/*

  * Copyright (c) 2003-2011, Simon Brown

  * 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 Pebble 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.

  */

 package net.sourceforge.pebble.web.tagext;

 import net.sourceforge.pebble.Constants;

 import net.sourceforge.pebble.domain.Blog;

 import net.sourceforge.pebble.domain.AbstractBlog;

 import net.sourceforge.pebble.util.SecurityUtils;

 import javax.servlet.http.HttpServletRequest;

 import javax.servlet.jsp.JspException;

 import javax.servlet.jsp.tagext.TagSupport;

 /**

  * A custom tag that includes its body content if the current user belongs to

  * the "blog owner" role for the blog.

  *

  * @author    Simon Brown

  */

 public class IsBlogOwnerTag extends TagSupport {

   /**

    * Implementation from the Tag interface - this is called when the opening tag

    * is encountered.

    *

    * @return  an integer specifying what to do afterwards

    * @throws  JspException    if something goes wrong

    */

   public int doStartTag() throws JspException {

     HttpServletRequest request = (HttpServletRequest)pageContext.getRequest();

     AbstractBlog abstractBlog = (AbstractBlog)request.getAttribute(Constants.BLOG_KEY);

     if (abstractBlog instanceof Blog) {

       Blog blog = (Blog)abstractBlog;

       if (SecurityUtils.isUserAuthorisedForBlogAsBlogOwner(blog)) {

         return EVAL_BODY_INCLUDE;

       }

     }

     return SKIP_BODY;

   }

 }