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 com.google.gwt.core.client.Scheduler;
  38 import com.google.gwt.core.client.Scheduler.ScheduledCommand;
  39 import com.google.gwt.event.dom.client.ClickEvent;
  40 import com.google.gwt.event.dom.client.ClickHandler;
  41 import com.google.gwt.http.client.Request;
  42 import com.google.gwt.http.client.RequestBuilder;
  43 import com.google.gwt.http.client.RequestCallback;
  44 import com.google.gwt.http.client.RequestException;
  45 import com.google.gwt.http.client.Response;
  46 import com.google.gwt.json.client.JSONArray;
  47 import com.google.gwt.json.client.JSONObject;
  48 import com.google.gwt.json.client.JSONParser;
  49 import com.google.gwt.json.client.JSONString;
  50 import com.google.gwt.json.client.JSONValue;
  51 import com.google.gwt.user.client.Command;
  52 import com.google.gwt.user.client.ui.Button;
  53 import com.google.gwt.user.client.ui.HTML;
  54 import com.google.gwt.user.client.ui.HasHorizontalAlignment.HorizontalAlignmentConstant;
  55 import com.google.gwt.user.client.ui.HasVerticalAlignment;
  56 import com.google.gwt.user.client.ui.HorizontalPanel;
  57 import com.google.gwt.user.client.ui.Image;
  58 import com.google.gwt.user.client.ui.PushButton;
  59 import com.google.gwt.view.client.SelectionChangeEvent;
  60 import com.google.gwt.view.client.SelectionChangeEvent.Handler;
  61 import com.google.gwt.view.client.SingleSelectionModel;
  62 import gr.grnet.pithos.web.client.commands.UploadFileCommand;
  63 import gr.grnet.pithos.web.client.foldertree.AccountResource;
  64 import gr.grnet.pithos.web.client.foldertree.File;
  65 import gr.grnet.pithos.web.client.foldertree.Folder;
  66 import gr.grnet.pithos.web.client.foldertree.FolderTreeView;
  67 import gr.grnet.pithos.web.client.foldertree.FolderTreeViewModel;
  68 import gr.grnet.pithos.web.client.foldertree.Resource;
  69 import gr.grnet.pithos.web.client.rest.DeleteRequest;
  70 import gr.grnet.pithos.web.client.rest.GetRequest;
  71 import gr.grnet.pithos.web.client.rest.PutRequest;
  72 import gr.grnet.pithos.web.client.rest.RestException;
  73
  74 import gr.grnet.pithos.web.client.tagtree.Tag;
  75 import gr.grnet.pithos.web.client.tagtree.TagTreeView;
  76 import gr.grnet.pithos.web.client.tagtree.TagTreeViewModel;
  77 import java.util.ArrayList;
  78 import java.util.Arrays;
  79 import java.util.Date;
  80 import java.util.HashMap;
  81 import java.util.Iterator;
  82 import java.util.List;
  83
  84 import com.google.gwt.core.client.EntryPoint;
  85 import com.google.gwt.core.client.GWT;
  86 import com.google.gwt.event.logical.shared.ResizeEvent;
  87 import com.google.gwt.event.logical.shared.ResizeHandler;
  88 import com.google.gwt.event.logical.shared.SelectionEvent;
  89 import com.google.gwt.event.logical.shared.SelectionHandler;
  90 import com.google.gwt.i18n.client.DateTimeFormat;
  91 import com.google.gwt.resources.client.ClientBundle;
  92 import com.google.gwt.resources.client.ImageResource;
  93 import com.google.gwt.user.client.Cookies;
  94 import com.google.gwt.user.client.Event;
  95 import com.google.gwt.user.client.History;
  96 import com.google.gwt.user.client.Window;
  97 import com.google.gwt.user.client.ui.AbstractImagePrototype;
  98 import com.google.gwt.user.client.ui.DecoratedTabPanel;
  99 import com.google.gwt.user.client.ui.HasHorizontalAlignment;
 100 import com.google.gwt.user.client.ui.HorizontalSplitPanel;
 101 import com.google.gwt.user.client.ui.RootPanel;
 102 import com.google.gwt.user.client.ui.TabPanel;
 103 import com.google.gwt.user.client.ui.VerticalPanel;
 104 import java.util.Set;
 105
 106 /**
 107  * Entry point classes define <code>onModuleLoad()</code>.
