package org.hisp.dhis.webapi.service;

/*
 * Copyright (c) 2004-2016, University of Oslo
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 * Redistributions of source code must retain the above copyright notice, this
 * list of conditions and the following disclaimer.
 *
 * 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.
 * Neither the name of the HISP project nor the names of its contributors may
 * be used to endorse or promote products derived from this software without
 * specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
 * ANY EXPRESS 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 COPYRIGHT OWNER OR 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.
 */

import org.hisp.dhis.render.RenderService;
import org.hisp.dhis.dxf2.webmessage.WebMessage;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.MediaType;
import org.springframework.stereotype.Service;
import org.springframework.util.StringUtils;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

/**
 * WebMessage service methods.
 *
 * @author Morten Olav Hansen <mortenoh@gmail.com>
 */
@Service
public class WebMessageService
{
    @Autowired
    private RenderService renderService;

    public void sendJson( WebMessage message, HttpServletResponse response )
    {
        response.setContentType( MediaType.APPLICATION_JSON_VALUE );
        response.setStatus( message.getHttpStatusCode() );

        try
        {
            renderService.toJson( response.getOutputStream(), message );
        }
        catch ( IOException ignored )
        {
        }
    }

    public void sendXml( WebMessage message, HttpServletResponse response )
    {
        response.setContentType( MediaType.APPLICATION_XML_VALUE );
        response.setStatus( message.getHttpStatusCode() );

        try
        {
            renderService.toXml( response.getOutputStream(), message );
        }
        catch ( IOException ignored )
        {
        }
    }

    public void send( WebMessage webMessage, HttpServletResponse response, HttpServletRequest request )
    {
        String type = request.getHeader( "Accept" );
        type = !StringUtils.isEmpty( type ) ? type : request.getContentType();
        type = !StringUtils.isEmpty( type ) ? type : MediaType.APPLICATION_JSON_VALUE;

        // allow type to be overridden by path extension
        if ( request.getPathInfo().endsWith( ".json" ) )
        {
            type = MediaType.APPLICATION_JSON_VALUE;
        }
        else if ( request.getPathInfo().endsWith( ".xml" ) )
        {
            type = MediaType.APPLICATION_XML_VALUE;
        }

        if ( isCompatibleWith( type, MediaType.APPLICATION_JSON ) )
        {
            sendJson( webMessage, response );
        }
        else if ( isCompatibleWith( type, MediaType.APPLICATION_XML ) )
        {
            sendXml( webMessage, response );
        }
        else
        {
            sendJson( webMessage, response ); // default to json
        }
    }

    private boolean isCompatibleWith( String type, MediaType mediaType )
    {
        try
        {
            return !StringUtils.isEmpty( type ) && MediaType.parseMediaType( type ).isCompatibleWith( mediaType );
        }
        catch ( Exception ignored )
        {
        }

        return false;
    }
}

@@ -1615,140 +1615,230 @@
 his.
-render.RenderService;%0Aimport org.hisp.dhis.dxf2.webmessage.WebMessage;%0Aimport org.springframework.beans.factory.annotation.Autowired
+dxf2.webmessage.WebMessage;%0Aimport org.hisp.dhis.render.RenderService;%0Aimport org.springframework.beans.factory.annotation.Autowired;%0Aimport org.springframework.http.CacheControl;%0Aimport org.springframework.http.HttpStatus
 ;%0Aim
@@ -3374,16 +3374,426 @@
 N_VALUE;
+%0A        HttpStatus httpStatus = HttpStatus.valueOf( webMessage.getHttpStatusCode() );%0A%0A        if ( httpStatus.is4xxClientError() %7C%7C httpStatus.is5xxServerError() )%0A        %7B%0A            System.err.println( %22Setting cache control: %22 + CacheControl.noCache().cachePrivate().getHeaderValue() );%0A            response.setHeader( %22Cache-Control%22, CacheControl.noCache().cachePrivate().getHeaderValue() );%0A        %7D
 %0A%0A      

set cache-control for 4xx/5xx web messages