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.Folder;
  43 import gr.grnet.pithos.web.client.othersharedtree.OtherSharedTreeView.Templates;
  44 import gr.grnet.pithos.web.client.rest.GetRequest;
  45 import gr.grnet.pithos.web.client.rest.RestException;
  46
  47 import java.util.HashMap;
  48 import java.util.Iterator;
  49 import java.util.Map;
  50
  51 import com.google.gwt.cell.client.AbstractCell;
  52 import com.google.gwt.cell.client.Cell;
  53 import com.google.gwt.cell.client.TextCell;
  54 import com.google.gwt.cell.client.ValueUpdater;
  55 import com.google.gwt.core.client.GWT;
  56 import com.google.gwt.core.client.Scheduler;
  57 import com.google.gwt.event.dom.client.ContextMenuEvent;
  58 import com.google.gwt.http.client.Response;
  59 import com.google.gwt.http.client.URL;
  60 import com.google.gwt.safehtml.shared.SafeHtml;
  61 import com.google.gwt.safehtml.shared.SafeHtmlBuilder;
  62 import com.google.gwt.text.shared.SafeHtmlRenderer;
  63 import com.google.gwt.user.client.Command;
  64 import com.google.gwt.user.client.ui.AbstractImagePrototype;
  65 import com.google.gwt.view.client.ListDataProvider;
  66 import com.google.gwt.view.client.SingleSelectionModel;
  67 import com.google.gwt.view.client.TreeViewModel;
  68
  69 public class OtherSharedTreeViewModel implements TreeViewModel {
  70
  71     protected Pithos app;
  72
  73     String dummy = "No shares by others yet";
  74
  75     private Cell<Folder> folderCell = new AbstractCell<Folder>(ContextMenuEvent.getType().getName()) {
  76
  77        @Override
  78         public void render(Context context, Folder folder, SafeHtmlBuilder safeHtmlBuilder) {
  79             String html = AbstractImagePrototype.create(OtherSharedTreeView.images.folderYellow()).getHTML();
  80                 safeHtmlBuilder.appendHtmlConstant(html).appendHtmlConstant("&nbsp;");
  81             safeHtmlBuilder.append(Templates.INSTANCE.nameSpan(folder.getName()));
  82         }
  83
  84         @Override
  85         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) {
  86             if (event.getType().equals(ContextMenuEvent.getType().getName())) {
  87                 final int x = event.getClientX();
  88                 final int y = event.getClientY();
  89                 OtherSharedTreeViewModel.this.selectionModel.setSelected(folder, true);
  90                 app.scheduleFolderHeadCommand(folder, new Command() {
  91
  92                                         @Override
  93                                         public void execute() {
  94                                 FolderContextMenu menu = new FolderContextMenu(app, OtherSharedTreeView.images, app.getSelectedTree(), folder);
  95                                 menu.setPopupPosition(x, y);
  96                                 menu.show();
  97                                         }
  98                                 });
  99             }
 100         }
 101     };
 102
 103     protected ListDataProvider<String> userLevelDataProvider = new ListDataProvider<String>();
 104
 105     protected Map<String, ListDataProvider<Folder>> userDataProviderMap = new HashMap<String, ListDataProvider<Folder>>();
 106     private Map<Folder, ListDataProvider<Folder>> dataProviderMap = new HashMap<Folder, ListDataProvider<Folder>>();
 107
 108     protected SingleSelectionModel<Folder> selectionModel;
 109
 110     public OtherSharedTreeViewModel(Pithos _app, SingleSelectionModel<Folder> selectionModel) {
 111         app = _app;
 112         this.selectionModel = selectionModel;
 113     }
 114
 115     @Override
 116     public <T> NodeInfo<?> getNodeInfo(T value) {
 117         if (value == null) {
 118                 fetchSharingUsers(null);
 119             return new DefaultNodeInfo<String>(userLevelDataProvider, new TextCell(new SafeHtmlRenderer<String>() {
 120
 121                                 @Override
 122                                 public SafeHtml render(String object) {
 123                     SafeHtmlBuilder builder = new SafeHtmlBuilder();
 124                     render(object, builder);
 125                     return builder.toSafeHtml();
 126                                 }
 127
 128                                 @Override
 129                                 public void render(String object, SafeHtmlBuilder builder) {
 130                     if (!object.equals(dummy)) {
 131                         String html = AbstractImagePrototype.create(OtherSharedTreeView.images.myShared()).getHTML();
 132                         builder.appendHtmlConstant(html).appendHtmlConstant("&nbsp;");
 133                     }
 134                     builder.append(OtherSharedTreeView.Templates.INSTANCE.nameSpan(object));
 135                                 }
 136                         }), null, null);
 137         }
 138         else if (value instanceof String) {
 139                         String username = (String) value;
 140                         if (userDataProviderMap.get(username) == null) {
 141                                 userDataProviderMap.put(username, new ListDataProvider<Folder>());
 142                         }
 143                         final ListDataProvider<Folder> dataProvider = userDataProviderMap.get(username);
 144                         fetchSharedContainers(username, dataProvider, null);
