--- loncom/interface/lonsearchcat.pm 2001/03/12 17:28:32 1.7 +++ loncom/interface/lonsearchcat.pm 2006/06/08 16:58:56 1.268 @@ -1,810 +1,3730 @@ -# The LearningOnline Network +# The LearningOnline Network with CAPA # Search Catalog # -# 03/08/2001 Scott Harrison +# $Id: lonsearchcat.pm,v 1.268 2006/06/08 16:58:56 www 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); -use Apache::lonnet(); +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(); +use Parse::RecDescent; +use Apache::lonnavmaps; +use Apache::lonindexer(); +use lib '/home/httpd/lib/perl/'; +use LONCAPA; + +###################################################################### +###################################################################### +## +## 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, + "detailedpreview" => \&detailed_citation_preview, + "summary" => \&summary_view, + "summarypreview" => \&summary_preview, + "fielded" => \&fielded_format_view, + "xml" => \&xml_sgml_view, + "compact" => \&compact_view); -my %language; -my $scrout; -my %metadatafields; -my %cprtag; -my %mimetag; - +###################################################################### +###################################################################### sub handler { my $r = shift; - -# -------------------------------------- see if called from an interactive mode - map { - my ($name, $value) = split(/=/,$_); - $value =~ tr/+/ /; - $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg; - if ($name eq 'catalogmode') { - $ENV{'form.'.$name}=$value; - } - } (split(/&/,$ENV{'QUERY_STRING'})); - - $r->content_type('text/html'); +# &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 $loaderror=&Apache::lonnet::overloaderror($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'}_sel_res.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; + } - %metadatafields=(); + my $persistent_db_file = "/home/httpd/perl/tmp/". + &escape($domain). + '_'.&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", + target=>'_top', + bug=>'Searching',}); + } else { + &Apache::lonhtmlcommon::add_breadcrumb + ({href=>'/adm/searchcat?'. + 'catalogmode='.$env{'form.catalogmode'}. + '&launch='.$env{'form.launch'}. + '&mode='.$env{'form.mode'}, + text=>"Catalog Search", + target=>'_top', + bug=>'Searching',}); + } + # + if ($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); + my $msg = + 'We were unable to retrieve data describing your search. '. + 'This is a serious error and has been logged. '. + 'Please alert your LON-CAPA administrator.'; + &Apache::loncommon::simple_error_page($r,'Search Error', + $msg); + return OK; + } + } + } else { + &clean_up_environment(); + } + ## + ## Clear out old values from groupsearch database + ## + untie %groupsearch_db if (tied(%groupsearch_db)); + if (($env{'form.cleargroupsort'} eq '1') || + (($env{'form.launch'} eq '1') && + ($env{'form.catalogmode'} eq 'import'))) { + 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. + my $msg = 'Unable to tie hash to db file.'; + &Apache::loncommon::simple_error_page($r,'Search Error', + $msg); + return OK; + } + } + ## + ## Configure hidden fields + ## + $hidden_fields = ''."\n"; + if (exists($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=" +END + } else { + $closebutton = ''; + $importbutton = ''; + } + ## + ## Sanity checks on form elements + ## + if (!defined($env{'form.viewselect'})) { + $env{'form.viewselect'} ="summary"; + } + $env{'form.phase'} = 'disp_basic' if (! exists($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')) { + # + # We are running a search, try to parse it + 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); + return OK if (! defined($query)); + &make_persistent({ basicexp => $env{'form.basicexp'}}, + $persistent_db_file); + } else { # Advanced search + ($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); + # + # 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); + + my $msg = + 'Unable to create table in which to store search results. '. + 'The search has been aborted.'; + &Apache::loncommon::simple_error_page($r,'Search Error', + $msg); + return OK; + } + delete($env{'form.launch'}); + if (! &make_form_data_persistent($r,$persistent_db_file)) { + my $msg= + 'Unable to properly store search information. '. + 'The search has been aborted.'; + &Apache::loncommon::simple_error_page($r,'Search Error', + $msg); + return OK; + } + ## + ## Print out the frames interface + ## + if (defined($query)) { + &print_frames_interface($r); + } + } + return OK; +} -# ------------------------------------------------ First, check out environment - $metadatafields{'owner'}=$ENV{'user.name'}.'@'.$ENV{'user.domain'}; +# +# The mechanism used to store values away and retrieve them does not +# handle the case of missing environment variables being significant. +# +# This routine sets non existant checkbox form elements to ''. +# +sub clean_up_environment { + if ($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'} = ''; + } + } +} - - %language=(); - $language{'any'}='Any language'; - { - my $fh=Apache::File->new($r->dir_config('lonTabDir').'/language.tab'); - map { - $_=~/(\w+)\s+([\w\s\-]+)/; - $language{$1}=$2; - } <$fh>; +sub hidden_field { + my ($name,$value) = @_; + if (! defined($value)) { + $value = $env{'form.'.$name}; } + return ''.$/; +} - %cprtag=(); - $cprtag{'any'}='Any copyright/distribution'; - { - my $fh=Apache::File->new($r->dir_config('lonIncludes').'/copyright.tab'); - map { - $_=~/(\w+)\s+([\w\s\-]+)/; - $cprtag{$1}=$2; - } <$fh>; +###################################################################### +###################################################################### +## +## Course Search +## +###################################################################### +###################################################################### +{ # Scope the course search to avoid global variables +# +# Variables For course search +my %alreadyseen; +my %hash; +my $totalfound; + +sub make_symb { + my ($id)=@_; + my ($mapid,$resid)=split(/\./,$id); + my $map=$hash{'map_id_'.$mapid}; + my $res=$hash{'src_'.$id}; + my $symb=&Apache::lonnet::encode_symb($map,$resid,$res); + return $symb; +} + +sub course_search { + my $r=shift; + my $pretty_search_string = ''.$env{'form.courseexp'}.''; + my $search_string = $env{'form.courseexp'}; + my @New_Words; + undef(%alreadyseen); + if ($env{'form.crsrelated'}) { + ($search_string,@New_Words) = &related_version($env{'form.courseexp'}); + if (@New_Words) { + $pretty_search_string .= ' '.&mt("with related words").": @New_Words."; + } else { + $pretty_search_string .= ' '.&mt('with no related words')."."; + } + } + my $fulltext=$env{'form.crsfulltext'}; + my $discuss=$env{'form.crsdiscuss'}; + my @allwords=($search_string,@New_Words); + $totalfound=0; + $r->print(&Apache::loncommon::start_page('Course Search'). + '
'. + $pretty_search_string.'
'. + '
'.&mt('Course content').':
'); + $r->rflush(); +# ======================================================= Go through the course + my $c=$r->connection; + if (tie(%hash,'GDBM_File',$env{'request.course.fn'}.".db", + &GDBM_READER(),0640)) { + foreach (sort(keys(%hash))) { + if ($c->aborted()) { last; } + if (($_=~/^src\_(.+)$/)) { + if ($hash{'randomout_'.$1} & !$env{'request.role.adv'}) { + next; + } + my $symb=&make_symb($1); + &checkonthis($r,$1,$hash{$_},0,&Apache::lonnet::gettitle($symb), + $fulltext,$symb,@allwords); + } + } + untie(%hash); + } + unless ($totalfound) { + $r->print('

