# The LearningOnline Network with CAPA
# Search Catalog
#
# $Id: lonsearchcat.pm,v 1.129 2002/06/25 15:08:59 matthew Exp $
#
# Copyright Michigan State University Board of Trustees
#
# 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
=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 GDBM_File;
use Apache::loncommon();
# ---------------------------------------- variables used throughout the module
######################################################################
######################################################################
=pod
=item Global variables
=over 4
=item $closebutton
button that closes the search window
=item $importbutton
button to take the selecte results and go to group sorting
=item %hash
The ubiquitous database hash
=item $diropendb
The full path to the (temporary) search database file. This is set and
used in &handler() and is also used in &output_results().
=back
=cut
######################################################################
######################################################################
# -- dynamically rendered interface components
my $closebutton; # button that closes the search window
my $importbutton; # button to take the selected results and go to group sorting
# -- miscellaneous variables
my %hash; # database hash
my $diropendb = ""; # db file
######################################################################
######################################################################
=pod
=item &handler() - main handler invoked by httpd child
=item Variables
=over 4
=item $hidden
holds 'hidden' html forms
=item $scrout
string that holds portions of the screen output
=back
=cut
######################################################################
######################################################################
sub handler {
my $r = shift;
untie %hash;
$r->content_type('text/html');
$r->send_http_header;
return OK if $r->header_only;
my $domain = $r->dir_config('lonDefDomain');
$diropendb= "/home/httpd/perl/tmp/".&Apache::lonnet::escape($domain).
"\_".&Apache::lonnet::escape($ENV{'user.name'})."_searchcat.db";
&Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
['catalogmode','launch','acts','mode','form','element',
'reqinterface']);
##
## Clear out old values from database
##
if ($ENV{'form.launch'} eq '1') {
if (tie(%hash,'GDBM_File',$diropendb,&GDBM_WRCREAT,0640)) {
&start_fresh_session();
untie %hash;
} else {
$r->print('
Unable to tie hash to db '.
'file');
return OK;
}
}
##
## Produce some output, so people know it is working
##
$r->print("\n");
$r->rflush;
##
## Configure dynamic components of interface
##
my $hidden; # Holds 'hidden' html forms
if ($ENV{'form.catalogmode'} eq 'interactive') {
$hidden="".
"\n";
$closebutton=""."\n";
} elsif ($ENV{'form.catalogmode'} eq 'groupsearch') {
$hidden=<
END
$closebutton=<
END
$importbutton=<
END
}
$hidden .= <
END
##
## What are we doing?
##
if ($ENV{'form.basicsubmit'} eq 'SEARCH') {
# Perform basic search and give results
return &basicsearch($r,\%ENV,$hidden);
} elsif ($ENV{'form.advancedsubmit'} eq 'SEARCH') {
# Perform advanced search and give results
return &advancedsearch($r,\%ENV,$hidden);
} elsif ($ENV{'form.reqinterface'} eq 'advanced') {
# Output the advanced interface
$r->print(&advanced_search_form($closebutton,$hidden));
return OK;
} else {
# Output normal search interface
$r->print(&basic_search_form($closebutton,$hidden));
}
return OK;
}
######################################################################
######################################################################
=pod
=item &basic_search_form()
Returns a scalar which holds html for the basic search form.
=cut
######################################################################
######################################################################
sub basic_search_form{
my ($closebutton,$hidden) = @_;
my $scrout=<<"ENDDOCUMENT";
The LearningOnline Network with CAPA
Search Catalog
ENDDOCUMENT
return $scrout;
}
######################################################################
######################################################################
=pod
=item &advanced_search_form()
Returns a scalar which holds html for the advanced search form.
=cut
######################################################################
######################################################################
sub advanced_search_form{
my ($closebutton,$hidden) = @_;
my $advanced_buttons = <<"END";
$closebutton
END
my $scrout=<<"ENDHEADER";
The LearningOnline Network with CAPA
Advanced Catalog Search
Enter terms or quoted phrases separated by search operators
such as AND, OR, or NOT.
