code.grnet.gr Git - pithos/blob - src/gr/ebs/gss/client/FileUploadDialog.java

   1 /*\r
   2  * Copyright 2007, 2008, 2009 Electronic Business Systems Ltd.\r
   3  *\r
   4  * This file is part of GSS.\r
   5  *\r
   6  * GSS is free software: you can redistribute it and/or modify\r
   7  * it under the terms of the GNU General Public License as published by\r
   8  * the Free Software Foundation, either version 3 of the License, or\r
   9  * (at your option) any later version.\r
  10  *\r
  11  * GSS is distributed in the hope that it will be useful,\r
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of\r
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the\r
  14  * GNU General Public License for more details.\r
  15  *\r
  16  * You should have received a copy of the GNU General Public License\r
  17  * along with GSS.  If not, see <http://www.gnu.org/licenses/>.\r
  18  */\r
  19 package gr.ebs.gss.client;\r
  20 \r
  21 import gr.ebs.gss.client.rest.GetCommand;\r
  22 import gr.ebs.gss.client.rest.PostCommand;\r
  23 import gr.ebs.gss.client.rest.RestCommand;\r
  24 import gr.ebs.gss.client.rest.RestException;\r
  25 import gr.ebs.gss.client.rest.resource.FileResource;\r
  26 import gr.ebs.gss.client.rest.resource.FolderResource;\r
  27 import gr.ebs.gss.client.rest.resource.UploadStatusResource;\r
  28 \r
  29 import java.util.ArrayList;\r
  30 import java.util.List;\r
  31 \r
  32 import com.google.gwt.core.client.GWT;\r
  33 import com.google.gwt.dom.client.NativeEvent;\r
  34 import com.google.gwt.event.dom.client.ClickEvent;\r
  35 import com.google.gwt.event.dom.client.ClickHandler;\r
  36 import com.google.gwt.event.dom.client.KeyCodes;\r
  37 import com.google.gwt.http.client.URL;\r
  38 import com.google.gwt.json.client.JSONObject;\r
  39 import com.google.gwt.json.client.JSONString;\r
  40 import com.google.gwt.user.client.DeferredCommand;\r
  41 import com.google.gwt.user.client.Timer;\r
  42 import com.google.gwt.user.client.Event.NativePreviewEvent;\r
  43 import com.google.gwt.user.client.ui.Button;\r
  44 import com.google.gwt.user.client.ui.DialogBox;\r
  45 import com.google.gwt.user.client.ui.FileUpload;\r
  46 import com.google.gwt.user.client.ui.FormPanel;\r
  47 import com.google.gwt.user.client.ui.Grid;\r
  48 import com.google.gwt.user.client.ui.HTML;\r
  49 import com.google.gwt.user.client.ui.HasHorizontalAlignment;\r
  50 import com.google.gwt.user.client.ui.Hidden;\r
  51 import com.google.gwt.user.client.ui.HorizontalPanel;\r
  52 import com.google.gwt.user.client.ui.Label;\r
  53 import com.google.gwt.user.client.ui.VerticalPanel;\r
  54 import com.google.gwt.user.client.ui.FormPanel.SubmitCompleteEvent;\r
  55 import com.google.gwt.user.client.ui.FormPanel.SubmitCompleteHandler;\r
  56 import com.google.gwt.user.client.ui.FormPanel.SubmitEvent;\r
  57 import com.google.gwt.user.client.ui.FormPanel.SubmitHandler;\r
  58 \r
  59 /**\r
  60  * The 'File upload' dialog box implementation.\r
  61  */\r
  62 public class FileUploadDialog extends DialogBox implements Updateable {\r
  63 \r
  64         protected int prgBarInterval = 1500;\r
  65 \r
  66         private ProgressBar progressBar;\r
  67 \r
  68         protected RepeatingTimer repeater = new RepeatingTimer(this, prgBarInterval);\r
  69 \r
  70         public static final boolean DONE = true;\r
  71 \r
  72         /**\r
  73          * The Form element that performs the file upload.\r
  74          */\r
  75         private final FormPanel form = new FormPanel();\r
  76 \r
  77         private final FileUpload upload = new FileUpload();\r
  78 \r
  79         protected final Label filenameLabel = new Label("");\r
  80 \r
  81         protected List<FileResource> files;\r
  82 \r
  83         protected boolean cancelEvent = false;\r
  84 \r
  85         protected String fileNameToUse;\r
  86 \r
  87         protected FolderResource folder;\r
  88 \r
  89         /**\r
  90          * The widget's constructor.\r
  91          */\r
  92         public FileUploadDialog() {\r
  93                 // Set the dialog's caption.\r
  94                 setText("File upload");\r
  95                 setAnimationEnabled(true);\r
  96                 // Since we're going to add a FileUpload widget, we'll need to set the\r
  97                 // form to use the POST method, and multipart MIME encoding.\r
  98                 form.setEncoding(FormPanel.ENCODING_MULTIPART);\r
  99                 form.setMethod(FormPanel.METHOD_POST);\r
 100 \r
 101                 // Create a panel to hold all of the form widgets.\r
 102                 VerticalPanel panel = new VerticalPanel();\r
 103                 form.setWidget(panel);\r