 145                         return new DefaultNodeInfo<Folder>(dataProvider, folderCell, selectionModel, null);
 146         }
 147         else {
 148             final Folder f = (Folder) value;
 149             if (dataProviderMap.get(f) == null) {
 150                 dataProviderMap.put(f, new ListDataProvider<Folder>());
 151             }
 152             final ListDataProvider<Folder> dataProvider = dataProviderMap.get(f);
 153             fetchFolder(f, dataProvider, false, null);
 154             return new DefaultNodeInfo<Folder>(dataProvider, folderCell, selectionModel, null);
 155         }
 156     }
 157
 158     private void fetchSharingUsers(final Command callback) {
 159         GetRequest<SharingUsers> getSharingUsers = new GetRequest<SharingUsers>(SharingUsers.class, app.getApiPath(), "", "?format=json") {
 160             @Override
 161             public void onSuccess(final SharingUsers _result) {
 162                 userLevelDataProvider.getList().clear();
 163                 userLevelDataProvider.getList().addAll(_result.getUsers());
 164                 if (userLevelDataProvider.getList().isEmpty())
 165                         userLevelDataProvider.getList().add(dummy);
 166                 Iterator<String> iter = _result.getUsers().iterator();
 167                 fetchSharedContainers(iter, callback);
 168             }
 169
 170             @Override
 171             public void onError(Throwable t) {
 172                 GWT.log("Error getting folder", t);
 173                                 app.setError(t);
 174                 if (t instanceof RestException)
 175                     app.displayError("Error getting folder: " + ((RestException) t).getHttpStatusText());
 176                 else
 177                     app.displayError("System error fetching folder: " + t.getMessage());
 178             }
 179
 180                         @Override
 181                         protected void onUnauthorized(Response response) {
 182                                 app.sessionExpired();
 183                         }
 184         };
 185         getSharingUsers.setHeader("X-Auth-Token", app.getUserToken());
 186         Scheduler.get().scheduleDeferred(getSharingUsers);
 187         }
 188
 189         protected void fetchSharedContainers(final Iterator<String> iter, final Command callback) {
 190                 if (iter.hasNext()) {
 191                         String username = iter.next();
 192                         if (userDataProviderMap.get(username) == null) {
 193                                 userDataProviderMap.put(username, new ListDataProvider<Folder>());
 194                         }
 195                         final ListDataProvider<Folder> dataProvider = userDataProviderMap.get(username);
 196                         fetchSharedContainers(username, dataProvider, new Command() {
 197
 198                                 @Override
 199                                 public void execute() {
 200                                         fetchSharedContainers(iter, callback);
 201
 202                                 }
 203                         });
 204                 }
 205                 else
 206                         if (callback != null)
 207                                 callback.execute();
 208         }
 209
 210         @Override
 211     public boolean isLeaf(Object o) {
 212                 if (o == null)
 213                         return userLevelDataProvider.getList().isEmpty();
 214                 else if (o instanceof Folder) {
 215             Folder f = (Folder) o;
 216             return f.getSubfolders().isEmpty();
 217         }
 218                 else {
 219                         ListDataProvider<Folder> dp = userDataProviderMap.get(o);
 220                         if (dp != null)
 221                                 return dp.getList().isEmpty();
 222                         return true;
 223                 }
 224     }
 225
 226         private void fetchSharedContainers(final String username, final ListDataProvider<Folder> dataProvider, final Command callback) {
 227                 GetRequest<AccountResource> getUserSharedContainers = new GetRequest<AccountResource>(AccountResource.class, app.getApiPath(), username, "?format=json") {
 228
 229                         @Override
 230                         public void onSuccess(AccountResource _result) {
 231                         final ListDataProvider<Folder> tempProvider = new ListDataProvider<Folder>();
 232                                 Iterator<Folder> iter = _result.getContainers().iterator();
 233                                 fetchFolder(username, iter, tempProvider, new Command() {
 234
 235                                         @Override
 236                                         public void execute() {
 237                                                 dataProvider.getList().clear();
 238                                                 dataProvider.getList().addAll(tempProvider.getList());
 239                                                 if (callback != null)
 240                                                         callback.execute();
 241                                         }
 242                                 });
 243                         }
 244
 245                         @Override
 246                         public void onError(Throwable t) {