 108  */
 109 public class Pithos implements EntryPoint, ResizeHandler {
 110
 111         /**
 112          * A constant that denotes the completion of an IncrementalCommand.
 113          */
 114         public static final boolean DONE = false;
 115
 116         public static final int VISIBLE_FILE_COUNT = 25;
 117
 118         /**
 119          * Instantiate an application-level image bundle. This object will provide
 120          * programmatic access to all the images needed by widgets.
 121          */
 122         private static Images images = (Images) GWT.create(Images.class);
 123
 124     public String getUsername() {
 125         return username;
 126     }
 127
 128     public void setAccount(AccountResource acct) {
 129         account = acct;
 130     }
 131
 132     public AccountResource getAccount() {
 133         return account;
 134     }
 135
 136     public void updateFolder(Folder f, boolean showfiles) {
 137         folderTreeView.updateFolder(f, showfiles);
 138     }
 139
 140     public void updateTag(Tag t) {
 141         tagTreeView.updateTag(t);
 142     }
 143
 144     public void updateTags() {
 145         tagTreeViewModel.initialize(getAllTags());
 146     }
 147
 148     public List<Tag> getAllTags() {
 149         List<Tag> tagList = new ArrayList<Tag>();
 150         for (Folder f : account.getContainers()) {
 151             for (String t : f.getTags()) {
 152                 tagList.add(new Tag(t));
 153             }
 154         }
 155         return tagList;
 156     }
 157
 158     /**
 159          * An aggregate image bundle that pulls together all the images for this
 160          * application into a single bundle.
 161          */
 162         public interface Images extends ClientBundle, TopPanel.Images, FilePropertiesDialog.Images, MessagePanel.Images, FileList.Images {
 163
 164                 @Source("gr/grnet/pithos/resources/document.png")
 165                 ImageResource folders();
 166
 167                 @Source("gr/grnet/pithos/resources/edit_group_22.png")
 168                 ImageResource groups();
 169
 170                 @Source("gr/grnet/pithos/resources/search.png")
 171                 ImageResource search();
 172         }
 173
 174         /**
 175          * The Application Clipboard implementation;
 176          */
 177         private Clipboard clipboard = new Clipboard();
 178
 179         /**
 180          * The top panel that contains the menu bar.
 181          */
 182         private TopPanel topPanel;
 183
 184         /**
 185          * The panel that contains the various system messages.
 186          */
 187         private MessagePanel messagePanel = new MessagePanel(Pithos.images);
 188
 189         /**
 190          * The bottom panel that contains the status bar.
 191          */
 192         private StatusPanel statusPanel = null;
 193
 194         /**
 195          * The file list widget.
 196          */
 197         private FileList fileList;
 198
 199         /**
 200          * The tab panel that occupies the right side of the screen.
 201          */
 202         private VerticalPanel inner = new VerticalPanel();
 203
 204
 205         /**
 206          * The split panel that will contain the left and right panels.
 207          */
 208         private HorizontalSplitPanel splitPanel = new HorizontalSplitPanel();
 209
 210         /**
 211          * The currently selected item in the application, for use by the Edit menu
 212          * commands. Potential types are Folder, File, User and Group.
 213          */
 214         private Object currentSelection;
 215
 216
 217         /**
 218          * The WebDAV password of the current user
 219          */
 220         private String webDAVPassword;
 221
 222         public HashMap<String, String> userFullNameMap = new HashMap<String, String>();
 223
 224     private String username = null;
 225
 226     /**
 227      * The authentication token of the current user.
 228      */
 229     private String token;
 230
 231     private SingleSelectionModel<Folder> folderTreeSelectionModel;
 232     private FolderTreeViewModel folderTreeViewModel;
 233     private FolderTreeView folderTreeView;
 234
 235     private SingleSelectionModel<Tag> tagTreeSelectionModel;
 236     private TagTreeViewModel tagTreeViewModel;
 237     private TagTreeView tagTreeView;
 238
 239     private AccountResource account;
 240
 241         @Override
 242         public void onModuleLoad() {
 243                 if (parseUserCredentials())
 244             initialize();
 245         }
 246
 247     private void initialize() {
 248         VerticalPanel outer = new VerticalPanel();
 249         outer.setWidth("100%");
 250
 251         topPanel = new TopPanel(this, Pithos.images);
 252         topPanel.setWidth("100%");
 253         outer.add(topPanel);
 254
 255         messagePanel.setWidth("100%");
 256         messagePanel.setVisible(false);
 257         outer.add(messagePanel);
 258         outer.setCellHorizontalAlignment(messagePanel, HasHorizontalAlignment.ALIGN_CENTER);
 259
 260
 261         // Inner contains the various lists.
