--- loncom/interface/lonsearchcat.pm 2002/06/10 23:55:47 1.120 +++ loncom/interface/lonsearchcat.pm 2002/07/16 15:02:06 1.143 @@ -1,7 +1,7 @@ # The LearningOnline Network with CAPA # Search Catalog # -# $Id: lonsearchcat.pm,v 1.120 2002/06/10 23:55:47 harris41 Exp $ +# $Id: lonsearchcat.pm,v 1.143 2002/07/16 15:02:06 matthew Exp $ # # Copyright Michigan State University Board of Trustees # @@ -31,18 +31,50 @@ # 10/12,10/14,10/15,10/16,11/28,11/29,12/10,12/12,12/16 Scott Harrison # YEAR=2002 # 1/17 Scott Harrison +# 6/17 Matthew Hall # -### +############################################################################### +############################################################################### + +=pod + +=head1 NAME + +lonsearchcat - 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 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 ## ## ## ############################################################################### @@ -60,105 +92,136 @@ use Apache::loncommon(); # ---------------------------------------- variables used throughout the module -# -- information holders -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 select results and go to group sorting + +=item %groupsearch_db + +Database hash used to save values for the groupsearch RAT interface. + +=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(). + +=item %Views + +Hash which associates an output view description with the function +that produces it. Adding a new view type should be as easy as +adding a line to the definition of this hash and making sure the function +takes the proper parameters. + +=item $results_db + +The name of the database results from searches are put in. + +=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 -my $hidden; # -- 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 %groupsearch_db; # database hash +my $diropendb = ""; # db file -# ----------------------------------------------------------------------- BEGIN -BEGIN { - { - my $fh=Apache::File->new($Apache::lonnet::perlvar{'lonTabDir'}. - '/hosts.tab'); - while (<$fh>) { - $_=~/(\w+?)\:(\w+?)\:(\w+?)\:(.*)/; chomp; - if ($3 eq 'library') { - $hostdomains{$1}=$2; - $hostips{$1}=$4; - } - } - } -} +my $results_db = ""; +# View Description Function Pointer +my %Views = ("Detailed Citation View" => \&detailed_citation_view, + "Summary View" => \&summary_view, + "Fielded Format" => \&fielded_format_view, + "XML/SGML" => \&xml_sgml_view ); + +###################################################################### +###################################################################### -#------------------------------------------------------------- global variables -my $diropendb = ""; -my $domain = ""; +=pod -# ----------------------------- Handling routine called via Apache and mod_perl +=item &handler() - main handler invoked by httpd child + +=item Variables + +=over 4 + +=item $hidden + +holds 'hidden' html forms + +=item $scrout + +string that holds portions of the screen output + +=back + +=cut + +###################################################################### +###################################################################### sub handler { my $r = shift; - untie %hash; + untie %groupsearch_db; $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"; - + ## + ## Initialize global variables + ## + my $domain = $r->dir_config('lonDefDomain'); + $diropendb= "/home/httpd/perl/tmp/".&Apache::lonnet::escape($domain). + "\_".&Apache::lonnet::escape($ENV{'user.name'})."_searchcat.db"; + $results_db = "/home/httpd/perl/tmp/".&Apache::lonnet::escape($domain). + '_'.&Apache::lonnet::escape($ENV{'user.name'})."_searchresults.db"; &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'}, - ['catalogmode','launch','acts','mode','form','element']); - + ['catalogmode','launch','acts','mode','form','element', + 'reqinterface']); + ## + ## Clear out old values from groupsearch database + ## if ($ENV{'form.launch'} eq '1') { - if (tie(%hash,'GDBM_File',$diropendb,&GDBM_WRCREAT,0640)) { + if (tie(%groupsearch_db,'GDBM_File',$diropendb,&GDBM_WRCREAT,0640)) { &start_fresh_session(); - untie %hash; - } - else { + untie %groupsearch_db; + } else { $r->print('Unable to tie hash to db '. 'file'); return OK; } } - -# --------------------------- Produce some output, so people know it is working - + ## + ## Produce some output, so people know it is working + ## $r->print("\n"); $r->rflush; - -# ----------------------------------- configure dynamic components of interface - + ## + ## 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 @@ -170,69 +233,248 @@ END onClick='javascript:select_group()'> END } - $hidden .= < - - - -END -# ------------------------------------------------------ Determine current user - $yourself=$ENV{'user.name'}.'@'.$ENV{'user.domain'}; + $hidden .= &make_persistent({ "form.mode" => $ENV{'form.mode'}, + "form.form" => $ENV{'form.form'}, + "form.element" => $ENV{'form.element'}, + "form.date" => 2 }); + ## + ## What are we doing? + ## + my $searchtype; + $searchtype = 'Basic' if ($ENV{'form.basicsubmit'} eq 'SEARCH'); + $searchtype = 'Advanced' if ($ENV{'form.advancedsubmit'} eq 'SEARCH'); + if ($searchtype) { + # We are running a search + my ($query,$customquery,$customshow,$libraries) = + (undef,undef,undef,undef); + my $pretty_string; + if ($searchtype eq 'Basic') { + ($query,$pretty_string) = &parse_basic_search($r); + } elsif ($ENV{'form.advancedsubmit'} eq 'SEARCH') { + ($query,$customquery,$customshow,$libraries,$pretty_string) + = &parse_advanced_search($r); + return OK if (! defined($query)); + } + # Output some information to the user. + $r->print(&search_results_header($searchtype,$pretty_string)); + $r->print("Sending search request to LON-CAPA servers.
\n"); + $r->rflush(); + # Send query statements over the network to be processed by + # either the SQL database or a recursive scheme of 'grep'-like + # actions (for custom metadata). + my $reply=&Apache::lonnet::metadata_query($query,$customquery, + $customshow,$libraries); + $r->rflush(); + &output_results($searchtype,$r,$reply,$hidden); + } else { + # + # We need to get information to search on + # + # Set the default view if it is not already set. + if (!defined($ENV{'form.viewselect'})) { + $ENV{'form.viewselect'} ="Detailed Citation View"; + } + # Output the advanced interface + if ($ENV{'form.reqinterface'} eq 'advanced') { + $r->print(&advanced_search_form($closebutton,$hidden)); + } else { + # Output normal search interface + $r->print(&basic_search_form($closebutton,$hidden)); + } + } + return OK; +} -# --- Now, depending on the interface actions, do one of three things here: -# --- 1. a basic search -# --- 2. an advanced search -# --- 3. output a search interface +###################################################################### +###################################################################### -# ----------------------------------- See if a search invocation should be done - if ($ENV{'form.basicsubmit'} eq 'SEARCH') { - untie %hash; return &basicsearch($r,\%ENV); - } - elsif ($ENV{'form.advancedsubmit'} eq 'SEARCH') { - untie %hash; return &advancedsearch($r,\%ENV); - } +=pod -# ----------------------------- Else, begin building search interface to output - $scrout=''; # building a part of screen output - $scrout.=&searchphrasefield('Limit by title','title', - $ENV{'form.title'}); +=item &basic_search_form() - $scrout.=&searchphrasefield('Limit by author','author', - $ENV{'form.author'}); +Returns a scalar which holds html for the basic search form. - $scrout.=&searchphrasefield('Limit by subject','subject', - $ENV{'form.subject'}); +=cut - $scrout.=&searchphrasefield('Limit by keywords','keywords', - $ENV{'form.keywords'}); +###################################################################### +###################################################################### - $scrout.=&searchphrasefield('Limit by URL','url', - $ENV{'form.url'}); +sub basic_search_form{ + my ($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'; + my $checkbox = &simplecheckbox('related',$ENV{'form.related'}); + $scrout.=<Advanced Search
$checkbox use related words
+

