// Supporter.java
// (C) 2007 by Michael Peter Christen; mc@yacy.net, Frankfurt a. M., Germany
// first published 13.6.2007 on http://yacy.net
//
// This is a part of YaCy, a peer-to-peer based web search engine
//
// $LastChangedDate$
// $LastChangedRevision$
// $LastChangedBy$
//
// LICENSE
//
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; either version 2 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
import java.net.MalformedURLException;
import java.util.Date;
import java.util.HashMap;
import java.util.Iterator;
import net.yacy.cora.date.GenericFormatter;
import net.yacy.cora.document.encoding.ASCII;
import net.yacy.cora.document.encoding.UTF8;
import net.yacy.cora.document.id.DigestURL;
import net.yacy.cora.order.NaturalOrder;
import net.yacy.cora.protocol.RequestHeader;
import net.yacy.cora.sorting.ConcurrentScoreMap;
import net.yacy.cora.sorting.ScoreMap;
import net.yacy.cora.util.ConcurrentLog;
import net.yacy.kelondro.index.Row;
import net.yacy.kelondro.index.Row.Entry;
import net.yacy.peers.NewsDB;
import net.yacy.peers.NewsPool;
import net.yacy.peers.Seed;
import net.yacy.repository.Blacklist.BlacklistType;
import net.yacy.search.Switchboard;
import net.yacy.server.serverObjects;
import net.yacy.server.serverSwitch;
import net.yacy.utils.crypt;
import net.yacy.utils.nxTools;
public class Supporter {
public static serverObjects respond(final RequestHeader header, final serverObjects post, final serverSwitch env) {
final Switchboard sb = (Switchboard) env;
final serverObjects prop = new serverObjects();
final boolean authenticated = sb.adminAuthenticated(header) >= 2;
final int display = ((post == null) || (!authenticated)) ? 0 : post.getInt("display", 0);
prop.put("display", display);
final boolean showScore = ((post != null) && (post.containsKey("score")));
// access control
final boolean publicPage = sb.getConfigBool("publicSurftips", true);
final boolean authorizedAccess = sb.verifyAuthentication(header);
if ((publicPage) || (authorizedAccess)) {
// read voting
String hash;
if ((post != null) && ((hash = post.get("voteNegative", null)) != null)) {
if (!sb.verifyAuthentication(header)) {
prop.authenticationRequired();
return prop;
}
// make new news message with voting
if (!sb.isRobinsonMode()) {
final HashMap<String, String> map = new HashMap<String, String>();
map.put("urlhash", hash);
map.put("vote", "negative");
map.put("refid", post.get("refid", ""));
sb.peers.newsPool.publishMyNews(sb.peers.mySeed(), NewsPool.CATEGORY_SURFTIPP_VOTE_ADD, map);
}
}
if ((post != null) && ((hash = post.get("votePositive", null)) != null)) {
if (!sb.verifyAuthentication(header)) {
prop.authenticationRequired();
return prop;
}
// make new news message with voting
final HashMap<String, String> map = new HashMap<String, String>();
map.put("urlhash", hash);
map.put("url", crypt.simpleDecode(post.get("url", "")));
map.put("title", crypt.simpleDecode(post.get("title", "")));
map.put("description", crypt.simpleDecode(post.get("description", "")));
map.put("vote", "positive");
map.put("refid", post.get("refid", ""));
map.put("comment", post.get("comment", ""));
sb.peers.newsPool.publishMyNews(sb.peers.mySeed(), NewsPool.CATEGORY_SURFTIPP_VOTE_ADD, map);
}
// create Supporter
final HashMap<String, Integer> negativeHashes = new HashMap<String, Integer>(); // a mapping from an url hash to Integer (count of votes)
final HashMap<String, Integer> positiveHashes = new HashMap<String, Integer>(); // a mapping from an url hash to Integer (count of votes)
