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Diff for /loncom/interface/lonsearchcat.pm between versions 1.3 and 1.98

version 1.3, 2001/03/08 16:45:22 version 1.98, 2001/08/26 21:19:35
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 # The LearningOnline Network  # The LearningOnline Network with CAPA
   #
 # Search Catalog  # Search Catalog
 #  #
   # YEAR=2001
 # 03/08/2001 Scott Harrison  # 03/08/2001 Scott Harrison
   # Scott Harrison: 03/12/2001, 03/13/2001, 03/14/2001, 03/15/2001, 03/19/2001
   # Scott Harrison: 03/20/2001, 03/21/2001, 03/22/2001, 03/26/2001, 03/27/2001
   # Scott Harrison: 04/02/2001, 08/15/2001, 08/24/2001, 08/25/2001
   
   ###############################################################################
   ##                                                                           ##
   ## ORGANIZATION OF THIS PERL MODULE                                          ##
   ##                                                                           ##
   ## 1. Description of functions                                               ##
   ## 2. Modules used by this module                                            ##
   ## 3. Choices for different output views (detailed, summary, xml, etc)       ##
   ## 4. BEGIN block (to be run once after compilation)                         ##
   ## 5. Handling routine called via Apache and mod_perl                        ##
   ## 6. Other subroutines                                                      ##
   ##                                                                           ##
   ###############################################################################
   
   # ---------------------------------------------------- Description of functions
   #
   #
   # === WEB HANDLER FUNCTIONS
   # BEGIN() : run once after compilation to initialize values
   # handler(server reference) : interacts with the Apache server layer
   #                             (for /adm/searchcat URLs)
   # get_unprocessed_cgi() : reads in critical name/value pairs that may have not
   #                         been processed and passed into %ENV by the web server
   # make_persistent() : makes a set of hidden HTML fields to make
   #                     SQL search interface information to be persistent
   #
   #
   # === WEB INTERFACE COMPONENT FUNCTIONS
   # simpletextfield(name,value) : returns HTML formatted string for simple text
   #                               field
   # simplecheckbox(name,value) : returns HTML formatted string for simple
   #                              checkbox
   # searchphrasefield(title,name,value) : returns HTML formatted string for
   #                                       a search expression phrase field
   # dateboxes(name, defaultmonth, defaultday, defaultyear) : returns HTML
   #                                                          formatted string
   #                                                          for a calendar date
   # selectbox(title,name,value,%HASH=options) : returns HTML formatted string for
   #                                             a selection box field
   #
   #
   # === SEARCH FUNCTIONS
   # advancedsearch(server reference, environment reference) : perform a complex
   #                                  multi-field logical query
   # basicsearch(server reference, environment reference) : perform a simple
   #                               single-field logical query
   # build_SQL_query(field name, logic) : builds a SQL query string from a
   #                                      logical expression with AND/OR keywords
   # build_custommetadata_query(field_name, logic_statement) : builds a perl
   #                 regular expression from a logical expression with AND/OR
   #                 keywords
   # recursive_SQL_query_build(field name, reverse notation expression) : 
   #                 builds a SQL query string from a reverse notation expression
   #                 logical expression with AND/OR keywords
   # build_date_queries(cmonth1, cday1, cyear1, cmonth2, cday2, cyear2,
   #                    lmonth1, lday1, lyear1, lmonth2, lday2, lyear2) :
   #                 Builds a SQL logic query to check time/date entries.
 #  #
   #
   # === OUTPUTTING RESULTS FUNCTION
   # output_results(output mode,
   #                server reference, 
   #                environment reference,
   #                reply list reference) : outputs results from search
   #
   #
   # === DIFFERENT WAYS TO VIEW METADATA RECORDS
   # detailed_citation_view(ORDERED METADATA LIST FOR A RESULT OBJECT INSTANCE) :
   #          see metadata viewing notes below 
   # summary_view(ORDERED METADATA LIST FOR A RESULT OBJECT INSTANCE) :
   #          see metadata viewing notes below 
   # fielded_format_view(ORDERED METADATA LIST FOR A RESULT OBJECT INSTANCE) :
   #          see metadata viewing notes below 
   # xml_sgml_view(ORDERED METADATA LIST FOR A RESULT OBJECT INSTANCE) :
   #          see metadata viewing notes below 
   #  ___________________________________________________________________________
   # | * Metadata viewing notes                                                  |
   # | Output is a HTML-ified string.                                            |
   # | Input arguments are title, author, subject, url, keywords, version, notes,|
   # | short abstract, mime, language, creation date, last revision date, owner, |
   # | copyright, hostname, httphost, and extra custom metadata to show.         |
   #  ---------------------------------------------------------------------------
   #
   #
   # === TEST CONDITIONAL FUNCTIONS
   # filled(field) : determines whether a given field has been filled
   #
   #
   # === ERROR FUNCTIONS
   # output_blank_field_error(server reference) : outputs a message saying that
   #                                              more fields need to be filled in
   # output_date_error(server reference, error message) : outputs
   #         an error message specific to bad date format.
   
 package Apache::lonsearchcat;  package Apache::lonsearchcat;
   
   # ------------------------------------------------- modules used by this module
 use strict;  use strict;
 use Apache::Constants qw(:common);  use Apache::Constants qw(:common);
   use Apache::lonnet();
   use Apache::File();
   use CGI qw(:standard);
   use Text::Query;
   
   # ---------------------------------------- variables used throughout the module
   
   # -- information holders
   my %language; # holds contents of language.tab
   my %cprtag; # holds contents of copyright.tab
   my %mimetag; # holds contents of filetypes.tab
   my %hostdomains; # matches host name to host domain
   my %hostips; # matches host name to host ip
   my %hitcount; # stores number of hits per host
   
   # -- dynamically rendered interface components
   my $closebutton; # button that closes the search window
   my $importbutton; # button to take the selected results and go to group sorting
   
   # -- miscellaneous variables
   my $scrout; # string that holds portions of the screen output
   my $fnum; # search result counter
   my $yourself; # allows for quickly limiting to oneself
   
   # ------------------------------------------ choices for different output views
   # Detailed Citation View ---> sub detailed_citation_view
   # Summary View ---> sub summary_view
   # Fielded Format ---> sub fielded_format_view
   # XML/SGML ---> sub xml_sgml_view
   my $basicviewselect=<<END;
   <select name='basicviewselect'>
   <option value='Detailed Citation View'>Detailed Citation View</option>
   <option value='Summary View'>Summary View</option>
   <option value='Fielded Format'>Fielded Format</option>
   <option value='XML/SGML'>XML/SGML</option>
   </select>
   END
   my $advancedviewselect=<<END;
   <select name='advancedviewselect'>
   <option value='Detailed Citation View'>Detailed Citation View</option>
   <option value='Summary View'>Summary View</option>
   <option value='Fielded Format'>Fielded Format</option>
   <option value='XML/SGML'>XML/SGML</option>
   </select>
   END
   
 my %language;  # ----------------------------------------------------------------------- BEGIN
 my $scrout;  sub BEGIN {
 my %metadatafields;  # --------------------------------- Compute various listings of metadata values
 my %cprtag;  
 my %mimetag;  
   
 sub handler {  
     my $r = shift;  
     $r->content_type('text/html');  
     $r->send_http_header;  
     return OK if $r->header_only;  
   
     %metadatafields=();  
   
 # ------------------------------------------------ First, check out environment  
     $metadatafields{'owner'}=$ENV{'user.name'}.'@'.$ENV{'user.domain'};  
   
       
     %language=();  
     $language{'any'}='Any language';      $language{'any'}='Any language';
     {      {
  my $fh=Apache::File->new($r->dir_config('lonTabDir').'/language.tab');   my $fh=Apache::File->new($Apache::lonnet::perlvar{'lonTabDir'}.
    '/language.tab');
  map {   map {
     $_=~/(\w+)\s+([\w\s\-]+)/;      $_=~/(\w+)\s+([\w\s\-]+)/; chomp;
     $language{$1}=$2;      $language{$1}=$2;
  } <$fh>;   } <$fh>;
     }      }
   
     %cprtag=();  
     $cprtag{'any'}='Any copyright/distribution';      $cprtag{'any'}='Any copyright/distribution';
     {      {
  my $fh=Apache::File->new($r->dir_config('lonIncludes').'/copyright.tab');   my $fh=Apache::File->new($Apache::lonnet::perlvar{'lonIncludes'}.
    '/copyright.tab');
  map {   map {
     $_=~/(\w+)\s+([\w\s\-]+)/;      $_=~/(\w+)\s+([\w\s\-]+)/; chomp;
     $cprtag{$1}=$2;      $cprtag{$1}=$2;
  } <$fh>;   } <$fh>;
     }      }
   
     %mimetag=();  
     $mimetag{'any'}='Any type';      $mimetag{'any'}='Any type';
     {      {
  my $fh=Apache::File->new($r->dir_config('lonTabDir').'/filetypes.tab');   my $fh=Apache::File->new($Apache::lonnet::perlvar{'lonTabDir'}.
    '/filetypes.tab');
  map {   map {
     $_=~/(\w+)\s+(\w+)\s+([\w\s\-]+)/;      $_=~/(\w+)\s+(\w+)\s+([\w\s\-]+)/; chomp;
     $mimetag{$1}=".$1 $3";      $mimetag{$1}=".$1 $3";
  } <$fh>;   } <$fh>;
     }      }
       {
    my $fh=Apache::File->new($Apache::lonnet::perlvar{'lonTabDir'}.
    '/hosts.tab');
    map {
       $_=~/(\w+?)\:(\w+?)\:(\w+?)\:(.*)/; chomp;
       if ($3 eq 'library') {
    $hostdomains{$1}=$2;
    $hostips{$1}=$4;
       }
    } <$fh>;
       }
   }
   
