/**
    * This file Copyright (c) 2010-2015 Magnolia International
    * Ltd.  (http://www.magnolia-cms.com). All rights reserved.
    *
    *
    * This file is dual-licensed under both the Magnolia
    * Network Agreement and the GNU General Public License.
    * You may elect to use one or the other of these licenses.
    *
   * This file is distributed in the hope that it will be
   * useful, but AS-IS and WITHOUT ANY WARRANTY; without even the
   * implied warranty of MERCHANTABILITY or FITNESS FOR A
   * PARTICULAR PURPOSE, TITLE, or NONINFRINGEMENT.
   * Redistribution, except as permitted by whichever of the GPL
   * or MNA you select, is prohibited.
   *
   * 1. For the GPL license (GPL), you can redistribute and/or
   * modify this file under the terms of the GNU General
   * Public License, Version 3, as published by the Free Software
   * Foundation.  You should have received a copy of the GNU
   * General Public License, Version 3 along with this program;
   * if not, write to the Free Software Foundation, Inc., 51
   * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
   *
   * 2. For the Magnolia Network Agreement (MNA), this file
   * and the accompanying materials are made available under the
   * terms of the MNA which accompanies this distribution, and
   * is available at http://www.magnolia-cms.com/mna.html
   *
   * Any modifications to this file must keep this entire header
   * intact.
   *
   */
  package info.magnolia.module.blossom.view;
  
  import java.util.Map;
  import javax.jcr.Node;
  import javax.servlet.ServletContext;
  import javax.servlet.http.HttpServletRequest;
  
  import org.springframework.beans.factory.InitializingBean;
  import org.springframework.context.MessageSource;
  import org.springframework.context.MessageSourceAware;
  import org.springframework.util.ClassUtils;
  import org.springframework.web.context.ServletContextAware;
  import org.springframework.web.servlet.support.JstlUtils;
  import org.springframework.web.servlet.support.RequestContext;
  
  import info.magnolia.context.MgnlContext;
  import info.magnolia.module.blossom.render.RenderContext;
  import info.magnolia.rendering.context.RenderingContext;
  import info.magnolia.rendering.model.RenderingModel;
  import info.magnolia.rendering.renderer.ContextAttributeConfiguration;
  import info.magnolia.rendering.renderer.JspRenderer;
  import info.magnolia.rendering.template.RenderableDefinition;
  
  /**
   * Renders JSP templates.
   *
   * @since 1.0
   */
  public class JspTemplateViewRenderer extends JspRenderer implements ServletContextAware, MessageSourceAware, InitializingBean {
  
      private static final boolean jstlPresent = ClassUtils.isPresent(
              "javax.servlet.jsp.jstl.core.Config", TemplateViewResolver.class.getClassLoader());
  
      private ServletContext servletContext;
      private MessageSource messageSource;
  
      public void addContextAttribute(String name, Class<?> componentClass) {
          ContextAttributeConfiguration attributeConfiguration = new ContextAttributeConfiguration();
          attributeConfiguration.setName(name);
          attributeConfiguration.setComponentClass(componentClass);
          addContextAttribute(name, attributeConfiguration);
      }
  
      @Override
      protected void setupContext(Map<String, Object> ctx, Node content, info.magnolia.rendering.template.RenderableDefinition definition, info.magnolia.rendering.model.RenderingModel<?> model, Object actionResult) {
          super.setupContext(ctx, content, definition, model, actionResult);
          ctx.putAll(RenderContext.get().getModel());
      }
  
      @Override
      protected void onRender(Node content, info.magnolia.rendering.template.RenderableDefinition definition, RenderingContext renderingCtx, Map<String, Object> ctx, String templateScript) throws info.magnolia.rendering.engine.RenderException {
  
          if (jstlPresent) {
              HttpServletRequest request = MgnlContext.getWebContext().getRequest();
              if (this.messageSource != null) {
                  JstlUtils.exposeLocalizationContext(request, this.messageSource);
              } else {
                  JstlUtils.exposeLocalizationContext(new RequestContext(request, servletContext));
              }
          }
  
          super.onRender(content, definition, renderingCtx, ctx, templateScript);
      }
  
      @Override
      protected String resolveTemplateScript(Node content, RenderableDefinition definition, RenderingModel<?> model, String actionResult) {
         return RenderContext.get().getTemplateScript();
     }
 
     @Override
     public void setServletContext(ServletContext servletContext) {
         this.servletContext = servletContext;
     }
 
     @Override
     public void setMessageSource(MessageSource messageSource) {
         this.messageSource = messageSource;
     }
 
     @Override
     public void afterPropertiesSet() throws Exception {
         if (jstlPresent && this.messageSource != null) {
             this.messageSource = JstlUtils.getJstlAwareMessageSource(servletContext, this.messageSource);
         }
     }
 }