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525 lines
18 KiB
525 lines
18 KiB
// blogBoard.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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// 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.util.ArrayList;
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import java.util.Comparator;
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import java.util.Date;
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import java.util.HashMap;
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import java.util.HashSet;
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import java.util.Iterator;
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import java.util.Map;
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import java.util.TreeSet;
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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 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.kelondro.blob.BLOBTree;
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import de.anomic.kelondro.blob.MapView;
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import de.anomic.kelondro.order.Base64Order;
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import de.anomic.kelondro.order.DateFormatter;
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import de.anomic.kelondro.order.NaturalOrder;
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import de.anomic.kelondro.util.kelondroException;
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import de.anomic.kelondro.util.Log;
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public class blogBoard {
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public static final int keyLength = 64;
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private static final int recordSize = 512;
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MapView database = null;
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public blogBoard(final File actpath) {
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new File(actpath.getParent()).mkdir();
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if (database == null) {
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database = new MapView(new BLOBTree(actpath, true, true, keyLength, recordSize, '_', NaturalOrder.naturalOrder, true, false, false), 500);
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}
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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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/**
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* Tells if the database contains an element.
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* @param key the ID of the element
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* @return true if the database contains the element, else false
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*/
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public boolean contains(final String key) {
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try {
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return database.has(key);
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} catch (IOException ex) {
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return false;
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}
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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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private static String normalize(final String key) {
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if (key == null) return "null";
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return key.trim().toLowerCase();
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}
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public static String webalize(String key) {
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if (key == null) return "null";
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key = key.trim().toLowerCase();
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int p;
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while ((p = key.indexOf(" ")) >= 0)
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key = key.substring(0, p) + "%20" + key.substring(p +1);
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return key;
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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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/**
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* Create a new BlogEntry an return it
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* @param key
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* @param subject
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* @param author
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* @param ip
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* @param date
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* @param page the content of the Blogentry
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* @param comments
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* @param commentMode possible params are: 0 - no comments allowed, 1 - comments allowed, 2 - comments moderated
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* @return BlogEntry
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*/
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public BlogEntry newEntry(final String key, final byte[] subject, final byte[] author, final String ip, final Date date, final byte[] page, final ArrayList<String> comments, final String commentMode) {
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return new BlogEntry(normalize(key), subject, author, ip, date, page, comments, commentMode);
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}
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/*
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* writes a new page and return the key
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*/
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public String writeBlogEntry(final BlogEntry page) {
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try {
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database.put(page.key, page.record);
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return page.key;
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} catch (final IOException e) {
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return null;
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}
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}
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public BlogEntry readBlogEntry(final String key) {
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return readBlogEntry(key, database);
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}
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private BlogEntry readBlogEntry(String key, final MapView base) {
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key = normalize(key);
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if (key.length() > keyLength) key = key.substring(0, keyLength);
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Map<String, String> record;
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try {
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record = base.get(key);
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} catch (final IOException e) {
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record = null;
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}
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if (record == null)
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return newEntry(key, "".getBytes(), "anonymous".getBytes(), "127.0.0.1", new Date(), "".getBytes(), null, null);
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return new BlogEntry(key, record);
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}
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public boolean importXML(final String input) {
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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("UTF-8")));
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return parseXMLimport(doc);
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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 false;
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}
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private boolean parseXMLimport(final Document doc) {
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if(!doc.getDocumentElement().getTagName().equals("blog"))
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return false;
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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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for(int i=0;i<items.getLength();++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(!items.item(i).getNodeName().equals("item"))
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continue;
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final NodeList currentNodeChildren = items.item(i).getChildNodes();
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for(int j=0;j<currentNodeChildren.getLength();++j) {
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final Node currentNode = currentNodeChildren.item(j);
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if(currentNode.getNodeName().equals("id"))
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key = currentNode.getFirstChild().getNodeValue();
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else if(currentNode.getNodeName().equals("ip"))
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ip = currentNode.getFirstChild().getNodeValue();
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else if(currentNode.getNodeName().equals("timestamp"))
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StrDate = currentNode.getFirstChild().getNodeValue();
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else if(currentNode.getNodeName().equals("subject"))
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StrSubject = currentNode.getFirstChild().getNodeValue();
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else if(currentNode.getNodeName().equals("author"))
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StrAuthor = currentNode.getFirstChild().getNodeValue();
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else if(currentNode.getNodeName().equals("content"))
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StrPage = currentNode.getFirstChild().getNodeValue();
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}
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try {
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date = DateFormatter.parseShortSecond(StrDate);
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} catch (final ParseException e1) {
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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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} catch (final UnsupportedEncodingException e1) {
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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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} catch (final UnsupportedEncodingException e1) {
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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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} catch (final UnsupportedEncodingException e1) {
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page = StrPage.getBytes();
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}
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writeBlogEntry (newEntry(key, subject, author, ip, date, page, null, null));
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}
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return true;
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}
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public void deleteBlogEntry(String key) {
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key = normalize(key);
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try {
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database.remove(key);
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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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/**
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* Comparator to sort objects of type Blog according to their timestamps
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*/
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public class BlogComparator implements Comparator<String> {
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private final boolean newestFirst;
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/**
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* @param newestFirst newest first, or oldest first?
