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

   1 /*
   2  * Copyright 2011-2012 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.folderYellow()).getHTML();
  76                         name = Templates.INSTANCE.nameSpan(folder.getName());
  77                 }
  78                 else if (folder.isTrash()) {
  79                         html = AbstractImagePrototype.create(FolderTreeView.images.trash()).getHTML();
  80                         name = Templates.INSTANCE.nameSpan(folder.getName());
  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, final 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                 final int x = event.getClientX();
  94                 final int y = event.getClientY();
  95                 FolderTreeViewModel.this.selectionModel.setSelected(folder, true);
  96                 app.scheduleFolderHeadCommand(folder, new Command() {
  97
  98                                         @Override
  99                                         public void execute() {
 100                                 FolderContextMenu menu = new FolderContextMenu(app, FolderTreeView.images, app.getSelectedTree(), folder);
 101                                 menu.setPopupPosition(x, y);
 102                                 menu.show();
 103                                         }
 104                                 });
 105             }
 106         }
 107     };
 108
 109     protected ListDataProvider<Folder> rootDataProvider = new ListDataProvider<Folder>();
 110
 111     private Map<Folder, ListDataProvider<Folder>> dataProviderMap = new HashMap<Folder, ListDataProvider<Folder>>();
 112
 113     protected SingleSelectionModel<Folder> selectionModel;
 114
 115     public FolderTreeViewModel(Pithos _app, SingleSelectionModel<Folder> selectionModel) {
 116         app = _app;
 117         this.selectionModel = selectionModel;
 118     }
 119
 120     @Override
 121     public <T> NodeInfo<?> getNodeInfo(T value) {
 122         if (value == null) {
 123             Folder f = new Folder("Loading ...");
 124             rootDataProvider.getList().add(f);
 125             return new DefaultNodeInfo<Folder>(rootDataProvider, folderCell, selectionModel, null);
 126         }
 127                 final Folder f = (Folder) value;
 128                 if (dataProviderMap.get(f) == null) {
 129                     dataProviderMap.put(f, new ListDataProvider<Folder>());
 130                 }
 131                 final ListDataProvider<Folder> dataProvider = dataProviderMap.get(f);
 132                 //This prevents the loading indicator
 133                 fetchFolder(f, dataProvider, false, null);
 134                 return new DefaultNodeInfo<Folder>(dataProvider, folderCell, selectionModel, null);
 135     }
 136
 137     @Override
 138     public boolean isLeaf(Object o) {
 139         if (o instanceof Folder) {
 140             Folder f = (Folder) o;
 141             return f.getSubfolders().isEmpty();
 142         }
 143         return false;
 144     }
 145
 146         private native void log(String msg) /*-{
 147         $wnd.console.log(msg);
 148         }-*/;
 149
 150     protected void fetchFolder(final Iterator<Folder> iter, final Command callback) {
 151         if (iter.hasNext()) {
 152             final Folder f = iter.next();
 153
 154             String path = "/" + f.getContainer() + "?format=json&delimiter=/&prefix=" + URL.encodeQueryString(f.getPrefix());
 155             GetRequest<Folder> getFolder = new GetRequest<Folder>(app, Folder.class, app.getApiPath(), f.getOwnerID(), path, f) {
 156                 @Override
 157                 public void onSuccess(Folder _result) {
 158                     fetchFolder(iter, callback);
 159                 }
 160
 161                 @Override
 162                 public void onError(Throwable t) {
 163                         if (retries >= MAX_RETRIES) {
 164                             GWT.log("Error getting folder", t);
 165                                                 app.setError(t);
 166                             if (t instanceof RestException)
 167                                 app.displayError("Error getting folder: " + ((RestException) t).getHttpStatusText());
 168                             else
 169                                 app.displayError("System error fetching folder: " + t.getMessage());
 170                         }
 171                         else {//retry
 172                                 GWT.log("Retry " + retries);
 173                                 Scheduler.get().scheduleDeferred(this);
 174                         }
 175                 }
 176
 177                                 @Override
 178                                 protected void onUnauthorized(Response response) {
 179                                         if (retries >= MAX_RETRIES)
 180                                                 app.sessionExpired();
 181                         else //retry
 182                                 Scheduler.get().scheduleDeferred(this);
 183                                 }
 184             };
