code.grnet.gr Git - pithos-web-client/blob - src/gr/grnet/pithos/web/client/mysharedtree/MysharedTreeViewModel.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.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.foldertree.FolderTreeView;
  43 import gr.grnet.pithos.web.client.mysharedtree.MysharedTreeView.Templates;
  44 import gr.grnet.pithos.web.client.rest.GetRequest;
  45 import gr.grnet.pithos.web.client.rest.RestException;
  46
  47 import java.util.ArrayList;
  48 import java.util.HashMap;
  49 import java.util.HashSet;
  50 import java.util.Iterator;
  51 import java.util.List;
  52 import java.util.Map;
  53 import java.util.Set;
  54
  55 import com.google.gwt.cell.client.AbstractCell;
  56 import com.google.gwt.cell.client.Cell;
  57 import com.google.gwt.cell.client.TextCell;
  58 import com.google.gwt.cell.client.ValueUpdater;
  59 import com.google.gwt.core.client.GWT;
  60 import com.google.gwt.core.client.Scheduler;
  61 import com.google.gwt.event.dom.client.ContextMenuEvent;
  62 import com.google.gwt.http.client.Response;
  63 import com.google.gwt.http.client.URL;
  64 import com.google.gwt.safehtml.shared.SafeHtml;
  65 import com.google.gwt.safehtml.shared.SafeHtmlBuilder;
  66 import com.google.gwt.text.shared.SafeHtmlRenderer;
  67 import com.google.gwt.user.client.Command;
  68 import com.google.gwt.user.client.ui.AbstractImagePrototype;
  69 import com.google.gwt.view.client.ListDataProvider;
  70 import com.google.gwt.view.client.SelectionChangeEvent;
  71 import com.google.gwt.view.client.SelectionChangeEvent.Handler;
  72 import com.google.gwt.view.client.SingleSelectionModel;
  73 import com.google.gwt.view.client.TreeViewModel;
  74
  75 public class MysharedTreeViewModel implements TreeViewModel {
  76
  77     protected Pithos app;
  78
  79     private Cell<Folder> folderCell = new AbstractCell<Folder>() {
  80
  81        @Override
  82         public void render(Context context, Folder folder, SafeHtmlBuilder safeHtmlBuilder) {
  83             String html = AbstractImagePrototype.create(MysharedTreeView.images.folderYellow()).getHTML();
  84             safeHtmlBuilder.appendHtmlConstant(html).appendHtmlConstant("&nbsp;");
  85             safeHtmlBuilder.append(Templates.INSTANCE.nameSpan(folder.getName()));
  86         }
  87
  88         @Override
  89         public void onBrowserEvent(Context context, com.google.gwt.dom.client.Element parent, final Folder folder, com.google.gwt.dom.client.NativeEvent event, ValueUpdater<Folder> valueUpdater) {
  90             if (event.getType().equals(ContextMenuEvent.getType().getName())) {
  91                 final int x = event.getClientX();
  92                 final int y = event.getClientY();
  93                 MysharedTreeViewModel.this.selectionModel.setSelected(folder, true);
  94                 app.scheduleFolderHeadCommand(folder, new Command() {
  95
  96                                         @Override
  97                                         public void execute() {
  98                                 FolderContextMenu menu = new FolderContextMenu(app, MysharedTreeView.images, app.getSelectedTree(), folder);
  99                                 menu.setPopupPosition(x, y);
 100                                 menu.show();
 101                                         }
 102                                 });
 103             }
 104         }
 105     };
 106
 107     protected ListDataProvider<Folder> firstLevelDataProvider = new ListDataProvider<Folder>();
 108
 109     private Map<Folder, ListDataProvider<Folder>> dataProviderMap = new HashMap<Folder, ListDataProvider<Folder>>();
 110
 111     protected Set<File> sharedFiles = new HashSet<File>();
 112
 113     protected SingleSelectionModel<Folder> selectionModel;
 114
 115     public MysharedTreeViewModel(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             ListDataProvider<String> rootDataProvider = new ListDataProvider<String>();
 124             rootDataProvider.getList().add("Shared by me");
 125             final SingleSelectionModel<String> selectionModel2 = new SingleSelectionModel<String>();
 126             selectionModel2.addSelectionChangeHandler(new Handler() {
 127
 128                 @Override
 129                 public void onSelectionChange(SelectionChangeEvent event) {
 130                     if (selectionModel2.getSelectedObject() != null) {
 131                         app.deselectOthers(app.getMySharedTreeView(), selectionModel2);
 132                         app.applyPermissions(null);
 133                         fetchSharedFiles(true);
 134                                         app.showRelevantToolbarButtons();
 135                     }
 136                                 else {
 137                                         if (app.getSelectedTree().equals(app.getMySharedTreeView()) && app.getMySharedTreeView().getSelection() == null)
