src/main/java/net/wpitchoune/asciidoctor/Main.java

   1 package net.wpitchoune.asciidoctor;
   2 /*
   3  * Copyright (C) 2016 jeanfi@gmail.com
   4  *
   5  * This program is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU General Public License as
   7  * published by the Free Software Foundation; either version 2 of the
   8  * License, or (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  18  * 02110-1301 USA
  19  */
  20
  21 import java.io.File;
  22 import java.io.FileInputStream;
  23 import java.io.FileNotFoundException;
  24 import java.io.FileReader;
  25 import java.io.FileWriter;
  26 import java.io.IOException;
  27 import java.io.InputStream;
  28 import java.io.StringWriter;
  29 import java.nio.charset.StandardCharsets;
  30 import java.nio.file.Files;
  31 import java.util.ArrayList;
  32 import java.util.HashMap;
  33 import java.util.Properties;
  34 import java.util.logging.Logger;
  35
  36 import org.asciidoctor.Asciidoctor;
  37 import org.asciidoctor.Asciidoctor.Factory;
  38 import org.asciidoctor.ast.DocumentHeader;
  39
  40 import com.rometools.rome.feed.synd.SyndContentImpl;
  41 import com.rometools.rome.feed.synd.SyndEntry;
  42 import com.rometools.rome.feed.synd.SyndEntryImpl;
  43 import com.rometools.rome.feed.synd.SyndFeed;
  44 import com.rometools.rome.feed.synd.SyndFeedImpl;
  45 import com.rometools.rome.io.FeedException;
  46 import com.rometools.rome.io.SyndFeedOutput;
  47
  48 /**
  49  * Command line program which generates a feed (RSS v2) and HTML files
  50  * from a set of asciidoctor documents.
  51  *
  52  * @author jeanfi@gmail.com
  53  */
  54 public class Main {
  55         private static final Logger LOG = Logger.getLogger(Main.class.getSimpleName());
  56
  57         private static final Asciidoctor asciidoctor = Factory.create();
  58
  59         private static File toHTMLFile(File dir, File adoc) {
  60                 int idx;
  61                 String name;
  62
  63                 name = adoc.getName();
  64
  65                 idx = name.lastIndexOf('.');
  66
  67                 if (idx >= 0)
  68                         name = name.substring(0, idx);
  69
  70                 return new File(dir, name + ".html");
  71         }
  72
  73         private static SyndContentImpl toSyndContentImpl(String description) {
  74                 SyndContentImpl ret;
  75
  76                 ret = new SyndContentImpl();
  77                 ret.setType("text/html");
  78                 ret.setValue(description);
  79
  80                 return ret;
  81         }
  82
  83         private static void appendHTMLHead(StringBuffer sb, Configuration cfg)
  84                         throws IOException {
  85                 File f;
  86
  87                 f = cfg.getHTMLHeaderFile();
  88                 if (f == null) {
  89                         LOG.info("There is no declared HTML header file.");
  90                         return ;
  91                 }
  92
  93                 sb.append("<!DOCTYPE html>\n");
  94                 sb.append("<html>\n");
  95                 sb.append("<head>\n");
  96                 sb.append(new String(Files.readAllBytes(f.toPath()),
  97                                      StandardCharsets.UTF_8));
  98                 sb.append("</head>\n");
  99         }
 100
 101         private static void appendHTMLFooter(StringBuffer sb) {
 102                 sb.append("</body>\n");
 103                 sb.append("</html>");
 104         }
 105
 106         private static void appendHTMLContentHeader(StringBuffer sb, String title) {
 107                 sb.append("<div id='header'>\n");
 108                 sb.append("<h1>");
 109                 sb.append(title);
 110                 sb.append("</h1>\n");
 111                 sb.append("</div>");
 112         }
 113
 114         private static void generateHTMLFileItem(File file,
 115                                                  String title,
 116                                                  String content,
 117                                                  Configuration cfg) throws IOException {
 118                 StringBuffer buf;
 119
 120                 buf = new StringBuffer();
 121
 122                 appendHTMLHead(buf, cfg);
 123
 124                 buf.append("<body>\n");
 125
 126                 appendHTMLContentHeader(buf, title);
 127
 128                 buf.append("<div id='content'>\n");
 129                 buf.append(content);
 130                 buf.append("</div>");
 131
 132                 appendHTMLFooter(buf);
 133
 134                 Files.write(file.toPath(), buf.toString().getBytes());
 135         }
 136
 137         public static void main(String[] args) throws FileNotFoundException, IOException, FeedException {
 138                 File inDir, html, outDir;
 139                 File[] adocs;
 140                 StringWriter desc;
 141                 SyndFeed feed;
 142                 Configuration cfg;
 143                 ArrayList<SyndEntry> entries;
 144                 SyndEntryImpl e;
 145                 DocumentHeader h;
 146                 SyndContentImpl c;
 147                 StringBuffer news;
 148                 String itemTitle, itemContent, itemURI;
 149
 150                 inDir = new File(args[0]);
 151                 outDir = new File(args[1]);
 152
 153                 cfg = Configuration.load(new File(args[2]));
 154
 155                 adocs = inDir.listFiles();
 156
 157                 feed = new SyndFeedImpl();
 158                 feed.setTitle(cfg.getFeedTitle());
 159                 feed.setDescription(cfg.getFeedDescription());
 160                 feed.setLink(cfg.getFeedLink());
 161
 162                 entries = new ArrayList<SyndEntry>();
 163
 164                 news = new StringBuffer();
 165
 166                 appendHTMLHead(news, cfg);
 167
 168                 news.append("<body>\n");
 169
 170                 appendHTMLContentHeader(news, cfg.getFeedTitle());
 171
 172                 news.append("<div id='content'>\n");
 173
 174                 for (File adoc: adocs) {
 175                         if (!adoc.getName().endsWith(".adoc"))
 176                                 continue;
 177                         desc = new StringWriter();
 178
 179                         html = toHTMLFile(outDir, adoc);
 180
 181                         h = asciidoctor.readDocumentHeader(adoc);
 182
 183                         asciidoctor.convert(new FileReader(adoc), desc, new HashMap<String,Object>());
 184
 185                         itemTitle = h.getDocumentTitle().getMain();
 186                         itemContent = desc.toString();
 187
 188                         e = new SyndEntryImpl();
 189                         e.setTitle(itemTitle);
 190                         itemURI = cfg.getFeedBaseURL() + "/" + html.getName();
 191                         e.setUri(itemURI);
 192                         e.setLink(itemURI);
 193
 194
 195                         c = toSyndContentImpl(itemContent);
 196
 197                         e.setDescription(c);
 198
 199                         entries.add(e);
 200
 201                         news.append("\n<div>");
 202                         news.append("<h2>");
 203                         news.append(itemTitle);
 204                         news.append("</h2>");
 205                         news.append(desc.toString());
 206                         news.append("</div>\n");
 207
 208                         generateHTMLFileItem(html, itemTitle, itemContent, cfg);
 209                 }
 210
 211                 news.append("</div>\n");
 212
 213                 appendHTMLFooter(news);
 214
 215                 feed.setEntries(entries);
 216
 217                 feed.setFeedType("rss_2.0");
 218                 SyndFeedOutput output = new SyndFeedOutput();
 219                 output.output(feed, new File(outDir, "feed.xml"));
 220
 221                 System.out.println(news.toString());
 222                 Files.write(new File(outDir, "news.html").toPath(), news.toString().getBytes());
 223         }
 224 }