code.grnet.gr Git - pithos-web-client/blob - 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.SelectionModel;
  62 import com.google.gwt.view.client.SingleSelectionModel;
  63 import com.google.gwt.view.client.TreeViewModel;
  64 import gr.grnet.pithos.web.client.commands.UploadFileCommand;
  65 import gr.grnet.pithos.web.client.foldertree.AccountResource;
  66 import gr.grnet.pithos.web.client.foldertree.File;
  67 import gr.grnet.pithos.web.client.foldertree.Folder;
  68 import gr.grnet.pithos.web.client.foldertree.FolderTreeView;
  69 import gr.grnet.pithos.web.client.foldertree.FolderTreeViewModel;
  70 import gr.grnet.pithos.web.client.foldertree.Resource;
  71 import gr.grnet.pithos.web.client.mysharedtree.MysharedTreeView;
  72 import gr.grnet.pithos.web.client.mysharedtree.MysharedTreeViewModel;
  73 import gr.grnet.pithos.web.client.rest.DeleteRequest;
  74 import gr.grnet.pithos.web.client.rest.GetRequest;
  75 import gr.grnet.pithos.web.client.rest.PutRequest;
  76 import gr.grnet.pithos.web.client.rest.RestException;
  77
  78 import gr.grnet.pithos.web.client.tagtree.Tag;
  79 import gr.grnet.pithos.web.client.tagtree.TagTreeView;
  80 import gr.grnet.pithos.web.client.tagtree.TagTreeViewModel;
  81 import java.util.ArrayList;
  82 import java.util.Arrays;
  83 import java.util.Date;
  84 import java.util.HashMap;
  85 import java.util.Iterator;
  86 import java.util.List;
  87
  88 import com.google.gwt.core.client.EntryPoint;
  89 import com.google.gwt.core.client.GWT;
  90 import com.google.gwt.event.logical.shared.ResizeEvent;
  91 import com.google.gwt.event.logical.shared.ResizeHandler;
  92 import com.google.gwt.event.logical.shared.SelectionEvent;
  93 import com.google.gwt.event.logical.shared.SelectionHandler;
  94 import com.google.gwt.i18n.client.DateTimeFormat;
  95 import com.google.gwt.resources.client.ClientBundle;
  96 import com.google.gwt.resources.client.ImageResource;
  97 import com.google.gwt.user.client.Cookies;
  98 import com.google.gwt.user.client.Event;
  99 import com.google.gwt.user.client.History;
 100 import com.google.gwt.user.client.Window;
 101 import com.google.gwt.user.client.ui.AbstractImagePrototype;
 102 import com.google.gwt.user.client.ui.DecoratedTabPanel;
 103 import com.google.gwt.user.client.ui.HasHorizontalAlignment;
 104 import com.google.gwt.user.client.ui.HorizontalSplitPanel;
 105 import com.google.gwt.user.client.ui.RootPanel;
 106 import com.google.gwt.user.client.ui.TabPanel;
 107 import com.google.gwt.user.client.ui.VerticalPanel;
 108 import java.util.Set;
 109
 110 /**
 111  * Entry point classes define <code>onModuleLoad()</code>.
 112  */
 113 public class Pithos implements EntryPoint, ResizeHandler {
 114
 115         public static final String HOME_CONTAINER = "pithos";
 116
 117         /**
 118          * Instantiate an application-level image bundle. This object will provide
 119          * programmatic access to all the images needed by widgets.
 120          */
 121         private static Images images = (Images) GWT.create(Images.class);
 122
 123     public String getUsername() {
 124         return username;
 125     }
 126
 127     public void setAccount(AccountResource acct) {
 128         account = acct;
 129     }
 130
 131     public AccountResource getAccount() {
 132         return account;
 133     }
 134
 135     public void updateFolder(Folder f, boolean showfiles) {
 136         folderTreeView.updateFolder(f, showfiles);
 137     }
 138
 139     public void updateSharedFolder(Folder f, boolean showfiles) {
 140         mysharedTreeView.updateFolder(f, showfiles);
 141     }
 142
 143     public void updateTag(Tag t) {
 144         tagTreeView.updateTag(t);
 145     }
 146
 147     public void updateTags() {
 148         tagTreeViewModel.initialize(getAllTags());
 149     }
 150
 151     public List<Tag> getAllTags() {
 152         List<Tag> tagList = new ArrayList<Tag>();
 153         for (Folder f : account.getContainers()) {
 154             for (String t : f.getTags()) {
 155                 tagList.add(new Tag(t));
 156             }
 157         }
 158         return tagList;
 159     }
 160
 161     public MysharedTreeView getMySharedTreeView() {
 162         return mysharedTreeView;
 163     }
 164
 165     /**
 166          * An aggregate image bundle that pulls together all the images for this
 167          * application into a single bundle.