'.&mt('No matches found in resources').'.

'); } - %mimetag=(); - $mimetag{'any'}='Any type'; - { - my $fh=Apache::File->new($r->dir_config('lonTabDir').'/filetypes.tab'); - map { - $_=~/(\w+)\s+(\w+)\s+([\w\s\-]+)/; - $mimetag{$1}=".$1 $3"; - } <$fh>; +# Check discussions if requested + if ($discuss) { + my $totaldiscussions = 0; + $r->print('

'.&mt('Discussion postings').':
'); + my $navmap = Apache::lonnavmaps::navmap->new(); + my @allres=$navmap->retrieveResources(); + my %discussiontime = &Apache::lonnet::dump('discussiontimes', + $env{'course.'.$env{'request.course.id'}.'.domain'}, + $env{'course.'.$env{'request.course.id'}.'.num'}); + foreach my $resource (@allres) { + my $result = ''; + my $applies = 0; + my $symb = $resource->symb(); + my $ressymb = $symb; + if ($symb =~ m#(___adm/\w+/\w+)/(\d+)/bulletinboard$#) { + $ressymb = 'bulletin___'.$2.$1.'/'.$2.'/bulletinboard'; + unless ($ressymb =~ m#bulletin___\d+___adm/wrapper#) { + $ressymb=~s#(bulletin___\d+___)#$1adm/wrapper/#; + } + } + if (defined($discussiontime{$ressymb})) { + my %contrib = &Apache::lonnet::restore($ressymb,$env{'request.course.id'}, + $env{'course.'.$env{'request.course.id'}.'.domain'}, + $env{'course.'.$env{'request.course.id'}.'.num'}); + if ($contrib{'version'}) { + for (my $id=1;$id<=$contrib{'version'};$id++) { + unless (($contrib{'hidden'}=~/\.$id\./) || ($contrib{'deleted'}=~/\.$id\./)) { + if ($contrib{$id.':subject'}) { + $result .= $contrib{$id.':subject'}; + } + if ($contrib{$id.':message'}) { + $result .= $contrib{$id.':message'}; + } + if ($contrib{$id,':attachmenturl'}) { + if ($contrib{$id,':attachmenturl'} =~ m-/([^/]+)$-) { + $result .= $1; + } + } + $applies = &checkwords($result,$applies,@allwords); + } + } + } + } +# Does this discussion apply? + if ($applies) { + my ($map,$ind,$url)=&Apache::lonnet::decode_symb($ressymb); + my $disctype = &mt('resource'); + if ($url =~ m#/bulletinboard$#) { + if ($url =~m#^adm/wrapper/adm/.*/bulletinboard$#) { + $url =~s#^adm/wrapper##; + } + $disctype = &mt('bulletin board'); + } else { + $url = '/res/'.$url; + } + if ($url =~ /\?/) { + $url .= '&symb='; + } else { + $url .= '?symb='; + } + $url .= &escape($resource->symb()); + my $title = $resource->compTitle(); + $r->print('
'. + ($title?$title:$url).'  - '.$disctype.'
'); + $totaldiscussions++; + } else { + $r->print(' .'); + } + } + unless ($totaldiscussions) { + $r->print('

'.&mt('No matches found in postings').'.

