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 com.google.gwt.cell.client.AbstractCell;
  39 import com.google.gwt.cell.client.Cell;
  40 import com.google.gwt.cell.client.TextCell;
  41 import com.google.gwt.cell.client.ValueUpdater;
  42 import com.google.gwt.core.client.GWT;
  43 import com.google.gwt.core.client.Scheduler;
  44 import com.google.gwt.event.dom.client.ContextMenuEvent;
  45 import com.google.gwt.http.client.Request;
  46 import com.google.gwt.http.client.Response;
  47 import com.google.gwt.http.client.URL;
  48 import com.google.gwt.json.client.JSONObject;
  49 import com.google.gwt.safehtml.shared.SafeHtml;
  50 import com.google.gwt.safehtml.shared.SafeHtmlBuilder;
  51 import com.google.gwt.text.shared.SafeHtmlRenderer;
  52 import com.google.gwt.user.client.Command;
  53 import com.google.gwt.user.client.ui.AbstractImagePrototype;
  54 import com.google.gwt.view.client.ListDataProvider;
  55 import com.google.gwt.view.client.SingleSelectionModel;
  56 import com.google.gwt.view.client.TreeViewModel;
  57 import gr.grnet.pithos.web.client.FolderContextMenu;
  58 import gr.grnet.pithos.web.client.Pithos;
  59 import gr.grnet.pithos.web.client.SharingUsers;
  60 import gr.grnet.pithos.web.client.catalog.GetUserCatalogs;
  61 import gr.grnet.pithos.web.client.catalog.UpdateUserCatalogs;
  62 import gr.grnet.pithos.web.client.catalog.UserCatalogs;
  63 import gr.grnet.pithos.web.client.foldertree.AccountResource;
  64 import gr.grnet.pithos.web.client.foldertree.Folder;
  65 import gr.grnet.pithos.web.client.othersharedtree.OtherSharedTreeView.Templates;
  66 import gr.grnet.pithos.web.client.rest.GetRequest;
  67 import gr.grnet.pithos.web.client.rest.RestException;
  68
  69 import java.util.HashMap;
  70 import java.util.Iterator;
  71 import java.util.List;
  72 import java.util.Map;
  73
  74 public class OtherSharedTreeViewModel implements TreeViewModel {
  75
  76     protected Pithos app;
  77
  78     final String dummy = "No shares by others yet";
  79
  80     private Cell<Folder> folderCell = new AbstractCell<Folder>(ContextMenuEvent.getType().getName()) {
  81
  82         @Override
  83         public void render(Context context, Folder folder, SafeHtmlBuilder safeHtmlBuilder) {
  84             String html = AbstractImagePrototype.create(OtherSharedTreeView.images.folderYellow()).getHTML();
  85             safeHtmlBuilder.appendHtmlConstant(html).appendHtmlConstant("&nbsp;");
  86             safeHtmlBuilder.append(Templates.INSTANCE.nameSpan(folder.getName()));
  87         }
  88
  89         @Override
  90         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) {
  91             if(event.getType().equals(ContextMenuEvent.getType().getName())) {
  92                 final int x = event.getClientX();
  93                 final int y = event.getClientY();
  94                 OtherSharedTreeViewModel.this.selectionModel.setSelected(folder, true);
  95                 app.scheduleFolderHeadCommand(folder, new Command() {
  96
  97                     @Override
  98                     public void execute() {
  99                         FolderContextMenu menu = new FolderContextMenu(app, OtherSharedTreeView.images, app.getSelectedTree(), folder);
 100                         menu.setPopupPosition(x, y);
 101                         menu.show();
 102                     }
 103                 });
 104             }
 105         }
 106     };
 107
 108     protected ListDataProvider<String> userLevelDataProviderForIDs = new ListDataProvider<String>();
 109 //    protected ListDataProvider<String> userLevelDataProviderForDisplayNames = new ListDataProvider<String>();
 110
 111     protected Map<String, ListDataProvider<Folder>> userDataProviderMap = new HashMap<String, ListDataProvider<Folder>>();
 112     private Map<Folder, ListDataProvider<Folder>> dataProviderMap = new HashMap<Folder, ListDataProvider<Folder>>();
 113
 114     protected SingleSelectionModel<Folder> selectionModel;
 115
 116     public OtherSharedTreeViewModel(Pithos _app, SingleSelectionModel<Folder> selectionModel) {
 117         app = _app;
 118         this.selectionModel = selectionModel;
 119     }
 120
 121     @Override
 122     public <T> NodeInfo<?> getNodeInfo(T value) {
 123         if(value == null) {
 124 //            LOG("getNodeInfo(null), calling fetchSharingUsers(null)");
 125             fetchSharingUsers(null);
 126 //            LOG("getNodeInfo(null), called fetchSharingUsers(null)");
 127             return new DefaultNodeInfo<String>(userLevelDataProviderForIDs, new TextCell(new SafeHtmlRenderer<String>() {
 128                 @Override
 129                 public SafeHtml render(String object) {
 130                     final String displayName = app.getUserDisplayNameForID(object);