$advanced_buttons
$hidden
\n";
# $ENV{'form.mime'}='any' unless length($ENV{'form.mime'});
# $scrout.=&selectbox('Limit by MIME type','mime',
# $ENV{'form.mime'},
# 'any','Any type',
# \&{Apache::loncommon::filedescriptionex},
# (&Apache::loncommon::fileextensions));
$ENV{'form.language'}='any' unless length($ENV{'form.language'});
$scrout.=&selectbox('Limit by language','language',
$ENV{'form.language'},'any','Any Language',
\&{Apache::loncommon::languagedescription},
(&Apache::loncommon::languageids),
);
# ------------------------------------------------ Compute date selection boxes
$scrout.=<LIMIT BY CREATION DATE RANGE:
between:
CREATIONDATESTART
$scrout.=&dateboxes('creationdatestart',1,1,1976,
$ENV{'form.creationdatestart_month'},
$ENV{'form.creationdatestart_day'},
$ENV{'form.creationdatestart_year'},
);
$scrout.="and:\n";
$scrout.=&dateboxes('creationdateend',12,31,2051,
$ENV{'form.creationdateend_month'},
$ENV{'form.creationdateend_day'},
$ENV{'form.creationdateend_year'},
);
$scrout.="";
$scrout.=<LIMIT BY LAST REVISION DATE RANGE:
between:
LASTREVISIONDATESTART
$scrout.=&dateboxes('lastrevisiondatestart',1,1,1976,
$ENV{'form.lastrevisiondatestart_month'},
$ENV{'form.lastrevisiondatestart_day'},
$ENV{'form.lastrevisiondatestart_year'},
);
$scrout.=<';
$ENV{'form.copyright'}='any' unless length($ENV{'form.copyright'});
$scrout.=&selectbox('Limit by copyright/distribution','copyright',
$ENV{'form.copyright'},
'any','Any copyright/distribution',
\&{Apache::loncommon::copyrightdescription},
(&Apache::loncommon::copyrightids),
);
# ------------------------------------------- Compute customized metadata field
$scrout.=<LIMIT BY SPECIAL METADATA FIELDS:
For resource-specific metadata, enter in an expression in the form of
key=value separated by operators such as AND, OR or NOT. Example: grandmother=75 OR grandfather=85
CUSTOMMETADATA
$scrout.=&simpletextfield('custommetadata',$ENV{'form.custommetadata'});
$scrout.=<SHOW SPECIAL METADATA FIELDS:
Enter in a space-separated list of special metadata fields to show
in a fielded listing for each record result.
CUSTOMSHOW
$scrout.=&simpletextfield('customshow',$ENV{'form.customshow'});
$scrout.=<
ENDDOCUMENT
return $scrout;
}
######################################################################
######################################################################
=pod
=item &make_persistent()
Returns a scalar which holds the current ENV{'form.*'} values in
a 'hidden' html input tag. This allows search interface information
to be somewhat persistent.
=cut
######################################################################
######################################################################
sub make_persistent {
my $persistent='';
foreach (keys %ENV) {
if (/^form\./ && !/submit/) {
my $name=$_;
my $key=$name;
$ENV{$key}=~s/\'//g; # do not mess with html field syntax
$name=~s/^form\.//;
$persistent.=<
END
}
}
return $persistent;
}
######################################################################
######################################################################
=pod
=item HTML form building functions
=over 4
=item &simpletextfield()
Inputs: $name,$value,$size
Returns a text input field with the given name, value, and size.
If size is not specified, a value of 20 is used.
=item &simplecheckbox()
Inputs: $name,$value
Returns a simple check box with the given $name.
If $value eq 'on' the box is checked.
=item &searchphrasefield()
Inputs: $title,$name,$value
Returns html for a title line and an input field for entering search terms.
the instructions "Enter terms or phrases separated by search operators such
as AND, OR, or NOT." are given following the title. The entry field (which
is where the $name and $value are used) is an 80 column simpletextfield.
=item &dateboxes()
Returns html selection form elements for the specification of
the day, month, and year.
=item &selectbox()
Returns a scalar containing an html \n";
$month=~s/(\"$currentmonth\")/$1 SELECTED/ if length($currentmonth);
#
# Year (obviously)
my $year=<
END
my $maxyear = 2051;
for (my $i = 1976; $i<=$maxyear; $i++) {
$year.="
$i
\n";
}
$year.="\n";
$year=~s/(\"$currentyear\")/$1 SELECTED/ if length($currentyear);
return "$month$day$year";
}
sub selectbox {
my ($title,$name,$default,$anyvalue,$anytag,$functionref,@idlist)=@_;
if (! defined($functionref)) { $functionref = sub { $_[0]}; }
my $uctitle=uc($title);
my $selout="\n".'
