File:
[LON-CAPA] /
loncom /
interface /
lonsearchcat.pm
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1.223:
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Wed May 5 17:29:06 2004 UTC (20 years, 3 months ago) by
matthew
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MAIN
CVS tags:
HEAD
&display_results now uses buttons instead of links for prev/refresh/next,
allows setting of the number of items to display and the output mode
(compact/detailed/xml/fielded/whatever).
Modified &compact_view and &detailed_citation_view.
Modified &prev_next_buttons to produce buttons instead of links.
# The LearningOnline Network with CAPA
# Search Catalog
#
# $Id: lonsearchcat.pm,v 1.223 2004/05/05 17:29:06 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/
#
###############################################################################
###############################################################################
=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 separate window.
=head1 Internals
=over 4
=cut
###############################################################################
###############################################################################
package Apache::lonsearchcat;
use strict;
use Apache::Constants qw(:common :http);
use Apache::lonnet();
use Apache::File();
use CGI qw(:standard);
use Text::Query;
use GDBM_File;
use Apache::loncommon();
use Apache::lonmysql();
use Apache::lonmeta;
use Apache::lonhtmlcommon;
use Apache::lonlocal;
use LONCAPA::lonmetadata();
use HTML::Entities();
######################################################################
######################################################################
##
## Global variables
##
######################################################################
######################################################################
my %groupsearch_db; # Database hash used to save values for the
# groupsearch RAT interface.
my %persistent_db; # gdbm hash which holds data which is supposed to
# persist across calls to lonsearchcat.pm
# The different view modes and associated functions
my %Views = ("detailed" => \&detailed_citation_view,
"summary" => \&summary_view,
"fielded" => \&fielded_format_view,
"xml" => \&xml_sgml_view,
"compact" => \&compact_view);
######################################################################
######################################################################
sub handler {
my $r = shift;
# &set_defaults();
#
# set form defaults
#
my $hidden_fields;# Hold all the hidden fields used to keep track
# of the search system state
my $importbutton; # button to take the selected results and go to group
# sorting
my $diropendb; # The full path to the (temporary) search database file.
# This is set and used in &handler() and is also used in
# &output_results().
my $bodytag; # LON-CAPA standard body tag, gotten from
# &Apache::lonnet::bodytag.
# No title, no table, just a <body> tag.
my $loaderror=&Apache::lonnet::overloaderror($r);
if ($loaderror) { return $loaderror; }
#
my $closebutton; # button that closes the search window
# This button is different for the RAT compared to
# normal invocation.
#
&Apache::loncommon::content_type($r,'text/html');
$r->send_http_header;
return OK if $r->header_only;
##
## Prevent caching of the search interface window. Hopefully this means
## we will get the launch=1 passed in a little more.
&Apache::loncommon::no_cache($r);
##
## Pick up form fields passed in the links.
##
&Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
['catalogmode','launch','acts','mode','form','element','pause',
'phase','persistent_db_id','table','start','show',
'cleargroupsort','titleelement']);
##
## The following is a trick - we wait a few seconds if asked to so
## the daemon running the search can get ahead of the daemon
## printing the results. We only need (theoretically) to do
## this once, so the pause indicator is deleted
##
if (exists($ENV{'form.pause'})) {
sleep(1);
delete($ENV{'form.pause'});
}
##
## Initialize global variables
##
my $domain = $r->dir_config('lonDefDomain');
$diropendb= "/home/httpd/perl/tmp/".
"$ENV{'user.domain'}_$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;
}
$bodytag=&Apache::loncommon::bodytag(undef,undef,undef,1);
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';
##
&Apache::lonhtmlcommon::clear_breadcrumbs();
if (exists($ENV{'request.course.id'}) && $ENV{'request.course.id'} ne '') {
&Apache::lonhtmlcommon::add_breadcrumb
({href=>'/adm/searchcat?'.
'catalogmode='.$ENV{'form.catalogmode'}.
'&launch='.$ENV{'form.launch'}.
'&mode='.$ENV{'form.mode'},
text=>"Course and Catalog Search",
bug=>'Searching',});
} else {
&Apache::lonhtmlcommon::add_breadcrumb
({href=>'/adm/searchcat?'.
'catalogmode='.$ENV{'form.catalogmode'}.
'&launch='.$ENV{'form.launch'}.
'&mode='.$ENV{'form.mode'},
text=>"Catalog Search",
bug=>'Searching',});
}
#
if ($ENV{'form.phase'} !~ m/(basic|adv|course)_search/) {
if (! &get_persistent_form_data($persistent_db_file)) {
if ($ENV{'form.phase'} =~ /(run_search|results)/) {
&Apache::lonnet::logthis('lonsearchcat:'.
'Unable to recover data from '.
$persistent_db_file);
$r->print(<<END);
<html>
<head><title>LON-CAPA Search Error</title></head>
$bodytag
We were unable to retrieve data describing your search. This is a serious
error and has been logged. Please alert your LON-CAPA administrator.
</body>
</html>
END
return OK;
}
}
} else {
&clean_up_environment();
}
##
## Clear out old values from groupsearch database
##
untie %groupsearch_db if (tied(%groupsearch_db));
if (($ENV{'form.cleargroupsort'} eq '1') ||
(($ENV{'form.launch'} eq '1') &&
($ENV{'form.catalogmode'} eq 'groupsearch'))) {
if (tie(%groupsearch_db,'GDBM_File',$diropendb,&GDBM_WRCREAT(),0640)) {
&start_fresh_session();
untie %groupsearch_db;
delete($ENV{'form.cleargroupsort'});
} else {
# This is a stupid error to give to the user.
# It really tells them nothing.
$r->print('<html><head></head>'.$bodytag.
'Unable to tie hash to db file</body></html>');
return OK;
}
}
##
## Configure hidden fields
##
$hidden_fields = '<input type="hidden" name="persistent_db_id" value="'.
$ENV{'form.persistent_db_id'}.'" />'."\n";
if (exists($ENV{'form.catalogmode'})) {
$hidden_fields .= &hidden_field('catalogmode');
}
if (exists($ENV{'form.form'})) {
$hidden_fields .= &hidden_field('form');
}
if (exists($ENV{'form.element'})) {
$hidden_fields .= &hidden_field('element');
}
if (exists($ENV{'form.titleelement'})) {
$hidden_fields .= &hidden_field('titleelement');
}
if (exists($ENV{'form.mode'})) {
$hidden_fields .= &hidden_field('mode');
}
##
## Configure dynamic components of interface
##
if ($ENV{'form.catalogmode'} eq 'interactive') {
$closebutton="<input type='button' name='close' value='CLOSE' ";
if ($ENV{'form.phase'} =~ /(results|run_search)/) {
$closebutton .="onClick='parent.close()'";
} else {
$closebutton .="onClick='self.close()'";
}
$closebutton .=">\n";
} elsif ($ENV{'form.catalogmode'} eq 'groupsearch') {
$closebutton="<input type='button' name='close' value='CLOSE' ";
if ($ENV{'form.phase'} =~ /(results|run_search)/) {
$closebutton .="onClick='parent.close()'";
} else {
$closebutton .="onClick='self.close()'";
}
$closebutton .= ">";
$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'})) {
if (($ENV{'form.catalogmode'} eq 'groupsearch') ||
($ENV{'form.catalogmode'} eq 'interactive')) {
$ENV{'form.viewselect'} ="Compact View";
} else {
$ENV{'form.viewselect'} ="Detailed Citation View";
}
}
$ENV{'form.phase'} = 'disp_basic' if (! exists($ENV{'form.phase'}));
$ENV{'form.show'} = 20 if (! exists($ENV{'form.show'}));
#
$ENV{'form.searchmode'} = 'basic' if (! exists($ENV{'form.searchmode'}));
if ($ENV{'form.phase'} eq 'adv_search' ||
$ENV{'form.phase'} eq 'disp_adv') {
$ENV{'form.searchmode'} = 'advanced';
} elsif ($ENV{'form.phase'} eq 'course_search') {
$ENV{'form.searchmode'} = 'course_search';
}
#
if ($ENV{'form.searchmode'} eq 'advanced') {
&Apache::lonhtmlcommon::add_breadcrumb
({href=>'/adm/searchcat?phase=disp_adv&'.
'catalogmode='.$ENV{'form.catalogmode'}.
'&launch='.$ENV{'form.launch'}.
'&mode='.$ENV{'form.mode'},
text=>"Advanced Search",
bug=>'Searching',});
} elsif ($ENV{'form.searchmode'} eq 'course search') {
&Apache::lonhtmlcommon::add_breadcrumb
({href=>'/adm/searchcat?phase=disp_adv&'.
'catalogmode='.$ENV{'form.catalogmode'}.
'&launch='.$ENV{'form.launch'}.
'&mode='.$ENV{'form.mode'},
text=>"Course Search",
bug=>'Searching',});
}
##
## Switch on the phase
##
if ($ENV{'form.phase'} eq 'disp_basic') {
&print_basic_search_form($r,$closebutton,$hidden_fields);
} elsif ($ENV{'form.phase'} eq 'disp_adv') {
&print_advanced_search_form($r,$closebutton,$hidden_fields);
} elsif ($ENV{'form.phase'} eq 'results') {
&display_results($r,$importbutton,$closebutton,$diropendb);
} elsif ($ENV{'form.phase'} =~ /^(sort|run_search)$/) {
my ($query,$customquery,$customshow,$libraries,$pretty_string) =
&get_persistent_data($persistent_db_file,
['query','customquery','customshow',
'libraries','pretty_string']);
if ($ENV{'form.phase'} eq 'sort') {
&print_sort_form($r,$pretty_string);
} elsif ($ENV{'form.phase'} eq 'run_search') {
&run_search($r,$query,$customquery,$customshow,
$libraries,$pretty_string);
}
} elsif ($ENV{'form.phase'} eq 'course_search') {
&course_search($r);
} elsif(($ENV{'form.phase'} eq 'basic_search') ||
($ENV{'form.phase'} eq 'adv_search')) {
# Set up table
if (! defined(&create_results_table())) {
my $errorstring=&Apache::lonmysql::get_error();
&Apache::lonnet::logthis('lonsearchcat.pm: Unable to create '.
