war/src/main/java/pnews/servlet/HTML.java

   1 package pnews.servlet;
   2
   3 import java.io.IOException;
   4 import java.io.UnsupportedEncodingException;
   5 import java.net.URLEncoder;
   6 import java.util.List;
   7 import java.util.logging.Level;
   8 import java.util.logging.Logger;
   9
  10 import com.rometools.rome.io.FeedException;
  11
  12 import pnews.Article;
  13 import pnews.Category;
  14 import pnews.EntityStat;
  15 import pnews.Language;
  16
  17 public class HTML {
  18         private static final String CLASS_NAME= HTML.class.getName();
  19         private static final Logger LOG = Logger.getLogger(CLASS_NAME);
  20
  21         private static void appendA(StringBuffer buf, String child, String href, String cl) {
  22                 buf.append("<a href='");
  23                 buf.append(href);
  24                 buf.append("'");
  25                 if (cl != null) {
  26                         buf.append(" class='");
  27                         buf.append(cl);
  28                         buf.append('\'');
  29                 }
  30                 buf.append('>');
  31                 buf.append(child);
  32                 buf.append("</a>");
  33         }
  34
  35         private static void appendDiv(StringBuffer buf, String child) {
  36                 buf.append("<div>");
  37                 buf.append(child);
  38                 buf.append("</div>\n");
  39         }
  40
  41         private static void appendP(StringBuffer buf, String child) {
  42                 buf.append("<p>");
  43                 buf.append(child);
  44                 buf.append("</p>\n");
  45         }
  46
  47         private static void append(StringBuffer buf, Article a) throws UnsupportedEncodingException {
  48                 buf.append("<div class='article'>\n");
  49
  50                 buf.append("<div class='article-image'>\n");
  51                 if (a.thumbnail != null) {
  52                         buf.append("<img class='left' src='");
  53                         buf.append(a.thumbnail);
  54                         buf.append("'/>\n");
  55                 }
  56                 buf.append("</div>\n");
  57
  58                 buf.append("<div class='article-content'>\n");
  59
  60                 buf.append("<div class='article-title'>\n");
  61                 appendA(buf, a.title, "/redirect?url=" + URLEncoder.encode(a.link, "UTF-8"), null);
  62                 buf.append("</div>\n");
  63
  64                 buf.append("<div class='article-info'>" + a.website + " - " + a.publicationDate + "</div>");
  65
  66                 buf.append("<div class='article-description'>\n");
  67                 if (a.description != null) {
  68                         buf.append("<p>");
  69                         if (a.description.length() < 512) {
  70                                 buf.append(a.description);
  71                         } else {
  72                                 buf.append(a.description.substring(0, 512));
  73                                 buf.append("[..]");
  74                         }
  75                         buf.append("</p>");
  76                 }
  77                 buf.append("</div>\n");
  78
  79                 buf.append("</div>\n");
  80
  81                 buf.append("</div>\n");
  82         }
  83
  84         private static void appendMenu(StringBuffer buf, Category catActive, Config cfg) {
  85                 String cl;
  86
  87                 buf.append("<nav>\n");
  88                 buf.append("<ul>\n");
  89
  90                 for (Category cat: cfg.getCategories()) {
  91                         if (!cat.getLanguage().equals(catActive.getLanguage()))
  92                                 continue;
  93
  94                         buf.append("<li>");
  95
  96                         if (cat.equals(catActive))
  97                                 cl = "active";
  98                         else
  99                                 cl = null;
 100
 101                         appendA(buf, cat.getLabel(), cat.getURL(), cl);
 102                         buf.append("</li>");
 103                 }
 104
 105                 for (Language l: cfg.getLanguages())
 106                         buf.append("<li><a href='" + l.toURL() + "'>" + l.getLabel() + "</a></li>");
 107
 108                 buf.append("</ul>\n");
 109
 110                 buf.append("</nav>\n");
 111         }
 112
 113         private static String toURL(Category catActive, String entity) {
 114                 try {
 115                         return catActive.getURL() + "?entity=" + URLEncoder.encode(entity, "UTF-8");
 116                 } catch (UnsupportedEncodingException e) {
 117                         LOG.log(Level.SEVERE, "Failed to generate link to entity " + entity, e);
 118                         return catActive.getURL();
 119                 }
 120         }
 121
 122         public static String toHTML(List<Article> articles, Category catActive, String entityActive, Config cfg, ArticleProvider provider) {
 123                 StringBuffer buf;
 124                 int i;
 125                 List<EntityStat> entities;
 126                 String cl;
 127
 128                 buf = new StringBuffer();
 129                 buf.append("<!DOCTYPE html>\n");
 130                 buf.append("<html lang='fr'>\n");
 131                 buf.append("<head>\n");
 132                 buf.append("<meta charset=\"UTF-8\">\n");
 133                 buf.append("<link rel='stylesheet' href='/style.css' />\n");
 134                 buf.append("<title>");
 135                 buf.append(catActive.getTitle());
 136                 buf.append(" - PNews</title>\n");
 137                 buf.append("</head>\n");
 138                 buf.append("<body>\n");
 139
 140                 appendMenu(buf, catActive, cfg);
 141
 142                 try {
 143                         entities = provider.getEntityStats(catActive);
 144
 145                         if (entities.size() > 0) {
 146                                 buf.append("<nav>");
 147                                 buf.append("<ul>");
 148                                 i = 0;
 149                                 for (EntityStat s: entities) {
 150                                         buf.append("<li>");
 151                                         if (entityActive != null && s.getEntity().equals(entityActive))
 152                                                 cl = "active";
 153                                         else
 154                                                 cl = null;
 155                                         appendA(buf, s.getEntity(), toURL(catActive, s.getEntity()), cl);
 156                                         buf.append("</li>\n");
 157                                         i++;
 158                                         if (i > 10)
 159                                                 break;
 160                                 }
 161                                 buf.append("</ul>\n");
 162                                 buf.append("</nav>\n");
 163                         }
 164                 } catch (IllegalArgumentException | FeedException | IOException e2) {
 165                         LOG.log(Level.SEVERE, "Failed to get entities", e2);
 166                 }
 167
 168                 i = 0;
 169                 for (Article e: articles) {
 170                         try {
 171                                 append(buf, e);
 172                         } catch (UnsupportedEncodingException e1) {
 173                                 LOG.log(Level.SEVERE, "Failed to convert article to HTML", e1);
 174                         }
 175                         if (i == 100)
 176                                 break;
 177                         else
 178                                 i++;
 179                 }
 180
 181                 buf.append("</body>\n");
 182                 buf.append("</html>\n");
 183
 184                 return buf.toString();
 185         }
 186 }