'); + } } + +# =================================================== Done going through course + $r->print(&Apache::loncommon::end_page()); +} + +# =============================== This pulls up a resource and its dependencies - if ($ENV{'form.basicsubmit'} eq 'SEARCH') { - return &basicsearch($r,$ENV{'form.basicexp'}); +sub checkonthis { + my ($r,$id,$url,$level,$title,$fulltext,$symb,@allwords)=@_; + $alreadyseen{$id}=1; + if (&Apache::loncommon::connection_aborted($r)) { return; } + $r->rflush(); + + my $result=$title.' '; + if ($env{'request.role.adv'} || !$hash{'encrypted_'.$id}) { + $result.=&Apache::lonnet::metadata($url,'title').' '. + &Apache::lonnet::metadata($url,'subject').' '. + &Apache::lonnet::metadata($url,'abstract').' '. + &Apache::lonnet::metadata($url,'keywords'); + } + my ($extension)=($url=~/\.(\w+)$/); + if (&Apache::loncommon::fileembstyle($extension) eq 'ssi' && + ($url) && ($fulltext)) { + $result.=&Apache::lonnet::ssi_body($url.'?symb='.&escape($symb)); } + $result=~s/\s+/ /gs; + my $applies = 0; + $applies = &checkwords($result,$applies,@allwords); +# Does this resource apply? + if ($applies) { + $r->print('
'); + for (my $i=0;$i<=$level*5;$i++) { + $r->print(' '); + } + my $href=$url; + if ($hash{'encrypted_'.$id} && !$env{'request.role.adv'}) { + $href=&Apache::lonenc::encrypted($href) + .'?symb='.&Apache::lonenc::encrypted($symb); + } else { + $href.='?symb='.&escape($symb); + } + $r->print(''.($title?$title:$url). + '
'); + $totalfound++; + } elsif ($fulltext) { + $r->print(' .'); + } + $r->rflush(); +# Check also the dependencies of this one + my $dependencies= + &Apache::lonnet::metadata($url,'dependencies'); + foreach (split(/\,/,$dependencies)) { + if (($_=~/^\/res\//) && (!$alreadyseen{$id})) { + &checkonthis($r,$id,$_,$level+1,'',$fulltext,undef,@allwords); + } + } +} - $scrout=""; - $scrout.=&searchphrasefield('Limit by title','title', - ''); +sub checkwords { + my ($result,$applies,@allwords) = @_; + foreach (@allwords) { + if ($_=~/\w/) { + if ($result=~/$_/si) { + $applies++; + } + } + } + return $applies; +} - $scrout.=&searchphrasefield('Limit by author','author', - ''); +sub untiehash { + if (tied(%hash)) { + untie(%hash); + } +} - $scrout.=&searchphrasefield('Limit by subject','subject', - ''); +} # End of course search scoping - $scrout.=&searchphrasefield('Limit by notes','notes', - ''); - $scrout.=&searchphrasefield('Limit by abstract','abstract', - ''); +###################################################################### +###################################################################### - $scrout.=&selectbox('Limit by MIME type','mime', - 'notxxx',%mimetag); +=pod - $scrout.=&selectbox('Limit by language','language', - 'any',%language); - - $scrout.=<'; + my $onlysearchdomain=''; + my $inclext= ''; + my $adv_search_link = + ''.&mt('Advanced Search').''; + # + $scrout.='
'. + ''. + $hidden_fields; + # + $scrout .= '
'.$/; + if ($env{'request.course.id'}) { + $scrout .= '

'.&mt('LON-CAPA Catalog Search').'

'; + } else { + # No need to tell them they are searching + $scrout.= ('
'x2); + } + $scrout.=''. + ''. + ''. + ''.$/; + # + $scrout .= ''.$/; + $scrout .= '
'. + &Apache::lonhtmlcommon::textbox('basicexp', + $env{'form.basicexp'},50). + '
'. + ''.&searchhelp().''.'		'. + ''.(' 'x3).$adv_search_link.''.'
'. + ''.(' 'x1).$userelatedwords.''.'
'. + ''.(' 'x1).$onlysearchdomain.''.'
'. + ''.(' 'x1).$inclext.''.'
'. + '
'. + ''. + ''. + (' 'x2).$closebutton.(' 'x2). + &viewoptions(). + ''. + '
'.$/.'
'.'
'; + } + if ($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)', + 'disc' => 'search discussion postings (resources and bulletin boards)', + ); + $scrout.=(< +
+
+

$lt{'header'}

+ +$hidden_fields

-LIMIT BY CREATION DATE RANGE: - -
-between: - - -and: - - +$lt{'note'}.

-CREATIONDATEEND - - $scrout.=< -LIMIT BY LAST REVISION DATE RANGE: - -
between: - - -and: - - + + + + + +
+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'}); + my $discheckbox = + &Apache::lonhtmlcommon::checkbox('crsdiscuss', + $env{'form.crsrelated'}); + $scrout.=(<

+ 

-LASTREVISIONDATEEND +
+ +ENDENDCOURSE + } + $scrout .= &Apache::loncommon::end_page(); + $r->print($scrout); + return; +} +###################################################################### +###################################################################### - $scrout.=&searchphrasefield('Limit by publisher/owner','owner', - $metadatafields{'owner'}); +=pod - $scrout.=&selectbox('Limit by copyright/distribution','copyright', - 'any',%cprtag); +=item &advanced_search_form() -# ---------------------------------------------------------------- Print screen - $r->print(< - -The LearningOnline Network with CAPA - - - - -

Search Catalog

-
-
-

Basic Search

-

- -

-

-Enter terms or phrases separated by search operators -such as AND or OR then press SEARCH below. Terms should be specific -to the title, author, subject, notes, or abstract information associated -with a resource. -
- - -Title only -
- -

