--- loncom/interface/lonsearchcat.pm 2001/11/28 19:26:20 1.106 +++ loncom/interface/lonsearchcat.pm 2002/06/27 14:46:00 1.132 @@ -1,24 +1,80 @@ # The LearningOnline Network with CAPA -# # Search Catalog # +# $Id: lonsearchcat.pm,v 1.132 2002/06/27 14:46:00 matthew Exp $ +# +# Copyright Michigan State University Board of Trustees +# +# This file is part of the LearningOnline Network with CAPA (LON-CAPA). +# +# LON-CAPA is free software; you can redistribute it and/or modify +# it under the terms of the GNU General Public License as published by +# the Free Software Foundation; either version 2 of the License, or +# (at your option) any later version. +# +# LON-CAPA is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. +# +# You should have received a copy of the GNU General Public License +# along with LON-CAPA; if not, write to the Free Software +# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA +# +# /home/httpd/html/adm/gpl.txt +# +# http://www.lon-capa.org/ +# # YEAR=2001 # 3/8, 3/12, 3/13, 3/14, 3/15, 3/19 Scott Harrison # 3/20, 3/21, 3/22, 3/26, 3/27, 4/2, 8/15, 8/24, 8/25 Scott Harrison -# 10/12,10/14,10/15,10/16,11/28 Scott Harrison +# 10/12,10/14,10/15,10/16,11/28,11/29,12/10,12/12,12/16 Scott Harrison +# YEAR=2002 +# 1/17 Scott Harrison +# 6/17 Matthew Hall # -# $Id: lonsearchcat.pm,v 1.106 2001/11/28 19:26:20 harris41 Exp $ -### +############################################################################### +############################################################################### + +=pod + +=head1 NAME + +lonsearchcat + +=head1 SYNOPSIS + +Search interface to LON-CAPAs digital library + +=head1 DESCRIPTION + +This module enables searching for a distributed browseable catalog. + +This is part of the LearningOnline Network with CAPA project +described at http://www.lon-capa.org. + +lonsearchcat presents the user with an interface to search the LON-CAPA +digital library. lonsearchcat also initiates the execution of a search +by sending the search parameters to LON-CAPA servers. The progress of +search (on a server basis) is displayed to the user in a seperate window. + +=head1 Internals + +=over 4 + +=cut + +############################################################################### +############################################################################### ############################################################################### ## ## ## ORGANIZATION OF THIS PERL MODULE ## ## ## ## 1. Modules used by this module ## -## 2. Choices for different output views (detailed, summary, xml, etc) ## -## 3. BEGIN block (to be run once after compilation) ## -## 4. Handling routine called via Apache and mod_perl ## -## 5. Other subroutines ## +## 2. Variables used throughout the module ## +## 3. handler subroutine called via Apache and mod_perl ## +## 4. Other subroutines ## ## ## ############################################################################### @@ -32,129 +88,119 @@ use Apache::File(); use CGI qw(:standard); use Text::Query; use GDBM_File; +use Apache::loncommon(); # ---------------------------------------- variables used throughout the module -# -- information holders -my %language; # holds contents of language.tab -my %cprtag; # holds contents of copyright.tab -my %mimetag; # holds contents of filetypes.tab -my %hostdomains; # matches host name to host domain -my %hostips; # matches host name to host ip -my %hitcount; # stores number of hits per host +###################################################################### +###################################################################### + +=pod + +=item Global variables + +=over 4 + +=item $closebutton + +button that closes the search window + +=item $importbutton + +button to take the selecte results and go to group sorting + +=item %hash + +The ubiquitous database hash + +=item $diropendb + +The full path to the (temporary) search database file. This is set and +used in &handler() and is also used in &output_results(). + +=back + +=cut + +###################################################################### +###################################################################### # -- dynamically rendered interface components -my $closebutton; # button that closes the search window +my $closebutton; # button that closes the search window my $importbutton; # button to take the selected results and go to group sorting # -- miscellaneous variables -my $scrout; # string that holds portions of the screen output -my $yourself; # allows for quickly limiting to oneself -my %hash; - -# ------------------------------------------ choices for different output views -# Detailed Citation View ---> sub detailed_citation_view -# Summary View ---> sub summary_view -# Fielded Format ---> sub fielded_format_view -# XML/SGML ---> sub xml_sgml_view -my $basicviewselect=< - - - - - -END -my $advancedviewselect=< - - - - - -END +my %hash; # database hash +my $diropendb = ""; # db file -# ----------------------------------------------------------------------- BEGIN -sub BEGIN { -# --------------------------------- Compute various listings of metadata values - $language{'any'}='Any language'; - { - my $fh=Apache::File->new($Apache::lonnet::perlvar{'lonTabDir'}. - '/language.tab'); - map { - $_=~/(\w+)\s+([\w\s\-]+)/; chomp; - $language{$1}=$2; - } <$fh>; - } - $cprtag{'any'}='Any copyright/distribution'; - { - my $fh=Apache::File->new($Apache::lonnet::perlvar{'lonIncludes'}. - '/copyright.tab'); - map { - $_=~/(\w+)\s+([\w\s\-]+)/; chomp; - $cprtag{$1}=$2; - } <$fh>; - } - $mimetag{'any'}='Any type'; - { - my $fh=Apache::File->new($Apache::lonnet::perlvar{'lonTabDir'}. - '/filetypes.tab'); - map { - $_=~/(\w+)\s+(\w+)\s+([\w\s\-]+)/; chomp; - $mimetag{$1}=".$1 $3"; - } <$fh>; - } - { - my $fh=Apache::File->new($Apache::lonnet::perlvar{'lonTabDir'}. - '/hosts.tab'); - map { - $_=~/(\w+?)\:(\w+?)\:(\w+?)\:(.*)/; chomp; - if ($3 eq 'library') { - $hostdomains{$1}=$2; - $hostips{$1}=$4; - } - } <$fh>; - } -} +###################################################################### +###################################################################### + +=pod + +=item &handler() - main handler invoked by httpd child + +=item Variables + +=over 4 + +=item $hidden + +holds 'hidden' html forms + +=item $scrout + +string that holds portions of the screen output + +=back -my $diropendb = ""; -my $domain = ""; +=cut -# ----------------------------- Handling routine called via Apache and mod_perl +###################################################################### +###################################################################### sub handler { my $r = shift; untie %hash; - &get_unprocessed_cgi(); $r->content_type('text/html'); $r->send_http_header; return OK if $r->header_only; - $domain = $r->dir_config('lonDefDomain'); - - $diropendb= "/home/httpd/perl/tmp/$domain\_$ENV{'user.name'}_searchcat.db"; - + my $domain = $r->dir_config('lonDefDomain'); + $diropendb= "/home/httpd/perl/tmp/".&Apache::lonnet::escape($domain). + "\_".&Apache::lonnet::escape($ENV{'user.name'})."_searchcat.db"; + + &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'}, + ['catalogmode','launch','acts','mode','form','element', + 'reqinterface']); + ## + ## Clear out old values from database + ## if ($ENV{'form.launch'} eq '1') { if (tie(%hash,'GDBM_File',$diropendb,&GDBM_WRCREAT,0640)) { &start_fresh_session(); untie %hash; - } - else { + } else { $r->print('Unable to tie hash to db '. 'file'); return OK; } } - -# ----------------------------------- configure dynamic components of interface - my $hidden=''; + ## + ## Produce some output, so people know it is working + ## + $r->print("\n"); + $r->rflush; + ## + ## Configure dynamic components of interface + ## + my $hidden; # Holds 'hidden' html forms if ($ENV{'form.catalogmode'} eq 'interactive') { $hidden="". "\n"; $closebutton=""."\n"; - } - elsif ($ENV{'form.catalogmode'} eq 'groupsearch') { + } elsif ($ENV{'form.catalogmode'} eq 'groupsearch') { $hidden=< END @@ -166,59 +212,218 @@ END onClick='javascript:select_group()'> END } + $hidden .= < + + + +END + ## + ## What are we doing? + ## + if ($ENV{'form.basicsubmit'} eq 'SEARCH') { + # Perform basic search and give results + return &basicsearch($r,$hidden); + } elsif ($ENV{'form.advancedsubmit'} eq 'SEARCH') { + # Perform advanced search and give results + return &advancedsearch($r,$hidden); + } elsif ($ENV{'form.reqinterface'} eq 'advanced') { + # Output the advanced interface + $r->print(&advanced_search_form($closebutton,$hidden)); + return OK; + } else { + # Output normal search interface + $r->print(&basic_search_form($closebutton,$hidden)); + } + return OK; +} -# ------------------------------------------------------ Determine current user - $yourself=$ENV{'user.name'}.'@'.$ENV{'user.domain'}; +###################################################################### +###################################################################### -# --- Now, depending on the interface actions, do one of three things here: -# --- 1. a basic search -# --- 2. an advanced search -# --- 3. output a search interface +=pod -# ----------------------------------- See if a search invocation should be done - if ($ENV{'form.basicsubmit'} eq 'SEARCH') { - untie %hash; return &basicsearch($r,\%ENV); - } - elsif ($ENV{'form.advancedsubmit'} eq 'SEARCH') { - untie %hash; return &advancedsearch($r,\%ENV); +=item &basic_search_form() + +Returns a scalar which holds html for the basic search form. + +=cut + +###################################################################### +###################################################################### + +sub basic_search_form{ + my ($closebutton,$hidden) = @_; + my $scrout=<<"ENDDOCUMENT"; + + +The LearningOnline Network with CAPA + + + + +

