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Diff for /loncom/interface/lonsearchcat.pm between versions 1.80 and 1.124

version 1.80, 2001/03/27 02:51:15 version 1.124, 2002/06/20 14:31:31
Line 1 Line 1
 # The LearningOnline Network  # The LearningOnline Network with CAPA
 # Search Catalog  # Search Catalog
 #  #
 # 03/08/2001 Scott Harrison  # $Id$
 # Scott Harrison: 03/12/2001, 03/13/2001, 03/14/2001, 03/15/2001, 03/19/2001  
 # Scott Harrison: 03/20/2001  
 #  #
 # Functions  # Copyright Michigan State University Board of Trustees
 #  #
 # handler(server reference) : interacts with the Apache server layer  # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
 #                             (for /adm/searchcat URLs)  #
 # simpletextfield(name,value) : returns HTML formatted string for simple text  # LON-CAPA is free software; you can redistribute it and/or modify
 #                               field  # it under the terms of the GNU General Public License as published by
 # simplecheckbox(name,value) : returns HTML formatted string for simple  # the Free Software Foundation; either version 2 of the License, or
 #                              checkbox  # (at your option) any later version.
 # searchphrasefield(title,name,value) : returns HTML formatted string for  #
 #                                       a search expression phrase field  # LON-CAPA is distributed in the hope that it will be useful,
 # dateboxes(name, defaultmonth, defaultday, defaultyear) : returns HTML  # but WITHOUT ANY WARRANTY; without even the implied warranty of
 #                                                          formatted string  # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 #                                                          for a calendar date  # GNU General Public License for more details.
 # selectbox(title,name,value,%HASH=options) : returns HTML formatted string for  #
 #                                             a selection box field  # You should have received a copy of the GNU General Public License
 # advancedsearch(server reference, environment reference) : perform a complex  # along with LON-CAPA; if not, write to the Free Software
 #                                  multi-field logical query  # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 # filled(field) : determines whether a given field has been filled  #
 # basicsearch(server reference, environment reference) : perform a simple  # /home/httpd/html/adm/gpl.txt
 #                               single-field logical query  #
 # output_blank_field_error(server reference) : outputs a message saying that  # http://www.lon-capa.org/
 #                                              more fields need to be filled in  #
 # output_results(output mode,  # YEAR=2001
 #                server reference,   # 3/8, 3/12, 3/13, 3/14, 3/15, 3/19 Scott Harrison
 #                environment reference,  # 3/20, 3/21, 3/22, 3/26, 3/27, 4/2, 8/15, 8/24, 8/25 Scott Harrison
 #                reply list reference) : outputs results from search  # 10/12,10/14,10/15,10/16,11/28,11/29,12/10,12/12,12/16 Scott Harrison
 # build_SQL_query(field name, logic) : builds a SQL query string from a  # YEAR=2002
 #                                      logical expression with AND/OR keywords  # 1/17 Scott Harrison
 # recursive_SQL_query_build(field name, reverse notation expression) :   # 6/17 Matthew Hall
 #                 builds a SQL query string from a reverse notation expression  #
 #                 logical expression with AND/OR keywords  ###############################################################################
   ###############################################################################
   
   =pod 
   
   =head1 NAME
   
   lonsearchcat
   
   =head1 SYNOPSIS
   
   Search interface to LON-CAPAs digital library
   
   =head1 DESCRIPTION
   
   This module enables searching for a distributed browseable catalog.
   
   This is part of the LearningOnline Network with CAPA project
   described at http://www.lon-capa.org.
   
   lonsearchcat presents the user with an interface to search the LON-CAPA
   digital library.  lonsearchcat also initiates the execution of a search
   by sending the search parameters to LON-CAPA servers.  The progress of 
   search (on a server basis) is displayed to the user in a seperate window.
   
   =head1 Internals
   
   =over 4
   
   =cut
   
   ###############################################################################
   ###############################################################################
   
   ##                                                                           ##
   ## ORGANIZATION OF THIS PERL MODULE                                          ##
   ##                                                                           ##
   ## 1. Modules used by this module                                            ##
   ## 2. Choices for different output views (detailed, summary, xml, etc)       ##
   ## 3. BEGIN block (to be run once after compilation)                         ##
   ## 4. Handling routine called via Apache and mod_perl                        ##
   ## 5. Other subroutines                                                      ##
   ##                                                                           ##
   ###############################################################################
   
 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::lonnet();
 use Apache::File();  use Apache::File();
 use CGI qw(:standard);  use CGI qw(:standard);
 use Text::Query;  use Text::Query;
   use GDBM_File;
   use Apache::loncommon();
   
 my %language;  # ---------------------------------------- variables used throughout the module
 my $scrout;  
 my %metadatafields;  ######################################################################
 my %cprtag;  ######################################################################
 my %mimetag;  
 my $closebutton;  =pod 
 my $basicviewselect=<<END;  
 <select name='basicviewselect'>  =item Global variables
 <option value='Detailed Citation View'>Detailed Citation View</option>  
 <option value='Summary View'>Summary View</option>  =over 4
 <option value='Fielded Format'>Fielded Format</option>  
 <option value='XML/SGML'>XML/SGML</option>  =item %hostdomains
 </select>  
 END  matches host name to host domain
 my $advancedviewselect=<<END;  
 <select name='advancedviewselect'>  =item %hostips
 <option value='Detailed Citation View'>Detailed Citation View</option>  
 <option value='Summary View'>Summary View</option>  matches host name to host ip
 <option value='Fielded Format'>Fielded Format</option>  
 <option value='XML/SGML'>XML/SGML</option>  =item %hitcount
 </select>  
 END  stores number of hits per host
   
   =item $closebutton
   
   button that closes the search window
   
   =item $importbutton
   
   button to take the selecte results and go to group sorting
   
   =item %hash   
   
   The ubiquitous database hash
   
   =item $diropendb 
   
   The full path to the (temporary) search database file.  This is set and
   used in &handler() and is also used in &output_results().
   
   =back 
   
   =cut
   
   ######################################################################
   ######################################################################
   
   # -- information holders
   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 $yourself; # allows for quickly limiting to oneself
   my %hash;     # database hash
   
   # ------------------------------------------ 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
   
   #------------------------------------------------------------- global variables
   my $diropendb = "";
   my $domain = "";
   
   # ----------------------------------------------------------------------- BEGIN
   
   =pod
   
   =item BEGIN block
   
   Load %hostdomains and %hostips with data from lonnet.pm.  Only library
   servers are considered.
   
   =cut
   
   BEGIN {
       foreach (keys (%Apache::lonnet::libserv)) {
           $hostdomains{$_}=$Apache::lonnet::hostdom{$_};
           $hostips{$_}=$Apache::lonnet::hostip{$_};
       }
   }
   
   ######################################################################
   ######################################################################
   
   =pod 
   
   =item &handler() - main handler invoked by httpd child
   
   =item Variables
   
   =over 4
   
   =item $hidden
   
   holds 'hidden' html forms
   
   =item $scrout
   
   string that holds portions of the screen output
   
   =back 
   
   =cut
   
   ######################################################################
   ######################################################################
 sub handler {  sub handler {
     my $r = shift;      my $r = shift;
       untie %hash;
 # -------------------------------------- see if called from an interactive mode  
     map {  
        my ($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'}));  
   
     $r->content_type('text/html');      $r->content_type('text/html');
     $r->send_http_header;      $r->send_http_header;
     return OK if $r->header_only;      return OK if $r->header_only;
   
     %metadatafields=();      my $domain  = $r->dir_config('lonDefDomain');
       $diropendb= "/home/httpd/perl/tmp/".&Apache::lonnet::escape($domain).
     my $hidden='';              "\_".&Apache::lonnet::escape($ENV{'user.name'})."_searchcat.db";
     $hidden=<<END if $ENV{'form.catalogmode'} eq 'interactive';  
 <input type='hidden' name='catalogmode' value='interactive'>      &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
                ['catalogmode','launch','acts','mode','form','element',
                 'reqinterface']);
       ##
       ## Clear out old values from database
       ##
       if ($ENV{'form.launch'} eq '1') {
    if (tie(%hash,'GDBM_File',$diropendb,&GDBM_WRCREAT,0640)) {
       &start_fresh_session();
       untie %hash;
    } else {
       $r->print('<html><head></head><body>Unable to tie hash to db '.
         'file</body></html>');
       return OK;
    }
       }
       ##
       ## Produce some output, so people know it is working
       ##
       $r->print("\n");
       $r->rflush;
       ##
       ## Configure dynamic components of interface
       ##
       my $hidden;       # Holds 'hidden' html forms
       if ($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  END
           $closebutton=<<END;
     $closebutton=<<END if $ENV{'form.catalogmode'} eq 'interactive';  <input type='button' name='close' value='CLOSE' onClick='self.close()'>
 <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  END
   
 # ------------------------------------------------ First, check out environment  
     $metadatafields{'owner'}=$ENV{'user.name'}.'@'.$ENV{'user.domain'};  
   
 # --------------------------------- Compute various listings of metadata values  
       
     %language=();  
     $language{'any'}='Any language';  
     {  
  my $fh=Apache::File->new($r->dir_config('lonTabDir').'/language.tab');  
  map {  
     $_=~/(\w+)\s+([\w\s\-]+)/; chomp;  
     $language{$1}=$2;  
  } <$fh>;  
     }  
   
