franta-hg@72: /*
franta-hg@72:  *   SONEWS News Server
franta-hg@72:  *   see AUTHORS for the list of contributors
franta-hg@72:  *
franta-hg@72:  *   This program is free software: you can redistribute it and/or modify
franta-hg@72:  *   it under the terms of the GNU General Public License as published by
franta-hg@72:  *   the Free Software Foundation, either version 3 of the License, or
franta-hg@72:  *   (at your option) any later version.
franta-hg@72:  *
franta-hg@72:  *   This program is distributed in the hope that it will be useful,
franta-hg@72:  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
franta-hg@72:  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
franta-hg@72:  *   GNU General Public License for more details.
franta-hg@72:  *
franta-hg@72:  *   You should have received a copy of the GNU General Public License
franta-hg@72:  *   along with this program.  If not, see <http://www.gnu.org/licenses/>.
franta-hg@72:  */
franta-hg@72: package org.sonews.storage;
franta-hg@72: 
franta-hg@75: import java.io.BufferedReader;
franta-hg@102: import java.io.ByteArrayInputStream;
franta-hg@72: import java.io.ByteArrayOutputStream;
franta-hg@72: import java.io.IOException;
franta-hg@75: import java.io.InputStream;
franta-hg@75: import java.io.InputStreamReader;
franta-hg@75: import java.io.PrintStream;
franta-hg@74: import java.io.StringReader;
franta-hg@74: import java.io.StringWriter;
franta-hg@72: import java.io.UnsupportedEncodingException;
franta-hg@72: import java.sql.ResultSet;
franta-hg@72: import java.sql.SQLException;
franta-hg@72: import java.util.ArrayList;
franta-hg@109: import java.util.Arrays;
franta-hg@72: import java.util.Date;
franta-hg@72: import java.util.Enumeration;
franta-hg@74: import java.util.logging.Level;
franta-hg@74: import java.util.logging.Logger;
franta-hg@109: import java.util.regex.Matcher;
franta-hg@109: import java.util.regex.Pattern;
franta-hg@72: import javax.mail.Header;
franta-hg@72: import javax.mail.MessagingException;
franta-hg@72: import javax.mail.Multipart;
franta-hg@72: import javax.mail.Session;
franta-hg@72: import javax.mail.internet.InternetAddress;
franta-hg@72: import javax.mail.internet.MimeBodyPart;
franta-hg@72: import javax.mail.internet.MimeMessage;
franta-hg@72: import javax.mail.internet.MimeMultipart;
franta-hg@104: import javax.xml.parsers.DocumentBuilder;
franta-hg@104: import javax.xml.parsers.DocumentBuilderFactory;
franta-hg@104: import javax.xml.parsers.ParserConfigurationException;
franta-hg@74: import javax.xml.transform.Transformer;
franta-hg@103: import javax.xml.transform.TransformerException;
franta-hg@74: import javax.xml.transform.TransformerFactory;
franta-hg@104: import javax.xml.transform.dom.DOMSource;
franta-hg@74: import javax.xml.transform.stream.StreamResult;
franta-hg@74: import javax.xml.transform.stream.StreamSource;
franta-hg@102: import org.sonews.daemon.NNTPConnection;
franta-hg@74: import org.sonews.util.io.Resource;
franta-hg@104: import org.w3c.dom.Document;
franta-hg@104: import org.xml.sax.SAXException;
franta-hg@72: 
franta-hg@72: /**
franta-hg@72:  * This is MimeMessage which enables custom Message-ID header
franta-hg@72:  * (this header will not be overwritten by the default one like in MimeMessage).
franta-hg@72:  * 
franta-hg@72:  * Also add header and body separate serialization.
franta-hg@72:  * 
franta-hg@118:  * And can be deserialized from SQL ResultSet or an Article
franta-hg@72:  * 
franta-hg@72:  * @author František Kučera (frantovo.cz)
franta-hg@72:  */
franta-hg@72: public class DrupalMessage extends MimeMessage {
franta-hg@72: 
franta-hg@116: 	/**
franta-hg@116: 	 * If body of message posted by user through NNTP starts with this text,
franta-hg@116: 	 * it will be treated as formated text in Markdown syntax.
