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

   1 /*\r
   2  * Copyright 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.PostCommand;\r
  22 import gr.ebs.gss.client.rest.RestCommand;\r
  23 import gr.ebs.gss.client.rest.RestException;\r
  24 import gr.ebs.gss.client.rest.resource.FileResource;\r
  25 import gr.ebs.gss.client.rest.resource.FolderResource;\r
  26 \r
  27 import java.util.ArrayList;\r
  28 import java.util.Arrays;\r
  29 import java.util.HashMap;\r
  30 import java.util.List;\r
  31 import java.util.Map;\r
  32 \r
  33 import com.google.gwt.core.client.GWT;\r
  34 import com.google.gwt.gears.client.Factory;\r
  35 import com.google.gwt.gears.client.desktop.Desktop;\r
  36 import com.google.gwt.gears.client.desktop.File;\r
  37 import com.google.gwt.gears.client.desktop.OpenFilesHandler;\r
  38 import com.google.gwt.gears.client.httprequest.HttpRequest;\r
  39 import com.google.gwt.gears.client.httprequest.ProgressEvent;\r
  40 import com.google.gwt.gears.client.httprequest.ProgressHandler;\r
  41 import com.google.gwt.gears.client.httprequest.RequestCallback;\r
  42 import com.google.gwt.json.client.JSONObject;\r
  43 import com.google.gwt.json.client.JSONString;\r
  44 import com.google.gwt.user.client.Command;\r
  45 import com.google.gwt.user.client.DeferredCommand;\r
  46 import com.google.gwt.user.client.ui.Button;\r
  47 import com.google.gwt.user.client.ui.ClickListener;\r
  48 import com.google.gwt.user.client.ui.FlexTable;\r
  49 import com.google.gwt.user.client.ui.HTML;\r
  50 import com.google.gwt.user.client.ui.HasHorizontalAlignment;\r
  51 import com.google.gwt.user.client.ui.HorizontalPanel;\r
  52 import com.google.gwt.user.client.ui.VerticalPanel;\r
  53 import com.google.gwt.user.client.ui.Widget;\r
  54 \r
  55 /**\r
  56  * The 'File upload' dialog box implementation with Google Gears support.\r
  57  */\r
  58 public class FileUploadGearsDialog extends FileUploadDialog implements Updateable {\r
  59 \r
  60         private final Factory factory = Factory.getInstance();\r
  61 \r
  62         /**\r
  63          * The array of files to upload.\r
  64          */\r
  65         private File[] fileObjects;\r
  66 \r
  67         /**\r
  68          * A list of files to upload, created from files array. Used to signal\r
  69          * finished state when empty.\r
  70          */\r
  71         private List<File> selectedFiles = new ArrayList<File>();\r
  72 \r
  73         /**\r
  74          * The list of progress bars for individual files.\r
  75          */\r
  76         private List<ProgressBar> progressBars = new ArrayList<ProgressBar>();\r
  77 \r
  78         private Button browse;\r
  79 \r
  80         private Button submit;\r
  81 \r
  82         private FlexTable generalTable;\r
  83 \r
  84         private Map<String, FileResource> toRename;\r
  85 \r
  86         /**\r
  87          * The widget's constructor.\r
  88          */\r
  89         public FileUploadGearsDialog() {\r
  90                 // Set the dialog's caption.\r
  91                 setText("File upload");\r
  92                 setAnimationEnabled(true);\r
  93                 // Create a panel to hold all of the dialog widgets.\r
  94                 VerticalPanel panel = new VerticalPanel();\r
  95                 final HTML info = new HTML("You may select one or more files to upload.");\r
  96                 info.addStyleName("gss-uploadNote");\r
  97                 panel.add(info);\r
  98                 // Add an informative label with the folder name.\r
  99                 Object selection = GSS.get().getFolders().getCurrent().getUserObject();\r
 100                 folder = (FolderResource) selection;\r
 101 \r
 102                 browse = new Button("Browse...");\r
 103 \r
 104                 HorizontalPanel fileUploadPanel = new HorizontalPanel();\r
 105                 fileUploadPanel.add(browse);\r
 106 \r
 107                 generalTable = new FlexTable();\r
 108                 generalTable.setText(0, 0, "Folder");\r
 109                 generalTable.setText(1, 0, "File");\r
 110                 generalTable.setText(0, 1, folder.getName());\r
 111                 generalTable.setWidget(1, 1, fileUploadPanel);\r
 112                 generalTable.getCellFormatter().setStyleName(0, 0, "props-labels");\r
 113                 generalTable.getCellFormatter().setStyleName(1, 0, "props-labels");\r
 114                 generalTable.getCellFormatter().setStyleName(0, 1, "props-values");\r
 115                 generalTable.getCellFormatter().setStyleName(1, 1, "props-values");\r
 116                 generalTable.setCellSpacing(4);\r
 117 \r
 118                 panel.add(generalTable);\r
 119 \r
 120                 // Create a panel to hold the buttons.\r
 121                 HorizontalPanel buttons = new HorizontalPanel();\r
 122 \r
 123                 submit = new Button("Upload");\r
 124                 submit.addClickListener(new ClickListener() {\r
 125 \r
 126                         public void onClick(Widget sender) {\r
 127                                 prepareAndSubmit();\r
 128                         }\r
 129                 });\r
 130                 submit.setEnabled(false);\r
 131                 buttons.add(submit);\r
 132                 buttons.setCellHorizontalAlignment(submit, HasHorizontalAlignment.ALIGN_CENTER);\r
 133                 // Create the 'Cancel' button, along with a listener that hides the\r
 134                 // dialog when the button is clicked.\r
