code.grnet.gr Git - pithos-web-client/blob - src/gr/grnet/pithos/web/client/Pithos.java

   1 /*
   2  * Copyright 2011-2013 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 package gr.grnet.pithos.web.client;
  36
  37 import com.google.gwt.core.client.EntryPoint;
  38 import com.google.gwt.core.client.GWT;
  39 import com.google.gwt.core.client.JsArrayString;
  40 import com.google.gwt.core.client.Scheduler;
  41 import com.google.gwt.core.client.Scheduler.RepeatingCommand;
  42 import com.google.gwt.core.client.Scheduler.ScheduledCommand;
  43 import com.google.gwt.event.dom.client.ClickEvent;
  44 import com.google.gwt.event.dom.client.ClickHandler;
  45 import com.google.gwt.event.logical.shared.ResizeEvent;
  46 import com.google.gwt.event.logical.shared.ResizeHandler;
  47 import com.google.gwt.http.client.Response;
  48 import com.google.gwt.http.client.URL;
  49 import com.google.gwt.i18n.client.DateTimeFormat;
  50 import com.google.gwt.i18n.client.Dictionary;
  51 import com.google.gwt.i18n.client.TimeZone;
  52 import com.google.gwt.resources.client.ClientBundle;
  53 import com.google.gwt.resources.client.CssResource;
  54 import com.google.gwt.resources.client.ImageResource;
  55 import com.google.gwt.resources.client.ImageResource.ImageOptions;
  56 import com.google.gwt.user.client.*;
  57 import com.google.gwt.user.client.ui.*;
  58 import com.google.gwt.view.client.SelectionChangeEvent;
  59 import com.google.gwt.view.client.SelectionChangeEvent.Handler;
  60 import com.google.gwt.view.client.SingleSelectionModel;
  61 import gr.grnet.pithos.web.client.catalog.UpdateUserCatalogs;
  62 import gr.grnet.pithos.web.client.catalog.UserCatalogs;
  63 import gr.grnet.pithos.web.client.commands.UploadFileCommand;
  64 import gr.grnet.pithos.web.client.foldertree.*;
  65 import gr.grnet.pithos.web.client.grouptree.Group;
  66 import gr.grnet.pithos.web.client.grouptree.GroupTreeView;
  67 import gr.grnet.pithos.web.client.grouptree.GroupTreeViewModel;
  68 import gr.grnet.pithos.web.client.mysharedtree.MysharedTreeView;
  69 import gr.grnet.pithos.web.client.mysharedtree.MysharedTreeViewModel;
  70 import gr.grnet.pithos.web.client.othersharedtree.OtherSharedTreeView;
  71 import gr.grnet.pithos.web.client.othersharedtree.OtherSharedTreeViewModel;
  72 import gr.grnet.pithos.web.client.rest.*;
  73 import org.apache.http.HttpStatus;
  74
  75 import java.util.*;
  76
  77 /**
  78  * Entry point classes define <code>onModuleLoad()</code>.
  79  */
  80 public class Pithos implements EntryPoint, ResizeHandler {
  81
  82     public static final Configuration config = GWT.create(Configuration.class);
  83
  84     public interface Style extends CssResource {
  85         String commandAnchor();
  86
  87         String statistics();
  88
  89         @ClassName("gwt-HTML")
  90         String html();
  91
  92         String uploadAlert();
  93
  94         String uploadAlertLink();
  95
  96         String uploadAlertProgress();
  97
  98         String uploadAlertPercent();
  99
 100         String uploadAlertClose();
 101     }
 102
 103     public interface Resources extends ClientBundle {
 104         @Source("Pithos.css")
 105         Style pithosCss();
 106
 107         @Source("gr/grnet/pithos/resources/close-popup.png")
 108         ImageResource closePopup();
 109     }
 110
 111     public static Resources resources = GWT.create(Resources.class);
 112
 113     /**
 114      * Instantiate an application-level image bundle. This object will provide
 115      * programmatic access to all the images needed by widgets.
 116      */
 117     static Images images = (Images) GWT.create(Images.class);
 118
 119     public String getUserID() {
 120         return userID;
 121     }
 122
 123     public UserCatalogs getUserCatalogs() {
 124         return userCatalogs;
 125     }
 126
 127     public String getCurrentUserDisplayNameOrID() {
 128         final String displayName = userCatalogs.getDisplayName(getUserID());
 129         return displayName == null ? getUserID() : displayName;
 130     }
 131
 132     public boolean hasDisplayNameForUserID(String userID) {
 133         return userCatalogs.getDisplayName(userID) != null;
 134     }
 135
 136     public boolean hasIDForUserDisplayName(String userDisplayName) {
 137         return userCatalogs.getID(userDisplayName) != null;
 138     }
 139
 140     public String getDisplayNameForUserID(String userID) {
 141         return userCatalogs.getDisplayName(userID);
 142     }
 143
 144     public String getIDForUserDisplayName(String userDisplayName) {
 145         return userCatalogs.getID(userDisplayName);
 146     }
 147
 148     public List<String> getDisplayNamesForUserIDs(List<String> userIDs) {
 149         if(userIDs == null) {
 150             userIDs = new ArrayList<String>();
 151         }
 152         final List<String> userDisplayNames = new ArrayList<String>();
 153         for(String userID : userIDs) {
 154             final String displayName = getDisplayNameForUserID(userID);
 155             userDisplayNames.add(displayName);
 156         }
 157
 158         return userDisplayNames;
 159     }
 160
 161     public List<String> filterUserIDsWithUnknownDisplayName(Collection<String> userIDs) {
 162         if(userIDs == null) {
 163             userIDs = new ArrayList<String>();
 164         }
 165         final List<String> filtered = new ArrayList<String>();
 166         for(String userID : userIDs) {
 167             if(!this.userCatalogs.hasID(userID)) {
 168                 filtered.add(userID);
 169             }
 170         }
 171         return filtered;
 172     }
 173
 174     public void setAccount(AccountResource acct) {
 175         account = acct;
 176     }
 177
 178     public AccountResource getAccount() {
 179         return account;
 180     }
 181
 182     public void updateFolder(Folder f, boolean showfiles, Command callback, final boolean openParent) {
 183         folderTreeView.updateFolder(f, showfiles, callback, openParent);
 184     }
 185
 186     public void updateGroupNode(Group group) {
 187         groupTreeView.updateGroupNode(group);
 188     }
 189
 190     public void updateMySharedRoot() {
 191         mysharedTreeView.updateRoot();
 192     }
 193
 194     public void updateSharedFolder(Folder f, boolean showfiles, Command callback) {
 195         mysharedTreeView.updateFolder(f, showfiles, callback);
 196     }
 197
 198     public void updateSharedFolder(Folder f, boolean showfiles) {
 199         updateSharedFolder(f, showfiles, null);
 200     }
 201
 202     public void updateOtherSharedFolder(Folder f, boolean showfiles, Command callback) {
 203         otherSharedTreeView.updateFolder(f, showfiles, callback);
 204     }
 205
 206     public MysharedTreeView getMySharedTreeView() {
 207         return mysharedTreeView;
 208     }
 209
 210     /**
 211      * An aggregate image bundle that pulls together all the images for this
 212      * application into a single bundle.
