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.HashSet;
  47 import java.util.Iterator;
  48 import java.util.Map;
  49
  50 import com.google.gwt.cell.client.AbstractCell;
  51 import com.google.gwt.cell.client.Cell;
  52 import com.google.gwt.core.client.GWT;
  53 import com.google.gwt.core.client.Scheduler;
  54 import com.google.gwt.event.dom.client.ContextMenuEvent;
  55 import com.google.gwt.http.client.Response;
  56 import com.google.gwt.http.client.URL;
  57 import com.google.gwt.safehtml.shared.SafeHtml;
  58 import com.google.gwt.safehtml.shared.SafeHtmlBuilder;
  59 import com.google.gwt.user.client.Command;
  60 import com.google.gwt.user.client.ui.AbstractImagePrototype;
  61 import com.google.gwt.user.client.ui.HTML;
  62 import com.google.gwt.view.client.AsyncDataProvider;
  63 import com.google.gwt.view.client.HasData;
  64 import com.google.gwt.view.client.ListDataProvider;
  65 import com.google.gwt.view.client.SingleSelectionModel;
  66 import com.google.gwt.view.client.TreeViewModel;
  67
  68 public class FolderTreeViewModel implements TreeViewModel {
  69
  70         protected Pithos app;
  71
  72     private Cell<Folder> folderCell = new AbstractCell<Folder>(ContextMenuEvent.getType().getName()) {
  73
  74        @Override
  75         public void render(@SuppressWarnings("unused") Context context, Folder folder, SafeHtmlBuilder safeHtmlBuilder) {
  76             String html;
  77             SafeHtml name;
  78                 if (folder.isHome()) {
  79                         html = AbstractImagePrototype.create(FolderTreeView.images.home()).getHTML();
  80                         name = Templates.INSTANCE.nameSpan("Home");
  81                 }
  82                 else if (folder.isTrash()) {
  83                         html = AbstractImagePrototype.create(FolderTreeView.images.trash()).getHTML();
  84                         name = Templates.INSTANCE.nameSpan("Trash");
  85                 }
  86             else {
  87                 html = AbstractImagePrototype.create(FolderTreeView.images.folderYellow()).getHTML();
  88                         name = Templates.INSTANCE.nameSpan(folder.getName());
  89             }
  90             safeHtmlBuilder.appendHtmlConstant(html).appendHtmlConstant("&nbsp;");
  91             safeHtmlBuilder.append(name);
  92         }
  93
  94         @Override
  95         public void onBrowserEvent(@SuppressWarnings("unused") Cell.Context context, @SuppressWarnings("unused") com.google.gwt.dom.client.Element parent, Folder folder, com.google.gwt.dom.client.NativeEvent event, @SuppressWarnings("unused") com.google.gwt.cell.client.ValueUpdater<Folder> valueUpdater) {
  96             if (event.getType().equals(ContextMenuEvent.getType().getName())) {
  97                 FolderTreeViewModel.this.selectionModel.setSelected(folder, true);
  98                 FolderContextMenu menu = new FolderContextMenu(app, FolderTreeView.images, app.getSelectedTree(), folder);
  99                 menu.setPopupPosition(event.getClientX(), event.getClientY());
 100                 menu.show();
 101             }
 102         }
 103     };
 104
 105     protected ListDataProvider<Folder> rootDataProvider = new ListDataProvider<Folder>();
 106
 107     private Map<Folder, ListDataProvider<Folder>> dataProviderMap = new HashMap<Folder, ListDataProvider<Folder>>();
 108
 109     protected SingleSelectionModel<Folder> selectionModel;
 110
 111     public FolderTreeViewModel(Pithos _app, SingleSelectionModel<Folder> selectionModel) {
 112         app = _app;
 113         this.selectionModel = selectionModel;
 114     }
 115
 116     @Override
 117     public <T> NodeInfo<?> getNodeInfo(T value) {
 118         if (value == null) {
 119             Folder f = new Folder("Loading ...");
 120             rootDataProvider.getList().add(f);
 121             return new DefaultNodeInfo<Folder>(rootDataProvider, folderCell, selectionModel, null);
 122         }
 123                 final Folder f = (Folder) value;
 124                 if (dataProviderMap.get(f) == null) {
 125                     dataProviderMap.put(f, new ListDataProvider<Folder>());
 126                 }
 127                 final ListDataProvider<Folder> dataProvider = dataProviderMap.get(f);
 128                 //This prevents the loading indicator
 129 //              dataProvider.getList().clear();
 130 //              dataProvider.getList().addAll(f.getSubfolders());
 131                 fetchFolder(f, dataProvider, false, null);
 132                 return new DefaultNodeInfo<Folder>(dataProvider, folderCell, selectionModel, null);
 133     }
 134
 135     @Override
 136     public boolean isLeaf(Object o) {
 137         if (o instanceof Folder) {
 138             Folder f = (Folder) o;
