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