code.grnet.gr Git - pithos-web-client/blob - src/gr/grnet/pithos/web/client/mysharedtree/MysharedTreeViewModel.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.mysharedtree;
  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.File;
  41 import gr.grnet.pithos.web.client.foldertree.Folder;
  42 import gr.grnet.pithos.web.client.mysharedtree.MysharedTreeView.Templates;
  43 import gr.grnet.pithos.web.client.rest.GetRequest;
  44 import gr.grnet.pithos.web.client.rest.RestException;
  45
  46 import java.util.ArrayList;
  47 import java.util.HashMap;
  48 import java.util.HashSet;
  49 import java.util.Iterator;
  50 import java.util.List;
  51 import java.util.Map;
  52 import java.util.Set;
  53
  54 import com.google.gwt.cell.client.AbstractCell;
  55 import com.google.gwt.cell.client.Cell;
  56 import com.google.gwt.cell.client.TextCell;
  57 import com.google.gwt.cell.client.ValueUpdater;
  58 import com.google.gwt.core.client.GWT;
  59 import com.google.gwt.core.client.Scheduler;
  60 import com.google.gwt.event.dom.client.ContextMenuEvent;
  61 import com.google.gwt.http.client.Response;
  62 import com.google.gwt.http.client.URL;
  63 import com.google.gwt.safehtml.shared.SafeHtml;
  64 import com.google.gwt.safehtml.shared.SafeHtmlBuilder;
  65 import com.google.gwt.text.shared.SafeHtmlRenderer;
  66 import com.google.gwt.user.client.Command;
  67 import com.google.gwt.user.client.ui.AbstractImagePrototype;
  68 import com.google.gwt.view.client.ListDataProvider;
  69 import com.google.gwt.view.client.SelectionChangeEvent;
  70 import com.google.gwt.view.client.SelectionChangeEvent.Handler;
  71 import com.google.gwt.view.client.SingleSelectionModel;
  72 import com.google.gwt.view.client.TreeViewModel;
  73
  74 public class MysharedTreeViewModel implements TreeViewModel {
  75
  76     protected Pithos app;
  77
  78     private Cell<Folder> folderCell = new AbstractCell<Folder>() {
  79
  80        @Override
  81         public void render(Context context, Folder folder, SafeHtmlBuilder safeHtmlBuilder) {
  82             String html = AbstractImagePrototype.create(MysharedTreeView.images.folderYellow()).getHTML();
  83             safeHtmlBuilder.appendHtmlConstant(html).appendHtmlConstant("&nbsp;");
  84             safeHtmlBuilder.append(Templates.INSTANCE.nameSpan(folder.getName()));
  85         }
  86
  87         @Override
  88         public void onBrowserEvent(Context context, com.google.gwt.dom.client.Element parent, Folder folder, com.google.gwt.dom.client.NativeEvent event, ValueUpdater<Folder> valueUpdater) {
  89             if (event.getType().equals(ContextMenuEvent.getType().getName())) {
  90                 MysharedTreeViewModel.this.selectionModel.setSelected(folder, true);
  91                 FolderContextMenu menu = new FolderContextMenu(app, MysharedTreeView.images, app.getSelectedTree(), folder);
  92                 menu.setPopupPosition(event.getClientX(), event.getClientY());
  93                 menu.show();
  94             }
  95         }
  96     };
  97
  98     protected ListDataProvider<Folder> firstLevelDataProvider = new ListDataProvider<Folder>();
  99
 100     private Map<Folder, ListDataProvider<Folder>> dataProviderMap = new HashMap<Folder, ListDataProvider<Folder>>();
 101
 102     protected Set<File> sharedFiles = new HashSet<File>();
 103
 104     protected SingleSelectionModel<Folder> selectionModel;
 105
 106     public MysharedTreeViewModel(Pithos _app, SingleSelectionModel<Folder> selectionModel) {
 107         app = _app;
 108         this.selectionModel = selectionModel;
 109     }
 110
 111     @Override
 112     public <T> NodeInfo<?> getNodeInfo(T value) {
 113         if (value == null) {
 114             ListDataProvider<String> rootDataProvider = new ListDataProvider<String>();
 115             rootDataProvider.getList().add("My Shared");
 116             final SingleSelectionModel<String> selectionModel2 = new SingleSelectionModel<String>();
 117             selectionModel2.addSelectionChangeHandler(new Handler() {
 118
 119                 @Override
 120                 public void onSelectionChange(SelectionChangeEvent event) {
 121                     if (selectionModel2.getSelectedObject() != null) {
 122                         app.deselectOthers(app.getMySharedTreeView(), selectionModel2);
 123                         app.applyPermissions(null);
 124                         fetchSharedFiles(true);
 125                     }
 126                     app.showRelevantToolbarButtons();
 127                 }
 128             });
 129             app.addSelectionModel(selectionModel2);