Search Catalog

+
+$hidden +

Basic Search

+

+Enter terms or phrases separated by AND, OR, or NOT +then press SEARCH below. +

+

+ +
+ENDDOCUMENT + $scrout.=' '.&simpletextfield('basicexp',$ENV{'form.basicexp'},40). + ' '; +# $scrout.=&simplecheckbox('allversions',$ENV{'form.allversions'}); +# $scrout.='Search historic archives'; + $scrout.=<Advanced Search
+

+

+   +$closebutton + + + + +

+
+ + +ENDDOCUMENT + return $scrout; +} +###################################################################### +###################################################################### -# ----------------------------- Else, begin building search interface to output - $scrout=''; # building a part of screen output - $scrout.=&searchphrasefield('Limit by title','title', - $ENV{'form.title'}); +=pod - $scrout.=&searchphrasefield('Limit by author','author', - $ENV{'form.author'}); +=item &advanced_search_form() - $scrout.=&searchphrasefield('Limit by subject','subject', - $ENV{'form.subject'}); +Returns a scalar which holds html for the advanced search form. - $scrout.=&searchphrasefield('Limit by keywords','keywords', - $ENV{'form.keywords'}); +=cut - $scrout.=&searchphrasefield('Limit by URL','url', - $ENV{'form.url'}); +###################################################################### +###################################################################### +sub advanced_search_form{ + my ($closebutton,$hidden) = @_; + my $advanced_buttons = <<"END"; +

+ + +$closebutton + +

+END + my $scrout=<<"ENDHEADER"; + + +The LearningOnline Network with CAPA + + + + +