     %cprtag=();  
     $cprtag{'any'}='Any copyright/distribution';  
     {  
  my $fh=Apache::File->new($r->dir_config('lonIncludes').'/copyright.tab');  
  map {  
     $_=~/(\w+)\s+([\w\s\-]+)/; chomp;  
     $cprtag{$1}=$2;  
  } <$fh>;  
     }  
   
     %mimetag=();  
     $mimetag{'any'}='Any type';  
     {  
  my $fh=Apache::File->new($r->dir_config('lonTabDir').'/filetypes.tab');  
  map {  
     $_=~/(\w+)\s+(\w+)\s+([\w\s\-]+)/; chomp;  
     $mimetag{$1}=".$1 $3";  
  } <$fh>;  
     }      }
       $hidden .= <<END;
   <input type='hidden' name='mode'    value='$ENV{'form.mode'}'>
   <input type='hidden' name='form'    value='$ENV{'form.form'}'>
   <input type='hidden' name='element' value='$ENV{'form.element'}'>
   <input type='hidden' name='date' value='2'>
   END
       ##
       ##  What are we doing?
       ##
     if ($ENV{'form.basicsubmit'} eq 'SEARCH') {      if ($ENV{'form.basicsubmit'} eq 'SEARCH') {
  return &basicsearch($r,\%ENV);          # Perform basic search and give results
    return &basicsearch($r,\%ENV,$hidden);
       } elsif ($ENV{'form.advancedsubmit'} eq 'SEARCH') {
           # Perform advanced search and give results
    return &advancedsearch($r,\%ENV,$hidden);
       } elsif ($ENV{'form.reqinterface'} eq 'advanced') {
           # Output the advanced interface
           $r->print(&advanced_search_form($closebutton,$hidden));
           return OK;
       } else { 
           # Output normal search interface
           $r->print(&basic_search_form($closebutton,$hidden));
     }      }
     elsif ($ENV{'form.advancedsubmit'} eq 'SEARCH') {      return OK;
  return &advancedsearch($r,\%ENV);  } 
   
   ######################################################################
   ######################################################################
   
   =pod 
   
   =item &basic_search_form() 
   
   Returns a scalar which holds html for the basic search form.
   
   =cut
   
   ######################################################################
   ######################################################################
   
   sub basic_search_form{
       my ($closebutton,$hidden) = @_;
       my $scrout=<<"ENDDOCUMENT";
   <html>
   <head>
   <title>The LearningOnline Network with CAPA</title>
   <script type="text/javascript">
       function openhelp(val) {
    openhelpwin=open('/adm/help/searchcat.html','helpscreen',
        'scrollbars=1,width=600,height=300');
    openhelpwin.focus();
     }      }
   </script>
   </head>
   <body bgcolor="#FFFFFF">
   <img align='right' src='/adm/lonIcons/lonlogos.gif' />
   <h1>Search Catalog</h1>
   <form method="post" action="/adm/searchcat">
   $hidden
   <h3>Basic Search</h3>
   <p>
   Enter terms or phrases separated by AND, OR, or NOT then press SEARCH below.
   </p>
   <p>
   <table>
   <tr><td>
   ENDDOCUMENT
       $scrout.='&nbsp;'.&simpletextfield('basicexp',$ENV{'form.basicexp'},40).
           '&nbsp;';
   #    $scrout.=&simplecheckbox('allversions',$ENV{'form.allversions'});
   #    $scrout.='<font color="#800000">Search historic archives</font>';
       $scrout.=<<ENDDOCUMENT;
   </td><td><a href="/adm/searchcat?reqinterface=advanced">Advanced Search</a></td></tr></table>
   </p>
   <p>
   &nbsp;<input type="submit" name="basicsubmit" value='SEARCH' />&nbsp;
   $closebutton
   <!-- basic view selection -->
   <select name='basicviewselect'>
   <option value='Detailed Citation View' selected="true">
   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 of basic view selection -->
   <input type="button" value="HELP" onClick="openhelp()" />
   </p>
   </form>
   </body>
   </html>
   ENDDOCUMENT
       return $scrout;
   }
   ######################################################################
   ######################################################################
   
   =pod 
   
   =item &advanced_search_form() 
   
     $scrout=''; # building a part of screen output  Returns a scalar which holds html for the advanced search form.
   
   =cut
   
   ######################################################################
   ######################################################################
   
   sub advanced_search_form{
       my ($closebutton,$hidden) = @_;
       my $scrout=<<"ENDHEADER";
   <html>
   <head>
   <title>The LearningOnline Network with CAPA</title>
   <script type="text/javascript">
       function openhelp(val) {
    openhelpwin=open('/adm/help/searchcat.html','helpscreen',
        'scrollbars=1,width=600,height=300');
    openhelpwin.focus();
       }
   </script>
   </head>
   <body bgcolor="#FFFFFF">
   <img align='right' src='/adm/lonIcons/lonlogos.gif' />
   <h1>Search Catalog</h1>
   <form method="post" action="/adm/searchcat">
   $hidden
   <hr />
   <h3>Advanced Search</h3>
   ENDHEADER
     $scrout.=&searchphrasefield('Limit by title','title',      $scrout.=&searchphrasefield('Limit by title','title',
  $ENV{'form.title'});   $ENV{'form.title'});
   
     $scrout.=&searchphrasefield('Limit by author','author',      $scrout.=&searchphrasefield('Limit by author','author',
  $ENV{'form.author'});   $ENV{'form.author'});
   
     $scrout.=&searchphrasefield('Limit by subject','subject',      $scrout.=&searchphrasefield('Limit by subject','subject',
  $ENV{'form.subject'});   $ENV{'form.subject'});
   
     $scrout.=&searchphrasefield('Limit by keywords','keywords',      $scrout.=&searchphrasefield('Limit by keywords','keywords',
  $ENV{'form.keywords'});   $ENV{'form.keywords'});
   
     $scrout.=&searchphrasefield('Limit by URL','url',      $scrout.=&searchphrasefield('Limit by URL','url',
  $ENV{'form.url'});   $ENV{'form.url'});
   #    $scrout.=&searchphrasefield('Limit by version','version',
     $scrout.=&searchphrasefield('Limit by version','version',  # $ENV{'form.version'});
  $ENV{'form.version'});  
   
     $scrout.=&searchphrasefield('Limit by notes','notes',      $scrout.=&searchphrasefield('Limit by notes','notes',
  $ENV{'form.notes'});   $ENV{'form.notes'});
   
     $scrout.=&searchphrasefield('Limit by abstract','abstract',      $scrout.=&searchphrasefield('Limit by abstract','abstract',
  $ENV{'form.abstract'});   $ENV{'form.abstract'});
       $ENV{'form.mime'}='any' unless length($ENV{'form.mime'});
     $ENV{'form.mime'}='notxxx' unless length($ENV{'form.mime'});  
     $scrout.=&selectbox('Limit by MIME type','mime',      $scrout.=&selectbox('Limit by MIME type','mime',
  $ENV{'form.mime'},%mimetag);   $ENV{'form.mime'},
    'any','Any type',
    \&{Apache::loncommon::filedescriptionex},
    (&Apache::loncommon::fileextensions));
     $ENV{'form.language'}='any' unless length($ENV{'form.language'});      $ENV{'form.language'}='any' unless length($ENV{'form.language'});
   
     $scrout.=&selectbox('Limit by language','language',      $scrout.=&selectbox('Limit by language','language',
  $ENV{'form.language'},%language);   $ENV{'form.language'},'any','Any Language',
        \&{Apache::loncommon::languagedescription},
    (&Apache::loncommon::languageids),
    );
 # ------------------------------------------------ Compute date selection boxes  # ------------------------------------------------ Compute date selection boxes
     $scrout.=<<CREATIONDATESTART;      $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:  between:
 CREATIONDATESTART  CREATIONDATESTART
     $scrout.=&dateboxes('creationdatestart',1,1,1976,      $scrout.=&dateboxes('creationdatestart',1,1,1976,
Line 187  CREATIONDATESTART Line 428  CREATIONDATESTART
  $ENV{'form.creationdatestart_day'},   $ENV{'form.creationdatestart_day'},
  $ENV{'form.creationdatestart_year'},   $ENV{'form.creationdatestart_year'},
  );   );
     $scrout.=<<CREATIONDATEEND;      $scrout.="and:\n";
 and:  
 CREATIONDATEEND  
     $scrout.=&dateboxes('creationdateend',12,31,2051,      $scrout.=&dateboxes('creationdateend',12,31,2051,
  $ENV{'form.creationdateend_month'},   $ENV{'form.creationdateend_month'},
  $ENV{'form.creationdateend_day'},   $ENV{'form.creationdateend_day'},
  $ENV{'form.creationdateend_year'},   $ENV{'form.creationdateend_year'},
  );   );
     $scrout.="</p>";      $scrout.="</p>";
   
     $scrout.=<<LASTREVISIONDATESTART;      $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:  <br />between:
 LASTREVISIONDATESTART  LASTREVISIONDATESTART
     $scrout.=&dateboxes('lastrevisiondatestart',1,1,1976,      $scrout.=&dateboxes('lastrevisiondatestart',1,1,1976,
  $ENV{'form.lastrevisiondatestart_month'},   $ENV{'form.lastrevisiondatestart_month'},
Line 217  LASTREVISIONDATEEND Line 455  LASTREVISIONDATEEND
  $ENV{'form.lastrevisiondateend_year'},   $ENV{'form.lastrevisiondateend_year'},
  );   );
     $scrout.='</p>';      $scrout.='</p>';
   