'needed table. lonmysql error:'.
$errorstring);
$r->print(<<END);
<html><head><title>Search Error</title></head>
$bodytag
Unable to create table in which to store search results.
The search has been aborted.
</body>
</html>
END
return OK;
}
delete($ENV{'form.launch'});
if (! &make_form_data_persistent($r,$persistent_db_file)) {
$r->print(<<END);
<html><head><title>Search Error</title></head>
$bodytag
Unable to properly store search information. The search has been aborted.
</body>
</html>
END
return OK;
}
#
# We are running a search
my ($query,$customquery,$customshow,$libraries) =
(undef,undef,undef,undef);
my $pretty_string;
if ($ENV{'form.phase'} eq 'basic_search') {
($query,$pretty_string,$libraries) =
&parse_basic_search($r,$closebutton,$hidden_fields);
} else { # Advanced search
($query,$customquery,$customshow,$libraries,$pretty_string)
= &parse_advanced_search($r,$closebutton,$hidden_fields);
return OK if (! defined($query));
}
&make_persistent({ 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;
}
#
# The mechanism used to store values away and retrieve them does not
# handle the case of missing environment variables being significant.
#
# This routine sets non existant checkbox form elements to ''.
#
sub clean_up_environment {
if ($ENV{'form.phase'} eq 'basic_search') {
if (! exists($ENV{'form.related'})) {
$ENV{'form.related'} = '';
}
if (! exists($ENV{'form.domains'})) {
$ENV{'form.domains'} = '';
}
} elsif ($ENV{'form.phase'} eq 'adv_search') {
foreach my $field ('title','keywords','notes',
'abstract','standards','mime') {
if (! exists($ENV{'form.'.$field.'_related'})) {
$ENV{'form.'.$field.'_related'} = '';
}
}
} elsif ($ENV{'form.phase'} eq 'course_search') {
if (! exists($ENV{'form.crsrelated'})) {
$ENV{'form.crsrelated'} = '';
}
}
}
sub hidden_field {
my ($name,$value) = @_;
if (! defined($value)) {
$value = $ENV{'form.'.$name};
}
return '<input type="hidden" name="'.$name.'" value="'.$value.'" />'.$/;
}
######################################################################
######################################################################
##
## Course Search
##
######################################################################
######################################################################
{ # Scope the course search to avoid global variables
#
# Variables For course search
my %alreadyseen;
my %hash;
my $totalfound;
sub course_search {
my $r=shift;
my $bodytag=&Apache::loncommon::bodytag('Course Search');
my $pretty_search_string = '<b>'.$ENV{'form.courseexp'}.'</b>';
my $search_string = $ENV{'form.courseexp'};
my @New_Words;
if ($ENV{'form.crsrelated'}) {
($search_string,@New_Words) = &related_version($ENV{'form.courseexp'});
if (@New_Words) {
$pretty_search_string .= ' '.&mt("with related words").": <b>@New_Words</b>.";
} else {
$pretty_search_string .= ' '.&mt('with no related words').".";
}
}
my $fulltext=$ENV{'form.crsfulltext'};
my @allwords=($search_string,@New_Words);
$totalfound=0;
$r->print('<html><head><title>LON-CAPA Course Search</title></head>'.
$bodytag.'<hr /><center><font size="+2" face="arial">'.$pretty_search_string.'</font></center><hr />');
$r->rflush();
# ======================================================= Go through the course
undef %alreadyseen;
%alreadyseen=();
my $c=$r->connection;
if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.".db",
&GDBM_READER(),0640)) {
foreach (keys %hash) {
if ($c->aborted()) { last; }
if (($_=~/^src\_(.+)$/) && (!$alreadyseen{$hash{$_}})) {
&checkonthis($r,$hash{$_},0,$hash{'title_'.$1},$fulltext,
@allwords);
}
}
untie(%hash);
}
unless ($totalfound) {
$r->print('<p>'.&mt('No resources found').'.</p>');
}
# =================================================== Done going through course
$r->print('</body></html>');
}
# =============================== This pulls up a resource and its dependencies
sub checkonthis {
my ($r,$url,$level,$title,$fulltext,@allwords)=@_;
$alreadyseen{$url}=1;
$r->rflush();
my $result=&Apache::lonnet::metadata($url,'title').' '.
&Apache::lonnet::metadata($url,'subject').' '.
&Apache::lonnet::metadata($url,'abstract').' '.
&Apache::lonnet::metadata($url,'keywords');
if (($url) && ($fulltext)) {
$result.=&Apache::lonnet::ssi_body($url);
}
$result=~s/\s+/ /gs;
my $applies=0;
foreach (@allwords) {
if ($_=~/\w/) {
if ($result=~/$_/si) {
$applies++;
}
}
}
# Does this resource apply?
if ($applies) {
$r->print('<br />');
for (my $i=0;$i<=$level*5;$i++) {
$r->print(' ');
}
$r->print('<a href="'.$url.'" target="cat">'.
($title?$title:$url).'</a><br />');
$totalfound++;
} elsif ($fulltext) {
$r->print(' .');
}
$r->rflush();
# Check also the dependencies of this one
my $dependencies=
&Apache::lonnet::metadata($url,'dependencies');
foreach (split(/\,/,$dependencies)) {
if (($_=~/^\/res\//) && (!$alreadyseen{$_})) {
&checkonthis($r,$_,$level+1,'',$fulltext,@allwords);
}
}
}
sub untiehash {
if (tied(%hash)) {
untie(%hash);
}
}
} # End of course search scoping
sub search_html_header {
my $Str = <<ENDHEADER;
<html>
<head>
<title>The LearningOnline Network with CAPA</title>
</head>
ENDHEADER
return $Str;
}
######################################################################
######################################################################
=pod
=item &print_basic_search_form()
Prints the form for the basic search. Sorry the name is so cryptic.
=cut
######################################################################
######################################################################
sub print_basic_search_form {
my ($r,$closebutton,$hidden_fields) = @_;
my $bodytag=&Apache::loncommon::bodytag('Search').
&Apache::lonhtmlcommon::breadcrumbs(undef,'Searching','Searching',
undef,undef,! $ENV{'form.launch'});
my $scrout = &search_html_header().$bodytag;
if (&Apache::lonnet::allowed('bre',$ENV{'request.role.domain'})) {
# Define interface components
my $userelatedwords=
&mt('[_1] use related words',
&Apache::lonhtmlcommon::checkbox
('related',$ENV{'form.related'},'related'));
my $onlysearchdomain=
&mt('[_1] only search domain [_2]',
&Apache::lonhtmlcommon::checkbox('domains',
$ENV{'form.domains'},
$r->dir_config('lonDefDomain')
),
$r->dir_config('lonDefDomain')
);
my $adv_search_link =
'<a href="/adm/searchcat?'.
'phase=disp_adv&'.
'catalogmode='.$ENV{'form.catalogmode'}.
'&launch='.$ENV{'form.launch'}.
'&mode='.$ENV{'form.mode'}.
'">'.&mt('Advanced Search').'</a>';
#
$scrout.='<form name="loncapa_search" method="post" '.
'action="/adm/searchcat">'.
'<input type="hidden" name="phase" value="basic_search" />'.
$hidden_fields;
#
$scrout .= '<center>'.$/;
if ($ENV{'request.course.id'}) {
$scrout .= '<h1>'.&mt('LON-CAPA Catalog Search').'</h1>';
} else {
# No need to tell them they are searching
$scrout.= ('<br />'x2);
}
$scrout.='<table>'.
'<tr><td align="center" valign="top">'.
&Apache::lonhtmlcommon::textbox('basicexp',
$ENV{'form.basicexp'},50).'<br />'.
'<font size="-1">'.&searchhelp().'</font>'.'</td>'.
'<td><font size="-1">'.
'<nobr>'.(' 'x3).$adv_search_link.'</nobr>'.'<br />'.
'<nobr>'.(' 'x1).$userelatedwords.'</nobr>'.'<br />'.
'<nobr>'.(' 'x1).$onlysearchdomain.'</nobr>'.'<br />'.
'</font></td>'.
'</tr>'.$/;
#
# $scrout .= '<tr><td align="center">'.
# '<font size="-1">'.
# $userelatedwords.(' 'x3).
# $onlysearchdomain.(' 'x2).$adv_search_link.
# '</font>'.
# '</td></tr>'.$/;
$scrout .= '<tr><td align="center" colspan="2">'.
'<font size="-1">'.
'<input type="submit" name="basicsubmit" '.
'value="'.&mt('Search').'" />'.
(' 'x2).$closebutton.(' 'x2).
&viewoptions().
'</font>'.
'</td></tr>'.$/;
$scrout .= '</table>'.$/.'</center>'.'</form>';
}
if ($ENV{'request.course.id'}) {
my %lt=&Apache::lonlocal::texthash('srch' => 'Search',
'header' => 'Course Search',
'note' => 'Enter terms or phrases, then press "Search" below',
'use' => 'use related words',
'full' =>'fulltext search (time consuming)'
);
$scrout.=(<<ENDCOURSESEARCH);
<form name="loncapa_search" method="post" action="/adm/searchcat">
<center>
<hr />
<h1>$lt{'header'}</h1>
<input type="hidden" name="phase" value="course_search" />
$hidden_fields
<p>
$lt{'note'}.
