code.grnet.gr Git - pithos-web-client/blob - src/gr/grnet/pithos/web/client/mysharedtree/MysharedTreeViewModel.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.mysharedtree;
  37
  38 import gr.grnet.pithos.web.client.FolderContextMenu;
  39 import gr.grnet.pithos.web.client.Pithos;
  40 import gr.grnet.pithos.web.client.foldertree.AccountResource;
  41 import gr.grnet.pithos.web.client.foldertree.File;
  42 import gr.grnet.pithos.web.client.foldertree.Folder;
  43 import gr.grnet.pithos.web.client.foldertree.FolderTreeView;
  44 import gr.grnet.pithos.web.client.mysharedtree.MysharedTreeView.Templates;
  45 import gr.grnet.pithos.web.client.rest.GetRequest;
  46 import gr.grnet.pithos.web.client.rest.RestException;
  47
  48 import java.util.ArrayList;
  49 import java.util.HashMap;
  50 import java.util.HashSet;
  51 import java.util.Iterator;
  52 import java.util.List;
  53 import java.util.Map;
  54 import java.util.Set;
  55
  56 import com.google.gwt.cell.client.AbstractCell;
  57 import com.google.gwt.cell.client.Cell;
  58 import com.google.gwt.cell.client.TextCell;
  59 import com.google.gwt.cell.client.ValueUpdater;
  60 import com.google.gwt.core.client.GWT;
  61 import com.google.gwt.core.client.Scheduler;
  62 import com.google.gwt.event.dom.client.ContextMenuEvent;
  63 import com.google.gwt.http.client.Response;
  64 import com.google.gwt.http.client.URL;
  65 import com.google.gwt.safehtml.shared.SafeHtml;
  66 import com.google.gwt.safehtml.shared.SafeHtmlBuilder;
  67 import com.google.gwt.text.shared.SafeHtmlRenderer;
  68 import com.google.gwt.user.client.Command;
  69 import com.google.gwt.user.client.ui.AbstractImagePrototype;
  70 import com.google.gwt.view.client.ListDataProvider;
  71 import com.google.gwt.view.client.SelectionChangeEvent;
  72 import com.google.gwt.view.client.SelectionChangeEvent.Handler;
  73 import com.google.gwt.view.client.SingleSelectionModel;
  74 import com.google.gwt.view.client.TreeViewModel;
  75
  76 public class MysharedTreeViewModel implements TreeViewModel {
  77
  78     protected Pithos app;
  79
  80     private Cell<Folder> folderCell = new AbstractCell<Folder>() {
  81
  82        @Override
  83         public void render(Context context, Folder folder, SafeHtmlBuilder safeHtmlBuilder) {
  84             String html = AbstractImagePrototype.create(MysharedTreeView.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                 MysharedTreeViewModel.this.selectionModel.setSelected(folder, true);
  95                 app.scheduleFolderHeadCommand(folder, new Command() {
  96
  97                                         @Override
  98                                         public void execute() {
  99                                 FolderContextMenu menu = new FolderContextMenu(app, MysharedTreeView.images, app.getSelectedTree(), folder);
 100                                 menu.setPopupPosition(x, y);
 101                                 menu.show();
 102                                         }
 103                                 });
 104             }
 105         }
 106     };
 107
 108     protected ListDataProvider<Folder> firstLevelDataProvider = new ListDataProvider<Folder>();
 109
 110     private Map<Folder, ListDataProvider<Folder>> dataProviderMap = new HashMap<Folder, ListDataProvider<Folder>>();
 111
 112     protected SingleSelectionModel<Folder> selectionModel;
 113
 114     public MysharedTreeViewModel(Pithos _app, SingleSelectionModel<Folder> selectionModel) {
 115         app = _app;
 116         this.selectionModel = selectionModel;
 117     }
 118
 119     @Override
 120     public <T> NodeInfo<?> getNodeInfo(T value) {
 121         if (value == null) {
 122                 fetchSharedContainers(null);
 123             return new DefaultNodeInfo<Folder>(firstLevelDataProvider, folderCell, selectionModel, null);
 124         }
 125         final Folder f = (Folder) value;
 126         if (dataProviderMap.get(f) == null) {
 127             dataProviderMap.put(f, new ListDataProvider<Folder>());
 128         }
 129         final ListDataProvider<Folder> dataProvider = dataProviderMap.get(f);
 130         fetchFolder(f, dataProvider, false);
 131         return new DefaultNodeInfo<Folder>(dataProvider, folderCell, selectionModel, null);
 132     }
 133
 134         private void fetchSharedContainers(final Command callback) {
 135         String path = "?format=json&shared=";
 136         GetRequest<AccountResource> getAccount = new GetRequest<AccountResource>(AccountResource.class, app.getApiPath(), app.getUsername(), path) {
 137             @Override
 138             public void onSuccess(final AccountResource _result) {
 139                 Iterator<Folder> iter = _result.getContainers().listIterator();
 140                 fetchFolder(iter, new Command() {
 141
 142                                         @Override
 143                                         public void execute() {
 144                                                 firstLevelDataProvider.getList().clear();
 145                                 Folder t = null;
 146                                 for (Folder c : _result.getContainers()) {
 147                                         if (c.isHome())
 148                                                 firstLevelDataProvider.getList().add(0, c); //Pithos is always first
 149                                         else if (!c.isTrash())
 150                                                 firstLevelDataProvider.getList().add(c);
 151                                 }
 152                                                 if (callback != null)
 153                                                         callback.execute();
 154                                         }