   # ----------------------------- Handling routine called via Apache and mod_perl
   sub handler {
       my $r = shift;
   
       &get_unprocessed_cgi();
   
       $r->content_type('text/html');
       $r->send_http_header;
       return OK if $r->header_only;
   
   # ----------------------------------- configure dynamic components of interface
       my $hidden='';
       if ($ENV{'form.catalogmode'} eq 'interactive') {
    $hidden="<input type='hidden' name='catalogmode' value='interactive'>".
       "\n";
           $closebutton="<input type='button' name='close' value='CLOSE' ".
       "onClick='self.close()'>"."\n";
       }
       elsif ($ENV{'form.catalogmode'} eq 'groupsearch') {
    $hidden=<<END;
   <input type='hidden' name='catalogmode' value='groupsearch'>
   END
           $closebutton=<<END;
   <input type='button' name='close' value='CLOSE' onClick='self.close()'>
   END
           $importbutton=<<END;
   <input type='button' name='import' value='IMPORT'
   onClick='javascript:select_group()'>
   END
       }
   
   # ------------------------------------------------------ Determine current user
       $yourself=$ENV{'user.name'}.'@'.$ENV{'user.domain'};
   
     $scrout="";  # --- Now, depending on the interface actions, do one of three things here:
   # --- 1. a basic search
   # --- 2. an advanced search
   # --- 3. output a search interface
   
   # ----------------------------------- See if a search invocation should be done
       if ($ENV{'form.basicsubmit'} eq 'SEARCH') {
    return &basicsearch($r,\%ENV);
       }
       elsif ($ENV{'form.advancedsubmit'} eq 'SEARCH') {
    return &advancedsearch($r,\%ENV);
       }
   
   # ----------------------------- Else, begin building search interface to output
       $scrout=''; # building a part of screen output
     $scrout.=&searchphrasefield('Limit by title','title',      $scrout.=&searchphrasefield('Limit by title','title',
  '');   $ENV{'form.title'});
   
     $scrout.=&searchphrasefield('Limit by author','author',      $scrout.=&searchphrasefield('Limit by author','author',
  '');   $ENV{'form.author'});
   
     $scrout.=&searchphrasefield('Limit by subject','subject',      $scrout.=&searchphrasefield('Limit by subject','subject',
  '');   $ENV{'form.subject'});
   
       $scrout.=&searchphrasefield('Limit by keywords','keywords',
    $ENV{'form.keywords'});
   
       $scrout.=&searchphrasefield('Limit by URL','url',
    $ENV{'form.url'});
   
   #    $scrout.=&searchphrasefield('Limit by version','version',
   # $ENV{'form.version'});
   
     $scrout.=&searchphrasefield('Limit by notes','notes',      $scrout.=&searchphrasefield('Limit by notes','notes',
  '');   $ENV{'form.notes'});
   
     $scrout.=&searchphrasefield('Limit by abstract','abstract',      $scrout.=&searchphrasefield('Limit by abstract','abstract',
  '');   $ENV{'form.abstract'});
   
       $ENV{'form.mime'}='notxxx' unless length($ENV{'form.mime'});
     $scrout.=&selectbox('Limit by MIME type','mime',      $scrout.=&selectbox('Limit by MIME type','mime',
  'notxxx',%mimetag);   $ENV{'form.mime'},%mimetag);
   
       $ENV{'form.language'}='any' unless length($ENV{'form.language'});
   
     $scrout.=&selectbox('Limit by language','language',      $scrout.=&selectbox('Limit by language','language',
  'any',%language);   $ENV{'form.language'},%language);
           
     $scrout.=<<CREATIONDATEEND;  
   # ------------------------------------------------ Compute date selection boxes
       $scrout.=<<CREATIONDATESTART;
 <p>  <p>
 <font color="#800000" face="helvetica"><b>LIMIT BY CREATION DATE RANGE:</b>  <font color="#800000" face="helvetica"><b>LIMIT BY CREATION DATE RANGE:</b>
 </font>  </font>
 <br>  <br />
 between:<select name="creationdatemonthstart">  between:
 <option value="01"> </option>  CREATIONDATESTART
 <option value="01">January</option>      $scrout.=&dateboxes('creationdatestart',1,1,1976,
 <option value="02">February</option>   $ENV{'form.creationdatestart_month'},
 <option value="03">March</option>   $ENV{'form.creationdatestart_day'},
 <option value="04">April</option>   $ENV{'form.creationdatestart_year'},
 <option value="05">May</option>   );
 <option value="06">June</option>      $scrout.=<<CREATIONDATEEND;
 <option value="07">July</option>  and:
 <option value="08">August</option>  
 <option value="09">September</option>  
 <option value="10">October</option>  
 <option value="11">November</option>  
 <option value="12">December</option>  
 </select>  
 <select name="creationdatedaystart">  
 <option value="1"> </option>  
 <option value=1>1</option>  
 <option value=2>2</option>  
 <option value=3>3</option>  
 <option value=4>4</option>  
 <option value=5>5</option>  
 <option value=6>6</option>  
 <option value=7>7</option>  
 <option value=8>8</option>  
 <option value=9>9</option>  
 <option value=10>10</option>  
 <option value=11>11</option>  
 <option value=12>12</option>  
 <option value=13>13</option>  
 <option value=14>14</option>  
 <option value=15>15</option>  
 <option value=16>16</option>  
 <option value=17>17</option>  
 <option value=18>18</option>  
 <option value=19>19</option>  
 <option value=20>20</option>  
 <option value=21>21</option>  
 <option value=22>22</option>  
 <option value=23>23</option>  
 <option value=24>24</option>  
 <option value=25>25</option>  
 <option value=26>26</option>  
 <option value=27>27</option>  
 <option value=28>28</option>  
 <option value=29>29</option>  
 <option value=30>30</option>  
 <option value=31>31</option>  
 </select>  
 <select name="creationdateyearstart">  
 <option value=1976> </option>  
 <option value=1976>1976</option>  
 <option value=1977>1977</option>  
 <option value=1978>1978</option>  
 <option value=1979>1979</option>  
 <option value=1980>1980</option>  
 <option value=1981>1981</option>  
 <option value=1982>1982</option>  
 <option value=1983>1983</option>  
 <option value=1984>1984</option>  
 <option value=1985>1985</option>  
 <option value=1986>1986</option>  
 <option value=1987>1987</option>  
 <option value=1988>1988</option>  
 <option value=1989>1989</option>  
 <option value=1990>1990</option>  
 <option value=1991>1991</option>  
 <option value=1992>1992</option>  
 <option value=1993>1993</option>  
 <option value=1994>1994</option>  
 <option value=1995>1995</option>  
 <option value=1996>1996</option>  
 <option value=1997>1997</option>  
 <option value=1998>1998</option>  
 <option value=1999>1999</option>  
 <option value=2000>2000</option>  
 <option value=2001>2001</option>  
 <option value=2002>2002</option>  
 <option value=2003>2003</option>  
 <option value=2004>2004</option>  
 <option value=2005>2005</option>  
 <option value=2006>2006</option>  
 <option value=2007>2007</option>  
 <option value=2008>2008</option>  
 <option value=2009>2009</option>  
 <option value=2010>2010</option>  
 <option value=2011>2011</option>  
 <option value=2012>2012</option>  
 <option value=2013>2013</option>  
 <option value=2014>2014</option>  
 <option value=2015>2015</option>  
 <option value=2016>2016</option>  
 <option value=2017>2017</option>  
 <option value=2018>2018</option>  
 <option value=2019>2019</option>  
 <option value=2020>2020</option>  
 <option value=2021>2021</option>  
 <option value=2022>2022</option>  
 <option value=2023>2023</option>  
 <option value=2024>2024</option>  
 <option value=2025>2025</option>  
 <option value=2026>2026</option>  
 <option value=2027>2027</option>  
 <option value=2028>2028</option>  
 <option value=2029>2029</option>  
 <option value=2030>2030</option>  
 <option value=2031>2031</option>  
 <option value=2032>2032</option>  
 <option value=2033>2033</option>  
 <option value=2034>2034</option>  
 <option value=2035>2035</option>  
 <option value=2036>2036</option>  
 <option value=2037>2037</option>  
 <option value=2038>2038</option>  
 <option value=2039>2039</option>  
 <option value=2040>2040</option>  
 <option value=2041>2041</option>  
 <option value=2042>2042</option>  
 <option value=2043>2043</option>  
 <option value=2044>2044</option>  
 <option value=2045>2045</option>  
 <option value=2046>2046</option>  
 <option value=2047>2047</option>  
 <option value=2048>2048</option>  
 <option value=2049>2049</option>  
 <option value=2050>2050</option>  
 <option value=2051>2051</option>  
 </select>  
 and:<select name="creationdatemonthend">  
 <option value="12"> </option>  
 <option value="01">January</option>  
 <option value="02">February</option>  
 <option value="03">March</option>  
 <option value="04">April</option>  
 <option value="05">May</option>  
 <option value="06">June</option>  
 <option value="07">July</option>  
 <option value="08">August</option>  
 <option value="09">September</option>  
 <option value="10">October</option>  
 <option value="11">November</option>  
 <option value="12">December</option>  
 </select>  
 <select name="creationdatedayend">  
 <option value=28> </option>  
 <option value=1>1</option>  
 <option value=2>2</option>  
 <option value=3>3</option>  
 <option value=4>4</option>  
 <option value=5>5</option>  
 <option value=6>6</option>  
 <option value=7>7</option>  
 <option value=8>8</option>  
 <option value=9>9</option>  
 <option value=10>10</option>  
 <option value=11>11</option>  
 <option value=12>12</option>  
 <option value=13>13</option>  
 <option value=14>14</option>  
 <option value=15>15</option>  
 <option value=16>16</option>  
 <option value=17>17</option>  
 <option value=18>18</option>  
 <option value=19>19</option>  
 <option value=20>20</option>  
 <option value=21>21</option>  
 <option value=22>22</option>  
 <option value=23>23</option>  
 <option value=24>24</option>  
 <option value=25>25</option>  
 <option value=26>26</option>  
 <option value=27>27</option>  
 <option value=28>28</option>  
 <option value=29>29</option>  
 <option value=30>30</option>  
 <option value=31>31</option>  
 </select>  
 <select name="creationdateyearend">  
 <option value=2051> </option>  
 <option value=1976>1976</option>  
 <option value=1977>1977</option>  
 <option value=1978>1978</option>  
 <option value=1979>1979</option>  
 <option value=1980>1980</option>  
 <option value=1981>1981</option>  
 <option value=1982>1982</option>  
 <option value=1983>1983</option>  
 <option value=1984>1984</option>  
 <option value=1985>1985</option>  
 <option value=1986>1986</option>  
 <option value=1987>1987</option>  
 <option value=1988>1988</option>  
 <option value=1989>1989</option>  
 <option value=1990>1990</option>  
 <option value=1991>1991</option>  
 <option value=1992>1992</option>  
 <option value=1993>1993</option>  
 <option value=1994>1994</option>  
 <option value=1995>1995</option>  
 <option value=1996>1996</option>  
 <option value=1997>1997</option>  
 <option value=1998>1998</option>  
 <option value=1999>1999</option>  
 <option value=2000>2000</option>  
 <option value=2001>2001</option>  
 <option value=2002>2002</option>  
 <option value=2003>2003</option>  
 <option value=2004>2004</option>  
 <option value=2005>2005</option>  
 <option value=2006>2006</option>  
 <option value=2007>2007</option>  
 <option value=2008>2008</option>  
 <option value=2009>2009</option>  
 <option value=2010>2010</option>  
 <option value=2011>2011</option>  
 <option value=2012>2012</option>  
 <option value=2013>2013</option>  
 <option value=2014>2014</option>  
 <option value=2015>2015</option>  
 <option value=2016>2016</option>  
 <option value=2017>2017</option>  
 <option value=2018>2018</option>  
 <option value=2019>2019</option>  
 <option value=2020>2020</option>  
 <option value=2021>2021</option>  
 <option value=2022>2022</option>  
 <option value=2023>2023</option>  
 <option value=2024>2024</option>  
 <option value=2025>2025</option>  
 <option value=2026>2026</option>  
 <option value=2027>2027</option>  
 <option value=2028>2028</option>  
 <option value=2029>2029</option>  
 <option value=2030>2030</option>  
 <option value=2031>2031</option>  
 <option value=2032>2032</option>  
 <option value=2033>2033</option>  
 <option value=2034>2034</option>  
 <option value=2035>2035</option>  
 <option value=2036>2036</option>  
 <option value=2037>2037</option>  
 <option value=2038>2038</option>  
 <option value=2039>2039</option>  
 <option value=2040>2040</option>  
 <option value=2041>2041</option>  
 <option value=2042>2042</option>  
 <option value=2043>2043</option>  
 <option value=2044>2044</option>  
 <option value=2045>2045</option>  
 <option value=2046>2046</option>  
 <option value=2047>2047</option>  
 <option value=2048>2048</option>  
 <option value=2049>2049</option>  
 <option value=2050>2050</option>  
 <option value=2051>2051</option>  
 </select>  
 </p>  
 CREATIONDATEEND  CREATIONDATEEND
       $scrout.=&dateboxes('creationdateend',12,31,2051,
    $ENV{'form.creationdateend_month'},
    $ENV{'form.creationdateend_day'},
    $ENV{'form.creationdateend_year'},
    );
       $scrout.="</p>";
   