 135                 Button cancel = new Button("Cancel", new ClickListener() {\r
 136 \r
 137                         public void onClick(Widget sender) {\r
 138                                 hide();\r
 139                         }\r
 140                 });\r
 141                 buttons.add(cancel);\r
 142                 buttons.setCellHorizontalAlignment(cancel, HasHorizontalAlignment.ALIGN_CENTER);\r
 143                 buttons.setSpacing(8);\r
 144                 buttons.addStyleName("gss-DialogBox");\r
 145 \r
 146                 browse.addClickListener(new ClickListener() {\r
 147                         public void onClick(Widget sender) {\r
 148                                 Desktop desktop = factory.createDesktop();\r
 149                                 desktop.openFiles(new OpenFilesHandler() {\r
 150 \r
 151                                         public void onOpenFiles(OpenFilesEvent event) {\r
 152                                                 fileObjects = event.getFiles();\r
 153                                                 selectedFiles.addAll(Arrays.asList(fileObjects));\r
 154                                                 for (int i = 0; i< selectedFiles.size(); i++) {\r
 155                                                         generalTable.setText(i+1, 0, "File");\r
 156                                                         generalTable.setText(i+1, 1, selectedFiles.get(i).getName());\r
 157                                                         ProgressBar progress = new ProgressBar(20, 0);\r
 158                                                         generalTable.setWidget(i+1, 2, progress);\r
 159                                                         progressBars.add(progress);\r
 160                                                         generalTable.getCellFormatter().setStyleName(i+1, 0, "props-labels");\r
 161                                                         generalTable.getCellFormatter().setStyleName(i+1, 1, "props-values");\r
 162                                                 }\r
 163                                                 submit.setEnabled(true);\r
 164                                         }\r
 165                                 });\r
 166                         }\r
 167                 });\r
 168 \r
 169                 panel.add(buttons);\r
 170                 panel.setCellHorizontalAlignment(buttons, HasHorizontalAlignment.ALIGN_CENTER);\r
 171                 panel.addStyleName("gss-DialogBox");\r
 172                 addStyleName("gss-DialogBox");\r
 173                 setWidget(panel);\r
 174         }\r
 175 \r
 176         /**\r
 177          * Check whether the specified file name exists in the selected folder.\r
 178          */\r
 179         private boolean canContinue(File file) {\r
 180                 String fileName = getFilename(file.getName());\r
 181                 if (getFileForName(fileName) == null)\r
 182                         // For file creation, check to see if the file already exists.\r
 183                         for (FileResource fileRes : files)\r
 184                                 if (!fileRes.isDeleted() && fileRes.getName().equals(fileName))\r
 185                                         return false;\r
 186                 return true;\r
 187         }\r
 188 \r
 189         @Override\r
 190         public void prepareAndSubmit() {\r
 191                 GSS app = GSS.get();\r
 192                 if (selectedFiles.size() == 0) {\r
 193                         app.displayError("You must select a file!");\r
 194                         hide();\r
 195                         return;\r
 196                 }\r
 197                 for (File file: selectedFiles)\r
 198                         if (!canContinue(file)) {\r
 199                                 app.displayError("The file name " + file.getName() +\r
 200                                                         " already exists in this folder");\r
 201                                 hide();\r
 202                                 return;\r
 203                         }\r
 204                 submit.setEnabled(false);\r
 205                 browse.setVisible(false);\r
 206                 List<String> toUpdate = new ArrayList<String>();\r
 207                 toRename = new HashMap<String, FileResource>();\r
 208                 for (File file: selectedFiles) {\r
 209                         String fname = getFilename(file.getName());\r
 210                         if (getFileForName(fname) == null) {\r
 211                                 // We are going to create a file, so we check to see if there is a\r
 212                                 // trashed file with the same name.\r
 213                                 FileResource same = null;\r
 214                                 for (FileResource fres : folder.getFiles())\r
 215                                         if (fres.isDeleted() && fres.getName().equals(fname))\r
 216                                                 same = fres;\r
 217                                 // In that case add it to the list of files to rename.\r
 218                                 if (same != null)\r
 219                                         toRename.put(getBackupFilename(fname), same);\r
 220                         } else\r
 221                                 // If we are updating a file add it to the list of files to update.\r
 222                                 toUpdate.add(fname);\r
 223                 }\r
 224 \r