 213      */
 214     public interface Images extends TopPanel.Images, FileList.Images, ToolsMenu.Images {
 215
 216         @Source("gr/grnet/pithos/resources/document.png")
 217         ImageResource folders();
 218
 219         @Source("gr/grnet/pithos/resources/advancedsettings.png")
 220         @ImageOptions(width = 32, height = 32)
 221         ImageResource tools();
 222     }
 223
 224     private Throwable error;
 225
 226     /**
 227      * The Application Clipboard implementation;
 228      */
 229     private Clipboard clipboard = new Clipboard();
 230
 231     /**
 232      * The top panel that contains the menu bar.
 233      */
 234     private TopPanel topPanel;
 235
 236     /**
 237      * The panel that contains the various system messages.
 238      */
 239     private MessagePanel messagePanel = new MessagePanel(this, Pithos.images);
 240
 241     /**
 242      * The bottom panel that contains the status bar.
 243      */
 244     StatusPanel statusPanel = null;
 245
 246     /**
 247      * The file list widget.
 248      */
 249     private FileList fileList;
 250
 251     /**
 252      * The tab panel that occupies the right side of the screen.
 253      */
 254     private VerticalPanel inner = new VerticalPanel();
 255
 256
 257     /**
 258      * The split panel that will contain the left and right panels.
 259      */
 260     private HorizontalSplitPanel splitPanel = new HorizontalSplitPanel();
 261
 262     /**
 263      * The currently selected item in the application, for use by the Edit menu
 264      * commands. Potential types are Folder, File, User and Group.
 265      */
 266     private Object currentSelection;
 267
 268     public HashMap<String, String> userFullNameMap = new HashMap<String, String>();
 269
 270     /**
 271      * The ID that uniquely identifies the user in Pithos+.
 272      * Currently this is a UUID. It used to be the user's email.
 273      */
 274     private String userID = null;
 275
 276     /**
 277      * Hold mappings from user UUIDs to emails and vice-versa.
 278      */
 279     private UserCatalogs userCatalogs = new UserCatalogs();
 280
 281     /**
 282      * The authentication token of the current user.
 283      */
 284     private String userToken;
 285
 286     VerticalPanel trees;
 287
 288     SingleSelectionModel<Folder> folderTreeSelectionModel;
 289     FolderTreeViewModel folderTreeViewModel;
 290     FolderTreeView folderTreeView;
 291
 292     SingleSelectionModel<Folder> mysharedTreeSelectionModel;
 293     MysharedTreeViewModel mysharedTreeViewModel;
 294     MysharedTreeView mysharedTreeView = null;
 295
 296     protected SingleSelectionModel<Folder> otherSharedTreeSelectionModel;
 297     OtherSharedTreeViewModel otherSharedTreeViewModel;
 298     OtherSharedTreeView otherSharedTreeView = null;
 299
 300     GroupTreeViewModel groupTreeViewModel;
 301     GroupTreeView groupTreeView;
 302
 303     TreeView selectedTree;
 304     protected AccountResource account;
 305
 306     Folder trash;
 307
 308     List<Composite> treeViews = new ArrayList<Composite>();
 309
 310     @SuppressWarnings("rawtypes")
 311     List<SingleSelectionModel> selectionModels = new ArrayList<SingleSelectionModel>();
 312
 313     public Button upload;
 314
 315     private HTML numOfFiles;
 316
 317     private Toolbar toolbar;
 318
 319     private FileUploadDialog fileUploadDialog = new FileUploadDialog(this);
 320
 321     UploadAlert uploadAlert;
 322
 323     Date lastModified;
 324
 325     @Override
 326     public void onModuleLoad() {
 327         if(parseUserCredentials()) {
 328             initialize();
 329         }
 330     }
 331
 332     static native void __ConsoleLog(String message) /*-{
 333       try {
 334         console.log(message);
 335       } catch (e) {
 336       }
 337     }-*/;
 338
 339     public static void LOG(Object ...args) {
 340         if(false) {
 341             final StringBuilder sb = new StringBuilder();
 342             for(Object arg : args) {
 343                 if(arg instanceof Throwable) {
 344                     final Throwable error = (Throwable) arg;
 345                     sb.append("\nException: [" + error.toString().replace("\n", "\n  ") + "]");
 346                     Throwable cause = error.getCause();
 347                     if(cause != null) {
 348                         sb.append("\nCauses:\n");
 349                         while(cause != null) {
 350                             sb.append("  ");
 351                             sb.append("[" + cause.toString().replace("\n", "\n  ")  + "]");
 352                             sb.append("\n");
 353                             cause = cause.getCause();
 354                         }
 355                     }
 356                     else {
 357                         sb.append("\n");
 358                     }
 359
 360                     StackTraceElement[] stackTrace = error.getStackTrace();
 361                     sb.append("Stack trace (" + stackTrace.length + " elements):\n");
 362                     for(int i = 0; i < stackTrace.length; i++) {
 363                         StackTraceElement errorElem = stackTrace[i];
 364                         sb.append("  [" + i + "] ");
 365                         sb.append(errorElem.toString());
 366                         sb.append("\n");
 367                     }
 368                 }
 369                 else {
 370                     sb.append(arg);
 371                 }
 372             }
 373
 374
 375             if(sb.length() > 0) {
 376                 __ConsoleLog(sb.toString());
 377             }
 378         }
 379     }
 380
 381     private void initialize() {
 382         lastModified = new Date(); //Initialize if-modified-since value with now.
