1   /**
2    * Copyright (c) 2000-2008 Liferay, Inc. All rights reserved.
3    *
4    * Permission is hereby granted, free of charge, to any person obtaining a copy
5    * of this software and associated documentation files (the "Software"), to deal
6    * in the Software without restriction, including without limitation the rights
7    * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
8    * copies of the Software, and to permit persons to whom the Software is
9    * furnished to do so, subject to the following conditions:
10   *
11   * The above copyright notice and this permission notice shall be included in
12   * all copies or substantial portions of the Software.
13   *
14   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15   * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16   * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
17   * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
18   * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
19   * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
20   * SOFTWARE.
21   */
22  
23  package com.liferay.portlet.messageboards.action;
24  
25  import com.liferay.portal.kernel.dao.search.SearchContainer;
26  import com.liferay.portal.kernel.util.ContentTypes;
27  import com.liferay.portal.kernel.util.ParamUtil;
28  import com.liferay.portal.kernel.util.StringPool;
29  import com.liferay.portal.struts.ActionConstants;
30  import com.liferay.portal.theme.ThemeDisplay;
31  import com.liferay.portal.util.WebKeys;
32  import com.liferay.portlet.messageboards.NoSuchCategoryException;
33  import com.liferay.portlet.messageboards.service.MBMessageServiceUtil;
34  import com.liferay.util.RSSUtil;
35  import com.liferay.util.servlet.ServletResponseUtil;
36  
37  import javax.servlet.http.HttpServletRequest;
38  import javax.servlet.http.HttpServletResponse;
39  import javax.servlet.jsp.PageContext;
40  
41  import org.apache.commons.logging.Log;
42  import org.apache.commons.logging.LogFactory;
43  import org.apache.struts.action.Action;
44  import org.apache.struts.action.ActionForm;
45  import org.apache.struts.action.ActionForward;
46  import org.apache.struts.action.ActionMapping;
47  
48  /**
49   * <a href="RSSAction.java.html"><b><i>View Source</i></b></a>
50   *
51   * @author Brian Wing Shun Chan
52   *
53   */
54  public class RSSAction extends Action {
55  
56      public ActionForward execute(
57              ActionMapping mapping, ActionForm form, HttpServletRequest req,
58              HttpServletResponse res)
59          throws Exception {
60  
61          try {
62              ServletResponseUtil.sendFile(
63                  res, null, getRSS(req), ContentTypes.TEXT_XML_UTF8);
64  
65              return null;
66          }
67          catch (Exception e) {
68              req.setAttribute(PageContext.EXCEPTION, e);
69  
70              return mapping.findForward(ActionConstants.COMMON_ERROR);
71          }
72      }
73  
74      protected byte[] getRSS(HttpServletRequest req) throws Exception {
75          ThemeDisplay themeDisplay =
76              (ThemeDisplay)req.getAttribute(WebKeys.THEME_DISPLAY);
77  
78          String plid = ParamUtil.getString(req, "p_l_id");
79          long companyId = ParamUtil.getLong(req, "companyId");
80          long groupId = ParamUtil.getLong(req, "groupId");
81          long userId = ParamUtil.getLong(req, "userId");
82          long categoryId = ParamUtil.getLong(req, "categoryId");
83          long threadId = ParamUtil.getLong(req, "threadId");
84          int max = ParamUtil.getInteger(
85              req, "max", SearchContainer.DEFAULT_DELTA);
86          String type = ParamUtil.getString(req, "type", RSSUtil.DEFAULT_TYPE);
87          double version = ParamUtil.getDouble(
88              req, "version", RSSUtil.DEFAULT_VERSION);
89          String displayStyle = ParamUtil.getString(
90              req, "displayStyle", RSSUtil.DISPLAY_STYLE_FULL_CONTENT);
91  
92          String entryURL =
93              themeDisplay.getURLPortal() + themeDisplay.getPathMain() +
94                  "/message_boards/find_message?p_l_id=" + plid;
95  
96          String rss = StringPool.BLANK;
97  
98          if (companyId > 0) {
99              String feedURL = StringPool.BLANK;
100 
101             rss = MBMessageServiceUtil.getCompanyMessagesRSS(
102                 companyId, max, type, version, displayStyle, feedURL, entryURL);
103         }
104         else if (groupId > 0) {
105             String feedURL =
106                 themeDisplay.getURLPortal() + themeDisplay.getPathMain() +
107                     "/message_boards/find_recent_posts?p_l_id=" + plid;
108 
109             if (userId > 0) {
110                 rss = MBMessageServiceUtil.getGroupMessagesRSS(
111                     groupId, userId, max, type, version, displayStyle, feedURL,
112                     entryURL);
113             }
114             else {
115                 rss = MBMessageServiceUtil.getGroupMessagesRSS(
116                     groupId, max, type, version, displayStyle, feedURL,
117                     entryURL);
118             }
119         }
120         else if (categoryId > 0) {
121             String feedURL =
122                 themeDisplay.getURLPortal() + themeDisplay.getPathMain() +
123                     "/message_boards/find_category?p_l_id=" + plid +
124                         "&categoryId=" + categoryId;
125 
126             try {
127                 rss = MBMessageServiceUtil.getCategoryMessagesRSS(
128                     categoryId, max, type, version, displayStyle, feedURL,
129                     entryURL);
130             }
131             catch (NoSuchCategoryException nsce) {
132                 if (_log.isWarnEnabled()) {
133                     _log.warn(nsce);
134                 }
135             }
136         }
137         else if (threadId > 0) {
138             String feedURL =
139                 themeDisplay.getURLPortal() + themeDisplay.getPathMain() +
140                     "/message_boards/find_thread?p_l_id=" + plid +
141                         "&threadId=" + threadId;
142 
143             rss = MBMessageServiceUtil.getThreadMessagesRSS(
144                 threadId, max, type, version, displayStyle, feedURL, entryURL);
145         }
146 
147         return rss.getBytes(StringPool.UTF8);
148     }
149 
150     private static Log _log = LogFactory.getLog(RSSAction.class);
151 
152 }