code.grnet.gr Git - pithos-web-client/blob - src/gr/grnet/pithos/web/client/othersharedtree/OtherSharedTreeViewModel.java

   1 /*
   2  * Copyright 2011-2012 GRNET S.A. All rights reserved.
   3  *
   4  * Redistribution and use in source and binary forms, with or
   5  * without modification, are permitted provided that the following
   6  * conditions are met:
   7  *
   8  *   1. Redistributions of source code must retain the above
   9  *      copyright notice, this list of conditions and the following
  10  *      disclaimer.
  11  *
  12  *   2. Redistributions in binary form must reproduce the above
  13  *      copyright notice, this list of conditions and the following
  14  *      disclaimer in the documentation and/or other materials
  15  *      provided with the distribution.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY GRNET S.A. ``AS IS'' AND ANY EXPRESS
  18  * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  19  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  20  * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL GRNET S.A OR
  21  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  22  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  23  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
  24  * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
  25  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  26  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
  27  * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  28  * POSSIBILITY OF SUCH DAMAGE.
  29  *
  30  * The views and conclusions contained in the software and
  31  * documentation are those of the authors and should not be
  32  * interpreted as representing official policies, either expressed
  33  * or implied, of GRNET S.A.
  34  */
  35
  36 package gr.grnet.pithos.web.client.othersharedtree;
  37
  38 import gr.grnet.pithos.web.client.FolderContextMenu;
  39 import gr.grnet.pithos.web.client.Pithos;
  40 import gr.grnet.pithos.web.client.SharingUsers;
  41 import gr.grnet.pithos.web.client.foldertree.AccountResource;
  42 import gr.grnet.pithos.web.client.foldertree.File;
  43 import gr.grnet.pithos.web.client.foldertree.Folder;
  44 import gr.grnet.pithos.web.client.mysharedtree.MysharedTreeView;
  45 import gr.grnet.pithos.web.client.othersharedtree.OtherSharedTreeView.Templates;
  46 import gr.grnet.pithos.web.client.rest.GetRequest;
  47 import gr.grnet.pithos.web.client.rest.RestException;
  48
  49 import java.util.HashMap;
  50 import java.util.HashSet;
  51 import java.util.Iterator;
  52 import java.util.Map;
  53 import java.util.Set;
  54
  55 import com.google.gwt.cell.client.AbstractCell;
  56 import com.google.gwt.cell.client.Cell;
  57 import com.google.gwt.cell.client.TextCell;
  58 import com.google.gwt.cell.client.ValueUpdater;
  59 import com.google.gwt.core.client.GWT;
  60 import com.google.gwt.core.client.Scheduler;
  61 import com.google.gwt.event.dom.client.ContextMenuEvent;
  62 import com.google.gwt.http.client.Response;
  63 import com.google.gwt.http.client.URL;
  64 import com.google.gwt.safehtml.shared.SafeHtml;
  65 import com.google.gwt.safehtml.shared.SafeHtmlBuilder;
  66 import com.google.gwt.text.shared.SafeHtmlRenderer;
  67 import com.google.gwt.user.client.Command;
  68 import com.google.gwt.user.client.ui.AbstractImagePrototype;
  69 import com.google.gwt.view.client.ListDataProvider;
  70 import com.google.gwt.view.client.SelectionChangeEvent;
  71 import com.google.gwt.view.client.SelectionChangeEvent.Handler;
  72 import com.google.gwt.view.client.SingleSelectionModel;
  73 import com.google.gwt.view.client.TreeViewModel;
  74
  75 public class OtherSharedTreeViewModel implements TreeViewModel {
  76
  77     protected Pithos app;
  78
  79     String dummy = "No shares by others yet";
  80
  81     private Cell<Folder> folderCell = new AbstractCell<Folder>(ContextMenuEvent.getType().getName()) {
  82
  83        @Override
  84         public void render(Context context, Folder folder, SafeHtmlBuilder safeHtmlBuilder) {
  85             String html = AbstractImagePrototype.create(OtherSharedTreeView.images.folderYellow()).getHTML();
  86                 safeHtmlBuilder.appendHtmlConstant(html).appendHtmlConstant("&nbsp;");
  87             safeHtmlBuilder.append(Templates.INSTANCE.nameSpan(folder.getName()));
  88         }
  89
  90         @Override
  91         public void onBrowserEvent(Context context, com.google.gwt.dom.client.Element parent, final Folder folder, com.google.gwt.dom.client.NativeEvent event, ValueUpdater<Folder> valueUpdater) {
  92             if (event.getType().equals(ContextMenuEvent.getType().getName())) {