Advanced Catalog Search

+
+Enter terms or phrases separated by search operators +such as AND, OR, or NOT.
+
+$advanced_buttons +$hidden + + + +ENDHEADER + $scrout.=&searchphrasefield('title','title', + $ENV{'form.title'}); + $scrout.=&searchphrasefield('author','author', + $ENV{'form.author'}); + $scrout.=&searchphrasefield('subject','subject', + $ENV{'form.subject'}); + $scrout.=&searchphrasefield('keywords','keywords', + $ENV{'form.keywords'}); + $scrout.=&searchphrasefield('URL','url', + $ENV{'form.url'}); # $scrout.=&searchphrasefield('Limit by version','version', # $ENV{'form.version'}); - - $scrout.=&searchphrasefield('Limit by notes','notes', + $scrout.=&searchphrasefield('notes','notes', $ENV{'form.notes'}); - - $scrout.=&searchphrasefield('Limit by abstract','abstract', + $scrout.=&searchphrasefield('abstract','abstract', $ENV{'form.abstract'}); - - $ENV{'form.mime'}='notxxx' unless length($ENV{'form.mime'}); - $scrout.=&selectbox('Limit by MIME type','mime', - $ENV{'form.mime'},%mimetag); - + # Hack - an empty table row. + $scrout.="\n"; + $scrout.=&searchphrasefield('file
extension','mime', + $ENV{'form.mime'}); + $scrout.="\n"; + $scrout.=&searchphrasefield('publisher
owner','owner', + $ENV{'form.owner'}); + $scrout.="
VIEW: + + + +
  
  
\n"; + $ENV{'form.category'}='any' unless length($ENV{'form.category'}); + $scrout.=&selectbox('File Category','category', + $ENV{'form.category'}, + 'any','Any category', + undef, + (&Apache::loncommon::filecategories())); $ENV{'form.language'}='any' unless length($ENV{'form.language'}); - + # + # Allow restriction to multiple domains. + # I make the crazy assumption that there will never be a domain 'any'. + # + my @domains =&Apache::loncommon::get_domains(); + # adjust the size of the select box + my $size = 4; + my $size = (scalar @domains < ($size - 1) ? scalar @domains + 1 : $size); + # standalone machines do not get to choose a domain to search. + if ((scalar @domains) == 1) { + $scrout .=''."\n"; + } else { + $scrout.=''. + 'DOMAINS
'. + '\n"; + } + # + # + # $scrout.=&selectbox('Limit by language','language', - $ENV{'form.language'},%language); - - + $ENV{'form.language'},'any','Any Language', + \&{Apache::loncommon::languagedescription}, + (&Apache::loncommon::languageids), + ); # ------------------------------------------------ Compute date selection boxes $scrout.=< @@ -232,16 +437,13 @@ CREATIONDATESTART $ENV{'form.creationdatestart_day'}, $ENV{'form.creationdatestart_year'}, ); - $scrout.=< LIMIT BY LAST REVISION DATE RANGE: @@ -262,14 +464,13 @@ LASTREVISIONDATEEND $ENV{'form.lastrevisiondateend_year'}, ); $scrout.='

'; - - $scrout.=&searchphrasefield('Limit by publisher/owner','owner', - $ENV{'form.owner'}); - $ENV{'form.copyright'}='any' unless length($ENV{'form.copyright'}); $scrout.=&selectbox('Limit by copyright/distribution','copyright', - $ENV{'form.copyright'},%cprtag); - + $ENV{'form.copyright'}, + 'any','Any copyright/distribution', + \&{Apache::loncommon::copyrightdescription}, + (&Apache::loncommon::copyrightids), + ); # ------------------------------------------- Compute customized metadata field $scrout.=< @@ -280,9 +481,7 @@ For resource-specific metadata, enter in Example: grandmother=75 OR grandfather=85
CUSTOMMETADATA -$scrout.=&simpletextfield('custommetadata',$ENV{'form.custommetadata'}); -$scrout.=' initial users of this system do not need to worry about this option'; - + $scrout.=&simpletextfield('custommetadata',$ENV{'form.custommetadata'}); $scrout.=< SHOW SPECIAL METADATA FIELDS: @@ -291,286 +490,236 @@ Enter in a space-separated list of speci in a fielded listing for each record result.
CUSTOMSHOW -$scrout.=&simpletextfield('customshow',$ENV{'form.customshow'}); -$scrout.=' initial users of this system do not need to worry about this option'; - -# ---------------------------------------------------------------- Print screen - $r->print(< - -The LearningOnline Network with CAPA - - - - -

Search Catalog

- -$hidden -
-

Basic Search

-

-Enter terms or phrases separated by search operators -such as AND, OR, or NOT then press SEARCH below. Terms should be specific -to the title, author, subject, notes, or abstract information associated -with a resource. -
-ENDDOCUMENT - $r->print(&simpletextfield('basicexp',$ENV{'form.basicexp'})); - $r->print(' '); - $r->print(&simplecheckbox('titleonly',$ENV{'form.titleonly'})); - $r->print('Title only '); -# $r->print(&simplecheckbox('allversions',$ENV{'form.allversions'})); -# Search historic archives - $r->print(< - - -$closebutton -$basicviewselect - -

-
-

Advanced Search

-$scrout -

- - -$closebutton -$advancedviewselect - -

+ $scrout.=&simpletextfield('customshow',$ENV{'form.customshow'}); + $scrout.=< ENDDOCUMENT - return OK; -} - -# ----------- grab unprocessed CGI variables that may have been appended to URL -sub get_unprocessed_cgi { - map { - my ($name, $value) = split(/=/,$_); - $value =~ tr/+/ /; - $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg; - if ($name eq 'catalogmode' or $name eq 'launch' or $name eq 'acts') { - $ENV{'form.'.$name}=$value; - } - } (split(/&/,$ENV{'QUERY_STRING'})); + return $scrout; } -# ------------------------------------------------------------- make persistent +###################################################################### +###################################################################### + +=pod + +=item &make_persistent() + +Returns a scalar which holds the current ENV{'form.*'} values in +a 'hidden' html input tag. This allows search interface information +to be somewhat persistent. + +=cut + +###################################################################### +###################################################################### + sub make_persistent { my $persistent=''; - - map { + foreach (keys %ENV) { if (/^form\./ && !/submit/) { my $name=$_; my $key=$name; $ENV{$key}=~s/\'//g; # do not mess with html field syntax $name=~s/^form\.//; $persistent.=< + END } - } (keys %ENV); + } return $persistent; } -# --------------------------------------------------------- Various form fields + +###################################################################### +###################################################################### + +=pod + +=item HTML form building functions + +=over 4 + +=item &simpletextfield() + +Inputs: $name,$value,$size + +Returns a text input field with the given name, value, and size. +If size is not specified, a value of 20 is used. + +=item &simplecheckbox() + +Inputs: $name,$value + +Returns a simple check box with the given $name. +If $value eq 'on' the box is checked. + +=item &searchphrasefield() + +Inputs: $title,$name,$value + +Returns html for a title line and an input field for entering search terms. +the instructions "Enter terms or phrases separated by search operators such +as AND, OR, or NOT." are given following the title. The entry field (which +is where the $name and $value are used) is an 80 column simpletextfield. + +=item &dateboxes() + +Returns html selection form elements for the specification of +the day, month, and year. + +=item &selectbox() + +Returns a scalar containing an html tag. + +=item $default + +The default value of the form. Can be $anyvalue or in @idlist. + +=item $anyvalue + +The

