/*
 *
 * Copyright (c) 1998 The Java Apache Project.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * 3. Every modification must be notified to the Java Apache Project
 *    and redistribution of the modified code without prior notification
 *    is not permitted in any form.
 *
 * 4. All advertising materials mentioning features or use of this
 *    software must display the following acknowledgment:
 *    "This product includes software developed by the Java Apache Project
 *    (http://java.apache.org/)."
 *
 * 5. The names "JetSpeed", "Apache JetSpeed" and "Apache JetSpeed
 *    Project" must not be used to endorse or promote products
 *    derived from this software without prior written permission.
 *
 * 6. Redistributions of any form whatsoever must retain the following
 *    acknowledgment:
 *    "This product includes software developed by the Java Apache Project
 *    (http://java.apache.org/)."
 *
 * THIS SOFTWARE IS PROVIDED BY THE JAVA APACHE PROJECT "AS IS" AND ANY
 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE JAVA APACHE PROJECT OR
 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 * OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 * License version 1.0
 *
 */

package org.apache.jetspeed.turbine.screens.portlets;


//jetspeed stuff.
import org.apache.jetspeed.*;
import org.apache.jetspeed.util.*;
import org.apache.jetspeed.portal.*;
import org.apache.jetspeed.portal.factory.*;
import org.apache.jetspeed.portal.portlets.*;
import org.apache.jetspeed.portal.portletmarkup.*;
import org.apache.ecs.*;

//servlet
import javax.servlet.*;
import javax.servlet.http.*;

//standard java stuff
import java.io.*;
import java.net.*;
import java.util.*;

//ecs support
import org.apache.ecs.*;
import org.apache.ecs.html.*;

//Turbine support
import org.apache.turbine.modules.*;
import org.apache.turbine.util.*;


/**
Servlet which renders a portlet

@author <A HREF="burton@apache.org">Kevin Burton</A>
@version $Id$
*/
public class PortletViewerScreen extends Screen {

    
    /*
    The following are excepted as HTTP parameters and are acted on:
    
    url:            The URL to be passed to the portlet config.
    classname:      The Class name of the portlet to be rendered
    */
    public ConcreteElement build( RunData rundata ) {

        HttpServletRequest request = rundata.getRequest();
        HttpServletResponse response = rundata.getResponse();
                                                                                             
        ElementContainer root = new ElementContainer();
        
        String classname = request.getParameter("classname");

        if (classname == null) {
            root.addElement( this.getClassName() );
            return null;
        }
        
        String url = request.getParameter("url");

        try {

            Portlet portlet = PortletFactory.getInstance( rundata ).getPortlet( classname, url, rundata );

            PortletControl control = PortletControlFactory.getInstance( portlet );
            
            control.setWidth( "100%" );
            
            PortletController pc = PortletControllerFactory.getInstance( control );

            root.addElement( pc.getContent() );

        } catch (PortletException e) {

            System.err.println("ERROR: Tried to render portlet: " + classname );
            System.err.println("ERROR: With the URL of: " + url );            

            e.printStackTrace();

            return null;
        }


        return root;

    }


    /**
    @author <A HREF="burton@apache.org">Kevin Burton</A>
    @version $Id$
    */
    public static String getURL( String classname, String url, RunData rundata ) {
        Entry entry = new Entry();
        entry.setClassname( classname );
        entry.setUrl( url );
        return getURL( entry, rundata );
    }
    
    /**
    Determine how to fetch a single portlet based on classname and url.  
    Everytime you want to view an individual Portlet you should call this method

    @author <A HREF="burton@apache.org">Kevin Burton</A>
    @version $Id$
    */
    public static String getURL( Entry entry, RunData rundata ) {
        
        DynamicURI uri = new DynamicURI( rundata, "portlets.PortletViewerScreen" );
    
        if (entry.getClassname() != null) {
            uri.addQueryData( "classname", entry.getClassname()  );
        }

        if (entry.getUrl() != null) {
            uri.addQueryData( "url", entry.getUrl() );
        }

        Parameter[] param = entry.getParameter();

        for (int i = 0; i < param.length; ++i ) {

            String name = param[i].getName();
            String value = param[i].getValue();

            if (value != null) {
                uri.addQueryData( name, value );
            }

        }
       
        return uri.toString();

    }
    
    /**
    @author <A HREF="burton@apache.org">Kevin Burton</A>
    @version $Id$
    */
    //FIX ME:  This should use ECS
    private ConcreteElement getUrlPrompt() {

        return  new P("The URL you specified is invalid.  Please specifiy another.")
                    .addElement( new Form() )
                        .addElement( new Input().setType("text").setName("url"))
                        .addElement( new BR() )
                        .addElement( new Input().setType("submit"));

    }


    private ConcreteElement getClassName() {

        return  new P("The ClassName you specified is invalid.  Please specifiy another.")
                    .addElement( new Form() )
                        .addElement( new Input().setType("text").setName("classname"))
                        .addElement( new BR() )
                        .addElement( new Input().setType("submit"));

    }
    
    

}