 262         inner.sinkEvents(Event.ONCONTEXTMENU);
 263         inner.setWidth("100%");
 264
 265         HorizontalPanel rightside = new HorizontalPanel();
 266         rightside.addStyleName("pithos-rightSide");
 267         rightside.setSpacing(5);
 268
 269         PushButton parentButton = new PushButton(new Image(images.asc()), new ClickHandler() {
 270             @Override
 271             public void onClick(ClickEvent event) {
 272
 273             }
 274         });
 275         parentButton.addStyleName("pithos-parentButton");
 276         rightside.add(parentButton);
 277
 278         HTML folderStatistics = new HTML("5 Files (size: 1.1GB)");
 279         folderStatistics.addStyleName("pithos-folderStatistics");
 280         rightside.add(folderStatistics);
 281         inner.add(rightside);
 282         inner.setCellHorizontalAlignment(rightside, HasHorizontalAlignment.ALIGN_RIGHT);
 283         inner.setCellVerticalAlignment(rightside, HasVerticalAlignment.ALIGN_MIDDLE);
 284         inner.setCellHeight(rightside, "60px");
 285
 286         folderTreeSelectionModel = new SingleSelectionModel<Folder>();
 287         folderTreeSelectionModel.addSelectionChangeHandler(new SelectionChangeEvent.Handler() {
 288             @Override
 289             public void onSelectionChange(SelectionChangeEvent event) {
 290                 if (folderTreeSelectionModel.getSelectedObject() != null) {
 291                     tagTreeSelectionModel.setSelected(tagTreeSelectionModel.getSelectedObject(), false);
 292                     Folder f = folderTreeSelectionModel.getSelectedObject();
 293                     updateFolder(f, true);
 294                 }
 295             }
 296         });
 297
 298         folderTreeViewModel = new FolderTreeViewModel(this, folderTreeSelectionModel);
 299         folderTreeView = new FolderTreeView(folderTreeViewModel);
 300
 301         fileList = new FileList(this, images, folderTreeView);
 302         inner.add(fileList);
 303
 304         tagTreeSelectionModel = new SingleSelectionModel<Tag>();
 305         tagTreeSelectionModel.addSelectionChangeHandler(new Handler() {
 306             @Override
 307             public void onSelectionChange(SelectionChangeEvent event) {
 308                 if (tagTreeSelectionModel.getSelectedObject() != null) {
 309                     folderTreeSelectionModel.setSelected(folderTreeSelectionModel.getSelectedObject(), false);
 310                     Tag t = tagTreeSelectionModel.getSelectedObject();
 311                     updateTag(t);
 312                 }
 313             }
 314         });
 315         tagTreeViewModel = new TagTreeViewModel(this, tagTreeSelectionModel);
 316         tagTreeView = new TagTreeView(tagTreeViewModel);
 317
 318         VerticalPanel trees = new VerticalPanel();
 319
 320         Button upload = new Button("Upload File", new ClickHandler() {
 321             @Override
 322             public void onClick(ClickEvent event) {
 323                 new UploadFileCommand(Pithos.this, null, folderTreeView.getSelection()).execute();
 324             }
 325         });
 326         upload.addStyleName("pithos-uploadButton");
 327         trees.add(upload);
 328
 329         HorizontalPanel treeHeader = new HorizontalPanel();
 330         treeHeader.addStyleName("pithos-treeHeader");
 331         treeHeader.add(new HTML("Total Files: 6 | Used: 2.1 of 50 GB (4.2%)"));
 332         trees.add(treeHeader);
 333
 334         trees.add(folderTreeView);
 335         trees.add(tagTreeView);
 336         // Add the left and right panels to the split panel.