</p>
<p>
<table>
<tr><td>
ENDCOURSESEARCH
$scrout.=' '.
&Apache::lonhtmlcommon::textbox('courseexp',
$ENV{'form.courseexp'},40);
my $crscheckbox =
&Apache::lonhtmlcommon::checkbox('crsfulltext',
$ENV{'form.crsfulltext'});
my $relcheckbox =
&Apache::lonhtmlcommon::checkbox('crsrelated',
$ENV{'form.crsrelated'});
$scrout.=(<<ENDENDCOURSE);
</td></tr>
<tr><td>$relcheckbox $lt{'use'}</td><td></td></tr>
<tr><td>$crscheckbox $lt{'full'}</td><td></td></tr>
</table><p>
<input type="submit" name="coursesubmit" value='$lt{'srch'}' />
</p>
</center>
</form>
ENDENDCOURSE
}
$scrout.=(<<ENDDOCUMENT);
</body>
</html>
ENDDOCUMENT
$r->print($scrout);
return;
}
######################################################################
######################################################################
=pod
=item &advanced_search_form()
Prints the advanced search form.
=cut
######################################################################
######################################################################
sub print_advanced_search_form{
my ($r,$closebutton,$hidden_fields) = @_;
my $bodytag=&Apache::loncommon::bodytag('Advanced Catalog Search').
&Apache::lonhtmlcommon::breadcrumbs(undef,'Searching',
'Searching',
undef,undef,
! $ENV{'form.launch'});
my %lt=&Apache::lonlocal::texthash('srch' => 'Search',
'reset' => 'Reset',
'help' => 'Help');
my $advanced_buttons=<<"END";
<input type="submit" name="advancedsubmit" value='$lt{"srch"}' />
<input type="reset" name="reset" value='$lt{"reset"}' />
$closebutton
END
my $scrout=&search_html_header();
$scrout .= <<"ENDHEADER";
$bodytag
<form method="post" action="/adm/searchcat" name="advsearch">
<p>
$advanced_buttons
ENDHEADER
$scrout.=(' 'x2).&viewoptions().'</p>'.$hidden_fields.
'<input type="hidden" name="phase" value="adv_search" />';
my %fields=&Apache::lonmeta::fieldnames();
#
$scrout .= '<h3>'.&mt('Standard Metadata').'</h3>';
$scrout .= "<table>\n";
$scrout .= '<tr><td> </td><td colspan="2"><font size="-1">'.
(' 'x2).&searchhelp()."</font></td></tr>\n";
my %related_word_search =
('title' => 1,
'author' => 0,
'owner' => 0,
'authorspace' => 0,
'modifyinguser'=> 0,
'keywords' => 1,
'notes' => 1,
'abstract' => 1,
'standards'=> 1,
'mime' => 1,
);
#
foreach my $field ('title','author','owner','authorspace','modifyinguser',
'keywords','notes','abstract','standards','mime') {
$scrout.='<tr><td align="right">'.&titlefield($fields{$field}).'</td><td>'.
&Apache::lonmeta::prettyinput($field,
$ENV{'form.'.$field},
$field,
'advsearch',
$related_word_search{$field},
'</td><td align="left">',
$ENV{'form.'.$field.'_related'},
50);
if ($related_word_search{$field}) {
$scrout .= 'related words';
} else {
$scrout .= '</td><td> ';
}
$scrout .= '</td></tr>'.$/;
}
foreach my $field ('lowestgradelevel','highestgradelevel') {
$scrout.='<tr>'.
'<td align="right">'.&titlefield($fields{$field}).'</td>'.
'<td colspan="2">'.
&Apache::lonmeta::prettyinput($field,
$ENV{'form.'.$field},
$field,
'advsearch',
0).
'</td></tr>'.$/;
}
$scrout.='<tr><td align="right">'.
&titlefield(&mt('MIME Type Category')).'</td><td colspan="2">'.
&Apache::loncommon::filecategoryselect('category',
$ENV{'form.category'}).
'</td></tr>'.$/;
$scrout.='<tr><td align="right" valign="top">'.
&titlefield(&mt('Domains')).'</td><td colspan="2">'.
&Apache::loncommon::domain_select('domains',
$ENV{'form.domains'},1).
'</td></tr>'.$/;
#
# Misc metadata
$scrout.='<tr><td align="right" valign="top">'.
&titlefield(&mt('Copyright/Distribution')).'</td><td colspan="2">'.
&Apache::lonmeta::selectbox('copyright',
'',,
\&Apache::loncommon::copyrightdescription,
( undef,
&Apache::loncommon::copyrightids)
).'</td></tr>'.$/;
$scrout.='<tr><td align="right" valign="top">'.
&titlefield(&mt('Language')).'</td><td colspan="2">'.
&Apache::lonmeta::selectbox('language',
'notset',,
\&Apache::loncommon::languagedescription,
('any',&Apache::loncommon::languageids)
).'</td></tr>';
$scrout .= "</table>\n";
#
# Dynamic metadata
$scrout .= '<h3>'.&mt('Problem Statistics').'</h3>';
$scrout .= "<table>\n";
$scrout .= '<tr><td> </td><td align="center">'.&mt('Minimum').'</td>'.
'<td align="center">'.&mt('Maximum').'</td></tr>'."\n";
foreach my $statistic
({ name=>'count',
description=>'Network-wide number of accesses (hits)',},
{ name=>'stdno',
description=>
'Total number of students who have worked on this problem',},
{ name => 'avetries',
description=>'Average number of tries till solved',},
{ name => 'difficulty',
description=>'Degree of difficulty',},
{ name => 'disc',
description=>'Degree of discrimination'}) {
$scrout .= '<tr><td align="right">'.
&titlefield(&mt($statistic->{'description'})).
'</td><td align="center">'.
'<input type="text" name="'.$statistic->{'name'}.'_min" '.
'value="" size="6" />'.
'</td><td align="center">'.
'<input type="text" name="'.$statistic->{'name'}.'_max" '.
'value="" size="6" />'.
'</td></tr>'.$/;
}
$scrout .= "</table>\n";
$scrout .= '<h3>'.&mt('Evaluation Data').'</h3>';
$scrout .= "<table>\n";
$scrout .= '<tr><td> </td><td align="center">'.&mt('Minimum').'</td>'.
'<td align="center">'.&mt('Maximum').'</td></tr>'."\n";
foreach my $evaluation
( { name => 'clear',
description => 'Material presented in clear way'},
{ name =>'depth',
description => 'Material covered with sufficient depth'},
{ name => 'helpful',
description => 'Material is helpful'},
{ name => 'correct',
description => 'Material appears to be correct'},
{ name => 'technical',
description => 'Resource is technically correct'}){
$scrout .= '<tr><td align="right">'.
&titlefield(&mt($evaluation->{'description'})).
'</td><td align="center">'.
'<input type="text" name="'.$evaluation->{'name'}.'_min" '.
'value="" size="6" />'.
'</td><td align="center">'.
'<input type="text" name="'.$evaluation->{'name'}.'_max" '.
'value="" size="6" />'.
'</td></tr>'.$/;
}
$scrout .= "</table>\n";
#
# Creation/Modification date limits
$scrout .= '<h3>'.&mt('Creation and Modification dates').'</h3>';
$scrout .= "\n<table>\n";
my $cafter =
&Apache::lonhtmlcommon::date_setter('advsearch', # formname
'creationdate1', # fieldname
0, # current value
'', # special
1, # includeempty
'', # state
1, # no_hh_mm_ss
);
my $cbefore =
&Apache::lonhtmlcommon::date_setter('advsearch', # formname
'creationdate2', # fieldname
0, # current value
'', # special
1, # includeempty
'', # state
1, # no_hh_mm_ss
);
$scrout .= &mt('<tr><td align="right">Created between</td>'.
'<td>[_1]</td></tr>'.
'<tr><td align="right">and </td>'.
'<td>[_2]</td></tr>',$cafter,$cbefore);
my $lafter =
&Apache::lonhtmlcommon::date_setter('advsearch',
'revisiondate1',
0, # current value
'', # special
1, # includeempty
'', # state
1, # no_hh_mm_ss
);
my $lbefore =
&Apache::lonhtmlcommon::date_setter('advsearch',
'revisiondate2',
0, # current value
'', # special
1, # includeempty
'', # state
1, # no_hh_mm_ss
);
$scrout .= &mt('<tr><td align="right">Last modified between </td>'.
'<td>[_1]</td></tr>'.
'<tr><td align="right">and</td>'.
'<td>[_2]</td></tr>',$lafter,$lbefore);
$scrout.="</table>\n";
$scrout.=<<ENDDOCUMENT;
$advanced_buttons
</form>
</body>
</html>
ENDDOCUMENT
$r->print($scrout);
return;
}
######################################################################
######################################################################
=pod
=item &titlefield()
Inputs: title text
Outputs: titletext with font wrapper
=cut
######################################################################
######################################################################
sub titlefield {
my $title=shift;
return $title;
}
######################################################################
######################################################################
=pod
=item viewoptiontext()
Inputs: codename for view option
Outputs: displayed text
=cut
######################################################################
######################################################################
sub viewoptiontext {
my $code=shift;
my %desc=&Apache::lonlocal::texthash
('detailed' => "Detailed Citation View",
'xml' => 'XML/SGML',
'compact' => 'Compact View',
'fielded' => 'Fielded Format',
'summary' => 'Summary View');
return $desc{$code};
}
######################################################################
######################################################################
=pod
=item viewoptions()
Inputs: none
Outputs: text for box with view options
=cut
######################################################################
######################################################################
sub viewoptions {
my $scrout;
if (! defined($ENV{'form.viewselect'})) {
$ENV{'form.viewselect'}='detailed';
}
$scrout.=&Apache::lonmeta::selectbox('viewselect',
$ENV{'form.viewselect'},
\&viewoptiontext,
sort(keys(%Views)));
$scrout.= ' ';
my $countselect = &Apache::lonmeta::selectbox('show',
$ENV{'form.show'},
undef,
(10,20,50,100,1000,10000));
$scrout .= (' 'x2).&mt('[_1] Records per Page',$countselect).
