/* 
    P/P   *  Method: net.sourceforge.pebble.web.tagext.IsBlogPublisherTag__static_init
          */
     1  package net.sourceforge.pebble.web.tagext;
     2  
     3  import net.sourceforge.pebble.domain.AbstractBlog;
     4  import net.sourceforge.pebble.domain.Blog;
     5  import net.sourceforge.pebble.Constants;
     6  import net.sourceforge.pebble.util.SecurityUtils;
     7  
         /* 
    P/P   *  Method: void net.sourceforge.pebble.web.tagext.IsBlogPublisherTag()
          */
     8  import javax.servlet.jsp.tagext.TagSupport;
     9  import javax.servlet.jsp.JspException;
    10  import javax.servlet.http.HttpServletRequest;
    11  
    12  /**
    13   * A custom tag that includes its body content if the current user belongs to
    14   * the "blog publisher" role for the blog.
    15   *
    16   * @author    Simon Brown
    17   */
    18  public class IsBlogPublisherTag extends TagSupport {
    19  
    20    /**
    21     * Implementation from the Tag interface - this is called when the opening tag
    22     * is encountered.
    23     *
    24     * @return  an integer specifying what to do afterwards
    25     * @throws  javax.servlet.jsp.JspException    if something goes wrong
    26     */
           /* 
    P/P     *  Method: int doStartTag()
            * 
            *  Preconditions:
            *    this.pageContext != null
            * 
            *  Presumptions:
            *    javax.servlet.jsp.PageContext:getRequest(...)@28 != null
            * 
            *  Postconditions:
            *    return_value in 0..1
            */
    27    public int doStartTag() throws JspException {
    28      HttpServletRequest request = (HttpServletRequest)pageContext.getRequest();
    29      AbstractBlog abstractBlog = (AbstractBlog)request.getAttribute(Constants.BLOG_KEY);
    30  
    31      if (abstractBlog instanceof Blog) {
    32        Blog blog = (Blog)abstractBlog;
    33        if (SecurityUtils.isUserAuthorisedForBlogAsBlogPublisher(blog)) {
    34          return EVAL_BODY_INCLUDE;
    35        }
    36      }
    37  
    38      return SKIP_BODY;
    39    }
    40  
    41  }