 131 //                    LOG("render(userID = "+object+"), displayName = " + displayName);
 132                     SafeHtmlBuilder builder = new SafeHtmlBuilder();
 133                     render(displayName, builder);
 134                     return builder.toSafeHtml();
 135                 }
 136
 137                 @Override
 138                 public void render(String object, SafeHtmlBuilder builder) {
 139                     if(!object.equals(dummy)) {
 140 //                        LOG("render(userID [not dummy] = "+object+")");
 141                         String html = AbstractImagePrototype.create(OtherSharedTreeView.images.myShared()).getHTML();
 142                         builder.appendHtmlConstant(html).appendHtmlConstant("&nbsp;");
 143                     }
 144                     final String displayName = app.getUserDisplayNameForID(object);
 145                     builder.append(OtherSharedTreeView.Templates.INSTANCE.nameSpan(object));
 146                 }
 147             }), null, null);
 148         }
 149         else if(value instanceof String) {
 150 //            LOG("getNodeInfo(String "+value+"), called with userID");
 151             final String userID = (String) value;
 152
 153             if(userDataProviderMap.get(userID) == null) {
 154                 userDataProviderMap.put(userID, new ListDataProvider<Folder>());
 155             }
 156             final ListDataProvider<Folder> userIDDataProvider = userDataProviderMap.get(userID);
 157             fetchSharedContainers(userID, userIDDataProvider, null);
 158
 159             return new DefaultNodeInfo<Folder>(userIDDataProvider, folderCell, selectionModel, null);
 160         }
 161         else {
 162 //            LOG("getNodeInfo(Folder "+value+"), called with a folder");
 163             final Folder f = (Folder) value;
 164             if(dataProviderMap.get(f) == null) {
 165                 dataProviderMap.put(f, new ListDataProvider<Folder>());
 166             }
 167             final ListDataProvider<Folder> dataProvider = dataProviderMap.get(f);
 168             fetchFolder(f, dataProvider, false, null);
 169             return new DefaultNodeInfo<Folder>(dataProvider, folderCell, selectionModel, null);
 170         }
 171     }
 172
 173 //    native void LOG(String message) /*-{
 174 //      console.log(message );
 175 //    }-*/;
 176
 177     private void fetchSharingUsers(final Command callback) {
 178         GetRequest<SharingUsers> getSharingUsers = new GetRequest<SharingUsers>(app, SharingUsers.class, app.getApiPath(), "", "?format=json") {
 179             @Override
 180             public void onSuccess(final SharingUsers _result) {
 181                 userLevelDataProviderForIDs.getList().clear();
 182
 183                 final List<String> userIDs = _result.getUserIDs();
 184 //                for(String userID : userIDs) {
 185 //                    LOG("fetchSharingUsers(): userID =" + userID);
 186 //                }
 187                 final List<String> userIDsWithUnknownDisplayNames = app.filterUserIDsWithUnknownDisplayName(userIDs);
 188 //                for(String userID : userIDsWithUnknownDisplayNames) {
 189 //                    LOG("fetchSharingUsers(): userID (with unknown name) =" + userID);
 190 //                }
 191
 192                 userLevelDataProviderForIDs.getList().addAll(userIDs);
 193                 if(userLevelDataProviderForIDs.getList().isEmpty()) {
 194                     userLevelDataProviderForIDs.getList().add(dummy);
 195 //                    userLevelDataProviderForDisplayNames.getList().add(dummy);
 196                 } else {
 197 //                    userLevelDataProviderForDisplayNames.getList().addAll(app.getUserDisplayNamesForIDs(userIDs));
 198                 }
 199
 200                 if(userIDsWithUnknownDisplayNames.size() == 0) {
 201                     // All display names are known, so we proceed directly
 202                     fetchSharedContainers(userLevelDataProviderForIDs.getList().iterator(), callback);
 203                 } else {
 204                     // First fetch unknown display names and then proceed
 205                     new UpdateUserCatalogs(app, userIDsWithUnknownDisplayNames) {
 206                         @Override
 207                         public void onSuccess(UserCatalogs requestedUserCatalogs, UserCatalogs updatedUserCatalogs) {
 208                             fetchSharedContainers(userLevelDataProviderForIDs.getList().iterator(), callback);
 209                         }
 210
 211                         @Override
 212                         public void onError(Request request, Throwable t) {
 213                             super.onError(request, t);
