source: AnnotationManagerN4J/src/main/java/de/mpiwg/itgroup/annotations/restlet/annotations_ui/GroupResource.java @ 70:2b1e6df5e21a

Last change on this file since 70:2b1e6df5e21a was 70:2b1e6df5e21a, checked in by casties, 10 years ago

added lgpl_v3 license information.
File size: 6.8 KB
Line 
1/**
2 *
3 */
4package de.mpiwg.itgroup.annotations.restlet.annotations_ui;
5
6/*
7 * #%L
8 * AnnotationManager
9 * %%
10 * Copyright (C) 2012 - 2014 MPIWG Berlin
11 * %%
12 * This program is free software: you can redistribute it and/or modify
13 * it under the terms of the GNU Lesser General Public License as
14 * published by the Free Software Foundation, either version 3 of the
15 * License, or (at your option) any later version.
16 *
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
20 * GNU General Lesser Public License for more details.
21 *
22 * You should have received a copy of the GNU General Lesser Public
23 * License along with this program.  If not, see
24 * <http://www.gnu.org/licenses/lgpl-3.0.html>.
25 * #L%
26 */
27
28import java.io.UnsupportedEncodingException;
29import java.net.URLDecoder;
30
31import org.apache.log4j.Logger;
32import org.restlet.data.Form;
33import org.restlet.data.MediaType;
34import org.restlet.data.Reference;
35import org.restlet.data.Status;
36import org.restlet.representation.Representation;
37import org.restlet.representation.StringRepresentation;
38import org.restlet.resource.Delete;
39import org.restlet.resource.Get;
40import org.restlet.resource.Put;
41import org.restlet.resource.ResourceException;
42import org.restlet.resource.ServerResource;
43
44import de.mpiwg.itgroup.annotations.Group;
45import de.mpiwg.itgroup.annotations.neo4j.AnnotationStore;
46import de.mpiwg.itgroup.annotations.restlet.BaseRestlet;
47
48/**
49 * Resource class for a single group.
50 *
51 * @author casties
52 *
53 */
54public class GroupResource extends ServerResource {
55
56    public static Logger logger = Logger.getLogger(GroupResource.class);
57
58    protected AnnotationStore store;
59
60    protected String requestId;
61
62    protected Group group;
63
64    @Override
65    protected void doInit() throws ResourceException {
66        super.doInit();
67        // id from URI /annotations/groups/{id}
68        requestId = (String) getRequest().getAttributes().get("id");
69        logger.debug("group-id=" + requestId);
70        // get store instance
71        if (store == null) {
72            store = ((BaseRestlet) getApplication()).getAnnotationStore();
73        }
74        // get group from store
75        if (requestId != null) {
76            // URL decode
77            try {
78                requestId = URLDecoder.decode(requestId, "UTF-8");
79            } catch (UnsupportedEncodingException e) {
80                // this shouldn't happen
81            }
82            group = (Group) store.getActor(new Group(requestId));
83        }
84    }
85
86    /**
87     * GET with HTML content type. Shows the group.
88     *
89     * @param entity
90     * @return
91     */
92    @Get("html")
93    public Representation doGetHTML(Representation entity) {
94        if (group == null) {
95            // invalid id
96            setStatus(Status.CLIENT_ERROR_NOT_FOUND);
97            return null;
98        }
99        String result = null;
100        // get form parameter
101        Form f = this.getQuery();
102        String form = f.getFirstValue("form");
103        if (form != null && form.equals("edit")) {
104            // output edit form
105            result = "<html><body>\n";
106            result += String.format("<h1>Edit group %s</h1>\n", group.getId());
107            result += String.format("<p><a href=\"%s\">All groups</a></p>", this.getReference().getParentRef());
108            // tunnel PUT method through POST
109            result += String.format("<form method=\"post\" action=\"%s?method=PUT\">\n", this.getReference().getHierarchicalPart());
110            result += "<table>";
111            result += String.format("<tr><td><b>name</b></td><td><input type=\"text\" name=\"name\" value=\"%s\"/></td></tr>\n",
112                    group.getName());
113            result += String.format("<tr><td><b>uri</b></td><td><input type=\"text\" name=\"uri\" value=\"%s\"/></td></tr>\n",
114                    group.getUriString());
115            result += "</table>\n";
116            result += "<p><input type=\"submit\"/></p>";
117            result += "</table>\n</form>\n</body>\n</html>";
118        } else {
119            // output group content
120            result = "<html><body>\n<h1>Group</h1>\n";
121            result += String.format("<p><a href=\"%s\">All groups</a></p>", this.getReference().getParentRef());
122            result += "<table>";
123            result += String.format("<tr><td><b>id</b></td><td>%s</td></tr>\n", group.getId());
124            result += String.format("<tr><td><b>name</b></td><td>%s</td></tr>\n", group.getName());
125            result += String.format("<tr><td><b>uri</b></td><td>%s</td></tr>\n", group.getUri());
126            result += String.format("<tr><td><b>members</b></td><td><a href=\"%s\">view members</a></td></tr>\n", this
127                    .getReference().addSegment("members"));
128            result += "</table>\n";
129            result += "<p><a href=\"?form=edit\">Edit group</a></p>\n";
130            // tunnel POST as DELETE
131            result += String.format(
132                    "<form method=\"post\" action=\"%s?method=DELETE\"><input type=\"submit\" value=\"Delete group\"/></form>\n",
133                    this.getReference().getHierarchicalPart());
134            result += "</body>\n</html>";
135        }
136        return new StringRepresentation(result, MediaType.TEXT_HTML);
137    }
138
139    /**
140     * PUT updates the group.
141     *
142     * @param entity
143     * @return
144     */
145    @Put
146    public Representation doPut(Representation entity) {
147        logger.debug("GroupResource.doPut!");
148        if (group == null) {
149            // invalid id
150            setStatus(Status.CLIENT_ERROR_BAD_REQUEST);
151            return null;
152        }
153        // TODO: do authentication
154        Form form = new Form(entity);
155        String name = form.getFirstValue("name");
156        String uri = form.getFirstValue("uri");
157        if (name != null && !name.isEmpty()) {
158            group.setName(name);
159        }
160        if (uri != null && !uri.isEmpty()) {
161            group.setUri(uri);
162        }
163        store.storeActor(group);
164        // return 303: see other
165        setStatus(Status.REDIRECTION_SEE_OTHER);
166        // go GET same URL
167        Reference url = this.getReference();
168        this.getResponse().setLocationRef(url);
169        return null;
170    }
171
172    /**
173     * DELETE deletes the group.
174     *
175     * @param entity
176     * @return
177     */
178    @Delete
179    public Representation doDelete(Representation entity) {
180        logger.debug("GroupResource.doDelete!");
181        if (group == null) {
182            // invalid id
183            setStatus(Status.CLIENT_ERROR_BAD_REQUEST);
184            return null;
185        }
186        // TODO: do authentication
187        store.deleteActor(group);
188        // return 303: see other
189        setStatus(Status.REDIRECTION_SEE_OTHER);
190        // go GET parent URL
191        Reference url = this.getReference().getParentRef();
192        this.getResponse().setLocationRef(url);
193        return null;
194    }
195}
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