--- loncom/interface/lonsearchcat.pm	2001/03/20 17:49:03	1.44
+++ loncom/interface/lonsearchcat.pm	2002/07/30 20:26:05	1.149
@@ -1,164 +1,530 @@
-# The LearningOnline Network
+# The LearningOnline Network with CAPA
 # Search Catalog
 #
-# 03/08/2001 Scott Harrison
-# Scott Harrison: 03/12/2001, 03/13/2001, 03/14/2001, 03/15/2001, 03/19/2001
-# Scott Harrison: 03/20/2001
+# $Id: lonsearchcat.pm,v 1.149 2002/07/30 20:26:05 matthew Exp $
 #
-# Functions
+# Copyright Michigan State University Board of Trustees
 #
-# handler(server reference) : interacts with the Apache server layer
-#                             (for /adm/searchcat URLs)
-# simpletextfield(name,value) : returns HTML formatted string for simple text
-#                               field
-# simplecheckbox(name,value) : returns HTML formatted string for simple
-#                              checkbox
-# searchphrasefield(title,name,value) : returns HTML formatted string for
-#                                       a search expression phrase field
-# dateboxes(name, defaultmonth, defaultday, defaultyear) : returns HTML
-#                                                          formatted string
-#                                                          for a calendar date
-# selectbox(title,name,value,%HASH=options) : returns HTML formatted string for
-#                                             a selection box field
-# advancedsearch(server reference, environment reference) : perform a complex
-#                                  multi-field logical query
-# filled(field) : determines whether a given field has been filled
-# basicsearch(server reference, environment reference) : perform a simple
-#                               single-field logical query
-# output_blank_field_error(server reference) : outputs a message saying that
-#                                              more fields need to be filled in
-# output_results(output mode,
-#                server reference, 
-#                environment reference,
-#                reply list reference) : outputs results from search
-# build_SQL_query(field name, logic) : builds a SQL query string from a
-#                                      logical expression with AND/OR keywords
-# recursive_SQL_query_build(field name, reverse notation expression) : 
-#                 builds a SQL query string from a reverse notation expression
-#                 logical expression with AND/OR keywords
+# This file is part of the LearningOnline Network with CAPA (LON-CAPA).
+#
+# LON-CAPA is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+#
+# LON-CAPA is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with LON-CAPA; if not, write to the Free Software
+# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+#
+# /home/httpd/html/adm/gpl.txt
+#
+# http://www.lon-capa.org/
+#
+# YEAR=2001
+# 3/8, 3/12, 3/13, 3/14, 3/15, 3/19 Scott Harrison
+# 3/20, 3/21, 3/22, 3/26, 3/27, 4/2, 8/15, 8/24, 8/25 Scott Harrison
+# 10/12,10/14,10/15,10/16,11/28,11/29,12/10,12/12,12/16 Scott Harrison
+# YEAR=2002
+# 1/17 Scott Harrison
+# 6/17 Matthew Hall
+#
+###############################################################################
+###############################################################################
+
+=pod 
+
+=head1 NAME
+
+lonsearchcat - LONCAPA Search Interface
+
+=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. Variables used throughout the module                                   ##
+## 3. handler subroutine called via Apache and mod_perl                      ##
+## 4. Other subroutines                                                      ##
+##                                                                           ##
+###############################################################################
 
 package Apache::lonsearchcat;
 
+# ------------------------------------------------- modules used by this module
 use strict;
 use Apache::Constants qw(:common);
 use Apache::lonnet();
 use Apache::File();
 use CGI qw(:standard);
 use Text::Query;
+use DBI;
+use GDBM_File;
+use Apache::loncommon();
+use Apache::lonmysql();
 
-my %language;
-my $scrout;
-my %metadatafields;
-my %cprtag;
-my %mimetag;
+# ---------------------------------------- variables used throughout the module
 
-sub handler {
-    my $r = shift;
+######################################################################
+######################################################################
 
-# -------------------------------------- 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'}));
+=pod 
 
-    $r->content_type('text/html');
-    $r->send_http_header;
-    return OK if $r->header_only;
+=item Global variables
 
-    %metadatafields=();
+=over 4
 
-    my $hidden='';
-    $hidden=<<END if $ENV{'form.catalogmode'} eq 'interactive';
-<input type='hidden' name='catalogmode' value='interactive'>
-END
+=item $importbutton
 
-# ------------------------------------------------ First, check out environment
-    $metadatafields{'owner'}=$ENV{'user.name'}.'@'.$ENV{'user.domain'};
+button to take the select results and go to group sorting
 
-# --------------------------------- 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\-]+)/;
-	    $language{$1}=$2;
-	} <$fh>;
-    }
+=item %groupsearch_db   
 
-    %cprtag=();
-    $cprtag{'any'}='Any copyright/distribution';
-    {
-	my $fh=Apache::File->new($r->dir_config('lonIncludes').'/copyright.tab');
-	map {
-	    $_=~/(\w+)\s+([\w\s\-]+)/;
-	    $cprtag{$1}=$2;
-	} <$fh>;
-    }
+Database hash used to save values for the groupsearch RAT interface.
 
-    %mimetag=();
-    $mimetag{'any'}='Any type';
-    {
-	my $fh=Apache::File->new($r->dir_config('lonTabDir').'/filetypes.tab');
-	map {
-	    $_=~/(\w+)\s+(\w+)\s+([\w\s\-]+)/;
-	    $mimetag{$1}=".$1 $3";
-	} <$fh>;
-    }
+=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().
+
+=item %Views
+
+Hash which associates an output view description with the function
+that produces it.  Adding a new view type should be as easy as
+adding a line to the definition of this hash and making sure the function
+takes the proper parameters.
+
+=back 
+
+=cut
+
+######################################################################
+######################################################################
+
+# -- dynamically rendered interface components
+my $importbutton; # button to take the selected results and go to group sorting
+
+# -- miscellaneous variables
+my %groupsearch_db;     # database hash
+my $diropendb = "";    # db file
+#             View Description           Function Pointer
+my %Views = ("Detailed Citation View" => \&detailed_citation_view,
+             "Summary View"           => \&summary_view,
+             "Fielded Format"         => \&fielded_format_view,
+             "XML/SGML"               => \&xml_sgml_view );
+my %persistent_db;
+my $hidden_fields;
+######################################################################
+######################################################################
+
+=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
 
-    if ($ENV{'form.basicsubmit'} eq 'SEARCH') {
-	return &basicsearch($r,\%ENV);
+=back 
+
+=cut
+
+######################################################################
+######################################################################
+sub handler {
+    my $r = shift;
+    #
+    my $closebutton;  # button that closes the search window 
+                      # This button is different for the RAT compared to
+                      # normal invocation.
+    #
+    $r->content_type('text/html');
+    $r->send_http_header;
+    return OK if $r->header_only;
+    ## 
+    ## Pick up form fields passed in the links.
+    ##
+    &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
+             ['catalogmode','launch','acts','mode','form','element','pause',
+              'phase','persistent_db_id','table','start','show']);
+    ##
+    ## The following is a trick - we wait a few seconds if asked to so
+    ##     the daemon running the search can get ahead of the daemon
+    ##     printing the results.  We only need (theoretically) to do
+    ##     this once, so the pause indicator is deleted
+    ##
+    if (exists($ENV{'form.pause'})) {
+        sleep(3);
+        delete($ENV{'form.pause'});
+    }
+    ##
+    ## Initialize global variables
+    ##
+    my $domain  = $r->dir_config('lonDefDomain');
+    $diropendb= "/home/httpd/perl/tmp/".&Apache::lonnet::escape($domain).
+            "\_".&Apache::lonnet::escape($ENV{'user.name'})."_searchcat.db";
+    #
+    # set the name of the persistent database
+    #          $ENV{'form.persistent_db_id'} can only have digits in it.
+    if (! exists($ENV{'form.persistent_db_id'}) ||
+        ($ENV{'form.persistent_db_id'} =~ /\D/) ||
+        ($ENV{'form.launch'} eq '1')) {
+        $ENV{'form.persistent_db_id'} = time;
+    }
+    my $persistent_db_file = "/home/httpd/perl/tmp/".
+        &Apache::lonnet::escape($domain).
+            '_'.&Apache::lonnet::escape($ENV{'user.name'}).
+                '_'.$ENV{'form.persistent_db_id'}.'_persistent_search.db';
+    ##
+    if (! &get_persistent_form_data($r,$persistent_db_file)) {
+        &write_status($r,"Unable to get persistent data");
     }
-    elsif ($ENV{'form.advancedsubmit'} eq 'SEARCH') {
-	return &advancedsearch($r,\%ENV);
+    ##
+    ## Clear out old values from groupsearch database
+    ##
+    untie %groupsearch_db if (tied(%groupsearch_db));
+    if ($ENV{'form.launch'} eq '1') {
+	if (tie(%groupsearch_db,'GDBM_File',$diropendb,&GDBM_WRCREAT(),0640)) {
+	    &start_fresh_session();
+	    untie %groupsearch_db;
+	} else {
+	    $r->print('<html><head></head><body>Unable to tie hash to db '.
+		      'file</body></html>');
+	    return OK;
+	}
+    }
+    ##
+    ## Configure dynamic components of interface
+    ##
+    $hidden_fields = '<input type="hidden" name="persistent_db_id" value="'.
+        $ENV{'form.persistent_db_id'}.'" />';
+    ##
+    if ($ENV{'form.catalogmode'} eq 'interactive') {
+        $closebutton="<input type='button' name='close' value='CLOSE' ".
+	    "onClick='self.close()'>"."\n";
+    } elsif ($ENV{'form.catalogmode'} eq 'groupsearch') {
+        $closebutton=<<END;
+<input type='button' name='close' value='CLOSE' onClick='self.close()'>
+END
+        $importbutton=<<END;
+<input type='button' name='import' value='IMPORT'
+onClick='javascript:select_group()'>
+END
+    } else {
+        $closebutton = '';
+        $importbutton = '';
+    }
+    ##
+    ## Sanity checks on form elements
+    ##
+    if (!defined($ENV{'form.viewselect'})) {
+        $ENV{'form.viewselect'} ="Detailed Citation View";
+    }
+    $ENV{'form.phase'} = 'disp_basic' if (! exists($ENV{'form.phase'}));
+    ##
+    ## Switch on the phase
+    ##
+    if ($ENV{'form.phase'} eq 'disp_basic') {
+        &print_basic_search_form($r,$closebutton);
+    } elsif ($ENV{'form.phase'} eq 'disp_adv') {
+        &print_advanced_search_form($r,$closebutton);
+    } elsif ($ENV{'form.phase'} eq 'results') {
+        &display_results($r,$importbutton,$closebutton);
+    } elsif($ENV{'form.phase'} eq 'run_search') {
+        my ($query,$customquery,$customshow,$libraries,$pretty_string) =
+            &get_persistent_data($persistent_db_file,
+                 ['query','customquery','customshow',
+                  'libraries','pretty_string']);
+        &write_status($r,"query         = $query");
+        &write_status($r,"customquery   = $customquery");
+        &write_status($r,"customshow    = $customshow");
+        &write_status($r,"libraries     = $libraries");
+        &write_status($r,"pretty_string = $pretty_string");
+        &run_search($r,$query,$customquery,$customshow,
+                    $libraries,$pretty_string);
+    } elsif(($ENV{'form.phase'} eq 'basic_search') ||
+            ($ENV{'form.phase'} eq 'adv_search')) {
+        # Set up table
+        if (! defined(&create_results_table())) {
+            $r->print(<<END);
+<html><head><title>Search Error</title></head>
+<body>
+Unable to create table in which to store search results.  
+The search has been aborted.
+</body>
+</html>
+END
+            return OK;
+        }
+        delete($ENV{'form.launch'});
+        if (! &make_form_data_persistent($r,$persistent_db_file)) {
+            $r->print(<<END);
+<html><head><title>Search Error</title></head>
+<body>
+Unable to properly store search information.  The search has been aborted.
+</body>
+</html>
+END
+            return OK;
+        }
+        #
+        # We are running a search
+        my ($query,$customquery,$customshow,$libraries) = 
+            (undef,undef,undef,undef);
+        my $pretty_string;
+        if ($ENV{'form.phase'} eq 'basic_search') {
+            ($query,$pretty_string) = &parse_basic_search($r,$closebutton);
+        } else {                      # Advanced search
+            ($query,$customquery,$customshow,$libraries,$pretty_string) 
+                = &parse_advanced_search($r,$closebutton);
+            return OK if (! defined($query));
+        }
+        &make_persistent($r,
+                         { query => $query,
+                           customquery => $customquery,
+                           customshow => $customshow,
+                           libraries => $libraries,
+                           pretty_string => $pretty_string },
+                         $persistent_db_file);
+        ##
+        ## Print out the frames interface
+        ##
+        &print_frames_interface($r);
     }
+    return OK;
+} 
+
+######################################################################
+######################################################################
+
+=pod 
+
+=item &print_basic_search_form() 
 
-    $scrout=''; # building a part of screen output
-    $scrout.=&searchphrasefield('Limit by title','title',
-			$ENV{'form.title'});
+Returns a scalar which holds html for the basic search form.
 