 130             return new DefaultNodeInfo<String>(rootDataProvider, new TextCell(new SafeHtmlRenderer<String>() {
 131                 @Override
 132                 public SafeHtml render(String object) {
 133                     SafeHtmlBuilder builder = new SafeHtmlBuilder();
 134                     render(object, builder);
 135                     return builder.toSafeHtml();
 136                 }
 137
 138                 @Override
 139                 public void render(String object, SafeHtmlBuilder builder) {
 140                     String html = AbstractImagePrototype.create(MysharedTreeView.images.myShared()).getHTML();
 141                     builder.appendHtmlConstant(html).appendHtmlConstant("&nbsp;");
 142                     builder.append(MysharedTreeView.Templates.INSTANCE.nameSpan(object));
 143                 }
 144             }),  selectionModel2, null);
 145         }
 146         else if (value instanceof String) {
 147                 fetchSharedContainers(null);
 148             return new DefaultNodeInfo<Folder>(firstLevelDataProvider, folderCell, selectionModel, null);
 149         }
 150         else {
 151             final Folder f = (Folder) value;
 152             if (dataProviderMap.get(f) == null) {
 153                 dataProviderMap.put(f, new ListDataProvider<Folder>());
 154             }
 155             final ListDataProvider<Folder> dataProvider = dataProviderMap.get(f);
 156             fetchFolder(f, dataProvider, false);
 157             return new DefaultNodeInfo<Folder>(dataProvider, folderCell, selectionModel, null);
 158         }
 159     }
 160
 161         protected void fetchSharedFiles(final boolean showFiles) {
 162                 sharedFiles.clear();
 163         final List<Folder> containers = app.getAccount().getContainers();
 164         final ListDataProvider<Folder> tempProvider = new ListDataProvider<Folder>();
 165         Iterator<Folder> iter = containers.iterator();
 166         fetchFolder(iter, tempProvider, new Command() {
 167
 168                         @Override
 169                         public void execute() {
 170                                 firstLevelDataProvider.getList().clear();
 171                                 firstLevelDataProvider.getList().addAll(tempProvider.getList());
 172                                 if (showFiles)
 173                                         app.showFiles(sharedFiles);
 174                         }
 175                 });
 176         }
 177
 178         private void fetchSharedContainers(final Command callback) {
 179         final List<Folder> containers = app.getAccount().getContainers();
 180         final ListDataProvider<Folder> tempProvider = new ListDataProvider<Folder>();
 181         Iterator<Folder> iter = containers.listIterator();
 182         fetchFolder(iter, tempProvider, new Command() {
 183
 184                         @Override
 185                         public void execute() {
 186                                 firstLevelDataProvider.getList().clear();
 187                                 firstLevelDataProvider.getList().addAll(tempProvider.getList());
 188                                 if (callback != null)
 189                                         callback.execute();
 190                         }
 191                 });
 192         }
 193
 194         @Override
 195     public boolean isLeaf(Object o) {
 196                 if (o == null)
 197                         return false;
 198                 else if (o instanceof Folder) {
 199             Folder f = (Folder) o;
 200             return f.getSubfolders().isEmpty();
 201         }
 202                 else {
 203                         return firstLevelDataProvider.getList().isEmpty();
 204                 }
 205     }
 206
 207         private native void log(String msg) /*-{
 208                 $wnd.console.log(msg);
 209         }-*/;
 210
 211     protected void fetchFolder(final Iterator<Folder> iter, final ListDataProvider<Folder> dataProvider, final Command callback) {
 212         if (iter.hasNext()) {
 213             final Folder f = iter.next();
 214
 215             String path = "/" + f.getContainer() + "?format=json&delimiter=/&prefix=" + URL.encodeQueryString(f.getPrefix());
 216             GetRequest<Folder> getFolder = new GetRequest<Folder>(Folder.class, app.getApiPath(), f.getOwner(), path, f) {
 217                 @Override
 218                 public void onSuccess(Folder _result) {
 219                         if (!_result.isShared()) {
 220                                 for (File file : _result.getFiles()) {