';
}
######################################################################
######################################################################
=pod
=item &advancedsearch()
Parse advanced search results.
=cut
######################################################################
######################################################################
sub advancedsearch {
my ($r,$envhash,$hidden)=@_;
my %ENV=%{$envhash};
my $fillflag=0;
# Clean up fields for safety
for my $field ('title','author','subject','keywords','url','version',
'creationdatestart_month','creationdatestart_day',
'creationdatestart_year','creationdateend_month',
'creationdateend_day','creationdateend_year',
'lastrevisiondatestart_month','lastrevisiondatestart_day',
'lastrevisiondatestart_year','lastrevisiondateend_month',
'lastrevisiondateend_day','lastrevisiondateend_year',
'notes','abstract','mime','language','owner',
'custommetadata','customshow') {
$ENV{"form.$field"}=~s/[^\w\/\s\(\)\=\-\"\']//g;
}
foreach ('mode','form','element') {
# is this required? Hmmm.
next unless (exists($ENV{"form.$_"}));
$ENV{"form.$_"}=&Apache::lonnet::unescape($ENV{"form.$_"});
$ENV{"form.$_"}=~s/[^\w\/\s\(\)\=\-\"\']//g;
}
# Check to see if enough information was filled in
for my $field ('title','author','subject','keywords','url','version',
'notes','abstract','mime','language','owner',
'custommetadata') {
if (&filled($ENV{"form.$field"})) {
$fillflag++;
}
}
unless ($fillflag) {
&output_blank_field_error($r);
return OK;
}
# Turn the form input into a SQL-based query
my $query='';
my @queries;
# Evaluate logical expression AND/OR/NOT phrase fields.
foreach my $field ('title','author','subject','notes','abstract','url',
'keywords','version','owner','mime') {
if ($ENV{'form.'.$field}) {
push @queries,&build_SQL_query($field,$ENV{'form.'.$field});
}
}
# Evaluate option lists
if ($ENV{'form.language'} and $ENV{'form.language'} ne 'any') {
push @queries,"(language like \"$ENV{'form.language'}\")";
}
# if ($ENV{'form.mime'} and $ENV{'form.mime'} ne 'any') {
# push @queries,"(mime like \"$ENV{'form.mime'}\")";
# }
if ($ENV{'form.copyright'} and $ENV{'form.copyright'} ne 'any') {
push @queries,"(copyright like \"$ENV{'form.copyright'}\")";
}
# Evaluate date windows
my $datequery=&build_date_queries(
$ENV{'form.creationdatestart_month'},
$ENV{'form.creationdatestart_day'},
$ENV{'form.creationdatestart_year'},
$ENV{'form.creationdateend_month'},
$ENV{'form.creationdateend_day'},
$ENV{'form.creationdateend_year'},
$ENV{'form.lastrevisiondatestart_month'},
$ENV{'form.lastrevisiondatestart_day'},
$ENV{'form.lastrevisiondatestart_year'},
$ENV{'form.lastrevisiondateend_month'},
$ENV{'form.lastrevisiondateend_day'},
$ENV{'form.lastrevisiondateend_year'},
);
# Test to see if date windows are legitimate
if ($datequery=~/^Incorrect/) {
&output_date_error($r,$datequery);
return OK;
}
elsif ($datequery) {
push @queries,$datequery;
}
# Process form information for custom metadata querying
my $customquery='';
if ($ENV{'form.custommetadata'}) {
$customquery=&build_custommetadata_query('custommetadata',
$ENV{'form.custommetadata'});
}
my $customshow='';
if ($ENV{'form.customshow'}) {
$customshow=$ENV{'form.customshow'};
$customshow=~s/[^\w\s]//g;
my @fields=split(/\s+/,$customshow);
$customshow=join(" ",@fields);
}
# Send query statements over the network to be processed by either the SQL
# database or a recursive scheme of 'grep'-like actions (for custom
# metadata).
if (@queries) {
$query=join(" AND ",@queries);
$query="select * from metadata where $query";
my $reply; # reply hash reference
unless ($customquery or $customshow) {
$reply=&Apache::lonnet::metadata_query($query);
}
else {
$reply=&Apache::lonnet::metadata_query($query,
$customquery,$customshow);
}
&output_results('Advanced',$r,$envhash,$customquery,$reply,$hidden);
return OK;
} elsif ($customquery) {
my $reply; # reply hash reference
$reply=&Apache::lonnet::metadata_query('',
$customquery,$customshow);
&output_results('Advanced',$r,$envhash,$customquery,$reply,$hidden);
return OK;
}
# should not get to this point
return 'Error. Should not have gone to this point.';
}
######################################################################
######################################################################
=pod
=item &basicsearch()
Parse basic search form.