 104                 final HTML info = new HTML("You may select a file to upload. Install" +\r
 105                                 " <a href='http://gears.google.com/' target='_blank'>Google " +\r
 106                                 "Gears</a><br> for uploading multiple files simultaneously.");\r
 107                 info.addStyleName("gss-uploadNote");\r
 108                 panel.add(info);\r
 109                 final Hidden date = new Hidden("Date", "");\r
 110                 panel.add(date);\r
 111                 final Hidden auth = new Hidden("Authorization", "");\r
 112                 panel.add(auth);\r
 113                 // Add an informative label with the folder name.\r
 114                 Object selection = GSS.get().getFolders().getCurrent().getUserObject();\r
 115                 folder = (FolderResource) selection;\r
 116                 upload.setName("file");\r
 117                 filenameLabel.setText("");\r
 118                 filenameLabel.setVisible(false);\r
 119                 filenameLabel.setStyleName("props-labels");\r
 120                 HorizontalPanel fileUloadPanel = new HorizontalPanel();\r
 121                 fileUloadPanel.add(filenameLabel);\r
 122                 fileUloadPanel.add(upload);\r
 123                 Grid generalTable = new Grid(2, 2);\r
 124                 generalTable.setText(0, 0, "Folder");\r
 125                 generalTable.setText(1, 0, "File");\r
 126                 generalTable.setText(0, 1, folder.getName());\r
 127                 generalTable.setWidget(1, 1, fileUloadPanel);\r
 128                 generalTable.getCellFormatter().setStyleName(0, 0, "props-labels");\r
 129                 generalTable.getCellFormatter().setStyleName(1, 0, "props-labels");\r
 130                 generalTable.getCellFormatter().setStyleName(0, 1, "props-values");\r
 131                 generalTable.getCellFormatter().setStyleName(1, 1, "props-values");\r
 132                 generalTable.setCellSpacing(4);\r
 133 \r
 134                 panel.add(generalTable);\r
 135 \r
 136                 // Create a panel to hold the buttons.\r
 137                 HorizontalPanel buttons = new HorizontalPanel();\r
 138 \r
 139                 // Create the 'upload' button, along with a listener that submits the\r
 140                 // form.\r
 141                 final Button submit = new Button("Upload", new ClickHandler() {\r
 142                         @Override\r
 143                         public void onClick(ClickEvent event) {\r
 144                                 prepareAndSubmit();\r
 145                         }\r
 146                 });\r
 147                 buttons.add(submit);\r
 148                 buttons.setCellHorizontalAlignment(submit, HasHorizontalAlignment.ALIGN_CENTER);\r
 149                 // Create the 'Cancel' button, along with a listener that hides the\r
 150                 // dialog when the button is clicked.\r
 151                 final Button cancel = new Button("Cancel", new ClickHandler() {\r
 152                         @Override\r
 153                         public void onClick(ClickEvent event) {\r
 154                                 repeater.finish();\r
 155                                 hide();\r
 156                         }\r
 157                 });\r
 158                 buttons.add(cancel);\r
 159                 buttons.setCellHorizontalAlignment(cancel, HasHorizontalAlignment.ALIGN_CENTER);\r
 160                 buttons.setSpacing(8);\r
 161                 buttons.addStyleName("gss-DialogBox");\r
 162 \r
 163                 // Add an event handler to the form.\r
 164                 form.addSubmitHandler(new SubmitHandler() {\r
 165 \r
 166                         @Override\r
 167                         public void onSubmit(SubmitEvent event) {\r
 168                                 GSS app = GSS.get();\r
 169                                 // This event is fired just before the form is submitted. We can\r
 170                                 // take this opportunity to perform validation.\r
 171                                 if (upload.getFilename().length() == 0) {\r
 172                                         app.displayError("You must select a file!");\r
 173                                         event.cancel();\r
 174                                         hide();\r
 175                                 } else {\r
 176 \r
 177                                         canContinue();\r
 178                                         GWT.log("Cancel:" + cancelEvent, null);\r
 179                                         if (cancelEvent) {\r
 180                                                 cancelEvent = false;\r
