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

   1 /*
   2  * Copyright 2011 GRNET S.A. All rights reserved.
   3  *
   4  * Redistribution and use in source and binary forms, with or
   5  * without modification, are permitted provided that the following
   6  * conditions are met:
   7  *
   8  *   1. Redistributions of source code must retain the above
   9  *      copyright notice, this list of conditions and the following
  10  *      disclaimer.
  11  *
  12  *   2. Redistributions in binary form must reproduce the above
  13  *      copyright notice, this list of conditions and the following
  14  *      disclaimer in the documentation and/or other materials
  15  *      provided with the distribution.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY GRNET S.A. ``AS IS'' AND ANY EXPRESS
  18  * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  19  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  20  * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL GRNET S.A OR
  21  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  22  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  23  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
  24  * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
  25  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  26  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
  27  * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  28  * POSSIBILITY OF SUCH DAMAGE.
  29  *
  30  * The views and conclusions contained in the software and
  31  * documentation are those of the authors and should not be
  32  * interpreted as representing official policies, either expressed
  33  * or implied, of GRNET S.A.
  34  */
  35 package gr.grnet.pithos.web.client;
  36
  37 import gr.grnet.pithos.web.client.commands.UploadFileCommand;
  38 import gr.grnet.pithos.web.client.foldertree.AccountResource;
  39 import gr.grnet.pithos.web.client.foldertree.File;
  40 import gr.grnet.pithos.web.client.foldertree.Folder;
  41 import gr.grnet.pithos.web.client.foldertree.FolderTreeView;
  42 import gr.grnet.pithos.web.client.foldertree.FolderTreeViewModel;
  43 import gr.grnet.pithos.web.client.foldertree.Resource;
  44 import gr.grnet.pithos.web.client.grouptree.Group;
  45 import gr.grnet.pithos.web.client.grouptree.GroupTreeView;
  46 import gr.grnet.pithos.web.client.grouptree.GroupTreeViewModel;
  47 import gr.grnet.pithos.web.client.mysharedtree.MysharedTreeView;
  48 import gr.grnet.pithos.web.client.mysharedtree.MysharedTreeViewModel;
  49 import gr.grnet.pithos.web.client.othersharedtree.OtherSharedTreeView;
  50 import gr.grnet.pithos.web.client.othersharedtree.OtherSharedTreeViewModel;
  51 import gr.grnet.pithos.web.client.rest.DeleteRequest;
  52 import gr.grnet.pithos.web.client.rest.GetRequest;
  53 import gr.grnet.pithos.web.client.rest.HeadRequest;
  54 import gr.grnet.pithos.web.client.rest.PutRequest;
  55 import gr.grnet.pithos.web.client.rest.RestException;
  56 import gr.grnet.pithos.web.client.tagtree.Tag;
  57 import gr.grnet.pithos.web.client.tagtree.TagTreeView;
  58 import gr.grnet.pithos.web.client.tagtree.TagTreeViewModel;
  59
  60 import java.util.ArrayList;
  61 import java.util.HashMap;
  62 import java.util.Iterator;
  63 import java.util.List;
  64 import java.util.Set;
  65
  66 import com.google.gwt.core.client.EntryPoint;
  67 import com.google.gwt.core.client.GWT;
  68 import com.google.gwt.core.client.Scheduler;
  69 import com.google.gwt.core.client.Scheduler.ScheduledCommand;
  70 import com.google.gwt.event.dom.client.ClickEvent;
  71 import com.google.gwt.event.dom.client.ClickHandler;
  72 import com.google.gwt.event.logical.shared.ResizeEvent;
  73 import com.google.gwt.event.logical.shared.ResizeHandler;
  74 import com.google.gwt.http.client.Request;
  75 import com.google.gwt.http.client.RequestBuilder;
  76 import com.google.gwt.http.client.RequestCallback;
  77 import com.google.gwt.http.client.RequestException;
  78 import com.google.gwt.http.client.Response;
  79 import com.google.gwt.http.client.URL;
  80 import com.google.gwt.i18n.client.DateTimeFormat;
  81 import com.google.gwt.i18n.client.DateTimeFormat.PredefinedFormat;
  82 import com.google.gwt.json.client.JSONArray;
  83 import com.google.gwt.json.client.JSONObject;
  84 import com.google.gwt.json.client.JSONParser;
  85 import com.google.gwt.json.client.JSONString;
  86 import com.google.gwt.json.client.JSONValue;
  87 import com.google.gwt.resources.client.ImageResource;
  88 import com.google.gwt.user.client.Command;
  89 import com.google.gwt.user.client.Cookies;
  90 import com.google.gwt.user.client.Event;
  91 import com.google.gwt.user.client.History;
  92 import com.google.gwt.user.client.Window;
  93 import com.google.gwt.user.client.ui.AbstractImagePrototype;
  94 import com.google.gwt.user.client.ui.Button;
  95 import com.google.gwt.user.client.ui.HTML;
  96 import com.google.gwt.user.client.ui.HasHorizontalAlignment;
  97 import com.google.gwt.user.client.ui.HasVerticalAlignment;
  98 import com.google.gwt.user.client.ui.HorizontalPanel;
  99 import com.google.gwt.user.client.ui.HorizontalSplitPanel;
 100 import com.google.gwt.user.client.ui.RootPanel;
 101 import com.google.gwt.user.client.ui.VerticalPanel;
 102 import com.google.gwt.view.client.SelectionChangeEvent;
 103 import com.google.gwt.view.client.SelectionChangeEvent.Handler;
 104 import com.google.gwt.view.client.SingleSelectionModel;
 105
 106 /**
 107  * Entry point classes define <code>onModuleLoad()</code>.