  93                 final int x = event.getClientX();
  94                 final int y = event.getClientY();
  95                 OtherSharedTreeViewModel.this.selectionModel.setSelected(folder, true);
  96                 app.scheduleFolderHeadCommand(folder, new Command() {
  97
  98                                         @Override
  99                                         public void execute() {
 100                                 FolderContextMenu menu = new FolderContextMenu(app, OtherSharedTreeView.images, app.getSelectedTree(), folder);
 101                                 menu.setPopupPosition(x, y);
 102                                 menu.show();
 103                                         }
 104                                 });
 105             }
 106         }
 107     };
 108
 109     private ListDataProvider<String> rootDataProvider = new ListDataProvider<String>();
 110     protected ListDataProvider<String> userLevelDataProvider = new ListDataProvider<String>();
 111
 112     protected Map<String, ListDataProvider<Folder>> userDataProviderMap = new HashMap<String, ListDataProvider<Folder>>();
 113     private Map<Folder, ListDataProvider<Folder>> dataProviderMap = new HashMap<Folder, ListDataProvider<Folder>>();
 114
 115     protected SingleSelectionModel<Folder> selectionModel;
 116
 117     public OtherSharedTreeViewModel(Pithos _app, SingleSelectionModel<Folder> selectionModel) {
 118         app = _app;
 119         this.selectionModel = selectionModel;
 120     }
 121
 122     @Override
 123     public <T> NodeInfo<?> getNodeInfo(T value) {
 124         if (value == null) {
 125                 fetchSharingUsers(null);
 126             return new DefaultNodeInfo<String>(userLevelDataProvider, new TextCell(new SafeHtmlRenderer<String>() {
 127
 128                                 @Override
 129                                 public SafeHtml render(String object) {
 130                     SafeHtmlBuilder builder = new SafeHtmlBuilder();
 131                     render(object, builder);
 132                     return builder.toSafeHtml();
 133                                 }
 134
 135                                 @Override
 136                                 public void render(String object, SafeHtmlBuilder builder) {
 137                     if (!object.equals(dummy)) {
 138                         String html = AbstractImagePrototype.create(OtherSharedTreeView.images.myShared()).getHTML();
 139                         builder.appendHtmlConstant(html).appendHtmlConstant("&nbsp;");
 140                     }
 141                     builder.append(OtherSharedTreeView.Templates.INSTANCE.nameSpan(object));
 142                                 }
 143                         }), null, null);
 144         }
 145         else if (value instanceof String) {
 146                         String username = (String) value;
 147                         if (userDataProviderMap.get(username) == null) {
 148                                 userDataProviderMap.put(username, new ListDataProvider<Folder>());
 149                         }
 150                         final ListDataProvider<Folder> dataProvider = userDataProviderMap.get(username);
 151                         fetchSharedContainers(username, dataProvider, null);
 152                         return new DefaultNodeInfo<Folder>(dataProvider, folderCell, selectionModel, null);
 153         }
 154         else {
 155             final Folder f = (Folder) value;
 156             if (dataProviderMap.get(f) == null) {
 157                 dataProviderMap.put(f, new ListDataProvider<Folder>());
 158             }
 159             final ListDataProvider<Folder> dataProvider = dataProviderMap.get(f);
 160             fetchFolder(f, dataProvider, false);
 161             return new DefaultNodeInfo<Folder>(dataProvider, folderCell, selectionModel, null);
 162         }
 163     }
 164
 165     private void fetchSharingUsers(final Command callback) {
 166         GetRequest<SharingUsers> getSharingUsers = new GetRequest<SharingUsers>(SharingUsers.class, app.getApiPath(), "", "?format=json") {
 167             @Override
 168             public void onSuccess(final SharingUsers _result) {
 169                 userLevelDataProvider.getList().clear();
 170                 userLevelDataProvider.getList().addAll(_result.getUsers());
 171                 if (userLevelDataProvider.getList().isEmpty())
 172                         userLevelDataProvider.getList().add(dummy);
 173                 Iterator<String> iter = _result.getUsers().iterator();
 174                 fetchSharedContainers(iter, callback);