-    $scrout.=&searchphrasefield('Limit by author','author',
-			$ENV{'form.author'});
+=cut
 
-    $scrout.=&searchphrasefield('Limit by subject','subject',
-			$ENV{'form.subject'});
+######################################################################
+######################################################################
 
-    $scrout.=&searchphrasefield('Limit by keywords','keywords',
-			$ENV{'form.keywords'});
+sub print_basic_search_form{
+    my ($r,$closebutton) = @_;
+    my $scrout=<<"ENDDOCUMENT";
+<html>
+<head>
+<title>The LearningOnline Network with CAPA</title>
+<script type="text/javascript">
+    function openhelp(val) {
+	openhelpwin=open('/adm/help/searchcat.html','helpscreen',
+	     'scrollbars=1,width=600,height=300');
+	openhelpwin.focus();
+    }
+</script>
+</head>
+<body bgcolor="#FFFFFF">
+<img align='right' src='/adm/lonIcons/lonlogos.gif' />
+<h1>Search Catalog</h1>
+<form method="post" action="/adm/searchcat">
+<input type="hidden" name="phase" value="basic_search" />
+$hidden_fields
+<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>';
+    my $checkbox = &simplecheckbox('related',$ENV{'form.related'});
+    $scrout.=<<END;
+</td><td><a href="/adm/searchcat?phase=disp_adv">Advanced Search</a></td></tr>
+<tr><td>$checkbox use related words</td><td></td></tr>
+</table>
+</p>
+<p>
+&nbsp;<input type="submit" name="basicsubmit" value='SEARCH' />&nbsp;
+$closebutton
+END
+    $scrout.=&selectbox(undef,'viewselect',
+			$ENV{'form.viewselect'},
+			undef,undef,undef,
+			sort(keys(%Views)));
+    $scrout.=<<ENDDOCUMENT;
+<input type="button" value="HELP" onClick="openhelp()" />
+</p>
+</form>
+</body>
+</html>
+ENDDOCUMENT
+    $r->print($scrout);
+    return;
+}
+######################################################################
+######################################################################
 
-    $scrout.=&searchphrasefield('Limit by URL','url',
-			$ENV{'form.url'});
+=pod 
 
-    $scrout.=&searchphrasefield('Limit by version','version',
-			$ENV{'form.version'});
+=item &advanced_search_form() 
 
-    $scrout.=&searchphrasefield('Limit by notes','notes',
-			$ENV{'form.notes'});
+Returns a scalar which holds html for the advanced search form.
 
-    $scrout.=&searchphrasefield('Limit by abstract','abstract',
-			$ENV{'form.abstract'});
+=cut
 
-    $ENV{'form.mime'}='notxxx' unless length($ENV{'form.mime'});
-    $scrout.=&selectbox('Limit by MIME type','mime',
-			$ENV{'form.mime'},%mimetag);
+######################################################################
+######################################################################
 
+sub print_advanced_search_form{
+    my ($r,$closebutton) = @_;
+    my $advanced_buttons = <<"END";
+<p>
+<input type="submit" name="advancedsubmit" value='SEARCH' />
+<input type="reset" name="reset" value='RESET' />
+$closebutton
+<input type="button" value="HELP" onClick="openhelp()" />
+</p>
+END
+    if (!defined($ENV{'form.viewselect'})) {
+        $ENV{'form.viewselect'} ="Detailed Citation View";
+    }
+    my $scrout=<<"ENDHEADER";
+<html>
+<head>
+<title>The LearningOnline Network with CAPA</title>
+<script type="text/javascript">
+    function openhelp(val) {
+	openhelpwin=open('/adm/help/searchcat.html','helpscreen',
+	     'scrollbars=1,width=600,height=300');
+	openhelpwin.focus();
+    }
+</script>
+</head>
+<body bgcolor="#FFFFFF">
+<img align='right' src='/adm/lonIcons/lonlogos.gif' />
+<h1>Advanced Catalog Search</h1>
+<hr />
+Enter terms or phrases separated by search operators 
+such as AND, OR, or NOT.<br />
+<form method="post" action="/adm/searchcat">
+$advanced_buttons
+$hidden_fields
+<input type="hidden" name="phase" value="adv_search" />
+<table>
+<tr><td><font color="#800000" face="helvetica"><b>VIEW:</b></font></td>
+<td>
+ENDHEADER
+    $scrout.=&selectbox(undef,'viewselect',
+			$ENV{'form.viewselect'},
+			undef,undef,undef,
+			sort(keys(%Views)));
+    $scrout.="</td><td>Related<br />Words</td></tr>\n";
+    $scrout.=&searchphrasefield_with_related('title',   'title'   ,
+                                             $ENV{'form.title'});
+    $scrout.=&searchphrasefield('author',  'author'  ,$ENV{'form.author'});
+    $scrout.=&searchphrasefield_with_related('subject', 'subject' ,
+                                             $ENV{'form.subject'});
+    $scrout.=&searchphrasefield_with_related('keywords','keywords',
+                                             $ENV{'form.keywords'});
+    $scrout.=&searchphrasefield('URL',     'url'     ,$ENV{'form.url'});
+    $scrout.=&searchphrasefield_with_related('notes',   'notes'   ,
+                                             $ENV{'form.notes'});
+    $scrout.=&searchphrasefield_with_related('abstract','abstract',
+                                             $ENV{'form.abstract'});
+    # Hack - an empty table row.
+    $scrout.="<tr><td>&nbsp;</td><td>&nbsp;</td><td>&nbsp;</td></tr>\n";
+    $scrout.=&searchphrasefield('file<br />extension','mime',
+                        $ENV{'form.mime'});
+    $scrout.="<tr><td>&nbsp;</td><td>&nbsp;</td><td>&nbsp;</td></tr>\n";
+    $scrout.=&searchphrasefield('publisher<br />owner','owner',
+				$ENV{'form.owner'});
+    $scrout.="</table>\n";
+    $ENV{'form.category'}='any' unless length($ENV{'form.category'});
+    $scrout.=&selectbox('File Category','category',
+			$ENV{'form.category'},
+			'any','Any category',
+			undef,
+			(&Apache::loncommon::filecategories()));
     $ENV{'form.language'}='any' unless length($ENV{'form.language'});
-
+    #----------------------------------------------------------------
+    # Allow restriction to multiple domains.
+    #   I make the crazy assumption that there will never be a domain 'any'.
+    #
+    $ENV{'form.domains'} = 'any' if (! exists($ENV{'form.domains'}));
+    my @allowed_domains = (ref($ENV{'form.domains'}) ? @{$ENV{'form.domains'}} 
+                           :  ($ENV{'form.domains'}) );
+    my %domain_hash = ();
+    foreach (@allowed_domains) {
+        $domain_hash{$_}++;
+    }
+    my @domains =&Apache::loncommon::get_domains();
+    # adjust the size of the select box
+    my $size = 4;
+    my $size = (scalar @domains < ($size - 1) ? scalar @domains + 1 : $size);
+    $scrout.="\n".'<font color="#800000" face="helvetica"><b>'.
+        'DOMAINS</b></font><br />'.
+            '<select name="domains" size="'.$size.'" multiple>'."\n".
+                '<option name="any" value="any" '.
+                    ($domain_hash{'any'}? 'selected ' :'').
+                        '>all domains</option>'."\n";
+    foreach my $dom (sort @domains) {
+        $scrout.="<option name=\"$dom\" ".
+            ($domain_hash{$dom} ? 'selected ' :'').">$dom</option>\n";
+    }
+    $scrout.="</select>\n";
+    #----------------------------------------------------------------
     $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
     $scrout.=<<CREATIONDATESTART;
 <p>
 <font color="#800000" face="helvetica"><b>LIMIT BY CREATION DATE RANGE:</b>
 </font>
-<br>
+<br />
 between:
 CREATIONDATESTART
     $scrout.=&dateboxes('creationdatestart',1,1,1976,
@@ -166,21 +532,18 @@ CREATIONDATESTART
 			$ENV{'form.creationdatestart_day'},
 			$ENV{'form.creationdatestart_year'},
 			);
-    $scrout.=<<CREATIONDATEEND;
-and:
-CREATIONDATEEND
+    $scrout.="and:\n";
     $scrout.=&dateboxes('creationdateend',12,31,2051,
 			$ENV{'form.creationdateend_month'},
 			$ENV{'form.creationdateend_day'},
 			$ENV{'form.creationdateend_year'},
 			);
     $scrout.="</p>";
-
     $scrout.=<<LASTREVISIONDATESTART;
 <p>
 <font color="#800000" face="helvetica"><b>LIMIT BY LAST REVISION DATE RANGE:
 </b></font>
-<br>between:
+<br />between:
 LASTREVISIONDATESTART
     $scrout.=&dateboxes('lastrevisiondatestart',1,1,1976,
 			$ENV{'form.lastrevisiondatestart_month'},
@@ -196,264 +559,543 @@ LASTREVISIONDATEEND
 			$ENV{'form.lastrevisiondateend_year'},
 			);
     $scrout.='</p>';
-
-    $scrout.=&searchphrasefield('Limit by publisher/owner','owner',
-				$ENV{'form.owner'});
-#			$metadatafields{'owner'});
-
     $ENV{'form.copyright'}='any' unless length($ENV{'form.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
     $scrout.=<<CUSTOMMETADATA;
 <p>
-<font color="#800000" face="helvetica"><b>LIMIT BY OTHER METADATA FIELDS:</b>
+<font color="#800000" face="helvetica"><b>LIMIT BY SPECIAL METADATA FIELDS:</b>
 </font>
-For author-specific metadata, enter in an expression in the form of 
-<i>key</i>=<i>value</i> separated by operators such as AND or OR.<br>
+For resource-specific metadata, enter in an expression in the form of 
+<i>key</i>=<i>value</i> separated by operators such as AND, OR or NOT.<br />
 <b>Example:</b> grandmother=75 OR grandfather=85
-<br>
+<br />
 CUSTOMMETADATA
-$scrout.=&simpletextfield('custommetadata',$ENV{'form.custommetadata'});
-$scrout.=' <i>initial users of this system do not need to worry about this option</i>';
-
-# ---------------------------------------------------------------- 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>
+    $scrout.=&simpletextfield('custommetadata',$ENV{'form.custommetadata'});
+    $scrout.=<<CUSTOMSHOW;
 <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'}));
-    $r->print(<<ENDDOCUMENT);
-<font color="#800000">Search historic archives</font>
-<br>
-<input type="submit" name="basicsubmit" value="SEARCH">
-<input type="reset" name="reset" value="RESET">
-<input type="button" name="close" value="CLOSE" onClick="self.close()">
-</p>
-<hr>
-<h3>Advanced Search</h3>
-$scrout
-<p>
-<input type="submit" name="advancedsubmit" value="SEARCH">
-<input type="reset" name="reset" value="RESET">
-<input type="button" name="close" value="CLOSE" onClick="self.close()">
-</p>
+<font color="#800000" face="helvetica"><b>SHOW SPECIAL METADATA FIELDS:</b>
+</font>
+Enter in a space-separated list of special metadata fields to show
+in a fielded listing for each record result.
+<br />
+CUSTOMSHOW
+    $scrout.=&simpletextfield('customshow',$ENV{'form.customshow'});
+    $scrout.=<<ENDDOCUMENT;
+$advanced_buttons
 </form>
 </body>
 </html>
 ENDDOCUMENT
-    return OK;
-} 
+    $r->print($scrout);
+    return;
+}
+
+######################################################################
+######################################################################
+
+=pod 
+
+=item &get_persistent_form_data
+
+Inputs: filename of database
+
+Outputs: returns undef on database errors.
+
+This function is the reverse of &make_persistent() for form data.
+Retrieve persistent data from %persistent_db.  Retrieved items will have their
+values unescaped.  If a form value already exists in $ENV, it will not be
+overwritten.  Form values that are array references may have values appended
+to them.
+
+=cut
+
+######################################################################
+######################################################################
+sub get_persistent_form_data {
+    my $r = shift;
+    my $filename = shift;
+    return 0 if (! -e $filename);
+    return undef if (! tie(%persistent_db,'GDBM_File',$filename,
+                           &GDBM_READER(),0640));
+    #
+    # These make sure we do not get array references printed out as 'values'.
+    my %arrays_allowed = ('form.category'=>1,'form.domains'=>1);
+    #
+    # Loop through the keys, looking for 'form.'
+    foreach my $name (keys(%persistent_db)) {
+        next if ($name !~ /^form./);
+        my @values = map { 
+            &Apache::lonnet::unescape($_);
+        } split(',',$persistent_db{$name});
+        next if (@values <1);
+        if (exists($ENV{$name})) {
+            if (ref($ENV{$name}) eq 'ARRAY') {
+                # If it is an array, tack @values on the end of it.
+                $ENV{$name} = [@$ENV{$name},@values];
+            } elsif (! ref($ENV{$name}) && $arrays_allowed{$name}) {
+                # if arrays are allowed, turn it into one and add @values
+                $ENV{$name} = [$ENV{$name},@values];
+            } # otherwise, assume the value in $ENV{$name} is better than ours.
+        } else {
+            if ($arrays_allowed{$name}) {
+                $ENV{$name} = [@values];
+            } else {
+                $ENV{$name} = $values[0] if ($values[0]);
+            }
+        }
+    }
+    untie (%persistent_db);
+    return 1;
+}
+######################################################################
+######################################################################
+
+=pod 
+
+=item &get_persistent_data
+
+Inputs: filename of database, ref to array of values to recover.
+
+Outputs: array of values.  Returns undef on error.
+
+This function is the reverse of &make_persistent();
+Retrieve persistent data from %persistent_db.  Retrieved items will have their
+values unescaped.  If the item contains commas (before unescaping), the
+returned value will be an array pointer. 
+
+=cut
+
+######################################################################
+######################################################################
+sub get_persistent_data {
+    my $filename = shift;
+    my @Vars = @{shift()};
+    my @Values;   # Return array
+    return undef if (! -e $filename);
+    return undef if (! tie(%persistent_db,'GDBM_File',$filename,
+                           &GDBM_READER(),0640));
+    foreach my $name (@Vars) {
+        if (! exists($persistent_db{$name})) {
+            push @Values, undef;
+            next;
+        }
+        my @values = map { 
+            &Apache::lonnet::unescape($_);
+        } split(',',$persistent_db{$name});
+        if (@values == 1) {
+            push @Values,$values[0];
+        } else {
+            push @Values,\@values;
+        }
+    }
+    untie (%persistent_db);
+    return @Values;
+}
+
+######################################################################
+######################################################################
+
+=pod 
+
+=item &make_persistent() 
+
+Inputs: Hash of values to save, filename of persistent database.
+
+Store variables away to the %persistent_db.
+Values will be escaped.  Values that are array pointers will have their
+elements escaped and concatenated in a comma seperated string.  
+
+=cut
+
+######################################################################
+######################################################################
+sub make_persistent {
+    my $r = shift;
+    my %save = %{shift()};
+    my $filename = shift;
+    return undef if (! tie(%persistent_db,'GDBM_File',
+                           $filename,&GDBM_WRCREAT(),0640));
+    foreach my $name (keys(%save)) {
+        next if (! exists($save{$name}));
+        next if (! defined($save{$name}) || $save{$name} eq '');
+        my @values = (ref($save{$name}) ? @{$save{$name}} : ($save{$name}));
+        # We handle array references, but not recursively.
+        my $store = join(',', map { &Apache::lonnet::escape($_); } @values );
+        $persistent_db{$name} = $store;
+    }
+    untie(%persistent_db);
+    return 1;
+}
+
+######################################################################
+######################################################################
+
+=pod 
+
+=item &make_form_data_persistent() 
+
+Inputs: filename of persistent database.
+
+Store most form variables away to the %persistent_db.
+Values will be escaped.  Values that are array pointers will have their
+elements escaped and concatenated in a comma seperated string.  
+
+=cut
+
+######################################################################
+######################################################################
+sub make_form_data_persistent {
+    my $r = shift;
+    my $filename = shift;
+    my %save;
+    foreach (keys(%ENV)) {
+        next if (! /^form/ || /submit/);
+        $save{$_} = $ENV{$_};
+    }
+    return &make_persistent($r,\%save,$filename);
+}
+
+######################################################################
+#                HTML form building functions                        #  
+######################################################################
+
+=pod 
+
+=item HTML form building functions
+
+=over 4
+
+=cut
 
