/* 
    P/P   *  Method: net.sourceforge.pebble.web.action.AdvancedSearchAction__static_init
          */
     1  /*
     2   * Copyright (c) 2003-2006, Simon Brown
     3   * All rights reserved.
     4   *
     5   * Redistribution and use in source and binary forms, with or without
     6   * modification, are permitted provided that the following conditions are met:
     7   *
     8   *   - Redistributions of source code must retain the above copyright
     9   *     notice, this list of conditions and the following disclaimer.
    10   *
    11   *   - Redistributions in binary form must reproduce the above copyright
    12   *     notice, this list of conditions and the following disclaimer in
    13   *     the documentation and/or other materials provided with the
    14   *     distribution.
    15   *
    16   *   - Neither the name of Pebble nor the names of its contributors may
    17   *     be used to endorse or promote products derived from this software
    18   *     without specific prior written permission.
    19   *
    20   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
    21   * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
    22   * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
    23   * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
    24   * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
    25   * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
    26   * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
    27   * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
    28   * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
    29   * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
    30   * POSSIBILITY OF SUCH DAMAGE.
    31   */
    32  package net.sourceforge.pebble.web.action;
    33  
    34  import net.sourceforge.pebble.Constants;
    35  import net.sourceforge.pebble.domain.Blog;
    36  import net.sourceforge.pebble.domain.Tag;
    37  import net.sourceforge.pebble.web.view.ForwardView;
    38  import net.sourceforge.pebble.web.view.View;
    39  
         /* 
    P/P   *  Method: void net.sourceforge.pebble.web.action.AdvancedSearchAction()
          */
    40  import javax.servlet.ServletException;
    41  import javax.servlet.http.HttpServletRequest;
    42  import javax.servlet.http.HttpServletResponse;
    43  import java.io.UnsupportedEncodingException;
    44  import java.net.URLEncoder;
    45  
    46  /**
    47   * Performs a search on the current blog.
    48   *
    49   * @author    Simon Brown
    50   */
    51  public class AdvancedSearchAction extends Action {
    52  
    53    /**
    54     * Peforms the processing associated with this action.
    55     *
    56     * @param request  the HttpServletRequest instance
    57     * @param response the HttpServletResponse instance
    58     * @return the name of the next view
    59     */
    60    public View process(HttpServletRequest request, HttpServletResponse response) throws ServletException {
             /* 
    P/P       *  Method: View process(HttpServletRequest, HttpServletResponse)
              * 
              *  Preconditions:
              *    request != null
              * 
              *  Presumptions:
              *    javax.servlet.http.HttpServletRequest:getAttribute(...)@61 != null
              *    javax.servlet.http.HttpServletRequest:getParameterValues(...).length@66 <= 232-1
              *    s.length@71 <= 232-1
              *    s[i]@71 != null
              * 
              *  Postconditions:
              *    return_value == &new ForwardView(process#2)
              *    new ForwardView(process#2) num objects == 1
              *    return_value.uri != null
              * 
              *  Test Vectors:
              *    javax.servlet.http.HttpServletRequest:getParameter(...)@69: Addr_Set{null}, Inverse{null}
              */
    61      Blog blog = (Blog)request.getAttribute(Constants.BLOG_KEY);
    62      StringBuffer query = new StringBuffer();
    63  
    64      addTerm(query, "title", request.getParameter("title"));
    65      addTerm(query, "body", request.getParameter("body"));
    66      addTerms(query, "category", request.getParameterValues("category"));
    67      addTerm(query, "author", request.getParameter("author"));
    68  
    69      String tags = request.getParameter("tags");
    70      if (tags != null) {
    71        String s[] = tags.split(",");
    72        for (int i = 0; i < s.length; i++) {
    73          s[i] = Tag.encode(s[i].trim());
    74        }
    75        addTerms(query, "tag", s);
    76      }
    77  
    78      try {
    79        String encodedQuery = URLEncoder.encode(query.toString(), blog.getCharacterEncoding());
    80        return new ForwardView("/search.action?query=" + encodedQuery);
    81      } catch (UnsupportedEncodingException uee) {
    82        throw new ServletException(uee);
    83      }
    84    }
    85  
           /* 
    P/P     *  Method: void addTerm(StringBuffer, String, String)
            * 
            *  Preconditions:
            *    (soft) query != null
            * 
            *  Test Vectors:
            *    value: Addr_Set{null}, Inverse{null}
            *    java.lang.String:length(...)@87: {0}, {1..232-1}
            *    java.lang.StringBuffer:length(...)@88: {-231..0}, {1..232-1}
            */
    86    private void addTerm(StringBuffer query, String key, String value) {
    87      if (value != null && value.trim().length() > 0) {
    88        if (query.length() > 0) {
    89          query.append(" AND ");
    90        }
    91        query.append(key + ":" + value.trim());
    92      }
    93    }
    94  
           /* 
    P/P     *  Method: void addTerms(StringBuffer, String, String[])
            * 
            *  Preconditions:
            *    (soft) query != null
            *    (soft) terms.length <= 232-1
            *    (soft) init'ed(terms[...])
            * 
            *  Test Vectors:
            *    terms: Addr_Set{null}, Inverse{null}
            */
    95    private void addTerms(StringBuffer query, String key, String terms[]) {
    96      if (terms != null) {
    97        for (int i = 0; i < terms.length; i++) {
    98          addTerm(query, key, terms[i]);
    99        }
   100      }
   101    }
   102  
   103  }