+

+   +$closebutton +END + $scrout.=&selectbox(undef,'viewselect', + $ENV{'form.viewselect'}, + undef,undef,undef, + sort(keys(%Views))); + $scrout.=< +

+
+ + +ENDDOCUMENT + return $scrout; +} +###################################################################### +###################################################################### -# $scrout.=&searchphrasefield('Limit by version','version', -# $ENV{'form.version'}); +=pod - $scrout.=&searchphrasefield('Limit by notes','notes', - $ENV{'form.notes'}); +=item &advanced_search_form() - $scrout.=&searchphrasefield('Limit by abstract','abstract', - $ENV{'form.abstract'}); +Returns a scalar which holds html for the advanced search form. - $ENV{'form.mime'}='any' unless length($ENV{'form.mime'}); - $scrout.=&selectbox('Limit by MIME type','mime', - $ENV{'form.mime'}, - 'any','Any type', - \&{Apache::loncommon::filedescriptionex}, - (&Apache::loncommon::fileextensions)); +=cut - $ENV{'form.language'}='any' unless length($ENV{'form.language'}); +###################################################################### +###################################################################### +sub advanced_search_form{ + my ($closebutton,$hidden) = @_; + my $advanced_buttons = <<"END"; +

+ + +$closebutton + +

+END + if (!defined($ENV{'form.viewselect'})) { + $ENV{'form.viewselect'} ="Detailed Citation View"; + } + 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 + + +\n"; + $scrout.=&searchphrasefield_with_related('title', 'title' , + $ENV{'form.title'}); + $scrout.=&searchphrasefield('author', 'author' ,$ENV{'form.author'}); + $scrout.=&searchphrasefield_with_related('subject', 'subject' , + $ENV{'form.subject'}); + $scrout.=&searchphrasefield_with_related('keywords','keywords', + $ENV{'form.keywords'}); + $scrout.=&searchphrasefield('URL', 'url' ,$ENV{'form.url'}); + $scrout.=&searchphrasefield_with_related('notes', 'notes' , + $ENV{'form.notes'}); + $scrout.=&searchphrasefield_with_related('abstract','abstract', + $ENV{'form.abstract'}); + # 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: +ENDHEADER + $scrout.=&selectbox(undef,'viewselect', + $ENV{'form.viewselect'}, + undef,undef,undef, + sort(keys(%Views))); + $scrout.="Related
Words
   