     $scrout.=<<LASTREVISIONDATEEND;      $scrout.=<<LASTREVISIONDATESTART;
 <p>  <p>
 <font color="#800000" face="helvetica"><b>LIMIT BY LAST REVISION DATE RANGE:  <font color="#800000" face="helvetica"><b>LIMIT BY LAST REVISION DATE RANGE:
 </b></font>  </b></font>
 <br>between:<select name="lastrevisiondatemonthstart">  <br />between:
 <option value="00"> </option>  LASTREVISIONDATESTART
 <option value="01">January</option>      $scrout.=&dateboxes('lastrevisiondatestart',1,1,1976,
 <option value="02">February</option>   $ENV{'form.lastrevisiondatestart_month'},
 <option value="03">March</option>   $ENV{'form.lastrevisiondatestart_day'},
 <option value="04">April</option>   $ENV{'form.lastrevisiondatestart_year'},
 <option value="05">May</option>   );
 <option value="06">June</option>      $scrout.=<<LASTREVISIONDATEEND;
 <option value="07">July</option>  and:
 <option value="08">August</option>  
 <option value="09">September</option>  
 <option value="10">October</option>  
 <option value="11">November</option>  
 <option value="12">December</option>  
 </select>  
 <select name="lastrevisiondatedaystart">  
 <option value=1> </option>  
 <option value=1>1</option>  
 <option value=2>2</option>  
 <option value=3>3</option>  
 <option value=4>4</option>  
 <option value=5>5</option>  
 <option value=6>6</option>  
 <option value=7>7</option>  
 <option value=8>8</option>  
 <option value=9>9</option>  
 <option value=10>10</option>  
 <option value=11>11</option>  
 <option value=12>12</option>  
 <option value=13>13</option>  
 <option value=14>14</option>  
 <option value=15>15</option>  
 <option value=16>16</option>  
 <option value=17>17</option>  
 <option value=18>18</option>  
 <option value=19>19</option>  
 <option value=20>20</option>  
 <option value=21>21</option>  
 <option value=22>22</option>  
 <option value=23>23</option>  
 <option value=24>24</option>  
 <option value=25>25</option>  
 <option value=26>26</option>  
 <option value=27>27</option>  
 <option value=28>28</option>  
 <option value=29>29</option>  
 <option value=30>30</option>  
 <option value=31>31</option>  
 </select>  
 <select name="lastrevisiondateyearstart">  
 <option value=1976> </option>  
 <option value=1976>1976</option>  
 <option value=1977>1977</option>  
 <option value=1978>1978</option>  
 <option value=1979>1979</option>  
 <option value=1980>1980</option>  
 <option value=1981>1981</option>  
 <option value=1982>1982</option>  
 <option value=1983>1983</option>  
 <option value=1984>1984</option>  
 <option value=1985>1985</option>  
 <option value=1986>1986</option>  
 <option value=1987>1987</option>  
 <option value=1988>1988</option>  
 <option value=1989>1989</option>  
 <option value=1990>1990</option>  
 <option value=1991>1991</option>  
 <option value=1992>1992</option>  
 <option value=1993>1993</option>  
 <option value=1994>1994</option>  
 <option value=1995>1995</option>  
 <option value=1996>1996</option>  
 <option value=1997>1997</option>  
 <option value=1998>1998</option>  
 <option value=1999>1999</option>  
 <option value=2000>2000</option>  
 <option value=2001>2001</option>  
 <option value=2002>2002</option>  
 <option value=2003>2003</option>  
 <option value=2004>2004</option>  
 <option value=2005>2005</option>  
 <option value=2006>2006</option>  
 <option value=2007>2007</option>  
 <option value=2008>2008</option>  
 <option value=2009>2009</option>  
 <option value=2010>2010</option>  
 <option value=2011>2011</option>  
 <option value=2012>2012</option>  
 <option value=2013>2013</option>  
 <option value=2014>2014</option>  
 <option value=2015>2015</option>  
 <option value=2016>2016</option>  
 <option value=2017>2017</option>  
 <option value=2018>2018</option>  
 <option value=2019>2019</option>  
 <option value=2020>2020</option>  
 <option value=2021>2021</option>  
 <option value=2022>2022</option>  
 <option value=2023>2023</option>  
 <option value=2024>2024</option>  
 <option value=2025>2025</option>  
 <option value=2026>2026</option>  
 <option value=2027>2027</option>  
 <option value=2028>2028</option>  
 <option value=2029>2029</option>  
 <option value=2030>2030</option>  
 <option value=2031>2031</option>  
 <option value=2032>2032</option>  
 <option value=2033>2033</option>  
 <option value=2034>2034</option>  
 <option value=2035>2035</option>  
 <option value=2036>2036</option>  
 <option value=2037>2037</option>  
 <option value=2038>2038</option>  
 <option value=2039>2039</option>  
 <option value=2040>2040</option>  
 <option value=2041>2041</option>  
 <option value=2042>2042</option>  
 <option value=2043>2043</option>  
 <option value=2044>2044</option>  
 <option value=2045>2045</option>  
 <option value=2046>2046</option>  
 <option value=2047>2047</option>  
 <option value=2048>2048</option>  
 <option value=2049>2049</option>  
 <option value=2050>2050</option>  
 <option value=2051>2051</option>  
 </select>  
 and:<select name="lastrevisiondatemonthend">  
 <option value="12"> </option>  
 <option value="01">January</option>  
 <option value="02">February</option>  
 <option value="03">March</option>  
 <option value="04">April</option>  
 <option value="05">May</option>  
 <option value="06">June</option>  
 <option value="07">July</option>  
 <option value="08">August</option>  
 <option value="09">September</option>  
 <option value="10">October</option>  
 <option value="11">November</option>  
 <option value="12">December</option>  
 </select>  
 <select name="lastrevisiondatedayend">  
 <option value=28> </option>  
 <option value=1>1</option>  
 <option value=2>2</option>  
 <option value=3>3</option>  
 <option value=4>4</option>  
 <option value=5>5</option>  
 <option value=6>6</option>  
 <option value=7>7</option>  
 <option value=8>8</option>  
 <option value=9>9</option>  
 <option value=10>10</option>  
 <option value=11>11</option>  
 <option value=12>12</option>  
 <option value=13>13</option>  
 <option value=14>14</option>  
 <option value=15>15</option>  
 <option value=16>16</option>  
 <option value=17>17</option>  
 <option value=18>18</option>  
 <option value=19>19</option>  
 <option value=20>20</option>  
 <option value=21>21</option>  
 <option value=22>22</option>  
 <option value=23>23</option>  
 <option value=24>24</option>  
 <option value=25>25</option>  
 <option value=26>26</option>  
 <option value=27>27</option>  
 <option value=28>28</option>  
 <option value=29>29</option>  
 <option value=30>30</option>  
 <option value=31>31</option>  
 </select>  
 <select name="lastrevisiondateyearend">  
 <option value=2051> </option>  
 <option value=1976>1976</option>  
 <option value=1977>1977</option>  
 <option value=1978>1978</option>  
 <option value=1979>1979</option>  
 <option value=1980>1980</option>  
 <option value=1981>1981</option>  
 <option value=1982>1982</option>  
 <option value=1983>1983</option>  
 <option value=1984>1984</option>  
 <option value=1985>1985</option>  
 <option value=1986>1986</option>  
 <option value=1987>1987</option>  
 <option value=1988>1988</option>  
 <option value=1989>1989</option>  
 <option value=1990>1990</option>  
 <option value=1991>1991</option>  
 <option value=1992>1992</option>  
 <option value=1993>1993</option>  
 <option value=1994>1994</option>  
 <option value=1995>1995</option>  
 <option value=1996>1996</option>  
 <option value=1997>1997</option>  
 <option value=1998>1998</option>  
 <option value=1999>1999</option>  
 <option value=2000>2000</option>  
 <option value=2001>2001</option>  
 <option value=2002>2002</option>  
 <option value=2003>2003</option>  
 <option value=2004>2004</option>  
 <option value=2005>2005</option>  
 <option value=2006>2006</option>  
 <option value=2007>2007</option>  
 <option value=2008>2008</option>  
 <option value=2009>2009</option>  
 <option value=2010>2010</option>  
 <option value=2011>2011</option>  
 <option value=2012>2012</option>  
 <option value=2013>2013</option>  
 <option value=2014>2014</option>  
 <option value=2015>2015</option>  
 <option value=2016>2016</option>  
 <option value=2017>2017</option>  
 <option value=2018>2018</option>  
 <option value=2019>2019</option>  
 <option value=2020>2020</option>  
 <option value=2021>2021</option>  
 <option value=2022>2022</option>  
 <option value=2023>2023</option>  
 <option value=2024>2024</option>  
 <option value=2025>2025</option>  
 <option value=2026>2026</option>  
 <option value=2027>2027</option>  
 <option value=2028>2028</option>  
 <option value=2029>2029</option>  
 <option value=2030>2030</option>  
 <option value=2031>2031</option>  
 <option value=2032>2032</option>  
 <option value=2033>2033</option>  
 <option value=2034>2034</option>  
 <option value=2035>2035</option>  
 <option value=2036>2036</option>  
 <option value=2037>2037</option>  
 <option value=2038>2038</option>  
 <option value=2039>2039</option>  
 <option value=2040>2040</option>  
 <option value=2041>2041</option>  
 <option value=2042>2042</option>  
 <option value=2043>2043</option>  
 <option value=2044>2044</option>  
 <option value=2045>2045</option>  
 <option value=2046>2046</option>  
 <option value=2047>2047</option>  
 <option value=2048>2048</option>  
 <option value=2049>2049</option>  
 <option value=2050>2050</option>  
 <option value=2051>2051</option>  
 </select>  
 </p>  
 LASTREVISIONDATEEND  LASTREVISIONDATEEND
       $scrout.=&dateboxes('lastrevisiondateend',12,31,2051,
    $ENV{'form.lastrevisiondateend_month'},
    $ENV{'form.lastrevisiondateend_day'},
    $ENV{'form.lastrevisiondateend_year'},
    );
       $scrout.='</p>';
   
