--- loncom/interface/lonsearchcat.pm 2001/03/12 17:28:32 1.7 +++ loncom/interface/lonsearchcat.pm 2013/01/07 22:20:58 1.331.4.4 @@ -1,810 +1,3755 @@ -# The LearningOnline Network +# The LearningOnline Network with CAPA # Search Catalog # -# 03/08/2001 Scott Harrison +# $Id: lonsearchcat.pm,v 1.331.4.4 2013/01/07 22:20:58 raeburn 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 Apache::lonwishlist(); +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 $closebutton; # button that closes the search window + # This button is different for the RAT compared to + # normal invocation. + # + &Apache::loncommon::content_type($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($ENV{'QUERY_STRING'}, + ['catalogmode','launch','acts','mode','form','element','pause', + 'phase','persistent_db_id','table','start','show', + 'cleargroupsort','titleelement','area','inhibitmenu']); + ## + ## The following is a trick - we wait a few seconds if asked to so + ## the daemon running the search can get ahead of the daemon + ## printing the results. We only need (theoretically) to do + ## this once, so the pause indicator is deleted + ## + if (exists($env{'form.pause'})) { + sleep(1); + delete($env{'form.pause'}); + } + ## + ## Initialize global variables + ## + my $domain = $r->dir_config('lonDefDomain'); + my $temp_file_dir = LONCAPA::tempdir(); + $diropendb= $temp_file_dir . + "$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; + } + + my $persistent_db_file = $temp_file_dir . + &escape($domain). + '_'.&escape($env{'user.name'}). + '_'.$env{'form.persistent_db_id'}.'_persistent_search.db'; + ## + &Apache::lonhtmlcommon::clear_breadcrumbs(); + + my @allowed_searches = ('portfolio'); + if (&Apache::lonnet::allowed('bre',$env{'request.role.domain'})) { + push(@allowed_searches,'res'); + } + my $crumb_text = 'Portfolio Search'; + if (@allowed_searches ==2) { + $crumb_text = 'Portfolio and Catalog Search'; + } + &Apache::lonhtmlcommon::add_breadcrumb + ({href=>'/adm/searchcat?'. + &Apache::loncommon::inhibit_menu_check(). + '&catalogmode='.$env{'form.catalogmode'}. + '&launch='.$env{'form.launch'}. + '&mode='.$env{'form.mode'}, + text=>"$crumb_text", + target=>'_top', + bug=>'Searching',}); + # + if ($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'})) { + $hidden_fields .= &hidden_field('mode'); + } + if (exists($env{'form.area'})) { + $hidden_fields .= &hidden_field('area'); + } + if (exists($env{'form.inhibitmenu'})) { + $hidden_fields .= &hidden_field('inhibitmenu'); + } + ## + ## Configure dynamic components of interface + ## + if ($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') { + $env{'form.searchmode'} = 'advanced'; + } + # + if ($env{'form.searchmode'} eq 'advanced') { + my $srchtype = 'Catalog'; + if ($env{'form.area'} eq 'portfolio') { + $srchtype = 'Portfolio'; + } + &Apache::lonhtmlcommon::add_breadcrumb + ({href=>'/adm/searchcat?'.&Apache::loncommon::inhibit_menu_check(). + '&phase=disp_adv'. + '&catalogmode='.$env{'form.catalogmode'}. + '&launch='.$env{'form.launch'}. + '&mode='.$env{'form.mode'}, + text=>"Advanced $srchtype Search", + bug=>'Searching',}); + } + ## + ## Switch on the phase + ## + if ($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, + $env{'form.area'}); + } elsif ($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,$env{'form.area'}); + } + } elsif(($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 }, + $persistent_db_file); + # + # Set up table + if (! defined(&create_results_table($env{'form.area'}))) { + my $errorstring=&Apache::lonmysql::get_error(); + &Apache::lonnet::logthis('lonsearchcat.pm: Unable to create '. + 'needed table. lonmysql error:'. + $errorstring); + + my $msg = + 'Unable to create table in which to save search results. '. + 'The search has been aborted.'; + &Apache::loncommon::simple_error_page($r,'Search Error', + $msg); + return OK; + } + delete($env{'form.launch'}); + if (! &make_form_data_persistent($r,$persistent_db_file)) { + my $msg= + 'Unable to properly save search information. '. + 'The search has been aborted.'; + &Apache::loncommon::simple_error_page($r,'Search Error', + $msg); + return OK; + } + ## + ## Print out the frames interface + ## + if (defined($query)) { + &print_frames_interface($r); + } + } + return OK; +} + +# +# The mechanism used to store values away and retrieve them does not +# handle the case of missing environment variables being significant. +# +# This routine sets non existant checkbox form elements to ''. +# +sub clean_up_environment { + if ($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 ''.