=cut
######################################################################
######################################################################
sub basicsearch {
my ($r,$envhash,$hidden)=@_;
my %ENV=%{$envhash};
# 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);
return OK;
}
# 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.')',$ENV{'form.'.'basicexp'});
# Get reply (either a hash reference to filehandles or bad connection)
# &Apache::lonnet::logthis("metadata query started:".time);
my $reply=&Apache::lonnet::metadata_query('select * from metadata where '.$query);
# &Apache::lonnet::logthis("metadata query finished:".time);
# Output search results
&output_results('Basic',$r,$envhash,$query,$reply,$hidden);
return OK;
}
######################################################################
######################################################################
=pod
=item &build_SQL_query()
Builds a SQL query string from a logical expression with AND/OR keywords
using Text::Query and &recursive_SQL_query_builder()
=cut
######################################################################
######################################################################
sub build_SQL_query {
my ($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\[^\<] *wordtwo[^\<]*\<\/wordone\>
$matchexp =~ s/(\w+)\\=([\w\\\+]+)?# wordone=wordtwo is changed to
/\\<$1\\>?# \
\[\^\\<\]?# [^\<]
\*$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,$pattern);
}
######################################################################
######################################################################
=pod
=item &build_date_queries()
Builds a SQL logic query to check time/date entries.
Also reports errors (check for /^Incorrect/).
=cut
######################################################################
######################################################################
sub build_date_queries {
my ($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 &output_results()
Format and output results based on a reply list.
There are two windows that this function writes to. The main search
window ("srch") has a listing of the results. A secondary window ("popwin")
gives the status of the network search (time elapsed, number of machines
contacted, etc.)
=cut
######################################################################
######################################################################
sub output_results {
# &Apache::lonnet::logthis("output_results:".time);
my $fnum; # search result counter
my ($mode,$r,$envhash,$query,$replyref,$hidden)=@_;
my %ENV=%{$envhash};
my %rhash=%{$replyref};
my $compiledresult='';
my $timeremain=300; # (seconds)
my $elapsetime=0;
my $resultflag=0;
my $tflag=1;
#
# make query information persistent to allow for subsequent revision
my $persistent=&make_persistent();
# spit out the generic header
$r->print(&search_results_header());
$r->rflush();
# begin showing the cataloged results
$r->print(<
CATALOGCONTROLS
#
# Remind them what they searched for
#
if ($mode eq 'Basic') {
$r->print('
Basic search: '.$ENV{'form.basicexp'}.'
');
} elsif ($mode eq 'Advanced') {
$r->print('
Advanced search '.$query.'
');
}
$r->print('
Search Results
');
$r->rflush();
#
# make the pop-up window for status
#
$r->print(&make_popwin(%rhash));
$r->rflush();
##
## Prepare for the main loop below
##
my $servercount=0;
my $hitcountsum=0;
my $servernum=(keys %rhash);
my $serversleft=$servernum;
##
## Run until we run out of time or we run out of servers
##
while($serversleft && $timeremain) {
##
## %rhash has servers deleted from it as results come in
## (within the foreach loop below).
##
foreach my $rkey (sort keys %rhash) {
# &Apache::lonnet::logthis("Server $rkey:".time);
$servercount++;
$compiledresult='';
my $reply=$rhash{$rkey};
my @results;
if ($reply eq 'con_lost') {
&popwin_imgupdate($r,$rkey,"srvbad.gif");
$serversleft--;
delete $rhash{$rkey};
} else {
# must do since 'use strict' checks for tainting
$reply=~/^([\.\w]+)$/;
my $replyfile=$r->dir_config('lonDaemons').'/tmp/'.$1;
$reply=~/(.*?)\_/;
for (my $counter=0;$counter<2;$counter++) {
if (-e $replyfile && ! -e "$replyfile.end") {
&popwin_imgupdate($r,$rkey,"srvhalf.gif");
&popwin_js($r,'popwin.hc["'.$rkey.'"]='.