   
\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'. + # + $ENV{'form.domains'} = 'any' if (! exists($ENV{'form.domains'})); + my @allowed_domains = (ref($ENV{'form.domains'}) ? @{$ENV{'form.domains'}} + : ($ENV{'form.domains'}) ); + my %domain_hash = (); + foreach (@allowed_domains) { + $domain_hash{$_}++; + } + 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.="\n".''. + 'DOMAINS
'. + '\n"; + } + #---------------------------------------------------------------- $scrout.=&selectbox('Limit by language','language', $ENV{'form.language'},'any','Any Language', \&{Apache::loncommon::languagedescription}, (&Apache::loncommon::languageids), ); - # ------------------------------------------------ Compute date selection boxes $scrout.=< @@ -246,16 +488,13 @@ CREATIONDATESTART $ENV{'form.creationdatestart_day'}, $ENV{'form.creationdatestart_year'}, ); - $scrout.=< LIMIT BY LAST REVISION DATE RANGE: @@ -276,10 +515,6 @@ 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'}, @@ -287,7 +522,6 @@ LASTREVISIONDATEEND \&{Apache::loncommon::copyrightdescription}, (&Apache::loncommon::copyrightids), ); - # ------------------------------------------- Compute customized metadata field $scrout.=< @@ -298,9 +532,7 @@ For resource-specific metadata, enter in Example: grandmother=75 OR grandfather=85
CUSTOMMETADATA -$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'}); $scrout.=< SHOW SPECIAL METADATA FIELDS: @@ -309,112 +541,200 @@ Enter in a space-separated list of speci in a fielded listing for each record result.
CUSTOMSHOW -$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; -} + return $scrout; +} + +###################################################################### +###################################################################### + +=pod + +=item &make_persistent() + +Returns a scalar which holds the current ENV{'form.*'} values in +a 'hidden' html input tag. This allows search interface information +to be somewhat persistent. + +=cut + +###################################################################### +###################################################################### -# ------------------------------------------------------------- make persistent sub make_persistent { + my %save = %{shift()}; my $persistent=''; - - foreach (keys %ENV) { - if (/^form\./ && !/submit/) { - my $name=$_; - my $key=$name; - $ENV{$key}=~s/\'//g; # do not mess with html field syntax + foreach my $name (keys %save) { + if ($name =~ /^form\./ && $name !~ /submit/) { + my @values = (ref($save{$name}) ? @{$save{$name}} : ($save{$name})); $name=~s/^form\.//; - $persistent.=< + foreach (@values) { + s/\"/\'/g; # do not mess with html field syntax + next if (! $_ ); + $persistent.=< END + } } } return $persistent; } -# --------------------------------------------------------- Various form fields +###################################################################### +# HTML form building functions # +###################################################################### + +=pod + +=item HTML form building functions + +=over 4 + +=cut + +############################################### +############################################### + +=pod + +=item &simpletextfield() + +Inputs: $name,$value,$size + +Returns a text input field with the given name, value, and size. +If size is not specified, a value of 20 is used. + +=cut + +############################################### +############################################### sub simpletextfield { - my ($name,$value)=@_; - return ''; + my ($name,$value,$size)=@_; + $size = 20 if (! defined($size)); + return ''; } +############################################### +############################################### + +=pod + +=item &simplecheckbox() + +Inputs: $name,$value + +Returns a simple check box with the given $name. +If $value eq 'on' the box is checked. + +=cut + +############################################### +############################################### + sub simplecheckbox { my ($name,$value)=@_; my $checked=''; - $checked="CHECKED" if $value eq 'on'; - return ''; + $checked="checked" if $value eq 'on'; + return ''; } +############################################### +############################################### + +=pod + +=item &fieldtitle() + +Input: $title + +Returns a scalar with html which will display $title as a search +field heading. + +=cut + +############################################### +############################################### + +sub fieldtitle { + my $title = uc(shift()); + return ''.$title. + ': '; +} + +############################################### +############################################### + +=pod + +=item &searchphrasefield() + +Inputs: $title,$name,$value + +Returns html for a title line and an input field for entering search terms. +The entry field (which is where the $name and $value are used) is a 50 column +simpletextfield. The html returned is for a row in a three column table. + +=cut + +############################################### +############################################### + sub searchphrasefield { my ($title,$name,$value)=@_; - my $instruction=<$uctitle:". - " $instruction