-
-

Advanced Search

-$scrout +END + + my $start_page = &Apache::loncommon::start_page('Results',$js, + {'only_body' => 1}); + my $breadcrumbs= + &Apache::lonhtmlcommon::breadcrumbs('Searching','Searching', + $env{'form.catalogmode'} ne 'import'); + + my $result = < + + +END + +#

Sort Results

+#Sort by: +There are $total_results matches to your query. $revise +

+Search:$pretty_query_string

- - -ENDDOCUMENT - return OK; -} +END + $r->print($result.&Apache::loncommon::end_page()); + 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 $table; + } + return undef; # Error... +} -# --------------------------------------------------------- Various form fields +###################################################################### +###################################################################### -sub textfield { - my ($title,$name,$value)=@_; - return "\n

$title:
". - ''; -} - -sub searchphrasefield { - my ($title,$name,$value)=@_; - my $instruction=<$uctitle:". - ": $instruction
". - ''; -} - -sub selectbox { - my ($title,$name,$value,%options)=@_; - my $uctitle=uc($title); - my $selout="\n

$uctitle:". - "
".''; -} - -# --------------------------------------------------- Performing a basic search -sub basicsearch { - my ($r,$expression)=@_; - - my $query=$expression; -# $query="select * from metadata where concat(title,':\@:',author) like '\%Sci\%'"; - $query="select * from metadata where concat(title,\" \",author) like '\%$expression\%'"; -# my $reply=&Apache::lonnet::reply("querysend:DESCRIBE metadata","msul3"); - my $reply=&Apache::lonnet::reply("querysend:$query",'msul3'); -# my $reply=&Apache::lonnet::reply('querysend:select * from metadata','msul3'); - - my @results; - - my $replyfile=''; - $reply=~/^([\.\w]+)$/; # must do since 'use strict' checks for tainting - $replyfile=$r->dir_config('lonDaemons').'/tmp/'.$1; - $reply=~/(.*?)\_/; - my $hostname=$1; - - { - while (1) { - last if -e $replyfile; - sleep 1; +=pod + +=item Search Status update functions + +Each of the following functions changes the values of one of the +input fields used to display the search status to the user. The names +should be explanatory. + +Inputs: Apache request handler ($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 + ("\n"); + $r->rflush(); +} + +sub update_status { + my ($r,$text) = @_; + $text =~ s/\'/\\\'/g; + $r->print + ("\n"); + $r->rflush(); +} + +{ + my $max_time = 300; # 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("\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{ }; + 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 $connection = $r->connection; + # + # Print run_search header + # + my $start_page = &Apache::loncommon::start_page('Search Status',undef, + {'only_body' => 1}); + my $breadcrumbs = + &Apache::lonhtmlcommon::breadcrumbs('Searching','Searching', + $env{'form.catalogmode'} ne 'import'); + $r->print(< + +END + # Remove leading and trailing
+ $pretty_string =~ s:^\s*
::i; + $pretty_string =~ s:(
)*\s*$::im; + my @Lines = split("
",$pretty_string); + # I keep getting blank items at the end of the list, hence the following: + while ($Lines[-1] =~ /^\s*$/ && @Lines) { + pop(@Lines); + } + if (@Lines > 2) { + $pretty_string = join '
',(@Lines[0..2],'....
'); + } + $r->print(&mt("Search: [_1]",$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.". + &Apache::loncommon::end_page()); + return; + } + my $table_status = &Apache::lonmysql::check_table($table); + if (! defined($table_status)) { + $r->print("Unable to determine status of table.". + &Apache::loncommon::end_page()); + &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.". + &Apache::loncommon::end_page()); + return; + } + ## + ## Prepare for the big loop. + my $hitcountsum; + my $server; + my $status; + my $revise = &revise_button(); + $r->print(< +StatusTotal MatchesTime Remaining + + + + +$revise + + + +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. + foreach my $server (keys(%Server_status)) { + last if ($connection->aborted()); + &update_seconds($r); + my $status = $Server_status{$server}; + if ($status eq 'con_lost') { + delete ($Server_status{$server}); + next; + } + $status=~s|/||g; + my $datafile=$r->dir_config('lonDaemons').'/tmp/'.$status; + 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 if external and we did not want that + next if ((! $env{'form.inclext'}) && ($Fields{'url'}=~/^\/ext\//)); + # 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 + $r->print(&Apache::loncommon::end_page()); +# if ($env{'form.catalogmode'} ne 'import') { + $r->print(""); +# } + return; +} + +###################################################################### +###################################################################### + +=pod + +=item &prev_next_buttons() + +Returns html for the previous and next buttons on the search results page. + +=cut + +###################################################################### +###################################################################### +sub prev_next_buttons { + my ($current_min,$show,$total,$parms) = @_; + return '' if ($show eq 'all'); # No links if you get them all at once. + # + # Create buttons + my $buttons = ''; + $buttons .= ' 'x3; + $buttons .= '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=import. + my $checkbox_num = 0; + ## + ## Get the catalog controls setup + ## + my $action = "/adm/searchcat?phase=results"; + ## + ## Deal with import by opening the import db file. + if ($env{'form.catalogmode'} eq 'import') { + if (! tie(%groupsearch_db,'GDBM_File',$diropendb, + &GDBM_WRCREAT(),0640)) { + $r->print('Unable to store import results.'. + &Apache::loncommon::end_page()); + $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)) { + $r->print("A MySQL error has occurred.". + &Apache::loncommon::end_page()); + &Apache::lonnet::logthis("lonmysql was unable to determine the number". + " of rows in table ".$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') + ); + # + # Build sorting selector + my @fields = + ( + {key=>'default' }, + {key=>'title' }, + {key =>'author' }, + {key =>'subject'}, + {key =>'url',desc=>'URL'}, + {key =>'keywords'}, + {key =>'language'}, + {key =>'creationdate'}, + {key =>'lastrevisiondate'}, + {key =>'owner'}, + {key =>'copyright'}, + {key =>'authorspace'}, + {key =>'lowestgradelevel'}, + {key =>'highestgradelevel'}, + {key =>'standards',desc=>'Standards'}, + {key =>'count',desc=>'Number of accesses'}, + {key =>'stdno',desc=>'Students Attempting'}, + {key =>'avetries',desc=>'Average Number of Tries'}, + {key =>'difficulty',desc=>'Mean Degree of Difficulty'}, + {key =>'disc',desc=>'Mean Degree of Discrimination'}, + {key =>'clear',desc=>'Evaluation: Clear'}, + {key =>'technical',desc=>'Evaluation: Technically Correct'}, + {key =>'correct',desc=>'Evaluation: Material is Correct'}, + {key =>'helpful',desc=>'Evaluation: Material is Helpful'}, + {key =>'depth',desc=>'Evaluation: Material has Depth'}, + ); + my %fieldnames = &Apache::lonmeta::fieldnames(); + my @field_order; + foreach my $field_data (@fields) { + push(@field_order,$field_data->{'key'}); + if (! exists($field_data->{'desc'})) { + $field_data->{'desc'}=$fieldnames{$field_data->{'key'}}; + } else { + if (! defined($field_data->{'desc'})) { + $field_data->{'desc'} = ucfirst($field_data->{'key'}); + } + $field_data->{'desc'} = &mt($field_data->{'desc'}); + } + } + my %sort_fields = map {$_->{'key'},$_->{'desc'}} @fields; + $sort_fields{'select_form_order'} = \@field_order; + $env{'form.sortorder'} = 'desc' if (! exists($env{'form.sortorder'})); + $env{'form.sortfield'} = 'count' if (! exists($env{'form.sortfield'})); + if (! exists($env{'form.sortorder'})) { + if ($env{'form.sortfield'}=~/^(count|stdno|disc|clear|technical|correct|helpful)$/) { + $env{'form.sortorder'}='desc'; + } else { + $env{'form.sortorder'}='asc'; } - # QUESTION: how should I handle this error condition.. - # I'm sure there is syntax elsewhere I can use.. - my $fh=Apache::File->new($replyfile) or - ($r->print('file cannot be opened') and return OK); - @results=<$fh>; } + my $sortform = &mt('Sort by [_1] [_2]', + &Apache::loncommon::select_form($env{'form.sortfield'}, + 'sortfield', + %sort_fields), + &Apache::loncommon::select_form($env{'form.sortorder'}, + 'sortorder', + (asc =>&mt('Ascending'), + desc=>&mt('Descending') + )) + ); + ## + ## Output links (if necessary) for 'prev' and 'next' pages. + $r->print + ('
'. + ''.$sortform.''. + ''. + &prev_next_buttons($min,$env{'form.show'},$total_results). + ''. + &viewoptions().'
' + ); + if ($total_results == 0) { + $r->print(''. + '

