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