$/; +} + +###################################################################### + +=pod + +=item &print_basic_search_form() + +Prints the form for the basic search. Sorry the name is so cryptic. + +=cut + +###################################################################### +###################################################################### +sub print_basic_search_form { + my ($r,$closebutton,$hidden_fields) = @_; + my $result = ($env{'form.catalogmode'} ne 'import'); + my $bread_crumb = + &Apache::lonhtmlcommon::breadcrumbs('Searching','Search_Basic', + $env{'form.catalogmode'} ne 'import'); + my $scrout = &Apache::loncommon::start_page('Content Library').$bread_crumb; +# Search form for resource space + if (&Apache::lonnet::allowed('bre',$env{'request.role.domain'})) { + $scrout .= &setup_basic_search($r,'res',$hidden_fields,$closebutton); + $scrout .= '
+ + +$closebutton +
+END + my $srchtype = 'Catalog'; + my $jscript; + if ($env{'form.area'} eq 'portfolio') { + $srchtype = 'Portfolio'; + $jscript = ''; + } + my $scrout= &Apache::loncommon::start_page("Advanced $srchtype Search", + $jscript); + $scrout .= $bread_crumb; + + $scrout .= ''; + + $scrout .= &Apache::loncommon::end_page(); + $r->print($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', + 'summarypreview' => 'Summary Preview', + 'detailedpreview' => 'Detailed Citation Preview'); + 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 .= '' + .&mt('Type:').' ' + .&Apache::lonmeta::selectbox('viewselect', + $env{'form.viewselect'}, + \&viewoptiontext, + sort(keys(%Views))) + .''; + my $countselect = &Apache::lonmeta::selectbox('show', + $env{'form.show'}, + undef, + (10,20,50,100,1000,10000)); + $scrout .= ' ' + .&mt('Records per Page:').' '.$countselect + .''.$/; + return $scrout; +} + +###################################################################### +###################################################################### - %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>; +=pod + +=item searchhelp() + +Inputs: none + +Outputs: return little blurb on how to enter searches + +=cut + +###################################################################### +###################################################################### +sub searchhelp { + return &mt('Enter words and quoted phrases'); +} + +###################################################################### +###################################################################### + +=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{$name})); + my @values = map { + &unescape($_); + } 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; +} + +###################################################################### +###################################################################### - %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>; +=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{$name})) { + push @Values, undef; + next; + } + my @values = map { + &unescape($_); + } split(',',$persistent_db{$name}); + if (@values <= 1) { + push @Values,$values[0]; + } else { + push @Values,\@values; + } } + untie (%persistent_db); + return @Values; +} - if ($ENV{'form.basicsubmit'} eq 'SEARCH') { - return &basicsearch($r,$ENV{'form.basicexp'}); +###################################################################### +###################################################################### + +=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 $store = join(',', map { &escape($_); } @values ); + $persistent_db{$name} = $store; } + untie(%persistent_db); + return 1; +} - $scrout=""; - $scrout.