src/be/nikiroo/gofetch/support/LWN.java

   1 package be.nikiroo.gofetch.support;
   2
   3 import java.io.IOException;
   4 import java.io.InputStream;
   5 import java.net.URL;
   6 import java.util.ArrayList;
   7 import java.util.List;
   8
   9 import org.jsoup.helper.DataUtil;
  10 import org.jsoup.nodes.Document;
  11 import org.jsoup.nodes.Element;
  12 import org.jsoup.nodes.Node;
  13 import org.jsoup.select.Elements;
  14
  15 import be.nikiroo.gofetch.data.Comment;
  16 import be.nikiroo.gofetch.data.Story;
  17
  18 /**
  19  * Support <a href='https://lwn.net/'>https://lwn.net/</a>.
  20  *
  21  * @author niki
  22  */
  23 public class LWN extends BasicSupport {
  24         @Override
  25         public String getDescription() {
  26                 return "LWN: Linux Weekly Newsletter";
  27         }
  28
  29         @Override
  30         public List<Story> list() throws IOException {
  31                 List<Story> list = new ArrayList<Story>();
  32
  33                 URL url = new URL("https://lwn.net/");
  34                 InputStream in = open(url);
  35                 Document doc = DataUtil.load(in, "UTF-8", url.toString());
  36                 Elements stories = doc.getElementsByClass("pure-u-1");
  37                 for (Element story : stories) {
  38                         Elements titles = story.getElementsByClass("Headline");
  39                         Elements listings = story.getElementsByClass("BlurbListing");
  40                         if (titles.size() == 0) {
  41                                 continue;
  42                         }
  43                         if (listings.size() == 0) {
  44                                 continue;
  45                         }
  46
  47                         Element listing = listings.get(0);
  48                         if (listing.children().size() < 2) {
  49                                 continue;
  50                         }
  51
  52                         String title = titles.get(0).text();
  53                         String details = listing.children().get(0).text();
  54                         String body = "";
  55                         // All but the first and two last children
  56                         for (int i = 1; i < listing.children().size() - 2; i++) {
  57                                 Element e = listing.children().get(i);
  58                                 body = body.trim() + " " + e.text().trim();
  59                         }
  60                         body = body.trim();
  61
  62                         String author = "";
  63                         int pos = details.indexOf(" by ");
  64                         if (pos >= 0) {
  65                                 author = details.substring(pos + " by ".length()).trim();
  66                         }
  67
  68                         String date = "";
  69                         pos = details.indexOf(" Posted ");
  70                         if (pos >= 0) {
  71                                 date = details.substring(pos + " Posted ".length()).trim();
  72                         }
  73
  74                         String id = "";
  75                         String intUrl = "";
  76                         String extUrl = "";
  77                         for (Element idElem : story.getElementsByTag("a")) {
  78                                 // Last link is the story link
  79                                 intUrl = idElem.absUrl("href");
  80                                 pos = intUrl.indexOf("#Comments");
  81                                 if (pos >= 0) {
  82                                         intUrl = intUrl.substring(0, pos - 1);
  83                                 }
  84                                 id = intUrl.replaceAll("[^0-9]", "");
  85                         }
  86
  87                         list.add(new Story(getType(), id, title, details, intUrl, extUrl,
  88                                         body));
  89                 }
  90
  91                 return list;
  92         }
  93
  94         @Override
  95         public void fetch(Story story) throws IOException {
  96                 List<Comment> comments = new ArrayList<Comment>();
  97                 String fullContent = story.getContent();
  98
  99                 // Do not try the paid-for stories...
 100                 if (!story.getTitle().startsWith("[$]")) {
 101                         URL url = new URL(story.getUrlInternal());
 102                         InputStream in = open(url);
 103                         Document doc = DataUtil.load(in, "UTF-8", url.toString());
 104                         Elements fullContentElements = doc
 105                                         .getElementsByClass("ArticleText");
 106                         if (fullContentElements.size() > 0) {
 107                                 // comments.addAll(getComments(listing.get(0)));
 108                                 fullContent = fullContentElements.get(0).text();
 109                         }
 110
 111                         Elements listing = doc.getElementsByClass("lwn-u-1");
 112                         if (listing.size() > 0) {
 113                                 comments.addAll(getComments(listing.get(0)));
 114                         }
 115                 } else {
 116                         fullContent = "[$] Sorry, this article is currently available to LWN suscribers only [https://lwn.net/subscribe/].";
 117                 }
 118
 119                 story.setFullContent(fullContent);
 120                 story.setComments(comments);
 121         }
 122
 123         private List<Comment> getComments(Element listing) {
 124                 List<Comment> comments = new ArrayList<Comment>();
 125                 for (Element commentElement : listing.children()) {
 126                         if (commentElement.hasClass("CommentBox")) {
 127                                 Comment comment = getComment(commentElement);
 128                                 if (!comment.isEmpty()) {
 129                                         comments.add(comment);
 130                                 }
 131                         } else if (commentElement.hasClass("Comment")) {
 132                                 if (comments.size() > 0) {
 133                                         comments.get(comments.size() - 1).addAll(
 134                                                         getComments(commentElement));
 135                                 }
 136                         }
 137                 }
 138                 return comments;
 139         }
 140
 141         private Comment getComment(Element commentElement) {
 142                 String title = firstOrEmpty(commentElement, "CommentTitle").text();
 143                 String author = firstOrEmpty(commentElement, "CommentPoster").text();
 144
 145                 String date = "";
 146                 int pos = author.lastIndexOf(" by ");
 147                 if (pos >= 0) {
 148                         date = author.substring(0, pos).trim();
 149                         author = author.substring(pos + " by ".length()).trim();
 150
 151                         if (author.startsWith("Posted ")) {
 152                                 author = author.substring("Posted ".length()).trim();
 153                         }
 154                 }
 155
 156                 Element content = null;
 157                 Elements commentBodyElements = commentElement
 158                                 .getElementsByClass("CommentBody");
 159                 if (commentBodyElements.size() > 0) {
 160                         content = commentBodyElements.get(0);
 161                 }
 162
 163                 Comment comment = new Comment(commentElement.id(), author, title, date,
 164                                 toLines(content));
 165
 166                 return comment;
 167         }
 168
 169         private List<String> toLines(Element element) {
 170                 return toLines(element, new QuoteProcessor() {
 171                         @Override
 172                         public String processText(String text) {
 173                                 while (text.startsWith(">")) { // comments
 174                                         text = text.substring(1).trim();
 175                                 }
 176
 177                                 return text;
 178                         }
 179
 180                         @Override
 181                         public boolean detectQuote(Node node) {
 182                                 if (node instanceof Element) {
 183                                         Element elementNode = (Element) node;
 184                                         if (elementNode.tagName().equals("blockquote")
 185                                                         || elementNode.hasClass("QuotedText")) {
 186                                                 return true;
 187                                         }
 188                                 }
 189
 190                                 return false;
 191                         }
 192
 193                         @Override
 194                         public boolean ignoreNode(Node node) {
 195                                 if (node instanceof Element) {
 196                                         Element elementNode = (Element) node;
 197                                         if (elementNode.hasClass("CommentPoster")) {
 198                                                 return true;
 199                                         }
 200                                 }
 201
 202                                 return false;
 203                         }
 204                 });
 205         }
 206 }