franta-hg@116: 	 */
franta-hg@74: 	private static final Logger log = Logger.getLogger(DrupalMessage.class.getName());
franta-hg@72: 	private static final String MESSAGE_ID_HEADER = "Message-ID";
franta-hg@72: 	private static final String CRLF = "\r\n";
franta-hg@72: 	public static final String CHARSET = "UTF-8";
franta-hg@72: 	private static final String XHTML_CONTENT_TYPE = "text/html; charset=" + CHARSET;
franta-hg@100: 	private static final String ZNAKČKA_KONCE_ŘÁDKU = "◆";
franta-hg@118: 	private static final String MARKDOWN_HEADER = "#!markdown\r\n";
franta-hg@118: 	private static final String SIGNATURE_BLOCK = "\r\n-- \r\n";
franta-hg@72: 	private String messageID;
franta-hg@102: 	private Long parentID;
franta-hg@102: 	private Long groupID;
franta-hg@104: 	private TransformerFactory transformerFactory;
franta-hg@104: 	private DocumentBuilderFactory documentBuilderFactory;
franta-hg@104: 
franta-hg@104: 	/**
franta-hg@104: 	 * Initializes XML factories (Transformer, DocumentBuilder).
franta-hg@104: 	 */
franta-hg@104: 	private void initFactories() {
franta-hg@104: 		transformerFactory = TransformerFactory.newInstance();
franta-hg@104: 		documentBuilderFactory = DocumentBuilderFactory.newInstance();
franta-hg@104: 		/**
franta-hg@104: 		 * Komentáře nás nepotřebujeme 
franta-hg@104: 		 * (a museli bychom je brát v úvahu při dělení odstavců:
franta-hg@104: 		 * v současné verzi XSLT odstavcovače by nám případný komentář
franta-hg@104: 		 * rozdělil text na dva odstavce, přestože to má být odstavec jede).
franta-hg@104: 		 */
franta-hg@104: 		documentBuilderFactory.setIgnoringComments(true);
franta-hg@104: 	}
franta-hg@72: 
franta-hg@72: 	/**
franta-hg@72: 	 * Constructs MIME message from SQL result.
franta-hg@72: 	 * @param rs ResultSet containing message data. No {@link ResultSet#next()} will be called, just values from current row will be read.
franta-hg@72: 	 * @param constructBody true if whole message should be constructed | false if we need only message headers (body will be dummy).
franta-hg@72: 	 */
franta-hg@104: 	public DrupalMessage(ResultSet rs, String myDomain, boolean constructBody) throws SQLException, UnsupportedEncodingException, MessagingException, TransformerException, IOException, ParserConfigurationException, SAXException {
franta-hg@72: 		super(Session.getDefaultInstance(System.getProperties()));
franta-hg@104: 		initFactories();
franta-hg@72: 
franta-hg@102: 		groupID = rs.getLong("group_id");
franta-hg@102: 		addHeader("Message-id", constructMessageId(rs.getInt("id"), groupID, rs.getString("group_name"), myDomain));
franta-hg@72: 		addHeader("Newsgroups", rs.getString("group_name"));
franta-hg@74: 		setFrom(new InternetAddress(rs.getString("sender_email"), rs.getString("sender_name")));
franta-hg@72: 		setSubject(rs.getString("subject"));
franta-hg@72: 		setSentDate(new Date(rs.getLong("created")));
franta-hg@74: 
franta-hg@102: 		parentID = rs.getLong("parent_id");
franta-hg@74: 		if (parentID > 0) {
franta-hg@72: 			String parentMessageID = constructMessageId(parentID, rs.getInt("group_id"), rs.getString("group_name"), myDomain);
franta-hg@72: 			addHeader("In-Reply-To", parentMessageID);
franta-hg@72: 			addHeader("References", parentMessageID);
franta-hg@72: 		}
franta-hg@72: 
franta-hg@72: 		if (constructBody) {
franta-hg@72: 			Multipart multipart = new MimeMultipart("alternative");
franta-hg@72: 			setContent(multipart);
franta-hg@72: 
franta-hg@82: 			/** XHTML part */
franta-hg@82: 			MimeBodyPart htmlPart = new MimeBodyPart();
franta-hg@103: 			String xhtmlText = readXhtmlText(
franta-hg@103: 					rs.getString("text"),
franta-hg@103: 					rs.getString("subject"),
franta-hg@103: 					rs.getInt("parent_id"),
franta-hg@103: 					rs.getString("urlBase"),
franta-hg@103: 					rs.getString("wwwRead"),
franta-hg@103: 					rs.getString("wwwPost"));
franta-hg@82: 			htmlPart.setContent(xhtmlText, XHTML_CONTENT_TYPE);
franta-hg@84: 
franta-hg@74: 			/** Plain text part */
franta-hg@72: 			MimeBodyPart textPart = new MimeBodyPart();
franta-hg@106: 			String plainText = formatedToPlainText(xhtmlText);
franta-hg@89: 			textPart.setText(plainText);
franta-hg@89: 			//addHeader("Lines", String.valueOf(plainText.split("\n").length));
franta-hg@87: 
franta-hg@87: 			/**
franta-hg@87: 			 * Thunderbirdu záleží, v jakém pořadí části jsou 
franta-hg@87: 			 * (když je prostý text druhý, html se nezobrazí),
franta-hg@87: 			 * KNode zobrazuje HTML správně, i když je na prvním místě.