 337         splitPanel.setLeftWidget(trees);
 338         splitPanel.setRightWidget(inner);
 339         splitPanel.setSplitPosition("25%");
 340         splitPanel.setSize("100%", "100%");
 341         splitPanel.addStyleName("pithos-splitPanel");
 342         outer.add(splitPanel);
 343
 344         statusPanel = new StatusPanel();
 345         outer.add(statusPanel);
 346
 347
 348         // Hook the window resize event, so that we can adjust the UI.
 349         Window.addResizeHandler(this);
 350         // Clear out the window's built-in margin, because we want to take
 351         // advantage of the entire client area.
 352         Window.setMargin("0px");
 353         // Finally, add the outer panel to the RootPanel, so that it will be
 354         // displayed.
 355         RootPanel.get().add(outer);
 356         // Call the window resized handler to get the initial sizes setup. Doing
 357         // this in a deferred command causes it to occur after all widgets'
 358         // sizes have been computed by the browser.
 359         Scheduler.get().scheduleDeferred(new ScheduledCommand() {
 360
 361             @Override
 362             public void execute() {
 363                 onWindowResized(Window.getClientHeight());
 364             }
 365         });
 366
 367         Scheduler.get().scheduleDeferred(new ScheduledCommand() {
 368             @Override
 369             public void execute() {
 370                 fetchAccount();
 371             }
 372         });
 373     }
 374
 375     public void showFiles(Folder f) {
 376         Set<File> files = f.getFiles();
 377         showFiles(files);
 378     }
 379
 380     public void showFiles(Set<File> files) {
 381         //Iterator<File> iter = files.iterator();
 382         //fetchFile(iter, files);
 383         fileList.setFiles(new ArrayList<File>(files));
 384     }
 385
 386     private void fetchFile(final Iterator<File> iter, final Set<File> files) {
 387         if (iter.hasNext()) {
 388             File file = iter.next();
 389             String path = file.getUri() + "?format=json";
 390             GetRequest<File> getFile = new GetRequest<File>(File.class, getApiPath(), username, path, file) {
 391                 @Override
 392                 public void onSuccess(File result) {
 393                     fetchFile(iter, files);
 394                 }
 395
 396                 @Override
 397                 public void onError(Throwable t) {
 398                     GWT.log("Error getting file", t);
 399                     if (t instanceof RestException)
 400                         displayError("Error getting file: " + ((RestException) t).getHttpStatusText());
 401                     else
 402                         displayError("System error fetching file: " + t.getMessage());
 403                 }
 404             };
 405             getFile.setHeader("X-Auth-Token", "0000");
 406             Scheduler.get().scheduleDeferred(getFile);
 407         }
 408         else
 409             fileList.setFiles(new ArrayList<File>(files));
 410     }
 411
 412     /**
 413          * Parse and store the user credentials to the appropriate fields.
 414          */
 415         private boolean parseUserCredentials() {
 416         username = Window.Location.getParameter("user");
 417         token = Window.Location.getParameter("token");
 418         Configuration conf = (Configuration) GWT.create(Configuration.class);
 419         if (username == null || username.length() == 0 || token == null || token.length() == 0) {
 420             String cookie = conf.authCookie();
 421             String auth = Cookies.getCookie(cookie);
 422             if (auth == null) {
 423                 authenticateUser();
 424                 return false;
 425             }
 426             else {
 427                 String[] authSplit = auth.split("\\" + conf.cookieSeparator(), 2);
 428                 if (authSplit.length != 2) {
 429                     authenticateUser();
 430                     return false;
 431                 }
 432                 else {
 433                     username = authSplit[0];
 434                     token = authSplit[1];
 435                     return true;
 436                 }
 437             }
 438         }
 439         else {
 440             Cookies.setCookie(conf.authCookie(), username + conf.cookieSeparator() + token);
 441             return true;
 442         }
 443     }
 444
 445     /**
 446          * Redirect the user to the login page for authentication.
