// Tables_p.java
// -----------------------
// (C) 2010 by Michael Peter Christen; mc@yacy.net
// first published 21.01.2010 in Frankfurt, Germany on http://yacy.net
//
// 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.io.IOException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.regex.Pattern;
import net.yacy.cora.document.encoding.UTF8;
import net.yacy.cora.protocol.HeaderFramework;
import net.yacy.cora.protocol.RequestHeader;
import net.yacy.cora.util.ConcurrentLog;
import net.yacy.cora.util.SpaceExceededException;
import net.yacy.kelondro.blob.Tables;
import net.yacy.search.Switchboard;
import net.yacy.server.serverObjects;
import net.yacy.server.serverSwitch;
public class Tables_p {
public static serverObjects respond(final RequestHeader header, final serverObjects post, final serverSwitch env) {
final Switchboard sb = (Switchboard) env;
final serverObjects prop = new serverObjects();
final String ext = header.get(HeaderFramework.CONNECTION_PROP_EXT, "");
//final boolean json = ext.equals("json");
final boolean xml = ext.equals("xml");
prop.put("showtable", 0);
prop.put("showedit", 0);
prop.put("showselection", 0);
String table = (post == null) ? null : post.get("table", null);
if (table != null && !sb.tables.hasHeap(table)) table = null;
// show table selection
int count = 0;
final Iterator<String> ti = sb.tables.iterator();
String tablename;
prop.put("showselection", 1);
while (ti.hasNext()) {
tablename = ti.next();
prop.put("showselection_tables_" + count + "_name", tablename);
prop.put("showselection_tables_" + count + "_selected", (table != null && table.equals(tablename)) ? 1 : 0);
count++;
}
prop.put("showselection_tables", count);
prop.put("showselection_pattern", "");
prop.put("showselection_reverse", 1);
if (post == null) return prop; // return rewrite properties
final String counts = post.get("count", null);
int maxcount = (counts == null || counts.equals("all")) ? Integer.MAX_VALUE : post.getInt("count", 10);
final boolean reverse = post.containsKey("reverse") ? post.getBoolean("reverse") : false;
prop.put("showselection_reverse", reverse ? 1 : 0);
final String pattern = post.get("search", "");
final Pattern matcher = (pattern.isEmpty() || pattern.equals(".*")) ? null : Pattern.compile(".*" + pattern + ".*");
prop.put("pattern", pattern);
// apply deletion requests
if (post.get("deletetable", "").length() > 0)
sb.tables.clear(table);
if (post.get("deleterows", "").length() > 0) {
for (final Map.Entry<String, String> entry: post.entrySet()) {
if (entry.getValue().startsWith("pk_")) try {
sb.tables.delete(table, entry.getValue().substring(3).getBytes());
} catch (final IOException e) {
ConcurrentLog.logException(e);
}
}
}
if (post.get("commitrow", "").length() > 0) {
final String pk = post.get("pk");
final Map<String, byte[]> map = new HashMap<String, byte[]>();
for (final Map.Entry<String, String> entry: post.entrySet()) {
if (entry.getKey().startsWith("col_")) {
map.put(entry.getKey().substring(4), entry.getValue().getBytes());
}
}
try {
sb.tables.update(table, pk.getBytes(), map);
} catch (final IOException e) {
ConcurrentLog.logException(e);
}
}
// generate table
prop.put("showtable", 0);
prop.put("showedit", 0);
if (table != null) {
List<String> columns = null;
try {
columns = sb.tables.columns(table);
} catch (final IOException e) {
ConcurrentLog.logException(e);
columns = new ArrayList<String>();
}
if (post.containsKey("editrow")) {
// check if we can find a key
String pk = null;
for (final Map.Entry<String, String> entry: post.entrySet()) {
if (entry.getValue().startsWith("pk_")) {
pk = entry.getValue().substring(3);
break;
}
}
try {
if (pk != null && sb.tables.has(table, pk.getBytes())) {
setEdit(sb, prop, table, pk, columns);
}
} catch (final IOException e) {
ConcurrentLog.logException(e);
} catch (final SpaceExceededException e) {
ConcurrentLog.logException(e);
}
} else if (post.containsKey("addrow")) try {
// get a new key
final String pk = UTF8.String(sb.tables.createRow(table));
setEdit(sb, prop, table, pk, columns);
} catch (final IOException e) {
ConcurrentLog.logException(e);
} catch (final SpaceExceededException e) {
ConcurrentLog.logException(e);
} else {
prop.put("showtable", 1);
prop.put("showtable_table", table);
// insert the columns
for (int i = 0; i < columns.size(); i++) {
prop.putHTML("showtable_columns_" + i + "_header", columns.get(i));
}
prop.put("showtable_columns", columns.size());
// insert all rows
try {
maxcount = Math.min(maxcount, sb.tables.size(table));
} catch (final IOException e) {
ConcurrentLog.logException(e);
maxcount = 0;
}
count = 0;
try {
final Iterator<Tables.Row> plainIterator = sb.tables.iterator(table, matcher, !reverse);
boolean dark = true;
prop.putXML("showtable_" + count + "_table", table); // only used in XML
byte[] cell;
while (plainIterator.hasNext() && count < maxcount) {
Tables.Row row = plainIterator.next();
if (row == null) continue;
// write table content
prop.put("showtable_list_" + count + "_dark", ((dark) ? 1 : 0) ); dark=!dark;
prop.put("showtable_list_" + count + "_pk", UTF8.String(row.getPK()));
prop.put("showtable_list_" + count + "_count", count);
prop.put("showtable_list_" + count + "_table", table); // tablename for edit link
String col;
if (xml) {
for (int i = 0; i < columns.size(); i++) {
col = columns.get(i);
cell = row.get(col);
prop.putXML("showtable_list_" + count + "_columns_" + i + "_cell", cell == null ? "" : UTF8.String(cell));
prop.putXML("showtable_list_" + count + "_columns_" + i + "_col", col);
}
} else {
for (int i = 0; i < columns.size(); i++) {
col = columns.get(i);
cell = row.get(col);
prop.putHTML("showtable_list_" + count + "_columns_" + i + "_cell", cell == null ? "" : UTF8.String(cell));
}
}
prop.put("showtable_list_" + count + "_columns", columns.size());
count++;
}
} catch (final IOException e) {
ConcurrentLog.logException(e);
}
prop.put("showtable_list", count);
prop.put("showtable_num", count);
}
}
// adding the peer address
//prop.put("address", sb.peers.mySeed().getPublicAddress(sb.peers.mySeed().getIP()));
// return rewrite properties
return prop;
}
private static void setEdit(final Switchboard sb, final serverObjects prop, final String table, final String pk, final List<String> columns) throws IOException, SpaceExceededException {
prop.put("showedit", 1);
prop.put("showedit_table", table);
prop.put("showedit_pk", pk);
final Tables.Row row = sb.tables.select(table, pk.getBytes());
if (row == null) return;
int count = 0;
byte[] cell;
for (final String col: columns) {
cell = row.get(col);
prop.put("showedit_list_" + count + "_key", col);
prop.put("showedit_list_" + count + "_value", cell == null ? "" : UTF8.String(cell));
count++;
}
prop.put("showedit_list", count);
}
}