 168          */
 169         public interface Images extends ClientBundle, TopPanel.Images, FilePropertiesDialog.Images, MessagePanel.Images, FileList.Images {
 170
 171                 @Source("gr/grnet/pithos/resources/document.png")
 172                 ImageResource folders();
 173
 174                 @Source("gr/grnet/pithos/resources/edit_group_22.png")
 175                 ImageResource groups();
 176
 177                 @Source("gr/grnet/pithos/resources/search.png")
 178                 ImageResource search();
 179         }
 180
 181         /**
 182          * The Application Clipboard implementation;
 183          */
 184         private Clipboard clipboard = new Clipboard();
 185
 186         /**
 187          * The top panel that contains the menu bar.
 188          */
 189         private TopPanel topPanel;
 190
 191         /**
 192          * The panel that contains the various system messages.
 193          */
 194         private MessagePanel messagePanel = new MessagePanel(Pithos.images);
 195
 196         /**
 197          * The bottom panel that contains the status bar.
 198          */
 199         private StatusPanel statusPanel = null;
 200
 201         /**
 202          * The file list widget.
 203          */
 204         private FileList fileList;
 205
 206         /**
 207          * The tab panel that occupies the right side of the screen.
 208          */
 209         private VerticalPanel inner = new VerticalPanel();
 210
 211
 212         /**
 213          * The split panel that will contain the left and right panels.
 214          */
 215         private HorizontalSplitPanel splitPanel = new HorizontalSplitPanel();
 216
 217         /**
 218          * The currently selected item in the application, for use by the Edit menu
 219          * commands. Potential types are Folder, File, User and Group.
 220          */
 221         private Object currentSelection;
 222
 223
 224         /**
 225          * The WebDAV password of the current user
 226          */
 227         private String webDAVPassword;
 228
 229         public HashMap<String, String> userFullNameMap = new HashMap<String, String>();
 230
 231     private String username = null;
 232
 233     /**
 234      * The authentication token of the current user.
 235      */
 236     private String token;
 237
 238     private SingleSelectionModel<Folder> folderTreeSelectionModel;
 239     private FolderTreeViewModel folderTreeViewModel;
 240     private FolderTreeView folderTreeView;
 241
 242     private SingleSelectionModel<Folder> mysharedTreeSelectionModel;
 243     private MysharedTreeViewModel mysharedTreeViewModel;
 244     private MysharedTreeView mysharedTreeView;
 245
 246     private SingleSelectionModel<Tag> tagTreeSelectionModel;
 247     private TagTreeViewModel tagTreeViewModel;
 248     private TagTreeView tagTreeView;
 249
 250     private AccountResource account;
 251
 252     private List<SingleSelectionModel> selectionModels = new ArrayList<SingleSelectionModel>();
 253
 254         @Override
 255         public void onModuleLoad() {
 256                 if (parseUserCredentials())
 257             initialize();
 258         }
 259
 260     private void initialize() {
 261         VerticalPanel outer = new VerticalPanel();
 262         outer.setWidth("100%");
 263
 264         topPanel = new TopPanel(this, Pithos.images);
 265         topPanel.setWidth("100%");
 266         outer.add(topPanel);
 267
 268         messagePanel.setWidth("100%");
 269         messagePanel.setVisible(false);
 270         outer.add(messagePanel);
 271         outer.setCellHorizontalAlignment(messagePanel, HasHorizontalAlignment.ALIGN_CENTER);
 272
 273
 274         // Inner contains the various lists.