 447          */
 448         protected void authenticateUser() {
 449                 Configuration conf = (Configuration) GWT.create(Configuration.class);
 450         Window.Location.assign(Window.Location.getHost() + conf.loginUrl() + "?next=" + Window.Location.getHref());
 451         }
 452
 453     private void fetchAccount() {
 454         String path = "?format=json";
 455
 456         GetRequest<AccountResource> getAccount = new GetRequest<AccountResource>(AccountResource.class, getApiPath(), username, path) {
 457             @Override
 458             public void onSuccess(AccountResource result) {
 459                 account = result;
 460                 if (account.getContainers().isEmpty())
 461                     createHomeContainers();
 462                 else
 463                     folderTreeViewModel.initialize(account);
 464             }
 465
 466             @Override
 467             public void onError(Throwable t) {
 468                 GWT.log("Error getting account", t);
 469                 if (t instanceof RestException)
 470                     displayError("Error getting account: " + ((RestException) t).getHttpStatusText());
 471                 else
 472                     displayError("System error fetching user data: " + t.getMessage());
 473             }
 474         };
 475         getAccount.setHeader("X-Auth-Token", token);
 476         Scheduler.get().scheduleDeferred(getAccount);
 477     }
 478
 479     private void createHomeContainers() {
 480         String path = "/pithos";
 481         PutRequest createPithos = new PutRequest(getApiPath(), getUsername(), path) {
 482             @Override
 483             public void onSuccess(Resource result) {
 484                 fetchAccount();
 485             }
 486
 487             @Override
 488             public void onError(Throwable t) {
 489                 GWT.log("Error creating pithos", t);
 490                 if (t instanceof RestException)
 491                     displayError("Error creating pithos: " + ((RestException) t).getHttpStatusText());
 492                 else
 493                     displayError("System error Error creating pithos: " + t.getMessage());
 494             }
 495         };
 496         createPithos.setHeader("X-Auth-Token", getToken());
 497         Scheduler.get().scheduleDeferred(createPithos);
 498     }
 499
 500         /**
 501          * Creates an HTML fragment that places an image & caption together, for use
 502          * in a group header.
 503          *
 504          * @param imageProto an image prototype for an image
 505          * @param caption the group caption
 506          * @return the header HTML fragment
 507          */
 508         private String createHeaderHTML(AbstractImagePrototype imageProto, String caption) {
 509                 String captionHTML = "<table class='caption' cellpadding='0' "
 510                 + "cellspacing='0'>" + "<tr><td class='lcaption'>" + imageProto.getHTML()
 511                 + "</td><td id =" + caption +" class='rcaption'><b style='white-space:nowrap'>&nbsp;"
 512                 + caption + "</b></td></tr></table>";
 513                 return captionHTML;
 514         }
 515
 516         private void onWindowResized(int height) {
 517                 // Adjust the split panel to take up the available room in the window.
 518                 int newHeight = height - splitPanel.getAbsoluteTop() - 60;
 519                 if (newHeight < 1)
 520                         newHeight = 1;
 521                 splitPanel.setHeight("" + newHeight);
 522                 inner.setHeight("" + newHeight);
 523         }
 524
 525         @Override
 526         public void onResize(ResizeEvent event) {
 527                 int height = event.getHeight();
 528                 onWindowResized(height);
 529         }
 530
 531         /**
 532          * Display an error message.
 533          *
 534          * @param msg the message to display
 535          */
 536         public void displayError(String msg) {
 537                 messagePanel.displayError(msg);
 538         }
 539
 540         /**
 541          * Display a warning message.
 542          *
 543          * @param msg the message to display
 544          */
 545         public void displayWarning(String msg) {
 546                 messagePanel.displayWarning(msg);
 547         }
 548
 549         /**
 550          * Display an informational message.
 551          *
 552          * @param msg the message to display
 553          */
 554         public void displayInformation(String msg) {
 555                 messagePanel.displayInformation(msg);
 556         }
 557
 558         /**
 559          * Retrieve the fileList.
 560          *
 561          * @return the fileList
 562          */
 563         public FileList getFileList() {
 564                 return fileList;
 565         }
 566
 567         /**
 568          * Retrieve the topPanel.
 569          *
 570          * @return the topPanel
 571          */
 572         TopPanel getTopPanel() {
 573                 return topPanel;
 574         }
 575
 576         /**
 577          * Retrieve the clipboard.