'</nobr>'.$/;
return $scrout;
}
######################################################################
######################################################################
=pod
=item searchhelp()
Inputs: none
Outputs: return little blurb on how to enter searches
=cut
######################################################################
######################################################################
sub searchhelp {
return &mt('Enter terms or phrases separated by AND, OR, or NOT');
}
######################################################################
######################################################################
=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 $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.domains'=>1);
#
# Loop through the keys, looking for 'form.'
foreach my $name (keys(%persistent_db)) {
next if ($name !~ /^form./);
# Kludgification begins!
if ($name eq 'form.domains' &&
$ENV{'form.searchmode'} eq 'basic' &&
$ENV{'form.phase'} ne 'disp_basic') {
next;
}
# End kludge (hopefully)
next if (exists($ENV{$name}));
my @values = map {
&Apache::lonnet::unescape($_);
} split(',',$persistent_db{$name});
next if (@values <1);
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 separated string.
=cut
######################################################################
######################################################################
sub make_persistent {
my %save = %{shift()};
my $filename = shift;
return undef if (! tie(%persistent_db,'GDBM_File',
$filename,&GDBM_WRCREAT(),0640));
foreach my $name (keys(%save)) {
my @values = (ref($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 separated 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(\%save,$filename);
}
######################################################################
######################################################################
=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,$closebutton,$hidden_fields)=@_;
my @BasicFields = ('title','author','subject','keywords','url','version',
'notes','abstract','extension','owner',
# 'custommetadata','customshow',
'modifyinguser','standards','mime');
my @StatsFields = &statfields();
my @EvalFields = &evalfields();
my $fillflag=0;
my $pretty_search_string = "<br />\n";
# Clean up fields for safety
for my $field (@BasicFields,
'creationdatestart_month','creationdatestart_day',
'creationdatestart_year','creationdateend_month',
'creationdateend_day','creationdateend_year',
'lastrevisiondatestart_month','lastrevisiondatestart_day',
'lastrevisiondatestart_year','lastrevisiondateend_month',
'lastrevisiondateend_day','lastrevisiondateend_year') {
$ENV{'form.'.$field}=~s/[^\w\/\s\(\)\=\-\"\']//g;
$ENV{'form.'.$field}=~s/(not\s*$|^\s*(and|or)|)//gi;
}
foreach ('mode','form','element') {
# is this required? Hmmm.
next if (! exists($ENV{'form.'.$_}));
$ENV{'form.'.$_}=&Apache::lonnet::unescape($ENV{'form.'.$_});
$ENV{'form.'.$_}=~s/[^\w\/\s\(\)\=\-\"\']//g;
}
# Preprocess the category form element.
$ENV{'form.category'} = 'any' if (! defined($ENV{'form.category'}) ||
ref($ENV{'form.category'}));
#
# Check to see if enough information was filled in
foreach my $field (@BasicFields) {
if (&filled($ENV{'form.'.$field})) {
$fillflag++;
}
}
foreach my $field (@StatsFields,@EvalFields) {
if (&filled($ENV{'form.'.$field.'_max'})) {
$fillflag++;
}
if (&filled($ENV{'form.'.$field.'_min'})) {
$fillflag++;
}
}
for my $field ('lowestgradelevel','highestgradelevel') {
if ( $ENV{'form.'.$field} =~ /^\d+$/ &&
$ENV{'form.'.$field} > 0) {
$fillflag++;
}
}
if (! $fillflag) {
&output_blank_field_error($r,$closebutton,
'phase=disp_adv',$hidden_fields);
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 $field (@BasicFields) {
if ($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);
}
}
#
# Make the 'mime' from 'form.category' and 'form.extension'
#
my $searchphrase;
if (exists($ENV{'form.category'}) &&
$ENV{'form.category'} !~ /^\s*$/ &&
$ENV{'form.category'} ne 'any') {
my @extensions = &Apache::loncommon::filecategorytypes
($ENV{'form.category'});
if (scalar(@extensions) > 0) {
$searchphrase = join(' OR ',@extensions);
}
}
if (defined($searchphrase)) {
push @queries,&build_SQL_query('mime',$searchphrase);
$pretty_search_string .=$font.'mime</font> contains <b>'.
$searchphrase.'</b><br />';
}
#
# Evaluate option lists
if ($ENV{'form.lowestgradelevel'} &&
$ENV{'form.lowestgradelevel'} ne '0' &&
$ENV{'form.lowestgradelevel'} =~ /^\d+$/) {
push(@queries,
'(lowestgradelevel>='.$ENV{'form.lowestgradelevel'}.')');
$pretty_search_string.="lowestgradelevel>=".
$ENV{'form.lowestgradelevel'}."<br />\n";
}
if ($ENV{'form.highestgradelevel'} &&
$ENV{'form.highestgradelevel'} ne '0' &&
$ENV{'form.highestgradelevel'} =~ /^\d+$/) {
push(@queries,
'(highestgradelevel<='.$ENV{'form.highestgradelevel'}.')');
$pretty_search_string.="highestgradelevel<=".
$ENV{'form.highestgradelevel'}."<br />\n";
}
if ($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";
}
#
# Statistics
foreach my $field (@StatsFields,@EvalFields) {
my ($min,$max);
if (exists($ENV{'form.'.$field.'_min'}) &&
$ENV{'form.'.$field.'_min'} ne '') {
$min = $ENV{'form.'.$field.'_min'};
}
if (exists($ENV{'form.'.$field.'_max'}) &&
$ENV{'form.'.$field.'_max'} ne '') {
$max = $ENV{'form.'.$field.'_max'};
}
next if (! defined($max) && ! defined($min));
if (defined($min) && defined($max)) {
($min,$max) = sort {$a <=>$b} ($min,$max);
}
if (defined($min) && $min =~ /^(\d+\.\d+|\d+|\.\d+)$/) {
push(@queries,'('.$field.'>'.$min.')');
$pretty_search_string.=$font.$field.'</font>>'.$min.'<br />';
}
if (defined($max) && $max =~ /^(\d+\.\d+|\d+|\.\d+)$/) {
push(@queries,'('.$field.'<'.$max.')');
$pretty_search_string.=$font.$field.'</font><'.$max.'<br />';
}
}
#
# Evaluate date windows
my $cafter =
&Apache::lonhtmlcommon::get_date_from_form('creationdate1');
my $cbefore =
&Apache::lonhtmlcommon::get_date_from_form('creationdate2');
if ($cafter > $cbefore) {
my $tmp = $cafter;
$cafter = $cbefore;
$cbefore = $tmp;
}
my $mafter =
&Apache::lonhtmlcommon::get_date_from_form('revisiondate1');
my $mbefore =
&Apache::lonhtmlcommon::get_date_from_form('revisiondate2');
if ($mafter > $mbefore) {
my $tmp = $mafter;
$mafter = $mbefore;
$mbefore = $tmp;
}
my ($datequery,$error,$prettydate)=&build_date_queries($cafter,$cbefore,
$mafter,$mbefore);
if (defined($error)) {
&output_date_error($r,$error,$closebutton,$hidden_fields);
} elsif (defined($datequery)) {
# Here is where you would set up pretty_search_string to output
# date query information.
$pretty_search_string .= '<br />'.$prettydate.'<br />';
push @queries,$datequery;
}
#
# Process form information for custom metadata querying
my $customquery=undef;
##
## The custom metadata search was removed q long time ago mostly
## because I was unable to figureout exactly how it worked and could
## not imagine people actually using it. MH
##
# if ($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,$pretty_domains_string) =
&parse_domain_restrictions();
$pretty_search_string .= $pretty_domains_string."<br />\n";
#
if (@queries) {
$query="select * from metadata where ".join(" AND ",@queries);
} elsif ($customquery) {
$query = '';
}
# &Apache::lonnet::logthis('query = '.$/.$query);
return ($query,$customquery,$customshow,$libraries_to_query,
$pretty_search_string);
}
sub parse_domain_restrictions {
my $libraries_to_query = undef;
# $ENV{'form.domains'} can be either a scalar or an array reference.
# We need an array.
if (! exists($ENV{'form.domains'}) || $ENV{'form.domains'} eq '') {
return (undef,'');
}
my @allowed_domains;
if (ref($ENV{'form.domains'})) {
@allowed_domains = @{$ENV{'form.domains'}};
} else {
@allowed_domains = ($ENV{'form.domains'});
}
#
my %domain_hash = ();
my $pretty_domains_string;
foreach (@allowed_domains) {
$domain_hash{$_}++;
}
if ($domain_hash{'any'}) {
$pretty_domains_string = "In all LON-CAPA domains.";
} else {
if (@allowed_domains > 1) {
$pretty_domains_string = "In LON-CAPA domains:";
} else {
$pretty_domains_string = "In LON-CAPA 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,$_;
}
}
}
return ($libraries_to_query,$pretty_domains_string);
}
######################################################################
######################################################################
=pod
=item &parse_basic_search()
Parse the basic search form and return a scalar containing an sql query.