". - ''; + return ''.&fieldtitle($title).''. + &simpletextfield($name,$value,50)." \n"; } +############################################### +############################################### + +=pod + +=item &searchphrasefield_with_related() + +Inputs: $title,$name,$value + +Returns html for a title line and an input field for entering search terms +and a check box for 'related words'. The entry field (which is where the +$name and $value are used) is a 50 column simpletextfield. The name of +the related words checkbox is "$name_related". + +=cut + +############################################### +############################################### + +sub searchphrasefield_with_related { + my ($title,$name,$value)=@_; + return ''.&fieldtitle($title).''. + &simpletextfield($name,$value,50).' '. + &simplecheckbox($name.'_related',$ENV{'form.'.$name.'_related'}). + " \n"; +} + +############################################### +############################################### + +=pod + +=item &dateboxes() + +Returns html selection form elements for the specification of +the day, month, and year. + +=cut + +############################################### +############################################### + sub dateboxes { my ($name,$defaultmonth,$defaultday,$defaultyear, $currentmonth,$currentday,$currentyear)=@_; @@ -459,30 +779,123 @@ END return "$month$day$year"; } +############################################### +############################################### + +=pod + +=item &selectbox() + +Returns a scalar containing an html tag. + +=item $default + +The default value of the form. Can be $anyvalue, or in @idlist. + +=item $anyvalue + +The = ". + &Apache::loncommon::languagedescription($ENV{'form.language'}). + "
\n"; } if ($ENV{'form.copyright'} and $ENV{'form.copyright'} ne 'any') { push @queries,"(copyright like \"$ENV{'form.copyright'}\")"; + $pretty_search_string.=$font."copyright = ". + &Apache::loncommon::copyrightdescription($ENV{'form.copyright'}). + "
\n"; } + # # Evaluate date windows my $datequery=&build_date_queries( $ENV{'form.creationdatestart_month'}, @@ -554,55 +993,86 @@ sub advancedsearch { # Test to see if date windows are legitimate if ($datequery=~/^Incorrect/) { &output_date_error($r,$datequery); - return OK; - } - elsif ($datequery) { + return ; + } elsif ($datequery) { + # Here is where you would set up pretty_search_string to output + # date query information. push @queries,$datequery; } - # Process form information for custom metadata querying - my $customquery=''; + my $customquery=undef; if ($ENV{'form.custommetadata'}) { + $pretty_search_string .=$font."Custom Metadata Search: ". + $ENV{'form.custommetadata'}."
\n"; $customquery=&build_custommetadata_query('custommetadata', $ENV{'form.custommetadata'}); } - my $customshow=''; + my $customshow=undef; if ($ENV{'form.customshow'}) { + $pretty_search_string .=$font."Custom Metadata Display: ". + $ENV{'form.customshow'}."
\n"; $customshow=$ENV{'form.customshow'}; $customshow=~s/[^\w\s]//g; my @fields=split(/\s+/,$customshow); $customshow=join(" ",@fields); } - # Send query statements over the network to be processed by either the SQL - # database or a recursive scheme of 'grep'-like actions (for custom - # metadata). + ## --------------------------------------------------------------- + ## Deal with restrictions to given domains + ## + my $libraries_to_query = undef; + # $ENV{'form.domains'} can be either a scalar or an array reference. + # We need an array. + my @allowed_domains = (ref($ENV{'form.domains'}) ? @{$ENV{'form.domains'}} + : ($ENV{'form.domains'}) ); + my %domain_hash = (); + my $pretty_domains_string; + foreach (@allowed_domains) { + $domain_hash{$_}++; + } + if ($domain_hash{'any'}) { + $pretty_domains_string = "Searching all domains."; + } else { + if (@allowed_domains > 1) { + $pretty_domains_string = "Searching domains:"; + } else { + $pretty_domains_string = "Searching domain "; + } + foreach (sort @allowed_domains) { + $pretty_domains_string .= "$_ "; + } + foreach (keys(%Apache::lonnet::libserv)) { + if (exists($domain_hash{$Apache::lonnet::hostdom{$_}})) { + push @$libraries_to_query,$_; + } + } + } + $pretty_search_string .= $pretty_domains_string."
\n"; + # if (@queries) { $query=join(" AND ",@queries); $query="select * from metadata where $query"; - my $reply; # reply hash reference - unless ($customquery or $customshow) { - $reply=&Apache::lonnet::metadata_query($query); - } - else { - $reply=&Apache::lonnet::metadata_query($query, - $customquery,$customshow); - } - &output_results('Advanced',$r,$envhash,$customquery,$reply); + } elsif ($customquery) { + $query = ''; } - elsif ($customquery) { - my $reply; # reply hash reference - $reply=&Apache::lonnet::metadata_query('', - $customquery,$customshow); - &output_results('Advanced',$r,$envhash,$customquery,$reply); - } - # should not get to this point - return 'Error. Should not have gone to this point.'; -} - -# --------------------------------------------------- Performing a basic search -sub basicsearch { - my ($r,$envhash)=@_; - my %ENV=%{$envhash}; + return ($query,$customquery,$customshow,$libraries_to_query, + $pretty_search_string); +} + +###################################################################### +###################################################################### + +=pod + +=item &parse_basic_search() + +Parse the basic search form and return a scalar containing an sql query. + +=cut + +###################################################################### +###################################################################### +sub parse_basic_search { + my ($r)=@_; # Clean up fields for safety for my $field ('basicexp') { $ENV{"form.$field"}=~s/[^\w\s\(\)\-]//g; @@ -619,26 +1089,77 @@ sub basicsearch { &output_blank_field_error($r); return OK; } - + my $pretty_search_string = ''.$ENV{'form.basicexp'}.''; + my $search_string = $ENV{'form.basicexp'}; + if ($ENV{'form.related'}) { + my @New_Words; + ($search_string,@New_Words) = &related_version($ENV{'form.basicexp'}); + if (@New_Words) { + $pretty_search_string .= " with related words: @New_Words."; + } else { + $pretty_search_string .= " with no related words."; + } + } + &Apache::lonnet::logthis("Search String: $search_string"); # Build SQL query string based on form page my $query=''; my $concatarg=join('," ",', - ('title', 'author', 'subject', 'notes', 'abstract')); + ('title', 'author', 'subject', 'notes', 'abstract', + 'keywords')); $concatarg='title' if $ENV{'form.titleonly'}; + $query=&build_SQL_query('concat('.$concatarg.')',$search_string); + $pretty_search_string .= "