 108  */
 109 public class Pithos implements EntryPoint, ResizeHandler {
 110
 111         public static final String HOME_CONTAINER = "pithos";
 112
 113         public static final String TRASH_CONTAINER = "trash";
 114
 115         /**
 116          * Instantiate an application-level image bundle. This object will provide
 117          * programmatic access to all the images needed by widgets.
 118          */
 119         static Images images = (Images) GWT.create(Images.class);
 120
 121     public String getUsername() {
 122         return username;
 123     }
 124
 125     public void setAccount(AccountResource acct) {
 126         account = acct;
 127     }
 128
 129     public AccountResource getAccount() {
 130         return account;
 131     }
 132
 133     public void updateFolder(Folder f, boolean showfiles, Command callback) {
 134         folderTreeView.updateFolder(f, showfiles, callback);
 135     }
 136
 137     public void updateGroupNode(Group group) {
 138         groupTreeView.updateGroupNode(group);
 139     }
 140
 141     public void updateSharedFolder(Folder f, boolean showfiles) {
 142         mysharedTreeView.updateFolder(f, showfiles);
 143     }
 144
 145     public void updateOtherSharedFolder(Folder f, boolean showfiles) {
 146         otherSharedTreeView.updateFolder(f, showfiles);
 147     }
 148
 149     public void updateTag(Tag t) {
 150         tagTreeView.updateTag(t);
 151     }
 152
 153     public void updateTags() {
 154         tagTreeViewModel.initialize(getAllTags());
 155     }
 156
 157     public List<Tag> getAllTags() {
 158         List<Tag> tagList = new ArrayList<Tag>();
 159         for (Folder f : account.getContainers()) {
 160             for (String t : f.getTags()) {
 161                 tagList.add(new Tag(t));
 162             }
 163         }
 164         return tagList;
 165     }
 166
 167     public MysharedTreeView getMySharedTreeView() {
 168         return mysharedTreeView;
 169     }
 170
 171     /**
 172          * An aggregate image bundle that pulls together all the images for this
 173          * application into a single bundle.
 174          */
 175         public interface Images extends TopPanel.Images, FileList.Images, ToolsMenu.Images {
 176
 177                 @Source("gr/grnet/pithos/resources/document.png")
 178                 ImageResource folders();
 179
 180                 @Source("gr/grnet/pithos/resources/advancedsettings.png")
 181                 ImageResource tools();
 182         }
 183
 184         /**
 185          * The Application Clipboard implementation;
 186          */
 187         private Clipboard clipboard = new Clipboard();
 188
 189         /**
 190          * The top panel that contains the menu bar.
 191          */
 192         private TopPanel topPanel;
 193
 194         /**
 195          * The panel that contains the various system messages.
 196          */
 197         private MessagePanel messagePanel = new MessagePanel(Pithos.images);
 198
 199         /**
 200          * The bottom panel that contains the status bar.
 201          */
 202         private StatusPanel statusPanel = null;
 203
 204         /**
 205          * The file list widget.
 206          */
 207         private FileList fileList;
 208
 209         /**
 210          * The tab panel that occupies the right side of the screen.
 211          */
 212         private VerticalPanel inner = new VerticalPanel();
 213
 214
 215         /**
 216          * The split panel that will contain the left and right panels.
 217          */
 218         private HorizontalSplitPanel splitPanel = new HorizontalSplitPanel();
 219
 220         /**
 221          * The currently selected item in the application, for use by the Edit menu
 222          * commands. Potential types are Folder, File, User and Group.
 223          */
 224         private Object currentSelection;
 225
 226         public HashMap<String, String> userFullNameMap = new HashMap<String, String>();
 227
 228     private String username = null;
 229
 230     /**
 231      * The authentication token of the current user.
 232      */
 233     private String token;
 234
 235     SingleSelectionModel<Folder> folderTreeSelectionModel;
 236     FolderTreeViewModel folderTreeViewModel;
 237     FolderTreeView folderTreeView;
 238
 239     SingleSelectionModel<Folder> mysharedTreeSelectionModel;
 240     private MysharedTreeViewModel mysharedTreeViewModel;
 241     MysharedTreeView mysharedTreeView;
 242
 243     protected SingleSelectionModel<Folder> otherSharedTreeSelectionModel;
 244     private OtherSharedTreeViewModel otherSharedTreeViewModel;
 245     OtherSharedTreeView otherSharedTreeView;
 246
 247     protected SingleSelectionModel<Tag> tagTreeSelectionModel;
 248     private TagTreeViewModel tagTreeViewModel;
 249     private TagTreeView tagTreeView;
 250
 251     GroupTreeViewModel groupTreeViewModel;
 252     private GroupTreeView groupTreeView;
 253
 254     private TreeView selectedTree;
 255     protected AccountResource account;
 256
 257     Folder trash;
 258
 259     @SuppressWarnings("rawtypes")
 260         private List<SingleSelectionModel> selectionModels = new ArrayList<SingleSelectionModel>();
 261
 262     Button upload;
 263
 264     private HTML totalFiles;
 265
 266     private HTML usedBytes;
 267
 268     private HTML totalBytes;
 269
 270     private HTML usedPercent;
 271
 272     private HTML numOfFiles;
 273
 274     private Button toolsButton;
 275
 276         @Override
 277         public void onModuleLoad() {
 278                 if (parseUserCredentials())
 279             initialize();
 280         }
 281
 282     private void initialize() {
 283         VerticalPanel outer = new VerticalPanel();
 284         outer.setWidth("100%");
 285
 286         topPanel = new TopPanel(this, Pithos.images);
 287         topPanel.setWidth("100%");
 288         outer.add(topPanel);
 289
 290         messagePanel.setWidth("100%");
 291         messagePanel.setVisible(false);
 292         outer.add(messagePanel);
 293         outer.setCellHorizontalAlignment(messagePanel, HasHorizontalAlignment.ALIGN_CENTER);
 294
 295
 296         // Inner contains the various lists.