 225                 if (!toUpdate.isEmpty()) {\r
 226                         StringBuffer sb = new StringBuffer();\r
 227                         for (String name: toUpdate)\r
 228                                 sb.append(name).append("<br/>");\r
 229                         // We are going to update existing files, so show a confirmation dialog.\r
 230                         ConfirmationDialog confirm = new ConfirmationDialog("Are you sure " +\r
 231                                         "you want to update the following files?<br/><i>" + sb +\r
 232                                         "</i>", "Update") {\r
 233 \r
 234                                 @Override\r
 235                                 public void cancel() {\r
 236                                         hide();\r
 237                                 }\r
 238 \r
 239                                 @Override\r
 240                                 public void confirm() {\r
 241                                         confirmRename();\r
 242                                 }\r
 243 \r
 244                         };\r
 245                         confirm.center();\r
 246                 } else\r
 247                         confirmRename();\r
 248         }\r
 249 \r
 250         /**\r
 251          * Confirm the renames of synonymous files already in the trash.\r
 252          */\r
 253         private void confirmRename() {\r
 254                 if (!toRename.isEmpty()) {\r
 255                         StringBuffer sb = new StringBuffer();\r
 256                         for (FileResource file: toRename.values())\r
 257                                 sb.append(file.getName()).append("<br/>");\r
 258                         ConfirmationDialog confirm = new ConfirmationDialog("Files " +\r
 259                                         "with the following names already exist in the trash. If" +\r
 260                                         " you continue,<br/>the trashed files will be renamed " +\r
 261                                         "automatically for you:<br/><i>" + sb + "</i>", "Continue") {\r
 262 \r
 263                                 @Override\r
 264                                 public void cancel() {\r
 265                                         hide();\r
 266                                 }\r
 267 \r
 268                                 @Override\r
 269                                 public void confirm() {\r
 270                                         updateTrashedFiles();\r
 271                                 }\r
 272 \r
 273                         };\r
 274                         confirm.center();\r
 275                 } else\r
 276                         uploadFiles();\r
 277         }\r
 278 \r
 279         /**\r
 280          * Rename the conflicting trashed files with the supplied new names.\r
 281          */\r
 282         private void updateTrashedFiles() {\r
 283                 for (final String name: toRename.keySet()) {\r
 284                         JSONObject json = new JSONObject();\r
 285                         json.put("name", new JSONString(name));\r
 286                         PostCommand cf = new PostCommand(toRename.get(name).getUri() + "?update=", json.toString(), 200) {\r
 287 \r
 288                                 @Override\r
 289                                 public void onComplete() {\r
 290                                         toRename.remove(name);\r
 291                                         uploadFiles();\r
 292                                 }\r
 293 \r
 294                                 @Override\r
 295                                 public void onError(Throwable t) {\r
 296                                         GSS app = GSS.get();\r
 297                                         GWT.log("", t);\r
 298                                         if (t instanceof RestException) {\r
 299                                                 int statusCode = ((RestException) t).getHttpStatusCode();\r
 300                                                 if (statusCode == 405)\r
 301                                                         app.displayError("You don't have the necessary permissions");\r
 302                                                 else if (statusCode == 404)\r
 303                                                         app.displayError("User in permissions does not exist");\r
 304                                                 else if (statusCode == 409)\r
 305                                                         app.displayError("A file with the same name already exists");\r
 306                                                 else if (statusCode == 413)\r
 307                                                         app.displayError("Your quota has been exceeded");\r
 308                                                 else\r
 309                                                         app.displayError("Unable to modify file:" + ((RestException) t).getHttpStatusText());\r
 310                                         } else\r
 311                                                 app.displayError("System error modifying file:" + t.getMessage());\r
 312                                 }\r
 313 \r
 314                         };\r
 315                         DeferredCommand.addCommand(cf);\r
 316                 }\r
 317         }\r
 318 \r
 319         /**\r
 320          * Checks if the renaming step for already trashed files is complete and\r
 321          * starts file uploads.\r