     $scrout.=&searchphrasefield('Limit by publisher/owner','owner',      $scrout.=&searchphrasefield('Limit by publisher/owner','owner',
  $ENV{'form.owner'});   $ENV{'form.owner'});
 # $metadatafields{'owner'});  
   
     $ENV{'form.copyright'}='any' unless length($ENV{'form.copyright'});      $ENV{'form.copyright'}='any' unless length($ENV{'form.copyright'});
     $scrout.=&selectbox('Limit by copyright/distribution','copyright',      $scrout.=&selectbox('Limit by copyright/distribution','copyright',
  $ENV{'form.copyright'},%cprtag);   $ENV{'form.copyright'},
    'any','Any copyright/distribution',
    \&{Apache::loncommon::copyrightdescription},
    (&Apache::loncommon::copyrightids),
    );
 # ------------------------------------------- Compute customized metadata field  # ------------------------------------------- Compute customized metadata field
     $scrout.=<<CUSTOMMETADATA;      $scrout.=<<CUSTOMMETADATA;
 <p>  <p>
 <font color="#800000" face="helvetica"><b>LIMIT BY SPECIAL METADATA FIELDS:</b>  <font color="#800000" face="helvetica"><b>LIMIT BY SPECIAL METADATA FIELDS:</b>
 </font>  </font>
 For resource-specific metadata, enter in an expression in the form of   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>  <i>key</i>=<i>value</i> separated by operators such as AND, OR or NOT.<br />
 <b>Example:</b> grandmother=75 OR grandfather=85  <b>Example:</b> grandmother=75 OR grandfather=85
 <br>  <br />
 CUSTOMMETADATA  CUSTOMMETADATA
 $scrout.=&simpletextfield('custommetadata',$ENV{'form.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;      $scrout.=<<CUSTOMSHOW;
 <p>  <p>
 <font color="#800000" face="helvetica"><b>SHOW SPECIAL METADATA FIELDS:</b>  <font color="#800000" face="helvetica"><b>SHOW SPECIAL METADATA FIELDS:</b>
 </font>  </font>
 Enter in a space-separated list of special metadata fields to show  Enter in a space-separated list of special metadata fields to show
 in a fielded listing for each record result.  in a fielded listing for each record result.
 <br>  <br />
 CUSTOMSHOW  CUSTOMSHOW
 $scrout.=&simpletextfield('customshow',$ENV{'form.customshow'});      $scrout.=&simpletextfield('customshow',$ENV{'form.customshow'});
 $scrout.=' <i>initial users of this system do not need to worry about this option</i>';      $scrout.=<<ENDDOCUMENT;
   
 # ---------------------------------------------------------------- Print screen  
     $r->print(<<ENDDOCUMENT);  
 <html>  
 <head>  
 <title>The LearningOnline Network with CAPA</title>  
 </head>  
 <body bgcolor="#FFFFFF">  
 <img align=right src=/adm/lonIcons/lonlogos.gif>  
 <h1>Search Catalog</h1>  
 <form method="post" action="/adm/searchcat">  
 $hidden  
 <hr>  
 <h3>Basic Search</h3>  
 <p>  
 Enter terms or phrases separated by search operators  
 such as AND or OR then press SEARCH below.  Terms should be specific  
 to the title, author, subject, notes, or abstract information associated  
 with a resource.  
 <br>  
 ENDDOCUMENT  
     $r->print(&simpletextfield('basicexp',$ENV{'form.basicexp'}));  
     $r->print(' ');  
     $r->print(&simplecheckbox('titleonly',$ENV{'form.titleonly'}));  
     $r->print('<font color="#800000">Title only</font> ');  
     $r->print(&simplecheckbox('allversions',$ENV{'form.allversions'}));  
     $r->print(<<ENDDOCUMENT);  
 <font color="#800000">Search historic archives</font>  
 <br>  
 <input type="submit" name="basicsubmit" value='SEARCH' />  
 <input type="reset" name="reset" value='RESET' />  
 $closebutton  
 $basicviewselect  
 </p>  
 <hr>  
 <h3>Advanced Search</h3>  
 $scrout  
 <p>  <p>
 <input type="submit" name="advancedsubmit" value='SEARCH' />  <input type="submit" name="advancedsubmit" value='SEARCH' />
 <input type="reset" name="reset" value='RESET' />  <input type="reset" name="reset" value='RESET' />
 $closebutton  $closebutton
 $advancedviewselect  <!-- advance view select -->
   <select name='advancedviewselect'>
   <option value='Detailed Citation View' selected="true">
   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 of advanced view select -->
   <input type="button" value="HELP" onClick="openhelp()" />
 </p>  </p>
 </form>  </form>
 </body>  </body>
 </html>  </html>
 ENDDOCUMENT  ENDDOCUMENT
     return OK;      return $scrout;
 }   }
   
   ######################################################################
   ######################################################################
   
   =pod 
   
 # --------------------------------------------------------- Various form fields  =item &make_persistent() 
   
   Returns a scalar which holds the current ENV{'form.*'} values in
   a 'hidden' html input tag.  
   
   =cut
   
   ######################################################################
   ######################################################################
   
   sub make_persistent {
       my $persistent='';
       
       foreach (keys %ENV) {
    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
           }
       }
       return $persistent;
   }
   
   
   ######################################################################
   ######################################################################
   
   =pod 
   
   =item HTML form building functions
   
   =over 4
   
   =item &simpletextfield() 
   
   Inputs: $name,$value,$size
   
   Returns a text input field with the given name, value, and size.  
   If size is not specified, a value of 20 is used.
   
   =item &simplecheckbox()
   
   Inputs: $name,$value
   
   Returns a simple check box with the given $name.
   If $value eq 'on' the box is checked.
   
   =item &searchphrasefield()
   
   Inputs: $title,$name,$value
   
   Returns html for a title line and an input field for entering search terms.
   the instructions "Enter terms or phrases separated by search operators such 
   as AND, OR, or NOT." are given following the title.  The entry field (which
   is where the $name and $value are used) is an 80 column simpletextfield.
   
   =item &dateboxes()
   
   =item &selectbox()
   
   =back 
   
   =cut
   
   ######################################################################
   ######################################################################
   
 sub simpletextfield {  sub simpletextfield {
     my ($name,$value)=@_;      my ($name,$value,$size)=@_;
     return '<input type=text name=\''.$name.      $size = 20 if (! defined($size));
    '\' size=20 value=\''.$value.'\' />';      return '<input type="text" name="'.$name.
           '" size="'.$size.'" value="'.$value.'" />';
 }  }
   
 sub simplecheckbox {  sub simplecheckbox {
     my ($name,$value)=@_;      my ($name,$value)=@_;
     my $checked='';      my $checked='';
     $checked="CHECKED" if $value eq 'on';      $checked="CHECKED" if $value eq 'on';
     return '<input type=checkbox name=\''.$name.'\' '. $checked . '>';      return '<input type="checkbox" name="'.$name.'" '. $checked . ' />';
 }  }
   
 sub searchphrasefield {  sub searchphrasefield {
     my ($title,$name,$value)=@_;      my ($title,$name,$value)=@_;
     my $instruction=<<END;      my $instruction=<<END;
 Enter terms or phrases separated by search operators such  Enter terms or phrases separated by search operators such as AND, OR, or NOT.
 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".
    "</FONT> $instruction<br>".          '<p><font color="#800000" face="helvetica"><b>'.$uctitle.':</b>'.
            '<input type=text name="'.$name.'" size=80 value=\''.$value.'\'>';          "</FONT> $instruction<br />".&simpletextfield($name,$value,80);
 }  }
   
 sub dateboxes {  sub dateboxes {
     my ($name,$defaultmonth,$defaultday,$defaultyear,      my ($name,$defaultmonth,$defaultday,$defaultyear,
  $currentmonth,$currentday,$currentyear)=@_;   $currentmonth,$currentday,$currentyear)=@_;
     ($defaultmonth,$defaultday,$defaultyear)=('','','');      ($defaultmonth,$defaultday,$defaultyear)=('','','');
     my $month=<<END;      #
 <select name="${name}_month">      # Day
 <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;      my $day=<<END;
 <select name="${name}_day">  <select name="${name}_day">
 <option value='$defaultday'> </option>  <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  END
       for (my $i = 1; $i<=31; $i++) {
    $day.="<option value=\"$i\">$i</option>\n";
       }
       $day.="</select>\n";
     $day=~s/(\"$currentday\")/$1 SELECTED/ if length($currentday);      $day=~s/(\"$currentday\")/$1 SELECTED/ if length($currentday);
       #
       # Month
       my $month=<<END;
   <select name="${name}_month">
   <option value='$defaultmonth'> </option>
   END
       my $i = 1;
       foreach (qw/January February March April May June 
        July August September October November December /){
    $month .="<option value=\"$i\">$_</option>\n";
    $i++;
       }
       $month.="</select>\n";
       $month=~s/(\"$currentmonth\")/$1 SELECTED/ if length($currentmonth);
       #
       # Year (obviously)
     my $year=<<END;      my $year=<<END;
 <select name="${name}_year">  <select name="${name}_year">
 <option value='$defaultyear'> </option>  <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  END
       my $maxyear = 2051; 
       for (my $i = 1976; $i<=$maxyear; $i++) {
    $year.="<option value=\"$i\">$i</option>\n";
       }
       $year.="</select>\n";
     $year=~s/(\"$currentyear\")/$1 SELECTED/ if length($currentyear);      $year=~s/(\"$currentyear\")/$1 SELECTED/ if length($currentyear);
     return "$month$day$year";      return "$month$day$year";
 }  }
   
