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1 package nabble.view.web.forum;
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2
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3 import fschmidt.util.servlet.CanonicalUrl;
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4 import fschmidt.util.servlet.ServletUtils;
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5 import nabble.model.ModelHome;
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6 import nabble.model.Node;
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7 import nabble.model.Person;
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8 import nabble.model.Site;
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9 import nabble.view.lib.Jtp;
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10 import nabble.view.lib.TopicView;
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11 import nabble.view.lib.UrlMappable;
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12
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13 import javax.servlet.ServletException;
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14 import javax.servlet.http.HttpServlet;
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15 import javax.servlet.http.HttpServletRequest;
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16 import javax.servlet.http.HttpServletResponse;
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17 import java.io.IOException;
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18 import java.util.HashMap;
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19 import java.util.Map;
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20 import java.util.regex.Matcher;
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21 import java.util.regex.Pattern;
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22
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23
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24 public class Permalink extends HttpServlet implements UrlMappable, CanonicalUrl {
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25
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26 public static String url(Node topic,Node post) {
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27 if( topic==null )
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28 topic = post.getTopic();
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29 return topic.getSite().getBaseUrl() + path(topic,post);
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30 }
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31
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32 public static String path(Node topic,Node post) {
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33 if( topic==null )
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34 topic = post.getTopic();
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35 StringBuilder buf = new StringBuilder();
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36 buf.append( '/' );
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37 buf.append( Jtp.subjectEncode(topic.getSubject()) );
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38 buf.append( "-tp" );
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39 buf.append( topic.getId() );
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40 if( post != null && post != topic ) {
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41 buf.append("p");
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42 buf.append(post.getId());
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43 }
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44 buf.append( ".html" );
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45 return buf.toString();
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46 }
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47
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48 private static final Pattern URL_PATTERN = Pattern.compile("/([^/]*)-tp(\\d+)(p(\\d+))?(ef(\\d+))?\\.html$");
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49
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50 public String getCanonicalUrl(HttpServletRequest request) {
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51 Site site = Jtp.getSite(request);
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52 if( site == null )
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53 return null;
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54 Node topic = site.getNode( Long.parseLong( request.getParameter("root") ) );
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55 String postS = request.getParameter("post");
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56 Node post = postS==null ? null : site.getNode( Long.parseLong(postS) );
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57 return url(topic,post);
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58 }
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59
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60 public Map<String,String[]> getParameterMapFromUrl(HttpServletRequest request,String mappedUrl) {
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61 Matcher m = URL_PATTERN.matcher(mappedUrl);
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62 if( !m.find() )
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63 throw new RuntimeException();
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64 Map<String,String[]> params = new HashMap<String,String[]>();
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65 String subject = m.group(1);
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66 params.put("subject",new String[]{subject});
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67 String rootId = m.group(2);
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68 params.put("root",new String[]{rootId});
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69 String postId = m.group(4);
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70 if( postId != null )
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71 params.put( "post", new String[]{postId} );
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72 return params;
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73 }
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74
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75 public Pattern getUrlPattern() {
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76 return URL_PATTERN;
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77 }
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78
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79 protected void service(HttpServletRequest request, HttpServletResponse response)
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80 throws ServletException, IOException
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81 {
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82 String type = ServletUtils.getCookieValue(request,"tview");
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83 TopicView topicView = "threaded".equals(type)? TopicView.THREADED
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84 : "list".equals(type)? TopicView.LIST : TopicView.CLASSIC;
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85
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86 long rootId = Long.parseLong( request.getParameter("root") );
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87 Site site = Jtp.getSite(request);
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88 if (site == null) {
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89 response.sendError(HttpServletResponse.SC_NOT_FOUND, "Page Not Found");
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90 return;
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91 }
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92 Node root = site.getNode(rootId);
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93 if (root == null) {
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94 response.sendError(HttpServletResponse.SC_NOT_FOUND, "Node Not Found");
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95 return;
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96 }
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97 Person visitor = Jtp.getVisitor(request, response);
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98
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99 String postIdS = request.getParameter("post");
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100 Node post = postIdS == null? root : site.getNode(Long.parseLong(postIdS));
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101 if (Jtp.canBeViewedBy(root, visitor))
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102 sendToTopicPage(root, post, topicView, response);
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103 else if (post.getOwner().equals(visitor))
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104 response.sendRedirect("/template/NamlServlet.jtp?macro=print_post&node="+post.getId());
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105 else
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106 sendToTopicPage(root, post, topicView, response);
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107 }
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108
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109 private void sendToTopicPage(Node root, Node post, TopicView topicView, HttpServletResponse response) throws IOException {
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110 response.setHeader("Location", Jtp.topicViewPath(root, post.getId(), topicView));
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111 response.sendError(HttpServletResponse.SC_MOVED_PERMANENTLY);
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112 }
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113
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114 public static Node getPostFromUrl(String url) {
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115 Site site = Jtp.getSiteFromUrl(url);
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116 if( site == null )
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117 return null;
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118 Matcher m = URL_PATTERN.matcher(url);
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119 if( !m.find() )
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120 return null;
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121 String post = m.group(4) == null? m.group(2) : m.group(4);
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122 return site.getNode(Long.parseLong(post));
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123 }
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124
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125 }
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