code.grnet.gr Git - pithos-web-client/blob - src/gr/grnet/pithos/web/client/othersharedtree/OtherSharedTreeViewModel.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.othersharedtree;
  37
  38 import gr.grnet.pithos.web.client.FolderContextMenu;
  39 import gr.grnet.pithos.web.client.Pithos;
  40 import gr.grnet.pithos.web.client.SharingUsers;
  41 import gr.grnet.pithos.web.client.foldertree.AccountResource;
  42 import gr.grnet.pithos.web.client.foldertree.File;
  43 import gr.grnet.pithos.web.client.foldertree.Folder;
  44 import gr.grnet.pithos.web.client.mysharedtree.MysharedTreeView;
  45 import gr.grnet.pithos.web.client.othersharedtree.OtherSharedTreeView.Templates;
  46 import gr.grnet.pithos.web.client.rest.GetRequest;
  47 import gr.grnet.pithos.web.client.rest.RestException;
  48
  49 import java.util.HashMap;
  50 import java.util.HashSet;
  51 import java.util.Iterator;
  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 OtherSharedTreeViewModel implements TreeViewModel {
  76
  77     protected Pithos app;
  78
  79     String dummy = "No shares by others yet";
  80
  81     private Cell<Folder> folderCell = new AbstractCell<Folder>(ContextMenuEvent.getType().getName()) {
  82
  83        @Override
  84         public void render(Context context, Folder folder, SafeHtmlBuilder safeHtmlBuilder) {
  85             String html = AbstractImagePrototype.create(OtherSharedTreeView.images.folderYellow()).getHTML();
  86                 safeHtmlBuilder.appendHtmlConstant(html).appendHtmlConstant("&nbsp;");
  87             safeHtmlBuilder.append(Templates.INSTANCE.nameSpan(folder.getName()));
  88         }
  89
  90         @Override
  91         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) {
  92             if (event.getType().equals(ContextMenuEvent.getType().getName())) {
  93                 final int x = event.getClientX();
  94                 final int y = event.getClientY();
  95                 OtherSharedTreeViewModel.this.selectionModel.setSelected(folder, true);
  96                 app.scheduleFolderHeadCommand(folder, new Command() {
  97
  98                                         @Override
  99                                         public void execute() {
 100                                 FolderContextMenu menu = new FolderContextMenu(app, OtherSharedTreeView.images, app.getSelectedTree(), folder);
 101                                 menu.setPopupPosition(x, y);
 102                                 menu.show();
 103                                         }
 104                                 });
 105             }
 106         }
 107     };
 108
 109     protected ListDataProvider<String> userLevelDataProvider = new ListDataProvider<String>();
 110
 111     protected Map<String, ListDataProvider<Folder>> userDataProviderMap = new HashMap<String, ListDataProvider<Folder>>();
 112     private Map<Folder, ListDataProvider<Folder>> dataProviderMap = new HashMap<Folder, ListDataProvider<Folder>>();
 113
 114     protected SingleSelectionModel<Folder> selectionModel;
 115
 116     public OtherSharedTreeViewModel(Pithos _app, SingleSelectionModel<Folder> selectionModel) {
 117         app = _app;
 118         this.selectionModel = selectionModel;
 119     }
 120
 121     @Override
 122     public <T> NodeInfo<?> getNodeInfo(T value) {
 123         if (value == null) {
 124                 fetchSharingUsers(null);
 125             return new DefaultNodeInfo<String>(userLevelDataProvider, new TextCell(new SafeHtmlRenderer<String>() {
 126
 127                                 @Override
 128                                 public SafeHtml render(String object) {
 129                     SafeHtmlBuilder builder = new SafeHtmlBuilder();
 130                     render(object, builder);
 131                     return builder.toSafeHtml();
 132                                 }
 133
 134                                 @Override
 135                                 public void render(String object, SafeHtmlBuilder builder) {
 136                     if (!object.equals(dummy)) {
 137                         String html = AbstractImagePrototype.create(OtherSharedTreeView.images.myShared()).getHTML();
 138                         builder.appendHtmlConstant(html).appendHtmlConstant("&nbsp;");
 139                     }
 140                     builder.append(OtherSharedTreeView.Templates.INSTANCE.nameSpan(object));
 141                                 }
 142                         }), null, null);
 143         }
 144         else if (value instanceof String) {
 145                         String username = (String) value;
 146                         if (userDataProviderMap.get(username) == null) {
 147                                 userDataProviderMap.put(username, new ListDataProvider<Folder>());
 148                         }
 149                         final ListDataProvider<Folder> dataProvider = userDataProviderMap.get(username);
 150                         fetchSharedContainers(username, dataProvider, null);
 151                         return new DefaultNodeInfo<Folder>(dataProvider, folderCell, selectionModel, null);
 152         }
 153         else {
 154             final Folder f = (Folder) value;
 155             if (dataProviderMap.get(f) == null) {