 383         resources.pithosCss().ensureInjected();
 384         boolean bareContent = Window.Location.getParameter("noframe") != null;
 385         String contentWidth = bareContent ? Const.PERCENT_100 : "75%";
 386
 387         VerticalPanel outer = new VerticalPanel();
 388         outer.setWidth(Const.PERCENT_100);
 389         if(!bareContent) {
 390             outer.addStyleName("pithos-outer");
 391         }
 392
 393         if(!bareContent) {
 394             topPanel = new TopPanel(this, Pithos.images);
 395             topPanel.setWidth(Const.PERCENT_100);
 396             outer.add(topPanel);
 397             outer.setCellHorizontalAlignment(topPanel, HasHorizontalAlignment.ALIGN_CENTER);
 398         }
 399
 400         messagePanel.setVisible(false);
 401         outer.add(messagePanel);
 402         outer.setCellHorizontalAlignment(messagePanel, HasHorizontalAlignment.ALIGN_CENTER);
 403         outer.setCellVerticalAlignment(messagePanel, HasVerticalAlignment.ALIGN_MIDDLE);
 404
 405         HorizontalPanel header = new HorizontalPanel();
 406         header.addStyleName("pithos-header");
 407         header.setWidth(contentWidth);
 408         if(bareContent) {
 409             header.addStyleName("pithos-header-noframe");
 410         }
 411         upload = new Button("Upload", new ClickHandler() {
 412             @Override
 413             public void onClick(ClickEvent event) {
 414                 if(getSelection() != null) {
 415                     new UploadFileCommand(Pithos.this, null, getSelection()).execute();
 416                 }
 417             }
 418         });
 419         upload.addStyleName("pithos-uploadButton");
 420         header.add(upload);
 421         header.setCellHorizontalAlignment(upload, HasHorizontalAlignment.ALIGN_LEFT);
 422         header.setCellVerticalAlignment(upload, HasVerticalAlignment.ALIGN_MIDDLE);
 423
 424         toolbar = new Toolbar(this);
 425         header.add(toolbar);
 426         header.setCellHorizontalAlignment(toolbar, HasHorizontalAlignment.ALIGN_CENTER);
 427         header.setCellVerticalAlignment(toolbar, HasVerticalAlignment.ALIGN_MIDDLE);
 428
 429         HorizontalPanel folderStatistics = new HorizontalPanel();
 430         folderStatistics.addStyleName("pithos-folderStatistics");
 431         numOfFiles = new HTML();
 432         folderStatistics.add(numOfFiles);
 433         folderStatistics.setCellVerticalAlignment(numOfFiles, HasVerticalAlignment.ALIGN_MIDDLE);
 434         HTML numOfFilesLabel = new HTML("&nbsp;Files");
 435         folderStatistics.add(numOfFilesLabel);
 436         folderStatistics.setCellVerticalAlignment(numOfFilesLabel, HasVerticalAlignment.ALIGN_MIDDLE);
 437         header.add(folderStatistics);
 438         header.setCellHorizontalAlignment(folderStatistics, HasHorizontalAlignment.ALIGN_RIGHT);
 439         header.setCellVerticalAlignment(folderStatistics, HasVerticalAlignment.ALIGN_MIDDLE);
 440         header.setCellWidth(folderStatistics, "40px");
 441         outer.add(header);
 442         outer.setCellHorizontalAlignment(header, HasHorizontalAlignment.ALIGN_CENTER);
 443         // Inner contains the various lists
 444         inner.sinkEvents(Event.ONCONTEXTMENU);
 445         inner.setWidth(Const.PERCENT_100);
 446
 447         folderTreeSelectionModel = new SingleSelectionModel<Folder>();
 448         folderTreeSelectionModel.addSelectionChangeHandler(new SelectionChangeEvent.Handler() {
 449             @Override
 450             public void onSelectionChange(SelectionChangeEvent event) {
 451                 if(folderTreeSelectionModel.getSelectedObject() != null) {
 452                     deselectOthers(folderTreeView, folderTreeSelectionModel);
 453                     applyPermissions(folderTreeSelectionModel.getSelectedObject());
 454                     Folder f = folderTreeSelectionModel.getSelectedObject();
 455                     updateFolder(f, true, new Command() {
 456
 457                         @Override
 458                         public void execute() {
 459                             updateStatistics();
 460                         }
 461                     }, true);
 462                     showRelevantToolbarButtons();
 463                 }
 464                 else {
 465                     if(getSelectedTree().equals(folderTreeView)) {
 466                         setSelectedTree(null);
 467                     }
 468                     if(getSelectedTree() == null) {
 469                         showRelevantToolbarButtons();
 470                     }
 471                 }
 472             }
 473         });
 474         selectionModels.add(folderTreeSelectionModel);
 475
 476         folderTreeViewModel = new FolderTreeViewModel(this, folderTreeSelectionModel);
 477         folderTreeView = new FolderTreeView(folderTreeViewModel);
 478         treeViews.add(folderTreeView);
 479
 480         fileList = new FileList(this, images);
 481         inner.add(fileList);
 482
 483         trees = new VerticalPanel();
 484         trees.setWidth(Const.PERCENT_100);
 485
 486         // Add the left and right panels to the split panel.
 487         splitPanel.setLeftWidget(trees);
 488         FlowPanel right = new FlowPanel();
 489         right.getElement().setId("rightPanel");
 490         right.add(inner);
 491         splitPanel.setRightWidget(right);
 492         splitPanel.setSplitPosition("219px");
 493         splitPanel.setSize(Const.PERCENT_100, Const.PERCENT_100);
 494         splitPanel.addStyleName("pithos-splitPanel");
 495         splitPanel.setWidth(contentWidth);
 496         outer.add(splitPanel);
 497         outer.setCellHorizontalAlignment(splitPanel, HasHorizontalAlignment.ALIGN_CENTER);
 498
 499         if(!bareContent) {
 500             statusPanel = new StatusPanel();
 501             statusPanel.setWidth(Const.PERCENT_100);
 502             outer.add(statusPanel);
 503             outer.setCellHorizontalAlignment(statusPanel, HasHorizontalAlignment.ALIGN_CENTER);
 504         }
 505         else {
 506             splitPanel.addStyleName("pithos-splitPanel-noframe");
 507         }
 508
 509         // Hook the window resize event, so that we can adjust the UI.
 510         Window.addResizeHandler(this);
 511         // Clear out the window's built-in margin, because we want to take
 512         // advantage of the entire client area.
 513         Window.setMargin("0px");
 514         // Finally, add the outer panel to the RootPanel, so that it will be
 515         // displayed.
 516         RootPanel.get().add(outer);
 517         // Call the window resized handler to get the initial sizes setup. Doing
 518         // this in a deferred command causes it to occur after all widgets'
 519         // sizes have been computed by the browser.
