code.grnet.gr Git - pithos-web-client/blob - src/gr/grnet/pithos/web/client/mysharedtree/MysharedTreeViewModel.java

   1 /*
   2  * Copyright 2011 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.Folder;
  41 import gr.grnet.pithos.web.client.mysharedtree.MysharedTreeView.Templates;
  42 import gr.grnet.pithos.web.client.rest.GetRequest;
  43 import gr.grnet.pithos.web.client.rest.RestException;
  44
  45 import java.util.HashMap;
  46 import java.util.Iterator;
  47 import java.util.List;
  48 import java.util.Map;
  49
  50 import com.google.gwt.cell.client.AbstractCell;
  51 import com.google.gwt.cell.client.Cell;
  52 import com.google.gwt.cell.client.TextCell;
  53 import com.google.gwt.cell.client.ValueUpdater;
  54 import com.google.gwt.core.client.GWT;
  55 import com.google.gwt.core.client.Scheduler;
  56 import com.google.gwt.event.dom.client.ContextMenuEvent;
  57 import com.google.gwt.safehtml.shared.SafeHtml;
  58 import com.google.gwt.safehtml.shared.SafeHtmlBuilder;
  59 import com.google.gwt.text.shared.SafeHtmlRenderer;
  60 import com.google.gwt.user.client.Command;
  61 import com.google.gwt.user.client.ui.AbstractImagePrototype;
  62 import com.google.gwt.view.client.ListDataProvider;
  63 import com.google.gwt.view.client.SelectionChangeEvent;
  64 import com.google.gwt.view.client.SelectionChangeEvent.Handler;
  65 import com.google.gwt.view.client.SingleSelectionModel;
  66 import com.google.gwt.view.client.TreeViewModel;
  67
  68 public class MysharedTreeViewModel implements TreeViewModel {
  69
  70     protected Pithos app;
  71
  72     private Cell<Folder> folderCell = new AbstractCell<Folder>(ContextMenuEvent.getType().getName()) {
  73
  74        @Override
  75         public void render(Context context, Folder folder, SafeHtmlBuilder safeHtmlBuilder) {
  76             String html = AbstractImagePrototype.create(MysharedTreeView.images.folderYellow()).getHTML();
  77             safeHtmlBuilder.appendHtmlConstant(html);
  78             safeHtmlBuilder.append(Templates.INSTANCE.nameSpan(folder.getName()));
  79         }
  80
  81         @Override
  82         public void onBrowserEvent(Context context, com.google.gwt.dom.client.Element parent, Folder folder, com.google.gwt.dom.client.NativeEvent event, ValueUpdater<Folder> valueUpdater) {
  83             if (event.getType().equals(ContextMenuEvent.getType().getName())) {
  84                 MysharedTreeViewModel.this.selectionModel.setSelected(folder, true);
  85                 FolderContextMenu menu = new FolderContextMenu(app, MysharedTreeView.images, folder);
  86                 menu.setPopupPosition(event.getClientX(), event.getClientY());
  87                 menu.show();
  88             }
  89         }
  90     };
  91
  92     private ListDataProvider<String> rootDataProvider = new ListDataProvider<String>();
  93     private ListDataProvider<Folder> firstLevelDataProvider = new ListDataProvider<Folder>();
  94
  95     private Map<Folder, ListDataProvider<Folder>> dataProviderMap = new HashMap<Folder, ListDataProvider<Folder>>();
  96
  97     private SingleSelectionModel<Folder> selectionModel;
  98
  99     public MysharedTreeViewModel(Pithos _app, SingleSelectionModel<Folder> selectionModel) {
 100         app = _app;
 101         this.selectionModel = selectionModel;
 102     }
 103
 104     @Override
 105     public <T> NodeInfo<?> getNodeInfo(T value) {
 106         if (value == null) {
 107             rootDataProvider.getList().add("My Shared");
 108             final SingleSelectionModel<String> selectionModel2 = new SingleSelectionModel<String>();
 109             selectionModel2.addSelectionChangeHandler(new Handler() {
 110
 111                 @Override
 112                 public void onSelectionChange(SelectionChangeEvent event) {
 113                     if (selectionModel2.getSelectedObject() != null) {
 114                         app.deselectOthers(selectionModel2);
 115                     }
 116                 }
 117             });
 118             app.addSelectionModel(selectionModel2);
 119             return new DefaultNodeInfo<String>(rootDataProvider, new TextCell(new SafeHtmlRenderer<String>() {
 120                 @Override
 121                 public SafeHtml render(String object) {
 122                     SafeHtmlBuilder builder = new SafeHtmlBuilder();
 123                     render(object, builder);
 124                     return builder.toSafeHtml();
 125                 }
 126
 127                 @Override
 128                 public void render(String object, SafeHtmlBuilder builder) {
 129                     String html = AbstractImagePrototype.create(MysharedTreeView.images.myShared()).getHTML();
 130                     builder.appendHtmlConstant(html);
 131                     builder.append(MysharedTreeView.Templates.INSTANCE.nameSpan(object));
 132                 }
 133             }),  selectionModel2, null);
 134         }
 135         else if (value instanceof String) {
 136                 fetchSharedFolders(firstLevelDataProvider);
 137             return new DefaultNodeInfo<Folder>(firstLevelDataProvider, folderCell, selectionModel, null);
 138         }
 139         else {
 140             final Folder f = (Folder) value;
 141             if (dataProviderMap.get(f) == null) {
 142                 dataProviderMap.put(f, new ListDataProvider<Folder>());
 143             }
 144             final ListDataProvider<Folder> dataProvider = dataProviderMap.get(f);
 145             fetchFolder(f, dataProvider, false);