     $scrout.=&searchphrasefield('Limit by publisher/owner','owner',      $scrout.=&searchphrasefield('Limit by publisher/owner','owner',
  $metadatafields{'owner'});   $ENV{'form.owner'});
   
       $ENV{'form.copyright'}='any' unless length($ENV{'form.copyright'});
     $scrout.=&selectbox('Limit by copyright/distribution','copyright',      $scrout.=&selectbox('Limit by copyright/distribution','copyright',
  'any',%cprtag);   $ENV{'form.copyright'},%cprtag);
   
   # ------------------------------------------- Compute customized metadata field
       $scrout.=<<CUSTOMMETADATA;
   <p>
   <font color="#800000" face="helvetica"><b>LIMIT BY SPECIAL METADATA FIELDS:</b>
   </font>
   For resource-specific metadata, enter in an expression in the form of 
   <i>key</i>=<i>value</i> separated by operators such as AND or OR.<br />
   <b>Example:</b> grandmother=75 OR grandfather=85
   <br />
   CUSTOMMETADATA
   $scrout.=&simpletextfield('custommetadata',$ENV{'form.custommetadata'});
   $scrout.=' <i>initial users of this system do not need to worry about this option</i>';
   
       $scrout.=<<CUSTOMSHOW;
   <p>
   <font color="#800000" face="helvetica"><b>SHOW SPECIAL METADATA FIELDS:</b>
   </font>
   Enter in a space-separated list of special metadata fields to show
   in a fielded listing for each record result.
   <br />
   CUSTOMSHOW
   $scrout.=&simpletextfield('customshow',$ENV{'form.customshow'});
   $scrout.=' <i>initial users of this system do not need to worry about this option</i>';
   
 # ---------------------------------------------------------------- Print screen  # ---------------------------------------------------------------- Print screen
     $r->print(<<ENDDOCUMENT);      $r->print(<<ENDDOCUMENT);
Line 618  LASTREVISIONDATEEND Line 360  LASTREVISIONDATEEND
 <title>The LearningOnline Network with CAPA</title>  <title>The LearningOnline Network with CAPA</title>
 </head>  </head>
 <body bgcolor="#FFFFFF">  <body bgcolor="#FFFFFF">
   <img align='right' src='/adm/lonIcons/lonlogos.gif' />
 <h1>Search Catalog</h1>  <h1>Search Catalog</h1>
 <form method="post" action="/adm/searchcat">  <form method="post" action="/adm/searchcat">
 <hr>  $hidden
   <hr />
 <h3>Basic Search</h3>  <h3>Basic Search</h3>
 <p>  <p>
 Enter terms or phrases separated by search operators  Enter terms or phrases separated by search operators
 such as AND or OR then press SEARCH below.  Terms should be specific  such as AND or OR then press SEARCH below.  Terms should be specific
 to the title, author, subject, notes, or abstract information associated  to the title, author, subject, notes, or abstract information associated
 with a resource.  with a resource.
 <br>  <br />
 <input type="text" name="basicexp">  ENDDOCUMENT
 <input type="checkbox" name="titleonly">      $r->print(&simpletextfield('basicexp',$ENV{'form.basicexp'}));
 <font color="#800000">Title only</font>      $r->print(' ');
 <br>      $r->print(&simplecheckbox('titleonly',$ENV{'form.titleonly'}));
 <input type="submit" name="basicsubmit" value="SEARCH">      $r->print('<font color="#800000">Title only</font> ');
   #    $r->print(&simplecheckbox('allversions',$ENV{'form.allversions'}));
   # <font color="#800000">Search historic archives</font>
       $r->print(<<ENDDOCUMENT);
   <br />
   <input type="submit" name="basicsubmit" value='SEARCH' />
   <input type="reset" name="reset" value='RESET' />
   $closebutton
   $basicviewselect
 </p>  </p>
 <hr>  <hr />
 <h3>Advanced Search</h3>  <h3>Advanced Search</h3>
 $scrout  $scrout
 <p>  <p>
 <input type="submit" name="advancedsubmit" value="SEARCH">  <input type="submit" name="advancedsubmit" value='SEARCH' />
   <input type="reset" name="reset" value='RESET' />
   $closebutton
   $advancedviewselect
 </p>  </p>
 </form>  </form>
 </body>  </body>
Line 647  ENDDOCUMENT Line 402  ENDDOCUMENT
     return OK;      return OK;
 }   } 
   
   # ----------- grab unprocessed CGI variables that may have been appended to URL
   sub get_unprocessed_cgi {
       map {
          my ($name, $value) = split(/=/,$_);
          $value =~ tr/+/ /;
          $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
          if ($name eq 'catalogmode') {
      $ENV{'form.'.$name}=$value;
          }
       } (split(/&/,$ENV{'QUERY_STRING'}));
   }
   
   # ------------------------------------------------------------- make persistent
   sub make_persistent {
       my $persistent='';
       
       map {
    if (/^form\./ && !/submit/) {
       my $name=$_;
       my $key=$name;
       $ENV{$key}=~s/\'//g; # do not mess with html field syntax
       $name=~s/^form\.//;
       $persistent.=<<END;
   <input type='hidden' name='$name' value='$ENV{$key}' />
   END
           }
       } (keys %ENV);
       return $persistent;
   }
   