 520         Scheduler.get().scheduleIncremental(new RepeatingCommand() {
 521
 522             @Override
 523             public boolean execute() {
 524                 if(!isCloudbarReady()) {
 525                     return true;
 526                 }
 527                 onWindowResized(Window.getClientHeight());
 528                 return false;
 529             }
 530         });
 531
 532         Scheduler.get().scheduleDeferred(new ScheduledCommand() {
 533             @Override
 534             public void execute() {
 535                 LOG("Pithos::initialize() Calling Pithos::fetchAccount()");
 536                 fetchAccount(new Command() {
 537
 538                     @Override
 539                     public void execute() {
 540                         if(!account.hasHomeContainer()) {
 541                             createHomeContainer(account, this);
 542                         }
 543                         else if(!account.hasTrashContainer()) {
 544                             createTrashContainer(this);
 545                         }
 546                         else {
 547                             for(Folder f : account.getContainers()) {
 548                                 if(f.getName().equals(Const.TRASH_CONTAINER)) {
 549                                     trash = f;
 550                                     break;
 551                                 }
 552                             }
 553                             trees.add(folderTreeView);
 554                             folderTreeViewModel.initialize(account, new Command() {
 555
 556                                 @Override
 557                                 public void execute() {
 558                                     createMySharedTree();
 559                                 }
 560                             });
 561
 562                             HorizontalPanel separator = new HorizontalPanel();
 563                             separator.addStyleName("pithos-statisticsSeparator");
 564                             separator.add(new HTML(""));
 565                             trees.add(separator);
 566
 567                             groupTreeViewModel = new GroupTreeViewModel(Pithos.this);
 568                             groupTreeView = new GroupTreeView(groupTreeViewModel);
 569                             treeViews.add(groupTreeView);
 570                             trees.add(groupTreeView);
 571                             folderTreeView.showStatistics(account);
 572                         }
 573                     }
 574                 });
 575             }
 576         });
 577     }
 578
 579     public void scheduleResfresh() {
 580         Scheduler.get().scheduleFixedDelay(new RepeatingCommand() {
 581
 582             @Override
 583             public boolean execute() {
 584                 final Folder f = getSelection();
 585                 if(f == null) {
 586                     return true;
 587                 }
 588
 589                 HeadRequest<Folder> head = new HeadRequest<Folder>(Folder.class, getApiPath(), f.getOwnerID(), "/" + f.getContainer()) {
 590
 591                     @Override
 592                     public void onSuccess(Folder _result) {
 593                         lastModified = new Date();
 594                         if(getSelectedTree().equals(folderTreeView)) {
 595                             updateFolder(f, true, new Command() {
 596
 597                                 @Override
 598                                 public void execute() {
 599                                     scheduleResfresh();
 600                                 }
 601
 602                             }, false);
 603                         }
 604                         else if(getSelectedTree().equals(mysharedTreeView)) {
 605                             updateSharedFolder(f, true, new Command() {
 606
 607                                 @Override
 608                                 public void execute() {
 609                                     scheduleResfresh();
 610                                 }
 611                             });
 612                         }
 613                         else {
 614                             scheduleResfresh();
 615                         }
 616                     }
 617
 618                     @Override
 619                     public void onError(Throwable t) {
 620                         if(t instanceof RestException && ((RestException) t).getHttpStatusCode() == HttpStatus.SC_NOT_MODIFIED) {
 621                             scheduleResfresh();
 622                         }
 623                         else if(retries >= MAX_RETRIES) {
 624                             LOG("Error heading folder. ", t);
 625                             setError(t);
 626                             if(t instanceof RestException) {
 627                                 displayError("Error heading folder: " + ((RestException) t).getHttpStatusText());
 628                             }
 629                             else {
 630                                 displayError("System error heading folder: " + t.getMessage());
 631                             }
 632                         }
 633                         else {//retry
 634                             LOG("Retry ", retries);
 635                             Scheduler.get().scheduleDeferred(this);
 636                         }
 637                     }
 638
 639                     @Override
 640                     protected void onUnauthorized(Response response) {
 641                         if(retries >= MAX_RETRIES) {
 642                             sessionExpired();
 643                         }
 644                         else //retry
 645                         {
 646                             Scheduler.get().scheduleDeferred(this);
 647                         }
 648                     }
 649                 };
 650                 head.setHeader(Const.X_AUTH_TOKEN, getUserToken());
 651                 head.setHeader(Const.IF_MODIFIED_SINCE, DateTimeFormat.getFormat(Const.DATE_FORMAT_1).format(lastModified, TimeZone.createTimeZone(0)) + " GMT");
 652                 Scheduler.get().scheduleDeferred(head);
 653
 654                 return false;
 655             }
 656         }, 3000);
 657     }
 658
 659     public void applyPermissions(Folder f) {
 660         if(f != null) {
 661             if(f.isInTrash()) {
 662                 upload.setEnabled(false);
 663                 disableUploadArea();
 664             }
 665             else {
 666                 Boolean[] perms = f.getPermissions().get(userID);
 667                 if(f.getOwnerID().equals(userID) || (perms != null && perms[1] != null && perms[1])) {
 668                     upload.setEnabled(true);
 669                     enableUploadArea();
 670                 }
 671                 else {
 672                     upload.setEnabled(false);
 673                     disableUploadArea();
 674                 }
 675             }
 676         }
 677         else {
 678             upload.setEnabled(false);
 679             disableUploadArea();
 680         }
 681     }
 682
 683     @SuppressWarnings({"rawtypes", "unchecked"})
 684     public void deselectOthers(TreeView _selectedTree, SingleSelectionModel model) {
 685         selectedTree = _selectedTree;
 686
 687         for(SingleSelectionModel s : selectionModels) {
 688             if(!s.equals(model) && s.getSelectedObject() != null) {
 689                 s.setSelected(s.getSelectedObject(), false);
 690             }
 691         }
 692     }
 693
 694     public void showFiles(final Folder f) {
 695         Set<File> files = f.getFiles();
 696         showFiles(files);
 697     }
 698
 699     public void showFiles(Set<File> files) {
 700         fileList.setFiles(new ArrayList<File>(files));
 701     }
 702
 703     /**
 704      * Parse and store the user credentials to the appropriate fields.
 705      */
 706     private boolean parseUserCredentials() {
 707         Configuration conf = (Configuration) GWT.create(Configuration.class);
 708         Dictionary otherProperties = Dictionary.getDictionary(Const.OTHER_PROPERTIES);
 709         String cookie = otherProperties.get(Const.AUTH_COOKIE);
 710         String auth = Cookies.getCookie(cookie);
 711         if(auth == null) {
 712             authenticateUser();
 713             return false;
 714         }
 715         if(auth.startsWith("\"")) {
 716             auth = auth.substring(1);
 717         }
 718         if(auth.endsWith("\"")) {
 719             auth = auth.substring(0, auth.length() - 1);
 720         }
 721         String[] authSplit = auth.split("\\" + conf.cookieSeparator(), 2);
 722         if(authSplit.length != 2) {
 723             authenticateUser();
 724             return false;
 725         }
 726         userID = authSplit[0];
 727         userToken = authSplit[1];
 728
 729         String gotoUrl = Window.Location.getParameter("goto");
 730         if(gotoUrl != null && gotoUrl.length() > 0) {
 731             Window.Location.assign(gotoUrl);
 732             return false;
 733         }
 734         return true;
 735     }
 736
 737     /**
 738      * Redirect the user to the login page for authentication.