'.&mt('There are currently no results').'.

'. + "". + &Apache::loncommon::end_page()); + return; + } else { + $r->print('
'. + mt('Results [_1] to [_2] out of [_3]', + $min,$max,$total_results). + "
\n"); + } + ## + ## Get results from MySQL table + my $sort_command = 'id>='.$min.' AND id<='.$max; + my $order; + if (exists($env{'form.sortorder'})) { + if ($env{'form.sortorder'} eq 'asc') { + $order = 'ASC'; + } elsif ($env{'form.sortorder'} eq 'desc') { + $order = 'DESC'; + } else { + $order = ''; + } + } else { + $order = ''; + } + if ($env{'form.sortfield'} ne 'default' && + exists($sort_fields{$env{'form.sortfield'}})) { + $sort_command = $env{'form.sortfield'}.' IS NOT NULL '. + 'ORDER BY '.$env{'form.sortfield'}.' '.$order. + ' LIMIT '.($min-1).','.($max-$min+1); + } + my @Results = &Apache::lonmysql::get_rows($table,$sort_command); + ## + ## Loop through the results and output them. + foreach my $row (@Results) { + if ($connection->aborted()) { + &cleanup(); + return; + } + my %Fields = %{&parse_row(@$row)}; + my $output="

\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 + ('