 181                                                 app.displayError("The specified file name already exists in this folder");\r
 182                                                 event.cancel();\r
 183                                                 hide();\r
 184                                         } else {\r
 185 \r
 186                                                 fileNameToUse = getFilename(upload.getFilename());\r
 187                                                 String apath;\r
 188                                                 FileResource selectedFile = getFileForName(fileNameToUse);\r
 189                                                 if (selectedFile == null ) {\r
 190                                                         //we are going to create a file\r
 191                                                         apath = folder.getUri();\r
 192                                                         if (!apath.endsWith("/"))\r
 193                                                                 apath = apath + "/";\r
 194                                                         apath = apath + encodeComponent(fileNameToUse);\r
 195                                                 } else\r
 196                                                         apath = selectedFile.getUri();\r
 197                                                 form.setAction(apath);\r
 198                                                 String dateString = RestCommand.getDate();\r
 199                                                 String resource = apath.substring(app.getApiPath().length() - 1, apath.length());\r
 200                                                 String sig = RestCommand.calculateSig("POST", dateString, resource, RestCommand.base64decode(app.getToken()));\r
 201                                                 date.setValue(dateString);\r
 202                                                 auth.setValue(app.getCurrentUserResource().getUsername() + " " + sig);\r
 203                                                 GWT.log("FolderPATH:" + folder.getUri(), null);\r
 204                                                 submit.setEnabled(false);\r
 205                                                 upload.setVisible(false);\r
 206                                                 filenameLabel.setText(fileNameToUse);\r
 207                                                 filenameLabel.setVisible(true);\r
 208                                                 repeater.start();\r
 209                                                 progressBar.setVisible(true);\r
 210                                         }\r
 211                                 }\r
 212 \r
 213                         }\r
 214                 });\r
 215                 form.addSubmitCompleteHandler(new SubmitCompleteHandler() {\r
 216 \r
 217                         @Override\r
 218                         public void onSubmitComplete(SubmitCompleteEvent event) {\r
 219                                 // When the form submission is successfully completed, this\r
 220                                 // event is fired. Assuming the service returned a response\r
 221                                 // of type text/html, we can get the result text here (see\r
 222                                 // the FormPanel documentation for further explanation).\r
 223                                 String results = event.getResults();\r
 224 \r
 225                                 // Unfortunately the results are never empty, even in\r
 226                                 // the absense of errors, so we have to check for '<pre></pre>'.\r
 227                                 if (!results.equalsIgnoreCase("<pre></pre>")) {\r
 228                                         GWT.log(results, null);\r
 229                                         GSS.get().displayError(results);\r
 230                                 }\r
 231                                 progressBar.setProgress(100);\r
 232                                 cancelUpload();\r
 233                                 GSS.get().showFileList(true);\r
 234                                 GSS.get().getStatusPanel().updateStats();\r
 235 \r
 236                         }\r
 237                 });\r
 238 \r
 239 \r
 240                 panel.add(buttons);\r
 241                 progressBar = new ProgressBar(50, ProgressBar.SHOW_TIME_REMAINING);\r
 242                 panel.add(progressBar);\r
 243                 progressBar.setVisible(false);\r
 244                 panel.setCellHorizontalAlignment(buttons, HasHorizontalAlignment.ALIGN_CENTER);\r
 245                 panel.setCellHorizontalAlignment(progressBar, HasHorizontalAlignment.ALIGN_CENTER);\r