franta-hg@87: 			 */
franta-hg@72: 			multipart.addBodyPart(textPart);
franta-hg@87: 			multipart.addBodyPart(htmlPart);
franta-hg@72: 		} else {
franta-hg@82: 			/** empty body, just headers */
franta-hg@72: 			setText("");
franta-hg@72: 		}
franta-hg@72: 	}
franta-hg@72: 
franta-hg@102: 	/**
franta-hg@102: 	 * Constructs MIME message from article posted by user.
franta-hg@102: 	 * @param article article that came through NNTP.
franta-hg@102: 	 * @throws MessagingException 
franta-hg@102: 	 */
franta-hg@102: 	public DrupalMessage(Article article) throws MessagingException {
franta-hg@102: 		super(Session.getDefaultInstance(System.getProperties()), serializeArticle(article));
franta-hg@104: 		initFactories();
franta-hg@102: 
franta-hg@109: 		String[] replyToHeaders = getHeader("In-Reply-To");
franta-hg@109: 		String[] referencesHeaders = getHeader("References");
franta-hg@109: 		String parentMessageID;
franta-hg@109: 		if (replyToHeaders != null && replyToHeaders.length == 1) {
franta-hg@109: 			parentMessageID = replyToHeaders[0];
franta-hg@109: 		} else if (referencesHeaders != null && referencesHeaders.length == 1) {
franta-hg@109: 			Pattern p = Pattern.compile("(\\s*<.*>)*\\s*(<.*>)");
franta-hg@109: 			Matcher m = p.matcher(referencesHeaders[0]);
franta-hg@109: 
franta-hg@109: 			if (m.matches()) {
franta-hg@109: 				parentMessageID = m.group(2);
franta-hg@109: 			} else {
franta-hg@109: 				throw new MessagingException("Message posted by user had invalid References header: " + referencesHeaders[0]);
franta-hg@109: 			}
franta-hg@102: 		} else {
franta-hg@109: 			throw new MessagingException("Message posted by user must have exactly one In-Reply-To header. Reply-To headers: " + Arrays.toString(replyToHeaders) + " Referemces headers: " + Arrays.toString(referencesHeaders));
franta-hg@102: 		}
franta-hg@109: 
franta-hg@109: 		parentID = parseArticleID(parentMessageID);
franta-hg@109: 		groupID = parseGroupID(parentMessageID);
franta-hg@102: 	}
franta-hg@102: 
franta-hg@102: 	private static InputStream serializeArticle(Article a) {
franta-hg@102: 		byte articleHeaders[] = a.getHeaderSource().getBytes();
franta-hg@102: 		byte delimiter[] = (NNTPConnection.NEWLINE + NNTPConnection.NEWLINE).getBytes();
franta-hg@102: 		byte body[] = a.getBody();
franta-hg@102: 
franta-hg@102: 		byte message[] = new byte[articleHeaders.length + delimiter.length + body.length];
franta-hg@102: 
franta-hg@102: 		System.arraycopy(articleHeaders, 0, message, 0, articleHeaders.length);
franta-hg@102: 		System.arraycopy(delimiter, 0, message, articleHeaders.length, delimiter.length);
franta-hg@102: 		System.arraycopy(body, 0, message, articleHeaders.length + delimiter.length, body.length);
franta-hg@102: 
franta-hg@102: 		return new ByteArrayInputStream(message);
franta-hg@102: 	}
franta-hg@102: 
franta-hg@106: 	/**
franta-hg@106: 	 * @param xhtmlText well-formed XHTML
franta-hg@106: 	 * @return plain text representation of this formated text
franta-hg@106: 	 */
franta-hg@106: 	private String formatedToPlainText(String xhtmlText) {
franta-hg@89: 		try {
franta-hg@104: 			Transformer textTransformer = transformerFactory.newTransformer(new StreamSource(Resource.getAsStream("helpers/mimeTextPart.xsl")));
franta-hg@89: 
franta-hg@89: 			StringReader input = new StringReader(xhtmlText);
franta-hg@89: 			StringWriter output = new StringWriter(xhtmlText.length());