\n"; + return 'select * from metadata where '.$query,$pretty_search_string; +} - $query=&build_SQL_query('concat('.$concatarg.')',$ENV{'form.'.'basicexp'}); - # Get reply (either a hash reference to filehandles or bad connection) - my $reply=&Apache::lonnet::metadata_query('select * from metadata where '.$query); +###################################################################### +###################################################################### - # Output search results +=pod - &output_results('Basic',$r,$envhash,$query,$reply); +=item &related_version - return OK; -} +Modifies an input string to include related words. Words in the string +are replaced with parenthesized lists of 'OR'd words. For example +"torque" is replaced with "(torque OR word1 OR word2 OR ...)". + +Note: Using this twice on a string is probably silly. + +=cut -# ------------------------------------------------------------- build_SQL_query +###################################################################### +###################################################################### +sub related_version { + my $search_string = shift; + my $result = $search_string; + my %New_Words = (); + while ($search_string =~ /(\w+)/cg) { + my $word = $1; + next if (lc($word) =~ /\b(or|and|not)\b/); + my @Words = &Apache::loncommon::get_related_words($word); + @Words = ($#Words>4? @Words[0..4] : @Words); + foreach (@Words) { $New_Words{$_}++;} + my $replacement = join " OR ", ($word,@Words); + $result =~ s/(\b)$word(\b)/$1($replacement)$2/g; + } + return $result,sort(keys(%New_Words)); +} + +###################################################################### +###################################################################### + +=pod + +=item &build_SQL_query() + +Builds a SQL query string from a logical expression with AND/OR keywords +using Text::Query and &recursive_SQL_query_builder() + +=cut + +###################################################################### +###################################################################### sub build_SQL_query { my ($field_name,$logic_statement)=@_; my $q=new Text::Query('abc', @@ -650,7 +1171,20 @@ sub build_SQL_query { return $sql_query; } -# ------------------------------------------------- build custom metadata query +###################################################################### +###################################################################### + +=pod + +=item &build_custommetadata_query() + +Constructs a custom metadata query using a rather heinous regular +expression. + +=cut + +###################################################################### +###################################################################### sub build_custommetadata_query { my ($field_name,$logic_statement)=@_; my $q=new Text::Query('abc', @@ -660,12 +1194,29 @@ sub build_custommetadata_query { my $matchexp=${$q}{'-parse'}{'-build'}{'matchstring'}; # quick fix to change literal into xml tag-matching # will eventually have to write a separate builder module - my $oldmatchexp=$matchexp; - $matchexp=~s/(\w+)\\\=([\w\\\+]+)/\\\<$1\\\>\[\^\\\<\]\*$2\[\^\\\<\]\*\\\<\\\/$1\\\>/g; + # wordone=wordtwo becomes\[^\<] *wordtwo[^\<]*\<\/wordone\> + $matchexp =~ s/(\w+)\\=([\w\\\+]+)?# wordone=wordtwo is changed to + /\\<$1\\>?# \ + \[\^\\<\]?# [^\<] + \*$2\[\^\\<\]?# *wordtwo[^\<] + \*\\<\\\/$1\\>?# *\<\/wordone\> + /g; return $matchexp; } -# - Recursively parse a reverse notation expression into a SQL query expression +###################################################################### +###################################################################### + +=pod + +=item &recursive_SQL_query_build() + +Recursively constructs an SQL query. Takes as input $dkey and $pattern. + +=cut + +###################################################################### +###################################################################### sub recursive_SQL_query_build { my ($dkey,$pattern)=@_; my @matches=($pattern=~/(\[[^\]|\[]*\])/g); @@ -699,7 +1250,20 @@ sub recursive_SQL_query_build { &recursive_SQL_query_build($dkey,$pattern); } -# ------------------------------------------------------------ Build date query +###################################################################### +###################################################################### + +=pod + +=item &build_date_queries() + +Builds a SQL logic query to check time/date entries. +Also reports errors (check for /^Incorrect/). + +=cut + +###################################################################### +###################################################################### sub build_date_queries { my ($cmonth1,$cday1,$cyear1,$cmonth2,$cday2,$cyear2, $lmonth1,$lday1,$lyear1,$lmonth2,$lday2,$lyear2)=@_; @@ -748,37 +1312,423 @@ sub build_date_queries { return ''; } -# ----------------------------- format