 sub selectbox {  sub selectbox {
     my ($title,$name,$value,%options)=@_;      my ($title,$name,$value,$anyvalue,$anytag,$functionref,@idlist)=@_;
     my $uctitle=uc($title);      my $uctitle=uc($title);
     my $selout="\n<p><font color=\"#800000\" face=\"helvetica\"><b>$uctitle:".      my $selout="\n".'<p><font color="#800000" face="helvetica">'.
  "</b></font><br>".'<select name="'.$name.'">';          '<b>'.$uctitle.':</b></font><br /><select name="'.$name.'">';
     map {      foreach ($anyvalue,@idlist) {
         $selout.='<option value=\''.$_.'\'';          $selout.='<option value="'.$_.'"';
         if ($_ eq $value) { $selout.=' selected'; }          if ($_ eq $value and !/^any$/) {
         $selout.='>'.$options{$_}.'</option>';      $selout.=' selected >'.&{$functionref}($_).'</option>';
     } sort keys %options;   }
    elsif ($_ eq $value and /^$anyvalue$/) {
       $selout.=' selected >'.$anytag.'</option>';
    }
           else {$selout.='>'.&{$functionref}($_).'</option>';}
       }
     return $selout.'</select>';      return $selout.'</select>';
 }  }
   
 # ----------------------------------------------- Performing an advanced search  ######################################################################
   ######################################################################
   
   =pod 
   
   =item &advancedsearch() 
   
   =cut
   
   ######################################################################
   ######################################################################
 sub advancedsearch {  sub advancedsearch {
     my ($r,$envhash)=@_;      my ($r,$envhash,$hidden)=@_;
     my %ENV=%{$envhash};      my %ENV=%{$envhash};
   
     my $fillflag=0;      my $fillflag=0;
     # Clean up fields for safety      # Clean up fields for safety
     for my $field ('title','author','subject','keywords','url','version',      for my $field ('title','author','subject','keywords','url','version',
Line 499  sub advancedsearch { Line 695  sub advancedsearch {
    'lastrevisiondateend_day','lastrevisiondateend_year',     'lastrevisiondateend_day','lastrevisiondateend_year',
    'notes','abstract','mime','language','owner',     'notes','abstract','mime','language','owner',
    'custommetadata','customshow') {     'custommetadata','customshow') {
  $ENV{"form.$field"}=~s/[^\w\s\(\)\=\-\"\']//g;   $ENV{"form.$field"}=~s/[^\w\/\s\(\)\=\-\"\']//g;
     }      }
       foreach ('mode','form','element') {
    # is this required?  Hmmm.
    next unless (exists($ENV{"form.$_"}));
    $ENV{"form.$_"}=&Apache::lonnet::unescape($ENV{"form.$_"});
    $ENV{"form.$_"}=~s/[^\w\/\s\(\)\=\-\"\']//g;
       }
       # Check to see if enough information was filled in
     for my $field ('title','author','subject','keywords','url','version',      for my $field ('title','author','subject','keywords','url','version',
    'notes','abstract','mime','language','owner',     'notes','abstract','mime','language','owner',
    'custommetadata') {     'custommetadata') {
Line 508  sub advancedsearch { Line 711  sub advancedsearch {
     $fillflag++;      $fillflag++;
  }   }
     }      }
   
     unless ($fillflag) {      unless ($fillflag) {
  &output_blank_field_error($r);   &output_blank_field_error($r);
  return OK;   return OK;
     }      }
       # Turn the form input into a SQL-based query
     my $query='';      my $query='';
   
     my @queries;      my @queries;
     # Go through logical expression AND/OR/NOT phrase fields.      # Evaluate logical expression AND/OR/NOT phrase fields.
   
     foreach my $field ('title','author','subject','notes','abstract','url',      foreach my $field ('title','author','subject','notes','abstract','url',
        'keywords','version','owner') {         'keywords','version','owner') {
  if ($ENV{'form.'.$field}) {   if ($ENV{'form.'.$field}) {
     push @queries,&build_SQL_query($field,$ENV{'form.'.$field});      push @queries,&build_SQL_query($field,$ENV{'form.'.$field});
  }   }
     }      }
       # Evaluate option lists
     if ($ENV{'form.language'} and $ENV{'form.language'} ne 'any') {      if ($ENV{'form.language'} and $ENV{'form.language'} ne 'any') {
  push @queries,"(language like \"\%$ENV{'form.language'}\%\")";   push @queries,"(language like \"$ENV{'form.language'}\")";
     }      }
     if ($ENV{'form.mime'} and $ENV{'form.mime'} ne 'any') {      if ($ENV{'form.mime'} and $ENV{'form.mime'} ne 'any') {
  push @queries,"(mime like \"\%$ENV{'form.mime'}\%\")";   push @queries,"(mime like \"$ENV{'form.mime'}\")";
     }      }
     if ($ENV{'form.copyright'} and $ENV{'form.copyright'} ne 'any') {      if ($ENV{'form.copyright'} and $ENV{'form.copyright'} ne 'any') {
  push @queries,"(copyright like \"\%$ENV{'form.copyright'}\%\")";   push @queries,"(copyright like \"$ENV{'form.copyright'}\")";
     }      }
       # Evaluate date windows
     my $datequery=&build_date_queries(      my $datequery=&build_date_queries(
  $ENV{'form.creationdatestart_month'},   $ENV{'form.creationdatestart_month'},
  $ENV{'form.creationdatestart_day'},   $ENV{'form.creationdatestart_day'},
Line 548  sub advancedsearch { Line 750  sub advancedsearch {
  $ENV{'form.lastrevisiondateend_day'},   $ENV{'form.lastrevisiondateend_day'},
  $ENV{'form.lastrevisiondateend_year'},   $ENV{'form.lastrevisiondateend_year'},
  );   );
       # Test to see if date windows are legitimate
     if ($datequery=~/^Incorrect/) {      if ($datequery=~/^Incorrect/) {
  &output_date_error($r,$datequery);   &output_date_error($r,$datequery);
  return OK;   return OK;
Line 555  sub advancedsearch { Line 758  sub advancedsearch {
     elsif ($datequery) {      elsif ($datequery) {
  push @queries,$datequery;   push @queries,$datequery;
     }      }
       # Process form information for custom metadata querying
     my $customquery='';      my $customquery='';
     if ($ENV{'form.custommetadata'}) {      if ($ENV{'form.custommetadata'}) {
  $customquery=&build_custommetadata_query('custommetadata',   $customquery=&build_custommetadata_query('custommetadata',
       $ENV{'form.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) {      if (@queries) {
  $query=join(" AND ",@queries);   $query=join(" AND ",@queries);
  $query="select * from metadata where $query";   $query="select * from metadata where $query";
  my $reply='';   my $reply; # reply hash reference
  unless ($customquery) {   unless ($customquery or $customshow) {
     $reply=&Apache::lonnet::metadata_query($query);      $reply=&Apache::lonnet::metadata_query($query);
  }   }
  else {   else {
     $reply=&Apache::lonnet::metadata_query($query,$customquery);      $reply=&Apache::lonnet::metadata_query($query,
      $customquery,$customshow);
  }   }
  &output_results('Advanced',$r,$envhash,$customquery,$reply);   &output_results('Advanced',$r,$envhash,$customquery,$reply,$hidden);
     }      }
     else {      elsif ($customquery) {
  &output_results('Advanced',$r,$envhash,$query);   my $reply; # reply hash reference
    $reply=&Apache::lonnet::metadata_query('',
          $customquery,$customshow);
    &output_results('Advanced',$r,$envhash,$customquery,$reply,$hidden);
     }      }
     return OK;      # should not get to this point
       return 'Error.  Should not have gone to this point.';
 }  }
   
 # ---------------------------------------------------- see if a field is filled  ######################################################################
 sub filled {  ######################################################################
     my ($field)=@_;  
     if ($field=~/\S/) {  =pod 
  return 1;  
     }  
     else {  
  return 0;  
     }  
 }  
   
 # --------------------------------------------------- Performing a basic search  =item &basicsearch() 
   
   =cut
   
   ######################################################################
   ######################################################################
 sub basicsearch {  sub basicsearch {
     my ($r,$envhash)=@_;      my ($r,$envhash,$hidden)=@_;
     my %ENV=%{$envhash};      my %ENV=%{$envhash};
   
     # Clean up fields for safety      # Clean up fields for safety
     for my $field ('basicexp') {      for my $field ('basicexp') {
  $ENV{"form.$field"}=~s/[^\w\s\(\)\-]//g;   $ENV{"form.$field"}=~s/[^\w\s\(\)\-]//g;
     }      }
       foreach ('mode','form','element') {
    # is this required?  Hmmm.
    next unless (exists($ENV{"form.$_"}));
    $ENV{"form.$_"}=&Apache::lonnet::unescape($ENV{"form.$_"});
    $ENV{"form.$_"}=~s/[^\w\/\s\(\)\=\-\"\']//g;
       }
   
       # Check to see if enough is filled in
     unless (&filled($ENV{'form.basicexp'})) {      unless (&filled($ENV{'form.basicexp'})) {
  &output_blank_field_error($r);   &output_blank_field_error($r);
  return OK;   return OK;
     }      }
   