 739      */
 740     protected void authenticateUser() {
 741         Dictionary otherProperties = Dictionary.getDictionary(Const.OTHER_PROPERTIES);
 742         Window.Location.assign(otherProperties.get(Const.LOGIN_URL) + Window.Location.getHref());
 743     }
 744
 745     public void fetchAccount(final Command callback) {
 746         String path = "?format=json";
 747
 748         GetRequest<AccountResource> getAccount = new GetRequest<AccountResource>(AccountResource.class, getApiPath(), userID, path) {
 749             @Override
 750             public void onSuccess(AccountResource accountResource) {
 751                 account = accountResource;
 752                 if(callback != null) {
 753                     callback.execute();
 754                 }
 755
 756                 final List<String> memberIDs = new ArrayList<String>();
 757                 final List<Group> groups = account.getGroups();
 758                 for(Group group : groups) {
 759                     memberIDs.addAll(group.getMemberIDs());
 760                 }
 761                 memberIDs.add(Pithos.this.getUserID());
 762
 763                 final List<String> theUnknown = Pithos.this.filterUserIDsWithUnknownDisplayName(memberIDs);
 764                 // Initialize the user catalog
 765                 new UpdateUserCatalogs(Pithos.this, theUnknown).scheduleDeferred();
 766                 LOG("Called new UpdateUserCatalogs(Pithos.this, theUnknown).scheduleDeferred();");
 767             }
 768
 769             @Override
 770             public void onError(Throwable t) {
 771                 LOG("Error getting account", t);
 772                 setError(t);
 773                 if(t instanceof RestException) {
 774                     displayError("Error getting account: " + ((RestException) t).getHttpStatusText());
 775                 }
 776                 else {
 777                     displayError("System error fetching user data: " + t.getMessage());
 778                 }
 779             }
 780
 781             @Override
 782             protected void onUnauthorized(Response response) {
 783                 sessionExpired();
 784             }
 785         };
 786         getAccount.setHeader(Const.X_AUTH_TOKEN, userToken);
 787         Scheduler.get().scheduleDeferred(getAccount);
 788     }
 789
 790     public void updateStatistics() {
 791         HeadRequest<AccountResource> headAccount = new HeadRequest<AccountResource>(AccountResource.class, getApiPath(), userID, "", account) {
 792
 793             @Override
 794             public void onSuccess(AccountResource _result) {
 795                 folderTreeView.showStatistics(account);
 796             }
 797
 798             @Override
 799             public void onError(Throwable t) {
 800                 LOG("Error getting account", t);
 801                 setError(t);
 802                 if(t instanceof RestException) {
 803                     displayError("Error getting account: " + ((RestException) t).getHttpStatusText());
 804                 }
 805                 else {
 806                     displayError("System error fetching user data: " + t.getMessage());
 807                 }
 808             }
 809
 810             @Override
 811             protected void onUnauthorized(Response response) {
 812                 sessionExpired();
 813             }
 814         };
 815         headAccount.setHeader(Const.X_AUTH_TOKEN, userToken);
 816         Scheduler.get().scheduleDeferred(headAccount);
 817     }
 818
 819     protected void createHomeContainer(final AccountResource _account, final Command callback) {
 820         String path = "/" + Const.HOME_CONTAINER;
 821         PutRequest createPithos = new PutRequest(getApiPath(), getUserID(), path) {
 822             @Override
 823             public void onSuccess(Resource result) {
 824                 if(!_account.hasTrashContainer()) {
 825                     createTrashContainer(callback);
 826                 }
 827                 else {
 828                     fetchAccount(callback);
 829                 }
 830             }
 831
 832             @Override
 833             public void onError(Throwable t) {
 834                 LOG("Error creating pithos", t);
 835                 setError(t);
 836                 if(t instanceof RestException) {
 837                     displayError("Error creating pithos: " + ((RestException) t).getHttpStatusText());
 838                 }
 839                 else {
 840                     displayError("System error Error creating pithos: " + t.getMessage());
 841                 }
 842             }
 843
 844             @Override
 845             protected void onUnauthorized(Response response) {
 846                 sessionExpired();
 847             }
 848         };
 849         createPithos.setHeader(Const.X_AUTH_TOKEN, getUserToken());
 850         Scheduler.get().scheduleDeferred(createPithos);
 851     }
 852
 853     protected void createTrashContainer(final Command callback) {
 854         String path = "/" + Const.TRASH_CONTAINER;
 855         PutRequest createPithos = new PutRequest(getApiPath(), getUserID(), path) {
 856             @Override
 857             public void onSuccess(Resource result) {
 858                 fetchAccount(callback);
 859             }
 860
 861             @Override
 862             public void onError(Throwable t) {
 863                 LOG("Error creating pithos", t);
 864                 setError(t);
 865                 if(t instanceof RestException) {
 866                     displayError("Error creating pithos: " + ((RestException) t).getHttpStatusText());
 867                 }
 868                 else {
 869                     displayError("System error Error creating pithos: " + t.getMessage());
 870                 }
 871             }
 872
 873             @Override
 874             protected void onUnauthorized(Response response) {
 875                 sessionExpired();
 876             }
 877         };
 878         createPithos.setHeader(Const.X_AUTH_TOKEN, getUserToken());
 879         Scheduler.get().scheduleDeferred(createPithos);
 880     }
 881
 882     /**
 883      * Creates an HTML fragment that places an image & caption together, for use
 884      * in a group header.
 885      *
 886      * @param imageProto an image prototype for an image
 887      * @param caption    the group caption
 888      * @return the header HTML fragment
 889      */
 890     private String createHeaderHTML(AbstractImagePrototype imageProto, String caption) {
 891         String captionHTML = "<table class='caption' cellpadding='0' "
 892             + "cellspacing='0'>" + "<tr><td class='lcaption'>" + imageProto.getHTML()
 893             + "</td><td id =" + caption + " class='rcaption'><b style='white-space:nowrap'>&nbsp;"
 894             + caption + "</b></td></tr></table>";
 895         return captionHTML;
 896     }
 897
 898     protected void onWindowResized(int height) {
 899         // Adjust the split panel to take up the available room in the window.
 900         int newHeight = height - splitPanel.getAbsoluteTop() - 153;
 901         if(newHeight < 1) {
 902             newHeight = 1;
 903         }
 904         splitPanel.setHeight("" + newHeight);
 905         inner.setHeight("" + newHeight);
 906     }
 907
 908     native boolean isCloudbarReady()/*-{
 909       if ($wnd.$("div.cloudbar") && $wnd.$("div.cloudbar").height() > 0)
 910         return true;
 911       return false;
 912     }-*/;
 913
 914     @Override
 915     public void onResize(ResizeEvent event) {
 916         int height = event.getHeight();
 917         onWindowResized(height);
 918     }
 919
 920     /**
 921      * Display an error message.
 922      *
 923      * @param msg the message to display
 924      */
 925     public void displayError(String msg) {
 926         messagePanel.displayError(msg);
 927         onWindowResized(Window.getClientHeight());
 928     }
 929
 930     /**
 931      * Display a warning message.
 932      *
 933      * @param msg the message to display
 934      */
 935     public void displayWarning(String msg) {
 936         messagePanel.displayWarning(msg);
 937         onWindowResized(Window.getClientHeight());
 938     }
 939
 940     /**
 941      * Display an informational message.
 942      *
 943      * @param msg the message to display
 944      */
 945     public void displayInformation(String msg) {
 946         messagePanel.displayInformation(msg);
 947         onWindowResized(Window.getClientHeight());
 948     }
 949
 950     /**
 951      * Retrieve the fileList.
 952      *
 953      * @return the fileList
 954      */
 955     public FileList getFileList() {
 956         return fileList;
 957     }
 958
 959     /**
 960      * Retrieve the topPanel.
 961      *
 962      * @return the topPanel
 963      */
 964     TopPanel getTopPanel() {
 965         return topPanel;
 966     }
 967
 968     /**
 969      * Retrieve the clipboard.