 275         inner.sinkEvents(Event.ONCONTEXTMENU);
 276         inner.setWidth("100%");
 277
 278         HorizontalPanel rightside = new HorizontalPanel();
 279         rightside.addStyleName("pithos-rightSide");
 280         rightside.setSpacing(5);
 281
 282         PushButton parentButton = new PushButton(new Image(images.asc()), new ClickHandler() {
 283             @Override
 284             public void onClick(ClickEvent event) {
 285
 286             }
 287         });
 288         parentButton.addStyleName("pithos-parentButton");
 289         rightside.add(parentButton);
 290
 291         HTML folderStatistics = new HTML("5 Files (size: 1.1GB)");
 292         folderStatistics.addStyleName("pithos-folderStatistics");
 293         rightside.add(folderStatistics);
 294         inner.add(rightside);
 295         inner.setCellHorizontalAlignment(rightside, HasHorizontalAlignment.ALIGN_RIGHT);
 296         inner.setCellVerticalAlignment(rightside, HasVerticalAlignment.ALIGN_MIDDLE);
 297         inner.setCellHeight(rightside, "60px");
 298
 299         folderTreeSelectionModel = new SingleSelectionModel<Folder>();
 300         folderTreeSelectionModel.addSelectionChangeHandler(new SelectionChangeEvent.Handler() {
 301             @Override
 302             public void onSelectionChange(SelectionChangeEvent event) {
 303                 if (folderTreeSelectionModel.getSelectedObject() != null) {
 304                     deselectOthers(folderTreeSelectionModel);
 305                     Folder f = folderTreeSelectionModel.getSelectedObject();
 306                     updateFolder(f, true);
 307                 }
 308             }
 309         });
 310         selectionModels.add(folderTreeSelectionModel);
 311
 312         folderTreeViewModel = new FolderTreeViewModel(this, folderTreeSelectionModel);
 313         folderTreeView = new FolderTreeView(folderTreeViewModel);
 314
 315         fileList = new FileList(this, images, folderTreeView);
 316         inner.add(fileList);
 317
 318         mysharedTreeSelectionModel = new SingleSelectionModel<Folder>();
 319         mysharedTreeSelectionModel.addSelectionChangeHandler(new Handler() {
 320             @Override
 321             public void onSelectionChange(SelectionChangeEvent event) {
 322                 if (mysharedTreeSelectionModel.getSelectedObject() != null) {
 323                     deselectOthers(mysharedTreeSelectionModel);
 324                     updateSharedFolder(mysharedTreeSelectionModel.getSelectedObject(), true);
 325                 }
 326             }
 327         });
 328         selectionModels.add(mysharedTreeSelectionModel);
 329         mysharedTreeViewModel = new MysharedTreeViewModel(this, mysharedTreeSelectionModel);
 330         mysharedTreeView = new MysharedTreeView(mysharedTreeViewModel);
 331
 332         tagTreeSelectionModel = new SingleSelectionModel<Tag>();
 333         tagTreeSelectionModel.addSelectionChangeHandler(new Handler() {
 334             @Override
 335             public void onSelectionChange(SelectionChangeEvent event) {
 336                 if (tagTreeSelectionModel.getSelectedObject() != null) {
 337                     deselectOthers(tagTreeSelectionModel);
 338                     Tag t = tagTreeSelectionModel.getSelectedObject();
 339                     updateTag(t);
 340                 }
 341             }
 342         });
 343         selectionModels.add(tagTreeSelectionModel);
 344         tagTreeViewModel = new TagTreeViewModel(this, tagTreeSelectionModel);
 345         tagTreeView = new TagTreeView(tagTreeViewModel);
 346
 347         VerticalPanel trees = new VerticalPanel();
 348
 349         Button upload = new Button("Upload File", new ClickHandler() {
 350             @Override
 351             public void onClick(ClickEvent event) {
 352                 new UploadFileCommand(Pithos.this, null, folderTreeView.getSelection()).execute();
 353             }
 354         });
 355         upload.addStyleName("pithos-uploadButton");
 356         trees.add(upload);
 357
 358         HorizontalPanel treeHeader = new HorizontalPanel();
 359         treeHeader.addStyleName("pithos-treeHeader");
 360         treeHeader.add(new HTML("Total Files: 6 | Used: 2.1 of 50 GB (4.2%)"));
 361         trees.add(treeHeader);
 362
 363         trees.add(folderTreeView);
 364         trees.add(mysharedTreeView);
 365 //        trees.add(tagTreeView);
 366         // Add the left and right panels to the split panel.