\n"; + if ($ENV{'form.catalogmode'} eq 'interactive') { + my $titleesc=$Fields{'title'}; + $titleesc=~s/\'/\\'/; # ' + $compiledresult.=< + +
+END + } + if ($ENV{'form.catalogmode'} eq 'groupsearch') { + $fnum+=0; + $hash{"pre_${fnum}_link"}=$Fields{'url'}; + $hash{"pre_${fnum}_title"}=$Fields{'title'}; + $compiledresult.=< + + +
+END +# +# + $fnum++; + } + if ($viewselect eq 'Detailed Citation View') { + $compiledresult.=&detailed_citation_view + (%Fields, hostname => $rkey ); + } + elsif ($viewselect eq 'Summary View') { + $compiledresult.=&summary_view + (%Fields, hostname => $rkey ); + } + elsif ($viewselect eq 'Fielded Format') { + $compiledresult.=&fielded_format_view + (%Fields, hostname => $rkey ); + } + elsif ($viewselect eq 'XML/SGML') { + $compiledresult.=&xml_sgml_view + (%Fields, hostname => $rkey ); + } + if ($compiledresult or $servercount!=$servernum) { + $compiledresult.="

"; + } + } + untie %hash; + } + if ($compiledresult) { + $resultflag=1; + $r->print($compiledresult); + } + my $percent=sprintf('%3.0f',($servercount/$servernum*100)); + } # End of foreach loop over servers remaining + } # End of big loop - while($serversleft && $timeremain) + unless ($resultflag) { + $r->print("\nThere were no results that matched your query\n"); + } +# $r->print(''."\n"); $r->rflush(); + $r->print("\n\n"); + return; +} + +########################################################### +########################################################### + +=pod + +=item &parse_raw_result() + +Takes a line from the file of results and parse it. Returns a hash +with keys for the following fields: +'title', 'author', 'subject', 'url', 'keywords', 'version', 'notes', +'abstract', 'mime', 'lang', 'owner', 'copyright', 'creationdate', +'lastrevisiondate'. + +In addition, the following tags are set by calling the appropriate +lonnet function: 'language', 'cprtag', 'mimetag'. + +The 'title' field is set to "Untitled" if the title field is blank. + +'abstract' and 'keywords' are truncated to 200 characters. +=cut + +########################################################### +########################################################### +sub parse_raw_result { + my ($result,$hostname) = @_; + # Check for a comma - if it is there then we do not need to unescape the + # string. There seems to be some kind of problem with some items in + # the database - the entire string gets sent out unescaped...? + unless ($result =~ /,/) { + $result = &Apache::lonnet::unescape($result); + } + my @fields=map { + &Apache::lonnet::unescape($_); + } (split(/\,/,$result)); + my ($title,$author,$subject,$url,$keywords,$version, + $notes,$abstract,$mime,$lang, + $creationdate,$lastrevisiondate,$owner,$copyright)=@fields; + my %Fields = + ( title => &Apache::lonnet::unescape($title), + author => &Apache::lonnet::unescape($author), + subject => &Apache::lonnet::unescape($subject), + url => &Apache::lonnet::unescape($url), + keywords => &Apache::lonnet::unescape($keywords), + version => &Apache::lonnet::unescape($version), + notes => &Apache::lonnet::unescape($notes), + abstract => &Apache::lonnet::unescape($abstract), + mime => &Apache::lonnet::unescape($mime), + lang => &Apache::lonnet::unescape($lang), + owner => &Apache::lonnet::unescape($owner), + copyright => &Apache::lonnet::unescape($copyright), + creationdate => &Apache::lonnet::unescape($creationdate), + lastrevisiondate => &Apache::lonnet::unescape($lastrevisiondate) + ); + $Fields{'language'} = + &Apache::loncommon::languagedescription($Fields{'lang'}); + $Fields{'copyrighttag'} = + &Apache::loncommon::copyrightdescription($Fields{'copyright'}); + $Fields{'mimetag'} = + &Apache::loncommon::filedescription($Fields{'mime'}); + # Put spaces in the keyword list, if needed. + $Fields{'keywords'}=~ s/,([A-z])/, $1/g; + if ($Fields{'title'}=~ /^\s*$/ ) { + $Fields{'title'}='Untitled'; + } + unless ($ENV{'user.adv'}) { + $Fields{'keywords'} = '- not displayed -'; + $Fields{'notes'} = '- not displayed -'; + $Fields{'abstract'} = '- not displayed -'; + $Fields{'subject'} = '- not displayed -'; + } + if (length($Fields{'abstract'})>200) { + $Fields{'abstract'} = + substr($Fields{'abstract'},0,200).'...'; + } + if (length($Fields{'keywords'})>200) { + $Fields{'keywords'} = + substr($Fields{'keywords'},0,200).'...'; + } + return %Fields; +} + +########################################################### +########################################################### + +=pod + +=item &handle_custom_fields() + +=cut + +########################################################### +########################################################### +sub handle_custom_fields { + my @results = @{shift()}; + my $customshow=''; + my $extrashow=''; + my @customfields; + if ($ENV{'form.customshow'}) { + $customshow=$ENV{'form.customshow'}; + $customshow=~s/[^\w\s]//g; + my @fields=map { + "$_:"; + } split(/\s+/,$customshow); + @customfields=split(/\s+/,$customshow); + if ($customshow) { + $extrashow="
  • ".join("
  • ",@fields)."
\n"; + } + } + my $customdata=''; + my %customhash; + foreach my $result (@results) { + if ($result=~/^(custom\=.*)$/) { # grab all custom metadata + my $tmp=$result; + $tmp=~s/^custom\=//; + my ($k,$v)=map {&Apache::lonnet::unescape($_); + } split(/\,/,$tmp); + $customhash{$k}=$v; + } + } + return ($extrashow,\@customfields,\%customhash); +} + +###################################################################### +###################################################################### + +=pod + +=item &search_results_header + +Output the proper html headers and javascript code to deal with different +calling modes. + +Takes most inputs directly from %ENV, except $mode. + +=over 4 + +=item $mode is either (at this writing) 'Basic' or 'Advanced' + +=back + +The following environment variables are checked: + +=over 4 + +=item 'form.catalogmode' + +Checked for 'interactive' and 'groupsearch'. + +=item 'form.mode' + +Checked for existance & 'edit' mode. + +=item 'form.form' + +=item 'form.element' + +=back + +=cut + +###################################################################### +###################################################################### +sub search_results_header { + my ($mode) = @_; + $mode = lc($mode); + my $title; + if ($mode eq 'advanced') { + $title = "Advanced Search Results"; + } elsif ($mode eq 'basic') { + $title = "Basic Search Results"; + } + my $result = ''; # output beginning of search page - $r->print(< -The LearningOnline Network with CAPA +$title BEGINNING - # conditional output of script functions dependent on the mode in # which the search was invoked - $r->print(< function select_data(title,url) { changeTitle(title); @@ -873,7 +1507,30 @@ BEGINNING } SCRIPT - $r->print(< +function select_data(title,url) { + changeURL(url); + self.close(); +} +function changeTitle(val) { +} +function changeURL(val) { + if (window.opener.document) { + window.opener.document.forms["$form"].elements["$element"].value=val; + } else { + var url = 'forms[\"$form\"].elements[\"$element\"].value'; + alert("Unable to transfer data to "+url); + } +} + +SCRIPT + } + } + $result.=< SCRIPT - $r->print(< function displayinfo(val) { popwin.document.forms.popremain.sdetails.value=val; @@ -903,57 +1561,41 @@ SCRIPT openhelpwin.focus(); } function abortsearch(val) { - openhelpwin=open('/adm/help/searchcat.html','helpscreen', - 'scrollbars=1,width=400,height=300'); - openhelpwin.focus(); + popwin.close(); } SCRIPT - $r->rflush(); - - # begin showing the cataloged results - $r->print(< -