accumulateVotes(sb, negativeHashes, positiveHashes, NewsPool.INCOMING_DB);
//accumulateVotes(negativeHashes, positiveHashes, yacyNewsPool.OUTGOING_DB);
//accumulateVotes(negativeHashes, positiveHashes, yacyNewsPool.PUBLISHED_DB);
final ScoreMap<String> ranking = new ConcurrentScoreMap<String>(); // score cluster for url hashes
final Row rowdef = new Row("String url-255, String title-120, String description-120, String refid-" + (GenericFormatter.PATTERN_SHORT_SECOND.length() + 12), NaturalOrder.naturalOrder);
final HashMap<String, Entry> Supporter = new HashMap<String, Entry>(); // a mapping from an url hash to a kelondroRow.Entry with display properties
accumulateSupporter(sb, Supporter, ranking, rowdef, negativeHashes, positiveHashes, NewsPool.INCOMING_DB);
//accumulateSupporter(Supporter, ranking, rowdef, negativeHashes, positiveHashes, yacyNewsPool.OUTGOING_DB);
//accumulateSupporter(Supporter, ranking, rowdef, negativeHashes, positiveHashes, yacyNewsPool.PUBLISHED_DB);
// read out surftipp array and create property entries
final Iterator<String> k = ranking.keys(false);
int i = 0;
Row.Entry row;
String url, urlhash, refid, title, description;
boolean voted;
while (k.hasNext()) {
urlhash = k.next();
if (urlhash == null) continue;
row = Supporter.get(urlhash);
if (row == null) continue;
url = row.getPrimaryKeyUTF8().trim();
try {
if (Switchboard.urlBlacklist.isListed(BlacklistType.SURFTIPS, new DigestURL(url, urlhash.getBytes()))) continue;
} catch (final MalformedURLException e) {
continue;
}
title = row.getColUTF8(1);
description = row.getColUTF8(2);
if ((url == null) || (title == null) || (description == null)) continue;
refid = row.getColUTF8(3);
voted = (sb.peers.newsPool.getSpecific(NewsPool.OUTGOING_DB, NewsPool.CATEGORY_SURFTIPP_VOTE_ADD, "refid", refid) != null) ||
(sb.peers.newsPool.getSpecific(NewsPool.PUBLISHED_DB, NewsPool.CATEGORY_SURFTIPP_VOTE_ADD, "refid", refid) != null);
prop.put("supporter_results_" + i + "_authorized", authenticated ? "1" : "0");
prop.put("supporter_results_" + i + "_authorized_recommend", voted ? "0" : "1");
prop.put("supporter_results_" + i + "_authorized_recommend_urlhash", urlhash);
prop.put("supporter_results_" + i + "_authorized_recommend_refid", refid);
prop.put("supporter_results_" + i + "_authorized_recommend_url", crypt.simpleEncode(url, null, 'b'));
prop.putHTML("supporter_results_" + i + "_authorized_recommend_title", crypt.simpleEncode(title, null, 'b'));
prop.putHTML("supporter_results_" + i + "_authorized_recommend_description", crypt.simpleEncode(description, null, 'b'));
prop.put("supporter_results_" + i + "_authorized_recommend_display", display);
prop.put("supporter_results_" + i + "_authorized_recommend_showScore", showScore ? "1" : "0");
prop.put("supporter_results_" + i + "_authorized_urlhash", urlhash);
prop.put("supporter_results_" + i + "_url", url);
prop.put("supporter_results_" + i + "_urlname", nxTools.shortenURLString(url, 60));
prop.put("supporter_results_" + i + "_urlhash", urlhash);
prop.putHTML("supporter_results_" + i + "_title", (showScore) ? ("(" + ranking.get(urlhash) + ") " + title) : title);
prop.putHTML("supporter_results_" + i + "_description", description);
i++;
if (i >= 50) break;
}
prop.put("supporter_results", i);
prop.put("supporter", "1");
} else {
prop.put("supporter", "0");
}
return prop;
}
private static int timeFactor(final Date created) {
return (int) Math.max(0, 10 - ((System.currentTimeMillis() - created.getTime()) / 24 / 60 / 60 / 1000));
}
