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.AccountResource;
  41 import gr.grnet.pithos.web.client.foldertree.File;
  42 import gr.grnet.pithos.web.client.foldertree.Folder;
  43 import gr.grnet.pithos.web.client.foldertree.FolderTreeView;
  44 import gr.grnet.pithos.web.client.mysharedtree.MysharedTreeView.Templates;
  45 import gr.grnet.pithos.web.client.rest.GetRequest;
  46 import gr.grnet.pithos.web.client.rest.RestException;
  47
  48 import java.util.ArrayList;
  49 import java.util.HashMap;
  50 import java.util.HashSet;
  51 import java.util.Iterator;
  52 import java.util.List;
  53 import java.util.Map;
  54 import java.util.Set;
  55
  56 import com.google.gwt.cell.client.AbstractCell;
  57 import com.google.gwt.cell.client.Cell;
  58 import com.google.gwt.cell.client.TextCell;
  59 import com.google.gwt.cell.client.ValueUpdater;
  60 import com.google.gwt.core.client.GWT;
  61 import com.google.gwt.core.client.Scheduler;
  62 import com.google.gwt.event.dom.client.ContextMenuEvent;
  63 import com.google.gwt.http.client.Response;
  64 import com.google.gwt.http.client.URL;
  65 import com.google.gwt.safehtml.shared.SafeHtml;
  66 import com.google.gwt.safehtml.shared.SafeHtmlBuilder;
  67 import com.google.gwt.text.shared.SafeHtmlRenderer;
  68 import com.google.gwt.user.client.Command;
  69 import com.google.gwt.user.client.ui.AbstractImagePrototype;
  70 import com.google.gwt.view.client.ListDataProvider;
  71 import com.google.gwt.view.client.SelectionChangeEvent;
  72 import com.google.gwt.view.client.SelectionChangeEvent.Handler;
  73 import com.google.gwt.view.client.SingleSelectionModel;
  74 import com.google.gwt.view.client.TreeViewModel;
  75
  76 public class MysharedTreeViewModel implements TreeViewModel {
  77
  78     protected Pithos app;
  79
  80     private Cell<Folder> folderCell = new AbstractCell<Folder>() {
  81
  82        @Override
  83         public void render(Context context, Folder folder, SafeHtmlBuilder safeHtmlBuilder) {
  84             String html = AbstractImagePrototype.create(MysharedTreeView.images.folderYellow()).getHTML();
  85             safeHtmlBuilder.appendHtmlConstant(html).appendHtmlConstant("&nbsp;");
  86             safeHtmlBuilder.append(Templates.INSTANCE.nameSpan(folder.getName()));
  87         }
  88
  89         @Override
  90         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) {
  91             if (event.getType().equals(ContextMenuEvent.getType().getName())) {
  92                 final int x = event.getClientX();
  93                 final int y = event.getClientY();
  94                 MysharedTreeViewModel.this.selectionModel.setSelected(folder, true);
  95                 app.scheduleFolderHeadCommand(folder, new Command() {
  96
  97                                         @Override
  98                                         public void execute() {
  99                                 FolderContextMenu menu = new FolderContextMenu(app, MysharedTreeView.images, app.getSelectedTree(), folder);
 100                                 menu.setPopupPosition(x, y);
 101                                 menu.show();
 102                                         }
 103                                 });
 104             }
 105         }
 106     };
 107
 108     protected ListDataProvider<Folder> firstLevelDataProvider = new ListDataProvider<Folder>();
 109
 110     private Map<Folder, ListDataProvider<Folder>> dataProviderMap = new HashMap<Folder, ListDataProvider<Folder>>();
 111
 112     protected SingleSelectionModel<Folder> selectionModel;
 113
 114     public MysharedTreeViewModel(Pithos _app, SingleSelectionModel<Folder> selectionModel) {
 115         app = _app;
 116         this.selectionModel = selectionModel;
 117     }
 118
 119     @Override
 120     public <T> NodeInfo<?> getNodeInfo(T value) {
 121         if (value == null) {
 122             ListDataProvider<String> rootDataProvider = new ListDataProvider<String>();
 123             rootDataProvider.getList().add("Shared by me");
 124             return new DefaultNodeInfo<String>(rootDataProvider, new TextCell(new SafeHtmlRenderer<String>() {
 125                 @Override
 126                 public SafeHtml render(String object) {
 127                     SafeHtmlBuilder builder = new SafeHtmlBuilder();
 128                     render(object, builder);
 129                     return builder.toSafeHtml();
 130                 }
 131
 132                 @Override
 133                 public void render(String object, SafeHtmlBuilder builder) {
 134                     String html = AbstractImagePrototype.create(MysharedTreeView.images.myShared()).getHTML();
 135                     builder.appendHtmlConstant(html).appendHtmlConstant("&nbsp;");
 136                     builder.append(MysharedTreeView.Templates.INSTANCE.nameSpan(object));
 137                 }
 138             }),  null, null);
 139         }
 140         else if (value instanceof String) {
 141                 fetchSharedContainers(null);
 142             return new DefaultNodeInfo<Folder>(firstLevelDataProvider, folderCell, selectionModel, null);
 143         }
 144         else {
 145             final Folder f = (Folder) value;
 146             if (dataProviderMap.get(f) == null) {
 147                 dataProviderMap.put(f, new ListDataProvider<Folder>());
 148             }
 149             final ListDataProvider<Folder> dataProvider = dataProviderMap.get(f);
 150             fetchFolder(f, dataProvider, false);
 151             return new DefaultNodeInfo<Folder>(dataProvider, folderCell, selectionModel, null);
 152         }
 153     }
 154
 155         private void fetchSharedContainers(final Command callback) {
 156         String path = "?format=json&shared=";
 157         GetRequest<AccountResource> getAccount = new GetRequest<AccountResource>(AccountResource.class, app.getApiPath(), app.getUsername(), path) {
 158             @Override
 159             public void onSuccess(final AccountResource _result) {
 160                 Iterator<Folder> iter = _result.getContainers().listIterator();
 161                 fetchFolder(iter, new Command() {
 162
 163                                         @Override
 164                                         public void execute() {
 165                                                 firstLevelDataProvider.getList().clear();
 166                                 Folder t = null;