and output results based on a reply list -# There are two windows that this function writes to. The main search -# window ("srch") has a listing of the results. A secondary window ("popwin") -# gives the status of the network search (time elapsed, number of machines -# contacted, etc.) +###################################################################### +###################################################################### + +=pod + +=item &output_results() + +Format and output results based on a reply list. +There are two windows that this function writes to. The main search +window ("srch") has a listing of the results. A secondary window ("popwin") +gives the status of the network search (time elapsed, number of machines +contacted, etc.) + +=cut + +###################################################################### +###################################################################### sub output_results { +# &Apache::lonnet::logthis("output_results:".time); my $fnum; # search result counter - my ($mode,$r,$envhash,$query,$replyref)=@_; - my %ENV=%{$envhash}; + my ($mode,$r,$replyref,$hidden)=@_; my %rhash=%{$replyref}; my $compiledresult=''; - my $timeremain=300; + my $timeremain=300; # (seconds) my $elapsetime=0; my $resultflag=0; my $tflag=1; - + ## + ## Set viewing function + ## + my $viewfunction = $Views{$ENV{'form.viewselect'}}; + if (!defined($viewfunction)) { + $r->print("Internal Error - Bad view selected.\n"); + $r->rflush(); + return; + } + # # make query information persistent to allow for subsequent revision - my $persistent=&make_persistent(); + my $persistent=&make_persistent(\%ENV); + # + # Begin producing output + $r->rflush(); + # + # begin showing the cataloged results + my $action = "/adm/searchcat"; + if ($mode eq 'Basic') { + $action .= "?reqinterface=basic"; + } elsif ($mode eq 'Advanced') { + $action .= "?reqinterface=advanced"; + } + $r->print(< +$hidden + + +$importbutton +$closebutton +$persistent +
+CATALOGCONTROLS + # + # make the pop-up window for status + $r->print(&make_popwin(%rhash)); + $r->rflush(); + ## + ## Prepare for the main loop below + ## + my $servercount=0; + my $hitcountsum=0; + my $servernum=(keys %rhash); + my $serversleft=$servernum; + ## + ## Run until we run out of time or we run out of servers + ## + while($serversleft && $timeremain) { + ## + ## %rhash has servers deleted from it as results come in + ## (within the foreach loop below). + ## + foreach my $rkey (sort keys %rhash) { +# &Apache::lonnet::logthis("Server $rkey:".time); + $servercount++; + $compiledresult=''; + my $reply=$rhash{$rkey}; + my @results; + if ($reply eq 'con_lost') { + &popwin_imgupdate($r,$rkey,"srvbad.gif"); + $serversleft--; + delete $rhash{$rkey}; + } else { + # must do since 'use strict' checks for tainting + $reply=~/^([\.\w]+)$/; + my $replyfile=$r->dir_config('lonDaemons').'/tmp/'.$1; + $reply=~/(.*?)\_/; + for (my $counter=0;$counter<2;$counter++) { + if (-e $replyfile && ! -e "$replyfile.end") { + &popwin_imgupdate($r,$rkey,"srvhalf.gif"); + &popwin_js($r,'popwin.hc["'.$rkey.'"]='. + '"still transferring..."'.';'); + } + # Are we finished transferring data? + if (-e "$replyfile.end") { + $serversleft--; + delete $rhash{$rkey}; + if (-s $replyfile) { + &popwin_imgupdate($r,$rkey,"srvgood.gif"); + my $fh; + unless ($fh=Apache::File->new($replyfile)){ + # Is it really appropriate to die on this error? + $r->print('ERROR: file '. + $replyfile.' cannot be opened'); + return OK; + } + @results=<$fh> if $fh; + my $hits =@results; + &popwin_js($r,'popwin.hc["'.$rkey.'"]='. + $hits.';'); + $hitcountsum+=$hits; + &popwin_js($r,'popwin.document.forms.popremain.'. + 'numhits.value='.$hitcountsum.';'); + } else { + &popwin_imgupdate($r,$rkey,"srvempty.gif"); + &popwin_js($r,'popwin.hc["'.$rkey.'"]=0;'); + } + last; + } # end of if ( -e "$replyfile.end") + last unless $timeremain; + sleep 1; # wait for daemons to write files? + $timeremain--; + $elapsetime++; + &popwin_js($r,"popwin.document.popremain.". + "elapsetime.value=$elapsetime;"); + } + &popwin_js($r,'popwin.document.whirly.'. + 'src="/adm/lonIcons/lonanimend.gif";'); + } # end of if ($reply eq 'con_lost') else statement + my %Fields = undef; # Holds the data to be sent to the various + # *_view routines. + my ($extrashow,$customfields,$customhash) = + &handle_custom_fields(\@results); + my @customfields = @$customfields; + my %customhash = %$customhash; + untie %groupsearch_db if (tied %groupsearch_db); + # + if (! tie(%groupsearch_db,'GDBM_File',$diropendb,&GDBM_WRCREAT,0640)) { + $r->print('Unable to tie hash to db '. + 'file'); + } else { + if ($ENV{'form.launch'} eq '1') { + &start_fresh_session(); + } + foreach my $result (@results) { + next if $result=~/^custom\=/; + chomp $result; + next unless $result; + %Fields = &parse_raw_result($result,$rkey); + # + # Check copyright tags and skip results the user cannot use + my (undef,undef,$resdom,$resname) = split('/',$Fields{'url'}); + # Check for priv + if (($Fields{'copyright'} eq 'priv') && + (($ENV{'user.name'} ne $resname) && + ($ENV{'user.domain'} ne $resdom))) { + next; + } + # Check for domain + if (($Fields{'copyright'} eq 'domain') && + ($ENV{'user.domain'} ne $resdom)) { + next; + } + # + $Fields{'extrashow'}=$extrashow; + if ($extrashow) { + foreach my $field (@customfields) { + my $value=''; + $value = $1 if ($customhash{$Fields{'url'}}=~/\<{$field}[^\>]*\>(.*?)\<\/{$field}[^\>]*\>/s); + $Fields{'extrashow'}=~s/\<\!\-\- $field \-\-\>/ $value/g; + } + } + $compiledresult.="\n