-# --------------------------------------------------------- Various form fields
+###############################################
+###############################################
+
+=pod
+
+=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.
+
+=cut
+
+###############################################
+###############################################
 
 sub simpletextfield {
-    my ($name,$value)=@_;
-    return '<input type=text name="'.$name.'" size=20 value="'.$value.'">';
+    my ($name,$value,$size)=@_;
+    $size = 20 if (! defined($size));
+    return '<input type="text" name="'.$name.
+        '" size="'.$size.'" value="'.$value.'" />';
 }
 
+###############################################
+###############################################
+
+=pod
+
+=item &simplecheckbox()
+
+Inputs: $name,$value
+
+Returns a simple check box with the given $name.
+If $value eq 'on' the box is checked.
+
+=cut
+
+###############################################
+###############################################
+
 sub simplecheckbox {
     my ($name,$value)=@_;
     my $checked='';
-    $checked="CHECKED" if $value eq 'on';
-    return '<input type=checkbox name="'.$name.'" '. $checked . '>';
+    $checked="checked" if $value eq 'on';
+    return '<input type="checkbox" name="'.$name.'" '. $checked . ' />';
+}
+
+###############################################
+###############################################
+
+=pod
+
+=item &fieldtitle()
+
+Input: $title
+
+Returns a scalar with html which will display $title as a search
+field heading.
+
+=cut
+
+###############################################
+###############################################
+
+sub fieldtitle {
+    my $title = uc(shift());
+    return '<font color="#800000" face="helvetica"><b>'.$title.
+        ':&nbsp;</b></font>';
 }
 
+###############################################
+###############################################
+
+=pod
+
+=item &searchphrasefield()
+
+Inputs: $title,$name,$value
+
+Returns html for a title line and an input field for entering search terms.
+The entry field (which is where the $name and $value are used) is a 50 column 
+simpletextfield.  The html returned is for a row in a three column table.
+
+=cut
+
+###############################################
+###############################################
+    
 sub searchphrasefield {
     my ($title,$name,$value)=@_;
-    my $instruction=<<END;
-Enter terms or phrases separated by search operators such
-as AND or OR.
-END
-    my $uctitle=uc($title);
-    return "\n<p><font color=\"#800000\" face=\"helvetica\"><b>$uctitle:</b>".
-	   "</FONT> $instruction<br>".
-           '<input type=text name="'.$name.'" size=80 value="'.$value.'">';
+    return '<tr><td>'.&fieldtitle($title).'</td><td>'.
+        &simpletextfield($name,$value,50)."</td><td>&nbsp;</td></tr>\n";
 }
 
+###############################################
+###############################################
+
+=pod
+
+=item &searchphrasefield_with_related()
+
+Inputs: $title,$name,$value
+
+Returns html for a title line and an input field for entering search terms
+and a check box for 'related words'.  The entry field (which is where the 
+$name and $value are used) is a 50 column simpletextfield.  The name of
+the related words checkbox is "$name_related".
+
+=cut
+
+###############################################
+###############################################
+    
+sub searchphrasefield_with_related {
+    my ($title,$name,$value)=@_;
+    return '<tr><td>'.&fieldtitle($title).'</td><td>'.
+        &simpletextfield($name,$value,50).'</td><td align="center">&nbsp;'.
+            &simplecheckbox($name.'_related',$ENV{'form.'.$name.'_related'}).
+                "&nbsp;</td></tr>\n";
+}
+
+###############################################
+###############################################
+
+=pod
+
+=item &dateboxes()
+
+Returns html selection form elements for the specification of 
+the day, month, and year.
+
+=cut
+
+###############################################
+###############################################
+
 sub dateboxes {
     my ($name,$defaultmonth,$defaultday,$defaultyear,
 	$currentmonth,$currentday,$currentyear)=@_;
     ($defaultmonth,$defaultday,$defaultyear)=('','','');
-    my $month=<<END;
-<select name="${name}_month">
-<option value='$defaultmonth'> </option>
-<option value="1">January</option>
-<option value="2">February</option>
-<option value="3">March</option>
-<option value="4">April</option>
-<option value="5">May</option>
-<option value="6">June</option>
-<option value="7">July</option>
-<option value="8">August</option>
-<option value="9">September</option>
-<option value="10">October</option>
-<option value="11">November</option>
-<option value="12">December</option>
-</select>
-END
-    $month=~s/(\"$currentmonth\")/$1 SELECTED/ if length($currentmonth);
+    #
+    # Day
     my $day=<<END;
 <select name="${name}_day">
 <option value='$defaultday'> </option>
-<option value="1">1</option>
-<option value="2">2</option>
-<option value="3">3</option>
-<option value="4">4</option>
-<option value="5">5</option>
-<option value="6">6</option>
-<option value="7">7</option>
-<option value="8">8</option>
-<option value="9">9</option>
-<option value="10">10</option>
-<option value="11">11</option>
-<option value="12">12</option>
-<option value="13">13</option>
-<option value="14">14</option>
-<option value="15">15</option>
-<option value="16">16</option>
-<option value="17">17</option>
-<option value="18">18</option>
-<option value="19">19</option>
-<option value="20">20</option>
-<option value="21">21</option>
-<option value="22">22</option>
-<option value="23">23</option>
-<option value="24">24</option>
-<option value="25">25</option>
-<option value="26">26</option>
-<option value="27">27</option>
-<option value="28">28</option>
-<option value="29">29</option>
-<option value="30">30</option>
-<option value="31">31</option>
-</select>
 END
+    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);
+    #
+    # 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 $year=<<END;
 <select name="${name}_year">
 <option value='$defaultyear'> </option>
-<option value="1976">1976</option>
-<option value="1977">1977</option>
-<option value="1978">1978</option>
-<option value="1979">1979</option>
-<option value="1980">1980</option>
-<option value="1981">1981</option>
-<option value="1982">1982</option>
-<option value="1983">1983</option>
-<option value="1984">1984</option>
-<option value="1985">1985</option>
-<option value="1986">1986</option>
-<option value="1987">1987</option>
-<option value="1988">1988</option>
-<option value="1989">1989</option>
-<option value="1990">1990</option>
-<option value="1991">1991</option>
-<option value="1992">1992</option>
-<option value="1993">1993</option>
-<option value="1994">1994</option>
-<option value="1995">1995</option>
-<option value="1996">1996</option>
-<option value="1997">1997</option>
-<option value="1998">1998</option>
-<option value="1999">1999</option>
-<option value="2000">2000</option>
-<option value="2001">2001</option>
-<option value="2002">2002</option>
-<option value="2003">2003</option>
-<option value="2004">2004</option>
-<option value="2005">2005</option>
-<option value="2006">2006</option>
-<option value="2007">2007</option>
-<option value="2008">2008</option>
-<option value="2009">2009</option>
-<option value="2010">2010</option>
-<option value="2011">2011</option>
-<option value="2012">2012</option>
-<option value="2013">2013</option>
-<option value="2014">2014</option>
-<option value="2015">2015</option>
-<option value="2016">2016</option>
-<option value="2017">2017</option>
-<option value="2018">2018</option>
-<option value="2019">2019</option>
-<option value="2020">2020</option>
-<option value="2021">2021</option>
-<option value="2022">2022</option>
-<option value="2023">2023</option>
-<option value="2024">2024</option>
-<option value="2025">2025</option>
-<option value="2026">2026</option>
-<option value="2027">2027</option>
-<option value="2028">2028</option>
-<option value="2029">2029</option>
-<option value="2030">2030</option>
-<option value="2031">2031</option>
-<option value="2032">2032</option>
-<option value="2033">2033</option>
-<option value="2034">2034</option>
-<option value="2035">2035</option>
-<option value="2036">2036</option>
-<option value="2037">2037</option>
-<option value="2038">2038</option>
-<option value="2039">2039</option>
-<option value="2040">2040</option>
-<option value="2041">2041</option>
-<option value="2042">2042</option>
-<option value="2043">2043</option>
-<option value="2044">2044</option>
-<option value="2045">2045</option>
-<option value="2046">2046</option>
-<option value="2047">2047</option>
-<option value="2048">2048</option>
-<option value="2049">2049</option>
-<option value="2050">2050</option>
-<option value="2051">2051</option>
-</select>
 END
+    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);
     return "$month$day$year";
 }
 