 214                             app.setError(t);
 215                         }
 216                     }.scheduleDeferred();
 217                 }
 218             }
 219
 220             @Override
 221             public void onError(Throwable t) {
 222                 GWT.log("Error getting folder", t);
 223                 app.setError(t);
 224                 if(t instanceof RestException) {
 225                     app.displayError("Error getting folder: " + ((RestException) t).getHttpStatusText());
 226                 }
 227                 else {
 228                     app.displayError("System error fetching folder: " + t.getMessage());
 229                 }
 230             }
 231
 232             @Override
 233             protected void onUnauthorized(Response response) {
 234                 app.sessionExpired();
 235             }
 236         };
 237         getSharingUsers.setHeader("X-Auth-Token", app.getUserToken());
 238         Scheduler.get().scheduleDeferred(getSharingUsers);
 239     }
 240
 241     protected void fetchSharedContainers(final Iterator<String> userIDsIterator, final Command callback) {
 242         if(userIDsIterator.hasNext()) {
 243             String userID = userIDsIterator.next();
 244             if(userDataProviderMap.get(userID) == null) {
 245                 userDataProviderMap.put(userID, new ListDataProvider<Folder>());
 246             }
 247             final ListDataProvider<Folder> dataProvider = userDataProviderMap.get(userID);
 248             fetchSharedContainers(userID, dataProvider, new Command() {
 249
 250                 @Override
 251                 public void execute() {
 252                     fetchSharedContainers(userIDsIterator, callback);
 253
 254                 }
 255             });
 256         }
 257         else if(callback != null) {
 258             callback.execute();
 259         }
 260     }
 261
 262     @Override
 263     public boolean isLeaf(Object o) {
 264         if(o == null) {
 265             boolean result =  userLevelDataProviderForIDs.getList().isEmpty();
 266 //            LOG("isLeaf(null) ==> " + result);
 267             return result;
 268         }
 269         else if(o instanceof Folder) {
 270             Folder folder = (Folder) o;
 271             boolean result = folder.getSubfolders().isEmpty();
 272 //            LOG("isLeaf(Folder "+folder+") ==> " + result);
 273             return result;
 274         }
 275         else {
 276             ListDataProvider<Folder> dp = userDataProviderMap.get(o);
 277             if(dp != null) {
 278                 boolean result =  dp.getList().isEmpty();
 279 //                LOG("isLeaf("+o.getClass().getName()+" "+o+") ==> " + result);
 280                 return result;
 281             }
 282 //            LOG("isLeaf("+o.getClass().getName()+" "+o+") ==> (true)");
 283             return true;
 284         }
 285     }
 286
 287     private void fetchSharedContainers(final String userID, final ListDataProvider<Folder> dataProvider, final Command callback) {
 288         GetRequest<AccountResource> getUserSharedContainers = new GetRequest<AccountResource>(app, AccountResource.class, app.getApiPath(), userID, "?format=json") {
 289
 290             @Override
 291             public void onSuccess(AccountResource _result) {
 292                 final ListDataProvider<Folder> tempProvider = new ListDataProvider<Folder>();
 293                 Iterator<Folder> folderIterator = _result.getContainers().iterator();
 294                 fetchFolder(userID, folderIterator, tempProvider, new Command() {
 295
 296                     @Override
 297                     public void execute() {
 298                         dataProvider.getList().clear();
 299                         dataProvider.getList().addAll(tempProvider.getList());
 300                         if(callback != null) {
 301                             callback.execute();
 302                         }
 303                     }
 304                 });
 305             }
 306
 307             @Override
 308             public void onError(Throwable t) {
 309                 GWT.log("Error getting account", t);
 310                 app.setError(t);
 311                 if(t instanceof RestException) {
 312                     app.displayError("Error getting account: " + ((RestException) t).getHttpStatusText());
 313                 }
 314                 else {
 315                     app.displayError("System error fetching user data: " + t.getMessage());
 316                 }
 317             }
 318
 319             @Override
 320             protected void onUnauthorized(Response response) {
 321                 app.sessionExpired();
 322             }