 # --------------------------------------------------------- Various form fields  # --------------------------------------------------------- Various form fields
   
 sub textfield {  sub simpletextfield {
     my ($title,$name,$value)=@_;      my ($name,$value)=@_;
     return "\n<p><b>$title:</b><br>".      return '<input type=text name=\''.$name.
            '<input type=text name="'.$name.'" size=80 value="'.$value.'">';     '\' size=20 value=\''.$value.'\' />';
   }
   
   sub simplecheckbox {
       my ($name,$value)=@_;
       my $checked='';
       $checked="CHECKED" if $value eq 'on';
       return '<input type=checkbox name=\''.$name.'\' '. $checked . '>';
 }  }
   
 sub searchphrasefield {  sub searchphrasefield {
Line 663  as AND or OR. Line 455  as AND or OR.
 END  END
     my $uctitle=uc($title);      my $uctitle=uc($title);
     return "\n<p><font color=\"#800000\" face=\"helvetica\"><b>$uctitle:</b>".      return "\n<p><font color=\"#800000\" face=\"helvetica\"><b>$uctitle:</b>".
    ":</FONT> $instruction<br>".     "</FONT> $instruction<br />".
            '<input type=text name="'.$name.'" size=80 value="'.$value.'">';             '<input type=text name="'.$name.'" size=80 value=\''.$value.'\'>';
   }
   
   sub dateboxes {
       my ($name,$defaultmonth,$defaultday,$defaultyear,
    $currentmonth,$currentday,$currentyear)=@_;
       ($defaultmonth,$defaultday,$defaultyear)=('','','');
       my $month=<<END;
   <select name="${name}_month">
   <option value='$defaultmonth'> </option>
   <option value="1">January</option>
   <option value="2">February</option>
   <option value="3">March</option>
   <option value="4">April</option>
   <option value="5">May</option>
   <option value="6">June</option>
   <option value="7">July</option>
   <option value="8">August</option>
   <option value="9">September</option>
   <option value="10">October</option>
   <option value="11">November</option>
   <option value="12">December</option>
   </select>
   END
       $month=~s/(\"$currentmonth\")/$1 SELECTED/ if length($currentmonth);
       my $day=<<END;
   <select name="${name}_day">
   <option value='$defaultday'> </option>
   <option value="1">1</option>
   <option value="2">2</option>
   <option value="3">3</option>
   <option value="4">4</option>
   <option value="5">5</option>
   <option value="6">6</option>
   <option value="7">7</option>
   <option value="8">8</option>
   <option value="9">9</option>
   <option value="10">10</option>
   <option value="11">11</option>
   <option value="12">12</option>
   <option value="13">13</option>
   <option value="14">14</option>
   <option value="15">15</option>
   <option value="16">16</option>
   <option value="17">17</option>
   <option value="18">18</option>
   <option value="19">19</option>
   <option value="20">20</option>
   <option value="21">21</option>
   <option value="22">22</option>
   <option value="23">23</option>
   <option value="24">24</option>
   <option value="25">25</option>
   <option value="26">26</option>
   <option value="27">27</option>
   <option value="28">28</option>
   <option value="29">29</option>
   <option value="30">30</option>
   <option value="31">31</option>
   </select>
   END
       $day=~s/(\"$currentday\")/$1 SELECTED/ if length($currentday);
       my $year=<<END;
   <select name="${name}_year">
   <option value='$defaultyear'> </option>
   <option value="1976">1976</option>
   <option value="1977">1977</option>
   <option value="1978">1978</option>
   <option value="1979">1979</option>
   <option value="1980">1980</option>
   <option value="1981">1981</option>
   <option value="1982">1982</option>
   <option value="1983">1983</option>
   <option value="1984">1984</option>
   <option value="1985">1985</option>
   <option value="1986">1986</option>
   <option value="1987">1987</option>
   <option value="1988">1988</option>
   <option value="1989">1989</option>
   <option value="1990">1990</option>
   <option value="1991">1991</option>
   <option value="1992">1992</option>
   <option value="1993">1993</option>
   <option value="1994">1994</option>
   <option value="1995">1995</option>
   <option value="1996">1996</option>
   <option value="1997">1997</option>
   <option value="1998">1998</option>
   <option value="1999">1999</option>
   <option value="2000">2000</option>
   <option value="2001">2001</option>
   <option value="2002">2002</option>
   <option value="2003">2003</option>
   <option value="2004">2004</option>
   <option value="2005">2005</option>
   <option value="2006">2006</option>
   <option value="2007">2007</option>
   <option value="2008">2008</option>
   <option value="2009">2009</option>
   <option value="2010">2010</option>
   <option value="2011">2011</option>
   <option value="2012">2012</option>
   <option value="2013">2013</option>
   <option value="2014">2014</option>
   <option value="2015">2015</option>
   <option value="2016">2016</option>
   <option value="2017">2017</option>
   <option value="2018">2018</option>
   <option value="2019">2019</option>
   <option value="2020">2020</option>
   <option value="2021">2021</option>
   <option value="2022">2022</option>
   <option value="2023">2023</option>
   <option value="2024">2024</option>
   <option value="2025">2025</option>
   <option value="2026">2026</option>
   <option value="2027">2027</option>
   <option value="2028">2028</option>
   <option value="2029">2029</option>
   <option value="2030">2030</option>
   <option value="2031">2031</option>
   <option value="2032">2032</option>
   <option value="2033">2033</option>
   <option value="2034">2034</option>
   <option value="2035">2035</option>
   <option value="2036">2036</option>
   <option value="2037">2037</option>
   <option value="2038">2038</option>
   <option value="2039">2039</option>
   <option value="2040">2040</option>
   <option value="2041">2041</option>
   <option value="2042">2042</option>
   <option value="2043">2043</option>
   <option value="2044">2044</option>
   <option value="2045">2045</option>
   <option value="2046">2046</option>
   <option value="2047">2047</option>
   <option value="2048">2048</option>
   <option value="2049">2049</option>
   <option value="2050">2050</option>
   <option value="2051">2051</option>
   </select>
   END
       $year=~s/(\"$currentyear\")/$1 SELECTED/ if length($currentyear);
       return "$month$day$year";
 }  }
   
 sub selectbox {  sub selectbox {
     my ($title,$name,$value,%options)=@_;      my ($title,$name,$value,%options)=@_;
     my $uctitle=uc($title);      my $uctitle=uc($title);
     my $selout="\n<p><font color=\"#800000\" face=\"helvetica\"><b>$uctitle:".      my $selout="\n<p><font color=\"#800000\" face=\"helvetica\"><b>$uctitle:".
  "</b></font><br>".'<select name="'.$name.'">';   "</b></font><br />".'<select name="'.$name.'">';
     map {      map {
         $selout.='<option value="'.$_.'"';          $selout.='<option value=\''.$_.'\'';
         if ($_ eq $value) { $selout.=' selected'; }          if ($_ eq $value) { $selout.=' selected'; }
         $selout.='>'.$options{$_}.'</option>';          $selout.='>'.$options{$_}.'</option>';
     } sort keys %options;      } sort keys %options;
     return $selout.'</select>';      return $selout.'</select>';
 }  }
   
   # ----------------------------------------------- Performing an advanced search
   sub advancedsearch {
       my ($r,$envhash)=@_;
       my %ENV=%{$envhash};
   
       my $fillflag=0;
       # Clean up fields for safety
       for my $field ('title','author','subject','keywords','url','version',
      'creationdatestart_month','creationdatestart_day',
      'creationdatestart_year','creationdateend_month',
      'creationdateend_day','creationdateend_year',
      'lastrevisiondatestart_month','lastrevisiondatestart_day',
      'lastrevisiondatestart_year','lastrevisiondateend_month',
      'lastrevisiondateend_day','lastrevisiondateend_year',
      'notes','abstract','mime','language','owner',
      'custommetadata','customshow') {
    $ENV{"form.$field"}=~s/[^\w\s\(\)\=\-\"\']//g;
       }
   
       # Check to see if enough information was filled in
       for my $field ('title','author','subject','keywords','url','version',
      'notes','abstract','mime','language','owner',
      'custommetadata') {
    if (&filled($ENV{"form.$field"})) {
       $fillflag++;
    }
       }
       unless ($fillflag) {
    &output_blank_field_error($r);
    return OK;
       }
   
   
       # Turn the form input into a SQL-based query
       my $query='';
   
       my @queries;
       # Evaluate logical expression AND/OR/NOT phrase fields.
       foreach my $field ('title','author','subject','notes','abstract','url',
          'keywords','version','owner') {
    if ($ENV{'form.'.$field}) {
       push @queries,&build_SQL_query($field,$ENV{'form.'.$field});
    }
       }
       # Evaluate option lists
       if ($ENV{'form.language'} and $ENV{'form.language'} ne 'any') {
    push @queries,"(language like \"$ENV{'form.language'}\")";
       }
       if ($ENV{'form.mime'} and $ENV{'form.mime'} ne 'any') {
    push @queries,"(mime like \"$ENV{'form.mime'}\")";
       }
       if ($ENV{'form.copyright'} and $ENV{'form.copyright'} ne 'any') {
    push @queries,"(copyright like \"$ENV{'form.copyright'}\")";
       }
       # Evaluate date windows
       my $datequery=&build_date_queries(
    $ENV{'form.creationdatestart_month'},
    $ENV{'form.creationdatestart_day'},
    $ENV{'form.creationdatestart_year'},
    $ENV{'form.creationdateend_month'},
    $ENV{'form.creationdateend_day'},
    $ENV{'form.creationdateend_year'},
    $ENV{'form.lastrevisiondatestart_month'},
    $ENV{'form.lastrevisiondatestart_day'},
    $ENV{'form.lastrevisiondatestart_year'},
    $ENV{'form.lastrevisiondateend_month'},
    $ENV{'form.lastrevisiondateend_day'},
    $ENV{'form.lastrevisiondateend_year'},
    );
       # Test to see if date windows are legitimate
       if ($datequery=~/^Incorrect/) {
    &output_date_error($r,$datequery);
    return OK;
       }
       elsif ($datequery) {
    push @queries,$datequery;
       }
   