+###############################################
+###############################################
+
+=pod
+
+=item &selectbox()
+
+Returns a scalar containing an html <select> form.  
+
+Inputs: 
+
+=over 4
+
+=item $title 
+
+Printed above the select box, in uppercase.  If undefined, only a select
+box will be returned, with no additional html.
+
+=item $name 
+
+The name element of the <select> tag.
+
+=item $default 
+
+The default value of the form.  Can be $anyvalue, or in @idlist.
+
+=item $anyvalue 
+
+The <option value="..."> used to indicate a default of 
+none of the values.  Can be undef.
+
+=item $anytag 
+
+The text associate with $anyvalue above.
+
+=item $functionref 
+
+Each element in @idlist will be passed as a parameter 
+to the function referenced here.  The return value of the function should
+be a scalar description of the items.  If this value is undefined the 
+description of each item in @idlist will be the item name.
+
+=item @idlist 
+
+The items to be selected from.  One of these or $anyvalue will be the 
+value returned by the form element, $ENV{form.$name}.
+
+=back
+
+=cut
+
+###############################################
+
 sub selectbox {
-    my ($title,$name,$value,%options)=@_;
-    my $uctitle=uc($title);
-    my $selout="\n<p><font color=\"#800000\" face=\"helvetica\"><b>$uctitle:".
-	"</b></font><br>".'<select name="'.$name.'">';
-    map {
+    my ($title,$name,$default,$anyvalue,$anytag,$functionref,@idlist)=@_;
+    if (! defined($functionref)) { $functionref = sub { $_[0]}; }
+    my $selout='';
+    if (defined($title)) {
+        my $uctitle=uc($title);
+        $selout="\n".'<p><font color="#800000" face="helvetica">'.
+            '<b>'.$uctitle.': </b></font>';
+    }
+    $selout .= '<select name="'.$name.'">';
+    unshift @idlist,$anyvalue if (defined($anyvalue));
+    foreach (@idlist) {
         $selout.='<option value="'.$_.'"';
-        if ($_ eq $value) { $selout.=' selected'; }
-        $selout.='>'.$options{$_}.'</option>';
-    } sort keys %options;
-    return $selout.'</select>';
+        if ($_ eq $default and !/^any$/) {
+	    $selout.=' selected >'.&{$functionref}($_).'</option>';
+	}
+	elsif ($_ eq $default and /^$anyvalue$/) {
+	    $selout.=' selected >'.$anytag.'</option>';
+	}
+        else {$selout.='>'.&{$functionref}($_).'</option>';}
+    }
+    return $selout.'</select>'.(defined($title)?'</p>':' ');
 }
 
-# ------------------------------------------------ Performing a advanced search
-sub advancedsearch {
-    my ($r,$envhash)=@_;
-    my %ENV=%{$envhash};
+######################################################################
+#                End of HTML form building functions                 #  
+######################################################################
+
+=pod
+
+=back 
+
+=cut
+
+
+######################################################################
+######################################################################
+
+=pod 
+
+=item &parse_advanced_search()
 
+Parse advanced search form and return the following:
+
+=over 4
+
+=item $query Scalar containing an SQL query.
+
+=item $customquery Scalar containing a custom query.
+
+=item $customshow Scalar containing commands to show custom metadata.
+
+=item $libraries_to_query Reference to array of domains to search.
+
+=back
+
+=cut
+
+######################################################################
+######################################################################
+sub parse_advanced_search {
+    my ($r,$closebutton)=@_;
     my $fillflag=0;
+    my $pretty_search_string = "<br />\n";
+    # Clean up fields for safety
+    for my $field ('title','author','subject','keywords','url','version',
+		   'creationdatestart_month','creationdatestart_day',
+		   'creationdatestart_year','creationdateend_month',
+		   'creationdateend_day','creationdateend_year',
+		   'lastrevisiondatestart_month','lastrevisiondatestart_day',
+		   'lastrevisiondatestart_year','lastrevisiondateend_month',
+		   'lastrevisiondateend_day','lastrevisiondateend_year',
+		   'notes','abstract','mime','language','owner',
+		   'custommetadata','customshow','category') {
+	$ENV{"form.$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;
+    }
+    # Preprocess the category form element.
+    if ($ENV{'form.category'} ne 'any') {
+        my @extensions = &Apache::loncommon::filecategorytypes
+            ($ENV{'form.category'});
+        $ENV{'form.mime'} = join ' OR ',@extensions;
+    }
+    # Check to see if enough information was filled in
     for my $field ('title','author','subject','keywords','url','version',
 		   'notes','abstract','mime','language','owner',
 		   'custommetadata') {
@@ -461,37 +1103,1436 @@ sub advancedsearch {
 	    $fillflag++;
 	}
     }
-
     unless ($fillflag) {
-	&output_blank_field_error($r);
-	return OK;
+	&output_blank_field_error($r,$closebutton);
+	return ;
+    }
+    # Turn the form input into a SQL-based query
+    my $query='';
+    my @queries;
+    my $font = '<font color="#800000" face="helvetica">';
+    # Evaluate logical expression AND/OR/NOT phrase fields.
+    foreach my $field ('title','author','subject','notes','abstract','url',
+		       'keywords','version','owner','mime') {
+	if ($ENV{'form.'.$field}) {
+            my $searchphrase = $ENV{'form.'.$field};
+            $pretty_search_string .= $font."$field</font> contains <b>".
+                $searchphrase."</b>";
+            if ($ENV{'form.'.$field.'_related'}) {
+                my @New_Words;
+                ($searchphrase,@New_Words) = &related_version($searchphrase);
+                if (@New_Words) {
+                    $pretty_search_string .= " with related words: ".
+                        "<b>@New_Words</b>.";
+                } else {
+                    $pretty_search_string .= " with no related words.";
+                }
+            }
+            $pretty_search_string .= "<br />\n";
+	    push @queries,&build_SQL_query($field,$searchphrase);
+        }
+    }
+    # I dislike the hack below.
+    if ($ENV{'form.category'}) {
+        $ENV{'form.mime'}='';
     }
+    # Evaluate option lists
+    if ($ENV{'form.language'} and $ENV{'form.language'} ne 'any') {
+	push @queries,"(language like \"$ENV{'form.language'}\")";
+        $pretty_search_string.=$font."language</font>= ".
+            &Apache::loncommon::languagedescription($ENV{'form.language'}).
+                "<br />\n";
+    }
+    if ($ENV{'form.copyright'} and $ENV{'form.copyright'} ne 'any') {
+	push @queries,"(copyright like \"$ENV{'form.copyright'}\")";
+        $pretty_search_string.=$font."copyright</font> = ".
+            &Apache::loncommon::copyrightdescription($ENV{'form.copyright'}).
+                "<br \>\n";
+    }
+    #
+    # Evaluate date windows
+    my $datequery=&build_date_queries(
+			$ENV{'form.creationdatestart_month'},
+			$ENV{'form.creationdatestart_day'},
+			$ENV{'form.creationdatestart_year'},
+			$ENV{'form.creationdateend_month'},
+			$ENV{'form.creationdateend_day'},
+			$ENV{'form.creationdateend_year'},
+			$ENV{'form.lastrevisiondatestart_month'},
+			$ENV{'form.lastrevisiondatestart_day'},
+			$ENV{'form.lastrevisiondatestart_year'},
+			$ENV{'form.lastrevisiondateend_month'},
+			$ENV{'form.lastrevisiondateend_day'},
+			$ENV{'form.lastrevisiondateend_year'},
+			);
+    # Test to see if date windows are legitimate
+    if ($datequery=~/^Incorrect/) {
+	&output_date_error($r,$datequery,$closebutton);
+	return ;
+    } elsif ($datequery) {
+        # Here is where you would set up pretty_search_string to output
+        # date query information.
+	push @queries,$datequery;
+    }
+    # Process form information for custom metadata querying
+    my $customquery=undef;
+    if ($ENV{'form.custommetadata'}) {
+        $pretty_search_string .=$font."Custom Metadata Search</font>: <b>".
+            $ENV{'form.custommetadata'}."</b><br />\n";
+	$customquery=&build_custommetadata_query('custommetadata',
+				      $ENV{'form.custommetadata'});
+    }
+    my $customshow=undef;
+    if ($ENV{'form.customshow'}) {
+        $pretty_search_string .=$font."Custom Metadata Display</font>: <b>".
+            $ENV{'form.customshow'}."</b><br />\n";
+	$customshow=$ENV{'form.customshow'};
+	$customshow=~s/[^\w\s]//g;
+	my @fields=split(/\s+/,$customshow);
+	$customshow=join(" ",@fields);
+    }
+    ## ---------------------------------------------------------------
+    ## Deal with restrictions to given domains
+    ## 
+    my $libraries_to_query = undef;
+    # $ENV{'form.domains'} can be either a scalar or an array reference.
+    # We need an array.
+    my @allowed_domains = (ref($ENV{'form.domains'}) ? @{$ENV{'form.domains'}} 
+                           :  ($ENV{'form.domains'}) );
+    my %domain_hash = ();
+    my $pretty_domains_string;
+    foreach (@allowed_domains) {
+        $domain_hash{$_}++;
+    }
+    if ($domain_hash{'any'}) {
+        $pretty_domains_string = "Searching all domains.";
+    } else {
+        if (@allowed_domains > 1) {
+            $pretty_domains_string = "Searching domains:";
+        } else {
+            $pretty_domains_string = "Searching domain ";
+        }
+        foreach (sort @allowed_domains) {
+            $pretty_domains_string .= "<b>$_</b> ";
+        }
+        foreach (keys(%Apache::lonnet::libserv)) {
+            if (exists($domain_hash{$Apache::lonnet::hostdom{$_}})) {
+                push @$libraries_to_query,$_;
+            }
+        }
+    }
+    $pretty_search_string .= $pretty_domains_string."<br />\n";
+    #
+    if (@queries) {
+	$query=join(" AND ",@queries);
+	$query="select * from metadata where $query";
+    } elsif ($customquery) {
+        $query = '';
+    }
+    return ($query,$customquery,$customshow,$libraries_to_query,
+            $pretty_search_string);
+}
 
