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