franta-hg@89: 			textTransformer.transform(new StreamSource(input), new StreamResult(output));
franta-hg@89: 
franta-hg@89: 			return output.toString();
franta-hg@89: 		} catch (Exception e) {
franta-hg@89: 			/**
franta-hg@89: 			 * TODO: lepší ošetření chyby
franta-hg@89: 			 */
franta-hg@89: 			log.log(Level.WARNING, "Error while transforming article to plain text", e);
franta-hg@106: 			return "Při transformaci příspěvku bohužel došlo k chybě.";
franta-hg@89: 		}
franta-hg@72: 	}
franta-hg@72: 
franta-hg@104: 	private DOMSource readDOM(String xml) throws ParserConfigurationException, SAXException, IOException {
franta-hg@104: 		DocumentBuilder db = documentBuilderFactory.newDocumentBuilder();
franta-hg@104: 		Document d = db.parse(new ByteArrayInputStream(xml.getBytes("UTF-8")));
franta-hg@104: 		return new DOMSource(d);
franta-hg@104: 	}
franta-hg@104: 
franta-hg@105: 	private String readXhtmlText(String sourceText, String subject, long parentId, String urlBase, String wwwRead, String wwwPost) throws TransformerException, IOException, ParserConfigurationException, SAXException {
franta-hg@72: 		/**
franta-hg@82: 		 * TODO: 
franta-hg@104: 		 *		- znovupoužívat XSL transformér (nejen v instanci)
franta-hg@82: 		 *		- používat cache, ukládat si vygenerované články
franta-hg@72: 		 */
franta-hg@105: 		String wrappedText = makeSimpleXHTML(sourceText);
franta-hg@103: 
franta-hg@104: 		Transformer paragraphTransformer = transformerFactory.newTransformer(new StreamSource(Resource.getAsStream("helpers/mimeXhtmlPart-make-paragraphs.xsl")));
franta-hg@103: 		String paragraphedText;
franta-hg@103: 		boolean tidyWasUsed = false;
franta-hg@74: 		try {
franta-hg@105: 			StringWriter output = new StringWriter(2 * wrappedText.length());
franta-hg@105: 			paragraphTransformer.transform(readDOM(wrappedText), new StreamResult(output));
franta-hg@103: 			paragraphedText = output.toString();
franta-hg@103: 		} catch (Exception e) {
franta-hg@103: 			log.log(Level.FINER, "HTML input was shitty – Tidy had to be called.", e);
franta-hg@105: 			StringWriter output = new StringWriter(2 * wrappedText.length());
franta-hg@105: 			paragraphTransformer.transform(readDOM(tidyXhtml(wrappedText)), new StreamResult(output));
franta-hg@103: 			paragraphedText = output.toString();
franta-hg@103: 			tidyWasUsed = true;
franta-hg@103: 		}
franta-hg@75: 
franta-hg@104: 		Transformer xhtmlTransformer = transformerFactory.newTransformer(new StreamSource(Resource.getAsStream("helpers/mimeXhtmlPart.xsl")));
franta-hg@103: 		xhtmlTransformer.setParameter("isRoot", (parentId == 0));
franta-hg@103: 		xhtmlTransformer.setParameter("title", subject);
franta-hg@103: 		xhtmlTransformer.setParameter("urlBase", urlBase);
franta-hg@103: 		xhtmlTransformer.setParameter("wwwRead", wwwRead);
franta-hg@103: 		xhtmlTransformer.setParameter("wwwPost", wwwPost);
franta-hg@103: 		xhtmlTransformer.setParameter("headComment", String.format("Drupal-NNTP bridge. Transformed: %1$tc. Tidy had to be used: %2$b", new Date(), tidyWasUsed));
franta-hg@105: 		StringReader paragraphedReader = new StringReader(paragraphedText);
franta-hg@105: 		StringWriter xhtmlWriter = new StringWriter(2 * paragraphedText.length());
franta-hg@105: 		xhtmlTransformer.transform(new StreamSource(paragraphedReader), new StreamResult(xhtmlWriter));
franta-hg@75: 
franta-hg@105: 		return xhtmlWriter.toString();
franta-hg@72: 	}
franta-hg@72: 
franta-hg@103: 	/**
franta-hg@116: 	 * Converts markdown to XHTML.