+######################################################################
+######################################################################
+
+=pod 
+
+=item &parse_basic_search() 
+
+Parse the basic search form and return a scalar containing an sql query.
+
+=cut
+
+######################################################################
+######################################################################
+sub parse_basic_search {
+    my ($r,$closebutton)=@_;
+    # Clean up fields for safety
+    for my $field ('basicexp') {
+	$ENV{"form.$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($ENV{'form.basicexp'})) {
+	&output_blank_field_error($r,$closebutton);
+	return OK;
+    }
+    my $pretty_search_string = '<b>'.$ENV{'form.basicexp'}.'</b>';
+    my $search_string = $ENV{'form.basicexp'};
+    if ($ENV{'form.related'}) {
+        my @New_Words;
+        ($search_string,@New_Words) = &related_version($ENV{'form.basicexp'});
+        if (@New_Words) {
+            $pretty_search_string .= " with related words: <b>@New_Words</b>.";
+        } else {
+            $pretty_search_string .= " with no related words.";
+        }
+    }
+    # Build SQL query string based on form page
     my $query='';
+    my $concatarg=join(',"    ",',
+		       ('title', 'author', 'subject', 'notes', 'abstract',
+                        'keywords'));
+    $concatarg='title' if $ENV{'form.titleonly'};
+    $query=&build_SQL_query('concat('.$concatarg.')',$search_string);
+    $pretty_search_string .= "<br />\n";
+    return 'select * from metadata where '.$query,$pretty_search_string;
+}
 
-    my $testquery='';
-    # Go through logical expression AND/OR/NOT phrase fields.
-    foreach my $field ('title','author','subject','notes','abstract') {
-	if ($ENV{'form.'.$field}) {
-	    $testquery=build_SQL_query($field,$ENV{'form.'.$field});
+
+######################################################################
+######################################################################
+
+=pod 
+
+=item &related_version
+
+Modifies an input string to include related words.  Words in the string
+are replaced with parenthesized lists of 'OR'd words.  For example
+"torque" is replaced with "(torque OR word1 OR word2 OR ...)".  
+
+Note: Using this twice on a string is probably silly.
+
+=cut
+
+######################################################################
+######################################################################
+sub related_version {
+    my $search_string = shift;
+    my $result = $search_string;
+    my %New_Words = ();
+    while ($search_string =~ /(\w+)/cg) {
+        my $word = $1;
+        next if (lc($word) =~ /\b(or|and|not)\b/);
+        my @Words = &Apache::loncommon::get_related_words($word);
+        @Words = ($#Words>4? @Words[0..4] : @Words);
+        foreach (@Words) { $New_Words{$_}++;}
+        my $replacement = join " OR ", ($word,@Words);
+        $result =~ s/(\b)$word(\b)/$1($replacement)$2/g;
+    }
+    return $result,sort(keys(%New_Words));
+}
+
+######################################################################
+######################################################################
+
+=pod 
+
+=item &build_SQL_query() 
+
+Builds a SQL query string from a logical expression with AND/OR keywords
+using Text::Query and &recursive_SQL_query_builder()
+
+=cut
+
+######################################################################
+######################################################################
+sub build_SQL_query {
+    my ($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 $sql_query;
+}
+
+######################################################################
+######################################################################
+
+=pod 
+
+=item &build_custommetadata_query() 
+
+Constructs a custom metadata query using a rather heinous regular
+expression.
+
+=cut
+
+######################################################################
+######################################################################
+sub build_custommetadata_query {
+    my ($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
+    # wordone=wordtwo becomes\<wordone\>[^\<] *wordtwo[^\<]*\<\/wordone\>
+    $matchexp =~ s/(\w+)\\=([\w\\\+]+)?# wordone=wordtwo is changed to 
+                 /\\<$1\\>?#           \<wordone\>
+                   \[\^\\<\]?#        [^\<]         
+                   \*$2\[\^\\<\]?#           *wordtwo[^\<]
+                   \*\\<\\\/$1\\>?#                        *\<\/wordone\>
+                   /g;
+    return $matchexp;
+}
+
+######################################################################
+######################################################################
+
+=pod 
+
+=item &recursive_SQL_query_build() 
+
+Recursively constructs an SQL query.  Takes as input $dkey and $pattern.
+
+=cut
+
+######################################################################
+######################################################################
+sub recursive_SQL_query_build {
+    my ($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 \"\%$value\%\")";
+	}
+	elsif ($key eq 'not') {
+	    $value=~s/like/not like/;
+#	    $replacement="($dkey not like $value)";
+	    $replacement="$value";
+	}
+	elsif ($key eq 'and') {
+	    $value=~/(.*[\"|\)]) ([|\(|\^].*)/;
+	    $replacement="($1 AND $2)";
 	}
+	elsif ($key eq 'or') {
+	    $value=~/(.*[\"|\)]) ([|\(|\^].*)/;
+	    $replacement="($1 OR $2)";
+	}
+	substr($pattern,
+	       index($pattern,$match),
+	       length($match),
+	       $replacement
+	       );
     }
+    &recursive_SQL_query_build($dkey,$pattern);
+}
 
-#    my $concatarg=join(',"    ",',
-#		       ('title', 'author', 'subject', 'notes', 'abstract'));
+######################################################################
+######################################################################
 
-    $query="select * from metadata where $testquery";
+=pod 
 
-    my $reply=&Apache::lonnet::metadata_query($query);
+=item &build_date_queries() 
 