=&searchphrasefield('Limit by title','title', - ''); +###################################################################### +###################################################################### - $scrout.=&searchphrasefield('Limit by author','author', - ''); +=pod - $scrout.=&searchphrasefield('Limit by subject','subject', - ''); +=item &make_form_data_persistent() - $scrout.=&searchphrasefield('Limit by notes','notes', - ''); +Inputs: filename of persistent database. - $scrout.=&searchphrasefield('Limit by abstract','abstract', - ''); +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. - $scrout.=&selectbox('Limit by MIME type','mime', - 'notxxx',%mimetag); +=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); +} - $scrout.=&selectbox('Limit by language','language', - 'any',%language); +###################################################################### +###################################################################### + +=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','authorspace', +# 'custommetadata','customshow', + 'modifyinguser','standards','mime'); + my @StatsFields = &statfields(); + my @EvalFields = &evalfields(); + my $fillflag=0; + my $pretty_search_string = ""; + # 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; + } + foreach ('mode','form','element') { + # is this required? Hmmm. + next if (! exists($env{'form.'.$_})); + $env{'form.'.$_}=&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) { + $fillflag++; + } + } + if ($env{'form.area'} eq 'portfolio') { + # Added metadata fields + for (my $i=0; $i<$env{'form.numaddedfields'} ; $i++) { + my $field = $env{'form.addedfield_'.$i}; + $field =~ s/^\s*(\S*)\s*$/$1/; + $field =~ s/\W/_/g; + if ($field ne '') { + $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 = ''; + # Evaluate logical expression AND/OR/NOT phrase fields. + foreach my $field (@BasicFields) { + next if (!defined($env{'form.'.$field}) || $env{'form.'.$field} eq ''); + my ($error,$SQLQuery) = + &process_phrase_input($env{'form.'.$field}, + $env{'form.'.$field.'_related'},$field); + if (defined($error)) { + &output_unparsed_phrase_error($r,$closebutton,'phase=disp_adv', + $hidden_fields,$field); + return; + } else { + $pretty_search_string .= + $font.$field.': '.$env{'form.'.$field}; + if ($env{'form.'.$field.'_related'}) { + my @Words = + &Apache::loncommon::get_related_words + ($env{'form.'.$field}); + if (@Words) { + $pretty_search_string.= ' with related words: '. + join(', ',@Words[0..4]); + } else { + $pretty_search_string.= ' with related words.'; + } + } + $pretty_search_string .= 'table: |'.$table.'|
' # SB + .'' + .&mt('Unable to retrieve search results. ' + .'Unable to determine the table results were saved in.') + .&Apache::loncommon::end_page() + ); + 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( + '
' + .&mt('Unable to connect to the MySQL database where your results are saved.') + .'
' + .&Apache::loncommon::end_page() + ); + &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)) { + $r->print( + '' + .&mt('A MySQL error has occurred.') + .'
' + .&Apache::loncommon::end_page()); + &Apache::lonnet::logthis("lonmysql was unable to determine the status". + " of table ".$table); + return undef; + } elsif (! $table_check) { + $r->print( + '' + .&mt('The table of results could not be found.') + .'
' + ); + &Apache::lonnet::logthis("The user requested a table, ".$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 %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)) { + $r->print("A MySQL error has occurred.". + &Apache::loncommon::end_page()); + &Apache::lonnet::logthis("lonmysql was unable to determine the number". + " of rows in table ".$table); + &Apache::lonnet::logthis(&Apache::lonmysql::get_error()); + return; + } + my $js =<' + .&mt('There are [_1] matches to your query.',$total_results) + .' '.$revise.'
' + .''.&mt('Search: ').$pretty_query_string + .'
'; + $r->print($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; - $scrout.=<' + .'' + .' ' + .'' + .' ' + .'' + .'