 297         inner.sinkEvents(Event.ONCONTEXTMENU);
 298         inner.setWidth("100%");
 299
 300         HorizontalPanel rightside = new HorizontalPanel();
 301         rightside.addStyleName("pithos-rightSide");
 302         rightside.setSpacing(5);
 303
 304         toolsButton = new Button(AbstractImagePrototype.create(images.tools()).getHTML());
 305         toolsButton.addClickHandler(new ClickHandler() {
 306
 307                         @Override
 308                         public void onClick(ClickEvent event) {
 309                 ToolsMenu menu = new ToolsMenu(Pithos.this, images, getSelectedTree(), getSelectedTree().getSelection(), getFileList().getSelectedFiles());
 310                 if (!menu.isEmpty()) {
 311                             menu.setPopupPosition(event.getClientX(), event.getClientY());
 312                             menu.show();
 313                 }
 314                         }
 315                 });
 316         rightside.add(toolsButton);
 317         rightside.setCellHorizontalAlignment(toolsButton, HasHorizontalAlignment.ALIGN_LEFT);
 318
 319         HorizontalPanel folderStatistics = new HorizontalPanel();
 320         folderStatistics.addStyleName("pithos-folderStatistics");
 321         numOfFiles = new HTML();
 322         folderStatistics.add(numOfFiles);
 323         HTML numOfFilesLabel = new HTML("&nbsp;Files");
 324         folderStatistics.add(numOfFilesLabel);
 325         rightside.add(folderStatistics);
 326         rightside.setCellHorizontalAlignment(folderStatistics, HasHorizontalAlignment.ALIGN_RIGHT);
 327
 328         inner.add(rightside);
 329         inner.setCellVerticalAlignment(rightside, HasVerticalAlignment.ALIGN_MIDDLE);
 330         inner.setCellHeight(rightside, "60px");
 331
 332         folderTreeSelectionModel = new SingleSelectionModel<Folder>();
 333         folderTreeSelectionModel.addSelectionChangeHandler(new SelectionChangeEvent.Handler() {
 334             @Override
 335             public void onSelectionChange(@SuppressWarnings("unused") SelectionChangeEvent event) {
 336                 if (folderTreeSelectionModel.getSelectedObject() != null) {
 337                     deselectOthers(folderTreeView, folderTreeSelectionModel);
 338                     applyPermissions(folderTreeSelectionModel.getSelectedObject());
 339                     Folder f = folderTreeSelectionModel.getSelectedObject();
 340                     updateFolder(f, true, null);
 341                 }
 342             }
 343         });
 344         selectionModels.add(folderTreeSelectionModel);
 345
 346         folderTreeViewModel = new FolderTreeViewModel(this, folderTreeSelectionModel);
 347         folderTreeView = new FolderTreeView(folderTreeViewModel);
 348
 349         fileList = new FileList(this, images, folderTreeView);
 350         inner.add(fileList);
 351
 352         mysharedTreeSelectionModel = new SingleSelectionModel<Folder>();
 353         mysharedTreeSelectionModel.addSelectionChangeHandler(new Handler() {
 354             @Override
 355             public void onSelectionChange(@SuppressWarnings("unused") SelectionChangeEvent event) {
 356                 if (mysharedTreeSelectionModel.getSelectedObject() != null) {
 357                     deselectOthers(mysharedTreeView, mysharedTreeSelectionModel);
 358                     upload.setEnabled(false);
 359                     updateSharedFolder(mysharedTreeSelectionModel.getSelectedObject(), true);
 360                 }
 361             }
 362         });
 363         selectionModels.add(mysharedTreeSelectionModel);
 364         mysharedTreeViewModel = new MysharedTreeViewModel(this, mysharedTreeSelectionModel);
 365         mysharedTreeView = new MysharedTreeView(mysharedTreeViewModel);
 366
 367         otherSharedTreeSelectionModel = new SingleSelectionModel<Folder>();
 368         otherSharedTreeSelectionModel.addSelectionChangeHandler(new Handler() {
 369             @Override
 370             public void onSelectionChange(@SuppressWarnings("unused") SelectionChangeEvent event) {
 371                 if (otherSharedTreeSelectionModel.getSelectedObject() != null) {
 372                     deselectOthers(otherSharedTreeView, otherSharedTreeSelectionModel);
 373                     applyPermissions(otherSharedTreeSelectionModel.getSelectedObject());
 374                     updateOtherSharedFolder(otherSharedTreeSelectionModel.getSelectedObject(), true);
 375                 }
 376             }
 377         });
 378         selectionModels.add(otherSharedTreeSelectionModel);
 379         otherSharedTreeViewModel = new OtherSharedTreeViewModel(this, otherSharedTreeSelectionModel);
 380         otherSharedTreeView = new OtherSharedTreeView(otherSharedTreeViewModel);
 381
 382         groupTreeViewModel = new GroupTreeViewModel(this);
 383         groupTreeView = new GroupTreeView(groupTreeViewModel);
 384
 385         VerticalPanel trees = new VerticalPanel();
 386
 387         upload = new Button("Upload File", new ClickHandler() {
 388             @Override
 389             public void onClick(@SuppressWarnings("unused") ClickEvent event) {
 390                 new UploadFileCommand(Pithos.this, null, getSelection()).execute();
 391             }
 392         });
 393         upload.addStyleName("pithos-uploadButton");
 394         trees.add(upload);
 395
 396         HorizontalPanel treeHeader = new HorizontalPanel();
 397         treeHeader.addStyleName("pithos-treeHeader");
 398         HorizontalPanel statistics = new HorizontalPanel();
 399         statistics.add(new HTML("Total Objects:&nbsp;"));
 400         totalFiles = new HTML();
 401         statistics.add(totalFiles);
 402         statistics.add(new HTML("&nbsp;|&nbsp;Used:&nbsp;"));
 403         usedBytes = new HTML();
 404         statistics.add(usedBytes);
 405         statistics.add(new HTML("&nbsp;of&nbsp;"));
 406         totalBytes = new HTML();
 407         statistics.add(totalBytes);
 408         statistics.add(new HTML("&nbsp;("));
 409         usedPercent = new HTML();
 410         statistics.add(usedPercent);