-    &output_results('Advanced',$r,$envhash,$query,$reply);
-    return OK;
+Builds a SQL logic query to check time/date entries.
+Also reports errors (check for /^Incorrect/).
+
+=cut
+
+######################################################################
+######################################################################
+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 &copyright_check()
+
+=cut
+
+######################################################################
+######################################################################
+
+sub copyright_check {
+    my $Metadata = shift;
+    # Check copyright tags and skip results the user cannot use
+    my (undef,undef,$resdom,$resname) = split('/',
+                                              $Metadata->{'url'});
+    # Check for priv
+    if (($Metadata->{'copyright'} eq 'priv') && 
+        (($ENV{'user.name'} ne $resname) &&
+         ($ENV{'user.domain'} ne $resdom))) {
+        return 0;
+    }
+    # Check for domain
+    if (($Metadata->{'copyright'} eq 'domain') &&
+        ($ENV{'user.domain'} ne $resdom)) {
+        return 0;
+    }
+    return 1;
+}
+
+#####################################################################
+#####################################################################
+
+=pod
+
+=item MySQL Table Description
+
+MySQL table creation requires a precise description of the data to be
+stored.  The use of the correct types to hold data is vital to efficient
+storage and quick retrieval of records.  The columns must be described in
+the following format:
+
+=cut
+
+##
+## Restrictions:
+##    columns of type 'text' and 'blob' cannot have defaults.
+##    columns of type 'enum' cannot be used for FULLTEXT.
+##
+my @DataOrder = qw/id title author subject url keywords version notes
+    abstract mime lang owner copyright creationdate lastrevisiondate hostname/;
+
+my %Datatypes = 
+    ( id        =>{ type         => 'INT',
+                    restrictions => 'NOT NULL',
+                    primary_key  => 'yes',
+                    auto_inc     => 'yes'
+                    },
+      title     =>{ type=>'TEXT'},
+      author    =>{ type=>'TEXT'},
+      subject   =>{ type=>'TEXT'},
+      url       =>{ type=>'TEXT',
+                    restrictions => 'NOT NULL' },
+      keywords  =>{ type=>'TEXT'},
+      version   =>{ type=>'TEXT'},
+      notes     =>{ type=>'TEXT'},
+      abstract  =>{ type=>'TEXT'},
+      mime      =>{ type=>'TEXT'},
+      lang      =>{ type=>'TEXT'},
+      owner     =>{ type=>'TEXT'},
+      copyright =>{ type=>'TEXT'},
+      hostname  =>{ type=>'TEXT'},
+      #--------------------------------------------------
+      creationdate     =>{ type=>'DATETIME'},
+      lastrevisiondate =>{ type=>'DATETIME'},
+      #--------------------------------------------------
+      );
+
+my @Fullindicies = 
+    qw/title author subject abstract mime language owner copyright/;
+    
+######################################################################
+######################################################################
+
+=pod
+
+=item &create_results_table()
+
+Creates the table of search results by calling lonmysql.  Stores the
+table id in $ENV{'form.table'}
+
+Inputs: none.
+
+Returns: the identifier of the table on success, undef on error.
+
+=cut
+
+######################################################################
+######################################################################
+sub create_results_table {
+    my $table = &Apache::lonmysql::create_table
+        ( { columns => \%Datatypes,
+            column_order => \@DataOrder,
+            fullindex => \@Fullindicies,
+        } );
+    if (defined($table)) {
+        $ENV{'form.table'} = $table;
+        return $table;
+    } 
+    return undef; # Error...
+}
+
+######################################################################
+######################################################################
+
+=pod
+
+=item &write_status()
+
+=cut
+
+######################################################################
+######################################################################
+sub write_status {
+    my ($r,$string) = @_;
+    $string =~ s/(\')/\$1/g;
+    $string =~ s/\n//sg;
+#    $r->print("<script>alert('$string');</script>\n");
+#    $r->rflush();
+    return;
+}
+
+######################################################################
+######################################################################
+
+=pod
+
+=item Search Status update functions
+
+Each of the following functions changes the values of one of the
+input fields used to display the search status to the user.
+
+=over 4
+
+=item &update_count_status()
+
+=item &update_contact_status()
+
+=item &update_read_status()
+
+=back
+
+=cut
+
+######################################################################
+######################################################################
+sub update_count_status {
+    my ($r,$text) = @_;
+    $text =~ s/\'/\\\'/g;
+    $r->print
+        ("<script>document.statusform.count.value = ' $text'</script>\n");
+    $r->rflush();
+}
+
+sub update_contact_status {
+    my ($r,$text) = @_;
+    $text =~ s/\'/\\\'/g;
+    $r->print
+        ("<script>document.statusform.c_server.value = ' $text'</script>\n");
+    $r->rflush();
+}
+
+sub update_read_status {
+    my ($r,$text) = @_;
+    $text =~ s/\'/\\\'/g;
+    $r->print
+        ("<script>document.statusform.r_server.value = ' $text'</script>\n");
+    $r->rflush();
+}
+
+######################################################################
+######################################################################
+
+=pod
+
+=item &run_search 
+
+=cut
+
+######################################################################
+######################################################################
+sub run_search {
+    my ($r,$query,$customquery,$customshow,$serverlist,$pretty_string) = @_;
+    my $c = $r->connection;
+    #
+    # Timing variables
+    #
+    my $starttime = time;
+    my $max_time  = 120;  # seconds for the search to complete
+    #
+    # Print run_search header
+    #
+    $r->print("<html><head><title>Search Status</title></head><body>");
+    $r->print("Search: ".$pretty_string."\n");
+    $r->rflush();
+    #
+    # Determine the servers we need to contact.
+    #
+    my @Servers_to_contact;
+    if (defined($serverlist)) {
+        @Servers_to_contact = @$serverlist;
+    } else {
+        @Servers_to_contact = sort(keys(%Apache::lonnet::libserv));
+    }
+    my %Server_status;
+    my $table =$ENV{'form.table'};
+    if (! defined($table) || $table eq '') {
+        $r->print("Unable to determine table id to store search results in.".
+                  "The search has been aborted.</body></html>");
+        return;
+    }
+    my $table_status = &Apache::lonmysql::check_table($table);
+    if (! defined($table_status)) {
+        $r->print("Unable to determine status of table.</body></html>");
+        &Apache::lonnet::logthis("Bogus table id of $table for ".
+                                 "$ENV{'user.name'} @ $ENV{'user.domain'}");
+        &Apache::lonnet::logthis("lonmysql error = ".
+                                 &Apache::lonmysql::get_error());
+        return;
+    }
+    if (! $table_status) {
+        $r->print("The table id,$table, we tried to use is invalid.".
+                  "The search has been aborted.</body></html>");
+        return;
+    }
+    ##
+    ## Prepare for the big loop.
+    ##
+    my $hitcountsum;
+    my $server; 
+    my $status;
+    $r->print(<<END);
+<form name="statusform" action="" method="post">
+<table>
+<tr><th>Contacting</th><th>Receiving</th><th>Total Matches</th></tr>
+<tr>
+<td><input type="text" name="c_server" value="" size="15" /></td>
+<td><input type="text" name="r_server" value="" size="15" /></td>
+<td><input type="text" name="count" value="" size="10" /></td>
+</tr>
+</table>
+</form>
+END
+    $r->rflush();
+    while ((time - $starttime < $max_time) && 
+           ((@Servers_to_contact) || keys(%Server_status))) {
+        # Send out a search request if it needs to be done.
+        if (@Servers_to_contact) {
+            # Contact one server
+            my $server = shift(@Servers_to_contact);
+            my $reply=&Apache::lonnet::metadata_query($query,$customquery,
+                                                      $customshow,[$server]);
+            ($server) = keys(%$reply);
+            $Server_status{$server} = $reply->{$server};
+            &update_contact_status($r,$server);
+        } else {
+            &update_contact_status($r,'none');
+            sleep(1); # wait a sec. to give time for files to be written
+        }
+        while (my ($server,$status) = each(%Server_status)) {
+            last if ($c->aborted());
+            if ($status eq 'con_lost') {
+                delete ($Server_status{$server});
+                next;
+            }
+            $status=~/^([\.\w]+)$/; 
+       	    my $datafile=$r->dir_config('lonDaemons').'/tmp/'.$1;
+            if (-e $datafile && ! -e "$datafile.end") {
+                next;
+            }
+            last if ($c->aborted());
+            if (-e "$datafile.end") {
+                &update_read_status($r,$server);
+                if (-z "$datafile") {
+                    delete($Server_status{$server});
+                    next;
+                }
+                my $fh;
+                if (!($fh=Apache::File->new($datafile))) { 
+                    # Error opening file...
+                    # Tell the user and exit...?
+                    # Should I give up on opening it?
+                    $r->print("Unable to open search results file for ".
+                                  "server $server.  Omitting from search");
+                    next;
+                }
+                # Read in the whole file.
+                while (my $result = <$fh>) {
+                    last if ($c->aborted());
+                    # handle custom fields?  Someday we will!
+                    chomp($result);
+                    next unless $result;
+                    # Parse the result.
+                    my %Fields = &parse_raw_result($result,$server);
+                    $Fields{'hostname'} = $server;
+                    next if (! &copyright_check(\%Fields));
+                    # Store the result in the mysql database
+                    my $result = &Apache::lonmysql::store_row($table,\%Fields);
+                    if (! defined($result)) {
+                        $r->print(&Apache::lonmysql::get_error());
+                    }
+                    # $r->print(&Apache::lonmysql::get_debug());
+                    $hitcountsum ++;
+                    &update_count_status($r,$hitcountsum) if ($hitcountsum % 50 == 0);
+                } # End of foreach (@results)
+                $fh->close();
+                # $server is only deleted if the results file has been 
+                # found and (successfully) opened.  This may be a bad idea.
+                delete($Server_status{$server});
+                # $r->print("Received $new_count more results from ".
+                #              $server.".");
+            }
+            last if ($c->aborted());
+            &update_count_status($r,$hitcountsum);
+        }
+        last if ($c->aborted());
+        # Finished looping through the servers
+    }
+    &update_read_status($r,'none');
+    &Apache::lonmysql::disconnect_from_db();
+    # Let the user know
+    #
+    # We have run out of time or run out of servers to talk to and
+    # results to get.  
+    $r->print("<b>Search Completed.</b>&nbsp;&nbsp;");
+    if ($hitcountsum) {
+        $r->print($hitcountsum." matches were found.");
+    } else {
+        $r->print("There were no successful matches to your query.");
+    }
+    $r->print("</body></html>");
+    return;
+}
+
+######################################################################
+######################################################################
+=pod
+
+=item &prev_next_buttons
+
+=cut
+
+######################################################################
+######################################################################
+sub prev_next_buttons {
+    my ($current_min,$show,$total,$parms) = @_;
+    return '' if ($show eq 'all'); # No links if you get them all at once.
+    my $links;
+    ##
+    ## Prev
+    my $prev_min = $current_min - $show;
+    $prev_min = 0 if $prev_min < 0;
+    if ($prev_min < $current_min) {
+        $links .= qq{
+<a href="/adm/searchcat?$parms&start=$prev_min&show=$show">prev</a>
+};    
+    } else {
+        $links .= 'prev';
+    }
+    ##
+    ## Pages.... Someday.
+    ##
+    $links .= qq{ &nbsp;
+<a href="/adm/searchcat?$parms&start=$current_min&$show=$show">reload</a>
+};
+    ##
+    ## Next
+    my $next_min = $current_min + $show;
+    $next_min = $current_min if ($next_min > $total);
+    if ($next_min != $current_min) {
+        $links .= qq{ &nbsp;
+<a href="/adm/searchcat?$parms&start=$next_min&show=$show">next</a>
+};    
+    } else {
+        $links .= '&nbsp;next';
+    }
+    return $links;
+}
+######################################################################
+######################################################################
+
+=pod
+
+=item &display_results
+
+=cut
+
+######################################################################
+######################################################################
+sub display_results {
+    my ($r,$mode,$importbutton,$closebutton) = @_;
+    $r->print(&search_results_header());
+    ##
+    ## Set viewing function
+    ##
+    my $viewfunction = $Views{$ENV{'form.viewselect'}};
+    if (!defined($viewfunction)) {
+        $r->print("Internal Error - Bad view selected.\n");
+        $r->rflush();
+        return;
+    }
+    ##
+    ## Get the catalog controls setup
+    ##
+    my $action = "/adm/searchcat?phase=results";
+    ##
+    ## Deal with groupsearch
+    ##
+    if ($ENV{'form.catalogmode'} eq 'groupsearch') {
+        if (! tie(%groupsearch_db,'GDBM_File',$diropendb,
+                  &GDBM_WRCREAT(),0640)) {
+            $r->print('Unable to tie hash to db file</body></html>');
+            $r->rflush();
+            return;
+        } 
+    }
+    ##
+    ## Prepare the table for querying
+    ##
+    my $table = $ENV{'form.table'};
+    my $connection_result = &Apache::lonmysql::connect_to_db();
+    if (!defined($connection_result)) {
+        $r->print(&Apache::lonmysql::get_error());
+    }
+    my $table_check = &Apache::lonmysql::check_table($table);
+    if (! defined($table_check)) {
+        $r->print("A MySQL error has occurred.</body></html>");
+        &Apache::lonnet::logthis("lonmysql was unable to determine the status".
+                                 " of table ".$table);
+        return;
+    } elsif (! $table_check) {
+        $r->print("The table of results could not be found.");
+        &Apache::lonnet::logthis("The user requested a table, ".$table.
+                                 ", that could not be found.");
+        return;
+    }
+    ##
+    ## Get the number of results 
+    ##
+    my $total_results = &Apache::lonmysql::number_of_rows($table);
+    if (! defined($total_results)) {
+        $r->print("A MySQL error has occurred.</body></html>");
+        &Apache::lonnet::logthis("lonmysql was unable to determine the number".
+                                 " of rows in table ".$table);
+        &Apache::lonnet::logthis(&Apache::lonmysql::get_error());
+        &Apache::lonnet::logthis(&Apache::lonmysql::get_debug());
+        return;
+    }
+    if ($total_results == 0) {
+        $r->print("There were no results matching your query.\n".
+                  "</form></body></html>");
+        return;
+    }
+    ##
+    ## Determine how many results we need to get
+    ##
+    $ENV{'form.show'} = 20;
+    $ENV{'form.start'} = 0      if (! exists($ENV{'form.start'}));
+    $ENV{'form.show'}      = 'all'  if (! exists($ENV{'form.show'}));
+    my $min = $ENV{'form.start'};
+    my $max;
+    if ($ENV{'form.show'} eq 'all') {
+        $max = $total_results ;
+    } else {
+        $max = $min + $ENV{'form.show'};
+        $max = $total_results if ($max > $total_results);
+    }
+    ##
+    ## Output links (if necessary) for 'prev' and 'next' pages.
+    ##
+    $r->print("<center>Results $min to $max out of $total_results</center>\n");
+    $r->print
+        ('<center>'.
+         &prev_next_buttons($min,$ENV{'form.show'},$total_results,
+                            "table=".$ENV{'form.table'}.
+                            "&phase=results".
+                            "&persistent_db_id=".$ENV{'form.persistent_db_id'})
+         ."</center>\n"
+         );
+    ##
+    ## Get results from MySQL table
+    ##
+    my @Results = &Apache::lonmysql::get_rows($table,
+                                              'id>'.$min.' AND id<='.$max);
+    ##
+    ## Loop through the results and output them.
+    ##
+    foreach my $row (@Results) {
+        my %Fields = %{&parse_row(@$row)};
+        my $output="<p>\n";
+        $output.=&catalogmode_output($Fields{'title'},$Fields{'url'});
+        # Render the result into html
+        $output.= &$viewfunction(%Fields);
+        $output.="</p>\n<hr align='left' width='200' noshade />";
+        # Print them out as they come in.
+        $r->print($output);
+        $r->rflush();
+    }
+    if (@Results < 1) {
+        $r->print("There were no results matching your query");
+    } else {
+        $r->print
+            ('<center>'.
+             &prev_next_buttons($min,$ENV{'form.show'},$total_results,
+                                "table=".$ENV{'form.table'}.
+                                "&phase=results".
+                                "&persistent_db_id=".
+                                $ENV{'form.persistent_db_id'})
+             ."</center>\n"
+             );
+    }
+    $r->print("</body></html>");
+    $r->rflush();
+    untie %groupsearch_db;
+    return;
+}
+
+######################################################################
+######################################################################
+
+=pod
+
+=item &catalogmode_output($title,$url)
+
+Returns html needed for the various catalog modes.  Gets inputs from
+$ENV{'form.catalogmode'}.  Stores data in %groupsearch_db and $fnum 
+(local variable).
+
+=cut
+
+######################################################################
+######################################################################
+{ 
+my $fnum;
+
+sub catalogmode_output {
+    my $output = '';
+    my ($title,$url) = @_;
+    if ($ENV{'form.catalogmode'} eq 'interactive') {
+        $title=~ s/\'/\\'/g; # ' Escape single quotes.
+        if ($ENV{'form.catalogmode'} eq 'interactive') {
+            $output.=<<END 
+<font size='-1'><INPUT TYPE="button" NAME="returnvalues" VALUE="SELECT"
+onClick="javascript:select_data('$title','$url')">
+</font>
+END
+        }
+    }
+    if ($ENV{'form.catalogmode'} eq 'groupsearch') {
+        $fnum+=0;
+        $groupsearch_db{"pre_${fnum}_link"}=$url;
+        $groupsearch_db{"pre_${fnum}_title"}=$title;
+        $output.=<<END;
+<font size='-1'>
+<input type="checkbox" name="returnvalues" value="SELECT"
+onClick="javascript:queue($fnum)" />
+</font>
+END
+        $fnum++;
+    }
+    return $output;
+}
+
+}
+######################################################################
+######################################################################
+
+=pod
+
+=item &parse_row
+
+Parse a row returned from the database.
+
+=cut
+
+######################################################################
+######################################################################
+sub parse_row {
+    my @Row = @_;
+    my %Fields;
+    for (my $i=0;$i<=$#Row;$i++) {
+        $Fields{$DataOrder[$i]}=&Apache::lonnet::unescape($Row[$i]);
+    }
+    $Fields{'language'} = 
+        &Apache::loncommon::languagedescription($Fields{'lang'});
+    $Fields{'copyrighttag'} =
+        &Apache::loncommon::copyrightdescription($Fields{'copyright'});
+    $Fields{'mimetag'} =
+        &Apache::loncommon::filedescription($Fields{'mime'});
+    return \%Fields;
+}
+
+###########################################################
+###########################################################
+
+=pod
+
+=item &parse_raw_result()
+
+Takes a line from the file of results and parse it.  Returns a hash 
+with keys for the following fields:
+'title', 'author', 'subject', 'url', 'keywords', 'version', 'notes', 
+'abstract', 'mime', 'lang', 'owner', 'copyright', 'creationdate', 
+'lastrevisiondate'.
+
+In addition, the following tags are set by calling the appropriate 
+lonnet function: 'language', 'cprtag', 'mimetag'.
+
+The 'title' field is set to "Untitled" if the title field is blank.
+
+'abstract' and 'keywords' are truncated to 200 characters.
+
+=cut
+
+###########################################################
+###########################################################
+sub parse_raw_result {
+    my ($result,$hostname) = @_;
+    # Check for a comma - if it is there then we do not need to unescape the
+    # string.  There seems to be some kind of problem with some items in
+    # the database - the entire string gets sent out unescaped...?
+    unless ($result =~ /,/) {
+        $result = &Apache::lonnet::unescape($result);
+    }
+    my @fields=map {
+        &Apache::lonnet::unescape($_);
+    } (split(/\,/,$result));
+    my ($title,$author,$subject,$url,$keywords,$version,
+        $notes,$abstract,$mime,$lang,
+        $creationdate,$lastrevisiondate,$owner,$copyright)=@fields;
+    my %Fields = 
+        ( title     => &Apache::lonnet::unescape($title),
+          author    => &Apache::lonnet::unescape($author),
+          subject   => &Apache::lonnet::unescape($subject),
+          url       => &Apache::lonnet::unescape($url),
+          keywords  => &Apache::lonnet::unescape($keywords),
+          version   => &Apache::lonnet::unescape($version),
+          notes     => &Apache::lonnet::unescape($notes),
+          abstract  => &Apache::lonnet::unescape($abstract),
+          mime      => &Apache::lonnet::unescape($mime),
+          lang      => &Apache::lonnet::unescape($lang),
+          owner     => &Apache::lonnet::unescape($owner),
+          copyright => &Apache::lonnet::unescape($copyright),
+          creationdate     => &Apache::lonnet::unescape($creationdate),
+          lastrevisiondate => &Apache::lonnet::unescape($lastrevisiondate)
+        );
+    $Fields{'language'} = 
+        &Apache::loncommon::languagedescription($Fields{'lang'});
+    $Fields{'copyrighttag'} =
+        &Apache::loncommon::copyrightdescription($Fields{'copyright'});
+    $Fields{'mimetag'} =
+        &Apache::loncommon::filedescription($Fields{'mime'});
+    if ($Fields{'author'}=~/^(\s*|error)$/) {
+        $Fields{'author'}="Unknown Author";
+    }
+    # Put spaces in the keyword list, if needed.
+    $Fields{'keywords'}=~ s/,([A-z])/, $1/g; 
+    if ($Fields{'title'}=~ /^\s*$/ ) { 
+        $Fields{'title'}='Untitled'; 
+    }
+    unless ($ENV{'user.adv'}) {
+        # What is this anyway?
+        $Fields{'keywords'} = '- not displayed -';
+        $Fields{'notes'}    = '- not displayed -';
+        $Fields{'abstract'} = '- not displayed -';
+        $Fields{'subject'}  = '- not displayed -';
+    }
+    if (length($Fields{'abstract'})>200) {
+        $Fields{'abstract'} = 
+            substr($Fields{'abstract'},0,200).'...';
+    }
+    if (length($Fields{'keywords'})>200) {
+        $Fields{'keywords'} =
+            substr($Fields{'keywords'},0,200).'...';
+    }
+    return %Fields;
+}
+
+###########################################################
+###########################################################
+
+=pod
+
+=item &handle_custom_fields()
+
+=cut
+
+###########################################################
+###########################################################
+sub handle_custom_fields {
+    my @results = @{shift()};
+    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}=$v;
+        }
+    }
+    return ($extrashow,\@customfields,\%customhash);
+}
+
+######################################################################
+######################################################################
+
+=pod
+
+=item &search_results_header
+
+Output the proper html headers and javascript code to deal with different 
+calling modes.
+
+Takes most inputs directly from %ENV, except $mode.  
+
+=over 4
+
+=item $mode is either (at this writing) 'Basic' or 'Advanced'
+
+=back
+
+The following environment variables are checked:
+
+=over 4
+
+=item 'form.catalogmode' 
+
+Checked for 'interactive' and 'groupsearch'.
+
+=item 'form.mode'
+
+Checked for existance & 'edit' mode.
+
+=item 'form.form'
+
+=item 'form.element'
+
+=back
+
+=cut
+
+######################################################################
+######################################################################
+sub search_results_header {
+    my $result = '';
+    # output beginning of search page
+    # conditional output of script functions dependent on the mode in
+    # which the search was invoked
+    if ($ENV{'form.catalogmode'} eq 'interactive'){
+	if (! exists($ENV{'form.mode'}) || $ENV{'form.mode'} ne 'edit') {
+            $result.=<<SCRIPT;
+<script type="text/javascript">
+    function select_data(title,url) {
+	changeTitle(title);
+	changeURL(url);
+	self.close();
+    }
+    function changeTitle(val) {
+	if (opener.inf.document.forms.resinfo.elements.t) {
+	    opener.inf.document.forms.resinfo.elements.t.value=val;
+	}
+    }
+    function changeURL(val) {
+	if (opener.inf.document.forms.resinfo.elements.u) {
+	    opener.inf.document.forms.resinfo.elements.u.value=val;
+	}
+    }
+</script>
+SCRIPT
+        } elsif ($ENV{'form.mode'} eq 'edit') {
+            my $form = $ENV{'form.form'};
+            my $element = $ENV{'form.element'};
+            $result.=<<SCRIPT;
+<script type="text/javascript">
+function select_data(title,url) {
+    changeURL(url);
+    self.close();
+}
+function changeTitle(val) {
+}
+function changeURL(val) {
+    if (window.opener.document) {
+        window.opener.document.forms["$form"].elements["$element"].value=val;
+    } else {
+	var url = 'forms[\"$form\"].elements[\"$element\"].value';
+        alert("Unable to transfer data to "+url);
+    }
+}
+</script>
+SCRIPT
+        }
+    }
+    $result.=<<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
+    $result.=<<END;
+</head>
+END
+    return $result;
+}
+
+######################################################################
+######################################################################
+sub search_status_header {
+    return <<ENDSTATUS;
+<html><head><title>Search Status</title></head>
+<body>
+<h3>Search Status</h3>
+Sending search request to LON-CAPA servers.<br />
+ENDSTATUS
+}
+
+######################################################################
+######################################################################
+sub print_frames_interface {
+    my $r = shift;
+    my $basic_link = "/adm/searchcat?"."&table=".$ENV{'form.table'}.
+        "&persistent_db_id=".$ENV{'form.persistent_db_id'};
+    my $run_search_link = $basic_link."&phase=run_search";
+    my $results_link = $basic_link."&phase=results".
+        "&pause=10"."&start=0"."&show=20";
+    my $result = <<"ENDFRAMES";
+<html>
+<head>
+<title>LON-CAPA Digital Library Search Results</title>
+</head>
+<frameset rows="150,*">
+    <frame name="statusframe"  src="$run_search_link">
+    <frame name="resultsframe" src="$results_link">
+</frameset>
+</html>
+ENDFRAMES
+
+    $r->print($result);
+    return;
 }
 