 138                                                 app.setSelectedTree(null);
 139                                         if (app.getSelectedTree() == null)
 140                                                 app.showRelevantToolbarButtons();
 141                                 }
 142                 }
 143             });
 144             app.addSelectionModel(selectionModel2);
 145             return new DefaultNodeInfo<String>(rootDataProvider, new TextCell(new SafeHtmlRenderer<String>() {
 146                 @Override
 147                 public SafeHtml render(String object) {
 148                     SafeHtmlBuilder builder = new SafeHtmlBuilder();
 149                     render(object, builder);
 150                     return builder.toSafeHtml();
 151                 }
 152
 153                 @Override
 154                 public void render(String object, SafeHtmlBuilder builder) {
 155                     String html = AbstractImagePrototype.create(MysharedTreeView.images.myShared()).getHTML();
 156                     builder.appendHtmlConstant(html).appendHtmlConstant("&nbsp;");
 157                     builder.append(MysharedTreeView.Templates.INSTANCE.nameSpan(object));
 158                 }
 159             }),  selectionModel2, null);
 160         }
 161         else if (value instanceof String) {
 162                 fetchSharedContainers(null);
 163             return new DefaultNodeInfo<Folder>(firstLevelDataProvider, folderCell, selectionModel, null);
 164         }
 165         else {
 166             final Folder f = (Folder) value;
 167             if (dataProviderMap.get(f) == null) {
 168                 dataProviderMap.put(f, new ListDataProvider<Folder>());
 169             }
 170             final ListDataProvider<Folder> dataProvider = dataProviderMap.get(f);
 171             fetchFolder(f, dataProvider, false);
 172             return new DefaultNodeInfo<Folder>(dataProvider, folderCell, selectionModel, null);
 173         }
 174     }
 175
 176         protected void fetchSharedFiles(final boolean showFiles) {
 177                 sharedFiles.clear();
 178         final List<Folder> containers = app.getAccount().getContainers();
 179         final ListDataProvider<Folder> tempProvider = new ListDataProvider<Folder>();
 180         Iterator<Folder> iter = containers.iterator();
 181         fetchFolder(iter, tempProvider, new Command() {
 182
 183                         @Override
 184                         public void execute() {
 185                                 firstLevelDataProvider.getList().clear();
 186                                 firstLevelDataProvider.getList().addAll(tempProvider.getList());
 187                                 if (showFiles)
 188                                         app.showFiles(sharedFiles);
 189                         }
 190                 });
 191         }
 192
 193         private void fetchSharedContainers(final Command callback) {
 194         final List<Folder> containers = app.getAccount().getContainers();
 195         final ListDataProvider<Folder> tempProvider = new ListDataProvider<Folder>();
 196         Iterator<Folder> iter = containers.listIterator();
 197         fetchFolder(iter, tempProvider, new Command() {
 198
 199                         @Override
 200                         public void execute() {
 201                                 firstLevelDataProvider.getList().clear();
 202                                 firstLevelDataProvider.getList().addAll(tempProvider.getList());
 203                                 if (callback != null)
 204                                         callback.execute();
 205                         }
 206                 });
 207         }
 208
 209         @Override
 210     public boolean isLeaf(Object o) {
 211                 if (o == null)
 212                         return false;
 213                 else if (o instanceof Folder) {
 214             Folder f = (Folder) o;
 215             return f.getSubfolders().isEmpty();
 216         }
 217                 else {
 218                         return firstLevelDataProvider.getList().isEmpty();
 219                 }
 220     }
 221
 222         private native void log(String msg) /*-{
 223                 $wnd.console.log(msg);
 224         }-*/;
 225
 226     protected void fetchFolder(final Iterator<Folder> iter, final ListDataProvider<Folder> dataProvider, final Command callback) {
 227         if (iter.hasNext()) {
 228             final Folder f = iter.next();
 229
 230             String path = "/" + f.getContainer() + "?format=json&delimiter=/&prefix=" + URL.encodeQueryString(f.getPrefix());
 231             GetRequest<Folder> getFolder = new GetRequest<Folder>(Folder.class, app.getApiPath(), f.getOwner(), path, f) {