 411         statistics.add(new HTML("%)"));
 412         treeHeader.add(statistics);
 413         trees.add(treeHeader);
 414
 415         trees.add(folderTreeView);
 416         trees.add(mysharedTreeView);
 417         trees.add(otherSharedTreeView);
 418 //        trees.add(tagTreeView);
 419         trees.add(groupTreeView);
 420         // Add the left and right panels to the split panel.
 421         splitPanel.setLeftWidget(trees);
 422         splitPanel.setRightWidget(inner);
 423         splitPanel.setSplitPosition("25%");
 424         splitPanel.setSize("100%", "100%");
 425         splitPanel.addStyleName("pithos-splitPanel");
 426         outer.add(splitPanel);
 427
 428         statusPanel = new StatusPanel();
 429         outer.add(statusPanel);
 430
 431
 432         // Hook the window resize event, so that we can adjust the UI.
 433         Window.addResizeHandler(this);
 434         // Clear out the window's built-in margin, because we want to take
 435         // advantage of the entire client area.
 436         Window.setMargin("0px");
 437         // Finally, add the outer panel to the RootPanel, so that it will be
 438         // displayed.
 439         RootPanel.get().add(outer);
 440         // Call the window resized handler to get the initial sizes setup. Doing
 441         // this in a deferred command causes it to occur after all widgets'
 442         // sizes have been computed by the browser.
 443         Scheduler.get().scheduleDeferred(new ScheduledCommand() {
 444
 445             @Override
 446             public void execute() {
 447                 onWindowResized(Window.getClientHeight());
 448             }
 449         });
 450
 451         Scheduler.get().scheduleDeferred(new ScheduledCommand() {
 452             @Override
 453             public void execute() {
 454                 fetchAccount(new Command() {
 455
 456                                         @Override
 457                                         public void execute() {
 458                                 if (!account.hasHomeContainer())
 459                                     createHomeContainer(account, this);
 460                                 else if (!account.hasTrashContainer())
 461                                         createTrashContainer(this);
 462                                 else {
 463                                         for (Folder f : account.getContainers())
 464                                                 if (f.getName().equals(Pithos.TRASH_CONTAINER)) {
 465                                                         trash = f;
 466                                                         break;
 467                                                 }
 468                                     folderTreeViewModel.initialize(account);
 469                                     groupTreeViewModel.initialize();
 470                                     showStatistics();
 471                                 }
 472                                         }
 473                                 });
 474             }
 475         });
 476     }
 477
 478     public void applyPermissions(Folder f) {
 479         if (f != null) {
 480                 if (f.isInTrash())
 481                         upload.setEnabled(false);
 482                 else {
 483                         Boolean[] perms = f.getPermissions().get(username);
 484                         if (f.getOwner().equals(username) || (perms != null && perms[1] != null && perms[1])) {
 485                                 upload.setEnabled(true);
 486                         }
 487                         else
 488                                 upload.setEnabled(false);
 489                 }
 490         }
 491         else
 492                 upload.setEnabled(false);
 493         }
 494
 495         @SuppressWarnings({ "rawtypes", "unchecked" })
 496         public void deselectOthers(TreeView _selectedTree, SingleSelectionModel model) {
 497         selectedTree = _selectedTree;
 498         for (SingleSelectionModel s : selectionModels)
 499             if (!s.equals(model))
 500                 s.setSelected(s.getSelectedObject(), false);
 501     }
 502
 503     public void showFiles(Folder f) {
 504         Set<File> files = f.getFiles();
 505         showFiles(files);
 506     }
 507
 508     public void showFiles(Set<File> files) {
 509         //Iterator<File> iter = files.iterator();
 510         //fetchFile(iter, files);
 511         fileList.setFiles(new ArrayList<File>(files));
 512     }
 513
 514     protected void fetchFile(final Iterator<File> iter, final Set<File> files) {
 515         if (iter.hasNext()) {
 516             File file = iter.next();
 517             String path = file.getUri() + "?format=json";
 518             GetRequest<File> getFile = new GetRequest<File>(File.class, getApiPath(), username, path, file) {
 519                 @Override
 520                 public void onSuccess(@SuppressWarnings("unused") File _result) {
 521                     fetchFile(iter, files);
 522                 }
 523
 524                 @Override
 525                 public void onError(Throwable t) {
 526                     GWT.log("Error getting file", t);
 527                     if (t instanceof RestException)
 528                         displayError("Error getting file: " + ((RestException) t).getHttpStatusText());
 529                     else
 530                         displayError("System error fetching file: " + t.getMessage());
 531                 }
 532
 533                                 @Override
 534                                 protected void onUnauthorized(Response response) {
 535                                         sessionExpired();
 536                                 }
 537             };
 538             getFile.setHeader("X-Auth-Token", "0000");
 539             Scheduler.get().scheduleDeferred(getFile);
 540         }
 541         else
 542             fileList.setFiles(new ArrayList<File>(files));
 543     }
 544
 545     /**
 546          * Parse and store the user credentials to the appropriate fields.