 175             }
 176
 177             @Override
 178             public void onError(Throwable t) {
 179                 GWT.log("Error getting folder", t);
 180                                 app.setError(t);
 181                 if (t instanceof RestException)
 182                     app.displayError("Error getting folder: " + ((RestException) t).getHttpStatusText());
 183                 else
 184                     app.displayError("System error fetching folder: " + t.getMessage());
 185             }
 186
 187                         @Override
 188                         protected void onUnauthorized(Response response) {
 189                                 app.sessionExpired();
 190                         }
 191         };
 192         getSharingUsers.setHeader("X-Auth-Token", app.getToken());
 193         Scheduler.get().scheduleDeferred(getSharingUsers);
 194         }
 195
 196         protected void fetchSharedContainers(final Iterator<String> iter, final Command callback) {
 197                 if (iter.hasNext()) {
 198                         String username = iter.next();
 199                         if (userDataProviderMap.get(username) == null) {
 200                                 userDataProviderMap.put(username, new ListDataProvider<Folder>());
 201                         }
 202                         final ListDataProvider<Folder> dataProvider = userDataProviderMap.get(username);
 203                         fetchSharedContainers(username, dataProvider, new Command() {
 204
 205                                 @Override
 206                                 public void execute() {
 207                                         fetchSharedContainers(iter, callback);
 208
 209                                 }
 210                         });
 211                 }
 212                 else
 213                         if (callback != null)
 214                                 callback.execute();
 215         }
 216
 217         @Override
 218     public boolean isLeaf(Object o) {
 219                 if (o == null)
 220                         return userLevelDataProvider.getList().isEmpty();
 221                 else if (o instanceof Folder) {
 222             Folder f = (Folder) o;
 223             return f.getSubfolders().isEmpty();
 224         }
 225                 else {
 226                         ListDataProvider<Folder> dp = userDataProviderMap.get(o);
 227                         if (dp != null)
 228                                 return dp.getList().isEmpty();
 229                         return true;
 230                 }
 231     }
 232
 233         private void fetchSharedContainers(final String username, final ListDataProvider<Folder> dataProvider, final Command callback) {
 234                 GetRequest<AccountResource> getUserSharedContainers = new GetRequest<AccountResource>(AccountResource.class, app.getApiPath(), username, "?format=json") {
 235
 236                         @Override
 237                         public void onSuccess(AccountResource _result) {
 238                         final ListDataProvider<Folder> tempProvider = new ListDataProvider<Folder>();
 239                                 Iterator<Folder> iter = _result.getContainers().iterator();
 240                                 fetchFolder(username, iter, tempProvider, new Command() {
 241
 242                                         @Override
 243                                         public void execute() {
 244                                                 dataProvider.getList().clear();
 245                                                 dataProvider.getList().addAll(tempProvider.getList());
 246                                                 if (callback != null)
 247                                                         callback.execute();
 248                                         }
 249                                 });
 250                         }
 251
 252                         @Override
 253                         public void onError(Throwable t) {
 254                 GWT.log("Error getting account", t);
 255                                 app.setError(t);
 256                 if (t instanceof RestException)
 257                     app.displayError("Error getting account: " + ((RestException) t).getHttpStatusText());
 258                 else
 259                     app.displayError("System error fetching user data: " + t.getMessage());
 260                         }
 261
 262                         @Override
 263                         protected void onUnauthorized(Response response) {