 156                 dataProviderMap.put(f, new ListDataProvider<Folder>());
 157             }
 158             final ListDataProvider<Folder> dataProvider = dataProviderMap.get(f);
 159             fetchFolder(f, dataProvider, false, null);
 160             return new DefaultNodeInfo<Folder>(dataProvider, folderCell, selectionModel, null);
 161         }
 162     }
 163
 164     private void fetchSharingUsers(final Command callback) {
 165         GetRequest<SharingUsers> getSharingUsers = new GetRequest<SharingUsers>(SharingUsers.class, app.getApiPath(), "", "?format=json") {
 166             @Override
 167             public void onSuccess(final SharingUsers _result) {
 168                 userLevelDataProvider.getList().clear();
 169                 userLevelDataProvider.getList().addAll(_result.getUsers());
 170                 if (userLevelDataProvider.getList().isEmpty())
 171                         userLevelDataProvider.getList().add(dummy);
 172                 Iterator<String> iter = _result.getUsers().iterator();
 173                 fetchSharedContainers(iter, callback);
 174             }
 175
 176             @Override
 177             public void onError(Throwable t) {
 178                 GWT.log("Error getting folder", t);
 179                                 app.setError(t);
 180                 if (t instanceof RestException)
 181                     app.displayError("Error getting folder: " + ((RestException) t).getHttpStatusText());
 182                 else
 183                     app.displayError("System error fetching folder: " + t.getMessage());
 184             }
 185
 186                         @Override
 187                         protected void onUnauthorized(Response response) {
 188                                 app.sessionExpired();
 189                         }
 190         };
 191         getSharingUsers.setHeader("X-Auth-Token", app.getToken());
 192         Scheduler.get().scheduleDeferred(getSharingUsers);
 193         }
 194
 195         protected void fetchSharedContainers(final Iterator<String> iter, final Command callback) {
 196                 if (iter.hasNext()) {
 197                         String username = iter.next();
 198                         if (userDataProviderMap.get(username) == null) {
 199                                 userDataProviderMap.put(username, new ListDataProvider<Folder>());
 200                         }
 201                         final ListDataProvider<Folder> dataProvider = userDataProviderMap.get(username);
 202                         fetchSharedContainers(username, dataProvider, new Command() {
 203
 204                                 @Override
 205                                 public void execute() {
 206                                         fetchSharedContainers(iter, callback);
 207
 208                                 }
 209                         });
 210                 }
 211                 else
 212                         if (callback != null)
 213                                 callback.execute();
 214         }
 215
 216         @Override
 217     public boolean isLeaf(Object o) {
 218                 if (o == null)
 219                         return userLevelDataProvider.getList().isEmpty();
 220                 else if (o instanceof Folder) {
 221             Folder f = (Folder) o;
 222             return f.getSubfolders().isEmpty();
 223         }
 224                 else {
 225                         ListDataProvider<Folder> dp = userDataProviderMap.get(o);
 226                         if (dp != null)
 227                                 return dp.getList().isEmpty();
 228                         return true;
 229                 }
 230     }
 231
 232         private void fetchSharedContainers(final String username, final ListDataProvider<Folder> dataProvider, final Command callback) {
 233                 GetRequest<AccountResource> getUserSharedContainers = new GetRequest<AccountResource>(AccountResource.class, app.getApiPath(), username, "?format=json") {
 234
 235                         @Override
 236                         public void onSuccess(AccountResource _result) {
 237                         final ListDataProvider<Folder> tempProvider = new ListDataProvider<Folder>();
 238                                 Iterator<Folder> iter = _result.getContainers().iterator();
 239                                 fetchFolder(username, iter, tempProvider, new Command() {
 240
 241                                         @Override
 242                                         public void execute() {
 243                                                 dataProvider.getList().clear();
 244                                                 dataProvider.getList().addAll(tempProvider.getList());
 245                                                 if (callback != null)
 246                                                         callback.execute();
 247                                         }
 248                                 });
 249                         }
 250
 251                         @Override
 252                         public void onError(Throwable t) {
 253                 GWT.log("Error getting account", t);
 254                                 app.setError(t);