Search Catalog

-CATALOGBEGIN - $r->print(< - - -$importbutton -$closebutton -$persistent -
-

Search Query

-CATALOGCONTROLS - if ($mode eq 'Basic') { - $r->print(< -Basic search: $ENV{'form.basicexp'} -

-RESULTS - } - elsif ($mode eq 'Advanced') { - $r->print(< -Advanced search -$query -

-RESULTS - } - $r->print('

Search Results

'); - $r->rflush(); - my $servernum=(keys %rhash)+0; +

$title

+END + return $result; +} + +###################################################################### +###################################################################### + +=pod - # define server grid (shows status of multiple machines) +=item &make_popwin() + +Returns html with javascript in it to open up the status window. + +=cut + +###################################################################### +###################################################################### +sub make_popwin { + my %rhash = @_; + my $servernum=(keys %rhash); my $hcinit; - my $grid="'
'+"; - $grid.="\n"; + my $grid="'
'+\n"; + # $sn is the server number, used ONLY to make sure we have + # rows of 10 each. No longer used to index images. my $sn=1; - for my $sk (sort keys %rhash) { + foreach my $sk (sort keys %rhash) { # ''+ $grid.="'+\"'\"+')\">'+"; $grid.="\n"; - $grid.="'\"".$sk."\"'+\n"; + $grid.="'\"".$sk.'+\n"; $grid.="'
'+\n" unless $sn%10; $sn++; } - $r->print(< - popwin=open('','popwin','scrollbars=1,width=400,height=200'); + popwin=open('','popwin','scrollbars=1,width=400,height=220'); popwin.focus(); popwin.document.writeln('<'+'html>'); popwin.document.writeln('<'+'head>'); @@ -1010,11 +1653,11 @@ RESULTS $grid '<'+'br />'+ 'Server details '+ - '<'+'input type="text" size="25" name="sdetails"'+ + '<'+'input type="text" size="35" name="sdetails"'+ ' value="" />'+ '<'+'br />'+ ' <'+'input type="button" name="button"'+ - ' value="abort search and view current results" '+ + ' value="close this window" '+ ' onClick="javascript:opener.abortsearch()" />'+ ' <'+'input type="button" name="button"'+ ' value="help" onClick="javascript:opener.openhelp()" />'+ @@ -1024,387 +1667,173 @@ RESULTS popwin.document.close(); ENDPOP - $r->rflush(); - - my $servercount=0; - my $hitcountsum=0; - my $bloop=$servernum; - my %orkey; - BLOOP: while(1) { - my $sn=0; - last BLOOP unless $bloop; - RLOOP: foreach my $rkey (sort keys %rhash) { - $sn++; - next RLOOP if $orkey{$rkey}; - $servercount++; - $tflag=1; - $compiledresult=''; - my $hostname=$rkey; - my $reply=$rhash{$rkey}; - my @results; - - my $replyfile=''; + return $result; +} - if ($reply eq 'con_lost') { - $r->print(''. - "\n"); - $r->rflush(); - $bloop--; - $orkey{$rkey}=1; - } - else { - $reply=~/^([\.\w]+)$/; # must do since 'use strict' checks for tainting - $replyfile=$r->dir_config('lonDaemons').'/tmp/'.$1; - $reply=~/(.*?)\_/; - { - my $temp=0; - WLOOP: while (1) { - if (-e $replyfile && $tflag) { - $r->print(''. - "\n"); - $r->rflush(); - $r->print(''. - "\n"); - $r->rflush(); - $tflag=0; - } - if ($temp>1) { - sleep 1; - $timeremain--; - $elapsetime++; - last WLOOP; - } - if (-e "$replyfile.end") { - $bloop--; - $orkey{$rkey}=1; - if (-s $replyfile) { - $r->print(''."\n"); - $r->rflush(); - my $fh=Apache::File->new($replyfile) or - ($r->print('ERROR: file '. - $replyfile.' cannot be opened') and - return OK); - @results=<$fh> if $fh; - $hitcount{$rkey}=@results+0; - $r->print(''. - "\n"); - $r->rflush(); - $hitcountsum+=$hitcount{$rkey}; - $r->print(''. - "\n"); - $r->rflush(); - } - else { - $r->print(''. - "\n"); - $r->rflush(); - $r->print(''. - "\n"); - $r->rflush(); - } - last WLOOP; - } - last WLOOP unless $timeremain; - sleep 1; - $timeremain--; - $elapsetime++; - $r->print(''."\n"); - $r->rflush(); - $temp++; - } - } - $r->print(''."\n"); - $r->rflush(); - } - 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 $result (@results) { - if ($result=~/^(custom\=.*)$/) { # grab all custom metadata - my $tmp=$result; - $tmp=~s/^custom\=//; - my ($k,$v)=map {&Apache::lonnet::unescape($_); - } split(/\,/,$tmp); - $customhash{$k}=$v; - } - } - if (keys %hash) { - untie %hash; - } - if (tie(%hash,'GDBM_File',$diropendb,&GDBM_WRCREAT,0640)) { - if ($ENV{'form.launch'} eq '1') { - &start_fresh_session(); - } - foreach my $result (@results) { - next if $result=~/^custom\=/; - chomp $result; - next unless $result; - my @fields=map - {&Apache::lonnet::unescape($_)} - (split(/\,/,$result)); - my ($title,$author,$subject,$url,$keywords,$version, - $notes,$abstract,$mime,$lang, - $creationdate,$lastrevisiondate,$owner,$copyright)=@fields; - - unless ($ENV{'user.adv'}) { - $keywords='- not displayed -'; - $fields[4]=$keywords; - $notes='- not displayed -'; - $fields[6]=$notes; - $abstract='- not displayed -'; - $fields[7]=$abstract; - $subject='- not displayed -'; - $fields[2]=$subject; - } +###################################################################### +###################################################################### - my $shortabstract=$abstract; - $shortabstract=substr($abstract,0,200).'...' if length($abstract)>200; - $fields[7]=$shortabstract; - my $shortkeywords=$keywords; - $shortkeywords=substr($keywords,0,200).'...' if length($keywords)>200; - $fields[4]=$shortkeywords; +=pod - my $extrashow2=$extrashow; - if ($extrashow) { - foreach my $field (@customfields) { - my $value=''; - if ($customhash{$url}=~/\<${field}[^\>]*\>(.*?)\<\/${field}[^\>]*\>/s) { - $value=$1; - } - $extrashow2=~s/\<\!\-\- $field \-\-\>/ $value/g; - } - } - - $compiledresult.=< -END - $compiledresult.=< -END - $compiledresult.=< - -
-END - if ($ENV{'form.catalogmode'} eq 'groupsearch') { - $fnum+=0; - $hash{"pre_${fnum}_link"}=$url; - $hash{"pre_${fnum}_title"}=$title; - $compiledresult.=< - -
-END -# -# - $fnum++; - } - my $httphost=$ENV{'HTTP_HOST'}; +=item Metadata Viewing Functions - my $viewselect; - if ($mode eq 'Basic') { - $viewselect=$ENV{'form.basicviewselect'}; - } - elsif ($mode eq 'Advanced') { - $viewselect=$ENV{'form.advancedviewselect'}; - } +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. - if ($viewselect eq 'Detailed Citation View') { - $compiledresult.=&detailed_citation_view(@fields, - $hostname,$httphost, - $extrashow2); - } - elsif ($viewselect eq 'Summary View') { - $compiledresult.=&summary_view(@fields,$hostname,$httphost, - $extrashow2); - } - elsif ($viewselect eq 'Fielded Format') { - $compiledresult.=&fielded_format_view(@fields,$hostname, - $httphost,$extrashow2); - } - elsif ($viewselect eq 'XML/SGML') { - $compiledresult.=&xml_sgml_view(@fields,$hostname,$httphost, - $extrashow2); - } - - } +=over 4 - untie %hash; - } - else { - $r->print('Unable to tie hash to db '. - 'file'); - } - if ($compiledresult) { - $resultflag=1; - } +=item &detailed_citation_view() - $r->print(<print("\nThere were no results that matched your query\n"); - } -# $r->print(''."\n"); $r->rflush(); - $r->print(< - -RESULTS -} +=cut -# ------------------------------------------------------ Detailed Citation View +###################################################################### +###################################################################### sub detailed_citation_view { - my ($title,$author,$subject,$url,$keywords,$version, - $notes,$shortabstract,$mime,$lang, - $creationdate,$lastrevisiondate,$owner,$copyright, - $hostname,$httphost,$extrashow)=@_; + my %values = @_; my $result=<$owner, last revised $lastrevisiondate -

$title

-

$author

-

+

$values{'title'}

-Subject: $subject
-Keyword(s): $keywords
-Notes: $notes
-MIME Type: $mimetag{$mime}
-Language: $language{$lang}
-Copyright/Distribution: $cprtag{$copyright}
+$values{'author'}, $values{'owner'}
+ +Subject: $values{'subject'}
+Keyword(s): $values{'keywords'}
+Notes: $values{'notes'}
+MIME Type: $values{'mimetag'}
+Language: $values{'language'}
+Copyright/Distribution: $values{'cprtag'}

