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379 lines
14 KiB
379 lines
14 KiB
// BlogBoardComments.java
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// -------------------------------------
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// (C) by Michael Peter Christen; mc@yacy.net
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// first published on http://www.anomic.de
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// Frankfurt, Germany, 2004
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// last major change: 20.07.2004
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//
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// $LastChangedDate$
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// $LastChangedRevision$
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// $LastChangedBy$
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//
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// This program is free software; you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation; either version 2 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program; if not, write to the Free Software
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// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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// This file is contributed by Jan Sandbrink
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// based on the Code of wikiBoard.java
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package de.anomic.data;
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import java.io.ByteArrayInputStream;
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import java.io.File;
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import java.io.IOException;
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import java.io.UnsupportedEncodingException;
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import java.text.ParseException;
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import java.text.SimpleDateFormat;
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import java.util.ArrayList;
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import java.util.Date;
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import java.util.HashMap;
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import java.util.Iterator;
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import java.util.Locale;
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import java.util.Map;
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import java.util.TimeZone;
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import javax.xml.parsers.DocumentBuilder;
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import javax.xml.parsers.DocumentBuilderFactory;
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import javax.xml.parsers.ParserConfigurationException;
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import net.yacy.kelondro.blob.MapHeap;
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import net.yacy.kelondro.index.RowSpaceExceededException;
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import net.yacy.kelondro.logging.Log;
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import net.yacy.kelondro.order.Base64Order;
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import net.yacy.kelondro.order.NaturalOrder;
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import org.w3c.dom.Document;
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import org.w3c.dom.Node;
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import org.w3c.dom.NodeList;
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import org.xml.sax.SAXException;
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import de.anomic.data.wiki.WikiBoard;
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public class BlogBoardComments {
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private final static int KEY_LENGTH = 64;
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private final static String DATE_FORMAT = "yyyyMMddHHmmss";
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private final static SimpleDateFormat SIMPLE_DATE_FORMATTER = new SimpleDateFormat(DATE_FORMAT, Locale.US);
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static {
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SIMPLE_DATE_FORMATTER.setTimeZone(TimeZone.getTimeZone("GMT"));
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}
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private MapHeap database = null;
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public BlogBoardComments(final File actpath) throws IOException {
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new File(actpath.getParent()).mkdir();
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//database = new MapView(BLOBTree.toHeap(actpath, true, true, keyLength, recordSize, '_', NaturalOrder.naturalOrder, newFile), 500, '_');
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database = new MapHeap(actpath, KEY_LENGTH, NaturalOrder.naturalOrder, 1024 * 64, 500, '_');
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}
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public int size() {
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return database.size();
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}
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public void close() {
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database.close();
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}
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static String dateString(final Date date) {
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synchronized (SIMPLE_DATE_FORMATTER) {
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return SIMPLE_DATE_FORMATTER.format(date);
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}
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}
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private static String normalize(final String key) {
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return (key == null) ? "null" : key.trim().toLowerCase();
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}
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public static String webalize(final String key) {
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if (key == null) {
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return "null";
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}
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String ret = key.trim().toLowerCase();
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int p;
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while ((p = ret.indexOf(" ")) >= 0)
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ret = ret.substring(0, p) + "%20" + key.substring(p +1);
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return ret;
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}
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public String guessAuthor(final String ip) {
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return WikiBoard.guessAuthor(ip);
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}
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public CommentEntry newEntry(final String key, final byte[] subject, final byte[] author, final String ip, final Date date, final byte[] page) {
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return new CommentEntry(normalize(key), subject, author, ip, date, page);
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}
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public String write(final CommentEntry page) {
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// writes a new page and returns key
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try {
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database.insert(page.key.getBytes(), page.record);
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return page.key;
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} catch (final Exception e) {
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Log.logException(e);
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return null;
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}
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}
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public CommentEntry read(final String key) {
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//System.out.println("DEBUG: read from blogBoardComments");
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return read(key, database);
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}
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private CommentEntry read(final String key, final MapHeap base) {
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String copyOfKey = normalize(key);
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copyOfKey = copyOfKey.substring(0, Math.min(copyOfKey.length(), KEY_LENGTH));
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Map<String, String> record;
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try {
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record = base.get(copyOfKey.getBytes());
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} catch (final IOException e) {
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Log.logException(e);
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record = null;
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} catch (RowSpaceExceededException e) {
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Log.logException(e);
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record = null;
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}
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return (record == null) ?