 246                 panel.addStyleName("gss-DialogBox");\r
 247                 addStyleName("gss-DialogBox");\r
 248                 setWidget(form);\r
 249         }\r
 250 \r
 251         @Override\r
 252         protected void onPreviewNativeEvent(NativePreviewEvent preview) {\r
 253                 super.onPreviewNativeEvent(preview);\r
 254 \r
 255                 NativeEvent evt = preview.getNativeEvent();\r
 256                 if (evt.getType().equals("keydown"))\r
 257                         // Use the popup's key preview hooks to close the dialog when either\r
 258                         // enter or escape is pressed.\r
 259                         switch (evt.getKeyCode()) {\r
 260                                 case KeyCodes.KEY_ENTER:\r
 261                                         prepareAndSubmit();\r
 262                                         break;\r
 263                                 case KeyCodes.KEY_ESCAPE:\r
 264                                         cancelUpload();\r
 265                                         break;\r
 266                         }\r
 267         }\r
 268 \r
 269 \r
 270 \r
 271         /**\r
 272          * Cancels the file upload.\r
 273          */\r
 274         private void cancelUpload() {\r
 275                 repeater.finish();\r
 276                 hide();\r
 277         }\r
 278 \r
 279         /**\r
 280          * Make any last minute checks and start the upload.\r
 281          */\r
 282         public void prepareAndSubmit() {\r
 283                 final String fname = getFilename(upload.getFilename());\r
 284                 if (getFileForName(fname) == null) {\r
 285                         //we are going to create a file, so we check to see if there is a trashed file with the same name\r
 286                         FileResource same = null;\r
 287                         for (FileResource fres : folder.getFiles())\r
 288                                 if (fres.isDeleted() && fres.getName().equals(fname))\r
 289                                         same = fres;\r
 290                         if (same == null)\r
 291                                 form.submit();\r
 292                         else {\r
 293                                 final FileResource sameFile = same;\r
 294                                 GWT.log("Same deleted file", null);\r
 295                                 ConfirmationDialog confirm = new ConfirmationDialog("A file with " +\r
 296                                                 "the same name exists in the trash. If you continue,<br/>the trashed " +\r
 297                                                 "file  '" + fname + "' will be renamed automatically for you.", "Continue") {\r
 298 \r
 299                                         @Override\r
 300                                         public void cancel() {\r
 301                                                 FileUploadDialog.this.hide();\r
 302                                         }\r
 303 \r
 304                                         @Override\r
 305                                         public void confirm() {\r
 306                                                 updateTrashedFile(getBackupFilename(fname), sameFile);\r
 307                                         }\r
 308 \r
 309                                 };\r
 310                                 confirm.center();\r
 311                         }\r
 312                 }\r
 313                 else {\r
 314                         // We are going to update an existing file, so show a confirmation dialog.\r
 315                         ConfirmationDialog confirm = new ConfirmationDialog("Are you sure " +\r
 316                                         "you want to update " + fname + "?", "Update") {\r
 317 \r
 318                                 @Override\r
 319                                 public void cancel() {\r
 320                                         FileUploadDialog.this.hide();\r
 321                                 }\r
 322 \r
 323                                 @Override\r
 324                                 public void confirm() {\r
 325                                         form.submit();\r
 326                                 }\r
 327 \r
 328                         };\r
 329                         confirm.center();\r
 330                 }\r
 331         }\r
 332 \r
 333         /**\r
 334          * Returns the file name from a potential full path argument. Apparently IE\r
 335          * insists on sending the full path name of a file when uploading, forcing\r
 336          * us to trim the extra path info. Since this is only observed on Windows we\r
 337          * get to check for a single path separator value.\r