-$extrashow +$values{'extrashow'}

-$shortabstract +$values{'shortabstract'}

END return $result; } -# ---------------------------------------------------------------- Summary View +###################################################################### +###################################################################### + +=pod + +=item &summary_view() + +=cut + +###################################################################### +###################################################################### sub summary_view { - my ($title,$author,$subject,$url,$keywords,$version, - $notes,$shortabstract,$mime,$lang, - $creationdate,$lastrevisiondate,$owner,$copyright, - $hostname,$httphost,$extrashow)=@_; + my %values = @_; my $result=<$author
-$title
-$owner -- $lastrevisiondate
-$cprtag{$copyright}
-$extrashow +$values{'author'}
+$values{'title'}
+$values{'owner'} -- $values{'lastrevisiondate'}
+$values{'copyrighttag'}
+$values{'extrashow'}

END return $result; } -# -------------------------------------------------------------- Fielded Format +###################################################################### +###################################################################### + +=pod + +=item &fielded_format_view() + +=cut + +###################################################################### +###################################################################### sub fielded_format_view { - my ($title,$author,$subject,$url,$keywords,$version, - $notes,$shortabstract,$mime,$lang, - $creationdate,$lastrevisiondate,$owner,$copyright, - $hostname,$httphost,$extrashow)=@_; + my %values = @_; my $result=<URL: $url +URL: $values{'url'}
-Title: $title
-Author(s): $author
-Subject: $subject
-Keyword(s): $keywords
-Notes: $notes
-MIME Type: $mimetag{$mime}
-Language: $language{$lang}
-Creation Date: $creationdate
-Last Revision Date: $lastrevisiondate
-Publisher/Owner: $owner
-Copyright/Distribution: $cprtag{$copyright}
-Repository Location: $hostname
-Abstract: $shortabstract
-$extrashow +Title: $values{'title'}
+Author(s): $values{'author'}
+Subject: $values{'subject'}
+Keyword(s): $values{'keywords'}
+Notes: $values{'notes'}
+MIME Type: $values{'mimetag'}
+Language: $values{'language'}
+Creation Date: $values{'creationdate'}
+Last Revision Date: $values{'lastrevisiondate'}
+Publisher/Owner: $values{'owner'}
+Copyright/Distribution: $values{'copyrighttag'}
+Repository Location: $values{'hostname'}
+Abstract: $values{'shortabstract'}
+$values{'extrashow'}