franta-hg@116: 	 * @param markdown text in Markdown syntax
franta-hg@116: 	 * @return XHTML document (with html/body elements)
franta-hg@116: 	 * @throws StorageBackendException when markdown proces returned any errors 
franta-hg@116: 	 * (other exceptions are thrown when afterwards XHTML validation fails).
franta-hg@116: 	 */
franta-hg@116: 	private String readXhtmlTextMarkdown(String markdown) throws TransformerException, IOException, ParserConfigurationException, SAXException, StorageBackendException {
franta-hg@116: 		Runtime r = Runtime.getRuntime();
franta-hg@116: 		Process p = r.exec(new String[]{"sudo", "-u", "markdown", "/usr/bin/markdown"});
franta-hg@116: 
franta-hg@116: 		PrintStream processInput = new PrintStream(p.getOutputStream());
franta-hg@116: 		processInput.print(markdown);
franta-hg@116: 		processInput.close();
franta-hg@116: 
franta-hg@116: 		String errors = streamToString(p.getErrorStream());
franta-hg@116: 		String htmlFragment = streamToString(p.getInputStream());
franta-hg@116: 
franta-hg@116: 		if (errors.length() == 0) {
franta-hg@116: 			String htmlDocument = makeSimpleXHTML(htmlFragment);
franta-hg@116: 			String xhtmlDocument = readXhtmlText(htmlDocument, null, -1, null, null, null);
franta-hg@116: 			return xhtmlDocument;
franta-hg@116: 		} else {
franta-hg@116: 			throw new StorageBackendException("Error while transforming Markdown to XHTML: " + errors);
franta-hg@116: 		}
franta-hg@116: 	}
franta-hg@116: 
franta-hg@116: 	/**
franta-hg@103: 	 * Does not parse XML works just with text.
franta-hg@103: 	 * @param body XHTML fragment that should be put between &lt;body&gt; and &lt;/body&gt;
franta-hg@103: 	 * @return simple XHTML document (body wrapped in html and body tags)
franta-hg@103: 	 */
franta-hg@84: 	private static String makeSimpleXHTML(String body) {
franta-hg@84: 		return "<html xmlns=\"http://www.w3.org/1999/xhtml\"><body>" + body + "</body></html>";
franta-hg@84: 	}
franta-hg@84: 
franta-hg@75: 	/**
franta-hg@103: 	 * Does not parse XML works just with text.
franta-hg@103: 	 * @param xhtml whole XHTML page
franta-hg@103: 	 * @return content between &lt;body&gt; and &lt;/body&gt; tags.