 185             getFolder.setHeader("X-Auth-Token", app.getUserToken());
 186             Scheduler.get().scheduleDeferred(getFolder);
 187         }
 188         else if (callback != null)
 189             callback.execute();
 190     }
 191
 192     public void initialize(final AccountResource account, final Command callback) {
 193         Iterator<Folder> iter = account.getContainers().listIterator();
 194         fetchFolder(iter, new Command() {
 195             @Override
 196             public void execute() {
 197                 rootDataProvider.getList().clear();
 198                 Folder t = null;
 199                 for (Folder c : account.getContainers()) {
 200                         if (c.isHome())
 201                         rootDataProvider.getList().add(0, c); //Pithos is always first
 202                         else if (c.isTrash())
 203                                 t = c; //Keep trash for adding in the end
 204                         else
 205                                 rootDataProvider.getList().add(c);
 206                 }
 207                 if (t != null)
 208                         rootDataProvider.getList().add(t);
 209                 selectionModel.setSelected(rootDataProvider.getList().get(0), true);
 210                 if (callback != null)
 211                         callback.execute();
 212             }
 213         });
 214     }
 215
 216     public Folder getSelection() {
 217         return selectionModel.getSelectedObject();
 218     }
 219
 220     public void updateFolder(final Folder folder, boolean showfiles, final Command callback, final boolean openParent) {
 221         if (dataProviderMap.get(folder) == null) {
 222             dataProviderMap.put(folder, new ListDataProvider<Folder>());
 223         }
 224         final ListDataProvider<Folder> dataProvider = dataProviderMap.get(folder);
 225         fetchFolder(folder, dataProvider, showfiles, new Command() {
 226
 227                         @Override
 228                         public void execute() {
 229                                 if (openParent)
 230                                         app.getFolderTreeView().openFolder(folder);
 231                                 if (callback != null)
 232                                         callback.execute();
 233                         }
 234                 });
 235     }
 236
 237     public void fetchFolder(final Folder f, final ListDataProvider<Folder> dataProvider, final boolean showfiles, final Command callback) {
 238         String path = "/" + f.getContainer() + "?format=json&delimiter=/&prefix=" + URL.encodeQueryString(f.getPrefix());
 239         GetRequest<Folder> getFolder = new GetRequest<Folder>(app, Folder.class, app.getApiPath(), f.getOwnerID(), path, f) {
 240             @Override
 241             public void onSuccess(final Folder _result) {
 242                 if (showfiles)
 243                     app.showFiles(_result);
 244                 int defaultSize = app.getFolderTreeView().tree.getDefaultNodeSize();
 245                 int size = _result.getSubfolders().size();
 246                 if (size > defaultSize)
 247                         app.getFolderTreeView().tree.setDefaultNodeSize(size);
 248                 Iterator<Folder> iter = new ArrayList<Folder>(_result.getSubfolders()).listIterator();
 249                 fetchFolder(iter, new Command() {
 250                     @Override
 251                     public void execute() {
 252                         dataProvider.getList().clear();
 253                         dataProvider.getList().addAll(_result.getSubfolders());
 254                         if (callback != null)
 255                                 callback.execute();
 256                     }
 257                 });
 258             }
 259
 260             @Override
 261             public void onError(Throwable t) {
 262                 if (retries >= MAX_RETRIES) {
 263                         GWT.log("Error getting folder", t);
 264                                         app.setError(t);
 265                         if (t instanceof RestException)
 266                             app.displayError("Error getting folder: " + ((RestException) t).getHttpStatusText());
 267                         else
 268                             app.displayError("System error fetching folder: " + t.getMessage());
 269                 }
 270                 else {//retry
 271                         GWT.log("Retry " + retries);
 272                         Scheduler.get().scheduleDeferred(this);
 273                 }
 274             }
 275
 276                         @Override
 277                         protected void onUnauthorized(Response response) {
 278                                 if (retries >= MAX_RETRIES)
 279                                         app.sessionExpired();
 280                 else //retry
 281                         Scheduler.get().scheduleDeferred(this);
 282                         }
 283         };
 284         getFolder.setHeader("X-Auth-Token", app.getUserToken());
 285         Scheduler.get().scheduleDeferred(getFolder);
 286     }
 287 }