 322          */\r
 323         private void uploadFiles() {\r
 324                 if (!toRename.isEmpty()) return;\r
 325                 for (int i = 0; i< fileObjects.length; i++) {\r
 326                         final int index = i;\r
 327                         DeferredCommand.addCommand(new Command() {\r
 328                                 public void execute() {\r
 329                                         doPut(fileObjects[index], index);\r
 330                                 }\r
 331                         });\r
 332                 }\r
 333         }\r
 334 \r
 335         /**\r
 336          * Perform the HTTP PUT requests to upload the specified file.\r
 337          */\r
 338         protected void doPut(final File file, final int index) {\r
 339                 final GSS app = GSS.get();\r
 340                 HttpRequest request = factory.createHttpRequest();\r
 341                 String method = "PUT";\r
 342 \r
 343                 String path;\r
 344                 final String filename = getFilename(file.getName());\r
 345                 FileResource selectedResource = getFileForName(filename);\r
 346                 if (selectedResource == null ) {\r
 347                         // We are going to create a file.\r
 348                         path = folder.getUri();\r
 349                         if (!path.endsWith("/"))\r
 350                                 path = path + "/";\r
 351                         path = path + encodeComponent(filename);\r
 352                 } else\r
 353                         path = selectedResource.getUri();\r
 354 \r
 355                 String token = app.getToken();\r
 356                 String resource = path.substring(app.getApiPath().length()-1, path.length());\r
 357                 String date = RestCommand.getDate();\r
 358                 String sig = RestCommand.calculateSig(method, date, resource, RestCommand.base64decode(token));\r
 359                 request.open(method, path);\r
 360                 request.setRequestHeader("X-GSS-Date", date);\r
 361                 request.setRequestHeader("Authorization", app.getCurrentUserResource().getUsername() + " " + sig);\r
 362                 request.setRequestHeader("Accept", "application/json; charset=utf-8");\r
 363                 request.setCallback(new RequestCallback() {\r
 364                         public void onResponseReceived(HttpRequest req) {\r
 365                                 switch(req.getStatus()) {\r
 366                                         case 201: // Created falls through to updated.\r
 367                                         case 204:\r
 368                                                 selectedFiles.remove(file);\r
 369                                                 finish();\r
 370                                                 break;\r
 371                                         case 403:\r
 372                                                 SessionExpiredDialog dlg = new SessionExpiredDialog();\r
 373                                                 dlg.center();\r
 374                                                 break;\r
 375                                         case 405:\r
 376                                                 app.displayError("You don't have permission to " +\r
 377                                                                 "upload file " + filename);\r
 378                                                 break;\r
 379                                         case 409:\r
 380                                                 app.displayError("A folder with the name " + filename +\r
 381                                                                 " already exists at this level");\r
 382                                                 break;\r
 383                                         case 413:\r
 384                                                 app.displayError("There is not enough free space " +\r
 385                                                                 "available for uploading " + filename);\r
 386                                                 break;\r
 387                                         default:\r
 388                                                 app.displayError("Error uploading file " + filename +\r
 389                                                                         ": " + req.getStatus());\r
 390                                                 DisplayHelper.log(req.getStatus() + ":" + req.getStatusText());\r
 391                                 }\r
 392                         }\r
 393                 });\r
 394                 request.getUpload().setProgressHandler(new ProgressHandler() {\r
 395                         public void onProgress(ProgressEvent event) {\r
 396                                 double pcnt = (double) event.getLoaded() / event.getTotal();\r
 397                                 progressBars.get(index).setProgress((int) Math.floor(pcnt * 100));\r
 398                         }\r
 399                 });\r
 400                 request.send(file.getBlob());\r
 401         }\r
 402 \r
 403         /**\r
 404          * Perform the final actions after the files are uploaded.\r
 405          */\r
 406         private void finish() {\r
 407                 if (!selectedFiles.isEmpty()) return;\r
 408                 hide();\r
 409                 GSS.get().showFileList(true);\r
 410                 GSS.get().getStatusPanel().updateStats();\r
 411         }\r
 412 }\r