 367         splitPanel.setLeftWidget(trees);
 368         splitPanel.setRightWidget(inner);
 369         splitPanel.setSplitPosition("25%");
 370         splitPanel.setSize("100%", "100%");
 371         splitPanel.addStyleName("pithos-splitPanel");
 372         outer.add(splitPanel);
 373
 374         statusPanel = new StatusPanel();
 375         outer.add(statusPanel);
 376
 377
 378         // Hook the window resize event, so that we can adjust the UI.
 379         Window.addResizeHandler(this);
 380         // Clear out the window's built-in margin, because we want to take
 381         // advantage of the entire client area.
 382         Window.setMargin("0px");
 383         // Finally, add the outer panel to the RootPanel, so that it will be
 384         // displayed.
 385         RootPanel.get().add(outer);
 386         // Call the window resized handler to get the initial sizes setup. Doing
 387         // this in a deferred command causes it to occur after all widgets'
 388         // sizes have been computed by the browser.
 389         Scheduler.get().scheduleDeferred(new ScheduledCommand() {
 390
 391             @Override
 392             public void execute() {
 393                 onWindowResized(Window.getClientHeight());
 394             }
 395         });
 396
 397         Scheduler.get().scheduleDeferred(new ScheduledCommand() {
 398             @Override
 399             public void execute() {
 400                 fetchAccount();
 401             }
 402         });
 403     }
 404
 405     public void deselectOthers(SingleSelectionModel model) {
 406         for (SingleSelectionModel s : selectionModels)
 407             if (!s.equals(model))
 408                 s.setSelected(s.getSelectedObject(), false);
 409     }
 410
 411     public void showFiles(Folder f) {
 412         Set<File> files = f.getFiles();
 413         showFiles(files);
 414     }
 415
 416     public void showFiles(Set<File> files) {
 417         //Iterator<File> iter = files.iterator();
 418         //fetchFile(iter, files);
 419         fileList.setFiles(new ArrayList<File>(files));
 420     }
 421
 422     private void fetchFile(final Iterator<File> iter, final Set<File> files) {
 423         if (iter.hasNext()) {
 424             File file = iter.next();
 425             String path = file.getUri() + "?format=json";
 426             GetRequest<File> getFile = new GetRequest<File>(File.class, getApiPath(), username, path, file) {
 427                 @Override
 428                 public void onSuccess(File result) {
 429                     fetchFile(iter, files);
 430                 }
 431
 432                 @Override
 433                 public void onError(Throwable t) {
 434                     GWT.log("Error getting file", t);
 435                     if (t instanceof RestException)
 436                         displayError("Error getting file: " + ((RestException) t).getHttpStatusText());
 437                     else
 438                         displayError("System error fetching file: " + t.getMessage());
 439                 }
 440             };
 441             getFile.setHeader("X-Auth-Token", "0000");
 442             Scheduler.get().scheduleDeferred(getFile);
 443         }
 444         else
 445             fileList.setFiles(new ArrayList<File>(files));
 446     }
 447
 448     /**
 449          * Parse and store the user credentials to the appropriate fields.
 450          */
 451         private boolean parseUserCredentials() {
 452         username = Window.Location.getParameter("user");
 453         token = Window.Location.getParameter("token");
 454         Configuration conf = (Configuration) GWT.create(Configuration.class);
 455         if (username == null || username.length() == 0 || token == null || token.length() == 0) {
 456             String cookie = conf.authCookie();
 457             String auth = Cookies.getCookie(cookie);
 458             if (auth == null) {
 459                 authenticateUser();
 460                 return false;
 461             }
 462             else {
 463                 String[] authSplit = auth.split("\\" + conf.cookieSeparator(), 2);
 464                 if (authSplit.length != 2) {
 465                     authenticateUser();
 466                     return false;
 467                 }
 468                 else {
 469                     username = authSplit[0];
 470                     token = authSplit[1];
 471                     return true;
 472                 }
 473             }
 474         }
 475         else {
 476             Cookies.setCookie(conf.authCookie(), username + conf.cookieSeparator() + token);
 477             return true;
 478         }
 479     }
 480
 481     /**
 482          * Redirect the user to the login page for authentication.