 167                                 for (Folder c : _result.getContainers()) {
 168                                         if (c.isHome())
 169                                                 firstLevelDataProvider.getList().add(0, c); //Pithos is always first
 170                                         else if (!c.isTrash())
 171                                                 firstLevelDataProvider.getList().add(c);
 172                                 }
 173                                                 if (callback != null)
 174                                                         callback.execute();
 175                                         }
 176                                 });
 177             }
 178
 179             @Override
 180             public void onError(Throwable t) {
 181                 GWT.log("Error getting account", t);
 182                                 app.setError(t);
 183                 if (t instanceof RestException)
 184                     app.displayError("Error getting account: " + ((RestException) t).getHttpStatusText());
 185                 else
 186                     app.displayError("System error fetching user data: " + t.getMessage());
 187             }
 188
 189                         @Override
 190                         protected void onUnauthorized(Response response) {
 191                                 app.sessionExpired();
 192                         }
 193         };
 194         getAccount.setHeader("X-Auth-Token", app.getToken());
 195         Scheduler.get().scheduleDeferred(getAccount);
 196         }
 197
 198         @Override
 199     public boolean isLeaf(Object o) {
 200                 if (o == null)
 201                         return false;
 202                 else if (o instanceof Folder) {
 203             Folder f = (Folder) o;
 204             return f.getSubfolders().isEmpty();
 205         }
 206                 else {
 207                         return firstLevelDataProvider.getList().isEmpty();
 208                 }
 209     }
 210
 211         private native void log(String msg) /*-{
 212                 $wnd.console.log(msg);
 213         }-*/;
 214
 215     protected void fetchFolder(final Iterator<Folder> iter, final Command callback) {
 216         if (iter.hasNext()) {
 217             final Folder f = iter.next();
 218
 219             String path = "/" + f.getContainer() + "?format=json&shared=&delimiter=/&prefix=" + URL.encodeQueryString(f.getPrefix());
 220             GetRequest<Folder> getFolder = new GetRequest<Folder>(Folder.class, app.getApiPath(), f.getOwner(), path, f) {
 221                 @Override
 222                 public void onSuccess(Folder _result) {
 223                     fetchFolder(iter, callback);
 224                 }
 225
 226                 @Override
 227                 public void onError(Throwable t) {
 228                     GWT.log("Error getting folder", t);
 229                                         app.setError(t);
 230                     if (t instanceof RestException)
 231                         app.displayError("Error getting folder: " + ((RestException) t).getHttpStatusText());
 232                     else
 233                         app.displayError("System error fetching folder: " + t.getMessage());
 234                 }
 235
 236                                 @Override
 237                                 protected void onUnauthorized(Response response) {
 238                                         app.sessionExpired();
 239                                 }
 240             };
 241             getFolder.setHeader("X-Auth-Token", app.getToken());
 242             Scheduler.get().scheduleDeferred(getFolder);
 243         }
 244         else if (callback != null)
 245             callback.execute();
 246     }
 247
 248     public Folder getSelection() {
 249         return selectionModel.getSelectedObject();
 250     }
 251
 252     public void updateFolder(Folder folder, boolean showfiles) {
 253         if (dataProviderMap.get(folder) == null) {
 254             dataProviderMap.put(folder, new ListDataProvider<Folder>());
 255         }
 256         final ListDataProvider<Folder> dataProvider = dataProviderMap.get(folder);
 257         fetchFolder(folder, dataProvider, showfiles);
 258     }
 259
 260     public void fetchFolder(final Folder f, final ListDataProvider<Folder> dataProvider, final boolean showfiles) {
 261         String path = "/" + f.getContainer() + "?format=json&shared=&delimiter=/&prefix=" + URL.encodeQueryString(f.getPrefix());
 262         GetRequest<Folder> getFolder = new GetRequest<Folder>(Folder.class, app.getApiPath(), f.getOwner(), path, f) {
 263             @Override
 264             public void onSuccess(final Folder _result) {
 265                 if (showfiles)
 266                     app.showFiles(_result);
 267                 Iterator<Folder> iter = new ArrayList<Folder>(_result.getSubfolders()).listIterator();
 268                 fetchFolder(iter, new Command() {
 269                     @Override
 270                     public void execute() {
 271                         dataProvider.getList().clear();
 272                                 dataProvider.getList().addAll(_result.getSubfolders());
 273                         app.getMySharedTreeView().updateChildren(f);
 274                     }
 275                 });
 276             }
 277
 278             @Override
 279             public void onError(Throwable t) {
 280                 GWT.log("Error getting folder", t);
 281                                 app.setError(t);
 282                 if (t instanceof RestException)
 283                     app.displayError("Error getting folder: " + ((RestException) t).getHttpStatusText());
 284                 else
 285                     app.displayError("System error fetching folder: " + t.getMessage());
 286             }
 287
 288                         @Override
 289                         protected void onUnauthorized(Response response) {
 290                                 app.sessionExpired();
 291                         }
 292         };
 293         getFolder.setHeader("X-Auth-Token", app.getToken());
 294         Scheduler.get().scheduleDeferred(getFolder);
 295     }
 296
 297         public void initialize(Command callback) {
 298                 fetchSharedContainers(callback);
 299         }
 300 }