 578          *
 579          * @return the clipboard
 580          */
 581         public Clipboard getClipboard() {
 582                 return clipboard;
 583         }
 584
 585         public StatusPanel getStatusPanel() {
 586                 return statusPanel;
 587         }
 588
 589         public String getToken() {
 590                 return token;
 591         }
 592
 593         public String getWebDAVPassword() {
 594                 return webDAVPassword;
 595         }
 596
 597         public static native void preventIESelection() /*-{
 598                 $doc.body.onselectstart = function () { return false; };
 599         }-*/;
 600
 601         public static native void enableIESelection() /*-{
 602                 if ($doc.body.onselectstart != null)
 603                 $doc.body.onselectstart = null;
 604         }-*/;
 605
 606         /**
 607          * @return the absolute path of the API root URL
 608          */
 609         public String getApiPath() {
 610                 Configuration conf = (Configuration) GWT.create(Configuration.class);
 611                 return conf.apiPath();
 612         }
 613
 614         /**
 615          * History support for folder navigation
 616          * adds a new browser history entry
 617          *
 618          * @param key
 619          */
 620         public void updateHistory(String key){
 621 //              Replace any whitespace of the initial string to "+"
 622 //              String result = key.replaceAll("\\s","+");
 623 //              Add a new browser history entry.
 624 //              History.newItem(result);
 625                 History.newItem(key);
 626         }
 627
 628     public void deleteFolder(final Folder folder) {
 629         String path = getApiPath() + getUsername() + "/" + folder.getContainer() + "?format=json&delimiter=/&prefix=" + folder.getPrefix();
 630         RequestBuilder builder = new RequestBuilder(RequestBuilder.GET, path);
 631         builder.setHeader("If-Modified-Since", "0");
 632         builder.setHeader("X-Auth-Token", getToken());
 633         try {
 634             builder.sendRequest("", new RequestCallback() {
 635                 @Override
 636                 public void onResponseReceived(Request request, Response response) {
 637                     if (response.getStatusCode() == Response.SC_OK) {
 638                         JSONValue json = JSONParser.parseStrict(response.getText());
 639                         JSONArray array = json.isArray();
 640                         int i = 0;
 641                         if (array != null) {
 642                             deleteObject(folder, i, array);
 643                         }
 644                     }
 645                 }
 646
 647                 @Override
 648                 public void onError(Request request, Throwable exception) {
 649                     displayError("System error unable to delete folder: " + exception.getMessage());
 650                 }
 651             });
 652         }
 653         catch (RequestException e) {
 654         }
 655     }
 656
 657     public void deleteObject(final Folder folder, final int i, final JSONArray array) {
 658         if (i < array.size()) {
 659             JSONObject o = array.get(i).isObject();
 660             if (o != null && !o.containsKey("subdir")) {
 661                 JSONString name = o.get("name").isString();
 662                 String path = "/" + folder.getContainer() + "/" + name.stringValue();
 663                 DeleteRequest delete = new DeleteRequest(getApiPath(), getUsername(), path) {
 664                     @Override
 665                     public void onSuccess(Resource result) {
 666                         deleteObject(folder, i + 1, array);
 667                     }
 668
 669                     @Override
 670                     public void onError(Throwable t) {
 671                         GWT.log("", t);
 672                         displayError("System error unable to delete folder: " + t.getMessage());
 673                     }
 674                 };
 675                 delete.setHeader("X-Auth-Token", getToken());
 676                 Scheduler.get().scheduleDeferred(delete);
 677             }
 678             else {
 679                 String subdir = o.get("subdir").isString().stringValue();
 680                 subdir = subdir.substring(0, subdir.length() - 1);
 681                 String path = getApiPath() + getUsername() + "/" + folder.getContainer() + "?format=json&delimiter=/&prefix=" + subdir;
 682                 RequestBuilder builder = new RequestBuilder(RequestBuilder.GET, path);
 683                 builder.setHeader("If-Modified-Since", "0");
 684                 builder.setHeader("X-Auth-Token", getToken());
 685                 try {
 686                     builder.sendRequest("", new RequestCallback() {
 687                         @Override
 688                         public void onResponseReceived(Request request, Response response) {
 689                             if (response.getStatusCode() == Response.SC_OK) {
 690                                 JSONValue json = JSONParser.parseStrict(response.getText());
 691                                 JSONArray array2 = json.isArray();
 692                                 if (array2 != null) {
 693                                     int l = array.size();