\n"; + if ($ENV{'form.catalogmode'} eq 'interactive') { + my $titleesc=$Fields{'title'}; + $titleesc=~s/\'/\\'/; # ' + $compiledresult.=< + +
+END + } + if ($ENV{'form.catalogmode'} eq 'groupsearch') { + $fnum+=0; + $groupsearch_db{"pre_${fnum}_link"}=$Fields{'url'}; + $groupsearch_db{"pre_${fnum}_title"}=$Fields{'title'}; + $compiledresult.=< + + +
+END +# +# + $fnum++; + } + # Render the result into html + $compiledresult.= &$viewfunction(%Fields, hostname => $rkey ); + if ($compiledresult or $servercount!=$servernum) { + $compiledresult.="

"; + } + } + untie %groupsearch_db; + } + if ($compiledresult) { + $resultflag=1; + $r->print($compiledresult); + } + } # 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->print("\n\n"); + $r->rflush(); + return; +} + +########################################################### +########################################################### + +=pod + +=item &parse_raw_result() + +Takes a line from the file of results and parse it. Returns a hash +with keys for the following fields: +'title', 'author', 'subject', 'url', 'keywords', 'version', 'notes', +'abstract', 'mime', 'lang', 'owner', 'copyright', 'creationdate', +'lastrevisiondate'. + +In addition, the following tags are set by calling the appropriate +lonnet function: 'language', 'cprtag', 'mimetag'. + +The 'title' field is set to "Untitled" if the title field is blank. + +'abstract' and 'keywords' are truncated to 200 characters. + +=cut + +########################################################### +########################################################### +sub parse_raw_result { + my ($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'}); + if ($Fields{'author'}=~/^(\s*|error)$/) { + $Fields{'author'}="Unknown Author"; + } + # 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,$pretty_query) = @_; + $mode = lc($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 if ($ENV{'form.catalogmode'} eq 'interactive'){ if (! exists($ENV{'form.mode'}) || $ENV{'form.mode'} ne 'edit') { - $r->print(< function select_data(title,url) { changeTitle(title); @@ -800,7 +1750,7 @@ SCRIPT } elsif ($ENV{'form.mode'} eq 'edit') { my $form = $ENV{'form.form'}; my $element = $ENV{'form.element'}; - $r->print(< function select_data(title,url) { changeURL(url); @@ -820,7 +1770,7 @@ function changeURL(val) { SCRIPT } } - $r->print(< function select_data(title,url) { // alert('DEBUG: Should be storing '+title+' and '+url); @@ -840,7 +1790,7 @@ SCRIPT } SCRIPT - $r->print(< function displayinfo(val) { popwin.document.forms.popremain.sdetails.value=val; @@ -855,79 +1805,65 @@ SCRIPT } SCRIPT - $r->rflush(); - - # begin showing the cataloged results - $r->print(< -