 264                                 app.sessionExpired();
 265                         }
 266                 };
 267                 getUserSharedContainers.setHeader("X-Auth-Token", app.getToken());
 268                 Scheduler.get().scheduleDeferred(getUserSharedContainers);
 269         }
 270
 271         protected void fetchFolder(final String username, final Iterator<Folder> iter, final ListDataProvider<Folder> dataProvider, final Command callback) {
 272         if (iter.hasNext()) {
 273             final Folder f = iter.next();
 274
 275             String path = "/" + f.getContainer() + "?format=json&delimiter=/&prefix=" + URL.encodeQueryString(f.getPrefix());
 276             GetRequest<Folder> getFolder = new GetRequest<Folder>(Folder.class, app.getApiPath(), username, path, f) {
 277                 @Override
 278                 public void onSuccess(Folder _result) {
 279                         dataProvider.getList().add(_result);
 280                     fetchFolder(username, iter, dataProvider, callback);
 281                 }
 282
 283                 @Override
 284                 public void onError(Throwable t) {
 285                     GWT.log("Error getting folder", t);
 286                                         app.setError(t);
 287                     if (t instanceof RestException)
 288                         app.displayError("Error getting folder: " + ((RestException) t).getHttpStatusText());
 289                     else
 290                         app.displayError("System error fetching folder: " + t.getMessage());
 291                 }
 292
 293                                 @Override
 294                                 protected void onUnauthorized(Response response) {
 295                                         app.sessionExpired();
 296                                 }
 297             };
 298             getFolder.setHeader("X-Auth-Token", app.getToken());
 299             Scheduler.get().scheduleDeferred(getFolder);
 300         }
 301         else if (callback != null)
 302             callback.execute();
 303     }
 304
 305     public Folder getSelection() {
 306         return selectionModel.getSelectedObject();
 307     }
 308
 309     public void updateFolder(Folder folder, boolean showfiles) {
 310         if (dataProviderMap.get(folder) == null) {
 311             dataProviderMap.put(folder, new ListDataProvider<Folder>());
 312         }
 313         final ListDataProvider<Folder> dataProvider = dataProviderMap.get(folder);
 314         fetchFolder(folder, dataProvider, showfiles);
 315     }
 316
 317     public void fetchFolder(final Folder f, final ListDataProvider<Folder> dataProvider, final boolean showfiles) {
 318         String path = "/" + f.getContainer() + "?format=json&delimiter=/&prefix=" + URL.encodeQueryString(f.getPrefix());
 319         GetRequest<Folder> getFolder = new GetRequest<Folder>(Folder.class, app.getApiPath(), f.getOwner(), path, f) {
 320             @Override
 321             public void onSuccess(final Folder _result) {
 322                 if (showfiles)
 323                     app.showFiles(_result);
 324                 Iterator<Folder> iter = _result.getSubfolders().iterator();
 325                 fetchFolder(_result.getOwner(), iter, dataProvider, new Command() {
 326                     @Override
 327                     public void execute() {
 328                         dataProvider.getList().clear();
 329                         dataProvider.getList().addAll(_result.getSubfolders());
 330                         app.getOtherSharedTreeView().updateChildren(f);
 331                     }
 332                 });
 333             }
 334
 335             @Override
 336             public void onError(Throwable t) {
 337                 GWT.log("Error getting folder", t);
 338                                 app.setError(t);
 339                 if (t instanceof RestException)
 340                     app.displayError("Error getting folder: " + ((RestException) t).getHttpStatusText());
 341                 else
 342                     app.displayError("System error fetching folder: " + t.getMessage());
 343             }
 344
 345                         @Override
 346                         protected void onUnauthorized(Response response) {
 347                                 app.sessionExpired();
 348                         }
 349         };
 350         getFolder.setHeader("X-Auth-Token", app.getToken());
 351         Scheduler.get().scheduleDeferred(getFolder);
 352     }
 353
 354     public void initialize(Command callback) {
 355         fetchSharingUsers(callback);
 356     }
 357 }