'. + &prev_next_buttons($min,$env{'form.show'},$total_results, + "table=".$env{'form.table'}. + "&phase=results". + "&persistent_db_id=". + $env{'form.persistent_db_id'}) + ."
\n" + ); + } + $r->print("".&Apache::loncommon::end_page()); + $r->rflush(); + untie %groupsearch_db if (tied(%groupsearch_db)); + return; +} + +###################################################################### +###################################################################### - my $compiledresult=''; +=pod +=item &catalogmode_output($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') { + $output.=< + +END + } + } elsif ($env{'form.catalogmode'} eq 'import') { + $groupsearch_db{"pre_${fnum}_link"}=$url; + $groupsearch_db{"pre_${fnum}_title"}=$title; + $output.=< + + +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[$i]->{'name'}}=&unescape($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 { + &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'}; + $customshow=~s/[^\w\s]//g; + my @fields=map { + "$_:"; + } split(/\s+/,$customshow); + @customfields=split(/\s+/,$customshow); + if ($customshow) { + $extrashow="
  • ".join("
  • ",@fields)."
\n"; + } + } + my $customdata=''; + my %customhash; foreach my $result (@results) { - my ($title,$author,$subject,$notes,$abstract,$mime,$lang, - $creationdate,$lastrevisiondate,$owner,$copyright - )=map {&Apache::lonnet::unescape($_)} (split(/\,/,$result)); - my $shortabstract=$abstract; - $shortabstract=substr($abstract,0,200) if length($abstract)>200; - $compiledresult=< -Title: $title
-Author(s): $author
-Subject: $subject
-Keyword(s): not available yet
-Notes: $notes
-Abstract: $shortabstract
-MIME Type: $mimetag{$mime}
-Language: $language{$lang}
-Creation Date: $creationdate
-Last Revision Date: $lastrevisiondate
-Publisher/Owner: $owner
-Copyright/Distribution: $copyright
-Repository Location: $hostname + if ($result=~/^(custom\=.*)$/) { # grab all custom metadata + my $tmp=$result; + $tmp=~s/^custom\=//; + my ($k,$v)=map {&unescape($_); + } 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 $mode is either (at this writing) 'Basic' or 'Advanced' + +=back + +The following environment variables are checked: + +=over 4 + +=item 'form.catalogmode' + +Checked for 'interactive' and 'import'. + +=item 'form.mode' + +Checked for existance & 'edit' mode. + +=item 'form.form' + +Contains the name of the form that has the input fields to set + +=item 'form.element' + +the name of the input field to put the URL into + +=item 'form.titleelement' + +the name of the input field to put the title into + +=back + +=cut + +###################################################################### +###################################################################### +sub search_results_header { + my ($importbutton,$closebutton) = @_; + + my $js; + # output beginning of search page + # conditional output of script functions dependent on the mode in + # which the search was invoked + if ($env{'form.catalogmode'} eq 'interactive'){ + if (! exists($env{'form.mode'}) || $env{'form.mode'} ne 'edit') { + $js.=< + function select_data(title,url) { + changeTitle(title); + changeURL(url); + parent.close(); + } + function changeTitle(val) { + if (parent.opener.inf.document.forms.resinfo.elements.t) { + parent.opener.inf.document.forms.resinfo.elements.t.value=val; + } + } + function changeURL(val) { + if (parent.opener.inf.document.forms.resinfo.elements.u) { + parent.opener.inf.document.forms.resinfo.elements.u.value=val; + } + } + +SCRIPT + } elsif ($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 { + $changetitle=< +function select_data(title,url) { + changeURL(url); + changeTitle(title); + parent.close(); +} +$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 + } + } + $js.=< +SCRIPT + + my $start_page = &Apache::loncommon::start_page(undef,$js, + {'only_body' =>1}); + my $result=< +$importbutton +END + return $result; +} + +###################################################################### +###################################################################### +sub search_status_header { + my $start_page = &Apache::loncommon::start_page('Search Status',undef, + {'only_body' => 1}); + return <Search Status +Sending search request to LON-CAPA servers.
+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 $js = < +var targetwin = opener; +var queue = ''; + +JS + + my $start_page = + &Apache::loncommon::start_page('LON-CAPA Digital Library Search Results', + $js, + {'frameset' => 1, + 'add_entries' => { + 'rows' => "150,*",},}); + my $end_page = + &Apache::loncommon::end_page({'frameset' => 1}); + + my $result = <<"ENDFRAMES"; +$start_page + + +$end_page +ENDFRAMES + + $r->print($result); + return; +} + +###################################################################### +###################################################################### + +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'}) && $values->{'depth'} ne '')) { + return 1; + } + return 0; +} + +sub evalfields { + return ('clear','technical','correct','helpful','depth'); +} + +###################################################################### +###################################################################### + +=pod + +=item Metadata Viewing Functions + +Output is a HTML-ified string. + +Input arguments are title, author, subject, url, keywords, version, +notes, short abstract, mime, language, creation date, +last revision date, owner, copyright, hostname, and +extra custom metadata to show. + +=over 4 + +=item &detailed_citation_view() + +=cut + +###################################################################### +###################################################################### +sub detailed_citation_view { + my ($prefix,%values) = @_; + my $result; + my $jumpurl=$values{'url'}; + $jumpurl=~s/^\/ext\//http\:\/\//; + $result .= ''.$prefix. + ''.' '. + ''.$values{'title'}."\n"; + $result .= "