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newEntry(copyOfKey, new byte[0], "anonymous".getBytes(), "127.0.0.1", new Date(), new byte[0]) :
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new CommentEntry(copyOfKey, record);
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}
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public boolean importXML(final String input) {
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boolean ret = false;
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final DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
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try {
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final DocumentBuilder builder = factory.newDocumentBuilder();
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final Document doc = builder.parse(new ByteArrayInputStream(input.getBytes()));
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ret = parseXMLimport(doc);
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}
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catch (final ParserConfigurationException e) {}
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catch (final SAXException e) {}
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catch (final IOException e) {}
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return ret;
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}
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private boolean parseXMLimport(final Document doc) {
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if(!"blog".equals(doc.getDocumentElement().getTagName())) {
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return false;
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}
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final NodeList items = doc.getDocumentElement().getElementsByTagName("item");
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if(items.getLength() == 0) {
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return false;
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}
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for(int i = 0, n = items.getLength(); i < n; ++i) {
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String key = null, ip = null, StrSubject = null, StrAuthor = null, StrPage = null, StrDate = null;
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Date date = null;
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if(!"item".equals(items.item(i).getNodeName()))
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continue;
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final NodeList currentNodeChildren = items.item(i).getChildNodes();
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for(int j=0, m = currentNodeChildren.getLength(); j < m; ++j) {
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final Node currentNode = currentNodeChildren.item(j);
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if ("id".equals(currentNode.getNodeName())) {
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key = currentNode.getFirstChild().getNodeValue();
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} else if("ip".equals(currentNode.getNodeName())) {
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ip = currentNode.getFirstChild().getNodeValue();
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} else if("timestamp".equals(currentNode.getNodeName())) {
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StrDate = currentNode.getFirstChild().getNodeValue();
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} else if("subject".equals(currentNode.getNodeName())) {
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StrSubject = currentNode.getFirstChild().getNodeValue();
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} else if("author".equals(currentNode.getNodeName())) {
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StrAuthor = currentNode.getFirstChild().getNodeValue();
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} else if("content".equals(currentNode.getNodeName())) {
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StrPage = currentNode.getFirstChild().getNodeValue();
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}
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}
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try {
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date = SIMPLE_DATE_FORMATTER.parse(StrDate);
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} catch (final ParseException ex) {
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date = new Date();
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}
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if (key == null || ip == null || StrSubject == null || StrAuthor == null || StrPage == null || date == null)
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return false;
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byte[] subject,author,page;
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try {
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subject = StrSubject.getBytes("UTF-8");
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}
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catch (final UnsupportedEncodingException ex) {
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subject = StrSubject.getBytes();
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}
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try {
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author = StrAuthor.getBytes("UTF-8");
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}
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catch (final UnsupportedEncodingException ex) {
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author = StrAuthor.getBytes();
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}
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try {
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page = StrPage.getBytes("UTF-8");
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}
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catch (final UnsupportedEncodingException ex) {
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page = StrPage.getBytes();
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}
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write (newEntry(key, subject, author, ip, date, page));
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}
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return true;
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}
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public void delete(final String key) {
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try {
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database.delete(normalize(key).getBytes());
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}
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catch (final IOException e) { }
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}
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public Iterator<byte[]> keys(final boolean up) throws IOException {
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return database.keys(up, false);
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}
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public static class CommentEntry {
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String key;
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Map<String, String> record;
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public CommentEntry(final String nkey, final byte[] subject, final byte[] author, final String ip, final Date date, final byte[] page) {
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record = new HashMap<String, String>();
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setKey(nkey);
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setDate(date);
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setSubject(subject);
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setAuthor(author);
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setIp(ip);
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setPage(page);
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WikiBoard.setAuthor(ip, new String(author));
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}
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CommentEntry(final String key, final Map<String, String> record) {
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this.key = key;
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this.record = record;
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if (this.record.get("comments") == null) {
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this.record.put("comments", ListManager.collection2string(new ArrayList<String>()));
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}
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}
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public String getKey() {
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return key;
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}
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private void setKey(final String var) {
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key = var.substring(0, Math.min(var.length(), KEY_LENGTH));
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}
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private void setSubject(final byte[] subject) {
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if (subject == null)
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record.put("subject","");
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else
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record.put("subject", Base64Order.enhancedCoder.encode(subject));
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}
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public byte[] getSubject() {
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final String subject = record.get("subject");
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if (subject == null) return new byte[0];
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final byte[] subject_bytes = Base64Order.enhancedCoder.decode(subject);
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if (subject_bytes == null) return new byte[0];
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return subject_bytes;
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}
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private void setDate(Date date) {
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if(date == null)
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date = new Date();
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record.put("date", dateString(date));
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}
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public Date getDate() {
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try {
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final String date = record.get("date");
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if (date == null) {
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if (Log.isFinest("Blog")) Log.logFinest("Blog", "ERROR: date field missing in blogBoard");
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return new Date();
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}
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synchronized (SIMPLE_DATE_FORMATTER) {
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return SIMPLE_DATE_FORMATTER.parse(date);
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}
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} catch (final ParseException e) {
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return new Date();
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}
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}
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public String getTimestamp() {
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final String timestamp = record.get("date");
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if (timestamp == null) {
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if (Log.isFinest("Blog")) Log.logFinest("Blog", "ERROR: date field missing in blogBoard");
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return dateString(new Date());
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}
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return timestamp;
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}
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private void setAuthor(final byte[] author) {
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if (author == null)
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record.put("author","");
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else
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record.put("author", Base64Order.enhancedCoder.encode(author));
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}
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public byte[] getAuthor() {
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final String author = record.get("author");
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if (author == null)
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return new byte[0];
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final byte[] author_byte = Base64Order.enhancedCoder.decode(author);
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if (author_byte == null)
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return new byte[0];
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return author_byte;
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}
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private void setIp(String ip) {
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if ((ip == null) || (ip.length() == 0))
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ip = "";
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record.put("ip", ip);
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}
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public String getIp() {
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final String ip = record.get("ip");
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if (ip == null)
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return "127.0.0.1";
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return ip;
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}
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private void setPage(final byte[] page) {
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if (page == null)
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record.put("page", "");
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else
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record.put("page", Base64Order.enhancedCoder.encode(page));
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}
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public byte[] getPage() {
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final String page = record.get("page");
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if (page == null)
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return new byte[0];
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final byte[] page_byte = Base64Order.enhancedCoder.decode(page);
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if (page_byte == null)
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return new byte[0];
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return page_byte;
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}
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/**
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* Is the comment allowed?
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* this is possible for moderated blog entry only and means
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* the administrator has explicit allowed the comment.
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* @return
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*/
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public boolean isAllowed() {
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return "true".equals(record.get("moderated"));
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}
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public void allow() {
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record.put("moderated", "true");
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}
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}
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}
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