().add(0, c); //Pithos is always first
 187                         else if (c.isTrash())
 188                                 t = c; //Keep trash for adding in the end
 189                         else
 190                                 rootDataProvider.getList().add(c);
 191                 }
 192                 if (t != null)
 193                         rootDataProvider.getList().add(t);
 194                 selectionModel.setSelected(rootDataProvider.getList().get(0), true);
 195                 if (callback != null)
 196                         callback.execute();
 197             }
 198         });
 199     }
 200
 201     public Folder getSelection() {
 202         return selectionModel.getSelectedObject();
 203     }
 204
 205     public void updateFolder(final Folder folder, boolean showfiles, final Command callback) {
 206         if (dataProviderMap.get(folder) == null) {
 207             dataProviderMap.put(folder, new ListDataProvider<Folder>());
 208         }
 209         final ListDataProvider<Folder> dataProvider = dataProviderMap.get(folder);
 210         fetchFolder(folder, dataProvider, showfiles, new Command() {
 211
 212                         @Override
 213                         public void execute() {
 214                                 app.getFolderTreeView().openFolder(folder);
 215                                 if (callback != null)
 216                                         callback.execute();
 217                         }
 218                 });
 219     }
 220
 221     public void fetchFolder(final Folder f, final ListDataProvider<Folder> dataProvider, final boolean showfiles, final Command callback) {
 222         String path = "/" + f.getContainer() + "?format=json&delimiter=/&prefix=" + URL.encodeQueryString(f.getPrefix());
 223         GetRequest<Folder> getFolder = new GetRequest<Folder>(Folder.class, app.getApiPath(), f.getOwner(), path, f) {
 224             @Override
 225             public void onSuccess(final Folder _result) {
 226                 if (showfiles)
 227                     app.showFiles(_result);
 228                 Iterator<Folder> iter = new ArrayList<Folder>(_result.getSubfolders()).listIterator();
 229                 fetchFolder(iter, new Command() {
 230                     @Override
 231                     public void execute() {
 232                         dataProvider.getList().clear();
 233                         dataProvider.getList().addAll(_result.getSubfolders());
 234 //                        app.getFolderTreeView().updateChildren(f);
 235                         if (callback != null)
 236                                 callback.execute();
 237                     }
 238                 });
 239             }
 240
 241             @Override
 242             public void onError(Throwable t) {
 243                 GWT.log("Error getting folder", t);
 244                                 app.setError(t);
 245                 if (t instanceof RestException)
 246                     app.displayError("Error getting folder: " + ((RestException) t).getHttpStatusText());
 247                 else
 248                     app.displayError("System error fetching folder: " + t.getMessage());
 249             }
 250
 251                         @Override
 252                         protected void onUnauthorized(Response response) {
 253                                 app.sessionExpired();
 254                         }
 255         };
 256         getFolder.setHeader("X-Auth-Token", app.getToken());
 257         Scheduler.get().scheduleDeferred(getFolder);
 258     }
 259 }