Finished tag tree display (without optimizations)
[pithos] / web_client / src / gr / grnet / pithos / web / client / tagtree / TagTreeViewModel.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.tagtree;
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.core.client.GWT;
42 import com.google.gwt.core.client.Scheduler;
43 import com.google.gwt.core.client.Scheduler.ScheduledCommand;
44 import com.google.gwt.event.dom.client.ContextMenuEvent;
45 import com.google.gwt.safehtml.shared.SafeHtml;
46 import com.google.gwt.safehtml.shared.SafeHtmlBuilder;
47 import com.google.gwt.text.shared.SafeHtmlRenderer;
48 import com.google.gwt.user.client.ui.AbstractImagePrototype;
49 import com.google.gwt.view.client.ListDataProvider;
50 import com.google.gwt.view.client.SingleSelectionModel;
51 import com.google.gwt.view.client.TreeViewModel;
52 import gr.grnet.pithos.web.client.Pithos;
53 import gr.grnet.pithos.web.client.foldertree.AccountResource;
54 import gr.grnet.pithos.web.client.foldertree.File;
55 import gr.grnet.pithos.web.client.foldertree.Folder;
56 import gr.grnet.pithos.web.client.rest.GetRequest;
57 import gr.grnet.pithos.web.client.rest.RestException;
58 import gr.grnet.pithos.web.client.tagtree.TagTreeView.Templates;
59 import java.util.ArrayList;
60 import java.util.Arrays;
61 import java.util.Iterator;
62 import java.util.LinkedHashSet;
63 import java.util.List;
64 import java.util.Set;
65
66 public class TagTreeViewModel implements TreeViewModel {
67
68     private Cell<Tag> tagCell = new AbstractCell<Tag>(ContextMenuEvent.getType().getName()) {
69
70        @Override
71         public void render(Context context, Tag tag, SafeHtmlBuilder safeHtmlBuilder) {
72             String html = AbstractImagePrototype.create(TagTreeView.images.tag()).getHTML();
73             safeHtmlBuilder.appendHtmlConstant(html);
74             safeHtmlBuilder.append(Templates.INSTANCE.nameSpan(tag.getName()));
75         }
76
77         @Override
78         public void onBrowserEvent(Context context, com.google.gwt.dom.client.Element parent, Tag tag, com.google.gwt.dom.client.NativeEvent event, com.google.gwt.cell.client.ValueUpdater<Tag> valueUpdater) {
79             if (event.getType().equals(com.google.gwt.event.dom.client.ContextMenuEvent.getType().getName())) {
80                 TagTreeViewModel.this.selectionModel.setSelected(tag, true);
81             }
82         }
83     };
84
85     private ListDataProvider<String> rootDataProvider = new ListDataProvider<String>();
86     private ListDataProvider<Tag> tagDataProvider = new ListDataProvider<Tag>();
87
88     private SingleSelectionModel<Tag> selectionModel;
89
90     public TagTreeViewModel(SingleSelectionModel<Tag> selectionModel) {
91         this.selectionModel = selectionModel;
92     }
93
94     @Override
95     public <T> NodeInfo<?> getNodeInfo(T value) {
96         if (value == null) {
97             return new DefaultNodeInfo<String>(rootDataProvider, new TextCell(new SafeHtmlRenderer<String>() {
98                 @Override
99                 public SafeHtml render(String object) {
100                     SafeHtmlBuilder builder = new SafeHtmlBuilder();
101                     render(object, builder);
102                     return builder.toSafeHtml();
103                 }
104
105                 @Override
106                 public void render(String object, SafeHtmlBuilder builder) {
107                     String html = AbstractImagePrototype.create(TagTreeView.images.tag()).getHTML();
108                     builder.appendHtmlConstant(html);
109                     builder.append(Templates.INSTANCE.nameSpan(object));
110                 }
111             }), null, null);
112         }
113         else if (value instanceof String) {
114             //fetchAllTags();
115             return new DefaultNodeInfo<Tag>(tagDataProvider, tagCell, selectionModel, null);
116         }
117         else
118             return null;
119     }
120
121     @Override
122     public boolean isLeaf(Object o) {
123         if (o == null)
124             return false;
125         if (o instanceof String)
126             return tagDataProvider.getList().isEmpty();
127         else
128             return true;
129     }
130
131     private void fetchTags(final Iterator<Folder> iter) {
132         final Pithos app = Pithos.get();
133         if (iter.hasNext()) {
134             final Folder f = iter.next();
135
136             String path = app.getApiPath() + app.getUsername() + "/" + f.getUri() + "?format=json&delimiter=/&prefix=" + f.getPrefix();
137 //            GetRequest<Tag> getFolder = new GetRequest<Tag>(Tag.class, path, f) {
138 //                @Override
139 //                public void onSuccess(Tag result) {
140 //                    fetchFolder(iter, dataProvider, tags);
141 //                }
142 //
143 //                @Override
144 //                public void onError(Throwable t) {
145 //                    GWT.log("Error getting folder", t);
146 //                    if (t instanceof RestException)
147 //                        Pithos.get().displayError("Error getting folder: " + ((RestException) t).getHttpStatusText());
148 //                    else
149 //                        Pithos.get().displayError("System error fetching folder: " + t.getMessage());
150 //                }
151 //            };
152 //            getFolder.setHeader("X-Auth-Token", app.getToken());
153 //            Scheduler.get().scheduleDeferred(getFolder);
154         }
155     }
156 //
157 //    public void initialize(AccountResource account) {
158 //        Iterator<Tag> iter = account.getContainers().iterator();
159 //        fetchFolder(iter, rootDataProvider, account.getContainers());
160 //    }
161 //
162     public Tag getSelection() {
163         return selectionModel.getSelectedObject();
164     }
165
166     public void updateTag(Tag tag) {
167         fetchTag(tag);
168     }
169
170     public void fetchTag(Tag t) {
171         Pithos app = Pithos.get();
172         AccountResource account = app.getAccount();
173         Iterator<Folder> iter = account.getContainers().iterator();
174         fetchTag(iter, t, new LinkedHashSet<File>());
175     }
176
177     private void fetchTag(final Iterator<Folder> iter, final Tag t, final Set<File> files) {
178         final Pithos app = Pithos.get();
179         if (iter.hasNext()) {
180             Folder f = iter.next();
181             String path = app.getApiPath() + app.getUsername() + f.getUri() + "?format=json&meta=" + t.getName();
182             GetRequest<Folder> getFolder = new GetRequest<Folder>(Folder.class, path) {
183                 @Override
184                 public void onSuccess(Folder result) {
185                     files.addAll(result.getFiles());
186                     fetchTag(iter, t, files);
187                 }
188
189                 @Override
190                 public void onError(Throwable t) {
191                     GWT.log("Error getting folder", t);
192                     if (t instanceof RestException)
193                         Pithos.get().displayError("Error getting folder: " + ((RestException) t).getHttpStatusText());
194                     else
195                         Pithos.get().displayError("System error fetching folder: " + t.getMessage());
196                 }
197             };
198             getFolder.setHeader("X-Auth-Token", app.getToken());
199             Scheduler.get().scheduleDeferred(getFolder);
200         }
201         else {
202             app.showFiles(files);
203         }
204     }
205
206     public void initialize(AccountResource account) {
207         List<Tag> tagList = tagDataProvider.getList();
208         for (Folder f : account.getContainers()) {
209             for (String t : f.getTags())
210                 tagList.add(new Tag(t));
211         }
212         rootDataProvider.getList().add("Tags");
213     }
214 }