       # Process form information for custom metadata querying
       my $customquery='';
       if ($ENV{'form.custommetadata'}) {
    $customquery=&build_custommetadata_query('custommetadata',
         $ENV{'form.custommetadata'});
       }
       my $customshow='';
       if ($ENV{'form.customshow'}) {
    $customshow=$ENV{'form.customshow'};
    $customshow=~s/[^\w\s]//g;
    my @fields=split(/\s+/,$customshow);
    $customshow=join(" ",@fields);
       }
       # Send query statements over the network to be processed by either the SQL
       # database or a recursive scheme of 'grep'-like actions (for custom
       # metadata).
       if (@queries) {
    $query=join(" AND ",@queries);
    $query="select * from metadata where $query";
    my $reply; # reply hash reference
    unless ($customquery or $customshow) {
       $reply=&Apache::lonnet::metadata_query($query);
    }
    else {
       $reply=&Apache::lonnet::metadata_query($query,
      $customquery,$customshow);
    }
    &output_results('Advanced',$r,$envhash,$customquery,$reply);
       }
       elsif ($customquery) {
    my $reply; # reply hash reference
    $reply=&Apache::lonnet::metadata_query('',
          $customquery,$customshow);
    &output_results('Advanced',$r,$envhash,$customquery,$reply);
       }
       # should not get to this point
       return 'Error.  Should not have gone to this point.';
   }
   
   # --------------------------------------------------- Performing a basic search
   sub basicsearch {
       my ($r,$envhash)=@_;
       my %ENV=%{$envhash};
       # Clean up fields for safety
       for my $field ('basicexp') {
    $ENV{"form.$field"}=~s/[^\w\s\(\)\-]//g;
       }
   
       # Check to see if enough is filled in
       unless (&filled($ENV{'form.basicexp'})) {
    &output_blank_field_error($r);
    return OK;
       }
   
       # Build SQL query string based on form page
       my $query='';
       my $concatarg=join(',"    ",',
          ('title', 'author', 'subject', 'notes', 'abstract'));
       $concatarg='title' if $ENV{'form.titleonly'};
   
       $query=&build_SQL_query('concat('.$concatarg.')',$ENV{'form.'.'basicexp'});
   
       # Get reply (either a hash reference to filehandles or bad connection)
       my $reply=&Apache::lonnet::metadata_query('select * from metadata where '.$query);
   
       # Output search results
   
       &output_results('Basic',$r,$envhash,$query,$reply);
   
       return OK;
   }
   
   # ------------------------------------------------------------- build_SQL_query
   sub build_SQL_query {
       my ($field_name,$logic_statement)=@_;
       my $q=new Text::Query('abc',
     -parse => 'Text::Query::ParseAdvanced',
     -build => 'Text::Query::Build');
       $q->prepare($logic_statement);
       my $matchexp=${$q}{'matchexp'}; chomp $matchexp;
       my $sql_query=&recursive_SQL_query_build($field_name,$matchexp);
       return $sql_query;
   }
   
   # ------------------------------------------------- build custom metadata query
   sub build_custommetadata_query {
       my ($field_name,$logic_statement)=@_;
       my $q=new Text::Query('abc',
     -parse => 'Text::Query::ParseAdvanced',
     -build => 'Text::Query::BuildAdvancedString');
       $q->prepare($logic_statement);
       my $matchexp=${$q}{'-parse'}{'-build'}{'matchstring'};
       # quick fix to change literal into xml tag-matching
       # will eventually have to write a separate builder module
       my $oldmatchexp=$matchexp;
       $matchexp=~s/(\w+)\\\=([\w\\\+]+)/\\\<$1\\\>\[\^\\\<\]\*$2\[\^\\\<\]\*\\\<\\\/$1\\\>/g;
       return $matchexp;
   }
   
   # - Recursively parse a reverse notation expression into a SQL query expression
   sub recursive_SQL_query_build {
       my ($dkey,$pattern)=@_;
       my @matches=($pattern=~/(\[[^\]|\[]*\])/g);
       return $pattern unless @matches;
       foreach my $match (@matches) {
    $match=~/\[ (\w+)\s(.*) \]/;
    my ($key,$value)=($1,$2);
    my $replacement='';
    if ($key eq 'literal') {
       $replacement="($dkey like \"\%$value\%\")";
    }
    elsif ($key eq 'not') {
       $value=~s/like/not like/;
   #    $replacement="($dkey not like $value)";
       $replacement="$value";
    }
    elsif ($key eq 'and') {
       $value=~/(.*[\"|\)]) ([|\(|\^].*)/;
       $replacement="($1 AND $2)";
    }
    elsif ($key eq 'or') {
       $value=~/(.*[\"|\)]) ([|\(|\^].*)/;
       $replacement="($1 OR $2)";
    }
    substr($pattern,
          index($pattern,$match),
          length($match),
          $replacement
          );
       }
       &recursive_SQL_query_build($dkey,$pattern);
   }
   
   # ------------------------------------------------------------ Build date query
   sub build_date_queries {
       my ($cmonth1,$cday1,$cyear1,$cmonth2,$cday2,$cyear2,
    $lmonth1,$lday1,$lyear1,$lmonth2,$lday2,$lyear2)=@_;
       my @queries;
       if ($cmonth1 or $cday1 or $cyear1 or $cmonth2 or $cday2 or $cyear2) {
    unless ($cmonth1 and $cday1 and $cyear1 and
    $cmonth2 and $cday2 and $cyear2) {
       return "Incorrect entry for the creation date.  You must specify ".
      "a starting month, day, and year and an ending month, ".
      "day, and year.";
    }
    my $cnumeric1=sprintf("%d%2d%2d",$cyear1,$cmonth1,$cday1);
    $cnumeric1+=0;
    my $cnumeric2=sprintf("%d%2d%2d",$cyear2,$cmonth2,$cday2);
    $cnumeric2+=0;
    if ($cnumeric1>$cnumeric2) {
       return "Incorrect entry for the creation date.  The starting ".
      "date must occur before the ending date.";
    }
    my $cquery="(creationdate BETWEEN '$cyear1-$cmonth1-$cday1' AND '".
              "$cyear2-$cmonth2-$cday2 23:59:59')";
    push @queries,$cquery;
       }
       if ($lmonth1 or $lday1 or $lyear1 or $lmonth2 or $lday2 or $lyear2) {
    unless ($lmonth1 and $lday1 and $lyear1 and
    $lmonth2 and $lday2 and $lyear2) {
       return "Incorrect entry for the last revision date.  You must ".
      "specify a starting month, day, and year and an ending ".
      "month, day, and year.";
    }
    my $lnumeric1=sprintf("%d%2d%2d",$lyear1,$lmonth1,$lday1);
    $lnumeric1+=0;
    my $lnumeric2=sprintf("%d%2d%2d",$lyear2,$lmonth2,$lday2);
    $lnumeric2+=0;
    if ($lnumeric1>$lnumeric2) {
       return "Incorrect entry for the last revision date.  The ".
      "starting date must occur before the ending date.";
    }
    my $lquery="(lastrevisiondate BETWEEN '$lyear1-$lmonth1-$lday1' AND '".
              "$lyear2-$lmonth2-$lday2 23:59:59')";
    push @queries,$lquery;
       }
       if (@queries) {
    return join(" AND ",@queries);
       }
       return '';
   }
   
   # ----------------------------- format and output results based on a reply list
   # There are two windows that this function writes to.  The main search
   # window ("srch") has a listing of the results.  A secondary window ("popwin")
   # gives the status of the network search (time elapsed, number of machines
   # contacted, etc.)
   sub output_results {
       my ($mode,$r,$envhash,$query,$replyref)=@_;
       my %ENV=%{$envhash};
       my %rhash=%{$replyref};
       my $compiledresult='';
       my $timeremain=30;
       my $elapsetime=0;
       my $resultflag=0;
       my $tflag=1;
   
       # make query information persistent to allow for subsequent revision
       my $persistent=&make_persistent();
   
       # output beginning of search page
    $r->print(<<BEGINNING);
   <html>
   <head>
   <title>The LearningOnline Network with CAPA</title>
   BEGINNING
   
       # conditional output of script functions dependent on the mode in
       # which the search was invoked
           $r->print(<<SCRIPT) if $ENV{'form.catalogmode'} eq 'interactive';
   <script>
       function select_data(title,url) {
    changeTitle(title);
    changeURL(url);
    self.close();
       }
       function changeTitle(val) {
    if (opener.inf.document.forms.resinfo.elements.t) {
       opener.inf.document.forms.resinfo.elements.t.value=val;
    }
       }
       function changeURL(val) {
    if (opener.inf.document.forms.resinfo.elements.u) {
       opener.inf.document.forms.resinfo.elements.u.value=val;
    }
       }
   </script>
   SCRIPT
           $r->print(<<SCRIPT) if $ENV{'form.catalogmode'} eq 'groupsearch';
   <script>
       function select_data(title,url) {
    alert('DEBUG: Should be storing '+title+' and '+url);
       }
       function queue(val) {
    if (eval("document.forms."+val+".filelink.checked")) {
       document.forms.results.acts.value+='1a'+val+'b';
    }
    else {
       document.forms.results.acts.value+='0a'+val+'b';
    }
       }
       function select_group() {
    alert('DEBUG: Should be moving on to group sorting stage'+' acts');
       }
   </script>
   SCRIPT
           $r->print(<<SCRIPT);                                            ;
   <script>
       function displayinfo(val) {
    popwin.document.forms.popremain.sdetails.value=val;
       }
   </script>
   SCRIPT
       $r->rflush();
   