 139             return f.getSubfolders().isEmpty();
 140         }
 141         return false;
 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(@SuppressWarnings("unused") Folder _result) {
 152                     fetchFolder(iter, callback);
 153                 }
 154
 155                 @Override
 156                 public void onError(Throwable t) {
 157                     GWT.log("Error getting folder", t);
 158                     if (t instanceof RestException)
 159                         app.displayError("Error getting folder: " + ((RestException) t).getHttpStatusText());
 160                     else
 161                         app.displayError("System error fetching folder: " + t.getMessage());
 162                 }
 163
 164                                 @Override
 165                                 protected void onUnauthorized(Response response) {
 166                                         app.sessionExpired();
 167                                 }
 168             };
 169             getFolder.setHeader("X-Auth-Token", app.getToken());
 170             Scheduler.get().scheduleDeferred(getFolder);
 171         }
 172         else if (callback != null)
 173             callback.execute();
 174     }
 175
 176     public void initialize(final AccountResource account, final Command callback) {
 177         Iterator<Folder> iter = account.getContainers().iterator();
 178         fetchFolder(iter, new Command() {
 179             @Override
 180             public void execute() {
 181                 rootDataProvider.getList().clear();
 182                 rootDataProvider.getList().addAll(account.getContainers());
 183                 selectionModel.setSelected(rootDataProvider.getList().get(0), true);
 184                 if (callback != null)
 185                         callback.execute();
 186             }
 187         });
 188     }
 189
 190     public Folder getSelection() {
 191         return selectionModel.getSelectedObject();
 192     }
 193
 194     public void updateFolder(final Folder folder, boolean showfiles, final Command callback) {
 195         if (dataProviderMap.get(folder) == null) {
 196             dataProviderMap.put(folder, new ListDataProvider<Folder>());
 197         }
 198         final ListDataProvider<Folder> dataProvider = dataProviderMap.get(folder);
 199         fetchFolder(folder, dataProvider, showfiles, new Command() {
 200
 201                         @Override
 202                         public void execute() {
 203                                 app.getFolderTreeView().openFolder(folder);
 204                                 if (callback != null)
 205                                         callback.execute();
 206                         }
 207                 });
 208     }
 209
 210     public void fetchFolder(final Folder f, final ListDataProvider<Folder> dataProvider, final boolean showfiles, final Command callback) {
 211         String path = "/" + f.getContainer() + "?format=json&delimiter=/&prefix=" + URL.encodeQueryString(f.getPrefix());
 212         GetRequest<Folder> getFolder = new GetRequest<Folder>(Folder.class, app.getApiPath(), f.getOwner(), path, f) {
 213             @Override
 214             public void onSuccess(final Folder _result) {
 215                 if (showfiles)
 216                     app.showFiles(_result);
 217                 Iterator<Folder> iter = _result.getSubfolders().iterator();
 218                 fetchFolder(iter, new Command() {
 219                     @Override
 220                     public void execute() {
 221                         dataProvider.getList().clear();
 222                         dataProvider.getList().addAll(_result.getSubfolders());
 223 //                        app.getFolderTreeView().updateChildren(f);
 224                         if (callback != null)
 225                                 callback.execute();
 226                     }
 227                 });
 228             }
 229
 230             @Override
 231             public void onError(Throwable t) {
 232                 GWT.log("Error getting folder", t);
 233                 if (t instanceof RestException)
 234                     app.displayError("Error getting folder: " + ((RestException) t).getHttpStatusText());
 235                 else
 236                     app.displayError("System error fetching folder: " + t.getMessage());
 237             }
 238
 239                         @Override
 240                         protected void onUnauthorized(Response response) {
 241                                 app.sessionExpired();
 242                         }
 243         };
 244         getFolder.setHeader("X-Auth-Token", app.getToken());
 245         Scheduler.get().scheduleDeferred(getFolder);
 246     }
 247 }