 247                 GWT.log("Error getting account", t);
 248                                 app.setError(t);
 249                 if (t instanceof RestException)
 250                     app.displayError("Error getting account: " + ((RestException) t).getHttpStatusText());
 251                 else
 252                     app.displayError("System error fetching user data: " + t.getMessage());
 253                         }
 254
 255                         @Override
 256                         protected void onUnauthorized(Response response) {
 257                                 app.sessionExpired();
 258                         }
 259                 };
 260                 getUserSharedContainers.setHeader("X-Auth-Token", app.getUserToken());
 261                 Scheduler.get().scheduleDeferred(getUserSharedContainers);
 262         }
 263
 264         protected void fetchFolder(final String username, final Iterator<Folder> iter, final ListDataProvider<Folder> dataProvider, final Command callback) {
 265         if (iter.hasNext()) {
 266             final Folder f = iter.next();
 267
 268             String path = "/" + f.getContainer() + "?format=json&delimiter=/&prefix=" + URL.encodeQueryString(f.getPrefix());
 269             GetRequest<Folder> getFolder = new GetRequest<Folder>(Folder.class, app.getApiPath(), username, path, f) {
 270                 @Override
 271                 public void onSuccess(Folder _result) {
 272                         dataProvider.getList().add(_result);
 273                     fetchFolder(username, iter, dataProvider, callback);
 274                 }
 275
 276                 @Override
 277                 public void onError(Throwable t) {
 278                     GWT.log("Error getting folder", t);
 279                                         app.setError(t);
 280                     if (t instanceof RestException)
 281                         app.displayError("Error getting folder: " + ((RestException) t).getHttpStatusText());
 282                     else
 283                         app.displayError("System error fetching folder: " + t.getMessage());
 284                 }
 285
 286                                 @Override
 287                                 protected void onUnauthorized(Response response) {
 288                                         app.sessionExpired();
 289                                 }
 290             };
 291             getFolder.setHeader("X-Auth-Token", app.getUserToken());
 292             Scheduler.get().scheduleDeferred(getFolder);
 293         }
 294         else if (callback != null)
 295             callback.execute();
 296     }
 297
 298     public Folder getSelection() {
 299         return selectionModel.getSelectedObject();
 300     }
 301
 302     public void updateFolder(Folder folder, boolean showfiles, Command callback) {
 303         if (dataProviderMap.get(folder) == null) {
 304             dataProviderMap.put(folder, new ListDataProvider<Folder>());
 305         }
 306         final ListDataProvider<Folder> dataProvider = dataProviderMap.get(folder);
 307         fetchFolder(folder, dataProvider, showfiles, callback);
 308     }
 309
 310     public void fetchFolder(final Folder f, final ListDataProvider<Folder> dataProvider, final boolean showfiles, final Command callback) {
 311         String path = "/" + f.getContainer() + "?format=json&delimiter=/&prefix=" + URL.encodeQueryString(f.getPrefix());
 312         GetRequest<Folder> getFolder = new GetRequest<Folder>(Folder.class, app.getApiPath(), f.getOwnerID(), path, f) {
 313             @Override
 314             public void onSuccess(final Folder _result) {
 315                 if (showfiles)
 316                     app.showFiles(_result);
 317                 Iterator<Folder> iter = _result.getSubfolders().iterator();
 318                 fetchFolder(_result.getOwnerID(), iter, dataProvider, new Command() {
 319                     @Override
 320                     public void execute() {
 321                         dataProvider.getList().clear();
 322                         dataProvider.getList().addAll(_result.getSubfolders());
 323                         app.getOtherSharedTreeView().updateChildren(f);
 324                         if (callback != null)
 325                                 callback.execute();
 326                     }
 327                 });
 328             }
 329
 330             @Override
 331             public void onError(Throwable t) {
 332                 GWT.log("Error getting folder", t);
 333                                 app.setError(t);
 334                 if (t instanceof RestException)
 335                     app.displayError("Error getting folder: " + ((RestException) t).getHttpStatusText());
 336                 else
 337                     app.displayError("System error fetching folder: " + t.getMessage());
 338             }
 339
 340                         @Override
 341                         protected void onUnauthorized(Response response) {
 342                                 app.sessionExpired();
 343                         }
 344         };
 345         getFolder.setHeader("X-Auth-Token", app.getUserToken());
 346         Scheduler.get().scheduleDeferred(getFolder);
 347     }
 348
 349     public void initialize(Command callback) {
 350         fetchSharingUsers(callback);
 351     }
 352 }