source: trunk/gsdl3/src/java/org/greenstone/gsdl3/action/BuildAction.java@ 3513

package org.greenstone.gsdl3.action;

import org.greenstone.gsdl3.core.ModuleInterface;
import org.greenstone.gsdl3.util.*;
// XML classes
import org.w3c.dom.Node; 
import org.w3c.dom.NodeList; 
import org.w3c.dom.Document; 
import org.w3c.dom.Element; 

import java.util.HashMap;
import java.util.Map;
import java.util.Iterator;
import java.io.File;

public class BuildAction extends Action {
    

    public String process (Element message) {

    //find the stylesheet
    String stylesheet = GSFile.stylesheetFile(config_, "build.xsl");

    if (stylesheet==null) {
        return GSHTML.errorPage("build stylesheet not found!");
    }

    // create the return page tree
    Element page = doc_.createElement(GSXML.PAGE_ELEM);
    page.setAttribute(GSXML.LANG_ATT, message.getAttribute(GSXML.LANG_ATT));
    // add the lang stuff from message
    page.appendChild(doc_.importNode(GSXML.getChildByTagName(message, GSXML.TRANSLATION_ELEM), true));
    // add the system stuff from message
    page.appendChild(doc_.importNode(GSXML.getChildByTagName(message, GSXML.CONFIGURATION_ELEM), true));

    Element request = (Element)message.getElementsByTagName(GSXML.REQUEST_ELEM).item(0);
    String service_name = request.getAttribute(GSXML.SUBACTION_ATT); 
    
    // get the param list
    Element cgi_paramList = (Element)GSXML.getChildByTagName(request, GSXML.PARAM_ELEM+GSXML.LIST_MODIFIER);
    cgi_.toLong(cgi_paramList);
    HashMap params = GSXML.extractParams(cgi_paramList);

    // the first part of the data for the page is the cgi-params
    Element cgi_request = (Element)doc_.importNode(request, true);
    page.appendChild(cgi_request);

    // the second part of the page is the param list for the service
    // request the service info for the selected service - should be cached?
    
    Element mr_info_message = doc_.createElement(GSXML.MESSAGE_ELEM);
    Element mr_info_request = doc_.createElement(GSXML.REQUEST_ELEM);
    mr_info_message.appendChild(mr_info_request);
    mr_info_request.setAttribute(GSXML.TYPE_ATT, GSXML.REQUEST_TYPE_DESCRIBE);

    String to = "build"; // knwo this cos its build action - loaded by a cluster called build
    to = GSPath.appendLink(to, service_name);
    mr_info_request.setAttribute(GSXML.TO_ATT, to);

    Element mr_info_response = (Element) mr_.process(mr_info_message);
    System.err.println("describe response for service");
    System.err.println(converter_.getString(mr_info_response));
    Element description = doc_.createElement(GSXML.DESCRIPTION_ELEM);
    // just param list for now - may need content info too

    String path = GSXML.RESPONSE_ELEM;
    path = GSPath.appendLink(path, GSXML.SERVICE_ELEM);
    path = GSPath.appendLink(path, GSXML.PARAM_ELEM+GSXML.LIST_MODIFIER);

    Node pl = GSXML.getNodeByPath(mr_info_response, path);
    if (pl ==null) {
        System.out.println("pl is null");
    }
    else {
        System.out.println("pl name is "+pl.getNodeName());
    }
    Element imported_paramList = (Element)doc_.importNode(pl, true);
    // convert the name to short
    cgi_.addShortNames(imported_paramList);

    description.appendChild(imported_paramList);
    
    // for each param in page_request, set the current value if present
    //actually, prob dont need to know the default value, just which one to display - overwrite the default att?
    
    Element param = (Element)imported_paramList.getFirstChild();
    while (param !=null) {
        if (param.getNodeName().equals(GSXML.PARAM_ELEM)) { // just in case
        String name = param.getAttribute(GSXML.NAME_ATT);
        String current = (String)params.get(name);
        if (current !=null && !current.equals("")) {
            param.setAttribute(GSXML.DEFAULT_ATT, current);
        }
        }
        param = (Element)param.getNextSibling();
    }
    
    cgi_request.appendChild(description);
    
    // now see if we need to actually do anything - only if a colleciton has been set
    String collection = (String)params.get("collection");
    if (collection == null || collection.equals("")) {
        // no coll set - just output the form
        
        Document style_doc = converter_.getDOM(new File(stylesheet));
        GSXSLT.absoluteIncludePaths(style_doc, config_);
        return transformer_.transform(style_doc, page);       
    }
    
    // else do the request, output search box and results
    Element mr_query_message = doc_.createElement(GSXML.MESSAGE_ELEM);
    Element mr_query_request = doc_.createElement(GSXML.REQUEST_ELEM);
    mr_query_message.appendChild(mr_query_request);

    mr_query_request.setAttribute(GSXML.TYPE_ATT, GSXML.REQUEST_TYPE_BUILD);
    mr_query_request.setAttribute(GSXML.TO_ATT, to);

    // paramList
    Element paramList = doc_.createElement(GSXML.PARAM_ELEM+GSXML.LIST_MODIFIER);
    mr_query_request.appendChild(paramList);

    Iterator i = params.entrySet().iterator();
    while (i.hasNext()) {
        Map.Entry e = (Map.Entry)i.next();
        String name = cgi_.toLong((String)e.getKey());
        if (!name.equals("")) {
        String value = (String)e.getValue();
        // if (!name.equals("c")) {
        Element p = doc_.createElement(GSXML.PARAM_ELEM);
        p.setAttribute(GSXML.NAME_ATT, name);
        p.setAttribute(GSXML.VALUE_ATT, value);
        paramList.appendChild(p);
        // }
        }
    }
    
    Element mr_query_response = (Element)mr_.process(mr_query_message);

    // this result is a message
    Element result_response = (Element)GSXML.getChildByTagName(mr_query_response, GSXML.RESPONSE_ELEM);
    page.appendChild(doc_.importNode(result_response, true));

    Document style_doc = converter_.getDOM(new File(stylesheet));
    
    GSXSLT.absoluteIncludePaths(style_doc, config_);
    return transformer_.transform(style_doc, page);    
    }     
}