\n"; + $result .= ''.$values{'author'}.','. + ' '.$values{'owner'}.'
'; + foreach my $field + ( + { name=>'url', + translate => 'URL: [_1]', + special => 'url link',}, + { name=>'subject', + translate => 'Subject: [_1]',}, + { name=>'keywords', + translate => 'Keywords: [_1]',}, + { name=>'notes', + translate => 'Notes: [_1]',}, + { name=>'mimetag', + translate => 'MIME Type: [_1]',}, + { name=>'standards', + translate => 'Standards:[_1]',}, + { name=>'copyrighttag', + translate => 'Copyright/Distribution: [_1]',}, + { name=>'count', + format => "%d", + translate => 'Access Count: [_1]',}, + { name=>'stdno', + format => "%d", + translate => 'Number of Students: [_1]',}, + { name=>'avetries', + format => "%.2f", + translate => 'Average Tries: [_1]',}, + { name=>'disc', + format => "%.2f", + translate => 'Degree of Discrimination: [_1]',}, + { name=>'difficulty', + format => "%.2f", + translate => 'Degree of Difficulty: [_1]',}, + { name=>'clear', + format => "%.2f", + translate => 'Clear: [_1]',}, + { name=>'depth', + format => "%.2f", + translate => 'Depth: [_1]',}, + { name=>'helpful', + format => "%.2f", + translate => 'Helpful: [_1]',}, + { name=>'correct', + format => "%.2f", + translate => 'Correct: [_1]',}, + { name=>'technical', + format => "%.2f", + translate => 'Technical: [_1]',}, + { name=>'comefrom_list', + type => 'list', + translate => 'Resources that lead up to this resource in maps',}, + { name=>'goto_list', + type => 'list', + translate => 'Resources that follow this resource in maps',}, + { name=>'sequsage_list', + type => 'list', + translate => 'Resources using or importing resource',}, + ) { + next if (! exists($values{$field->{'name'}}) || + $values{$field->{'name'}} eq ''); + if (exists($field->{'type'}) && $field->{'type'} eq 'list') { + $result .= ''.&mt($field->{'translate'}).''; + foreach my $item (split(',',$values{$field->{'name'}})){ + $result .= + &Apache::lonhtmlcommon::crumbs($item, + (($env{'form.catalogmode'} eq 'import')?'_top':'preview'), + '/res', + (($env{'form.catalogmode'} eq 'import')?'parent.statusframe.document.forms.statusform':''),1); + } + } elsif (exists($field->{'format'}) && $field->{'format'} ne ''){ + $result.= &mt($field->{'translate'}, + sprintf($field->{'format'}, + $values{$field->{'name'}}))."
\n"; + } else { + if ($field->{'special'} eq 'url link') { + $result.= + &Apache::lonhtmlcommon::crumbs($jumpurl, + (($env{'form.catalogmode'} eq 'import')?'_top':'preview'), + '', + (($env{'form.catalogmode'} eq 'import')?'parent.statusframe.document.forms.statusform':''),1); + } else { + $result.= &mt($field->{'translate'}, + $values{$field->{'name'}}); + } + $result .= "
\n"; + } + } + $result .= "

"; + if (exists($values{'extrashow'}) && $values{'extrashow'} ne '') { + $result .= '

'.$values{'extrashow'}.'

'; + } + if (exists($values{'shortabstract'}) && $values{'shortabstract'} ne '') { + $result .= '

'.$values{'shortabstract'}.'

'; + } + $result .= '
'."\n"; + return $result; +} + +sub detailed_citation_preview { + my ($prefix,%values)=@_; + return '
'. + &detailed_citation_view($prefix,%values). + ''. + &Apache::lonindexer::showpreview($values{'url'}). + '
'; +} + + +###################################################################### +###################################################################### + +=pod + +=item &summary_view() + +=cut +###################################################################### +###################################################################### +sub summary_view { + my ($prefix,%values) = @_; + my $icon=&Apache::loncommon::icon($values{'url'}); + my $result=qq{$prefix}; + if (exists($env{'form.sortfield'}) && + $env{'form.sortfield'} !~ /^(default| + author| + url| + title| + owner| + lastrevisiondate| + copyright)$/x) { + my $tmp = $values{$env{'form.sortfield'}}; + if (! defined($tmp)) { $tmp = 'undefined'; } + $result .= ' '.$tmp.' '; + } + my $jumpurl=$values{'url'}; + $jumpurl=~s/^\/ext\//http\:\/\//; + my $link=&Apache::lonhtmlcommon::crumbs($jumpurl, + (($env{'form.catalogmode'} eq 'import')?'_top':'preview'), + '', + (($env{'form.catalogmode'} eq 'import')?'parent.statusframe.document.forms.statusform':''),1); + + $result.=<$values{'title'}$link +$values{'author'}, $values{'owner'} -- $values{'lastrevisiondate'}
+$values{'copyrighttag'}
+$values{'extrashow'}