 547          */
 548         private boolean parseUserCredentials() {
 549         username = Window.Location.getParameter("user");
 550         token = Window.Location.getParameter("token");
 551         Configuration conf = (Configuration) GWT.create(Configuration.class);
 552         if (username == null || username.length() == 0 || token == null || token.length() == 0) {
 553             String cookie = conf.authCookie();
 554             String auth = Cookies.getCookie(cookie);
 555             if (auth == null) {
 556                 authenticateUser();
 557                 return false;
 558             }
 559                         String[] authSplit = auth.split("\\" + conf.cookieSeparator(), 2);
 560                         if (authSplit.length != 2) {
 561                             authenticateUser();
 562                             return false;
 563                         }
 564                         username = authSplit[0];
 565                         token = authSplit[1];
 566                         return true;
 567         }
 568                 Cookies.setCookie(conf.authCookie(), username + conf.cookieSeparator() + token);
 569                 return true;
 570     }
 571
 572     /**
 573          * Redirect the user to the login page for authentication.
 574          */
 575         protected void authenticateUser() {
 576                 Configuration conf = (Configuration) GWT.create(Configuration.class);
 577         Window.Location.assign(conf.loginUrl() + "?next=" + Window.Location.getHref());
 578         }
 579
 580         protected void fetchAccount(final Command callback) {
 581         String path = "?format=json";
 582
 583         GetRequest<AccountResource> getAccount = new GetRequest<AccountResource>(AccountResource.class, getApiPath(), username, path) {
 584             @Override
 585             public void onSuccess(AccountResource _result) {
 586                 account = _result;
 587                 if (callback != null)
 588                         callback.execute();
 589             }
 590
 591             @Override
 592             public void onError(Throwable t) {
 593                 GWT.log("Error getting account", t);
 594                 if (t instanceof RestException)
 595                     displayError("Error getting account: " + ((RestException) t).getHttpStatusText());
 596                 else
 597                     displayError("System error fetching user data: " + t.getMessage());
 598             }
 599
 600                         @Override
 601                         protected void onUnauthorized(Response response) {
 602                                 sessionExpired();
 603                         }
 604         };
 605         getAccount.setHeader("X-Auth-Token", token);
 606         Scheduler.get().scheduleDeferred(getAccount);
 607     }
 608
 609     public void updateStatistics() {
 610         HeadRequest<AccountResource> headAccount = new HeadRequest<AccountResource>(AccountResource.class, getApiPath(), username, "", account) {
 611
 612                         @Override
 613                         public void onSuccess(@SuppressWarnings("unused") AccountResource _result) {
 614                                 showStatistics();
 615                         }
 616
 617                         @Override
 618                         public void onError(Throwable t) {
 619                 GWT.log("Error getting account", t);
 620                 if (t instanceof RestException)
 621                     displayError("Error getting account: " + ((RestException) t).getHttpStatusText());
 622                 else
 623                     displayError("System error fetching user data: " + t.getMessage());
 624                         }
 625
 626                         @Override
 627                         protected void onUnauthorized(Response response) {
 628                                 sessionExpired();
 629                         }
 630                 };
 631                 headAccount.setHeader("X-Auth-Token", token);
 632                 Scheduler.get().scheduleDeferred(headAccount);
 633         }
 634
 635         protected void showStatistics() {
 636         totalFiles.setHTML(String.valueOf(account.getNumberOfObjects()));
 637         usedBytes.setHTML(String.valueOf(account.getFileSizeAsString()));
 638         totalBytes.setHTML(String.valueOf(account.getQuotaAsString()));
 639         usedPercent.setHTML(String.valueOf(account.getUsedPercentage()));
 640         }
 641
 642         protected void createHomeContainer(final AccountResource _account, final Command callback) {
 643         String path = "/" + Pithos.HOME_CONTAINER;
 644         PutRequest createPithos = new PutRequest(getApiPath(), getUsername(), path) {
 645             @Override
 646             public void onSuccess(@SuppressWarnings("unused") Resource result) {
 647                 if (!_account.hasTrashContainer())
 648                         createTrashContainer(callback);
 649                 else
 650                         fetchAccount(callback);
 651             }
 652
 653             @Override
 654             public void onError(Throwable t) {
 655                 GWT.log("Error creating pithos", t);
 656                 if (t instanceof RestException)
 657                     displayError("Error creating pithos: " + ((RestException) t).getHttpStatusText());
 658                 else
 659                     displayError("System error Error creating pithos: " + t.getMessage());
 660             }
 661
 662                         @Override
 663                         protected void onUnauthorized(Response response) {
 664                                 sessionExpired();
 665                         }
 666         };
 667         createPithos.setHeader("X-Auth-Token", getToken());
 668         Scheduler.get().scheduleDeferred(createPithos);
 669     }
 670
 671     protected void createTrashContainer(final Command callback) {
 672         String path = "/" + Pithos.TRASH_CONTAINER;
 673         PutRequest createPithos = new PutRequest(getApiPath(), getUsername(), path) {
 674             @Override
 675             public void onSuccess(@SuppressWarnings("unused") Resource result) {
 676                         fetchAccount(callback);
 677             }
 678
 679             @Override
 680             public void onError(Throwable t) {
 681                 GWT.log("Error creating pithos", t);
 682                 if (t instanceof RestException)
 683                     displayError("Error creating pithos: " + ((RestException) t).getHttpStatusText());
 684                 else
 685                     displayError("System error Error creating pithos: " + t.getMessage());
 686             }
 687
 688                         @Override
 689                         protected void onUnauthorized(Response response) {
 690                                 sessionExpired();
 691                         }
 692         };
 693         createPithos.setHeader("X-Auth-Token", getToken());
 694         Scheduler.get().scheduleDeferred(createPithos);
 695     }
 696
 697     /**
 698          * Creates an HTML fragment that places an image & caption together, for use
 699          * in a group header.
