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