Search Catalog

-CATALOGBEGIN - $r->print(< -$hidden - - -$importbutton -$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 +

$title

+END + if ($pretty_query) { + $result .= "

Search query: $pretty_query

"; } - $r->print('

Search Results

'); - $r->rflush(); - my $servernum=(keys %rhash)+0; + return $result; +} + +###################################################################### +###################################################################### + +=pod + +=item &make_popwin() - # define server grid (shows status of multiple machines) +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) { - # ''+ $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=220'); popwin.focus(); @@ -971,378 +1907,173 @@ 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; - last BLOOP unless $timeremain; - 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') { - &popwin_imgupdate($r,$sn,"srvbad.gif"); - $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 && $tflag) { - &popwin_imgupdate($r,$sn,"srvhalf.gif"); - &popwin_js($r,'popwin.hc["'.$rkey.'"]='. - '"still transferring..."'.';'); - $tflag=0; - } - if (-e "$replyfile.end") { - $bloop--; - $orkey{$rkey}=1; - if (-s $replyfile) { - &popwin_imgupdate($r,$sn,"srvgood.gif"); - 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; - &popwin_js($r,'popwin.hc["'.$rkey.'"]='. - $hitcount{$rkey}.';'); - $hitcountsum+=$hitcount{$rkey}; - &popwin_js($r,'popwin.document.forms.popremain.'. - 'numhits.value='.$hitcountsum.';'); - } - else { - &popwin_imgupdate($r,$sn,"srvempty.gif"); - &popwin_js($r,'popwin.hc["'.$rkey.'"]=0;'); - } - last WLOOP; - } - if ($temp>1) { - sleep 1; - $timeremain--; - $elapsetime++; - last WLOOP; - } - last WLOOP unless $timeremain; - sleep 1; - $timeremain--; - $elapsetime++; - &popwin_js($r,"popwin.document.popremain.". - "elapsetime.value=$elapsetime;"); - $temp++; - } - } - &popwin_js($r,'popwin.document.whirly.'. - 'src="/adm/lonIcons/lonanimend.gif";'); - } - 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 ($title) { $title='Untitled'; } - unless ($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 - $compiledresult.=< -END - if ($ENV{'form.catalogmode'} eq 'interactive') { - my $titleesc=$title; - $titleesc=~s/\'/\\'/; # ' +=item Metadata Viewing Functions - $compiledresult.=< - -
-END - } - if ($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'}; +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. - my $viewselect; - if ($mode eq 'Basic') { - $viewselect=$ENV{'form.basicviewselect'}; - } - elsif ($mode eq 'Advanced') { - $viewselect=$ENV{'form.advancedviewselect'}; - } +=over 4 - 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); - } - - } +=item &detailed_citation_view() - untie %hash; - } - else { - $r->print('Unable to tie hash to db '. - 'file'); - } - if ($compiledresult) { - $resultflag=1; - } - - $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: -END - $result.=&Apache::loncommon::filedescription($mime); - $result.=< -Language: -END - $result.=&Apache::loncommon::languagedescription($lang); - $result.=< -Copyright/Distribution: -END - $result.=&Apache::loncommon::copyrightdescription($copyright); - $result.=< +$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 $cprtag=&Apache::loncommon::copyrightdescription($copyright); + my %values = @_; my $result=<$author
-$title
-$owner -- $lastrevisiondate
-$cprtag
-$extrashow +$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 $mimetag=&Apache::loncommon::filedescription($mime); - my $language=&Apache::loncommon::languagedescription($lang); - my $cprtag=&Apache::loncommon::copyrightdescription($copyright); + my %values = @_; my $result=<URL: $url +URL: $values{'url'}
-Title: $title
-Author(s): $author
-Subject: $subject
-Keyword(s): $keywords
-Notes: $notes
-MIME Type: $mimetag
-Language: $language
-Creation Date: $creationdate
-Last Revision Date: $lastrevisiondate
-Publisher/Owner: $owner
-Copyright/Distribution: $cprtag
-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 $cprtag=&Apache::loncommon::copyrightdescription($copyright); - my $mimetag=&Apache::loncommon::filedescription($mime); - my $language=&Apache::loncommon::languagedescription($lang); + 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>$mimetag</mimetag> +<mime>$values{'mime'}</mime> +<mimetag>$values{'mimetag'}</mimetag> </mimeInfo> <languageInfo> -<language>$lang</language> -<languagetag>$language</languagetag> +<language>$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>$cprtag</copyrighttag> +<copyright>$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/ && $field ne 'any') { @@ -1353,11 +2084,21 @@ sub filled { } } -# ---------------- Message to output when there are not enough fields filled in +###################################################################### +###################################################################### + +=pod + +=item &output_blank_field_error() + +=cut + +###################################################################### +###################################################################### sub output_blank_field_error { my ($r)=@_; # make query information persistent to allow for subsequent revision - my $persistent=&make_persistent(); + my $persistent=&make_persistent(\%ENV); $r->print(< @@ -1387,18 +2128,28 @@ processed. RESULTS } -# ----------------------------------------------------------- Output date error +###################################################################### +###################################################################### + +=pod + +=item &output_date_error() + +Output a full html page with an error message. + +=cut + +###################################################################### +###################################################################### sub output_date_error { my ($r,$message)=@_; # make query information persistent to allow for subsequent revision - my $persistent=&make_persistent(); + my $persistent=&make_persistent(\%ENV); - $r->print(<print(< The LearningOnline Network with CAPA -BEGINNING - $r->print(< @@ -1418,20 +2169,43 @@ $message RESULTS } -# --------- settings whenever the user causes the search window to be launched +###################################################################### +###################################################################### + +=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 $hash{'mode_catalog'}; - foreach (keys %hash) { + delete $groupsearch_db{'mode_catalog'}; + foreach (keys %groupsearch_db) { if ($_ =~ /^pre_/) { - delete $hash{$_}; + delete $groupsearch_db{$_}; } if ($_ =~ /^store/) { - delete $hash{$_}; + delete $groupsearch_db{$_}; } } } -# ----------------------------------------------- send javascript to popwin +###################################################################### +###################################################################### + +=pod + +=item &popwin_js() send javascript to popwin + +=cut + +###################################################################### +###################################################################### sub popwin_js { # Print javascript out to popwin, but make sure we dont generate # any javascript errors in doing so. @@ -1446,242 +2220,32 @@ END $r->rflush(); } -sub popwin_imgupdate { - my ($r,$imgnum,$icon) = @_; - &popwin_js($r,'popwin.document.img'.$imgnum.'.'. - 'src="/adm/lonIcons/'.$icon.'";'); -} - -1; - -__END__ - -=head1 NAME - -Apache::lonsearchcat - mod_perl module for handling a searchable catalog - -=head1 SYNOPSIS - -Invoked by /etc/httpd/conf/srm.conf: - - - PerlAccessHandler Apache::lonacc - SetHandler perl-script - PerlHandler Apache::lonsearchcat - ErrorDocument 403 /adm/login - ErrorDocument 500 /adm/errorhandler - - -=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 %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 +=pod -=item * +=item &popwin_imgupdate() -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 - -=over 4 +Send a given image (and its location) out to the browser. Takes as +input $r, loncapa server id, and an icon URL. -=item * - -filled(field) : determines whether a given field has been filled - -=back - -ERROR FUNCTIONS - -=over 4 +=cut -=item * +###################################################################### +###################################################################### +sub popwin_imgupdate { + my ($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