 700          *
 701          * @param imageProto an image prototype for an image
 702          * @param caption the group caption
 703          * @return the header HTML fragment
 704          */
 705         private String createHeaderHTML(AbstractImagePrototype imageProto, String caption) {
 706                 String captionHTML = "<table class='caption' cellpadding='0' "
 707                 + "cellspacing='0'>" + "<tr><td class='lcaption'>" + imageProto.getHTML()
 708                 + "</td><td id =" + caption +" class='rcaption'><b style='white-space:nowrap'>&nbsp;"
 709                 + caption + "</b></td></tr></table>";
 710                 return captionHTML;
 711         }
 712
 713         protected void onWindowResized(int height) {
 714                 // Adjust the split panel to take up the available room in the window.
 715                 int newHeight = height - splitPanel.getAbsoluteTop() - 60;
 716                 if (newHeight < 1)
 717                         newHeight = 1;
 718                 splitPanel.setHeight("" + newHeight);
 719                 inner.setHeight("" + newHeight);
 720         }
 721
 722         @Override
 723         public void onResize(ResizeEvent event) {
 724                 int height = event.getHeight();
 725                 onWindowResized(height);
 726         }
 727
 728         /**
 729          * Display an error message.
 730          *
 731          * @param msg the message to display
 732          */
 733         public void displayError(String msg) {
 734                 messagePanel.displayError(msg);
 735         }
 736
 737         /**
 738          * Display a warning message.
 739          *
 740          * @param msg the message to display
 741          */
 742         public void displayWarning(String msg) {
 743                 messagePanel.displayWarning(msg);
 744         }
 745
 746         /**
 747          * Display an informational message.
 748          *
 749          * @param msg the message to display
 750          */
 751         public void displayInformation(String msg) {
 752                 messagePanel.displayInformation(msg);
 753         }
 754
 755         /**
 756          * Retrieve the fileList.
 757          *
 758          * @return the fileList
 759          */
 760         public FileList getFileList() {
 761                 return fileList;
 762         }
 763
 764         /**
 765          * Retrieve the topPanel.
 766          *
 767          * @return the topPanel
 768          */
 769         TopPanel getTopPanel() {
 770                 return topPanel;
 771         }
 772
 773         /**
 774          * Retrieve the clipboard.
 775          *
 776          * @return the clipboard
 777          */
 778         public Clipboard getClipboard() {
 779                 return clipboard;
 780         }
 781
 782         public StatusPanel getStatusPanel() {
 783                 return statusPanel;
 784         }
 785
 786         public String getToken() {
 787                 return token;
 788         }
 789
 790         public static native void preventIESelection() /*-{
 791                 $doc.body.onselectstart = function () { return false; };
 792         }-*/;
 793
 794         public static native void enableIESelection() /*-{
 795                 if ($doc.body.onselectstart != null)
 796                 $doc.body.onselectstart = null;
 797         }-*/;
 798
 799         /**
 800          * @return the absolute path of the API root URL
 801          */
 802         public String getApiPath() {
 803                 Configuration conf = (Configuration) GWT.create(Configuration.class);
 804                 return conf.apiPath();
 805         }
 806
 807         /**
 808          * History support for folder navigation
 809          * adds a new browser history entry
 810          *
 811          * @param key
 812          */
 813         public void updateHistory(String key){
 814 //              Replace any whitespace of the initial string to "+"
 815 //              String result = key.replaceAll("\\s","+");
 816 //              Add a new browser history entry.