=cut
######################################################################
######################################################################
sub parse_basic_search {
my ($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;
}
my ($libraries_to_query,$pretty_domains_string) =
&parse_domain_restrictions();
#
# Check to see if enough of a query is filled in
my $search_string = $ENV{'form.basicexp'};
$search_string =~ s/(not\s*$|^\s*(and|or)|)//gi;
if (! &filled($search_string)) {
&output_blank_field_error($r,$closebutton,'phase=disp_basic');
return OK;
}
my $pretty_search_string = '<b>'.$ENV{'form.basicexp'}.'</b>';
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'};
$query=&build_SQL_query('concat_ws(" ",'.$concatarg.')',$search_string);
if (defined($pretty_domains_string) && $pretty_domains_string ne '') {
$pretty_search_string .= ' '.$pretty_domains_string;
}
$pretty_search_string .= "<br />\n";
my $final_query = 'SELECT * FROM metadata WHERE '.$query;
# &Apache::lonnet::logthis($final_query);
return ($final_query,$pretty_search_string,
$libraries_to_query);
}
######################################################################
######################################################################
=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 \"\%$value\%\")";
} elsif (lc($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,$pattern);
}
######################################################################
######################################################################
=pod
=item &build_date_queries()
Builds a SQL logic query to check time/date entries.
Also reports errors (check for /^Incorrect/).
=cut
######################################################################
######################################################################
sub build_date_queries {
my ($cafter,$cbefore,$mafter,$mbefore) = @_;
my ($result,$error,$pretty_string);
#
# Verify the input
if (! defined($cafter) && ! defined($cbefore) &&
! defined($mafter) && ! defined($mbefore)) {
# This is an okay situation, so return undef for the error
return (undef,undef,undef);
}
if ((defined($cafter) && ! defined($cbefore)) ||
(defined($cbefore) && ! defined($cafter))) {
# This is bad, so let them know
$error = &mt('Incorrect entry for the creation date. '.
'You must specify both the beginning and ending dates.');
}
if (! defined($error) &&
((defined($mafter) && ! defined($mbefore)) ||
(defined($mbefore) && ! defined($mafter)))) {
# This is also bad, so let them know
$error = &mt('Incorrect entry for the last revision date. '.
'You must specify both the beginning and ending dates.');
}
if (! defined($error)) {
#
# Build the queries
my @queries;
if (defined($cbefore) && defined($cafter)) {
my (undef,undef,undef,$caday,$camon,$cayear) = localtime($cafter);
my (undef,undef,undef,$cbday,$cbmon,$cbyear) = localtime($cbefore);
# Correct for year being relative to 1900
$cayear+=1900; $cbyear+=1900;
my $cquery=
'(creationdate BETWEEN '.
"'".$cayear.'-'.$camon.'-'.$caday."'".
' AND '.
"'".$cbyear.'-'.$cbmon.'-'.$cbday." 23:59:59')";
$pretty_string .= '<br />' if (defined($pretty_string));
$pretty_string .=
&mt('created between [_1] and [_2]',
&Apache::lonlocal::locallocaltime($cafter),
&Apache::lonlocal::locallocaltime($cbefore+24*60*60-1));
push(@queries,$cquery);
$pretty_string =~ s/ 00:00:00//g;
}
if (defined($mbefore) && defined($mafter)) {
my (undef,undef,undef,$maday,$mamon,$mayear) = localtime($mafter);
my (undef,undef,undef,$mbday,$mbmon,$mbyear) = localtime($mbefore);
# Correct for year being relative to 1900
$mayear+=1900; $mbyear+=1900;
my $mquery=
'(lastrevisiondate BETWEEN '.
"'".$mayear.'-'.$mamon.'-'.$maday."'".
' AND '.
"'".$mbyear.'-'.$mbmon.'-'.$mbday." 23:59:59')";
push(@queries,$mquery);
$pretty_string .= '<br />' if (defined($pretty_string));
$pretty_string .=
&mt('last revised between [_1] and [_2]',
&Apache::lonlocal::locallocaltime($mafter),
&Apache::lonlocal::locallocaltime($mbefore+24*60*60-1));
$pretty_string =~ s/ 00:00:00//g;
}
if (@queries) {
$result .= join(" AND ",@queries);
}
}
return ($result,$error,$pretty_string);
}
######################################################################
######################################################################
=pod
=item ©right_check()
Inputs: $Metadata, a hash pointer of metadata for a resource.
Returns: 1 if the resource is available to the user making the query,
0 otherwise.
=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 &ensure_db_and_table()
Ensure we can get lonmysql to connect to the database and the table we
need exists.
Inputs: $r, table id
Returns: undef on error, 1 if the table exists.
=cut
######################################################################
######################################################################
sub ensure_db_and_table {
my ($r,$table) = @_;
##
## Sanity check the table id.
##
if (! defined($table) || $table eq '' || $table =~ /\D/ ) {
$r->print("Unable to retrieve search results. ".
"Unable to determine the table results were stored in. ".
"</body></html>");
return undef;
}
##
## Make sure we can connect and the table exists.
##
my $connection_result = &Apache::lonmysql::connect_to_db();
if (!defined($connection_result)) {
$r->print("Unable to connect to the MySQL database where your results".
" are stored. </body></html>");
&Apache::lonnet::logthis("lonsearchcat: unable to get lonmysql to".
" connect to database.");
&Apache::lonnet::logthis(&Apache::lonmysql::get_error());
return undef;
}
my $table_check = &Apache::lonmysql::check_table($table);
if (! defined($table_check)) {
$r->print("A MySQL error has occurred.</form></body></html>");
&Apache::lonnet::logthis("lonmysql was unable to determine the status".
" of table ".$table);
return undef;
} 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 undef;
}
return 1;
}
######################################################################
######################################################################
=pod
=item &print_sort_form()
The sort feature is not implemented at this time. This form just prints
a link to change the search query.
=cut
######################################################################
######################################################################
sub print_sort_form {
my ($r,$pretty_query_string) = @_;
my $bodytag=&Apache::loncommon::bodytag(undef,undef,undef,1);
##
my %SortableFields=&Apache::lonlocal::texthash(
id => 'Default',
title => 'Title',
author => 'Author',
subject => 'Subject',
url => 'URL',
version => 'Version Number',
mime => 'Mime type',
lang => 'Language',
owner => 'Owner/Publisher',
copyright => 'Copyright',
hostname => 'Host',
creationdate => 'Creation Date',
lastrevisiondate => 'Revision Date'
);
##
my $table = $ENV{'form.table'};
return if (! &ensure_db_and_table($r,$table));
##
## Get the number of results
##
my $total_results = &Apache::lonmysql::number_of_rows($table);
if (! defined($total_results)) {
$r->print("A MySQL error has occurred.</form></body></html>");
&Apache::lonnet::logthis("lonmysql was unable to determine the number".
" of rows in table ".$table);
&Apache::lonnet::logthis(&Apache::lonmysql::get_error());
return;
}
my $result;
$result.=<<END;
<html>
<head>
<script>
function change_sort() {
var newloc = "/adm/searchcat?phase=results";
newloc += "&persistent_db_id=$ENV{'form.persistent_db_id'}";
newloc += "&sortby=";
newloc += document.forms.statusform.elements.sortby.value;
parent.resultsframe.location= newloc;
}
</script>
<title>Results</title>
</head>
$bodytag
<form name="statusform" action="" method="post">
<input type="hidden" name="Queue" value="" />
END
#<h2>Sort Results</h2>
#Sort by: <select size="1" name="sortby" onchange="javascript:change_sort();">
# $ENV{'form.sortby'} = 'id' if (! defined($ENV{'form.sortby'}));
# foreach (keys(%SortableFields)) {
# $result.="<option name=\"$_\"";
# if ($_ eq $ENV{'form.sortby'}) {
# $result.=" selected ";
# }
# $result.=" >$SortableFields{$_}</option>\n";
# }
# $result.="</select>\n";
my $revise = &revise_button();
$result.=<<END;
<p>
There are $total_results matches to your query. $revise
</p><p>
Search:$pretty_query_string
</p>
</form>
</body>
</html>
END
$r->print($result);
return;
}
#####################################################################
#####################################################################
=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
#####################################################################
#####################################################################
#
# These should probably be scoped but I don't have time right now...
#
my @Datatypes;
my @Fullindicies;
######################################################################
######################################################################
=pod
=item &create_results_table()
Creates the table of search results by calling lonmysql. Stores the
table id in $ENV{'form.table'}
Inputs: none.
Returns: the identifier of the table on success, undef on error.
=cut
######################################################################
######################################################################
sub set_up_table_structure {
my ($datatypes,$fullindicies) =
&LONCAPA::lonmetadata::describe_metadata_storage();
# Copy the table description before modifying it...
@Datatypes = @{$datatypes};
unshift(@Datatypes,{name => 'id',
type => 'MEDIUMINT',
restrictions => 'UNSIGNED NOT NULL',
primary_key => 'yes',
auto_inc => 'yes' });
@Fullindicies = @{$fullindicies};
return;
}
sub create_results_table {
&set_up_table_structure();
my $table = &Apache::lonmysql::create_table
( { columns => \@Datatypes,
FULLTEXT => [{'columns' => \@Fullindicies},],
} );
if (defined($table)) {
$ENV{'form.table'} = $table;
return $table;
}
return undef; # Error...
}
######################################################################
######################################################################
=pod
=item Search Status update functions
Each of the following functions changes the values of one of the
input fields used to display the search status to the user. The names
should be explanatory.
Inputs: Apache request handler ($r), text to display.
Returns: Nothing.
