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