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