 694                                     for (int j=0; j<array2.size(); j++) {
 695                                         array.set(l++, array2.get(j));
 696                                     }
 697                                 }
 698                                 deleteObject(folder, i + 1, array);
 699                             }
 700                         }
 701
 702                         @Override
 703                         public void onError(Request request, Throwable exception) {
 704                             displayError("System error unable to delete folder: " + exception.getMessage());
 705                         }
 706                     });
 707                 }
 708                 catch (RequestException e) {
 709                 }
 710             }
 711         }
 712         else {
 713             String path = folder.getUri();
 714             DeleteRequest deleteFolder = new DeleteRequest(getApiPath(), getUsername(), path) {
 715                 @Override
 716                 public void onSuccess(Resource result) {
 717                     updateFolder(folder.getParent(), true);
 718                 }
 719
 720                 @Override
 721                 public void onError(Throwable t) {
 722                     GWT.log("", t);
 723                     if (t instanceof RestException) {
 724                         displayError("Unable to delete folder: "+((RestException) t).getHttpStatusText());
 725                     }
 726                     else
 727                         displayError("System error unable to delete folder: " + t.getMessage());
 728                 }
 729             };
 730             deleteFolder.setHeader("X-Auth-Token", getToken());
 731             Scheduler.get().scheduleDeferred(deleteFolder);
 732         }
 733     }
 734
 735     public FolderTreeView getFolderTreeView() {
 736         return folderTreeView;
 737     }
 738
 739     public void copyFiles(final Iterator<File> iter, final String targetUri, final Command callback) {
 740         if (iter.hasNext()) {
 741             File file = iter.next();
 742             String path = targetUri + "/" + file.getName();
 743             PutRequest copyFile = new PutRequest(getApiPath(), getUsername(), path) {
 744                 @Override
 745                 public void onSuccess(Resource result) {
 746                     copyFiles(iter, targetUri, callback);
 747                 }
 748
 749                 @Override
 750                 public void onError(Throwable t) {
 751                     GWT.log("", t);
 752                     if (t instanceof RestException) {
 753                         displayError("Unable to copy file: " + ((RestException) t).getHttpStatusText());
 754                     }
 755                     else
 756                         displayError("System error unable to copy file: "+t.getMessage());
 757                 }
 758             };
 759             copyFile.setHeader("X-Auth-Token", getToken());
 760             copyFile.setHeader("X-Copy-From", file.getUri());
 761             Scheduler.get().scheduleDeferred(copyFile);
 762         }
 763         else  if (callback != null) {
 764             callback.execute();
 765         }
 766     }
 767
 768     public void copySubfolders(final Iterator<Folder> iter, final String targetUri, final Command callback) {
 769         if (iter.hasNext()) {
 770             final Folder f = iter.next();
 771             copyFolder(f, targetUri, callback);
 772         }
 773         else  if (callback != null) {
 774             callback.execute();
 775         }
 776     }
 777
 778     public void copyFolder(final Folder f, final String targetUri, final Command callback) {
 779         String path = targetUri + "/" + f.getName();
 780         PutRequest createFolder = new PutRequest(getApiPath(), getUsername(), path) {
 781             @Override
 782             public void onSuccess(Resource result) {
 783                 Iterator<File> iter = f.getFiles().iterator();
 784                 copyFiles(iter, targetUri + "/" + f.getName(), new Command() {
 785                     @Override
 786                     public void execute() {
 787                         Iterator<Folder> iterf = f.getSubfolders().iterator();
 788                         copySubfolders(iterf, targetUri + "/" + f.getName(), new Command() {
 789                             @Override
 790                             public void execute() {
 791                                 callback.execute();
 792                             }
 793                         });
 794                     }
 795                 });
 796             }
 797
 798             @Override
 799             public void onError(Throwable t) {
 800                 GWT.log("", t);
 801                 if (t instanceof RestException) {
 802                     displayError("Unable to create folder:" + ((RestException) t).getHttpStatusText());
 803                 }
 804                 else
 805                     displayError("System error creating folder:" + t.getMessage());
 806             }
 807         };
 808         createFolder.setHeader("X-Auth-Token", getToken());
 809         createFolder.setHeader("Accept", "*/*");
 810         createFolder.setHeader("Content-Length", "0");
 811         createFolder.setHeader("Content-Type", "application/folder");
 812         Scheduler.get().scheduleDeferred(createFolder);
 813     }
 814 }