 483          */
 484         protected void authenticateUser() {
 485                 Configuration conf = (Configuration) GWT.create(Configuration.class);
 486         Window.Location.assign(Window.Location.getHost() + conf.loginUrl() + "?next=" + Window.Location.getHref());
 487         }
 488
 489     private void fetchAccount() {
 490         String path = "?format=json";
 491
 492         GetRequest<AccountResource> getAccount = new GetRequest<AccountResource>(AccountResource.class, getApiPath(), username, path) {
 493             @Override
 494             public void onSuccess(AccountResource result) {
 495                 account = result;
 496                 if (account.getContainers().isEmpty())
 497                     createHomeContainers();
 498                 else {
 499                     folderTreeViewModel.initialize(account);
 500                 }
 501             }
 502
 503             @Override
 504             public void onError(Throwable t) {
 505                 GWT.log("Error getting account", t);
 506                 if (t instanceof RestException)
 507                     displayError("Error getting account: " + ((RestException) t).getHttpStatusText());
 508                 else
 509                     displayError("System error fetching user data: " + t.getMessage());
 510             }
 511         };
 512         getAccount.setHeader("X-Auth-Token", token);
 513         Scheduler.get().scheduleDeferred(getAccount);
 514     }
 515
 516     private void createHomeContainers() {
 517         String path = "/pithos";
 518         PutRequest createPithos = new PutRequest(getApiPath(), getUsername(), path) {
 519             @Override
 520             public void onSuccess(Resource result) {
 521                 fetchAccount();
 522             }
 523
 524             @Override
 525             public void onError(Throwable t) {
 526                 GWT.log("Error creating pithos", t);
 527                 if (t instanceof RestException)
 528                     displayError("Error creating pithos: " + ((RestException) t).getHttpStatusText());
 529                 else
 530                     displayError("System error Error creating pithos: " + t.getMessage());
 531             }
 532         };
 533         createPithos.setHeader("X-Auth-Token", getToken());
 534         Scheduler.get().scheduleDeferred(createPithos);
 535     }
 536
 537         /**
 538          * Creates an HTML fragment that places an image & caption together, for use
 539          * in a group header.
 540          *
 541          * @param imageProto an image prototype for an image
 542          * @param caption the group caption
 543          * @return the header HTML fragment
 544          */
 545         private String createHeaderHTML(AbstractImagePrototype imageProto, String caption) {
 546                 String captionHTML = "<table class='caption' cellpadding='0' "
 547                 + "cellspacing='0'>" + "<tr><td class='lcaption'>" + imageProto.getHTML()
 548                 + "</td><td id =" + caption +" class='rcaption'><b style='white-space:nowrap'>&nbsp;"
 549                 + caption + "</b></td></tr></table>";
 550                 return captionHTML;
 551         }
 552
 553         private void onWindowResized(int height) {
 554                 // Adjust the split panel to take up the available room in the window.
 555                 int newHeight = height - splitPanel.getAbsoluteTop() - 60;
 556                 if (newHeight < 1)
 557                         newHeight = 1;
 558                 splitPanel.setHeight("" + newHeight);
 559                 inner.setHeight("" + newHeight);
 560         }
 561
 562         @Override
 563         public void onResize(ResizeEvent event) {
 564                 int height = event.getHeight();
 565                 onWindowResized(height);
 566         }
 567
 568         /**
 569          * Display an error message.
 570          *
 571          * @param msg the message to display
 572          */
 573         public void displayError(String msg) {
 574                 messagePanel.displayError(msg);
 575         }
 576
 577         /**
 578          * Display a warning message.
 579          *
 580          * @param msg the message to display
 581          */
 582         public void displayWarning(String msg) {
 583                 messagePanel.displayWarning(msg);
 584         }
 585
 586         /**
 587          * Display an informational message.
 588          *
 589          * @param msg the message to display
 590          */
 591         public void displayInformation(String msg) {
 592                 messagePanel.displayInformation(msg);
 593         }
 594
 595         /**
 596          * Retrieve the fileList.
 597          *
 598          * @return the fileList
 599          */
 600         public FileList getFileList() {
 601                 return fileList;
 602         }
 603
 604         /**
 605          * Retrieve the topPanel.
 606          *
 607          * @return the topPanel
 608          */
 609         TopPanel getTopPanel() {
 610                 return topPanel;
 611         }
 612
 613         /**
 614          * Retrieve the clipboard.