       # Build SQL query string based on form page
     my $query='';      my $query='';
     my $concatarg=join(',"    ",',      my $concatarg=join(',"    ",',
        ('title', 'author', 'subject', 'notes', 'abstract'));         ('title', 'author', 'subject', 'notes', 'abstract',
                           'keywords'));
       $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,$hidden);
   
     $query="select * from metadata where concat($concatarg) like '\%$ENV{'form.basicexp'}\%'";  
     my $reply=&Apache::lonnet::metadata_query($query);  
     &output_results('Basic',$r,$envhash,$query,$reply);  
     return OK;      return OK;
 }  }
   
 # ---------------- 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>  =pod 
 BEGINNING  
     $r->print(<<RESULTS);  =item &build_SQL_query() 
 </head>  
 <body bgcolor="#ffffff">  =cut
 <img align=right src=/adm/lonIcons/lonlogos.gif>  
 <h1>Search Catalog</h1>  ######################################################################
 <form method="post" action="/adm/searchcat">  ######################################################################
 $persistent  sub build_SQL_query {
 <input type='button' value='Revise search request'      my ($field_name,$logic_statement)=@_;
 onClick='this.form.submit();'>      my $q=new Text::Query('abc',
 $closebutton    -parse => 'Text::Query::ParseAdvanced',
 <hr>    -build => 'Text::Query::Build');
 <h3>Helpful Message</h3>      $q->prepare($logic_statement);
 <p>      my $matchexp=${$q}{'matchexp'}; chomp $matchexp;
 Incorrect search query due to blank entry fields.      my $sql_query=&recursive_SQL_query_build($field_name,$matchexp);
 You need to fill in the relevant      return $sql_query;
 fields on the search page in order for a query to be  
 processed.  
 </p>  
 </body>  
 </html>  
 RESULTS  
 }  }
   
 # ----------------------------- format and output results based on a reply list  ######################################################################
 sub output_results {  ######################################################################
     my ($mode,$r,$envhash,$query,@replylist)=@_;  
     my %ENV=%{$envhash};  
     my $compiledresult='';  
   
     foreach my $reply (@replylist) {  =pod 
   
  my @results;  =item &build_custommetadata_query() 
   
  my $replyfile='';  =cut
  $reply=~/^([\.\w]+)$/; # must do since 'use strict' checks for tainting  
  $replyfile=$r->dir_config('lonDaemons').'/tmp/'.$1;  
  $reply=~/(.*?)\_/;  
  my $hostname=$1;  
  sleep 3; # temporary fix, need to check for completion and status  
  {  
     while (1) {  
  last if -e $replyfile;  
  sleep 1;  
     }  
     # QUESTION: how should I handle this error condition..  
     # I'm sure there is syntax elsewhere I can use..  
     my $fh=Apache::File->new($replyfile) or  
  ($r->print('file cannot be opened') and return OK);  
     @results=<$fh>;  
  }  
   
  my $customshow='';  ######################################################################
  my $extrashow='';  ######################################################################
  if ($ENV{'form.customshow'}) {  sub build_custommetadata_query {
     $customshow=$ENV{'form.customshow'};      my ($field_name,$logic_statement)=@_;
     $customshow=~s/[^\w\s]//g;      &Apache::lonnet::logthis("Entered build_custommetadata_query:".
     my @fields=map {"<font color=\"#008000\">$_:</font>"}                                $field_name.':'.$logic_statement);
                    split(/\s+/,$customshow);      my $q=new Text::Query('abc',
     $extrashow="<ul><li>".join("</li><li>",@fields)."</li></ul>\n";    -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
       # wordone=wordtwo becomes\<wordone\>[^\<] *wordtwo[^\<]*\<\/wordone\>
       $matchexp =~ s/(\w+)\\=([\w\\\+]+)?# wordone=wordtwo is changed to 
                    /\\<$1\\>?#           \<wordone\>
                      \[\^\\<\]?#        [^\<]         
                      \*$2\[\^\\<\]?#           *wordtwo[^\<]
                      \*\\<\\\/$1\\>?#                        *\<\/wordone\>
                      /g;
       &Apache::lonnet::logthis("match expression: ".$matchexp);
       return $matchexp;
   }
   
   ######################################################################
   ######################################################################
   
   =pod 
   
   =item &recursive_SQL_query_build() 
   
   =cut
   
   ######################################################################
   ######################################################################
   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\%\")";
  }   }
  my $customdata='';   elsif ($key eq 'not') {
  foreach my $result (@results) {      $value=~s/like/not like/;
     $result=~/(\&custom.*)$/; # grab all custom metadata  #    $replacement="($dkey not like $value)";
     $customdata=$1;      $replacement="$value";
     $result=~s/\&custom.*$//; # remove custom metadata  
  }   }
  foreach my $result (@results) {   elsif ($key eq 'and') {
     my @fields=map      $value=~/(.*[\"|\)]) ([|\(|\^].*)/;
                    {&Apache::lonnet::unescape($_)}      $replacement="($1 AND $2)";
                    (split(/\,/,$result));   }
     my ($title,$author,$subject,$url,$keywords,$version,   elsif ($key eq 'or') {
  $notes,$abstract,$mime,$lang,      $value=~/(.*[\"|\)]) ([|\(|\^].*)/;
  $creationdate,$lastrevisiondate,$owner,$copyright)=@fields;      $replacement="($1 OR $2)";
     my $shortabstract=$abstract;   }
     $shortabstract=substr($abstract,0,200) if length($abstract)>200;   substr($pattern,
     $fields[7]=$shortabstract;         index($pattern,$match),
     $compiledresult.=<<END;         length($match),
 <p>         $replacement
 END         );
             $compiledresult.=<<END if $ENV{'form.catalogmode'} eq 'interactive';      }
 <font size='-1'><INPUT TYPE="button" NAME="returnvalues" VALUE="SELECT"      &recursive_SQL_query_build($dkey,$pattern);
 onClick="javascript:select_data('$title','$url')">  }
 </font>  
 <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') {  =pod 
  $compiledresult.=&detailed_citation_view(@fields,  
  $hostname,$httphost,  
  $extrashow);  
     }  
             elsif ($viewselect eq 'Summary View') {  
  $compiledresult.=&summary_view(@fields,$hostname,$httphost,  
        $extrashow);  
     }  
             elsif ($viewselect eq 'Fielded Format') {  
  $compiledresult.=&fielded_format_view(@fields,$hostname,  
       $httphost,$extrashow);  
     }  
             elsif ($viewselect eq 'XML/SGML') {  
  $compiledresult.=&xml_sgml_view(@fields,$hostname,$httphost,  
  $extrashow);  
     }  
   
         }  =item &build_date_queries() 
   
   =cut
   
  unless ($compiledresult) {  ######################################################################
     $compiledresult="There were no results that matched your query";  ######################################################################
   sub build_date_queries {
       my ($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 '';
   }
   
   ######################################################################
   ######################################################################
   
   =pod 
   
   =item &output_results() 
   
  # make query information persistent to allow for subsequent revision  Format and output results based on a reply list.
  my $persistent=&make_persistent();  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.)
   
   =cut
   
   ######################################################################
   ######################################################################
   sub output_results {
       my $fnum; # search result counter
       my ($mode,$r,$envhash,$query,$replyref,$hidden)=@_;
       my %ENV=%{$envhash};
       my %rhash=%{$replyref};
       my $compiledresult='';
       my $timeremain=300;
       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);   $r->print(<<BEGINNING);
 <html>  <html>
 <head>  <head>
 <title>The LearningOnline Network with CAPA</title>  <title>The LearningOnline Network with CAPA</title>
 BEGINNING  BEGINNING
         $r->print(<<SCRIPT) if $ENV{'form.catalogmode'} eq 'interactive';  
 <script>      # conditional output of script functions dependent on the mode in
       # which the search was invoked
       if ($ENV{'form.catalogmode'} eq 'interactive'){
    if (! exists($ENV{'form.mode'}) || $ENV{'form.mode'} ne 'edit') {
               $r->print(<<SCRIPT) 
   <script type="text/javascript">
     function select_data(title,url) {      function select_data(title,url) {
  changeTitle(title);   changeTitle(title);
  changeURL(url);   changeURL(url);
    self.close();
     }      }
     function changeTitle(val) {      function changeTitle(val) {
  if (opener.inf.document.forms.resinfo.elements.t) {   if (opener.inf.document.forms.resinfo.elements.t) {
Line 770  BEGINNING Line 1067  BEGINNING
     }      }
 </script>  </script>
 SCRIPT  SCRIPT
         $r->print(<<RESULTS);          } elsif ($ENV{'form.mode'} eq 'edit') {
               my $form = $ENV{'form.form'};
               my $element = $ENV{'form.element'};
               $r->print(<<SCRIPT) 
   <script type="text/javascript">
   function select_data(title,url) {
       changeURL(url);
       self.close();
   }
   function changeTitle(val) {
   }
   function changeURL(val) {
       if (window.opener.document) {
           window.opener.document.forms["$form"].elements["$element"].value=val;
       } else {
    var url = 'forms[\"$form\"].elements[\"$element\"].value';
           alert("Unable to transfer data to "+url);
       }
   }
   </script>
   SCRIPT
           }
       }
       $r->print(<<SCRIPT) if $ENV{'form.catalogmode'} eq 'groupsearch';
   <script type="text/javascript">
       function select_data(title,url) {
   // alert('DEBUG: Should be storing '+title+' and '+url);
       }
       function queue(val) {
    if (eval("document.forms.results.returnvalues["+val+"].checked")) {
       document.forms.results.acts.value+='1a'+val+'b';
    }
    else {
       document.forms.results.acts.value+='0a'+val+'b';
    }
       }
       function select_group() {
    window.location=
       "/adm/groupsort?mode=$ENV{'form.mode'}&catalogmode=groupsearch&acts="+
       document.forms.results.acts.value;
       }
   </script>
   SCRIPT
       $r->print(<<SCRIPT);
   <script type="text/javascript">
       function displayinfo(val) {
    popwin.document.forms.popremain.sdetails.value=val;
       }
       function openhelp(val) {
    openhelpwin=open('/adm/help/searchcat.html','helpscreen',
        'scrollbars=1,width=400,height=300');
    openhelpwin.focus();
       }
       function abortsearch(val) {
    popwin.close();
       }
   </script>
   SCRIPT
       $r->rflush();
   