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*/
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public BlogComparator(final boolean newestFirst){
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this.newestFirst = newestFirst;
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}
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public int compare(final String obj1, final String obj2) {
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final BlogEntry blogEntry1 = readBlogEntry(obj1);
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final BlogEntry blogEntry2 = readBlogEntry(obj2);
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if(blogEntry1 == null || blogEntry2 == null)
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return 0;
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if (this.newestFirst) {
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if (Long.parseLong(blogEntry2.getTimestamp()) - Long.parseLong(blogEntry1.getTimestamp()) > 0)
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return 1;
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return -1;
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}
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if (Long.parseLong(blogEntry1.getTimestamp()) - Long.parseLong(blogEntry2.getTimestamp()) > 0)
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return 1;
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return -1;
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}
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}
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public Iterator<String> getBlogIterator(final boolean priv){
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final TreeSet<String> set = new TreeSet<String>(new BlogComparator(true));
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final Iterator<BlogEntry> iterator = blogIterator(true);
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BlogEntry blogEntry;
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while(iterator.hasNext()){
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blogEntry=iterator.next();
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if(priv || blogEntry.isPublic()){
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set.add(blogEntry.getKey());
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}
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}
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return set.iterator();
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}
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public Iterator<BlogEntry> blogIterator(final boolean up){
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try {
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return new BlogIterator(up);
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} catch (final IOException e) {
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return new HashSet<BlogEntry>().iterator();
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}
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}
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/**
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* Subclass of blogBoard, which provides the blogIterator object-type
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*/
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public class BlogIterator implements Iterator<BlogEntry> {
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Iterator<byte[]> blogIter;
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//blogBoard.BlogEntry nextEntry;
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public BlogIterator(final boolean up) throws IOException {
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this.blogIter = blogBoard.this.database.keys(up, false);
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//this.nextEntry = null;
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}
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public boolean hasNext() {
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try {
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return this.blogIter.hasNext();
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} catch (final kelondroException e) {
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//resetDatabase();
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return false;
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}
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}
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public BlogEntry next() {
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try {
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return readBlogEntry(new String(this.blogIter.next()));
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} catch (final kelondroException e) {
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//resetDatabase();
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return null;
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}
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}
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public void remove() {
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// if (this.nextEntry != null) {
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// try {
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// final Object blogKey = this.nextEntry.getKey();
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// if (blogKey != null) deleteBlogEntry((String) blogKey);
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// } catch (final kelondroException e) {
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// //resetDatabase();
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// }
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// }
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}
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}
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public class BlogEntry {
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String key;
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Map<String, String> record;
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public BlogEntry(final String nkey, final byte[] subject, final byte[] author, final String ip, final Date date, final byte[] page, final ArrayList<String> comments, final String commentMode) {
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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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setComments(comments);
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setCommentMode(commentMode);
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// TODO: implement this function
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record.put("privacy", "public");
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wikiBoard.setAuthor(ip, new String(author));
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}
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BlogEntry(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) this.record.put("comments", listManager.collection2string(new ArrayList<String>()));
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if (this.record.get("commentMode")==null || this.record.get("commentMode").equals("")) this.record.put("commentMode", "2");
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}
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private void setKey(final String key) {
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if (key.length() > keyLength)
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this.key = key.substring(0, keyLength);
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this.key = key;
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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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public byte[] getSubject() {
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final String m = record.get("subject");
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if (m == null) return new byte[0];
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final byte[] b = Base64Order.enhancedCoder.decode(m, "de.anomic.data.blogBoard.subject()");
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if (b == null) return "".getBytes();
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return b;
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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 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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return DateFormatter.parseShortSecond(date);
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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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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", DateFormatter.formatShortSecond(date));
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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 DateFormatter.formatShortSecond();
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}
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return timestamp;
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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) return new byte[0];
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final byte[] b = Base64Order.enhancedCoder.decode(author, "de.anomic.data.blogBoard.author()");
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if (b == null) return "".getBytes();
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return b;
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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 int getCommentsSize() {
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// This ist a Bugfix for Version older than 4443.
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if(record.get("comments").startsWith(",")) {
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record.put("comments", record.get("comments").substring(1));
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writeBlogEntry(this);
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}
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final ArrayList<String> commentsize = listManager.string2arraylist(record.get("comments"));
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return commentsize.size();
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}
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public ArrayList<String> getComments() {
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final ArrayList<String> comments = listManager.string2arraylist(record.get("comments"));
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return comments;
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}
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private void setComments(final ArrayList<String> comments) {
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if (comments == null)
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record.put("comments", listManager.collection2string(new ArrayList<String>()));
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else
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record.put("comments", listManager.collection2string(comments));
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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) return "127.0.0.1";
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return ip;
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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 byte[] getPage() {
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final String page = record.get("page");
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if (page == null) return new byte[0];
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final byte[] page_as_byte = Base64Order.enhancedCoder.decode(page, "de.anomic.data.blogBoard.page()");
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if (page_as_byte == null) return "".getBytes();
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return page_as_byte;
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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 void addComment(final String commentID) {
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final ArrayList<String> comments = listManager.string2arraylist(record.get("comments"));
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comments.add(commentID);
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record.put("comments", listManager.collection2string(comments));
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}
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public boolean removeComment(final String commentID) {
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final ArrayList<String> comments = listManager.string2arraylist(record.get("comments"));
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final boolean success = comments.remove(commentID);
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record.put("comments", listManager.collection2string(comments));
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return success;
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}
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/**
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* returns the comment mode
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* 0 - no comments allowed
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* 1 - comments allowed
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* 2 - comments moderated
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* @return comment mode
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*/
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public int getCommentMode(){
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return Integer.parseInt(record.get("commentMode"));
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}
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private void setCommentMode(final String mode) {
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if (mode == null)
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record.put("commentMode", "2");
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else
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record.put("commentMode", mode);
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}
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public boolean isPublic() {
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final String privacy = record.get("privacy");
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if (privacy == null)
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return true;
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if(privacy.equalsIgnoreCase("public"))
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return true;
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return false;
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}
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}
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}
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