-# ---------------------------------------------------- see if a field is filled
+######################################################################
+######################################################################
+
+=pod 
+
+=item Metadata Viewing Functions
+
+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, and
+extra custom metadata to show.
+
+=over 4
+
+=item &detailed_citation_view() 
+
+=cut
+
+######################################################################
+######################################################################
+sub detailed_citation_view {
+    my %values = @_;
+    my $result=<<END;
+<h3><a href="http://$ENV{'HTTP_HOST'}$values{'url'}" 
+    target='search_preview'>$values{'title'}</a></h3>
+<p>
+<b>$values{'author'}</b>, <i>$values{'owner'}</i><br />
+
+<b>Subject:       </b> $values{'subject'}<br />
+<b>Keyword(s):    </b> $values{'keywords'}<br />
+<b>Notes:         </b> $values{'notes'}<br />
+<b>MIME Type:     </b> $values{'mimetag'}<br />
+<b>Language:      </b> $values{'language'}<br />
+<b>Copyright/Distribution:</b> $values{'cprtag'}<br />
+</p>
+$values{'extrashow'}
+<p>
+$values{'shortabstract'}
+</p>
+END
+    return $result;
+}
+
+######################################################################
+######################################################################
+
+=pod 
+
+=item &summary_view() 
+
+=cut
+######################################################################
+######################################################################
+sub summary_view {
+    my %values = @_;
+    my $result=<<END;
+<a href="http://$ENV{'HTTP_HOST'}$values{'url'}" 
+   target='search_preview'>$values{'author'}</a><br />
+$values{'title'}<br />
+$values{'owner'} -- $values{'lastrevisiondate'}<br />
+$values{'copyrighttag'}<br />
+$values{'extrashow'}
+</p>
+END
+    return $result;
+}
+
+######################################################################
+######################################################################
+
+=pod 
+
+=item &fielded_format_view() 
+
+=cut
+
+######################################################################
+######################################################################
+sub fielded_format_view {
+    my %values = @_;
+    my $result=<<END;
+<b>URL: </b> <a href="http://$ENV{'HTTP_HOST'}$values{'url'}" 
+              target='search_preview'>$values{'url'}</a>
+<br />
+<b>Title:</b> $values{'title'}<br />
+<b>Author(s):</b> $values{'author'}<br />
+<b>Subject:</b> $values{'subject'}<br />
+<b>Keyword(s):</b> $values{'keywords'}<br />
+<b>Notes:</b> $values{'notes'}<br />
+<b>MIME Type:</b> $values{'mimetag'}<br />
+<b>Language:</b> $values{'language'}<br />
+<b>Creation Date:</b> $values{'creationdate'}<br />
+<b>Last Revision Date:</b> $values{'lastrevisiondate'}<br />
+<b>Publisher/Owner:</b> $values{'owner'}<br />
+<b>Copyright/Distribution:</b> $values{'copyrighttag'}<br />
+<b>Repository Location:</b> $values{'hostname'}<br />
+<b>Abstract:</b> $values{'shortabstract'}<br />
+$values{'extrashow'}
+</p>
+END
+    return $result;
+}
+
+######################################################################
+######################################################################
+
+=pod 
+
+=item &xml_sgml_view() 
+
+=back 
+
+=cut
+
+######################################################################
+######################################################################
+sub xml_sgml_view {
+    my %values = @_;
+    my $result=<<END;
+<pre>
+&lt;LonCapaResource&gt;
+&lt;url&gt;$values{'url'}&lt;/url&gt;
+&lt;title&gt;$values{'title'}&lt;/title&gt;
+&lt;author&gt;$values{'author'}&lt;/author&gt;
+&lt;subject&gt;$values{'subject'}&lt;/subject&gt;
+&lt;keywords&gt;$values{'keywords'}&lt;/keywords&gt;
+&lt;notes&gt;$values{'notes'}&lt;/notes&gt;
+&lt;mimeInfo&gt;
+&lt;mime&gt;$values{'mime'}&lt;/mime&gt;
+&lt;mimetag&gt;$values{'mimetag'}&lt;/mimetag&gt;
+&lt;/mimeInfo&gt;
+&lt;languageInfo&gt;
+&lt;language&gt;$values{'lang'}&lt;/language&gt;
+&lt;languagetag&gt;$values{'language'}&lt;/languagetag&gt;
+&lt;/languageInfo&gt;
+&lt;creationdate&gt;$values{'creationdate'}&lt;/creationdate&gt;
+&lt;lastrevisiondate&gt;$values{'lastrevisiondate'}&lt;/lastrevisiondate&gt;
+&lt;owner&gt;$values{'owner'}&lt;/owner&gt;
+&lt;copyrightInfo&gt;
+&lt;copyright&gt;$values{'copyright'}&lt;/copyright&gt;
+&lt;copyrighttag&gt;$values{'copyrighttag'}&lt;/copyrighttag&gt;
+&lt;/copyrightInfo&gt;
+&lt;repositoryLocation&gt;$values{'hostname'}&lt;/repositoryLocation&gt;
+&lt;shortabstract&gt;$values{'shortabstract'}&lt;/shortabstract&gt;
+&lt;/LonCapaResource&gt;
+</pre>
+$values{'extrashow'}
+END
+    return $result;
+}
+
+######################################################################
+######################################################################
+
+=pod 
+
+=item &filled() see if field is filled.
+
+=cut
+
+######################################################################
+######################################################################
 sub filled {
     my ($field)=@_;
-    if ($field=~/\S/) {
+    if ($field=~/\S/ && $field ne 'any') {
 	return 1;
     }
     else {
@@ -499,42 +2540,20 @@ sub filled {
     }
 }
 