       # begin showing the cataloged results
       $r->print(<<CATALOGBEGIN);
 </head>  </head>
 <body bgcolor="#ffffff">  <body bgcolor="#ffffff">
 <img align=right src=/adm/lonIcons/lonlogos.gif>  <img align=right src=/adm/lonIcons/lonlogos.gif>
 <h1>Search Catalog</h1>  <h1>Search Catalog</h1>
 <form method="post" action="/adm/searchcat">  CATALOGBEGIN
 $customdata          $r->print(<<CATALOGCONTROLS);
   <form name='results' method="post" action="/adm/searchcat">
   $hidden
   <input type='hidden' name='acts' value='' />
 <input type='button' value='Revise search request'  <input type='button' value='Revise search request'
 onClick='this.form.submit();'>  onClick='this.form.submit();' />
   $importbutton
 $closebutton  $closebutton
 $persistent  $persistent
 <hr>  <hr />
 <h3>Search Query</h3>  <h3>Search Query</h3>
 RESULTS  CATALOGCONTROLS
     if ($mode eq 'Basic') {      if ($mode eq 'Basic') {
  $r->print(<<RESULTS);   $r->print(<<RESULTS);
 <p>  <p>
Line 799  $query Line 1161  $query
 </p>  </p>
 RESULTS  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;
    my $hc;
    if ($rhash{$sk} eq 'con_lost') {
       $hc="BAD CONNECTION, CONTACT SYSTEM ADMINISTRATOR ";
    }
    else {
       $hc="'+\"'\"+\"+hc['$sk']+\"+\"'\"+'";
       $hcinit.="hc[\"$sk\"]=\"not yet connected...\";";
    }
    $grid.=" hitcount=".$hc;
    $grid.=" domain=".$hostdomains{$sk};
    $grid.=" IP=".$hostips{$sk};
    # '+"'"+'">'+
    $grid.="'+\"'\"+')\">'+";
    $grid.="\n";
    $grid.="'<img border=\"0\" name=\"img".$sn."\"".
       " src=\"/adm/lonIcons/srvnull.gif\" alt=\"".$sk."\" /></a>'+\n";
    $grid.="'<br />'+\n" unless $sn%10;
           $sn++;
       }
       $r->print(<<ENDPOP);
   <script type="text/javascript">
       popwin=open('','popwin','scrollbars=1,width=400,height=220');
       popwin.focus();
       popwin.document.writeln('<'+'html>');
       popwin.document.writeln('<'+'head>');
       popwin.document.writeln('<'+'script>');
       popwin.document.writeln('hc=new Array();$hcinit');
       popwin.document.writeln('<'+'/script>');
       popwin.document.writeln('<'+'/head>'+
           '<'+'body bgcolor="#FFFFFF">'+
    '<'+'image name="whirly" align="right" src="/adm/lonIcons/'+
    'lonanim.gif" '+
    'alt="animated logo" />'+
    '<'+'h3>Search Results Progress<'+'/h3>'+
           '<'+'form name="popremain">'+
           '<'+'tt>'+
    '<'+'br clear="all"/><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="35" name="sdetails"'+
    ' value="" />'+
    '<'+'br />'+
    ' <'+'input type="button" name="button"'+
    ' value="close this window" '+
    ' onClick="javascript:opener.abortsearch()" />'+
    ' <'+'input type="button" name="button"'+
    ' value="help" onClick="javascript:opener.openhelp()" />'+
    '<'+'/tt>'+
           '<'+'/form>'+
           '<'+'/body><'+'/html>');
       popwin.document.close();
   </script>
   ENDPOP
       $r->rflush();
   
       my $servercount=0;
       my $hitcountsum=0;
       my $bloop=$servernum;
       my %orkey;
     BLOOP: while(1) {
         my $sn=0;
         last BLOOP unless $bloop;
         last BLOOP unless $timeremain;
       RLOOP: foreach my $rkey (sort keys %rhash) {
    $sn++;
    next RLOOP if $orkey{$rkey};
    $servercount++;
    $tflag=1;
    $compiledresult='';
    my $hostname=$rkey;
    my $reply=$rhash{$rkey};
    my @results;
   
    my $replyfile='';
   
    if ($reply eq 'con_lost') {
       &popwin_imgupdate($r,$sn,"srvbad.gif");
       $bloop--;
       $orkey{$rkey}=1;
    }
    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 && $tflag) {
         &popwin_imgupdate($r,$sn,"srvhalf.gif");
         &popwin_js($r,'popwin.hc["'.$rkey.'"]='.
    '"still transferring..."'.';');
         $tflag=0;
     }
     if (-e "$replyfile.end") {
         $bloop--;
         $orkey{$rkey}=1;
         if (-s $replyfile) {
     &popwin_imgupdate($r,$sn,"srvgood.gif");
     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;
     &popwin_js($r,'popwin.hc["'.$rkey.'"]='.
       $hitcount{$rkey}.';');
     $hitcountsum+=$hitcount{$rkey};
     &popwin_js($r,'popwin.document.forms.popremain.'.
       'numhits.value='.$hitcountsum.';');
         }
         else {
     &popwin_imgupdate($r,$sn,"srvempty.gif");
     &popwin_js($r,'popwin.hc["'.$rkey.'"]=0;');
         }
         last WLOOP;
     }
     if ($temp>1) {
         sleep 1;
         $timeremain--;
         $elapsetime++;
         last WLOOP;
     }
     last WLOOP unless $timeremain;
     sleep 1;
     $timeremain--;
     $elapsetime++;
     &popwin_js($r,"popwin.document.popremain.".
          "elapsetime.value=$elapsetime;");
     $temp++;
         }
       }
       &popwin_js($r,'popwin.document.whirly.'.
          'src="/adm/lonIcons/lonanimend.gif";');
    }
    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}=$v;
       }
    }
    if (keys %hash) {
       untie %hash;
    }
    if (tie(%hash,'GDBM_File',$diropendb,&GDBM_WRCREAT,0640)) {
       if ($ENV{'form.launch'} eq '1') {
    &start_fresh_session();
       }
       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;
                   unless ($title =~ /^\s*$/ ) { $title='<i>Untitled</i>'; }
    unless ($ENV{'user.adv'}) {
       $keywords='<i>- not displayed -</i>';
       $fields[4]=$keywords;
       $notes='<i>- not displayed -</i>';
       $fields[6]=$notes;
       $abstract='<i>- not displayed -</i>';
       $fields[7]=$abstract;
       $subject='<i>- not displayed -</i>';
       $fields[2]=$subject;
    }
   
    my $shortabstract=$abstract;
    $shortabstract=substr($abstract,0,200).'...' if length($abstract)>200;
    $fields[7]=$shortabstract;
    my $shortkeywords=$keywords;
    $shortkeywords=substr($keywords,0,200).'...' if length($keywords)>200;
    $fields[4]=$shortkeywords;
   
    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
                   $compiledresult.=<<END;
   <p>
   END
                  if ($ENV{'form.catalogmode'} eq 'interactive') {
      my $titleesc=$title;
      $titleesc=~s/\'/\\'/; # '
   
                      $compiledresult.=<<END if ($ENV{'form.catalogmode'} eq 'interactive');
   <font size='-1'><INPUT TYPE="button" NAME="returnvalues" VALUE="SELECT"
   onClick="javascript:select_data('$titleesc','$url')">
   </font>
   <br />
   END
                   }
                   if ($ENV{'form.catalogmode'} eq 'groupsearch') {
       $fnum+=0;
       $hash{"pre_${fnum}_link"}=$url;
       $hash{"pre_${fnum}_title"}=$title;
       $compiledresult.=<<END;
   <font size='-1'>
   <input type="checkbox" name="returnvalues" value="SELECT"
   onClick="javascript:queue($fnum)" />
   </font>
   <br />
   END
   # <input type="hidden" name="title$fnum" value="$title" />
   # <input type="hidden" name="url$fnum" value="$url" />
                       $fnum++;
    }
           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);
    }
       
               }
   
               untie %hash;
           }
           else {
       $r->print('<html><head></head><body>Unable to tie hash to db '.
     'file</body></html>');
    }
    if ($compiledresult) {
       $resultflag=1;
    }
   