 817 //              History.newItem(result);
 818                 History.newItem(key);
 819         }
 820
 821     public void deleteFolder(final Folder folder) {
 822         String path = getApiPath() + folder.getOwner() + "/" + folder.getContainer() + "?format=json&delimiter=/&prefix=" + URL.encodeQueryString(folder.getPrefix()) + "&t=" + System.currentTimeMillis();
 823         RequestBuilder builder = new RequestBuilder(RequestBuilder.GET, path);
 824         builder.setHeader("X-Auth-Token", getToken());
 825         try {
 826             builder.sendRequest("", new RequestCallback() {
 827                 @Override
 828                 public void onResponseReceived(@SuppressWarnings("unused") Request request, Response response) {
 829                     if (response.getStatusCode() == Response.SC_OK) {
 830                         JSONValue json = JSONParser.parseStrict(response.getText());
 831                         JSONArray array = json.isArray();
 832                         int i = 0;
 833                         if (array != null) {
 834                             deleteObject(folder, i, array);
 835                         }
 836                     }
 837                 }
 838
 839                 @Override
 840                 public void onError(@SuppressWarnings("unused") Request request, Throwable exception) {
 841                     displayError("System error unable to delete folder: " + exception.getMessage());
 842                 }
 843             });
 844         }
 845         catch (RequestException e) {
 846         }
 847     }
 848
 849     void deleteObject(final Folder folder, final int i, final JSONArray array) {
 850         if (i < array.size()) {
 851             JSONObject o = array.get(i).isObject();
 852             if (o != null && !o.containsKey("subdir")) {
 853                 JSONString name = o.get("name").isString();
 854                 String path = "/" + folder.getContainer() + "/" + name.stringValue();
 855                 DeleteRequest delete = new DeleteRequest(getApiPath(), folder.getOwner(), path) {
 856                     @Override
 857                     public void onSuccess(@SuppressWarnings("unused") Resource result) {
 858                         deleteObject(folder, i + 1, array);
 859                     }
 860
 861                     @Override
 862                     public void onError(Throwable t) {
 863                         GWT.log("", t);
 864                         displayError("System error unable to delete folder: " + t.getMessage());
 865                     }
 866
 867                                 @Override
 868                                 protected void onUnauthorized(Response response) {
 869                                         sessionExpired();
 870                                 }
 871                 };
 872                 delete.setHeader("X-Auth-Token", getToken());
 873                 Scheduler.get().scheduleDeferred(delete);
 874             }
 875             else if (o != null) {
 876                 String subdir = o.get("subdir").isString().stringValue();
 877                 subdir = subdir.substring(0, subdir.length() - 1);
 878                 String path = getApiPath() + getUsername() + "/" + folder.getContainer() + "?format=json&delimiter=/&prefix=" + URL.encodeQueryString(subdir) + "&t=" + System.currentTimeMillis();
 879                 RequestBuilder builder = new RequestBuilder(RequestBuilder.GET, path);
 880                 builder.setHeader("X-Auth-Token", getToken());
 881                 try {
 882                     builder.sendRequest("", new RequestCallback() {
 883                         @Override
 884                         public void onResponseReceived(@SuppressWarnings("unused") Request request, Response response) {
 885                             if (response.getStatusCode() == Response.SC_OK) {
 886                                 JSONValue json = JSONParser.parseStrict(response.getText());
 887                                 JSONArray array2 = json.isArray();
 888                                 if (array2 != null) {
 889                                     int l = array.size();
 890                                     for (int j=0; j<array2.size(); j++) {
 891                                         array.set(l++, array2.get(j));
 892                                     }
 893                                 }
 894                                 deleteObject(folder, i + 1, array);
 895                             }
 896                         }
 897
 898                         @Override
 899                         public void onError(@SuppressWarnings("unused") Request request, Throwable exception) {
 900                             displayError("System error unable to delete folder: " + exception.getMessage());
 901                         }
 902                     });
 903                 }
 904                 catch (RequestException e) {
 905                 }
 906             }
 907         }
 908         else {
 909             String path = folder.getUri();
 910             DeleteRequest deleteFolder = new DeleteRequest(getApiPath(), getUsername(), path) {
 911                 @Override
 912                 public void onSuccess(@SuppressWarnings("unused") Resource result) {
 913                     updateFolder(folder.getParent(), true, new Command() {
 914
 915                                                 @Override
 916                                                 public void execute() {
 917                                                         updateStatistics();
 918                                                 }
 919                                         });
 920                 }
 921
 922                 @Override
 923                 public void onError(Throwable t) {
 924                     GWT.log("", t);
 925                     if (t instanceof RestException) {
 926                         if (((RestException) t).getHttpStatusCode() != Response.SC_NOT_FOUND)
 927                                 displayError("Unable to delete folder: "+((RestException) t).getHttpStatusText());
 928                         else
 929                                 onSuccess(null);
 930                     }
 931                     else
 932                         displayError("System error unable to delete folder: " + t.getMessage());
 933                 }
 934
 935                                 @Override
 936                                 protected void onUnauthorized(Response response) {
 937                                         sessionExpired();
 938                                 }
 939             };
 940             deleteFolder.setHeader("X-Auth-Token", getToken());
 941             Scheduler.get().scheduleDeferred(deleteFolder);
 942         }
 943     }
 944
 945     public FolderTreeView getFolderTreeView() {
 946         return folderTreeView;
 947     }
 948
 949     public void copyFiles(final Iterator<File> iter, final String targetUsername, final String targetUri, final Command callback) {
 950         if (iter.hasNext()) {
 951             File file = iter.next();
 952             String path = targetUri + "/" + file.getName();
 953             PutRequest copyFile = new PutRequest(getApiPath(), targetUsername, path) {
