source: main/trunk/greenstone3/src/java/org/greenstone/gsdl3/Library2.java@ 26458

/*
 *    Library2.java
 *    Copyright (C) 2002 New Zealand Digital Library, http://www.nzdl.org
 *
 *    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., 675 Mass Ave, Cambridge, MA 02139, USA.
 */
package org.greenstone.gsdl3;

import org.greenstone.gsdl3.core.*;
import org.greenstone.gsdl3.util.*;
import org.greenstone.util.GlobalProperties;

import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Node;

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.File;
import java.io.IOException;
import java.util.HashMap;
import java.util.Set;
import java.util.Iterator;

/**
 * A program to take cgi args from the command line and return html
 * 
 * @author Katherine Don
 * @version $Revision: 26454 $
 */

final public class Library2
{

    protected XMLConverter converter = null;
    protected Document doc = null;

    protected HashMap<String, String> saved_args = null;
    protected GSParams params = null;
    protected DefaultReceptionist recept = null;

    public Library2()
    {
        this.converter = new XMLConverter();
        this.doc = converter.newDOM();
        this.saved_args = new HashMap<String, String>();
        this.params = new GSParams();
        this.recept = new DefaultReceptionist();
    }

    public void configure(String site_name, String interface_name)
    {

        HashMap<String, Comparable> config_params = new HashMap<String, Comparable>();
        //config_params.put(GSConstants.GSDL3_HOME, gsdl_home);
        config_params.put(GSConstants.SITE_NAME, site_name);
        config_params.put(GSConstants.INTERFACE_NAME, interface_name);
        config_params.put(GSConstants.ALLOW_CLIENT_SIDE_XSLT, false);

        // new message router - create it and pass a handle to recept.
        // the servlet wont use this directly
        MessageRouter message_router = new MessageRouter();

        message_router.setSiteName(site_name);
        message_router.configure();
        // new receptionist
        recept.setConfigParams(config_params);
        recept.setMessageRouter(message_router);
        recept.setParams(params);
        recept.configure();
    }

    /*
     *  On Linux, run as:
     *  GS3> java -classpath "web/WEB-INF/lib/*":"lib/jni/*" org.greenstone.gsdl3.Library2 localsite default
     *  Press enter to accept the default cgi-args to pass in.
     * 
     *  For how to include all jars in a folder into the classpath to run a java program, see
     *  http://stackoverflow.com/questions/219585/setting-multiple-jars-in-java-classpath
     *  http://stackoverflow.com/questions/6780678/run-class-in-jar-file
     */
    public static void main(String args[])
    {

        if (args.length != 2)
        {
            System.out.println("Usage: Library2 <site name> <interface name>");
            System.exit(1);
        }

        // force GlobalProperties to default GSDL3HOME to GSDL3SRCHOME/web if not already set
        GlobalProperties.loadGlobalProperties("");

        Library2 library = new Library2();
        library.configure(args[0], args[1]);

        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        String query = null;
        String result = null;
        while (true)
        {
            System.out.println("Please enter the  cgi args (all on one line), or 'exit' to quit (default a=p&sa=home)");
            try
            {
                query = br.readLine();
            }
            catch (Exception e)
            {
                System.err.println("Library2 exception:" + e.getMessage());
            }
            if (query.startsWith("exit"))
            {
                System.exit(1);
            }

            result = library.process(query);

            System.out.println(result);

        }

    }

    protected String process(String query)
    {
        Element xml_message = generateRequest(query);
        System.out.println("*********************");
        System.out.println(converter.getPrettyString(xml_message));
        Node xml_result = recept.process(xml_message);
        return this.converter.getPrettyString(xml_result);
    }

    protected Element generateRequest(String cgiargs)
    {

        Element xml_message = this.doc.createElement(GSXML.MESSAGE_ELEM);
        Element xml_request = GSXML.createBasicRequest(this.doc, GSXML.REQUEST_TYPE_PAGE, "", new UserContext());
        xml_message.appendChild(xml_request);
        Element xml_param_list = this.doc.createElement(GSXML.PARAM_ELEM + GSXML.LIST_MODIFIER);
        xml_request.appendChild(xml_param_list);

        // the defaults
        String action = "p";
        String subaction = "home";
        String lang = saved_args.get(GSParams.LANGUAGE);
        if (lang == null)
        {
            lang = "en";
        }
        String output = "html";

        String args[] = cgiargs.split("&");
        for (int i = 0; i < args.length; i++)
        {
            String arg = args[i];
            int pos = arg.indexOf('=');
            if (pos == -1)
                continue;
            String name = arg.substring(0, pos);
            String value = arg.substring(pos + 1);
            if (name.equals(GSParams.ACTION))
            {
                action = value;
            }
            else if (name.equals(GSParams.SUBACTION))
            {
                subaction = (value);
            }
            else if (name.equals(GSParams.LANGUAGE))
            {
                lang = value;
                saved_args.put(name, value);
            }
            else if (name.equals(GSParams.OUTPUT))
            {
                output = value;
            }
            else if (params.shouldSave(name))
            {
                saved_args.put(name, value);
            }
            else
            {
                // make a param now
                Element param = doc.createElement(GSXML.PARAM_ELEM);
                param.setAttribute(GSXML.NAME_ATT, name);
                param.setAttribute(GSXML.VALUE_ATT, GSXML.xmlSafe(value));
                xml_param_list.appendChild(param);
            }
        }

        xml_request.setAttribute(GSXML.OUTPUT_ATT, output);
        xml_request.setAttribute(GSXML.ACTION_ATT, action);
        xml_request.setAttribute(GSXML.SUBACTION_ATT, subaction);
        xml_request.setAttribute(GSXML.LANG_ATT, lang);

        // put in all the params from the session cache
        Set<String> params = saved_args.keySet();
        Iterator<String> i = params.iterator();
        while (i.hasNext())
        {
            String name = i.next();
            if (name.equals(GSParams.LANGUAGE))
                continue;
            Element param = this.doc.createElement(GSXML.PARAM_ELEM);
            param.setAttribute(GSXML.NAME_ATT, name);
            param.setAttribute(GSXML.VALUE_ATT, GSXML.xmlSafe(saved_args.get(name)));
            xml_param_list.appendChild(param);
        }

        return xml_message;
    }
}