 970      *
 971      * @return the clipboard
 972      */
 973     public Clipboard getClipboard() {
 974         return clipboard;
 975     }
 976
 977     public StatusPanel getStatusPanel() {
 978         return statusPanel;
 979     }
 980
 981     public String getUserToken() {
 982         return userToken;
 983     }
 984
 985     public static native void preventIESelection() /*-{
 986       $doc.body.onselectstart = function () {
 987         return false;
 988       };
 989     }-*/;
 990
 991     public static native void enableIESelection() /*-{
 992       if ($doc.body.onselectstart != null)
 993         $doc.body.onselectstart = null;
 994     }-*/;
 995
 996     /**
 997      * @return the absolute path of the API root URL
 998      */
 999     public String getApiPath() {
1000         Configuration conf = (Configuration) GWT.create(Configuration.class);
1001         return conf.apiPath();
1002     }
1003
1004     /**
1005      * History support for folder navigation
1006      * adds a new browser history entry
1007      *
1008      * @param key
1009      */
1010     public void updateHistory(String key) {
1011 //              Replace any whitespace of the initial string to "+"
1012 //              String result = key.replaceAll("\\s","+");
1013 //              Add a new browser history entry.
1014 //              History.newItem(result);
1015         History.newItem(key);
1016     }
1017
1018     public void deleteFolder(final Folder folder, final Command callback) {
1019         final PleaseWaitPopup pwp = new PleaseWaitPopup();
1020         pwp.center();
1021         String path = "/" + folder.getContainer() + "/" + folder.getPrefix() + "?delimiter=/" + "&t=" + System.currentTimeMillis();
1022         DeleteRequest deleteFolder = new DeleteRequest(getApiPath(), folder.getOwnerID(), path) {
1023
1024             @Override
1025             protected void onUnauthorized(Response response) {
1026                 pwp.hide();
1027                 sessionExpired();
1028             }
1029
1030             @Override
1031             public void onSuccess(Resource result) {
1032                 updateFolder(folder.getParent(), true, new Command() {
1033
1034                     @Override
1035                     public void execute() {
1036                         folderTreeSelectionModel.setSelected(folder.getParent(), true);
1037                         updateStatistics();
1038                         if(callback != null) {
1039                             callback.execute();
1040                         }
1041                         pwp.hide();
1042                     }
1043                 }, true);
1044             }
1045
1046             @Override
1047             public void onError(Throwable t) {
1048                 LOG(t);
1049                 setError(t);
1050                 if(t instanceof RestException) {
1051                     if(((RestException) t).getHttpStatusCode() != Response.SC_NOT_FOUND) {
1052                         displayError("Unable to delete folder: " + ((RestException) t).getHttpStatusText());
1053                     }
1054                     else {
1055                         onSuccess(null);
1056                     }
1057                 }
1058                 else {
1059                     displayError("System error unable to delete folder: " + t.getMessage());
1060                 }
1061                 pwp.hide();
1062             }
1063         };
1064         deleteFolder.setHeader(Const.X_AUTH_TOKEN, getUserToken());
1065         Scheduler.get().scheduleDeferred(deleteFolder);
1066     }
1067
1068     public FolderTreeView getFolderTreeView() {
1069         return folderTreeView;
1070     }
1071
1072     public void copyFiles(final Iterator<File> iter, final String targetUsername, final String targetUri, final Command callback) {
1073         if(iter.hasNext()) {
1074             File file = iter.next();
1075             String path = targetUri + "/" + file.getName();
1076             PutRequest copyFile = new PutRequest(getApiPath(), targetUsername, path) {
1077                 @Override
1078                 public void onSuccess(Resource result) {
1079                     copyFiles(iter, targetUsername, targetUri, callback);
1080                 }
1081
1082                 @Override
1083                 public void onError(Throwable t) {
1084                     LOG(t);
1085                     setError(t);
1086                     if(t instanceof RestException) {
1087                         displayError("Unable to copy file: " + ((RestException) t).getHttpStatusText());
1088                     }
1089                     else {
1090                         displayError("System error unable to copy file: " + t.getMessage());
1091                     }
1092                 }
1093
1094                 @Override
1095                 protected void onUnauthorized(Response response) {
1096                     sessionExpired();
1097                 }
1098             };
1099             copyFile.setHeader(Const.X_AUTH_TOKEN, getUserToken());
1100             copyFile.setHeader(Const.X_COPY_FROM, URL.encodePathSegment(file.getUri()));
1101             if(!file.getOwnerID().equals(targetUsername)) {
1102                 copyFile.setHeader(Const.X_SOURCE_ACCOUNT, URL.encodePathSegment(file.getOwnerID()));
1103             }
1104             copyFile.setHeader(Const.CONTENT_TYPE, file.getContentType());
1105             Scheduler.get().scheduleDeferred(copyFile);
1106         }
1107         else if(callback != null) {
1108             callback.execute();
1109         }
1110     }
1111
1112     public void copyFolder(final Folder f, final String targetUsername, final String targetUri, boolean move, final Command callback) {
1113         String path = targetUri + "?delimiter=/";
1114         PutRequest copyFolder = new PutRequest(getApiPath(), targetUsername, path) {
1115             @Override
1116             public void onSuccess(Resource result) {
1117                 if(callback != null) {
1118                     callback.execute();
1119                 }
1120             }
1121
1122             @Override
1123             public void onError(Throwable t) {
1124                 LOG(t);
1125                 setError(t);
1126                 if(t instanceof RestException) {
1127                     displayError("Unable to copy folder: " + ((RestException) t).getHttpStatusText());
1128                 }
1129                 else {
1130                     displayError("System error copying folder: " + t.getMessage());
1131                 }
1132             }
1133
1134             @Override
1135             protected void onUnauthorized(Response response) {
1136                 sessionExpired();
1137             }
1138         };
1139         copyFolder.setHeader(Const.X_AUTH_TOKEN, getUserToken());
1140         copyFolder.setHeader(Const.ACCEPT, "*/*");
1141         copyFolder.setHeader(Const.CONTENT_LENGTH, "0");
1142         copyFolder.setHeader(Const.CONTENT_TYPE, "application/directory");
1143         if(!f.getOwnerID().equals(targetUsername)) {
1144             copyFolder.setHeader(Const.X_SOURCE_ACCOUNT, f.getOwnerID());
1145         }
1146         if(move) {
1147             copyFolder.setHeader(Const.X_MOVE_FROM, URL.encodePathSegment(f.getUri()));
1148         }
1149         else {
1150             copyFolder.setHeader(Const.X_COPY_FROM, URL.encodePathSegment(f.getUri()));
1151         }
1152         Scheduler.get().scheduleDeferred(copyFolder);
1153     }
1154
1155     public void addSelectionModel(@SuppressWarnings("rawtypes") SingleSelectionModel model) {
1156         selectionModels.add(model);
1157     }
1158
1159     public OtherSharedTreeView getOtherSharedTreeView() {
1160         return otherSharedTreeView;
1161     }
1162
1163     public void updateTrash(boolean showFiles, Command callback) {
1164         updateFolder(trash, showFiles, callback, true);
1165     }
1166
1167     public void updateGroupsNode() {
1168         groupTreeView.updateGroupNode(null);
1169     }
1170