franta-hg@103: 	 */
franta-hg@103: 	private static String makeFragmentXHTML(String xhtml) {
franta-hg@103: 		final String startTag = "<body>";
franta-hg@103: 		final String endTag = "</body>";
franta-hg@103: 
franta-hg@103: 		int start = xhtml.indexOf(startTag) + startTag.length();
franta-hg@103: 		int end = xhtml.lastIndexOf(endTag);
franta-hg@103: 
franta-hg@103: 		return xhtml.substring(start, end);
franta-hg@103: 	}
franta-hg@103: 
franta-hg@103: 	/**
franta-hg@75: 	 * TODO: refaktorovat, přesunout
franta-hg@75: 	 */
franta-hg@75: 	private static String tidyXhtml(String inputText) throws IOException {
franta-hg@89: 		/*
franta-hg@89: 		 * Viz https://sourceforge.net/tracker/index.php?func=detail&aid=3424437&group_id=27659&atid=390966
franta-hg@89: 		 *
franta-hg@89: 		 * TODO:
franta-hg@89: 		 *		- použít delší zástupný řetězec, ne jen jeden znak
franta-hg@89: 		 *		- umísťovat ho jen tam, kde už nějaký text je (ne mezi >\s*<)
franta-hg@89: 		 */
franta-hg@100: 		inputText = označKonceŘádků(inputText);
franta-hg@82: 
franta-hg@75: 		Runtime r = Runtime.getRuntime();
franta-hg@118: 		// TODO: spouštět přes sudo jako Markdown
franta-hg@82: 		Process p = r.exec(new String[]{"tidy", // http://tidy.sourceforge.net
franta-hg@82: 					"-asxml", // well formed XHTML
franta-hg@82: 					"-numeric", // číselné entity
franta-hg@82: 					"-utf8", // kódování
franta-hg@82: 					"--show-warnings", "false", // žádná varování nás nezajímají
franta-hg@82: 					"--show-errors", "0", // ani chyby
franta-hg@82: 					"--doctype", "omit", // doctype nepotřebujeme (doplníme si případně vlastní v XSLT)
franta-hg@82: 					"--logical-emphasis", "true", // em a strong místo i a b
franta-hg@82: 					"--literal-attributes", "true", // zachovat mezery a konce řádků v atributech
franta-hg@82: 					"--force-output", "true" // neznámé značky zahodíme, vložíme jen jejich obsah
franta-hg@82: 				});
franta-hg@75: 
franta-hg@75: 		PrintStream vstupProcesu = new PrintStream(p.getOutputStream());
franta-hg@75: 		vstupProcesu.print(inputText);
franta-hg@75: 		vstupProcesu.close();
franta-hg@75: 
franta-hg@75: 		String outputText = streamToString(p.getInputStream());
franta-hg@75: 
franta-hg@100: 		outputText = vraťKonceŘádků(outputText);
franta-hg@82: 
franta-hg@75: 		return outputText;
franta-hg@75: 	}
franta-hg@75: 
franta-hg@100: 	private static String označKonceŘádků(String text) {
franta-hg@100: 		text = text.replaceAll(">\\s+<", "> <");
franta-hg@100: 		text = text.replaceAll("\\n", ZNAKČKA_KONCE_ŘÁDKU + "\n");
franta-hg@100: 		return text;
franta-hg@100: 	}
franta-hg@100: 
franta-hg@100: 	private static String vraťKonceŘádků(String text) {
franta-hg@100: 		text = text.replaceAll(ZNAKČKA_KONCE_ŘÁDKU + "\\n", "\n");
franta-hg@100: 		text = text.replaceAll(ZNAKČKA_KONCE_ŘÁDKU, "\n");
franta-hg@100: 		return text;
franta-hg@100: 	}
franta-hg@100: 
franta-hg@75: 	/**
franta-hg@75: 	 * TODO: refaktorovat, přesunout
franta-hg@75: 	 */
franta-hg@75: 	private static String streamToString(InputStream proud) throws IOException {
franta-hg@75: 		StringBuilder výsledek = new StringBuilder();
franta-hg@75: 		BufferedReader buf = new BufferedReader(new InputStreamReader(proud));
franta-hg@75: 		while (true) {
franta-hg@75: 			String radek = buf.readLine();
franta-hg@75: 			if (radek == null) {
franta-hg@75: 				break;
franta-hg@75: 			} else {
franta-hg@75: 				výsledek.append(radek);
franta-hg@75: 				výsledek.append("\n");
franta-hg@75: 			}
franta-hg@75: 		}
franta-hg@75: 		return výsledek.toString();
franta-hg@75: 	}
franta-hg@75: 
franta-hg@102: 	public static String constructMessageId(long articleID, long groupID, String groupName, String domainName) {
franta-hg@72: 		StringBuilder sb = new StringBuilder();