'"still transferring..."'.';');
}
# Are we finished transferring data?
if (-e "$replyfile.end") {
$serversleft--;
delete $rhash{$rkey};
if (-s $replyfile) {
&popwin_imgupdate($r,$rkey,"srvgood.gif");
my $fh;
unless ($fh=Apache::File->new($replyfile)){
# Is it really appropriate to die on this error?
$r->print('ERROR: file '.
$replyfile.' cannot be opened');
return OK;
}
@results=<$fh> if $fh;
my $hits =@results;
&popwin_js($r,'popwin.hc["'.$rkey.'"]='.
$hits.';');
$hitcountsum+=$hits;
&popwin_js($r,'popwin.document.forms.popremain.'.
'numhits.value='.$hitcountsum.';');
} else {
&popwin_imgupdate($r,$rkey,"srvempty.gif");
&popwin_js($r,'popwin.hc["'.$rkey.'"]=0;');
}
last;
} # end of if ( -e "$replyfile.end")
last unless $timeremain;
sleep 1; # wait for daemons to write files?
$timeremain--;
$elapsetime++;
&popwin_js($r,"popwin.document.popremain.".
"elapsetime.value=$elapsetime;");
}
&popwin_js($r,'popwin.document.whirly.'.
'src="/adm/lonIcons/lonanimend.gif";');
} # end of if ($reply eq 'con_lost') else statement
my %Fields = undef; # Holds the data to be sent to the various
# *_view routines.
my ($extrashow,$customfields,$customhash) = &handle_custom_fields(\@results);
my @customfields = @$customfields;
my %customhash = %$customhash;
untie %hash if (keys %hash);
#
if (! tie(%hash,'GDBM_File',$diropendb,&GDBM_WRCREAT,0640)) {
$r->print('Unable to tie hash to db '.
'file');
} else {
if ($ENV{'form.launch'} eq '1') {
&start_fresh_session();
}
foreach my $result (@results) {
next if $result=~/^custom\=/;
chomp $result;
next unless $result;
%Fields = &parse_raw_result($result,$rkey);
$Fields{'extrashow'}=$extrashow;
if ($extrashow) {
foreach my $field (@customfields) {
my $value='';
$value = $1 if ($customhash{$Fields{'url'}}=~/\<{$field}[^\>]*\>(.*?)\<\/{$field}[^\>]*\>/s);
$Fields{'extrashow'}=~s/\<\!\-\- $field \-\-\>/ $value/g;
}
}
if ($compiledresult or $servercount!=$servernum) {
$compiledresult.="";
}
$compiledresult.="\n
\n";
if ($ENV{'form.catalogmode'} eq 'interactive') {
my $titleesc=$Fields{'title'};
$titleesc=~s/\'/\\'/; # '
$compiledresult.=<
END
}
if ($ENV{'form.catalogmode'} eq 'groupsearch') {
$fnum+=0;
$hash{"pre_${fnum}_link"}=$Fields{'url'};
$hash{"pre_${fnum}_title"}=$Fields{'title'};
$compiledresult.=<
END
#
#
$fnum++;
}
my $viewselect;
if ($mode eq 'Basic') {
$viewselect=$ENV{'form.basicviewselect'};
}
elsif ($mode eq 'Advanced') {
$viewselect=$ENV{'form.advancedviewselect'};
}
if ($viewselect eq 'Detailed Citation View') {
$compiledresult.=&detailed_citation_view
(%Fields, hostname => $rkey );
}
elsif ($viewselect eq 'Summary View') {
$compiledresult.=&summary_view
(%Fields, hostname => $rkey );
}
elsif ($viewselect eq 'Fielded Format') {
$compiledresult.=&fielded_format_view
(%Fields, hostname => $rkey );
}
elsif ($viewselect eq 'XML/SGML') {
$compiledresult.=&xml_sgml_view
(%Fields, hostname => $rkey );
}
}
untie %hash;
}
if ($compiledresult) {
$resultflag=1;
$r->print($compiledresult);
}
my $percent=sprintf('%3.0f',($servercount/$servernum*100));
} # End of foreach loop over servers remaining
} # End of big loop - while($serversleft && $timeremain)
unless ($resultflag) {
$r->print("\nThere were no results that matched your query\n");
}
# $r->print(''."\n"); $r->rflush();
$r->print("\n