'; +} + +###################################################################### +###################################################################### + +=pod + +=item &display_results() + +Prints the results out for selection and perusal. + +=cut + +###################################################################### +###################################################################### +sub display_results { + my ($r,$importbutton,$closebutton,$diropendb,$area) = @_; + 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('' + .&mt('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(''. + &mt('Unable to save 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)) { + $r->print(''. + &mt('A MySQL error has occurred.'). + '
'. + ''. + &Apache::loncommon::end_page()); + &Apache::lonnet::logthis("lonmysql was unable to determine the number". + " of rows in table ".$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 + $r->print(&hidden_field('table'). + &hidden_field('phase'). + &hidden_field('persistent_db_id'). + &hidden_field('start'). + &hidden_field('area') + ); + # + # Build sorting selector + my @fields = + ( + {key=>'default' }, + {key=>'title' }, + {key =>'author' }, + {key =>'subject'}, + {key =>'url',desc=>'URL'}, + {key =>'keywords'}, + {key =>'language'}, + {key =>'creationdate'}, + {key =>'lastrevisiondate'}, + {key =>'owner'}, + {key =>'copyright'}, + {key =>'authorspace'}, + {key =>'lowestgradelevel'}, + {key =>'highestgradelevel'}, + {key =>'standards',desc=>'Standards'}, + ); + if ($area eq 'portfolio') { + push(@fields, + ( + {key => 'scope'}, + {key => 'keynum'}, + )); + } else { + push(@fields, + ( + {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'})); + if (! exists($env{'form.sortfield'})) { + if ($area eq 'portfolio') { + $env{'form.sortfield'} = 'owner'; + } else { + $env{'form.sortfield'} = 'count'; + } + } + if (! exists($env{'form.sortorder'})) { + if ($env{'form.sortfield'}=~/^(count|stdno|disc|clear|technical|correct|helpful)$/) { + $env{'form.sortorder'}='desc'; + } else { + $env{'form.sortorder'}='asc'; + } + } + my $sortform = '' + .&mt('Sort by:').' ' + .&Apache::loncommon::select_form($env{'form.sortfield'}, + 'sortfield', + \%sort_fields) + .' ' + .&Apache::loncommon::select_form($env{'form.sortorder'}, + 'sortorder', + {asc =>&mt('Ascending'), + desc=>&mt('Descending') + }) + .''; + ## + ## Display links for 'prev' and 'next' pages (if necessary) and Display Options + $r->print('' + .&prev_next_buttons($min,$env{'form.show'},$total_results) + ); + + if ($total_results == 0) { + $r->print(''. + ''.&mt('There are currently no results.').'
'. + "". + &Apache::loncommon::end_page()); + return; + } else { + $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'}) + ); + } + $r->print("".&Apache::loncommon::end_page()); + $r->rflush(); + untie %groupsearch_db if (tied(%groupsearch_db)); + return; +} + +###################################################################### +###################################################################### + +=pod + +=item &catalogmode_output($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') { + $output.=<\n".
+ ''.$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'}})){
+ $item = &Apache::lonnet::clutter($item);
+ $result .= '
'.&display_url($item,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') {
+ $result .= '
'.&display_url($jumpurl,1).'
';
+ } else {
+ $result.= &mt($field->{'translate'},
+ $values{$field->{'name'}});
+ }
+ $result .= "
\n";
+ }
+ }
+ $result .= "
'.$values{'extrashow'}.'
'; + } + if (exists($values{'shortabstract'}) && $values{'shortabstract'} ne '') { + $result .= ''.$values{'shortabstract'}.'
'; + } + return $result; +} + +sub detailed_citation_preview { + my ($prefix,%values)=@_; + return &detailed_citation_view($prefix,%values). + '- -
-
-Enter terms or phrases separated by search operators
-such as AND or OR then press SEARCH below. Terms should be specific
-to the title, author, subject, notes, or abstract information associated
-with a resource.
-
-
-
-Title only
-
-
+$hidden_fields
+$closebutton
+
+$errorstring
-- +$revise
- - -