 323         };
 324         getUserSharedContainers.setHeader("X-Auth-Token", app.getUserToken());
 325         Scheduler.get().scheduleDeferred(getUserSharedContainers);
 326     }
 327
 328     protected void fetchFolder(final String userID, final Iterator<Folder> folderIterator, final ListDataProvider<Folder> dataProvider, final Command callback) {
 329         if(folderIterator.hasNext()) {
 330             final Folder f = folderIterator.next();
 331
 332             String path = "/" + f.getContainer() + "?format=json&delimiter=/&prefix=" + URL.encodeQueryString(f.getPrefix());
 333             GetRequest<Folder> getFolder = new GetRequest<Folder>(app, Folder.class, app.getApiPath(), userID, path, f) {
 334                 @Override
 335                 public void onSuccess(Folder _result) {
 336                     dataProvider.getList().add(_result);
 337                     fetchFolder(userID, folderIterator, dataProvider, callback);
 338                 }
 339
 340                 @Override
 341                 public void onError(Throwable t) {
 342                     GWT.log("Error getting folder", t);
 343                     app.setError(t);
 344                     if(t instanceof RestException) {
 345                         app.displayError("Error getting folder: " + ((RestException) t).getHttpStatusText());
 346                     }
 347                     else {
 348                         app.displayError("System error fetching folder: " + t.getMessage());
 349                     }
 350                 }
 351
 352                 @Override
 353                 protected void onUnauthorized(Response response) {
 354                     app.sessionExpired();
 355                 }
 356             };
 357             getFolder.setHeader("X-Auth-Token", app.getUserToken());
 358             Scheduler.get().scheduleDeferred(getFolder);
 359         }
 360         else if(callback != null) {
 361             callback.execute();
 362         }
 363     }
 364
 365     public Folder getSelection() {
 366         return selectionModel.getSelectedObject();
 367     }
 368
 369     public void updateFolder(Folder folder, boolean showfiles, Command callback) {
 370         if(dataProviderMap.get(folder) == null) {
 371             dataProviderMap.put(folder, new ListDataProvider<Folder>());
 372         }
 373         final ListDataProvider<Folder> dataProvider = dataProviderMap.get(folder);
 374         fetchFolder(folder, dataProvider, showfiles, callback);
 375     }
 376
 377     public void fetchFolder(final Folder f, final ListDataProvider<Folder> dataProvider, final boolean showfiles, final Command callback) {
 378         String path = "/" + f.getContainer() + "?format=json&delimiter=/&prefix=" + URL.encodeQueryString(f.getPrefix());
 379         GetRequest<Folder> getFolder = new GetRequest<Folder>(app, Folder.class, app.getApiPath(), f.getOwnerID(), path, f) {
 380             @Override
 381             public void onSuccess(final Folder _result) {
 382                 if(showfiles) {
 383                     app.showFiles(_result);
 384                 }
 385                 Iterator<Folder> iter = _result.getSubfolders().iterator();
 386                 fetchFolder(_result.getOwnerID(), iter, dataProvider, new Command() {
 387                     @Override
 388                     public void execute() {
 389                         dataProvider.getList().clear();
 390                         dataProvider.getList().addAll(_result.getSubfolders());
 391                         app.getOtherSharedTreeView().updateChildren(f);
 392                         if(callback != null) {
 393                             callback.execute();
 394                         }
 395                     }
 396                 });
 397             }
 398
 399             @Override
 400             public void onError(Throwable t) {
 401                 GWT.log("Error getting folder", t);
 402                 app.setError(t);
 403                 if(t instanceof RestException) {
 404                     app.displayError("Error getting folder: " + ((RestException) t).getHttpStatusText());
 405                 }
 406                 else {
 407                     app.displayError("System error fetching folder: " + t.getMessage());
 408                 }
 409             }
 410
 411             @Override
 412             protected void onUnauthorized(Response response) {
 413                 app.sessionExpired();
 414             }
 415         };
 416         getFolder.setHeader("X-Auth-Token", app.getUserToken());
 417         Scheduler.get().scheduleDeferred(getFolder);
 418     }
 419
 420     public void initialize(Command callback) {
 421         fetchSharingUsers(callback);
 422     }
 423 }