// Steering.java
// -----------------------
// part of YaCy
// (C) by Michael Peter Christen; mc@yacy.net
// first published on http://www.anomic.de
// Frankfurt, Germany, 2004, 2005
//
// $LastChangedDate$
// $LastChangedRevision$
// $LastChangedBy$
//
// 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

// You must compile this file with
// javac -classpath .:../Classes SettingsAck_p.java
// if the shell's current path is HTROOT

import java.io.File;

import net.yacy.cora.protocol.Domains;
import net.yacy.cora.protocol.HeaderFramework;
import net.yacy.cora.protocol.RequestHeader;
import net.yacy.cora.util.ConcurrentLog;
import net.yacy.data.TransactionManager;
import net.yacy.kelondro.util.FileUtils;
import net.yacy.peers.operation.yacyRelease;
import net.yacy.search.Switchboard;
import net.yacy.server.serverObjects;
import net.yacy.server.serverSwitch;

public class Steering {

    public static serverObjects respond(final RequestHeader header, final serverObjects post, final serverSwitch ss) {
		if (post == null || post.isEmpty() || ss == null) {
			final serverObjects prop = new serverObjects();
			
	        /* For authenticated user only : acquire a transaction token to pass then to the Steering.html post action */
			if(ss != null && ((Switchboard) ss).verifyAuthentication(header)) {
				/* YaCyDefaultServlet will detect it and then also fill the custom HTTP response header used by the JavaScript shutdown and restart actions 
				 * or any external API requesting tool */
				prop.put(TransactionManager.TRANSACTION_TOKEN_PARAM, TransactionManager.getTransactionToken(header));
				/* Also add to the Steering.html page info block for eventual display of this page without parameter */
				prop.put("info_" + TransactionManager.TRANSACTION_TOKEN_PARAM, TransactionManager.getTransactionToken(header));
			} else {
	        	prop.authenticationRequired();
			}
	        
			return prop;
		}

        final Switchboard sb = (Switchboard) ss;
        final serverObjects prop = new serverObjects();
        prop.put("info", "0"); //no information submitted

        final String requestIP = post.get(HeaderFramework.CONNECTION_PROP_CLIENTIP, Domains.LOCALHOST);

        // handle access rights
        if (!sb.verifyAuthentication(header)) {
            ConcurrentLog.info("STEERING", "log-in attempt for steering from " + requestIP);
        	prop.authenticationRequired();
            return prop;
        }

        if (post.containsKey("shutdown")) {
        	TransactionManager.checkPostTransaction(header, post);
            ConcurrentLog.info("STEERING", "shutdown request from " + requestIP);
            sb.terminate(10, "shutdown request from Steering; ip = " + requestIP);
            prop.put("info", "3");

            return prop;
        }

        if (post.containsKey("restart")) {
        	TransactionManager.checkPostTransaction(header, post);
            ConcurrentLog.info("STEERING", "restart request from " + requestIP);
            yacyRelease.restart();
            prop.put("info", "4");

            return prop;
        }

        if (post.containsKey("update")) {
        	TransactionManager.checkPostTransaction(header, post);
            ConcurrentLog.info("STEERING", "update request from " + requestIP);
            final boolean devenvironment = new File(sb.getAppPath(), ".git").exists();
            final String releaseFileName = post.get("releaseinstall", "");
            final File releaseFile = new File(sb.releasePath, releaseFileName);
            if (FileUtils.isInDirectory(releaseFile, sb.releasePath)) {
                if ((!devenvironment) && (releaseFileName.length() > 0) && (releaseFile.exists())) {
                    if(yacyRelease.deployRelease(releaseFile)) {
                    	prop.put("info", "5");
                    	prop.putHTML("info_release", releaseFileName);
                    } else {
                    	prop.put("info", "7");
                    	prop.putHTML("info_release", releaseFileName);
                    }
                } else {
                	prop.put("info", "8");
                }
            } else {
                prop.put("info", "6");
            }

            return prop;
        }
        
        return prop;
    }

}