  $r->print(<<RESULTS);   $r->print(<<RESULTS);
 <h3>Search Results</h3>  
 $compiledresult  $compiledresult
   RESULTS
           my $percent=sprintf('%3.0f',($servercount/$servernum*100));
       }
     }
       unless ($resultflag) {
           $r->print("\nThere were no results that matched your query\n");
       }
   #    $r->print('<script type="text/javascript">'.'popwin.close()</script>'."\n"); $r->rflush(); 
       $r->print(<<RESULTS);
 </body>  </body>
 </html>  </html>
 RESULTS  RESULTS
     }  
 }  }
   
 # ------------------------------------------------------------- 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  =pod 
 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  =item Metadata Viewing Functions
 sub recursive_SQL_query_build {  
     my ($dkey,$pattern)=@_;  Output is a HTML-ified string.
     my @matches=($pattern=~/(\[[^\]|\[]*\])/g);  Input arguments are title, author, subject, url, keywords, version,
     return $pattern unless @matches;  notes, short abstract, mime, language, creation date,
     foreach my $match (@matches) {  last revision date, owner, copyright, hostname, httphost, and
  $match=~/\[ (\w+)\s(.*) \]/;  extra custom metadata to show.
  my ($key,$value)=($1,$2);  
  my $replacement='';  =over 4
  if ($key eq 'literal') {  
     $replacement="($dkey like \"\%$value\%\")";  =item &detailed_citation_view() 
  }  
  elsif ($key eq 'and') {  =cut
     $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);  
 }  
   
 # ------------------------------------------------------ Detailed Citation View  ######################################################################
   ######################################################################
 sub detailed_citation_view {  sub detailed_citation_view {
     my ($title,$author,$subject,$url,$keywords,$version,      my ($title,$author,$subject,$url,$keywords,$version,
  $notes,$shortabstract,$mime,$lang,   $notes,$shortabstract,$mime,$lang,
Line 876  sub detailed_citation_view { Line 1513  sub detailed_citation_view {
 <h3>$author</h3>  <h3>$author</h3>
 </p>  </p>
 <p>  <p>
 <b>Subject:</b> $subject<br>  <b>Subject:</b> $subject<br />
 <b>Keyword(s):</b> $keywords<br>  <b>Keyword(s):</b> $keywords<br />
 <b>Notes:</b> $notes<br>  <b>Notes:</b> $notes<br />
 <b>MIME Type:</b> $mimetag{$mime}<br>  <b>MIME Type:</b>
 <b>Language:</b> $language{$lang}<br>  END
 <b>Copyright/Distribution:</b> $cprtag{$copyright}<br>      $result.=&Apache::loncommon::filedescription($mime);
       $result.=<<END;
   <br />
   <b>Language:</b> 
   END
       $result.=&Apache::loncommon::languagedescription($lang);
       $result.=<<END;
   <br />
   <b>Copyright/Distribution:</b> 
   END
       $result.=&Apache::loncommon::copyrightdescription($copyright);
       $result.=<<END;
   <br />
 </p>  </p>
 $extrashow  $extrashow
 <p>  <p>
Line 891  END Line 1540  END
     return $result;      return $result;
 }  }
   
 # ---------------------------------------------------------------- Summary View  ######################################################################
   ######################################################################
   
   =pod 
   
   =item &summary_view() 
   
   =cut
   
   ######################################################################
   ######################################################################
 sub summary_view {  sub summary_view {
     my ($title,$author,$subject,$url,$keywords,$version,      my ($title,$author,$subject,$url,$keywords,$version,
  $notes,$shortabstract,$mime,$lang,   $notes,$shortabstract,$mime,$lang,
  $creationdate,$lastrevisiondate,$owner,$copyright,   $creationdate,$lastrevisiondate,$owner,$copyright,
  $hostname,$httphost,$extrashow)=@_;   $hostname,$httphost,$extrashow)=@_;
       my $cprtag=&Apache::loncommon::copyrightdescription($copyright);
     my $result=<<END;      my $result=<<END;
 <a href="http://$httphost$url" TARGET='search_preview'>$author</a><br />  <a href="http://$httphost$url" TARGET='search_preview'>$author</a><br />
 $title<br />  $title<br />
 $owner -- $lastrevisiondate<br />  $owner -- $lastrevisiondate<br />
 $cprtag{$copyright}<br />  $cprtag<br />
 $extrashow  $extrashow
 </p>  </p>
 END  END
     return $result;      return $result;
 }  }
   
 # -------------------------------------------------------------- Fielded Format  ######################################################################
   ######################################################################
   
   =pod 
   
   =item &fielded_format_view() 
   
   =cut
   
   ######################################################################
   ######################################################################
 sub fielded_format_view {  sub fielded_format_view {
     my ($title,$author,$subject,$url,$keywords,$version,      my ($title,$author,$subject,$url,$keywords,$version,
  $notes,$shortabstract,$mime,$lang,   $notes,$shortabstract,$mime,$lang,
  $creationdate,$lastrevisiondate,$owner,$copyright,   $creationdate,$lastrevisiondate,$owner,$copyright,
  $hostname,$httphost,$extrashow)=@_;   $hostname,$httphost,$extrashow)=@_;
       my $mimetag=&Apache::loncommon::filedescription($mime);
       my $language=&Apache::loncommon::languagedescription($lang);
       my $cprtag=&Apache::loncommon::copyrightdescription($copyright);
     my $result=<<END;      my $result=<<END;
 <b>URL: </b> <A HREF="http://$httphost$url" TARGET='search_preview'>$url</A>  <b>URL: </b> <A HREF="http://$httphost$url" TARGET='search_preview'>$url</A>
 <br />  <br />
Line 922  sub fielded_format_view { Line 1595  sub fielded_format_view {
 <b>Subject:</b> $subject<br />  <b>Subject:</b> $subject<br />
 <b>Keyword(s):</b> $keywords<br />  <b>Keyword(s):</b> $keywords<br />
 <b>Notes:</b> $notes<br />  <b>Notes:</b> $notes<br />
 <b>MIME Type:</b> $mimetag{$mime}<br />  <b>MIME Type:</b> $mimetag<br />
 <b>Language:</b> $language{$lang}<br />  <b>Language:</b> $language<br />
 <b>Creation Date:</b> $creationdate<br />  <b>Creation Date:</b> $creationdate<br />
 <b>Last Revision Date:</b> $lastrevisiondate<br />  <b>Last Revision Date:</b> $lastrevisiondate<br />
 <b>Publisher/Owner:</b> $owner<br />  <b>Publisher/Owner:</b> $owner<br />
 <b>Copyright/Distribution:</b> $cprtag{$copyright}<br />  <b>Copyright/Distribution:</b> $cprtag<br />
 <b>Repository Location:</b> $hostname<br />  <b>Repository Location:</b> $hostname<br />
 <b>Abstract:</b> $shortabstract<br />  <b>Abstract:</b> $shortabstract<br />
 $extrashow  $extrashow
Line 936  END Line 1609  END
     return $result;      return $result;
 }  }
   
 # -------------------------------------------------------------------- XML/SGML  ######################################################################
   ######################################################################
   
   =pod 
   
   =item &xml_sgml_view() 
   
   =back 
   
   =cut
   
   ######################################################################
   ######################################################################
 sub xml_sgml_view {  sub xml_sgml_view {
     my ($title,$author,$subject,$url,$keywords,$version,      my ($title,$author,$subject,$url,$keywords,$version,
  $notes,$shortabstract,$mime,$lang,   $notes,$shortabstract,$mime,$lang,
  $creationdate,$lastrevisiondate,$owner,$copyright,   $creationdate,$lastrevisiondate,$owner,$copyright,
  $hostname,$httphost,$extrashow)=@_;   $hostname,$httphost,$extrashow)=@_;
       my $cprtag=&Apache::loncommon::copyrightdescription($copyright);
       my $mimetag=&Apache::loncommon::filedescription($mime);
       my $language=&Apache::loncommon::languagedescription($lang);
     my $result=<<END;      my $result=<<END;
 <pre>  <pre>
 &lt;LonCapaResource&gt;  &lt;LonCapaResource&gt;
Line 953  sub xml_sgml_view { Line 1641  sub xml_sgml_view {
 &lt;notes&gt;$notes&lt;/notes&gt;  &lt;notes&gt;$notes&lt;/notes&gt;
 &lt;mimeInfo&gt;  &lt;mimeInfo&gt;
 &lt;mime&gt;$mime&lt;/mime&gt;  &lt;mime&gt;$mime&lt;/mime&gt;
 &lt;mimetag&gt;$mimetag{$mime}&lt;/mimetag&gt;  &lt;mimetag&gt;$mimetag&lt;/mimetag&gt;
 &lt;/mimeInfo&gt;  &lt;/mimeInfo&gt;
 &lt;languageInfo&gt;  &lt;languageInfo&gt;
 &lt;language&gt;$lang&lt;/language&gt;  &lt;language&gt;$lang&lt;/language&gt;
 &lt;languagetag&gt;$language{$lang}&lt;/languagetag&gt;  &lt;languagetag&gt;$language&lt;/languagetag&gt;
 &lt;/languageInfo&gt;  &lt;/languageInfo&gt;
 &lt;creationdate&gt;$creationdate&lt;/creationdate&gt;  &lt;creationdate&gt;$creationdate&lt;/creationdate&gt;
 &lt;lastrevisiondate&gt;$lastrevisiondate&lt;/lastrevisiondate&gt;  &lt;lastrevisiondate&gt;$lastrevisiondate&lt;/lastrevisiondate&gt;
 &lt;owner&gt;$owner&lt;/owner&gt;  &lt;owner&gt;$owner&lt;/owner&gt;
 &lt;copyrightInfo&gt;  &lt;copyrightInfo&gt;
 &lt;copyright&gt;$copyright&lt;/copyright&gt;  &lt;copyright&gt;$copyright&lt;/copyright&gt;
 &lt;copyrighttag&gt;$cprtag{$copyright}&lt;/copyrighttag&gt;  &lt;copyrighttag&gt;$cprtag&lt;/copyrighttag&gt;
 &lt;/copyrightInfo&gt;  &lt;/copyrightInfo&gt;
 &lt;repositoryLocation&gt;$hostname&lt;/repositoryLocation&gt;  &lt;repositoryLocation&gt;$hostname&lt;/repositoryLocation&gt;
 &lt;shortabstract&gt;$shortabstract&lt;/shortabstract&gt;  &lt;shortabstract&gt;$shortabstract&lt;/shortabstract&gt;
Line 975  END Line 1663  END
     return $result;      return $result;
 }  }
   