 615          *
 616          * @return the clipboard
 617          */
 618         public Clipboard getClipboard() {
 619                 return clipboard;
 620         }
 621
 622         public StatusPanel getStatusPanel() {
 623                 return statusPanel;
 624         }
 625
 626         public String getToken() {
 627                 return token;
 628         }
 629
 630         public String getWebDAVPassword() {
 631                 return webDAVPassword;
 632         }
 633
 634         public static native void preventIESelection() /*-{
 635                 $doc.body.onselectstart = function () { return false; };
 636         }-*/;
 637
 638         public static native void enableIESelection() /*-{
 639                 if ($doc.body.onselectstart != null)
 640                 $doc.body.onselectstart = null;
 641         }-*/;
 642
 643         /**
 644          * @return the absolute path of the API root URL
 645          */
 646         public String getApiPath() {
 647                 Configuration conf = (Configuration) GWT.create(Configuration.class);
 648                 return conf.apiPath();
 649         }
 650
 651         /**
 652          * History support for folder navigation
 653          * adds a new browser history entry
 654          *
 655          * @param key
 656          */
 657         public void updateHistory(String key){
 658 //              Replace any whitespace of the initial string to "+"
 659 //              String result = key.replaceAll("\\s","+");
 660 //              Add a new browser history entry.
 661 //              History.newItem(result);
 662                 History.newItem(key);
 663         }
 664
 665     public void deleteFolder(final Folder folder) {
 666         String path = getApiPath() + getUsername() + "/" + folder.getContainer() + "?format=json&delimiter=/&prefix=" + folder.getPrefix();
 667         RequestBuilder builder = new RequestBuilder(RequestBuilder.GET, path);
 668         builder.setHeader("If-Modified-Since", "0");
 669         builder.setHeader("X-Auth-Token", getToken());
 670         try {
 671             builder.sendRequest("", new RequestCallback() {
 672                 @Override
 673                 public void onResponseReceived(Request request, Response response) {
 674                     if (response.getStatusCode() == Response.SC_OK) {
 675                         JSONValue json = JSONParser.parseStrict(response.getText());
 676                         JSONArray array = json.isArray();
 677                         int i = 0;
 678                         if (array != null) {
 679                             deleteObject(folder, i, array);
 680                         }
 681                     }
 682                 }
 683
 684                 @Override
 685                 public void onError(Request request, Throwable exception) {
 686                     displayError("System error unable to delete folder: " + exception.getMessage());
 687                 }
 688             });
 689         }
 690         catch (RequestException e) {
 691         }
 692     }
 693
 694     public void deleteObject(final Folder folder, final int i, final JSONArray array) {
 695         if (i < array.size()) {
 696             JSONObject o = array.get(i).isObject();
 697             if (o != null && !o.containsKey("subdir")) {
 698                 JSONString name = o.get("name").isString();
 699                 String path = "/" + folder.getContainer() + "/" + name.stringValue();
 700                 DeleteRequest delete = new DeleteRequest(getApiPath(), getUsername(), path) {
 701                     @Override
 702                     public void onSuccess(Resource result) {
 703                         deleteObject(folder, i + 1, array);
 704                     }
 705
 706                     @Override
 707                     public void onError(Throwable t) {
 708                         GWT.log("", t);
 709                         displayError("System error unable to delete folder: " + t.getMessage());
 710                     }
 711                 };
 712                 delete.setHeader("X-Auth-Token", getToken());
 713                 Scheduler.get().scheduleDeferred(delete);
 714             }
 715             else {
 716                 String subdir = o.get("subdir").isString().stringValue();
 717                 subdir = subdir.substring(0, subdir.length() - 1);
 718                 String path = getApiPath() + getUsername() + "/" + folder.getContainer() + "?format=json&delimiter=/&prefix=" + subdir;
 719                 RequestBuilder builder = new RequestBuilder(RequestBuilder.GET, path);
 720                 builder.setHeader("If-Modified-Since", "0");
 721                 builder.setHeader("X-Auth-Token", getToken());
 722                 try {
 723                     builder.sendRequest("", new RequestCallback() {
 724                         @Override
 725                         public void onResponseReceived(Request request, Response response) {
 726                             if (response.getStatusCode() == Response.SC_OK) {
 727                                 JSONValue json = JSONParser.parseStrict(response.getText());
 728                                 JSONArray array2 = json.isArray();
 729                                 if (array2 != null) {
 730                                     int l = array.size();
 731                                     for (int j=0; j<array2.size(); j++) {