       # begin showing the cataloged results
       $r->print(<<CATALOGBEGIN);
   </head>
   <body bgcolor="#ffffff">
   <img align=right src=/adm/lonIcons/lonlogos.gif>
   <h1>Search Catalog</h1>
   CATALOGBEGIN
           $r->print(<<CATALOGCONTROLS);
   <form name='results' method="post" action="/adm/searchcat">
   <input type='hidden' name='acts' value='' />
   <input type='button' value='Revise search request'
   onClick='this.form.submit();' />
   $importbutton
   $closebutton
   $persistent
   <hr />
   <h3>Search Query</h3>
   CATALOGCONTROLS
       if ($mode eq 'Basic') {
    $r->print(<<RESULTS);
   <p>
   <b>Basic search:</b> $ENV{'form.basicexp'}
   </p>
   RESULTS
       }
       elsif ($mode eq 'Advanced') {
    $r->print(<<RESULTS);
   <p>
   <b>Advanced search</b>
   $query
   </p>
   RESULTS
       }
       $r->print('<h3>Search Results</h3>');
       $r->rflush();
       my $servernum=(keys %rhash)+0;
   
       # define server grid (shows status of multiple machines)
       my $hcinit;
       my $grid="'<br />'+";
       $grid.="\n";
       my $sn=1;
       for my $sk (sort keys %rhash) {
    # '<a href="
    $grid.="'<a href=\"";
    # javascript:displayinfo('+
    $grid.="javascript:opener.displayinfo('+";
    # "'"+'key
    $grid.="\"'\"+'";
    $grid.=$sk." domain=".$hostdomains{$sk};
    my $hc;
    if ($rhash{$sk} eq 'con_lost') {
       $hc="!!!BAD CONNECTION, CONTACT SYSTEM ADMINISTRATOR!!!";
    }
    else {
       $hc="'+\"'\"+\"+hc['$sk']+\"+\"'\"+'";
       $hcinit.="hc[\"$sk\"]=0;";
    }
    $grid.=" hitcount=".$hc;
    $grid.=" IP=".$hostips{$sk};
    # '+"'"+'">'+
    $grid.="'+\"'\"+')\">'+";
    $grid.="\n";
    $grid.="'<img border=\"0\" name=\"img".$sn."\"".
       " src=\"/adm/lonIcons/srvbad.gif\" alt=\"".$sk."\" /></a>'+\n";
    $grid.="'<br />'+\n" unless $sn%10;
           $sn++;
       }
       $r->print(<<ENDPOP);
   <script>
       popwin=open('','popwin','scrollbars=1,width=400,height=200');
       popwin.focus();
       popwin.document.writeln('<'+'html>');
       popwin.document.writeln('<'+'head>');
       popwin.document.writeln('<'+'script>');
       popwin.document.writeln('hc=new Array();$hcinit');
       popwin.document.writeln('<'+'/script>');
       popwin.document.writeln('<'+'/head>'+
           '<'+'body bgcolor="#FFFFFF">'+
    '<'+'h3>Search Results Progress<'+'/h3>'+
           '<'+'form name="popremain">'+
           '<'+'br />Server space <'+'input type=text size=25 name=space value="">'+
           '<'+'br />Status <'+'input type=text size=25 name=status value="">'+
           '<'+'br />Maximum remaining time <'+'input type=text size=25 name=timeout '+
    'value="30">'+
           '<'+'tt>'+
    '<'+'image align="right" src="/adm/lonIcons/'+
    'lonanim.gif" '+
    'alt="animated logo" />'+
    '<'+'br /><i>PLEASE BE PATIENT</i>'+
    '<'+'br />SCANNING $servernum SERVERS'+
    '<'+'br clear="all" />Number of record hits found '+
    '<'+'input type="text" size="10" name="numhits"'+
    ' value="0" />'+
    '<'+'br clear="all" />Time elapsed '+
    '<'+'input type="text" size="10" name="elapsetime"'+
    ' value="0" />'+
    '<'+'br />'+
    'SERVER GRID (click on any cell for details)'+
           $grid
           '<'+'br />'+
    'Server details '+
    '<'+'input type="text" size="25" name="sdetails"'+
    ' value="" />'+
    '<'+'br />'+
    '<'+'input type="button" name="button"'+
    ' value="revise search" />'+
    ' <'+'input type="button" name="button"'+
    ' value="view results" />'+
    ' <'+'input type="button" name="button"'+
    ' value="help" />'+
    '<'+'/tt>'+
           '<'+'/form>'+
           '<'+'/body><'+'/html>');
       popwin.document.close();
   </script>
   ENDPOP
       $r->rflush();
   
       $r->print('<script>popwin.document.popremain.space.value="'.
         $servernum.', 0%, count=0/'.$servernum.'";</script>');
       $r->rflush(); 
       my $servercount=0;
       $sn=0;
       my $hitcountsum=0;
       foreach my $rkey (sort keys %rhash) {
    $sn++;
    $servercount++;
    $tflag=1;
    $compiledresult='';
    my $hostname=$rkey;
    $r->print('<script>popwin.document.popremain.status.value="'.
     $rkey.', trying contact";</script>'."\n");
    $r->rflush();
    my $reply=$rhash{$rkey};
    my @results;
   
    my $replyfile='';
   
    if ($reply eq 'con_lost') {
       my $percent=sprintf('%3.0f',($servercount/$servernum*100));
       $r->print('<script>popwin.document.popremain.space.value="'.
         $servernum.', '.$percent.'%, count='.$servercount.
         '/'.$servernum.'";</script>');
    }
    else {
       $reply=~/^([\.\w]+)$/; # must do since 'use strict' checks for tainting
       $replyfile=$r->dir_config('lonDaemons').'/tmp/'.$1;
       $reply=~/(.*?)\_/;
       {
    my $temp=0;
         WLOOP: while (1) {
     if (-e $replyfile && $tflag) {
         $r->print('<script>popwin.document.popremain.status.'.
    'value="'.$rkey.', transmitting";</script>'.
    "\n");
         $r->rflush();
         $r->print('<script>popwin.document.img'.$sn.'.'.
    'src="/adm/lonIcons/srvempty.gif";</script>'.
    "\n");
         $r->rflush();
         $tflag=0;
     }
     last WLOOP if $temp>5;
     if (-e "$replyfile.end") {
         if (-s $replyfile) {
     $r->print('<script>popwin.document.img'.$sn.'.'.
    'src="/adm/lonIcons/srvgood.gif";</script>'.
    "\n");
     $r->rflush();
     my $fh=Apache::File->new($replyfile) or 
         ($r->print('ERROR: file '.
    $replyfile.' cannot be opened') and
          return OK);
     @results=<$fh> if $fh;
     $hitcount{$rkey}=@results+0;
     $r->print('<script>popwin.hc["'.$rkey.'"]='.
       $hitcount{$rkey}.';</script>'.
       "\n");
     $r->rflush();
     $hitcountsum+=$hitcount{$rkey};
     $r->print('<script>popwin.document.forms.popremain.'.
       'numhits.value='.$hitcountsum.
       ';</script>'.
       "\n");
     $r->rflush();
         }
         last WLOOP;
     }
     last WLOOP unless $timeremain;
     sleep 1;
     $timeremain--;
     $elapsetime++;
     $r->print('<script>popwin.document.popremain.timeout.'.
       'value="'.$timeremain.'";</script>'."\n");
     $r->rflush();
     $r->print('<script>popwin.document.popremain.elapsetime.'.
       'value="'.$elapsetime.'";</script>'."\n");
     $r->rflush();
     $temp++;
         }
       }
    }
    my $customshow='';
    my $extrashow='';
    my @customfields;
    if ($ENV{'form.customshow'}) {
       $customshow=$ENV{'form.customshow'};
       $customshow=~s/[^\w\s]//g;
       my @fields=map {"<font color=\"#008000\">$_:</font><!-- $_ -->"} 
       split(/\s+/,$customshow);
       @customfields=split(/\s+/,$customshow);
       if ($customshow) {
    $extrashow="<ul><li>".join("</li><li>",@fields)."</li></ul>\n";
       }
    }
    my $customdata='';
    my %customhash;
    foreach my $result (@results) {
       if ($result=~/^(custom\=.*)$/) { # grab all custom metadata
    my $tmp=$result;
    $tmp=~s/^custom\=//;
    my ($k,$v)=map {&Apache::lonnet::unescape($_);
       } split(/\,/,$tmp);
    $customhash{$k}=$v;
       }
    }
    foreach my $result (@results) {
       next if $result=~/^custom\=/;
       chomp $result;
       next unless $result;
       my @fields=map
       {&Apache::lonnet::unescape($_)}
       (split(/\,/,$result));
       my ($title,$author,$subject,$url,$keywords,$version,
    $notes,$abstract,$mime,$lang,
    $creationdate,$lastrevisiondate,$owner,$copyright)=@fields;
       my $shortabstract=$abstract;
       $shortabstract=substr($abstract,0,200) if length($abstract)>200;
       $fields[7]=$shortabstract;
       my $extrashow2=$extrashow;
       if ($extrashow) {
    foreach my $field (@customfields) {
       my $value='';
       if ($customhash{$url}=~/\<${field}[^\>]*\>(.*?)\<\/${field}[^\>]*\>/s) {
           $value=$1;
       }
               $extrashow2=~s/\<\!\-\- $field \-\-\>/ $value/g;
           }
               }
   