franta-hg@72: 		sb.append("<");
franta-hg@72: 		sb.append(articleID);
franta-hg@72: 		sb.append("-");
franta-hg@72: 		sb.append(groupID);
franta-hg@72: 		sb.append("-");
franta-hg@72: 		sb.append(groupName);
franta-hg@72: 		sb.append("@");
franta-hg@72: 		sb.append(domainName);
franta-hg@72: 		sb.append(">");
franta-hg@72: 		return sb.toString();
franta-hg@72: 	}
franta-hg@72: 
franta-hg@102: 	/**
franta-hg@102: 	 * @return article ID of parent of this message | or null, if this is root article and not reply to another one
franta-hg@102: 	 */
franta-hg@102: 	public Long getParentID() {
franta-hg@102: 		return parentID;
franta-hg@102: 	}
franta-hg@102: 
franta-hg@102: 	/**
franta-hg@102: 	 * @return group ID of this message | or null, if this message is not reply to any other one – which is wrong because we have to know the group
franta-hg@102: 	 */
franta-hg@102: 	public Long getGroupID() {
franta-hg@102: 		return groupID;
franta-hg@102: 	}
franta-hg@102: 
franta-hg@102: 	/**
franta-hg@102: 	 * 
franta-hg@102: 	 * @param messageID &lt;{0}-{1}-{2}@domain.tld&gt; where {0} is nntp_id and {1} is group_id and {2} is group_name
franta-hg@102: 	 * @return array where [0] = nntp_id and [1] = group_id and [2] = group_name or returns null if messageID is invalid
franta-hg@102: 	 */
franta-hg@102: 	private static String[] parseMessageID(String messageID) {
franta-hg@102: 		if (messageID.matches("<[0-9]+\\-[0-9]+\\-[a-z0-9\\.]+@.+>")) {
franta-hg@102: 			return messageID.substring(1).split("@")[0].split("\\-");
franta-hg@102: 		} else {
franta-hg@102: 			return null;
franta-hg@102: 		}
franta-hg@102: 	}
franta-hg@102: 
franta-hg@102: 	public static Long parseArticleID(String messageID) {
franta-hg@102: 		String[] localPart = parseMessageID(messageID);
franta-hg@102: 		if (localPart == null) {
franta-hg@102: 			return null;
franta-hg@102: 		} else {
franta-hg@102: 			return Long.parseLong(localPart[0]);
franta-hg@102: 		}
franta-hg@102: 	}
franta-hg@102: 
franta-hg@102: 	public static Long parseGroupID(String messageID) {
franta-hg@102: 		String[] localPart = parseMessageID(messageID);
franta-hg@102: 		if (localPart == null) {
franta-hg@102: 			return null;
franta-hg@102: 		} else {
franta-hg@102: 			return Long.parseLong(localPart[1]);
franta-hg@102: 			// If needed:
franta-hg@102: 			// parseGroupName() will be same as this method, just with:
franta-hg@102: 			// return localPart[2];
franta-hg@102: 		}
franta-hg@102: 	}
franta-hg@102: 
franta-hg@72: 	@Override
franta-hg@72: 	public void setHeader(String name, String value) throws MessagingException {
franta-hg@72: 		super.setHeader(name, value);
franta-hg@72: 
franta-hg@72: 		if (MESSAGE_ID_HEADER.equalsIgnoreCase(name)) {
franta-hg@72: 			messageID = value;
franta-hg@72: 		}
franta-hg@72: 	}
franta-hg@72: 
franta-hg@72: 	@Override
franta-hg@72: 	public final void addHeader(String name, String value) throws MessagingException {
franta-hg@72: 		super.addHeader(name, value);
franta-hg@72: 
franta-hg@72: 		if (MESSAGE_ID_HEADER.equalsIgnoreCase(name)) {
franta-hg@72: 			messageID = value;
franta-hg@72: 		}
franta-hg@72: 	}
franta-hg@72: 
franta-hg@72: 	@Override
franta-hg@72: 	public void removeHeader(String name) throws MessagingException {
franta-hg@72: 		super.removeHeader(name);
franta-hg@72: 
franta-hg@72: 		if (MESSAGE_ID_HEADER.equalsIgnoreCase(name)) {
franta-hg@72: 			messageID = null;
franta-hg@72: 		}
franta-hg@72: 	}
franta-hg@72: 
franta-hg@72: 	public void setMessageID(String messageID) {
franta-hg@72: 		this.messageID = messageID;
franta-hg@72: 	}
franta-hg@72: 
franta-hg@72: 	@Override
franta-hg@72: 	protected void updateMessageID() throws MessagingException {
franta-hg@72: 		if (messageID == null) {
franta-hg@72: 			super.updateMessageID();