END return $result; } -# -------------------------------------------------------------------- XML/SGML +###################################################################### +###################################################################### + +=pod + +=item &xml_sgml_view() + +=back + +=cut + +###################################################################### +###################################################################### sub xml_sgml_view { - my ($title,$author,$subject,$url,$keywords,$version, - $notes,$shortabstract,$mime,$lang, - $creationdate,$lastrevisiondate,$owner,$copyright, - $hostname,$httphost,$extrashow)=@_; + my %values = @_; my $result=< <LonCapaResource> -<url>$url</url> -<title>$title</title> -<author>$author</author> -<subject>$subject</subject> -<keywords>$keywords</keywords> -<notes>$notes</notes> +<url>$values{'url'}</url> +<title>$values{'title'}</title> +<author>$values{'author'}</author> +<subject>$values{'subject'}</subject> +<keywords>$values{'keywords'}</keywords> +<notes>$values{'notes'}</notes> <mimeInfo> -<mime>$mime</mime> -<mimetag>$mimetag{$mime}</mimetag> +<mime>$values{'mime'}</mime> +<mimetag>$values{'mimetag'}</mimetag> </mimeInfo> <languageInfo> -<language>$lang</language> -<languagetag>$language{$lang}</languagetag> +<language>$values{'lang'}</language> +<languagetag>$values{'language'}</languagetag> </languageInfo> -<creationdate>$creationdate</creationdate> -<lastrevisiondate>$lastrevisiondate</lastrevisiondate> -<owner>$owner</owner> +<creationdate>$values{'creationdate'}</creationdate> +<lastrevisiondate>$values{'lastrevisiondate'}</lastrevisiondate> +<owner>$values{'owner'}</owner> <copyrightInfo> -<copyright>$copyright</copyright> -<copyrighttag>$cprtag{$copyright}</copyrighttag> +<copyright>$values{'copyright'}</copyright> +<copyrighttag>$values{'copyrighttag'}</copyrighttag> </copyrightInfo> -<repositoryLocation>$hostname</repositoryLocation> -<shortabstract>$shortabstract</shortabstract> +<repositoryLocation>$values{'hostname'}</repositoryLocation> +<shortabstract>$values{'shortabstract'}</shortabstract> </LonCapaResource> -$extrashow +$values{'extrashow'} END return $result; } -# ---------------------------------------------------- see if a field is filled +###################################################################### +###################################################################### + +=pod + +=item &filled() see if field is filled. + +=cut + +###################################################################### +###################################################################### sub filled { my ($field)=@_; if ($field=~/\S/ && $field ne 'any') { @@ -1415,7 +1844,17 @@ sub filled { } } -# ---------------- Message to output when there are not enough fields filled in +###################################################################### +###################################################################### + +=pod + +=item &output_blank_field_error() + +=cut + +###################################################################### +###################################################################### sub output_blank_field_error { my ($r)=@_; # make query information persistent to allow for subsequent revision @@ -1449,18 +1888,28 @@ processed. RESULTS } -# ----------------------------------------------------------- Output date error +###################################################################### +###################################################################### + +=pod + +=item &output_date_error() + +Output a full html page with an error message. + +=cut + +###################################################################### +###################################################################### sub output_date_error { my ($r,$message)=@_; # make query information persistent to allow for subsequent revision my $persistent=&make_persistent(); - $r->print(<print(< The LearningOnline Network with CAPA -BEGINNING - $r->print(< @@ -1480,261 +1929,83 @@ $message RESULTS } -# --------- settings whenever the user causes the search window to be launched +###################################################################### +###################################################################### + +=pod + +=item &start_fresh_session() + +Cleans the global %hash by removing all fields which begin with +'pre_' or 'store'. + +=cut + +###################################################################### +###################################################################### sub start_fresh_session { delete $hash{'mode_catalog'}; - map { + foreach (keys %hash) { if ($_ =~ /^pre_/) { delete $hash{$_}; } if ($_ =~ /^store/) { delete $hash{$_}; } - } keys %hash; + } } -1; - -__END__ - -=head1 NAME - -Apache::lonsearchcat - mod_perl module for handling a searchable catalog - -=head1 SYNOPSIS +###################################################################### +###################################################################### -Invoked by /etc/httpd/conf/srm.conf: +=pod - - PerlAccessHandler Apache::lonacc - SetHandler perl-script - PerlHandler Apache::lonsearchcat - ErrorDocument 403 /adm/login - ErrorDocument 500 /adm/errorhandler - +=item &popwin_js() send javascript to popwin -=head1 INTRODUCTION - -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. - -=head1 BEGIN SUBROUTINE - -This routine is only run once after compilation. - -=over 4 - -=item * - -Initializes %language hash table. - -=item * - -Initializes %cprtag hash table (for copyright.tab). - -=item * - -Initializes %mimetag hash table (for filetypes.tab). - -=item * - -Initializes %hostdomains and hostips hash table (for hosts.tab). - -=back - -=head1 HANDLER SUBROUTINE - -This routine is called by Apache and mod_perl. - -=over 4 - -=item * - -configure dynamic components of interface - -=item * - -determine current user - -=item * - -see if a search invocation should be done - -=item * - -else, begin building search interface to output - -=item * - -compute date selection boxes - -=item * - -compute customized metadata field - -=item * - -print screen - -=back - -=head1 OTHER SUBROUTINES - -=over 4 - -=item * - -get_unprocessed_cgi() : reads in critical name/value pairs that may have not -been processed and passed into %ENV by the web server - -=item * - -make_persistent() : makes a set of hidden HTML fields to make -SQL search interface information to be persistent - -=back - -WEB INTERFACE COMPONENT FUNCTIONS - -=over 4 - -=item * - -simpletextfield(name,value) : returns HTML formatted string for simple text -field - -=item * - -simplecheckbox(name,value) : returns HTML formatted string for simple -checkbox - -=item * - -searchphrasefield(title,name,value) : returns HTML formatted string for -a search expression phrase field - -=item * - -dateboxes(name, defaultmonth, defaultday, defaultyear) : returns HTML -formatted string for a calendar date - -=item * - -selectbox(title,name,value,%HASH=options) : returns HTML formatted string for -a selection box field - -=back - -SEARCH FUNCTIONS - -=over 4 - -=item * - -advancedsearch(server reference, environment reference) : perform a complex -multi-field logical query - -=item * - -basicsearch(server reference, environment reference) : perform a simple -single-field logical query - -=item * - -build_SQL_query(field name, logic) : builds a SQL query string from a -logical expression with AND/OR keywords - -=item * - -build_custommetadata_query(field_name, logic_statement) : builds a perl -regular expression from a logical expression with AND/OR keywords - -=item * - -recursive_SQL_query_build(field name, reverse notation expression) : -builds a SQL query string from a reverse notation expression -logical expression with AND/OR keywords - -=item * - -build_date_queries(cmonth1, cday1, cyear1, cmonth2, cday2, cyear2, -lmonth1, lday1, lyear1, lmonth2, lday2, lyear2) : -Builds a SQL logic query to check time/date entries. - -=back - -OUTPUTTING RESULTS FUNCTION - -=over 4 - -=item * - -output_results(output mode, server reference, environment reference, -reply list reference) : outputs results from search - -=back - -DIFFERENT WAYS TO VIEW METADATA RECORDS - -=over 4 - -=item * - -detailed_citation_view(ORDERED METADATA LIST FOR A RESULT OBJECT INSTANCE) : -see metadata viewing notes below - -=item * - -summary_view(ORDERED METADATA LIST FOR A RESULT OBJECT INSTANCE) : -see metadata viewing notes below - -=item * - -fielded_format_view(ORDERED METADATA LIST FOR A RESULT OBJECT INSTANCE) : -see metadata viewing notes below - -=item * - -xml_sgml_view(ORDERED METADATA LIST FOR A RESULT OBJECT INSTANCE) : -see metadata viewing notes below - -=back - - _____________________________________________________________________ - | * Metadata viewing notes | - | 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, httphost, and | - | extra custom metadata to show. | - --------------------------------------------------------------------- - -TEST CONDITIONAL FUNCTIONS +=cut -=over 4 +###################################################################### +###################################################################### +sub popwin_js { + # Print javascript out to popwin, but make sure we dont generate + # any javascript errors in doing so. + my ($r,$text) = @_; + $r->print(<<"END"); + +END + $r->rflush(); +} -=item * +###################################################################### +###################################################################### -filled(field) : determines whether a given field has been filled +=pod -=back +=item &popwin_imgupdate() -ERROR FUNCTIONS +Send a given image (and its location) out to the browser. Takes as +input $r, loncapa server id, and an icon URL. -=over 4 +=cut -=item * +###################################################################### +###################################################################### +sub popwin_imgupdate { + my ($r,$server,$icon) = @_; + &popwin_js($r,'popwin.document.img_'.$Apache::lonnet::hostdom{$server}. + '_'.$server.'.'.'src="/adm/lonIcons/'.$icon.'";'); +} -output_blank_field_error(server reference) : outputs a message saying that -more fields need to be filled in +1; -=item * +__END__ -output_date_error(server reference, error message) : outputs -an error message specific to bad date format. +=pod -=back +=back =cut