-# --------------------------------------------------- Performing a basic search
-sub basicsearch {
-    my ($r,$envhash)=@_;
-    my %ENV=%{$envhash};
+######################################################################
+######################################################################
 
-    unless (&filled($ENV{'form.basicexp'})) {
-	&output_blank_field_error($r);
-	return OK;
-    }
+=pod 
 
-    my $query='';
-    my $concatarg=join(',"    ",',
-		       ('title', 'author', 'subject', 'notes', 'abstract'));
+=item &output_blank_field_error()
 
-    $query="select * from metadata where concat($concatarg) like '\%$ENV{'form.basicexp'}\%'";
-    my $reply=&Apache::lonnet::metadata_query($query);
-    &output_results('Basic',$r,$envhash,$query,$reply);
-    return OK;
-}
+=cut
 
-# ---------------- Message to output when there are not enough fields filled in
+######################################################################
+######################################################################
 sub output_blank_field_error {
-    my ($r)=@_;
+    my ($r,$closebutton)=@_;
     # make query information persistent to allow for subsequent revision
-    my $persistent='';
-    map {
-	if (/^form\./ && !/submit/) {
-	    my $name=$_;
-	    my $key=$name;
-	    $name=~s/^form\.//;
-	    $persistent.=<<END;
-<INPUT TYPE='hidden' NAME='$name' VALUE='$ENV{$key}'>
-END
-        }
-    } (keys %ENV);
-
     $r->print(<<BEGINNING);
 <html>
 <head>
@@ -543,15 +2562,14 @@ BEGINNING
     $r->print(<<RESULTS);
 </head>
 <body bgcolor="#ffffff">
-<img align=right src=/adm/lonIcons/lonlogos.gif>
+<img align='right' src='/adm/lonIcons/lonlogos.gif' />
 <h1>Search Catalog</h1>
 <form method="post" action="/adm/searchcat">
-$persistent
-<input type='button' value='Revise search request'
-onClick='this.form.submit();'>
-<input type='button' value='CLOSE'
-onClick='self.close();'>
-<hr>
+$hidden_fields
+<a href="/adm/searchcat?persistent_db_id=$ENV{'form.persistent_db_id'}"
+>Revise search request</a>&nbsp;
+$closebutton
+<hr />
 <h3>Helpful Message</h3>
 <p>
 Incorrect search query due to blank entry fields.
@@ -564,188 +2582,83 @@ processed.
 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) {
-
-	my @results;
-
-	my $replyfile='';
-	$reply=~/^([\.\w]+)$/; # must do since 'use strict' checks for tainting
-	$replyfile=$r->dir_config('lonDaemons').'/tmp/'.$1;
-	$reply=~/(.*?)\_/;
-	my $hostname=$1;
-
-	{
-	    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>;
-	}
-
-	foreach my $result (@results) {
-	    my ($title,$author,$subject,$url,$keywords,$version,
-		$notes,$abstract,$mime,$lang,
-		$creationdate,$lastrevisiondate,$owner,$copyright
-		)=map {&Apache::lonnet::unescape($_)} (split(/\,/,$result));
-	    my $shortabstract=$abstract;
-	    $shortabstract=substr($abstract,0,200) if length($abstract)>200;
-	    $compiledresult.=<<END;
-<p>
-END
-            $compiledresult.=<<END if $ENV{'form.catalogmode'} eq 'interactive';
-<font size='-1'><INPUT TYPE="button" NAME="returnvalues" VALUE="SELECT"
-onClick="javascript:select_data('$title','$url')">
-</font>
-<br>
-END
-            $compiledresult.=<<END;
-<b>URL: </b> <A HREF="http://$ENV{'HTTP_HOST'}$url" TARGET='search_preview'>$url</A>
-<br>
-<b>Title:</b> $title<br>
-<b>Author(s):</b> $author<br>
-<b>Subject:</b> $subject<br>
-<b>Keyword(s):</b> $keywords<br>
-<b>Notes:</b> $notes<br>
-<b>Abstract:</b> $shortabstract<br>
-<b>MIME Type:</b> $mimetag{$mime}<br>
-<b>Language:</b> $language{$lang}<br>
-<b>Creation Date:</b> $creationdate<br>
-<b>Last Revision Date:</b> $lastrevisiondate<br>
-<b>Publisher/Owner:</b> $owner<br>
-<b>Copyright/Distribution:</b> $copyright<br>
-<b>Repository Location:</b> $hostname
-</p>
-END
-        }
+######################################################################
+######################################################################
 
-	unless ($compiledresult) {
-	    $compiledresult="There were no results that matched your query";
-	}
+=pod 
 
-	# make query information persistent to allow for subsequent revision
-	my $persistent='';
-	map {
-	    if (/^form\./ && !/submit/) {
-		my $name=$_;
-		my $key=$name;
-		$name=~s/^form\.//;
-		$persistent.=<<END;
-<INPUT TYPE='hidden' NAME='$name' VALUE='$ENV{$key}'>
-END
-            }
-	} (keys %ENV);
+=item &output_date_error()
 
-	$r->print(<<BEGINNING);
+Output a full html page with an error message.
+
+Inputs: 
+
+    $r, the request pointer.
+    $message, the error message for the user.
+    $closebutton, the specialized close button needed for groupsearch.
+
+=cut
+
+######################################################################
+######################################################################
+sub output_date_error {
+    my ($r,$message,$closebutton)=@_;
+    # make query information persistent to allow for subsequent revision
+    $r->print(<<RESULTS);
 <html>
 <head>
 <title>The LearningOnline Network with CAPA</title>
-BEGINNING
-        $r->print(<<SCRIPT) if $ENV{'form.catalogmode'} eq 'interactive';
-<script>
-    function select_data(title,url) {
-	changeTitle(title);
-	changeURL(url);
-    }
-    function changeTitle(val) {
-	if (opener.inf.document.forms.resinfo.elements.t) {
-	    opener.inf.document.forms.resinfo.elements.t.value=val;
-	}
-    }
-    function changeURL(val) {
-	if (opener.inf.document.forms.resinfo.elements.u) {
-	    opener.inf.document.forms.resinfo.elements.u.value=val;
-	}
-    }
-</script>
-SCRIPT
-        $r->print(<<RESULTS);
 </head>
 <body bgcolor="#ffffff">
-<img align=right src=/adm/lonIcons/lonlogos.gif>
+<img align='right' src='/adm/lonIcons/lonlogos.gif' />
 <h1>Search Catalog</h1>
 <form method="post" action="/adm/searchcat">
+$hidden_fields
 <input type='button' value='Revise search request'
-onClick='this.form.submit();'>
-<input type='button' value='CLOSE'
-onClick='self.close();'>
-$persistent
-<hr>
-<h3>Search Query</h3>
-RESULTS
-    if ($mode eq 'Basic') {
-	$r->print(<<RESULTS);
-<p>
-<b>Basic search:</b> $ENV{'form.basicexp'}
-</p>
-RESULTS
-    }
-    elsif ($mode eq 'Advanced') {
-	$r->print(<<RESULTS);
+onClick='this.form.submit();' />
+$closebutton
+<hr />
+<h3>Helpful Message</h3>
 <p>
-<b>Advanced search</b>
-$query
+$message
 </p>
-RESULTS
-    }
-	$r->print(<<RESULTS);
-<h3>Search Results</h3>
-$compiledresult
 </body>
 </html>
 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;
-}
+######################################################################
+######################################################################
 
-# - Recursively parse a reverse notation expression into a SQL query expression
-sub recursive_SQL_query_build {
-    my ($dkey,$pattern)=@_;
-    my @matches=($pattern=~/(\[[^\]|\[]*\])/g);
-    return $pattern unless @matches;
-    foreach my $match (@matches) {
-	$match=~/\[ (\w+)\s(.*) \]/;
-	my ($key,$value)=($1,$2);
-	my $replacement='';
-	if ($key eq 'literal') {
-	    $replacement="($dkey like \"\%$value\%\")";
-	}
-	elsif ($key eq 'and') {
-	    $value=~/(.*[\"|\)]) ([|\(|\^].*)/;
-	    $replacement="($1 AND $2)";
-	}
-	elsif ($key eq 'or') {
-	    $value=~/(.*[\"|\)]) ([|\(|\^].*)/;
-	    $replacement="($1 OR $2)";
+=pod 
+
+=item &start_fresh_session()
+
+Cleans the global %groupsearch_db by removing all fields which begin with
+'pre_' or 'store'.
+
+=cut
+
+######################################################################
+######################################################################
+sub start_fresh_session {
+    delete $groupsearch_db{'mode_catalog'};
+    foreach (keys %groupsearch_db) {
+        if ($_ =~ /^pre_/) {
+            delete $groupsearch_db{$_};
+        }
+        if ($_ =~ /^store/) {
+	    delete $groupsearch_db{$_};
 	}
-	substr($pattern,
-	       index($pattern,$match),
-	       length($match),
-	       $replacement
-	       );
     }
-    &recursive_SQL_query_build($dkey,$pattern);
 }
 
 1;
+
 __END__
+
+=pod
+
+=back 
+
+=cut