1171     public Group addGroup(String groupname) {
1172         Group newGroup = new Group(groupname);
1173         account.addGroup(newGroup);
1174         groupTreeView.updateGroupNode(null);
1175         return newGroup;
1176     }
1177
1178     public void removeGroup(Group group) {
1179         account.removeGroup(group);
1180         updateGroupsNode();
1181     }
1182
1183     public TreeView getSelectedTree() {
1184         return selectedTree;
1185     }
1186
1187     public void setSelectedTree(TreeView selected) {
1188         selectedTree = selected;
1189     }
1190
1191     public Folder getSelection() {
1192         if(selectedTree != null) {
1193             return selectedTree.getSelection();
1194         }
1195         return null;
1196     }
1197
1198     public void showFolderStatistics(int folderFileCount) {
1199         numOfFiles.setHTML(String.valueOf(folderFileCount));
1200     }
1201
1202     public GroupTreeView getGroupTreeView() {
1203         return groupTreeView;
1204     }
1205
1206     public void sessionExpired() {
1207         new SessionExpiredDialog(this).center();
1208     }
1209
1210     public void updateRootFolder(Command callback) {
1211         updateFolder(account.getPithos(), false, callback, true);
1212     }
1213
1214     void createMySharedTree() {
1215         LOG("Pithos::createMySharedTree()");
1216         mysharedTreeSelectionModel = new SingleSelectionModel<Folder>();
1217         mysharedTreeSelectionModel.addSelectionChangeHandler(new Handler() {
1218             @Override
1219             public void onSelectionChange(SelectionChangeEvent event) {
1220                 if(mysharedTreeSelectionModel.getSelectedObject() != null) {
1221                     deselectOthers(mysharedTreeView, mysharedTreeSelectionModel);
1222                     upload.setEnabled(false);
1223                     disableUploadArea();
1224                     updateSharedFolder(mysharedTreeSelectionModel.getSelectedObject(), true);
1225                     showRelevantToolbarButtons();
1226                 }
1227                 else {
1228                     if(getSelectedTree().equals(mysharedTreeView)) {
1229                         setSelectedTree(null);
1230                     }
1231                     if(getSelectedTree() == null) {
1232                         showRelevantToolbarButtons();
1233                     }
1234                 }
1235             }
1236         });
1237         selectionModels.add(mysharedTreeSelectionModel);
1238         mysharedTreeViewModel = new MysharedTreeViewModel(Pithos.this, mysharedTreeSelectionModel);
1239         mysharedTreeViewModel.initialize(new Command() {
1240
1241             @Override
1242             public void execute() {
1243                 mysharedTreeView = new MysharedTreeView(mysharedTreeViewModel);
1244                 trees.insert(mysharedTreeView, 2);
1245                 treeViews.add(mysharedTreeView);
1246                 createOtherSharedTree();
1247             }
1248         });
1249     }
1250
1251     void createOtherSharedTree() {
1252         LOG("Pithos::createOtherSharedTree()");
1253         otherSharedTreeSelectionModel = new SingleSelectionModel<Folder>();
1254         otherSharedTreeSelectionModel.addSelectionChangeHandler(new Handler() {
1255             @Override
1256             public void onSelectionChange(SelectionChangeEvent event) {
1257                 if(otherSharedTreeSelectionModel.getSelectedObject() != null) {
1258                     deselectOthers(otherSharedTreeView, otherSharedTreeSelectionModel);
1259                     applyPermissions(otherSharedTreeSelectionModel.getSelectedObject());
1260                     updateOtherSharedFolder(otherSharedTreeSelectionModel.getSelectedObject(), true, null);
1261                     showRelevantToolbarButtons();
1262                 }
1263                 else {
1264                     if(getSelectedTree().equals(otherSharedTreeView)) {
1265                         setSelectedTree(null);
1266                     }
1267                     if(getSelectedTree() == null) {
1268                         showRelevantToolbarButtons();
1269                     }
1270                 }
1271             }
1272         });
1273         selectionModels.add(otherSharedTreeSelectionModel);
1274         otherSharedTreeViewModel = new OtherSharedTreeViewModel(Pithos.this, otherSharedTreeSelectionModel);
1275         LOG("Pithos::createOtherSharedTree(), initializing otherSharedTreeViewModel with a callback");
1276         otherSharedTreeViewModel.initialize(new Command() {
1277             @Override
1278             public void execute() {
1279                 otherSharedTreeView = new OtherSharedTreeView(otherSharedTreeViewModel);
1280                 trees.insert(otherSharedTreeView, 1);
1281                 treeViews.add(otherSharedTreeView);
1282                 scheduleResfresh();
1283             }
1284         });
1285     }
1286
1287     public String getErrorData() {
1288         final StringBuilder sb = new StringBuilder();
1289         final String NL = Const.NL;
1290         Throwable t = this.error;
1291         while(t != null) {
1292             sb.append(t.toString());
1293             sb.append(NL);
1294             StackTraceElement[] traces = t.getStackTrace();
1295             for(StackTraceElement trace : traces) {
1296                 sb.append("  [");
1297                 sb.append(trace.getClassName());
1298                 sb.append("::");
1299                 sb.append(trace.getMethodName());
1300                 sb.append("() at ");
1301                 sb.append(trace.getFileName());
1302                 sb.append(":");
1303                 sb.append(trace.getLineNumber());
1304                 sb.append("]");
1305                 sb.append(NL);
1306             }
1307             t = t.getCause();
1308         }
1309
1310         return sb.toString();
1311     }
1312
1313     public void setError(Throwable t) {
1314         error = t;
1315     }
1316
1317     public void showRelevantToolbarButtons() {
1318         toolbar.showRelevantButtons();
1319     }
1320
1321     public FileUploadDialog getFileUploadDialog() {
1322         if(fileUploadDialog == null) {
1323             fileUploadDialog = new FileUploadDialog(this);
1324         }
1325         return fileUploadDialog;
1326     }
1327
1328     public void hideUploadIndicator() {
1329         upload.removeStyleName("pithos-uploadButton-loading");
1330         upload.setTitle("");
1331     }
1332
1333     public void showUploadIndicator() {
1334         upload.addStyleName("pithos-uploadButton-loading");
1335         upload.setTitle("Upload in progress. Click for details.");
1336     }
1337
1338     public void scheduleFolderHeadCommand(final Folder folder, final Command callback) {
1339         if(folder == null) {
1340             if(callback != null) {
1341                 callback.execute();
1342             }
1343         }
1344         else {
1345             HeadRequest<Folder> headFolder = new HeadRequest<Folder>(Folder.class, getApiPath(), folder.getOwnerID(), folder.getUri(), folder) {
1346
1347                 @Override
1348                 public void onSuccess(Folder _result) {
1349                     if(callback != null) {
1350                         callback.execute();
1351                     }
1352                 }
1353
1354                 @Override
1355                 public void onError(Throwable t) {
1356                     if(t instanceof RestException) {
1357                         if(((RestException) t).getHttpStatusCode() == Response.SC_NOT_FOUND) {
1358                             final String path = folder.getUri();
1359                             PutRequest newFolder = new PutRequest(getApiPath(), folder.getOwnerID(), path) {
1360                                 @Override
1361                                 public void onSuccess(Resource _result) {
1362                                     scheduleFolderHeadCommand(folder, callback);
1363                                 }
1364
1365                                 @Override
