code.grnet.gr Git - pithos/blob - web_client/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.HashMap;
  45 import java.util.Iterator;
  46 import java.util.Map;
  47
  48 import com.google.gwt.cell.client.AbstractCell;
  49 import com.google.gwt.cell.client.Cell;
  50 import com.google.gwt.core.client.GWT;
  51 import com.google.gwt.core.client.Scheduler;
  52 import com.google.gwt.core.client.Scheduler.ScheduledCommand;
  53 import com.google.gwt.event.dom.client.ContextMenuEvent;
  54 import com.google.gwt.safehtml.shared.SafeHtml;
  55 import com.google.gwt.safehtml.shared.SafeHtmlBuilder;
  56 import com.google.gwt.user.client.Command;
  57 import com.google.gwt.user.client.ui.AbstractImagePrototype;
  58 import com.google.gwt.view.client.ListDataProvider;
  59 import com.google.gwt.view.client.SingleSelectionModel;
  60 import com.google.gwt.view.client.TreeViewModel;
  61
  62 public class FolderTreeViewModel implements TreeViewModel {
  63
  64         protected Pithos app;
  65
  66     private Cell<Folder> folderCell = new AbstractCell<Folder>(ContextMenuEvent.getType().getName()) {
  67
  68        @Override
  69         public void render(@SuppressWarnings("unused") Context context, Folder folder, SafeHtmlBuilder safeHtmlBuilder) {
  70             String html;
  71             SafeHtml name;
  72                 if (folder.isHome()) {
  73                         html = AbstractImagePrototype.create(FolderTreeView.images.home()).getHTML();
  74                         name = Templates.INSTANCE.nameSpan("Home");
  75                 }
  76                 else if (folder.isTrash()) {
  77                         html = AbstractImagePrototype.create(FolderTreeView.images.trash()).getHTML();
  78                         name = Templates.INSTANCE.nameSpan("Trash");
  79                 }
  80             else {
  81                 html = AbstractImagePrototype.create(FolderTreeView.images.folderYellow()).getHTML();
  82                         name = Templates.INSTANCE.nameSpan(folder.getName());
  83             }
  84             safeHtmlBuilder.appendHtmlConstant(html);
  85             safeHtmlBuilder.append(name);
  86         }
  87
  88         @Override
  89         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) {
  90             if (event.getType().equals(ContextMenuEvent.getType().getName())) {
  91                 FolderTreeViewModel.this.selectionModel.setSelected(folder, true);
  92                 FolderContextMenu menu = new FolderContextMenu(app, FolderTreeView.images, folder);
  93                 menu.setPopupPosition(event.getClientX(), event.getClientY());
  94                 menu.show();
  95             }
  96         }
  97     };
  98
  99     protected ListDataProvider<Folder> rootDataProvider = new ListDataProvider<Folder>();
 100
 101     private Map<Folder, ListDataProvider<Folder>> dataProviderMap = new HashMap<Folder, ListDataProvider<Folder>>();
 102
 103     protected SingleSelectionModel<Folder> selectionModel;
 104
 105     public FolderTreeViewModel(Pithos _app, SingleSelectionModel<Folder> selectionModel) {
 106         app = _app;
 107         this.selectionModel = selectionModel;
 108     }
 109
 110     @Override
 111     public <T> NodeInfo<?> getNodeInfo(T value) {
 112         if (value == null) {
 113             Folder f = new Folder("Loading ...");
 114             rootDataProvider.getList().add(f);
 115             return new DefaultNodeInfo<Folder>(rootDataProvider, folderCell, selectionModel, null);
 116         }
 117                 final Folder f = (Folder) value;
 118                 if (dataProviderMap.get(f) == null) {
 119                     dataProviderMap.put(f, new ListDataProvider<Folder>());
 120                 }
 121                 final ListDataProvider<Folder> dataProvider = dataProviderMap.get(f);
 122                 fetchFolder(f, dataProvider, false, null);
 123                 return new DefaultNodeInfo<Folder>(dataProvider, folderCell, selectionModel, null);
 124     }
 125
 126     @Override
 127     public boolean isLeaf(Object o) {
 128         if (o instanceof Folder) {
 129             Folder f = (Folder) o;
 130             return f.getSubfolders().isEmpty();
 131         }
 132         return false;
 133     }
 134
 135     protected void fetchFolder(final Iterator<Folder> iter, final Command callback) {
 136         if (iter.hasNext()) {