=over 4
=item &update_count_status()
=item &update_status()
=item &update_seconds()
=back
=cut
######################################################################
######################################################################
sub update_count_status {
my ($r,$text) = @_;
$text =~ s/\'/\\\'/g;
$r->print
("<script>document.statusform.count.value = ' $text'</script>\n");
$r->rflush();
}
sub update_status {
my ($r,$text) = @_;
$text =~ s/\'/\\\'/g;
$r->print
("<script>document.statusform.status.value = ' $text'</script>\n");
$r->rflush();
}
{
my $max_time = 40; # seconds for the search to complete
my $start_time = 0;
my $last_time = 0;
sub reset_timing {
$start_time = 0;
$last_time = 0;
}
sub time_left {
if ($start_time == 0) {
$start_time = time;
}
my $time_left = $max_time - (time - $start_time);
$time_left = 0 if ($time_left < 0);
return $time_left;
}
sub update_seconds {
my ($r) = @_;
my $time = &time_left();
if (($last_time-$time) > 0) {
$r->print("<script>".
"document.statusform.seconds.value = '$time'".
"</script>\n");
$r->rflush();
}
$last_time = $time;
}
}
######################################################################
######################################################################
=pod
=item &revise_button()
Inputs: None
Returns: html string for a 'revise search' button.
=cut
######################################################################
######################################################################
sub revise_button {
my $revise_phase = 'disp_basic';
$revise_phase = 'disp_adv' if ($ENV{'form.searchmode'} eq 'advanced');
my $newloc = '/adm/searchcat'.
'?persistent_db_id='.$ENV{'form.persistent_db_id'}.
'&cleargroupsort=1'.
'&phase='.$revise_phase;
my $result = qq{<input type="button" value="Revise search" name="revise"} .
qq{ onClick="parent.location='$newloc';" /> };
return $result;
}
######################################################################
######################################################################
=pod
=item &run_search()
Executes a search query by sending it the the other servers and putting the
results into MySQL.
=cut
######################################################################
######################################################################
sub run_search {
my ($r,$query,$customquery,$customshow,$serverlist,$pretty_string) = @_;
my $bodytag=&Apache::loncommon::bodytag(undef,undef,undef,1);
my $connection = $r->connection;
#
# Print run_search header
#
$r->print(<<END);
<html>
<head><title>Search Status</title></head>
$bodytag
<form name="statusform" action="" method="post">
<input type="hidden" name="Queue" value="" />
END
# Check to see if $pretty_string has more than one carriage return.
# Assume \n s are following <br /> s and truncate the value.
# (there is probably a better way)...
my @Lines = split /<br \/>/,$pretty_string;
if (@Lines > 2) {
$pretty_string = join '<br \>',(@Lines[0..2],'....<br />');
}
$r->print(&mt("Search: [_1]",$pretty_string));
$r->rflush();
#
# Determine the servers we need to contact.
my @Servers_to_contact;
if (defined($serverlist)) {
if (ref($serverlist) eq 'ARRAY') {
@Servers_to_contact = @$serverlist;
} else {
@Servers_to_contact = ($serverlist);
}
} else {
@Servers_to_contact = sort(keys(%Apache::lonnet::libserv));
}
my %Server_status;
#
# Check on the mysql table we will use to store results.
my $table =$ENV{'form.table'};
if (! defined($table) || $table eq '' || $table =~ /\D/ ) {
$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 (! $table_status) {
&Apache::lonnet::logthis("lonmysql error = ".
&Apache::lonmysql::get_error());
&Apache::lonnet::logthis("lonmysql debug = ".
&Apache::lonmysql::get_debug());
&Apache::lonnet::logthis('table status = "'.$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;
my $revise = &revise_button();
$r->print(<<END);
<table>
<tr><th>Status</th><th>Total Matches</th><th>Time Remaining</th><th></th></tr>
<tr>
<td><input type="text" name="status" value="" size="30" /></td>
<td><input type="text" name="count" value="" size="10" /></td>
<td><input type="text" name="seconds" value="" size="8" /></td>
<td>$revise</td>
</tr>
</table>
</form>
END
$r->rflush();
&reset_timing();
&update_seconds($r);
&update_status($r,&mt('contacting [_1]',$Servers_to_contact[0]));
while (&time_left() &&
((@Servers_to_contact) || keys(%Server_status))) {
&update_seconds($r);
#
# Send out a search request
if (@Servers_to_contact) {
# Contact one server
my $server = shift(@Servers_to_contact);
&update_status($r,&mt('contacting [_1]',$server));
my $reply=&Apache::lonnet::metadata_query($query,$customquery,
$customshow,[$server]);
($server) = keys(%$reply);
$Server_status{$server} = $reply->{$server};
} else {
# wait a sec. to give time for files to be written
# This sleep statement is here instead of outside the else
# block because we do not want to pause if we have servers
# left to contact.
if (scalar (keys(%Server_status))) {
&update_status($r,
&mt('waiting on [_1]',join(' ',keys(%Server_status))));
}
sleep(1);
}
#
# Loop through the servers we have contacted but do not
# have results from yet, looking for results.
while (my ($server,$status) = each(%Server_status)) {
last if ($connection->aborted());
&update_seconds($r);
if ($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") {
&update_status($r,&mt('Receiving results from [_1]',$server));
next;
}
last if ($connection->aborted());
if (-e "$datafile.end") {
&update_status($r,&mt('Reading results from [_1]',$server));
if (-z "$datafile") {
delete($Server_status{$server});
next;
}
my $fh;
if (!($fh=Apache::File->new($datafile))) {
$r->print("Unable to open search results file for ".
"server $server. Omitting from search");
delete($Server_status{$server});
next;
}
# Read in the whole file.
while (my $result = <$fh>) {
last if ($connection->aborted());
#
# Records are stored one per line
chomp($result);
next if (! $result);
#
# Parse the result.
my %Fields = &parse_raw_result($result,$server);
$Fields{'hostname'} = $server;
#
# Skip based on copyright
next if (! ©right_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());
}
#
$hitcountsum ++;
&update_seconds($r);
if ($hitcountsum % 50 == 0) {
&update_count_status($r,$hitcountsum);
}
}
$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{$server});
}
last if ($connection->aborted());
&update_count_status($r,$hitcountsum);
}
last if ($connection->aborted());
&update_seconds($r);
}
&update_status($r,&mt('Search Complete [_1]',$server));
&update_seconds($r);
#
&Apache::lonmysql::disconnect_from_db(); # This is unneccessary
#
# We have run out of time or run out of servers to talk to and
# results to get, so let the client know the top frame needs to be
# loaded from /adm/searchcat
$r->print("</body></html>");
if ($ENV{'form.catalogmode'} ne 'groupsearch') {
$r->print("<script>".
"window.location='/adm/searchcat?".
"phase=sort&".
"persistent_db_id=$ENV{'form.persistent_db_id'}';".
"</script>");
}
return;
}
######################################################################
######################################################################
=pod
=item &prev_next_buttons()
Returns html for the previous and next buttons on the search results page.
=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.
#
# Create buttons
my $buttons = '<input type="submit" name="prev" value="'.&mt('Prev').'" ';
$buttons .= '/>';
$buttons .= ' 'x3;
$buttons .= '<input type="submit" name="reload" '.
'value="'.&mt('Reload').'" />';
$buttons .= ' 'x3;
$buttons .= '<input type="submit" name="next" value="'.&mt('Next').'" ';
$buttons .= '/>';
return $buttons;
}
######################################################################
######################################################################
=pod
=item &display_results()
Prints the results out for selection and perusal.
=cut
######################################################################
######################################################################
sub display_results {
my ($r,$importbutton,$closebutton,$diropendb) = @_;
my $connection = $r->connection;
$r->print(&search_results_header($importbutton,$closebutton));
##
## Set viewing function
##
my $viewfunction = $Views{$ENV{'form.viewselect'}};
if (!defined($viewfunction)) {
$r->print("Internal Error - Bad view selected.\n");
$r->rflush();
return;
}
##
## $checkbox_num is a count of the number of checkboxes output on the
## page this is used only during catalogmode=groupsearch.
my $checkbox_num = 0;
##
## Get the catalog controls setup
##
my $action = "/adm/searchcat?phase=results";
##
## Deal with groupsearch by opening the groupsearch db file.
if ($ENV{'form.catalogmode'} eq 'groupsearch') {
if (! tie(%groupsearch_db,'GDBM_File',$diropendb,
&GDBM_WRCREAT(),0640)) {
$r->print('Unable to store import results.</form></body></html>');
$r->rflush();
return;
}
}
##
## Prepare the table for querying
my $table = $ENV{'form.table'};
return if (! &ensure_db_and_table($r,$table));
##
## Get the number of results
my $total_results = &Apache::lonmysql::number_of_rows($table);
if (! defined($total_results)) {
$r->print("A MySQL error has occurred.</form></body></html>");
&Apache::lonnet::logthis("lonmysql was unable to determine the number".
" of rows in table ".$table);
&Apache::lonnet::logthis(&Apache::lonmysql::get_error());
return;
}
##
## Determine how many results we need to get
$ENV{'form.start'} = 1 if (! exists($ENV{'form.start'}));
$ENV{'form.show'} = 20 if (! exists($ENV{'form.show'}));
if (exists($ENV{'form.prev'})) {
$ENV{'form.start'} -= $ENV{'form.show'};
} elsif (exists($ENV{'form.next'})) {
$ENV{'form.start'} += $ENV{'form.show'};
}
$ENV{'form.start'} = 1 if ($ENV{'form.start'}<1);
$ENV{'form.start'} = $total_results if ($ENV{'form.start'}>$total_results);
my $min = $ENV{'form.start'};
my $max;
if ($ENV{'form.show'} eq 'all') {
$max = $total_results ;
} else {
$max = $min + $ENV{'form.show'} - 1;
$max = $total_results if ($max > $total_results);
}
##
## Output form elements
$r->print(&hidden_field('table').