 255                 if (t instanceof RestException)
 256                     app.displayError("Error getting account: " + ((RestException) t).getHttpStatusText());
 257                 else
 258                     app.displayError("System error fetching user data: " + t.getMessage());
 259                         }
 260
 261                         @Override
 262                         protected void onUnauthorized(Response response) {
 263                                 app.sessionExpired();
 264                         }
 265                 };
 266                 getUserSharedContainers.setHeader("X-Auth-Token", app.getToken());
 267                 Scheduler.get().scheduleDeferred(getUserSharedContainers);
 268         }
 269
 270         protected void fetchFolder(final String username, final Iterator<Folder> iter, final ListDataProvider<Folder> dataProvider, final Command callback) {
 271         if (iter.hasNext()) {
 272             final Folder f = iter.next();
 273
 274             String path = "/" + f.getContainer() + "?format=json&delimiter=/&prefix=" + URL.encodeQueryString(f.getPrefix());
 275             GetRequest<Folder> getFolder = new GetRequest<Folder>(Folder.class, app.getApiPath(), username, path, f) {
 276                 @Override
 277                 public void onSuccess(Folder _result) {
 278                         dataProvider.getList().add(_result);
 279                     fetchFolder(username, iter, dataProvider, callback);
 280                 }
 281
 282                 @Override
 283                 public void onError(Throwable t) {
 284                     GWT.log("Error getting folder", t);
 285                                         app.setError(t);
 286                     if (t instanceof RestException)
 287                         app.displayError("Error getting folder: " + ((RestException) t).getHttpStatusText());
 288                     else
 289                         app.displayError("System error fetching folder: " + t.getMessage());
 290                 }
 291
 292                                 @Override
 293                                 protected void onUnauthorized(Response response) {
 294                                         app.sessionExpired();
 295                                 }
 296             };
 297             getFolder.setHeader("X-Auth-Token", app.getToken());
 298             Scheduler.get().scheduleDeferred(getFolder);
 299         }
 300         else if (callback != null)
 301             callback.execute();
 302     }
 303
 304     public Folder getSelection() {
 305         return selectionModel.getSelectedObject();
 306     }
 307
 308     public void updateFolder(Folder folder, boolean showfiles, Command callback) {
 309         if (dataProviderMap.get(folder) == null) {
 310             dataProviderMap.put(folder, new ListDataProvider<Folder>());
 311         }
 312         final ListDataProvider<Folder> dataProvider = dataProviderMap.get(folder);
 313         fetchFolder(folder, dataProvider, showfiles, callback);
 314     }
 315
 316     public void fetchFolder(final Folder f, final ListDataProvider<Folder> dataProvider, final boolean showfiles, final Command callback) {
 317         String path = "/" + f.getContainer() + "?format=json&delimiter=/&prefix=" + URL.encodeQueryString(f.getPrefix());
 318         GetRequest<Folder> getFolder = new GetRequest<Folder>(Folder.class, app.getApiPath(), f.getOwner(), path, f) {
 319             @Override
 320             public void onSuccess(final Folder _result) {
 321                 if (showfiles)
 322                     app.showFiles(_result);
 323                 Iterator<Folder> iter = _result.getSubfolders().iterator();
 324                 fetchFolder(_result.getOwner(), iter, dataProvider, new Command() {
 325                     @Override
 326                     public void execute() {
 327                         dataProvider.getList().clear();
 328                         dataProvider.getList().addAll(_result.getSubfolders());
 329                         app.getOtherSharedTreeView().updateChildren(f);
 330                         if (callback != null)
 331                                 callback.execute();
 332                     }
 333                 });
 334             }
 335
 336             @Override
 337             public void onError(Throwable t) {
 338                 GWT.log("Error getting folder", t);
 339                                 app.setError(t);
 340                 if (t instanceof RestException)
 341                     app.displayError("Error getting folder: " + ((RestException) t).getHttpStatusText());
 342                 else
 343                     app.displayError("System error fetching folder: " + t.getMessage());
 344             }
 345
 346                         @Override
 347                         protected void onUnauthorized(Response response) {
 348                                 app.sessionExpired();
 349                         }
 350         };
 351         getFolder.setHeader("X-Auth-Token", app.getToken());
 352         Scheduler.get().scheduleDeferred(getFolder);
 353     }
 354
 355     public void initialize(Command callback) {
 356         fetchSharingUsers(callback);
 357     }
 358 }