 732                                         array.set(l++, array2.get(j));
 733                                     }
 734                                 }
 735                                 deleteObject(folder, i + 1, array);
 736                             }
 737                         }
 738
 739                         @Override
 740                         public void onError(Request request, Throwable exception) {
 741                             displayError("System error unable to delete folder: " + exception.getMessage());
 742                         }
 743                     });
 744                 }
 745                 catch (RequestException e) {
 746                 }
 747             }
 748         }
 749         else {
 750             String path = folder.getUri();
 751             DeleteRequest deleteFolder = new DeleteRequest(getApiPath(), getUsername(), path) {
 752                 @Override
 753                 public void onSuccess(Resource result) {
 754                     updateFolder(folder.getParent(), true);
 755                 }
 756
 757                 @Override
 758                 public void onError(Throwable t) {
 759                     GWT.log("", t);
 760                     if (t instanceof RestException) {
 761                         displayError("Unable to delete folder: "+((RestException) t).getHttpStatusText());
 762                     }
 763                     else
 764                         displayError("System error unable to delete folder: " + t.getMessage());
 765                 }
 766             };
 767             deleteFolder.setHeader("X-Auth-Token", getToken());
 768             Scheduler.get().scheduleDeferred(deleteFolder);
 769         }
 770     }
 771
 772     public FolderTreeView getFolderTreeView() {
 773         return folderTreeView;
 774     }
 775
 776     public void copyFiles(final Iterator<File> iter, final String targetUri, final Command callback) {
 777         if (iter.hasNext()) {
 778             File file = iter.next();
 779             String path = targetUri + "/" + file.getName();
 780             PutRequest copyFile = new PutRequest(getApiPath(), getUsername(), path) {
 781                 @Override
 782                 public void onSuccess(Resource result) {
 783                     copyFiles(iter, targetUri, callback);
 784                 }
 785
 786                 @Override
 787                 public void onError(Throwable t) {
 788                     GWT.log("", t);
 789                     if (t instanceof RestException) {
 790                         displayError("Unable to copy file: " + ((RestException) t).getHttpStatusText());
 791                     }
 792                     else
 793                         displayError("System error unable to copy file: "+t.getMessage());
 794                 }
 795             };
 796             copyFile.setHeader("X-Auth-Token", getToken());
 797             copyFile.setHeader("X-Copy-From", file.getUri());
 798             Scheduler.get().scheduleDeferred(copyFile);
 799         }
 800         else  if (callback != null) {
 801             callback.execute();
 802         }
 803     }
 804
 805     public void copySubfolders(final Iterator<Folder> iter, final String targetUri, final Command callback) {
 806         if (iter.hasNext()) {
 807             final Folder f = iter.next();
 808             copyFolder(f, targetUri, callback);
 809         }
 810         else  if (callback != null) {
 811             callback.execute();
 812         }
 813     }
 814
 815     public void copyFolder(final Folder f, final String targetUri, final Command callback) {
 816         String path = targetUri + "/" + f.getName();
 817         PutRequest createFolder = new PutRequest(getApiPath(), getUsername(), path) {
 818             @Override
 819             public void onSuccess(Resource result) {
 820                 Iterator<File> iter = f.getFiles().iterator();
 821                 copyFiles(iter, targetUri + "/" + f.getName(), new Command() {
 822                     @Override
 823                     public void execute() {
 824                         Iterator<Folder> iterf = f.getSubfolders().iterator();
 825                         copySubfolders(iterf, targetUri + "/" + f.getName(), new Command() {
 826                             @Override
 827                             public void execute() {
 828                                 callback.execute();
 829                             }
 830                         });
 831                     }
 832                 });
 833             }
 834
 835             @Override
 836             public void onError(Throwable t) {
 837                 GWT.log("", t);
 838                 if (t instanceof RestException) {
 839                     displayError("Unable to create folder:" + ((RestException) t).getHttpStatusText());
 840                 }
 841                 else
 842                     displayError("System error creating folder:" + t.getMessage());
 843             }
 844         };
 845         createFolder.setHeader("X-Auth-Token", getToken());
 846         createFolder.setHeader("Accept", "*/*");
 847         createFolder.setHeader("Content-Length", "0");
 848         createFolder.setHeader("Content-Type", "application/folder");
 849         Scheduler.get().scheduleDeferred(createFolder);
 850     }
 851
 852     public void addSelectionModel(SingleSelectionModel model) {
 853         selectionModels.add(model);
 854     }
 855 }