 sub build_date_queries {  ######################################################################
     my ($cmonth1,$cday1,$cyear1,$cmonth2,$cday2,$cyear2,  ######################################################################
  $lmonth1,$lday1,$lyear1,$lmonth2,$lday2,$lyear2)=@_;  
     my @queries;  =pod 
     if ($cmonth1 or $cday1 or $cyear1 or $cmonth2 or $cday2 or $cyear2) {  
  unless ($cmonth1 and $cday1 and $cyear1 and  =item &filled() see if field is filled.
  $cmonth2 and $cday2 and $cyear2) {  
     return "Incorrect entry for the creation date.  You must specify ".  =cut
    "a starting month, day, and year and an ending month, ".  
    "day, and year.";  ######################################################################
  }  ######################################################################
  my $cnumeric1=sprintf("%d%2d%2d",$cyear1,$cmonth1,$cday1);  sub filled {
  $cnumeric1+=0;      my ($field)=@_;
  my $cnumeric2=sprintf("%d%2d%2d",$cyear2,$cmonth2,$cday2);      if ($field=~/\S/ && $field ne 'any') {
  $cnumeric2+=0;   return 1;
  if ($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) {      else {
  return join(" AND ",@queries);   return 0;
     }      }
     return '';  
 }  }
   
 sub output_date_error {  ######################################################################
     my ($r,$message)=@_;  ######################################################################
   
   =pod 
   
   =item &output_blank_field_error()
   
   =cut
   
   ######################################################################
   ######################################################################
   sub output_blank_field_error {
       my ($r)=@_;
     # make query information persistent to allow for subsequent revision      # make query information persistent to allow for subsequent revision
     my $persistent=&make_persistent();      my $persistent=&make_persistent();
   
Line 1036  BEGINNING Line 1708  BEGINNING
     $r->print(<<RESULTS);      $r->print(<<RESULTS);
 </head>  </head>
 <body bgcolor="#ffffff">  <body bgcolor="#ffffff">
 <img align=right src=/adm/lonIcons/lonlogos.gif>  <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">
 $persistent  $persistent
 <input type='button' value='Revise search request'  <input type='button' value='Revise search request'
 onClick='this.form.submit();'>  onClick='this.form.submit();' />
 $closebutton  $closebutton
 <hr>  <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
   }
   
   ######################################################################
   ######################################################################
   
   =pod 
   
   =item &output_date_error()
   
   Output a full html page with an error message.
   
   =cut
   
   ######################################################################
   ######################################################################
   sub output_date_error {
       my ($r,$message)=@_;
       # make query information persistent to allow for subsequent revision
       my $persistent=&make_persistent();
   
       $r->print(<<RESULTS);
   <html>
   <head>
   <title>The LearningOnline Network with CAPA</title>
   </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>  <h3>Helpful Message</h3>
 <p>  <p>
 $message  $message
Line 1053  $message Line 1769  $message
 RESULTS  RESULTS
 }  }
   
 sub make_persistent {  ######################################################################
     my $persistent='';  ######################################################################
       
     map {  =pod 
  if (/^form\./ && !/submit/) {  
     my $name=$_;  =item &start_fresh_session()
     my $key=$name;  
     $ENV{$key}=~s/\'//g; # do not mess with html field syntax  Cleans the global %hash by removing all fields which begin with
     $name=~s/^form\.//;  'pre_' or 'store'.
     $persistent.=<<END;  
 <input type='hidden' name='$name' value='$ENV{$key}' />  =cut
 END  
   ######################################################################
   ######################################################################
   sub start_fresh_session {
       delete $hash{'mode_catalog'};
       foreach (keys %hash) {
           if ($_ =~ /^pre_/) {
               delete $hash{$_};
         }          }
     } (keys %ENV);          if ($_ =~ /^store/) {
     return $persistent;      delete $hash{$_};
    }
       }
   }
   
   ######################################################################
   ######################################################################
   
   =pod 
   
   =item &popwin_js() send javascript to popwin
   
   =cut
   
   ######################################################################
   ######################################################################
   sub popwin_js {
       # Print javascript out to popwin, but make sure we dont generate
       # any javascript errors in doing so.
       my ($r,$text) = @_;
       $r->print(<<"END");
   <script type="text/javascript">
       if (! popwin.closed) {
    $text
       }
   </script>
   END
       $r->rflush();
 }  }
   
   ######################################################################
   ######################################################################
   
   =pod 
   
   =item &popwin_imgupdate()
   
   =cut
   
   ######################################################################
   ######################################################################
   sub popwin_imgupdate {
       my ($r,$imgnum,$icon) = @_;
       &popwin_js($r,'popwin.document.img'.$imgnum.'.'.
          'src="/adm/lonIcons/'.$icon.'";');
   }    
   
 1;  1;
   
 __END__  __END__
   
   =pod
   
   =back 
   
   =over 4
   
   =head1 HANDLER SUBROUTINE
   
   This routine is called by Apache and mod_perl.
   
   =over 4
   
   =item *
   
   configure dynamic components of interface
   
   =item *
   
   determine current user
   
   =item *
   
   see if a search invocation should be done
   
   =item *
   
   else, begin building search interface to output
   
   =item *
   
   compute date selection boxes
   
   =item *
   
   compute customized metadata field
   
   =item *
   
   print screen
   
   =back
   
   =head1 OTHER SUBROUTINES
   
   =over 4
   
   =item *
   
   get_unprocessed_cgi() : reads in critical name/value pairs that may have not
   been processed and passed into %ENV by the web server
   
   =item *
   
   make_persistent() : makes a set of hidden HTML fields to make
   SQL search interface information to be persistent
   
   =back
   
   WEB INTERFACE COMPONENT FUNCTIONS
   
   =over 4
   
   =item *
   
   simpletextfield(name,value) : returns HTML formatted string for simple text
   field
   
   =item *
   
   simplecheckbox(name,value) : returns HTML formatted string for simple
   checkbox
   
   =item *
   
   searchphrasefield(title,name,value) : returns HTML formatted string for
   a search expression phrase field
   
   =item *
   
   dateboxes(name, defaultmonth, defaultday, defaultyear) : returns HTML
   formatted string for a calendar date
   
   =item *
   
   selectbox(title,name,value,%HASH=options) : returns HTML formatted string for
   a selection box field
   
   =back
   
   SEARCH FUNCTIONS
   
   =over 4
   
   =item *
   
   advancedsearch(server reference, environment reference) : perform a complex
   multi-field logical query
   
   =item *
   
   basicsearch(server reference, environment reference) : perform a simple
   single-field logical query
   
   =item *
   
   build_SQL_query(field name, logic) : builds a SQL query string from a
   logical expression with AND/OR keywords
   
   =item *
   
   build_custommetadata_query(field_name, logic_statement) : builds a perl
   regular expression from a logical expression with AND/OR keywords
   
   =item *
   
   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
   
   =item *
   
   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.
   
   =back
   
   OUTPUTTING RESULTS FUNCTION
   
   =over 4
   
   =item *
   
   output_results(output mode, server reference, environment reference,
   reply list reference) : outputs results from search
   
   =back
   
   DIFFERENT WAYS TO VIEW METADATA RECORDS
   
   =over 4
   
   =item *
   
   detailed_citation_view(ORDERED METADATA LIST FOR A RESULT OBJECT INSTANCE) :
   see metadata viewing notes below 
   
   =item *
   
   summary_view(ORDERED METADATA LIST FOR A RESULT OBJECT INSTANCE) :
   see metadata viewing notes below 
   
   =item *
   
   fielded_format_view(ORDERED METADATA LIST FOR A RESULT OBJECT INSTANCE) :
   see metadata viewing notes below 
   
   =item *
   
   xml_sgml_view(ORDERED METADATA LIST FOR A RESULT OBJECT INSTANCE) :
   see metadata viewing notes below 
   
   =back
   
     _____________________________________________________________________
    | * 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
   
   =over 4
   
   =item *
   
   filled(field) : determines whether a given field has been filled
   
   =back
   
   ERROR FUNCTIONS
   
   =over 4
   
   =item *
   
   output_blank_field_error(server reference) : outputs a message saying that
   more fields need to be filled in
   
   =item *
   
   output_date_error(server reference, error message) : 
   
   
   =back
   
   =cut
Removed from v.1.80  
changed lines
  Added in v.1.124

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