franta-hg@72: 		} else {
franta-hg@72: 			setHeader(MESSAGE_ID_HEADER, messageID);
franta-hg@72: 		}
franta-hg@72: 	}
franta-hg@72: 
franta-hg@72: 	/**
franta-hg@72: 	 * Call {@link #saveChanges()} before this method, if you want all headers including such ones like:
franta-hg@72: 	 * 
franta-hg@72: 	 * <pre>MIME-Version: 1.0
franta-hg@72: 	 *Content-Type: multipart/alternative;</pre>
franta-hg@72: 	 * 
franta-hg@72: 	 * @return serialized headers
franta-hg@72: 	 * @throws MessagingException if getAllHeaders() fails
franta-hg@72: 	 */
franta-hg@72: 	public String getHeaders() throws MessagingException {
franta-hg@72: 		StringBuilder sb = new StringBuilder();
franta-hg@72: 		for (Enumeration eh = getAllHeaderLines(); eh.hasMoreElements();) {
franta-hg@72: 			sb.append(eh.nextElement());
franta-hg@72: 			sb.append(CRLF);
franta-hg@72: 		}
franta-hg@72: 		return sb.toString();
franta-hg@72: 	}
franta-hg@72: 
franta-hg@72: 	public byte[] getBody() throws IOException, MessagingException {
franta-hg@72: 		saveChanges();
franta-hg@72: 
franta-hg@72: 		ArrayList<String> skipHeaders = new ArrayList<String>();
franta-hg@72: 		for (Enumeration eh = getAllHeaders(); eh.hasMoreElements();) {
franta-hg@72: 			Header h = (Header) eh.nextElement();
franta-hg@72: 			skipHeaders.add(h.getName());
franta-hg@72: 		}
franta-hg@72: 
franta-hg@72: 		ByteArrayOutputStream baos = new ByteArrayOutputStream(1024);
franta-hg@72: 		writeTo(baos, skipHeaders.toArray(new String[skipHeaders.size()]));
franta-hg@72: 		return baos.toByteArray();
franta-hg@72: 	}
franta-hg@103: 
franta-hg@103: 	/**
franta-hg@103: 	 * Transforms message content to valid XHTML and strips html and body tags.
franta-hg@103: 	 * When receiving message from user through NNTP 
franta-hg@103: 	 * this method is used to get text that should be saved into databse.
franta-hg@103: 	 * @return XHTML fragment – content between &lt;body&gt; and &lt;/body&gt; tags.
franta-hg@103: 	 */
franta-hg@103: 	public String getBodyXhtmlFragment() throws StorageBackendException {
franta-hg@103: 		/**
franta-hg@118: 		 * TODO: 
franta-hg@118: 		 *  - tohle dělat už v konstruktoru a pak už mít všechno stejné, ať už jde o zprávu přijatou od NNTP uživatele nebo načtenou z DB
franta-hg@118: 		 *	- podporovat i zprávy přímo v HTML a multipart.
franta-hg@118: 		 *	- ořezávat podpis (SIGNATURE_BLOCK)
franta-hg@103: 		 */
franta-hg@103: 		try {
franta-hg@103: 			Object c = getContent();
franta-hg@103: 			if (isMimeType("text/plain") && c instanceof String) {
franta-hg@116: 				String inputText = (String) c;
franta-hg@116: 				String xhtml;
franta-hg@116: 
franta-hg@116: 				if (inputText.startsWith(MARKDOWN_HEADER)) {
franta-hg@116: 					xhtml = readXhtmlTextMarkdown(inputText.substring(MARKDOWN_HEADER.length()));
franta-hg@116: 				} else {
franta-hg@116: 
franta-hg@116: 					xhtml = readXhtmlText(
franta-hg@116: 							inputText,
franta-hg@116: 							getSubject(),
franta-hg@116: 							getParentID(),
franta-hg@116: 							null,
franta-hg@116: 							null,
franta-hg@116: 							null);
franta-hg@116: 				}
franta-hg@103: 				return makeFragmentXHTML(xhtml);
franta-hg@103: 			} else {
franta-hg@103: 				throw new StorageBackendException("Only text/plain messages are supported for now – post it as plain text please.");
franta-hg@103: 			}
franta-hg@103: 		} catch (Exception e) {
franta-hg@103: 			throw new StorageBackendException(e);
franta-hg@103: 		}
franta-hg@103: 	}
franta-hg@109: 
franta-hg@106: 	public String getBodyPlainText() throws StorageBackendException {
franta-hg@106: 		/**
franta-hg@106: 		 * TODO: netransformovat XHTML 2x
franta-hg@106: 		 */
franta-hg@106: 		return formatedToPlainText(makeSimpleXHTML(getBodyXhtmlFragment()));
franta-hg@106: 	}
franta-hg@72: }