private static void accumulateVotes(final Switchboard sb, final HashMap<String, Integer> negativeHashes, final HashMap<String, Integer> positiveHashes, final int dbtype) {
final int maxCount = Math.min(1000, sb.peers.newsPool.size(dbtype));
NewsDB.Record record;
final Iterator<NewsDB.Record> recordIterator = sb.peers.newsPool.recordIterator(dbtype);
int j = 0;
while ((recordIterator.hasNext()) && (j++ < maxCount)) {
record = recordIterator.next();
if (record == null) continue;
if (record.category().equals(NewsPool.CATEGORY_SURFTIPP_VOTE_ADD)) {
final String urlhash = record.attribute("urlhash", "");
final String vote = record.attribute("vote", "");
final int factor = ((dbtype == NewsPool.OUTGOING_DB) || (dbtype == NewsPool.PUBLISHED_DB)) ? 2 : 1;
if (vote.equals("negative")) {
final Integer i = negativeHashes.get(urlhash);
if (i == null) negativeHashes.put(urlhash, Integer.valueOf(factor));
else negativeHashes.put(urlhash, Integer.valueOf(i.intValue() + factor));
}
if (vote.equals("positive")) {
final Integer i = positiveHashes.get(urlhash);
if (i == null) positiveHashes.put(urlhash, Integer.valueOf(factor));
else positiveHashes.put(urlhash, Integer.valueOf(i.intValue() + factor));
}
}
}
}
private static void accumulateSupporter(
final Switchboard sb,
final HashMap<String, Entry> Supporter, final ScoreMap<String> ranking, final Row rowdef,
final HashMap<String, Integer> negativeHashes, final HashMap<String, Integer> positiveHashes, final int dbtype) {
final int maxCount = Math.min(1000, sb.peers.newsPool.size(dbtype));
NewsDB.Record record;
final Iterator<NewsDB.Record> recordIterator = sb.peers.newsPool.recordIterator(dbtype);
int j = 0;
String url = "", urlhash;
Row.Entry entry;
int score = 0;
Integer vote;
Seed seed;
while ((recordIterator.hasNext()) && (j++ < maxCount)) {
record = recordIterator.next();
if (record == null) continue;
entry = null;
if ((record.category().equals(NewsPool.CATEGORY_PROFILE_UPDATE)) &&
((seed = sb.peers.getConnected(record.originator())) != null)) {
url = record.attribute("homepage", "");
if (url.length() < 12) continue;
entry = rowdef.newEntry(new byte[][]{
url.getBytes(),
url.getBytes(),
UTF8.getBytes(("Home Page of " + seed.getName())),
record.id().getBytes()
});
score = 1 + timeFactor(record.created());
}
if ((record.category().equals(NewsPool.CATEGORY_PROFILE_BROADCAST)) &&
((seed = sb.peers.getConnected(record.originator())) != null)) {
url = record.attribute("homepage", "");
if (url.length() < 12) continue;
entry = rowdef.newEntry(new byte[][]{
url.getBytes(),
url.getBytes(),
UTF8.getBytes(("Home Page of " + seed.getName())),
record.id().getBytes()
});
score = 1 + timeFactor(record.created());
}
// add/subtract votes and write record
if (entry != null) {
try {
urlhash = ASCII.String((new DigestURL(url)).hash());
} catch (final MalformedURLException e) {
urlhash = null;
}
if (urlhash == null)
try {
urlhash = ASCII.String((new DigestURL("http://" + url)).hash());
} catch (final MalformedURLException e) {
urlhash = null;
}
if (urlhash==null) {
ConcurrentLog.info("Supporter", "bad url '" + url + "' from news record " + record.toString());
continue;
}
if ((vote = negativeHashes.get(urlhash)) != null) {
score = Math.max(0, score - vote.intValue()); // do not go below zero
}
if ((vote = positiveHashes.get(urlhash)) != null) {
score += 2 * vote.intValue();
}
// consider double-entries
if (Supporter.containsKey(urlhash)) {
ranking.inc(urlhash, score);
} else {
ranking.set(urlhash, score);
Supporter.put(urlhash, entry);
}
}
}
}
}