 221                                         if (file.isShared())
 222                                                 sharedFiles.add(file);
 223                                 }
 224                                 Iterator<Folder> iter2 = new ArrayList<Folder>(result.getSubfolders()).listIterator();
 225                                 fetchFolder(iter2, dataProvider, new Command() {
 226
 227                                                         @Override
 228                                                         public void execute() {
 229                                             fetchFolder(iter, dataProvider, callback);
 230                                                         }
 231                                                 });
 232                         }
 233                         else {
 234                                 dataProvider.getList().add(_result);
 235                             fetchFolder(iter, dataProvider, callback);
 236                         }
 237                 }
 238
 239                 @Override
 240                 public void onError(Throwable t) {
 241                     GWT.log("Error getting folder", t);
 242                                         app.setError(t);
 243                     if (t instanceof RestException)
 244                         app.displayError("Error getting folder: " + ((RestException) t).getHttpStatusText());
 245                     else
 246                         app.displayError("System error fetching folder: " + t.getMessage());
 247                 }
 248
 249                                 @Override
 250                                 protected void onUnauthorized(Response response) {
 251                                         app.sessionExpired();
 252                                 }
 253             };
 254             getFolder.setHeader("X-Auth-Token", app.getToken());
 255             Scheduler.get().scheduleDeferred(getFolder);
 256         }
 257         else if (callback != null)
 258             callback.execute();
 259     }
 260
 261     public Folder getSelection() {
 262         return selectionModel.getSelectedObject();
 263     }
 264
 265     public void updateFolder(Folder folder, boolean showfiles) {
 266         if (dataProviderMap.get(folder) == null) {
 267             dataProviderMap.put(folder, new ListDataProvider<Folder>());
 268         }
 269         final ListDataProvider<Folder> dataProvider = dataProviderMap.get(folder);
 270         fetchFolder(folder, dataProvider, showfiles);
 271     }
 272
 273     public void fetchFolder(final Folder f, final ListDataProvider<Folder> dataProvider, final boolean showfiles) {
 274         String path = "/" + f.getContainer() + "?format=json&delimiter=/&prefix=" + URL.encodeQueryString(f.getPrefix());
 275         GetRequest<Folder> getFolder = new GetRequest<Folder>(Folder.class, app.getApiPath(), f.getOwner(), path, f) {
 276             @Override
 277             public void onSuccess(final Folder _result) {
 278                 if (showfiles)
 279                     app.showFiles(_result);
 280                 Iterator<Folder> iter = _result.getSubfolders().iterator();
 281                 fetchFolder(iter, dataProvider, new Command() {
 282                     @Override
 283                     public void execute() {
 284                         dataProvider.getList().clear();
 285                                 dataProvider.getList().addAll(_result.getSubfolders());
 286                         app.getMySharedTreeView().updateChildren(f);
 287                     }
 288                 });
 289             }
 290
 291             @Override
 292             public void onError(Throwable t) {
 293                 GWT.log("Error getting folder", t);
 294                                 app.setError(t);
 295                 if (t instanceof RestException)
 296                     app.displayError("Error getting folder: " + ((RestException) t).getHttpStatusText());
 297                 else
 298                     app.displayError("System error fetching folder: " + t.getMessage());
 299             }
 300
 301                         @Override
 302                         protected void onUnauthorized(Response response) {
 303                                 app.sessionExpired();
 304                         }
 305         };
 306         getFolder.setHeader("X-Auth-Token", app.getToken());
 307         Scheduler.get().scheduleDeferred(getFolder);
 308     }
 309
 310         public void initialize(Command callback) {
 311                 fetchSharedContainers(callback);
 312         }
 313 }