 155                                 });
 156             }
 157
 158             @Override
 159             public void onError(Throwable t) {
 160                 GWT.log("Error getting account", t);
 161                                 app.setError(t);
 162                 if (t instanceof RestException)
 163                     app.displayError("Error getting account: " + ((RestException) t).getHttpStatusText());
 164                 else
 165                     app.displayError("System error fetching user data: " + t.getMessage());
 166             }
 167
 168                         @Override
 169                         protected void onUnauthorized(Response response) {
 170                                 app.sessionExpired();
 171                         }
 172         };
 173         getAccount.setHeader("X-Auth-Token", app.getToken());
 174         Scheduler.get().scheduleDeferred(getAccount);
 175         }
 176
 177         @Override
 178     public boolean isLeaf(Object o) {
 179                 if (o == null)
 180                         return false;
 181                 else if (o instanceof Folder) {
 182             Folder f = (Folder) o;
 183             return f.getSubfolders().isEmpty();
 184         }
 185                 else {
 186                         return firstLevelDataProvider.getList().isEmpty();
 187                 }
 188     }
 189
 190         private native void log(String msg) /*-{
 191                 $wnd.console.log(msg);
 192         }-*/;
 193
 194     protected void fetchFolder(final Iterator<Folder> iter, final Command callback) {
 195         if (iter.hasNext()) {
 196             final Folder f = iter.next();
 197
 198             String path = "/" + f.getContainer() + "?format=json&shared=&delimiter=/&prefix=" + URL.encodeQueryString(f.getPrefix());
 199             GetRequest<Folder> getFolder = new GetRequest<Folder>(Folder.class, app.getApiPath(), f.getOwner(), path, f) {
 200                 @Override
 201                 public void onSuccess(Folder _result) {
 202                     fetchFolder(iter, callback);
 203                 }
 204
 205                 @Override
 206                 public void onError(Throwable t) {
 207                     GWT.log("Error getting folder", t);
 208                                         app.setError(t);
 209                     if (t instanceof RestException)
 210                         app.displayError("Error getting folder: " + ((RestException) t).getHttpStatusText());
 211                     else
 212                         app.displayError("System error fetching folder: " + t.getMessage());
 213                 }
 214
 215                                 @Override
 216                                 protected void onUnauthorized(Response response) {
 217                                         app.sessionExpired();
 218                                 }
 219             };
 220             getFolder.setHeader("X-Auth-Token", app.getToken());
 221             Scheduler.get().scheduleDeferred(getFolder);
 222         }
 223         else if (callback != null)
 224             callback.execute();
 225     }
 226
 227     public Folder getSelection() {
 228         return selectionModel.getSelectedObject();
 229     }
 230
 231     public void updateFolder(Folder folder, boolean showfiles) {
 232         if (dataProviderMap.get(folder) == null) {
 233             dataProviderMap.put(folder, new ListDataProvider<Folder>());
 234         }
 235         final ListDataProvider<Folder> dataProvider = dataProviderMap.get(folder);
 236         fetchFolder(folder, dataProvider, showfiles);
 237     }
 238
 239     public void fetchFolder(final Folder f, final ListDataProvider<Folder> dataProvider, final boolean showfiles) {
 240         String path = "/" + f.getContainer() + "?format=json&shared=&delimiter=/&prefix=" + URL.encodeQueryString(f.getPrefix());
 241         GetRequest<Folder> getFolder = new GetRequest<Folder>(Folder.class, app.getApiPath(), f.getOwner(), path, f) {
 242             @Override
 243             public void onSuccess(final Folder _result) {
 244                 if (showfiles)
 245                     app.showFiles(_result);
 246                 Iterator<Folder> iter = new ArrayList<Folder>(_result.getSubfolders()).listIterator();
 247                 fetchFolder(iter, new Command() {
 248                     @Override
 249                     public void execute() {
 250                         dataProvider.getList().clear();
 251                                 dataProvider.getList().addAll(_result.getSubfolders());
 252                         app.getMySharedTreeView().updateChildren(f);
 253                     }
 254                 });
 255             }
 256
 257             @Override
 258             public void onError(Throwable t) {
 259                 GWT.log("Error getting folder", t);
 260                                 app.setError(t);
 261                 if (t instanceof RestException)
 262                     app.displayError("Error getting folder: " + ((RestException) t).getHttpStatusText());
 263                 else
 264                     app.displayError("System error fetching folder: " + t.getMessage());
 265             }
 266
 267                         @Override
 268                         protected void onUnauthorized(Response response) {
 269                                 app.sessionExpired();
 270                         }
 271         };
 272         getFolder.setHeader("X-Auth-Token", app.getToken());
 273         Scheduler.get().scheduleDeferred(getFolder);
 274     }
 275
 276         public void initialize(Command callback) {
 277                 fetchSharedContainers(callback);
 278         }
 279 }