 137             final Folder f = iter.next();
 138
 139             String path = "/" + f.getContainer() + "?format=json&delimiter=/&prefix=" + f.getPrefix();
 140             GetRequest<Folder> getFolder = new GetRequest<Folder>(Folder.class, app.getApiPath(), app.getUsername(), path, f) {
 141                 @Override
 142                 public void onSuccess(@SuppressWarnings("unused") Folder _result) {
 143                     fetchFolder(iter, callback);
 144                 }
 145
 146                 @Override
 147                 public void onError(Throwable t) {
 148                     GWT.log("Error getting folder", t);
 149                     if (t instanceof RestException)
 150                         app.displayError("Error getting folder: " + ((RestException) t).getHttpStatusText());
 151                     else
 152                         app.displayError("System error fetching folder: " + t.getMessage());
 153                 }
 154             };
 155             getFolder.setHeader("X-Auth-Token", app.getToken());
 156             Scheduler.get().scheduleDeferred(getFolder);
 157         }
 158         else if (callback != null)
 159             callback.execute();
 160     }
 161
 162     public void initialize(final AccountResource account) {
 163         Iterator<Folder> iter = account.getContainers().iterator();
 164         fetchFolder(iter, new Command() {
 165             @Override
 166             public void execute() {
 167                 rootDataProvider.getList().clear();
 168                 rootDataProvider.getList().addAll(account.getContainers());
 169                 selectionModel.setSelected(rootDataProvider.getList().get(0), true);
 170             }
 171         });
 172     }
 173
 174     public Folder getSelection() {
 175         return selectionModel.getSelectedObject();
 176     }
 177
 178     public void updateFolder(Folder folder, boolean showfiles, Command callback) {
 179         if (dataProviderMap.get(folder) == null) {
 180             dataProviderMap.put(folder, new ListDataProvider<Folder>());
 181         }
 182         final ListDataProvider<Folder> dataProvider = dataProviderMap.get(folder);
 183         fetchFolder(folder, dataProvider, showfiles, callback);
 184     }
 185
 186     public void fetchFolder(final Folder f, final ListDataProvider<Folder> dataProvider, final boolean showfiles, final Command callback) {
 187         Scheduler.get().scheduleDeferred(new ScheduledCommand() {
 188             @Override
 189             public void execute() {
 190                 String path = "/" + f.getContainer() + "?format=json&delimiter=/&prefix=" + f.getPrefix();
 191                 GetRequest<Folder> getFolder = new GetRequest<Folder>(Folder.class, app.getApiPath(), app.getUsername(), path, f) {
 192                     @Override
 193                     public void onSuccess(final Folder _result) {
 194                         if (showfiles)
 195                             app.showFiles(_result);
 196                         Iterator<Folder> iter = _result.getSubfolders().iterator();
 197                         fetchFolder(iter, new Command() {
 198                             @Override
 199                             public void execute() {
 200                                 dataProvider.getList().clear();
 201                                 dataProvider.getList().addAll(_result.getSubfolders());
 202                                 app.getFolderTreeView().updateChildren(f);
 203                                 if (callback != null)
 204                                         callback.execute();
 205                             }
 206                         });
 207                     }
 208
 209                     @Override
 210                     public void onError(Throwable t) {
 211                         GWT.log("Error getting folder", t);
 212                         if (t instanceof RestException)
 213                             app.displayError("Error getting folder: " + ((RestException) t).getHttpStatusText());
 214                         else
 215                             app.displayError("System error fetching folder: " + t.getMessage());
 216                     }
 217                 };
 218                 getFolder.setHeader("X-Auth-Token", app.getToken());
 219                 Scheduler.get().scheduleDeferred(getFolder);
 220             }
 221         });
 222     }
 223 }