               $compiledresult.=<<END if $compiledresult or $servercount!=$servernum;
   <hr align='left' width='200' noshade />
   END
               $compiledresult.=<<END;
   <p>
   END
               $compiledresult.=<<END if $ENV{'form.catalogmode'} eq 'interactive';
   <font size='-1'><INPUT TYPE="button" NAME="returnvalues" VALUE="SELECT"
   onClick="javascript:select_data('$title','$url')">
   </font>
   <br />
   END
               $compiledresult.=<<END if $ENV{'form.catalogmode'} eq 'groupsearch';
   <font size='-1'><input type="checkbox" name="returnvalues" value="SELECT"
   onClick="javascript:queue($fnum)" />
   </font>
   <input type="hidden" name="title$fnum" value="$title" />
   <input type="hidden" name="url$fnum" value="$url" />
   <br />
   END
               my $httphost=$ENV{'HTTP_HOST'};
   
               my $viewselect;
               if ($mode eq 'Basic') {
    $viewselect=$ENV{'form.basicviewselect'};
       }
               elsif ($mode eq 'Advanced') {
           $viewselect=$ENV{'form.advancedviewselect'};
               }
   
               if ($viewselect eq 'Detailed Citation View') {
           $compiledresult.=&detailed_citation_view(@fields,
    $hostname,$httphost,
    $extrashow2);
       }
               elsif ($viewselect eq 'Summary View') {
    $compiledresult.=&summary_view(@fields,$hostname,$httphost,
          $extrashow2);
       }
               elsif ($viewselect eq 'Fielded Format') {
    $compiledresult.=&fielded_format_view(@fields,$hostname,
         $httphost,$extrashow2);
       }
               elsif ($viewselect eq 'XML/SGML') {
    $compiledresult.=&xml_sgml_view(@fields,$hostname,$httphost,
    $extrashow2);
       }
       
           }
   
    if ($compiledresult) {
       $resultflag=1;
    }
   
    $r->print(<<RESULTS);
   $compiledresult
   RESULTS
           my $percent=sprintf('%3.0f',($servercount/$servernum*100));
    $r->print('<script>popwin.document.popremain.space.value="'.
             $servernum.', '.$percent.'%, count='.$servercount.
     '/'.$servernum.'";</script>'."\n");
       }
       unless ($resultflag) {
           $r->print("\nThere were no results that matched your query\n");
       }
   #    $r->print('<script>popwin.close()</script>'."\n"); $r->rflush(); 
       $r->print(<<RESULTS);
   </body>
   </html>
   RESULTS
   }
   
   # ------------------------------------------------------ Detailed Citation View
   sub detailed_citation_view {
       my ($title,$author,$subject,$url,$keywords,$version,
    $notes,$shortabstract,$mime,$lang,
    $creationdate,$lastrevisiondate,$owner,$copyright,
    $hostname,$httphost,$extrashow)=@_;
       my $result=<<END;
   <i>$owner</i>, last revised $lastrevisiondate
   <h3><A HREF="http://$httphost$url" TARGET='search_preview'>$title</A></h3>
   <h3>$author</h3>
   </p>
   <p>
   <b>Subject:</b> $subject<br />
   <b>Keyword(s):</b> $keywords<br />
   <b>Notes:</b> $notes<br />
   <b>MIME Type:</b> $mimetag{$mime}<br />
   <b>Language:</b> $language{$lang}<br />
   <b>Copyright/Distribution:</b> $cprtag{$copyright}<br />
   </p>
   $extrashow
   <p>
   $shortabstract
   </p>
   END
       return $result;
   }
   
   # ---------------------------------------------------------------- Summary View
   sub summary_view {
       my ($title,$author,$subject,$url,$keywords,$version,
    $notes,$shortabstract,$mime,$lang,
    $creationdate,$lastrevisiondate,$owner,$copyright,
    $hostname,$httphost,$extrashow)=@_;
       my $result=<<END;
   <a href="http://$httphost$url" TARGET='search_preview'>$author</a><br />
   $title<br />
   $owner -- $lastrevisiondate<br />
   $cprtag{$copyright}<br />
   $extrashow
   </p>
   END
       return $result;
   }
   
   # -------------------------------------------------------------- Fielded Format
   sub fielded_format_view {
       my ($title,$author,$subject,$url,$keywords,$version,
    $notes,$shortabstract,$mime,$lang,
    $creationdate,$lastrevisiondate,$owner,$copyright,
    $hostname,$httphost,$extrashow)=@_;
       my $result=<<END;
   <b>URL: </b> <A HREF="http://$httphost$url" TARGET='search_preview'>$url</A>
   <br />
   <b>Title:</b> $title<br />
   <b>Author(s):</b> $author<br />
   <b>Subject:</b> $subject<br />
   <b>Keyword(s):</b> $keywords<br />
   <b>Notes:</b> $notes<br />
   <b>MIME Type:</b> $mimetag{$mime}<br />
   <b>Language:</b> $language{$lang}<br />
   <b>Creation Date:</b> $creationdate<br />
   <b>Last Revision Date:</b> $lastrevisiondate<br />
   <b>Publisher/Owner:</b> $owner<br />
   <b>Copyright/Distribution:</b> $cprtag{$copyright}<br />
   <b>Repository Location:</b> $hostname<br />
   <b>Abstract:</b> $shortabstract<br />
   $extrashow
   </p>
   END
       return $result;
   }
   
   # -------------------------------------------------------------------- XML/SGML
   sub xml_sgml_view {
       my ($title,$author,$subject,$url,$keywords,$version,
    $notes,$shortabstract,$mime,$lang,
    $creationdate,$lastrevisiondate,$owner,$copyright,
    $hostname,$httphost,$extrashow)=@_;
       my $result=<<END;
   <pre>
   &lt;LonCapaResource&gt;
   &lt;url&gt;$url&lt;/url&gt;
   &lt;title&gt;$title&lt;/title&gt;
   &lt;author&gt;$author&lt;/author&gt;
   &lt;subject&gt;$subject&lt;/subject&gt;
   &lt;keywords&gt;$keywords&lt;/keywords&gt;
   &lt;notes&gt;$notes&lt;/notes&gt;
   &lt;mimeInfo&gt;
   &lt;mime&gt;$mime&lt;/mime&gt;
   &lt;mimetag&gt;$mimetag{$mime}&lt;/mimetag&gt;
   &lt;/mimeInfo&gt;
   &lt;languageInfo&gt;
   &lt;language&gt;$lang&lt;/language&gt;
   &lt;languagetag&gt;$language{$lang}&lt;/languagetag&gt;
   &lt;/languageInfo&gt;
   &lt;creationdate&gt;$creationdate&lt;/creationdate&gt;
   &lt;lastrevisiondate&gt;$lastrevisiondate&lt;/lastrevisiondate&gt;
   &lt;owner&gt;$owner&lt;/owner&gt;
   &lt;copyrightInfo&gt;
   &lt;copyright&gt;$copyright&lt;/copyright&gt;
   &lt;copyrighttag&gt;$cprtag{$copyright}&lt;/copyrighttag&gt;
   &lt;/copyrightInfo&gt;
   &lt;repositoryLocation&gt;$hostname&lt;/repositoryLocation&gt;
   &lt;shortabstract&gt;$shortabstract&lt;/shortabstract&gt;
   &lt;/LonCapaResource&gt;
   </pre>
   $extrashow
   END
       return $result;
   }
   
   # ---------------------------------------------------- see if a field is filled
   sub filled {
       my ($field)=@_;
       if ($field=~/\S/ && $field ne 'any') {
    return 1;
       }
       else {
    return 0;
       }
   }
   
   # ---------------- Message to output when there are not enough fields filled in
   sub output_blank_field_error {
       my ($r)=@_;
       # make query information persistent to allow for subsequent revision
       my $persistent=&make_persistent();
   
       $r->print(<<BEGINNING);
   <html>
   <head>
   <title>The LearningOnline Network with CAPA</title>
   BEGINNING
       $r->print(<<RESULTS);
   </head>
   <body bgcolor="#ffffff">
   <img align='right' src='/adm/lonIcons/lonlogos.gif' />
   <h1>Search Catalog</h1>
   <form method="post" action="/adm/searchcat">
   $persistent
   <input type='button' value='Revise search request'
   onClick='this.form.submit();' />
   $closebutton
   <hr />
   <h3>Helpful Message</h3>
   <p>
   Incorrect search query due to blank entry fields.
   You need to fill in the relevant
   fields on the search page in order for a query to be
   processed.
   </p>
   </body>
   </html>
   RESULTS
   }
   
   # ----------------------------------------------------------- Output date error
   sub output_date_error {
       my ($r,$message)=@_;
       # make query information persistent to allow for subsequent revision
       my $persistent=&make_persistent();
   
       $r->print(<<BEGINNING);
   <html>
   <head>
   <title>The LearningOnline Network with CAPA</title>
   BEGINNING
       $r->print(<<RESULTS);
   </head>
   <body bgcolor="#ffffff">
   <img align='right' src='/adm/lonIcons/lonlogos.gif' />
   <h1>Search Catalog</h1>
   <form method="post" action="/adm/searchcat">
   $persistent
   <input type='button' value='Revise search request'
   onClick='this.form.submit();' />
   $closebutton
   <hr />
   <h3>Helpful Message</h3>
   <p>
   $message
   </p>
   </body>
   </html>
   RESULTS
   }
   
 1;  1;
   
 __END__  __END__
Removed from v.1.3  
changed lines
  Added in v.1.98

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