+
END + return $result; +} + +sub summary_preview { + my ($prefix,%values)=@_; + return '
'. + &summary_view($prefix,%values). + ''. + &Apache::lonindexer::showpreview($values{'url'}). + '
'; +} + +###################################################################### +###################################################################### + +=pod + +=item &compact_view() + +=cut + +###################################################################### +###################################################################### +sub compact_view { + my ($prefix,%values) = @_; + my $jumpurl=$values{'url'}; + $jumpurl=~s/^\/ext\//http\:\/\//; + my $link=&Apache::lonhtmlcommon::crumbs($jumpurl, + (($env{'form.catalogmode'} eq 'import')?'_top':'preview'), + '', + (($env{'form.catalogmode'} eq 'import')?'parent.statusframe.document.forms.statusform':''),1); + my $result = + $prefix.''; + if (exists($env{'form.sortfield'}) && + $env{'form.sortfield'} !~ /^(default|author|url|title)$/) { + my $tmp = $values{$env{'form.sortfield'}}; + if (! defined($tmp)) { $tmp = 'undefined'; } + $result .= ' '.$tmp.' '; + } + $result.=' '. + $values{'title'}.''.(' 'x2).$link. + ''.$values{'author'}.' ('.$values{'domain'}.')
'; + return $result; } - unless ($compiledresult) { - $compiledresult="There were no results that matched your query"; + +###################################################################### +###################################################################### + +=pod + +=item &fielded_format_view() + +=cut + +###################################################################### +###################################################################### +sub fielded_format_view { + my ($prefix,%values) = @_; + my $icon=&Apache::loncommon::icon($values{'url'}); + my %Translated = &Apache::lonmeta::fieldnames(); + my $jumpurl=$values{'url'}; + $jumpurl=~s/^\/ext\//http\:\/\//; + + my $result=< +
+
URL:
+
$values{'url'}
+END + foreach my $field ('title','author','domain','subject','keywords','notes', + 'mimetag','language','creationdate','lastrevisiondate', + 'owner','copyrighttag','hostname','abstract') { + $result .= (' 'x4).'
'.$Translated{$field}.'
'."\n". + (' 'x8).'
'.$values{$field}.'
'."\n"; + } + if (&has_stat_data(\%values)) { + foreach my $field (&statfields()) { + $result .= (' 'x4).'
'.$Translated{$field}.'
'."\n". + (' 'x8).'
'.$values{$field}.'
'."\n"; + } } + if (&has_eval_data(\%values)) { + foreach my $field (&evalfields()) { + $result .= (' 'x4).'
'.$Translated{$field}.'
'."\n". + (' 'x8).'
'.$values{$field}.'
'."\n"; + } + } + $result .= "
\n"; + $result .= $values{'extrashow'}; + $result .= '
'."\n"; + return $result; +} + +###################################################################### +###################################################################### + +=pod -# Question... allow to ask question from this page, or click to -# search again? +=item &xml_sgml_view() + +=back + +=cut + +###################################################################### +###################################################################### +sub xml_sgml_view { + my ($prefix,%values) = @_; + my $xml = ''."\n"; + # The usual suspects + foreach my $field ('url','title','author','subject','keywords','notes','domain') { + $xml .= qq{<$field>$values{$field}}."\n"; + } + # + $xml .= "\n"; + foreach my $field ('mime','mimetag') { + $xml .= qq{<$field>$values{$field}}."\n"; + } + $xml .= "\n"; + # + $xml .= "\n"; + foreach my $field ('language','languagetag') { + $xml .= qq{<$field>$values{$field}}."\n"; + } + $xml .= "\n"; + # + foreach my $field ('creationdate','lastrevisiondate','owner') { + $xml .= qq{<$field>$values{$field}}."\n"; + } + # + $xml .= "\n"; + foreach my $field ('copyright','copyrighttag') { + $xml .= qq{<$field>$values{$field}}."\n"; + } + $xml .= "\n"; + $xml .= qq{$values{'hostname'}}. + "\n"; + $xml .= qq{$values{'shortabstract'}}."\n"; + # + if (&has_stat_data(\%values)){ + $xml .= "\n"; + foreach my $field (&statfields()) { + $xml .= qq{<$field>$values{$field}}."\n"; + } + $xml .= "\n"; + } + # + if (&has_eval_data(\%values)) { + $xml .= "\n"; + foreach my $field (&evalfields) { + $xml .= qq{<$field>$values{$field}}."\n"; + } + $xml .= "\n"; + } + # + $xml .= "\n"; + $xml = &HTML::Entities::encode($xml,'<>&'); + my $result=< +$xml + +$values{'extrashow'} +
+END + return $result; +} + +###################################################################### +###################################################################### + +=pod + +=item &filled() see if field is filled. + +=cut + +###################################################################### +###################################################################### +sub filled { + my ($field)=@_; + if ($field=~/\S/ && $field ne 'any') { + return 1; + } else { + return 0; + } +} + +###################################################################### +###################################################################### + +=pod + +=item &output_unparsed_phrase_error() + +=cut + +###################################################################### +###################################################################### +sub output_unparsed_phrase_error { + my ($r,$closebutton,$parms,$hidden_fields,$field)=@_; + my $errorstring; + if ($field eq 'basicexp') { + $errorstring = &mt('Unable to understand the search phrase [_1]. Please modify your search.',$env{'form.basicexp'}); + } else { + $errorstring = &mt('Unable to understand the search phrase [_1]:[_2].',$field,$env{'form.'.$field}); + } + my $heading = &mt('Unparsed Field'); + my $revise = &mt('Revise search request'); + # make query information persistent to allow for subsequent revision + my $start_page = &Apache::loncommon::start_page('Search'); + my $end_page = &Apache::loncommon::end_page(); + $r->print(< +$hidden_fields +$closebutton +
+

$heading

+

+$errorstring +

+

+$revise +

+$end_page +ENDPAGE +} + +###################################################################### +###################################################################### + +=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 $errormsg = &mt('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.'); + my $revise = &mt('Revise Search Request'); + my $heading = &mt('Unactionable Search Queary'); + my $start_page = &Apache::loncommon::start_page('Search'); + my $end_page = &Apache::loncommon::end_page(); + $r->print(< +$hidden_fields +$closebutton +
+

$heading

+

+$errormsg +

+

+$revise  +

+$end_page +ENDPAGE + return; +} + +###################################################################### +###################################################################### + +=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 $start_page = &Apache::loncommon::start_page('Search'); + my $end_page = &Apache::loncommon::end_page(); $r->print(< - -The LearningOnline Network with CAPA - - - -

Search Catalog

+$start_page
-
-

Search Query

+$hidden_fields + +$closebutton +
+

Error

-$expression +$message

-

Search Results

-$compiledresult - - +$end_page RESULTS +} - return OK; +###################################################################### +###################################################################### + +=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(); + return OK; +} + __END__ + +=pod + +=back + +=cut