 338          *\r
 339          * @param name the potentially full path name of a file\r
 340          * @return the file name without extra path information\r
 341          */\r
 342         protected String getFilename(String name) {\r
 343                 int pathSepIndex = name.lastIndexOf("\\");\r
 344                 if (pathSepIndex == -1) {\r
 345                         pathSepIndex = name.lastIndexOf("/");\r
 346                         if (pathSepIndex == -1)\r
 347                                 return name;\r
 348                 }\r
 349                 return name.substring(pathSepIndex + 1);\r
 350         }\r
 351 \r
 352         /**\r
 353          * Check whether the file name exists in selected folder.\r
 354          *\r
 355          * @return\r
 356          */\r
 357         private boolean canContinue() {\r
 358                 if (files == null)\r
 359                         return false;\r
 360                 String fileName = getFilename(upload.getFilename());\r
 361                 if (getFileForName(fileName) == null) {\r
 362                         // For file creation, check to see if the file already exists.\r
 363                         GWT.log("filename to upload:" + fileName, null);\r
 364                         for (FileResource dto : files) {\r
 365                                 GWT.log("Check:" + dto.getName() + "/" + fileName, null);\r
 366                                 if (!dto.isDeleted() && dto.getName().equals(fileName)) {\r
 367                                         cancelEvent = true;\r
 368                                         return true;\r
 369                                 }\r
 370                         }\r
 371                 }\r
 372                 return true;\r
 373         }\r
 374 \r
 375         class RepeatingTimer extends Timer {\r
 376 \r
 377                 private Updateable updateable;\r
 378 \r
 379                 private int interval = 1500;\r
 380 \r
 381                 private boolean running = true;\r
 382 \r
 383                 RepeatingTimer(Updateable _updateable, int _interval) {\r
 384                         updateable = _updateable;\r
 385                         interval = _interval;\r
 386                 }\r
 387 \r
 388                 @Override\r
 389                 public void run() {\r
 390                         updateable.update();\r
 391                 }\r
 392 \r
 393                 public void start() {\r
 394                         running = true;\r
 395 \r
 396                         scheduleRepeating(interval);\r
 397                 }\r
 398 \r
 399                 public void finish() {\r
 400                         running = false;\r
 401                         cancel();\r
 402                 }\r
 403 \r
 404                 public int getInterval() {\r
 405                         return interval;\r
 406                 }\r
 407 \r
 408                 public void setInterval(int anInterval) {\r
 409                         if (interval != anInterval) {\r
 410                                 interval = anInterval;\r
 411                                 if (running) {\r
 412                                         finish();\r
 413                                         start();\r
 414                                 }\r
 415                         }\r
 416                 }\r
 417         }\r
 418 \r
 419         /* (non-Javadoc)\r
 420          * @see gr.ebs.gss.client.Updateable#update()\r
 421          */\r
 422         public void update() {\r
 423                 String apath = folder.getUri();\r
 424                 if (!apath.endsWith("/"))\r
 425                         apath = apath + "/";\r
 426                 apath = apath + encodeComponent(fileNameToUse) + "?progress=" + encodeComponent(fileNameToUse);\r
 427                 GetCommand eg = new GetCommand<UploadStatusResource>(UploadStatusResource.class, apath, false, null) {\r
 428 \r
 429                         @Override\r
 430                         public void onComplete() {\r
 431                                 UploadStatusResource res = getResult();\r
 432                                 progressBar.setProgress(res.percent());\r
 433                         }\r
 434 \r
 435                         @Override\r
 436                         public void onError(Throwable t) {\r
 437                                 GWT.log("", t);\r
 438                         }\r
 439 \r
 440                 };\r
 441                 DeferredCommand.addCommand(eg);\r
 442         }\r
 443 \r
 444         protected String getBackupFilename(String filename) {\r
 445                 List<FileResource> filesInSameFolder = new ArrayList<FileResource>();\r