 146             return new DefaultNodeInfo<Folder>(dataProvider, folderCell, selectionModel, null);
 147         }
 148     }
 149
 150     private void fetchSharedFolders(final ListDataProvider<Folder> dataProvider) {
 151         Folder pithos = new Folder(Pithos.HOME_CONTAINER);
 152         pithos.setContainer(Pithos.HOME_CONTAINER);
 153         String path = "/" + pithos.getContainer()  + "?format=json&shared=";
 154         GetRequest<Folder> getFolder = new GetRequest<Folder>(Folder.class, app.getApiPath(), app.getUsername(), path, pithos) {
 155             @Override
 156             public void onSuccess(final Folder result) {
 157 //                if (showfiles)
 158 //                    app.showFiles(result);
 159                 Iterator<Folder> iter = result.getSubfolders().iterator();
 160                 fetchFolder(iter, new Command() {
 161                     @Override
 162                     public void execute() {
 163                         dataProvider.getList().clear();
 164                         dataProvider.getList().addAll(result.getSubfolders());
 165 //                        app.getMySharedTreeView().updateChildren(f);
 166                     }
 167                 });
 168             }
 169
 170             @Override
 171             public void onError(Throwable t) {
 172                 GWT.log("Error getting folder", t);
 173                 if (t instanceof RestException)
 174                     app.displayError("Error getting folder: " + ((RestException) t).getHttpStatusText());
 175                 else
 176                     app.displayError("System error fetching folder: " + t.getMessage());
 177             }
 178         };
 179         getFolder.setHeader("X-Auth-Token", app.getToken());
 180         Scheduler.get().scheduleDeferred(getFolder);
 181         }
 182
 183         @Override
 184     public boolean isLeaf(Object o) {
 185         if (o instanceof Folder) {
 186             Folder f = (Folder) o;
 187             return f.getSubfolders().isEmpty();
 188         }
 189         return false;
 190     }
 191
 192     protected void fetchFolder(final Iterator<Folder> iter, final Command callback) {
 193         if (iter.hasNext()) {
 194             final Folder f = iter.next();
 195
 196             String path = "/" + f.getContainer() + "?format=json&delimiter=/&prefix=" + f.getPrefix();
 197             GetRequest<Folder> getFolder = new GetRequest<Folder>(Folder.class, app.getApiPath(), app.getUsername(), path, f) {
 198                 @Override
 199                 public void onSuccess(Folder result) {
 200                     fetchFolder(iter, callback);
 201                 }
 202
 203                 @Override
 204                 public void onError(Throwable t) {
 205                     GWT.log("Error getting folder", t);
 206                     if (t instanceof RestException)
 207                         app.displayError("Error getting folder: " + ((RestException) t).getHttpStatusText());
 208                     else
 209                         app.displayError("System error fetching folder: " + t.getMessage());
 210                 }
 211             };
 212             getFolder.setHeader("X-Auth-Token", app.getToken());
 213             Scheduler.get().scheduleDeferred(getFolder);
 214         }
 215         else if (callback != null)
 216             callback.execute();
 217     }
 218
 219     public Folder getSelection() {
 220         return selectionModel.getSelectedObject();
 221     }
 222
 223     public void updateFolder(Folder folder, boolean showfiles) {
 224         if (dataProviderMap.get(folder) == null) {
 225             dataProviderMap.put(folder, new ListDataProvider<Folder>());
 226         }
 227         final ListDataProvider<Folder> dataProvider = dataProviderMap.get(folder);
 228         fetchFolder(folder, dataProvider, showfiles);
 229     }
 230
 231     public void fetchFolder(final Folder f, final ListDataProvider<Folder> dataProvider, final boolean showfiles) {
 232         String path = "/" + f.getContainer() + "?format=json&delimiter=/&prefix=" + f.getPrefix();
 233         GetRequest<Folder> getFolder = new GetRequest<Folder>(Folder.class, app.getApiPath(), app.getUsername(), path, f) {
 234             @Override
 235             public void onSuccess(final Folder result) {
 236                 if (showfiles)
 237                     app.showFiles(result);
 238                 Iterator<Folder> iter = result.getSubfolders().iterator();
 239                 fetchFolder(iter, new Command() {
 240                     @Override
 241                     public void execute() {
 242                         dataProvider.getList().clear();
 243                         dataProvider.getList().addAll(result.getSubfolders());
 244                         app.getMySharedTreeView().updateChildren(f);
 245                     }
 246                 });
 247             }
 248
 249             @Override
 250             public void onError(Throwable t) {
 251                 GWT.log("Error getting folder", t);
 252                 if (t instanceof RestException)
 253                     app.displayError("Error getting folder: " + ((RestException) t).getHttpStatusText());
 254                 else
 255                     app.displayError("System error fetching folder: " + t.getMessage());
 256             }
 257         };
 258         getFolder.setHeader("X-Auth-Token", app.getToken());
 259         Scheduler.get().scheduleDeferred(getFolder);
 260     }
 261 }