&hidden_field('phase').
&hidden_field('persistent_db_id').
&hidden_field('start')
);
##
## Output links (if necessary) for 'prev' and 'next' pages.
$r->print
('<table width="100%"><tr><td width="50%" align="right">'.
&prev_next_buttons($min,$ENV{'form.show'},$total_results).
'</td><td align="right">'.
&viewoptions().'</td></tr></table>'
);
if ($total_results == 0) {
$r->print('<meta HTTP-EQUIV="Refresh" CONTENT="2">'.
'<h3>'.&mt('There are currently no results').'.</h3>'.
"</form></body></html>");
return;
} else {
$r->print
("<center>Results $min to $max out of $total_results</center>\n");
}
##
## Get results from MySQL table
my @Results = &Apache::lonmysql::get_rows($table,
'id>='.$min.' AND id<='.$max);
##
## Loop through the results and output them.
foreach my $row (@Results) {
if ($connection->aborted()) {
&cleanup();
return;
}
my %Fields = %{&parse_row(@$row)};
my $output="<p>\n";
if (! defined($Fields{'title'}) || $Fields{'title'} eq '') {
$Fields{'title'} = 'Untitled';
}
my $prefix=&catalogmode_output($Fields{'title'},$Fields{'url'},
$Fields{'id'},$checkbox_num++);
# Render the result into html
$output.= &$viewfunction($prefix,%Fields);
# Print them out as they come in.
$r->print($output);
$r->rflush();
}
if (@Results < 1) {
$r->print(&mt("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("</form></body></html>");
$r->rflush();
untie %groupsearch_db if (tied(%groupsearch_db));
return;
}
######################################################################
######################################################################
=pod
=item &catalogmode_output($title,$url,$fnum,$checkbox_num)
Returns html needed for the various catalog modes. Gets inputs from
$ENV{'form.catalogmode'}. Stores data in %groupsearch_db.
=cut
######################################################################
######################################################################
sub catalogmode_output {
my $output = '';
my ($title,$url,$fnum,$checkbox_num) = @_;
if ($ENV{'form.catalogmode'} eq 'interactive') {
$title=~ s/\'/\\\'/g;
if ($ENV{'form.catalogmode'} eq 'interactive') {
$output.=<<END
<font size='-1'><INPUT TYPE="button" NAME="returnvalues" VALUE="SELECT"
onClick="javascript:select_data('$title','$url')">
</font>
END
}
} elsif ($ENV{'form.catalogmode'} eq 'groupsearch') {
$groupsearch_db{"pre_${fnum}_link"}=$url;
$groupsearch_db{"pre_${fnum}_title"}=$title;
$output.=<<END;
<font size='-1'>
<input type="checkbox" name="returnvalues" value="SELECT"
onClick="javascript:queue($checkbox_num,$fnum)" />
</font>
END
}
return $output;
}
######################################################################
######################################################################
=pod
=item &parse_row()
Parse a row returned from the database.
=cut
######################################################################
######################################################################
sub parse_row {
my @Row = @_;
my %Fields;
if (! scalar(@Datatypes)) {
&set_up_table_structure();
}
for (my $i=0;$i<=$#Row;$i++) {
$Fields{$Datatypes[$i]->{'name'}}=&Apache::lonnet::unescape($Row[$i]);
}
$Fields{'language'} =
&Apache::loncommon::languagedescription($Fields{'language'});
$Fields{'copyrighttag'} =
&Apache::loncommon::copyrightdescription($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 according to column labels
In addition, the following tags are set by calling the appropriate
lonnet function: 'language', 'copyrighttag', '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) = @_;
# conclude from self to others regarding fields
my %Fields=&LONCAPA::lonmetadata::metadata_col_to_hash
(map {
&Apache::lonnet::unescape($_);
} (split(/\,/,$result)) );
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 $mode is either (at this writing) 'Basic' or 'Advanced'
=back
The following environment variables are checked:
=over 4
=item 'form.catalogmode'
Checked for 'interactive' and 'groupsearch'.
=item 'form.mode'
Checked for existance & 'edit' mode.
=item 'form.form'
Contains the name of the form that has the input fields to set
=item 'form.element'
the name of the input field to put the URL into
=item 'form.titleelement'
the name of the input field to put the title into
=back
=cut
######################################################################
######################################################################
sub search_results_header {
my ($importbutton,$closebutton) = @_;
my $bodytag=&Apache::loncommon::bodytag(undef,undef,undef,1);
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') {
$result.=<<SCRIPT;
<script type="text/javascript">
function select_data(title,url) {
changeTitle(title);
changeURL(url);
parent.close();
}
function changeTitle(val) {
if (parent.opener.inf.document.forms.resinfo.elements.t) {
parent.opener.inf.document.forms.resinfo.elements.t.value=val;
}
}
function changeURL(val) {
if (parent.opener.inf.document.forms.resinfo.elements.u) {
parent.opener.inf.document.forms.resinfo.elements.u.value=val;
}
}
</script>
SCRIPT
} elsif ($ENV{'form.mode'} eq 'edit') {
my $form = $ENV{'form.form'};
my $element = $ENV{'form.element'};
my $titleelement = $ENV{'form.titleelement'};
my $changetitle;
if (!$titleelement) {
$changetitle='function changeTitle(val) {}';
} else {
$changetitle=<<END;
function changeTitle(val) {
if (parent.targetwin.document) {
parent.targetwin.document.forms["$form"].elements["$titleelement"].value=val;
} else {
var url = 'forms[\"$form\"].elements[\"$titleelement\"].value';
alert("Unable to transfer data to "+url);
}
}
END
}
$result.=<<SCRIPT;
<script type="text/javascript">
function select_data(title,url) {
changeURL(url);
changeTitle(title);
parent.close();
}
$changetitle
function changeURL(val) {
if (parent.targetwin.document) {
parent.targetwin.document.forms["$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 $ENV{'form.catalogmode'} eq 'groupsearch';
<script type="text/javascript">
function queue(checkbox_num,val) {
if (document.forms.results.returnvalues.length != "undefined" &&
typeof(document.forms.results.returnvalues.length) == "number") {
if (document.forms.results.returnvalues[checkbox_num].checked) {
parent.statusframe.document.forms.statusform.elements.Queue.value +='1a'+val+'b';
} else {
parent.statusframe.document.forms.statusform.elements.Queue.value +='0a'+val+'b';
}
} else {
if (document.forms.results.returnvalues.checked) {
parent.statusframe.document.forms.statusform.elements.Queue.value +='1a'+val+'b';
} else {
parent.statusframe.document.forms.statusform.elements.Queue.value +='0a'+val+'b';
}
}
}
function select_group() {
parent.window.location=
"/adm/groupsort?mode=$ENV{'form.mode'}&catalogmode=groupsearch&acts="+
parent.statusframe.document.forms.statusform.elements.Queue.value;
}
</script>
SCRIPT
$result.=<<END;
</head>
$bodytag
<form name="results" method="post" action="/adm/searchcat" >
<input type="hidden" name="Queue" value="" />
$importbutton
END
return $result;
}
######################################################################
######################################################################
sub search_status_header {
my $bodytag=&Apache::loncommon::bodytag(undef,undef,undef,1);
return <<ENDSTATUS;
<html><head><title>Search Status</title></head>
$bodytag
<h3>Search Status</h3>
Sending search request to LON-CAPA servers.<br />
ENDSTATUS
}
sub results_link {
my $basic_link = "/adm/searchcat?"."&table=".$ENV{'form.table'}.
"&persistent_db_id=".$ENV{'form.persistent_db_id'};
my $results_link = $basic_link."&phase=results".
"&pause=1"."&start=1";
return $results_link;
}
######################################################################
######################################################################
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 = &results_link();
my $result = <<"ENDFRAMES";
<html>
<head>
<script>
var targetwin = opener;
var queue = '';
</script>
<title>LON-CAPA Digital Library Search Results</title>
</head>
<frameset rows="150,*">
<frame name="statusframe" src="$run_search_link">
<frame name="resultsframe" src="$results_link">
</frameset>
</html>
ENDFRAMES
$r->print($result);
return;
}
######################################################################
######################################################################
=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 ($prefix,%values) = @_;
my $result;
$result .= '<b>'.$prefix.
'<img src="'.&Apache::loncommon::icon($values{'url'}).' " />'.' '.
'<a href="http://'.$ENV{'HTTP_HOST'}.$values{'url'}.'" '.
'target="search_preview">'.$values{'title'}."</a></b>\n";
$result .= "<p>\n";
$result .= '<b>'.$values{'author'}.'</b>,'.