 446                 for (FileResource deleted : folder.getFiles())\r
 447                         if (deleted.isDeleted())\r
 448                                 filesInSameFolder.add(deleted);\r
 449                 int i = 1;\r
 450                 for (FileResource same : filesInSameFolder)\r
 451                         if (same.getName().startsWith(filename)) {\r
 452                                 String toCheck = same.getName().substring(filename.length(), same.getName().length());\r
 453                                 if (toCheck.startsWith(" ")) {\r
 454                                         int test = -1;\r
 455                                         try {\r
 456                                                 test = Integer.valueOf(toCheck.replace(" ", ""));\r
 457                                         } catch (NumberFormatException e) {\r
 458                                                 // Do nothing since string is not a number.\r
 459                                         }\r
 460                                         if (test >= i)\r
 461                                                 i = test + 1;\r
 462                                 }\r
 463                         }\r
 464 \r
 465                 return filename + " " + i;\r
 466         }\r
 467 \r
 468         /**\r
 469          * Rename the conflicting trashed file with the supplied new name.\r
 470          */\r
 471         private void updateTrashedFile(String newName, FileResource trashedFile) {\r
 472                 JSONObject json = new JSONObject();\r
 473                 json.put("name", new JSONString(newName));\r
 474                 PostCommand cf = new PostCommand(trashedFile.getUri() + "?update=", json.toString(), 200) {\r
 475 \r
 476                         @Override\r
 477                         public void onComplete() {\r
 478                                 form.submit();\r
 479                         }\r
 480 \r
 481                         @Override\r
 482                         public void onError(Throwable t) {\r
 483                                 GSS app = GSS.get();\r
 484                                 GWT.log("", t);\r
 485                                 if (t instanceof RestException) {\r
 486                                         int statusCode = ((RestException) t).getHttpStatusCode();\r
 487                                         if (statusCode == 405)\r
 488                                                 app.displayError("You don't have the necessary permissions");\r
 489                                         else if (statusCode == 404)\r
 490                                                 app.displayError("User in permissions does not exist");\r
 491                                         else if (statusCode == 409)\r
 492                                                 app.displayError("A file with the same name already exists");\r
 493                                         else if (statusCode == 413)\r
 494                                                 app.displayError("Your quota has been exceeded");\r
 495                                         else\r
 496                                                 app.displayError("Unable to modify file:" + ((RestException) t).getHttpStatusText());\r
 497                                 } else\r
 498                                         app.displayError("System error modifying file:" + t.getMessage());\r
 499                         }\r
 500 \r
 501                 };\r
 502                 DeferredCommand.addCommand(cf);\r
 503         }\r
 504 \r
 505         protected FileResource getFileForName(String name){\r
 506                 for (FileResource f : folder.getFiles())\r
 507                         if (!f.isDeleted() && f.getName().equals(name))\r
 508                                 return f;\r
 509                 return null;\r
 510         }\r
 511 \r
 512 \r
 513         /**\r
 514          * Same as URL.encodeComponent, but also\r
 515          * encode apostrophe since browsers aren't consistent about it\r
 516          * (FF encodes, IE does not).\r
 517          */\r
 518         private String encodeComponent(String decodedURLComponent) {\r
 519                 String retv = URL.encodeComponent(decodedURLComponent);\r
 520                 retv = retv.replaceAll("'", "%27");\r
 521                 return retv;\r
 522         }\r
 523 \r
 524         /**\r
 525          * Modify the files.\r
 526          *\r
 527          * @param newFiles the files to set\r
 528          */\r
 529         public void setFiles(List<FileResource> newFiles) {\r
 530                 files = newFiles;\r
 531         }\r
 532 }\r