1366                                 public void onError(Throwable _t) {
1367                                     LOG(_t);
1368                                     setError(_t);
1369                                     if(_t instanceof RestException) {
1370                                         displayError("Unable to create folder: " + ((RestException) _t).getHttpStatusText());
1371                                     }
1372                                     else {
1373                                         displayError("System error creating folder: " + _t.getMessage());
1374                                     }
1375                                 }
1376
1377                                 @Override
1378                                 protected void onUnauthorized(Response response) {
1379                                     sessionExpired();
1380                                 }
1381                             };
1382                             newFolder.setHeader(Const.X_AUTH_TOKEN, getUserToken());
1383                             newFolder.setHeader(Const.CONTENT_TYPE, "application/folder");
1384                             newFolder.setHeader(Const.ACCEPT, "*/*");
1385                             newFolder.setHeader(Const.CONTENT_LENGTH, "0");
1386                             Scheduler.get().scheduleDeferred(newFolder);
1387                         }
1388                         else if(((RestException) t).getHttpStatusCode() == Response.SC_FORBIDDEN) {
1389                             onSuccess(folder);
1390                         }
1391                         else {
1392                             displayError("Error heading folder: " + ((RestException) t).getHttpStatusText());
1393                         }
1394                     }
1395                     else {
1396                         displayError("System error heading folder: " + t.getMessage());
1397                     }
1398
1399                     LOG("Error heading folder", t);
1400                     setError(t);
1401                 }
1402
1403                 @Override
1404                 protected void onUnauthorized(Response response) {
1405                     sessionExpired();
1406                 }
1407             };
1408             headFolder.setHeader(Const.X_AUTH_TOKEN, getUserToken());
1409             Scheduler.get().scheduleDeferred(headFolder);
1410         }
1411     }
1412
1413     public void scheduleFileHeadCommand(File f, final Command callback) {
1414         HeadRequest<File> headFile = new HeadRequest<File>(File.class, getApiPath(), f.getOwnerID(), f.getUri(), f) {
1415
1416             @Override
1417             public void onSuccess(File _result) {
1418                 if(callback != null) {
1419                     callback.execute();
1420                 }
1421             }
1422
1423             @Override
1424             public void onError(Throwable t) {
1425                 LOG("Error heading file", t);
1426                 setError(t);
1427                 if(t instanceof RestException) {
1428                     displayError("Error heading file: " + ((RestException) t).getHttpStatusText());
1429                 }
1430                 else {
1431                     displayError("System error heading file: " + t.getMessage());
1432                 }
1433             }
1434
1435             @Override
1436             protected void onUnauthorized(Response response) {
1437                 sessionExpired();
1438             }
1439         };
1440         headFile.setHeader(Const.X_AUTH_TOKEN, getUserToken());
1441         Scheduler.get().scheduleDeferred(headFile);
1442     }
1443
1444     public boolean isMySharedSelected() {
1445         return getSelectedTree().equals(getMySharedTreeView());
1446     }
1447
1448     private Folder getUploadFolder() {
1449         if(folderTreeView.equals(getSelectedTree()) || otherSharedTreeView.equals(getSelectedTree())) {
1450             return getSelection();
1451         }
1452         return null;
1453     }
1454
1455     private void updateUploadFolder() {
1456         updateUploadFolder(null);
1457     }
1458
1459     private void updateUploadFolder(final JsArrayString urls) {
1460         if(folderTreeView.equals(getSelectedTree()) || otherSharedTreeView.equals(getSelectedTree())) {
1461             Folder f = getSelection();
1462             if(getSelectedTree().equals(getFolderTreeView())) {
1463                 updateFolder(f, true, new Command() {
1464
1465                     @Override
1466                     public void execute() {
1467                         updateStatistics();
1468                         if(urls != null) {
1469                             selectUploadedFiles(urls);
1470                         }
1471                     }
1472                 }, false);
1473             }
1474             else {
1475                 updateOtherSharedFolder(f, true, null);
1476             }
1477         }
1478     }
1479
1480     public native void disableUploadArea() /*-{
1481       var uploader = $wnd.$("#uploader").pluploadQueue();
1482       var dropElm = $wnd.document.getElementById('rightPanel');
1483       $wnd.plupload.removeAllEvents(dropElm, uploader.id);
1484     }-*/;
1485
1486     public native void enableUploadArea() /*-{
1487       var uploader = $wnd.$("#uploader").pluploadQueue();
1488       var dropElm = $wnd.document.getElementById('rightPanel');
1489       $wnd.plupload.removeAllEvents(dropElm, uploader.id);
1490       if (uploader.runtime == 'html5') {
1491         uploader.settings.drop_element = 'rightPanel';
1492         uploader.trigger('PostInit');
1493       }
1494     }-*/;
1495
1496     public void showUploadAlert(int nOfFiles) {
1497         if(uploadAlert == null) {
1498             uploadAlert = new UploadAlert(this, nOfFiles);
1499         }
1500         if(!uploadAlert.isShowing()) {
1501             uploadAlert.setPopupPositionAndShow(new PopupPanel.PositionCallback() {
1502
1503                 @Override
1504                 public void setPosition(int offsetWidth, int offsetHeight) {
1505                     uploadAlert.setPopupPosition((Window.getClientWidth() - offsetWidth) / 2, statusPanel.getAbsoluteTop() - offsetHeight);
1506                 }
1507             });
1508         }
1509         uploadAlert.setNumOfFiles(nOfFiles);
1510     }
1511
1512     public void hideUploadAlert() {
1513         if(uploadAlert != null && uploadAlert.isShowing()) {
1514             uploadAlert.hide();
1515         }
1516     }
1517
1518     public void selectUploadedFiles(JsArrayString urls) {
1519         List<String> selectedUrls = new ArrayList<String>();
1520         for(int i = 0; i < urls.length(); i++) {
1521             selectedUrls.add(urls.get(i));
1522         }
1523         fileList.selectByUrl(selectedUrls);
1524     }
1525
1526     public void purgeContainer(final Folder container) {
1527         String path = "/" + container.getName() + "?delimiter=/";
1528         DeleteRequest delete = new DeleteRequest(getApiPath(), getUserID(), path) {
1529
1530             @Override
1531             protected void onUnauthorized(Response response) {
1532                 sessionExpired();
1533             }
1534
1535             @Override
1536             public void onSuccess(Resource result) {
1537                 updateFolder(container, true, null, true);
1538             }
1539
1540             @Override
1541             public void onError(Throwable t) {
1542                 LOG("Error deleting trash", t);
1543                 setError(t);
1544                 if(t instanceof RestException) {
1545                     displayError("Error deleting trash: " + ((RestException) t).getHttpStatusText());
1546                 }
1547                 else {
1548                     displayError("System error deleting trash: " + t.getMessage());
1549                 }
1550             }
1551         };
1552         delete.setHeader(Const.X_AUTH_TOKEN, getUserToken());
1553         Scheduler.get().scheduleDeferred(delete);
1554     }
1555 }