' <i>'.$values{'owner'}.'</i><br />';
foreach my $field
(
{ name=>'url',
translate => '<b>URL:</b> [_1]',
special => 'url link',},
{ name=>'subject',
translate => '<b>Subject:</b> [_1]',},
{ name=>'keywords',
translate => '<b>Keywords:</b> [_1]',},
{ name=>'notes',
translate => '<b>Notes:</b> [_1]',},
{ name=>'mimetag',
translate => '<b>MIME Type:</b> [_1]',},
{ name=>'standards',
translate => '<b>Standards:</b>[_1]',},
{ name=>'copyrighttag',
translate => '<b>Copyright/Distribution:</b> [_1]',},
{ name=>'count',
translate => '<b>Access Count:</b> [_1]',},
{ name=>'stdno',
translate => '<b>Number of Students:</b> [_1]',},
{ name=>'avetries',
translate => '<b>Average Tries:</b> [_1]',},
{ name=>'disc',
translate => '<b>Degree of Discrimination:</b> [_1]',},
{ name=>'difficulty',
translate => '<b>Degree of Difficulty:</b> [_1]',},
{ name=>'clear',
translate => '<b>Clear:</b> [_1]',},
{ name=>'depth',
translate => '<b>Depth:</b> [_1]',},
{ name=>'helpful',
translate => '<b>Helpful:</b> [_1]',},
{ name=>'correct',
translate => '<b>Correcy:</b> [_1]',},
{ name=>'technical',
translate => '<b>Technical:</b> [_1]',},
) {
if (exists($values{$field->{'name'}}) &&
$values{$field->{'name'}} ne '') {
if ($field->{'special'} eq 'url link') {
$result.=
&mt($field->{'translate'},
'<a href="'.$values{'url'}.'" '.
'target="search_preview">'.
$values{$field->{'name'}}.
'</a>');
} else {
$result.= &mt($field->{'translate'},
$values{$field->{'name'}});
}
$result .= "<br />\n";
}
}
$result .= "</p>";
if (exists($values{'extrashow'}) && $values{'extrashow'} ne '') {
$result .= '<p>'.$values{'extrashow'}.'</p>';
}
if (exists($values{'shortabstract'}) && $values{'shortabstract'} ne '') {
$result .= '<p>'.$values{'shortabstract'}.'</p>';
}
$result .= '<hr align="left" width="200" noshade />'."\n";
return $result;
}
######################################################################
######################################################################
sub has_stat_data {
my ($values) = @_;
if ( (defined($values->{'count'}) && $values->{'count'} ne '') ||
(defined($values->{'stdno'}) && $values->{'stdno'} ne '') ||
(defined($values->{'disc'}) && $values->{'disc'} ne '') ||
(defined($values->{'avetries'}) && $values->{'avetries'} ne '') ||
(defined($values->{'difficulty'}) && $values->{'difficulty'} ne '')) {
return 1;
}
return 0;
}
sub statfields {
return ('count','stdno','disc','avetries','difficulty');
}
sub has_eval_data {
my ($values) = @_;
if ( (defined($values->{'clear'}) && $values->{'clear'} ne '') ||
(defined($values->{'technical'}) && $values->{'technical'} ne '') ||
(defined($values->{'correct'}) && $values->{'correct'} ne '') ||
(defined($values->{'helpful'}) && $values->{'helpful'} ne '') ||
(defined($values->{'depth'}) && $values->{'depth'} ne '')) {
return 1;
}
return 0;
}
sub evalfields {
return ('clear','technical','correct','helpful','depth');
}
######################################################################
######################################################################
=pod
=item &summary_view()
=cut
######################################################################
######################################################################
sub summary_view {
my ($prefix,%values) = @_;
my $icon=&Apache::loncommon::icon($values{'url'});
my $result=<<END;
$prefix<img src="$icon" />
<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>
<hr align='left' width='200' noshade />
END
return $result;
}
######################################################################
######################################################################
=pod
=item &compact_view()
=cut
######################################################################
######################################################################
sub compact_view {
my ($prefix,%values) = @_;
my $result =
$prefix.'<img src="'.&Apache::loncommon::icon($values{'url'}).
'"> <a href="'.$values{'url'}.'" target="search_preview">'.
$values{'title'}.'</a>'.(' 'x2).
'<b>'.$values{'author'}.'</b><br />';
return $result;
}
######################################################################
######################################################################
=pod
=item &fielded_format_view()
=cut
######################################################################
######################################################################
sub fielded_format_view {
my ($prefix,%values) = @_;
my $icon=&Apache::loncommon::icon($values{'url'});
my %Translated = &Apache::lonmeta::fieldnames();
my $result=<<END;
$prefix <img src="$icon" />
<dl>
<dt>URL:</dt>
<dd><a href="http://$ENV{'HTTP_HOST'}$values{'url'}"
target='search_preview'>$values{'url'}</a></dd>
END
foreach my $field ('title','author','subject','keywords','notes',
'mimetag','language','creationdate','lastrevisiondate',
'owner','copyrighttag','hostname','abstract') {
$result .= (' 'x4).'<dt>'.$Translated{$field}.'</dt>'."\n".
(' 'x8).'<dd>'.$values{$field}.'</dd>'."\n";
}
if (&has_stat_data(\%values)) {
foreach my $field (&statfields()) {
$result .= (' 'x4).'<dt>'.$Translated{$field}.'</dt>'."\n".
(' 'x8).'<dd>'.$values{$field}.'</dd>'."\n";
}
}
if (&has_eval_data(\%values)) {
foreach my $field (&evalfields()) {
$result .= (' 'x4).'<dt>'.$Translated{$field}.'</dt>'."\n".
(' 'x8).'<dd>'.$values{$field}.'</dd>'."\n";
}
}
$result .= "</dl>\n";
$result .= $values{'extrashow'};
$result .= '<hr align="left" width="200" noshade />'."\n";
return $result;
}
######################################################################
######################################################################
=pod
=item &xml_sgml_view()
=back
=cut
######################################################################
######################################################################
sub xml_sgml_view {
my ($prefix,%values) = @_;
my $xml = '<LonCapaResource>'."\n";
# The usual suspects
foreach my $field ('url','title','author','subject','keywords','notes') {
$xml .= qq{<$field>$values{$field}</$field>}."\n";
}
#
$xml .= "<mimeInfo>\n";
foreach my $field ('mime','mimetag') {
$xml .= qq{<$field>$values{$field}</$field>}."\n";
}
$xml .= "</mimeInfo>\n";
#
$xml .= "<languageInfo>\n";
foreach my $field ('language','languagetag') {
$xml .= qq{<$field>$values{$field}</$field>}."\n";
}
$xml .= "</languageInfo>\n";
#
foreach my $field ('creationdate','lastrevisiondate','owner') {
$xml .= qq{<$field>$values{$field}</$field>}."\n";
}
#
$xml .= "<copyrightInfo>\n";
foreach my $field ('copyright','copyrighttag') {
$xml .= qq{<$field>$values{$field}</$field>}."\n";
}
$xml .= "</copyrightInfo>\n";
$xml .= qq{<repositoryLocation>$values{'hostname'}</repositoryLocation>}.
"\n";
$xml .= qq{<shortabstract>$values{'shortabstract'}</shortabstract>}."\n";
#
if (&has_stat_data(\%values)){
$xml .= "<problemstatistics>\n";
foreach my $field (&statfields()) {
$xml .= qq{<$field>$values{$field}</$field>}."\n";
}
$xml .= "</problemstatistics>\n";
}
#
if (&has_eval_data(\%values)) {
$xml .= "<evaluation>\n";
foreach my $field (&evalfields) {
$xml .= qq{<$field>$values{$field}</$field>}."\n";
}
$xml .= "</evaluation>\n";
}
#
$xml .= "</LonCapaResource>\n";
$xml = &HTML::Entities::encode($xml,'<>&');
my $result=<<END;
$prefix
<pre>
$xml
</pre>
$values{'extrashow'}
<hr align='left' width='200' noshade />
END
return $result;
}
######################################################################
######################################################################
=pod
=item &filled() see if field is filled.
=cut
######################################################################
######################################################################
sub filled {
my ($field)=@_;
if ($field=~/\S/ && $field ne 'any') {
return 1;
} else {
return 0;
}
}
######################################################################
######################################################################
=pod
=item &output_blank_field_error()
Output a complete page that indicates the user has not filled in enough
information to do a search.
Inputs: $r (Apache request handle), $closebutton, $parms.
Returns: nothing
$parms is extra information to include in the 'Revise search request' link.
=cut
######################################################################
######################################################################
sub output_blank_field_error {
my ($r,$closebutton,$parms,$hidden_fields)=@_;
my $bodytag=&Apache::loncommon::bodytag(undef,undef,undef,1);
# make query information persistent to allow for subsequent revision
$r->print(<<BEGINNING);
<html>
<head>
<title>The LearningOnline Network with CAPA</title>
BEGINNING
$r->print(<<RESULTS);
</head>
$bodytag
<img align='right' src='/adm/lonIcons/lonlogos.gif' />
<h1>Search Catalog</h1>
<form method="post" action="/adm/searchcat">
$hidden_fields
<a href="/adm/searchcat?$parms&persistent_db_id=$ENV{'form.persistent_db_id'}"
>Revise search request</a>
$closebutton
<hr />
<h3>Unactionable search query.</h3>
<p>
You did not fill in enough information for the search to be started.
You need to fill in relevant fields on the search page in order
for a query to be processed.
</p>
</body>
</html>
RESULTS
}
######################################################################
######################################################################
=pod
=item &output_date_error()
Output a full html page with an error message.
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,$hidden_fields)=@_;
# make query information persistent to allow for subsequent revision
my $bodytag=&Apache::loncommon::bodytag(undef,undef,undef,1);
$r->print(<<RESULTS);
<html>
<head>
<title>The LearningOnline Network with CAPA</title>
</head>
$bodytag
<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();' />
$closebutton
<hr />
<h3>Error</h3>
<p>
$message
</p>
</body>
</html>
RESULTS
}
######################################################################
######################################################################
=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 $groupsearch_db{$_};
}
}
}
1;
sub cleanup {
if (tied(%groupsearch_db)) {
unless (untie(%groupsearch_db)) {
&Apache::lonnet::logthis('Failed cleanup searchcat: groupsearch_db');
}
}
&untiehash();
&Apache::lonmysql::disconnect_from_db();
}
__END__
=pod
=back
=cut
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