 232                 @Override
 233                 public void onSuccess(Folder _result) {
 234                         if (!_result.isShared()) {
 235                                 for (File file : _result.getFiles()) {
 236                                         if (file.isShared())
 237                                                 sharedFiles.add(file);
 238                                 }
 239                                 Iterator<Folder> iter2 = new ArrayList<Folder>(result.getSubfolders()).listIterator();
 240                                 fetchFolder(iter2, dataProvider, new Command() {
 241
 242                                                         @Override
 243                                                         public void execute() {
 244                                             fetchFolder(iter, dataProvider, callback);
 245                                                         }
 246                                                 });
 247                         }
 248                         else {
 249                                 dataProvider.getList().add(_result);
 250                             fetchFolder(iter, dataProvider, callback);
 251                         }
 252                 }
 253
 254                 @Override
 255                 public void onError(Throwable t) {
 256                     GWT.log("Error getting folder", t);
 257                                         app.setError(t);
 258                     if (t instanceof RestException)
 259                         app.displayError("Error getting folder: " + ((RestException) t).getHttpStatusText());
 260                     else
 261                         app.displayError("System error fetching folder: " + t.getMessage());
 262                 }
 263
 264                                 @Override
 265                                 protected void onUnauthorized(Response response) {
 266                                         app.sessionExpired();
 267                                 }
 268             };
 269             getFolder.setHeader("X-Auth-Token", app.getToken());
 270             Scheduler.get().scheduleDeferred(getFolder);
 271         }
 272         else if (callback != null)
 273             callback.execute();
 274     }
 275
 276     public Folder getSelection() {
 277         return selectionModel.getSelectedObject();
 278     }
 279
 280     public void updateFolder(Folder folder, boolean showfiles) {
 281         if (dataProviderMap.get(folder) == null) {
 282             dataProviderMap.put(folder, new ListDataProvider<Folder>());
 283         }
 284         final ListDataProvider<Folder> dataProvider = dataProviderMap.get(folder);
 285         fetchFolder(folder, dataProvider, showfiles);
 286     }
 287
 288     public void fetchFolder(final Folder f, final ListDataProvider<Folder> dataProvider, final boolean showfiles) {
 289         String path = "/" + f.getContainer() + "?format=json&delimiter=/&prefix=" + URL.encodeQueryString(f.getPrefix());
 290         GetRequest<Folder> getFolder = new GetRequest<Folder>(Folder.class, app.getApiPath(), f.getOwner(), path, f) {
 291             @Override
 292             public void onSuccess(final Folder _result) {
 293                 if (showfiles)
 294                     app.showFiles(_result);
 295                 Iterator<Folder> iter = _result.getSubfolders().iterator();
 296                 fetchFolder(iter, dataProvider, new Command() {
 297                     @Override
 298                     public void execute() {
 299                         dataProvider.getList().clear();
 300                                 dataProvider.getList().addAll(_result.getSubfolders());
 301                         app.getMySharedTreeView().updateChildren(f);
 302                     }
 303                 });
 304             }
 305
 306             @Override
 307             public void onError(Throwable t) {
 308                 GWT.log("Error getting folder", t);
 309                                 app.setError(t);
 310                 if (t instanceof RestException)
 311                     app.displayError("Error getting folder: " + ((RestException) t).getHttpStatusText());
 312                 else
 313                     app.displayError("System error fetching folder: " + t.getMessage());
 314             }
 315
 316                         @Override
 317                         protected void onUnauthorized(Response response) {
 318                                 app.sessionExpired();
 319                         }
 320         };
 321         getFolder.setHeader("X-Auth-Token", app.getToken());
 322         Scheduler.get().scheduleDeferred(getFolder);
 323     }
 324
 325         public void initialize(Command callback) {
 326                 fetchSharedContainers(callback);
 327         }
 328 }