 954                 @Override
 955                 public void onSuccess(@SuppressWarnings("unused") Resource result) {
 956                     copyFiles(iter, targetUsername, targetUri, callback);
 957                 }
 958
 959                 @Override
 960                 public void onError(Throwable t) {
 961                     GWT.log("", t);
 962                     if (t instanceof RestException) {
 963                         displayError("Unable to copy file: " + ((RestException) t).getHttpStatusText());
 964                     }
 965                     else
 966                         displayError("System error unable to copy file: "+t.getMessage());
 967                 }
 968
 969                                 @Override
 970                                 protected void onUnauthorized(Response response) {
 971                                         sessionExpired();
 972                                 }
 973             };
 974             copyFile.setHeader("X-Auth-Token", getToken());
 975             copyFile.setHeader("X-Copy-From", file.getUri());
 976             Scheduler.get().scheduleDeferred(copyFile);
 977         }
 978         else  if (callback != null) {
 979             callback.execute();
 980         }
 981     }
 982
 983     public void copySubfolders(final Iterator<Folder> iter, final String targetUsername, final String targetUri, final Command callback) {
 984         if (iter.hasNext()) {
 985             final Folder f = iter.next();
 986             copyFolder(f, targetUsername, targetUri, new Command() {
 987
 988                                 @Override
 989                                 public void execute() {
 990                                         copySubfolders(iter, targetUsername, targetUri, callback);
 991                                 }
 992                         });
 993         }
 994         else  if (callback != null) {
 995             callback.execute();
 996         }
 997     }
 998
 999     public void copyFolder(final Folder f, final String targetUsername, final String targetUri, final Command callback) {
1000         String path = targetUri + "/" + f.getName();
1001         PutRequest createFolder = new PutRequest(getApiPath(), targetUsername, path) {
1002             @Override
1003             public void onSuccess(@SuppressWarnings("unused") Resource result) {
1004                 GetRequest<Folder> getFolder = new GetRequest<Folder>(Folder.class, getApiPath(), f.getOwner(), "/" + f.getContainer() + "?format=json&delimiter=/&prefix=" + URL.encodeQueryString(f.getPrefix()), f) {
1005
1006                                         @Override
1007                                         public void onSuccess(final Folder _f) {
1008                                 Iterator<File> iter = _f.getFiles().iterator();
1009                                 copyFiles(iter, targetUsername, targetUri + "/" + _f.getName(), new Command() {
1010                                     @Override
1011                                     public void execute() {
1012                                         Iterator<Folder> iterf = _f.getSubfolders().iterator();
1013                                         copySubfolders(iterf, targetUsername, targetUri + "/" + _f.getName(), callback);
1014                                     }
1015                                 });
1016                                         }
1017
1018                                         @Override
1019                                         public void onError(Throwable t) {
1020                                 GWT.log("", t);
1021                                 if (t instanceof RestException) {
1022                                     displayError("Unable to get folder: " + ((RestException) t).getHttpStatusText());
1023                                 }
1024                                 else
1025                                     displayError("System error getting folder: " + t.getMessage());
1026                                         }
1027
1028                                         @Override
1029                                         protected void onUnauthorized(Response response) {
1030                                                 sessionExpired();
1031                                         }
1032                                 };
1033                                 getFolder.setHeader("X-Auth-Token", getToken());
1034                                 Scheduler.get().scheduleDeferred(getFolder);
1035             }
1036
1037             @Override
1038             public void onError(Throwable t) {
1039                 GWT.log("", t);
1040                 if (t instanceof RestException) {
1041                     displayError("Unable to create folder: " + ((RestException) t).getHttpStatusText());
1042                 }
1043                 else
1044                     displayError("System error creating folder: " + t.getMessage());
1045             }
1046
1047                         @Override
1048                         protected void onUnauthorized(Response response) {
1049                                 sessionExpired();
1050                         }
1051         };
1052         createFolder.setHeader("X-Auth-Token", getToken());
1053         createFolder.setHeader("Accept", "*/*");
1054         createFolder.setHeader("Content-Length", "0");
1055         createFolder.setHeader("Content-Type", "application/folder");
1056         Scheduler.get().scheduleDeferred(createFolder);
1057     }
1058
1059     public void addSelectionModel(@SuppressWarnings("rawtypes") SingleSelectionModel model) {
1060         selectionModels.add(model);
1061     }
1062
1063         public OtherSharedTreeView getOtherSharedTreeView() {
1064                 return otherSharedTreeView;
1065         }
1066
1067         public void updateTrash(boolean showFiles, Command callback) {
1068                 updateFolder(trash, showFiles, callback);
1069         }
1070
1071         public void updateGroupsNode() {
1072                 groupTreeView.updateGroupNode(null);
1073         }
1074
1075         public void addGroup(String groupname) {
1076                 Group newGroup = new Group(groupname);
1077                 account.addGroup(newGroup);
1078                 groupTreeView.updateGroupNode(null);
1079         }
1080
1081         public void removeGroup(Group group) {
1082                 account.removeGroup(group);
1083                 updateGroupsNode();
1084         }
1085
1086         public TreeView getSelectedTree() {
1087                 return selectedTree;
1088         }
1089
1090         public Folder getSelection() {
1091                 return selectedTree.getSelection();
1092         }
1093
1094         public void showFolderStatistics(int folderFileCount) {
1095                 numOfFiles.setHTML(String.valueOf(folderFileCount));
1096         }
1097
1098         public GroupTreeView getGroupTreeView() {
1099                 return groupTreeView;
1100         }
1101
1102         public void sessionExpired() {
1103                 new SessionExpiredDialog(this).center();
1104         }
1105
1106         public void updateRootFolder(Command callback) {
1107                 updateFolder(account.getPithos(), false, callback);
1108         }
1109 }