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310 lines
11 KiB
310 lines
11 KiB
//wikiBoard.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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//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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//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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//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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package de.anomic.data.wiki;
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import java.io.File;
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import java.io.IOException;
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import java.text.ParseException;
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import java.text.SimpleDateFormat;
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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.Map;
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import java.util.TimeZone;
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import de.anomic.kelondro.blob.Heap;
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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.NaturalOrder;
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public class wikiBoard {
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public static final int keyLength = 64;
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private static final String dateFormat = "yyyyMMddHHmmss";
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static SimpleDateFormat SimpleFormatter = new SimpleDateFormat(dateFormat);
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static {
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SimpleFormatter.setTimeZone(TimeZone.getTimeZone("GMT"));
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}
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MapView datbase = null;
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MapView bkpbase = null;
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static HashMap<String, String> authors = new HashMap<String, String>();
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public wikiBoard( final File actpath, final File bkppath) throws IOException {
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new File(actpath.getParent()).mkdirs();
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if (datbase == null) {
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//datbase = new MapView(BLOBTree.toHeap(actpath, true, true, keyLength, recordSize, '_', NaturalOrder.naturalOrder, actpathNew), 500, '_');
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datbase = new MapView(new Heap(actpath, keyLength, NaturalOrder.naturalOrder, 1024 * 64), 500, '_');
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}
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new File(bkppath.getParent()).mkdirs();
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if (bkpbase == null) {
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//bkpbase = new MapView(BLOBTree.toHeap(bkppath, true, true, keyLength + dateFormat.length(), recordSize, '_', NaturalOrder.naturalOrder, bkppathNew), 500, '_');
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bkpbase = new MapView(new Heap(bkppath, keyLength + dateFormat.length(), NaturalOrder.naturalOrder, 1024 * 64), 500, '_');
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}
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}
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public int sizeOfTwo() {
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return datbase.size() + bkpbase.size();
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}
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public int size() {
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return datbase.size();
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}
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public void close() {
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datbase.close();
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bkpbase.close();
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}
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static String dateString() {
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return dateString(new Date());
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}
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public static String dateString(final Date date) {
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synchronized (SimpleFormatter) {
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return SimpleFormatter.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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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 static String guessAuthor(final String ip) {
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final String author = authors.get(ip);
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//yacyCore.log.logDebug("DEBUG: guessing author for ip = " + ip + " is '" + author + "', authors = " + authors.toString());
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return author;
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}
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public static void setAuthor(final String ip, final String author) {
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authors.put(ip,author);
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}
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public entry newEntry(final String subject, final String author, final String ip, final String reason, final byte[] page) throws IOException {
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return new entry(normalize(subject), author, ip, reason, page);
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}
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public class entry {
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String key;
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Map<String, String> record;
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public entry(final String subject, String author, String ip, String reason, final byte[] page) throws IOException {
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record = new HashMap<String, String>();
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key = subject;
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if (key.length() > keyLength) key = key.substring(0, keyLength);
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record.put("date", dateString());
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if ((author == null) || (author.length() == 0)) author = "anonymous";
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record.put("author", Base64Order.enhancedCoder.encode(author.getBytes("UTF-8")));
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if ((ip == null) || (ip.length() == 0)) ip = "";
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record.put("ip", ip);
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if ((reason == null) || (reason.length() == 0)) reason = "";
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record.put("reason", Base64Order.enhancedCoder.encode(reason.getBytes("UTF-8")));
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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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authors.put(ip, author);
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//System.out.println("DEBUG: setting author " + author + " for ip = " + ip + ", authors = " + authors.toString());
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}
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entry(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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}
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public String subject() {
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return key;
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}
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public Date date() {
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try {
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final String c = record.get("date");
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if (c == null) {
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System.out.println("DEBUG - ERROR: date field missing in wikiBoard");
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return new Date();
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}
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synchronized (SimpleFormatter) {
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return SimpleFormatter.parse(c);
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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 author() {
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final String a = record.get("author");
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if (a == null) return "anonymous";
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final byte[] b = Base64Order.enhancedCoder.decode(a);
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if (b == null) return "anonymous";
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return new String(b);
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}
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public String reason() {
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final String r = record.get("reason");
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if (r == null) return "";
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final byte[] b = Base64Order.enhancedCoder.decode(r);
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if (b == null) return "unknown";
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return new String(b);
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}
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public byte[] page() {
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final String m = record.get("page");
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if (m == null) return new byte[0];
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final byte[] b = Base64Order.enhancedCoder.decode(m);
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if (b == null) return "".getBytes();
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return b;
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}
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void setAncestorDate(final Date date) {
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record.put("bkp", dateString(date));
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}
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private Date getAncestorDate() {
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try {
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final String c = record.get("date");
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if (c == null) return null;
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synchronized (SimpleFormatter) {
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return SimpleFormatter.parse(c);
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}
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} catch (final ParseException e) {
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return null;
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}
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}
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/*
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public boolean hasAncestor() {
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Date ancDate = getAncestorDate();
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if (ancDate == null) return false;
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try {
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return bkpbase.has(key + dateString(ancDate));
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} catch (IOException e) {
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return false;
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}
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}
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*/
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public entry getAncestor() {
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final Date ancDate = getAncestorDate();
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if (ancDate == null) return null;
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return read(key + dateString(ancDate), bkpbase);
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}
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void setChild(final String subject) {
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record.put("child", Base64Order.enhancedCoder.encode(subject.getBytes()));
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}
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private String getChildName() {
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final String c = record.get("child");
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if (c == null) return null;
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final byte[] subject = Base64Order.enhancedCoder.decode(c);
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if (subject == null) return null;
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return new String(subject);
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}
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public boolean hasChild() {
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final String c = record.get("child");
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if (c == null) return false;
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final byte[] subject = Base64Order.enhancedCoder.decode(c);
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return (subject != null);
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}
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public entry getChild() {
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final String childName = getChildName();
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if (childName == null) return null;
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return read(childName, datbase);
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}
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}
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public String write(final entry page) {
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// writes a new page and returns key
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try {
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// first load the old page
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final entry oldEntry = read(page.key);
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// set the bkp date of the new page to the date of the old page
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final Date oldDate = oldEntry.date();
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page.setAncestorDate(oldDate);
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oldEntry.setChild(page.subject());
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// write the backup
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//System.out.println("key = " + page.key);
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//System.out.println("oldDate = " + oldDate);
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//System.out.println("record = " + oldEntry.record.toString());
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bkpbase.put(page.key + dateString(oldDate), oldEntry.record);
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// write the new page
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datbase.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 entry read(final String key) {
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return read(key, datbase);
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}
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entry read(String key, final MapView base) {
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try {
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key = normalize(key);
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if (key.length() > keyLength) key = key.substring(0, keyLength);
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final Map<String, String> record = base.get(key);
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if (record == null) return newEntry(key, "anonymous", "127.0.0.1", "New Page", "".getBytes());
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return new entry(key, record);
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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 entry readBkp(final String key) {
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return read(key, bkpbase);
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}
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/*
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public boolean has(String key) {
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try {
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return datbase.has(normalize(key));
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} catch (IOException e) {
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return false;
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}
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}
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*/
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public Iterator<byte[]> keys(final boolean up) throws IOException {
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return datbase.keys(up, false);
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}
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public Iterator<byte[]> keysBkp(final boolean up) throws IOException {
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return bkpbase.keys(up, false);
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}
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}
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