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Diff for /loncom/interface/lonsearchcat.pm between versions 1.116 and 1.204

version 1.116, 2002/03/07 20:12:36 version 1.204, 2004/03/03 17:25:23
Line 25 Line 25
 #  #
 # http://www.lon-capa.org/  # 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  
 # 10/12,10/14,10/15,10/16,11/28,11/29,12/10,12/12,12/16 Scott Harrison  =pod 
 # YEAR=2002  
 # 1/17 Scott Harrison  =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                                                      ##  
 ##                                                                           ##  
 ###############################################################################  ###############################################################################
   
 package Apache::lonsearchcat;  package Apache::lonsearchcat;
   
 # ------------------------------------------------- modules used by this module  
 use strict;  use strict;
 use Apache::Constants qw(:common);  use Apache::Constants qw(:common :http);
 use Apache::lonnet();  use Apache::lonnet();
 use Apache::File();  use Apache::File();
 use CGI qw(:standard);  use CGI qw(:standard);
 use Text::Query;  use Text::Query;
 use GDBM_File;  use GDBM_File;
 use Apache::loncommon();  use Apache::loncommon();
   use Apache::lonmysql();
   use Apache::lonmeta;
   use Apache::lonhtmlcommon;
   use Apache::lonlocal;
   use LONCAPA::lonmetadata();
   
   ######################################################################
   ######################################################################
   ##
   ## Global variables
   ##
   ######################################################################
   ######################################################################
   my %groupsearch_db;  # Database hash used to save values for the 
                        # groupsearch RAT interface.
   my %persistent_db;   # gdbm hash which holds data which is supposed to
                        # persist across calls to lonsearchcat.pm
   
   # The different view modes and associated functions
   
   my %Views = ("detailed" => \&detailed_citation_view,
        "summary"  => \&summary_view,
        "fielded"  => \&fielded_format_view,
        "xml"      => \&xml_sgml_view,
        "compact"  => \&compact_view);
   
 # ---------------------------------------- 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  
   
 # -- dynamically rendered interface components  
 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;  
 <select name='basicviewselect'>  
 <option value='Detailed Citation View'>Detailed Citation View</option>  
 <option value='Summary View'>Summary View</option>  
 <option value='Fielded Format'>Fielded Format</option>  
 <option value='XML/SGML'>XML/SGML</option>  
 </select>  
 END  
 my $advancedviewselect=<<END;  
 <select name='advancedviewselect'>  
 <option value='Detailed Citation View'>Detailed Citation View</option>  
 <option value='Summary View'>Summary View</option>  
 <option value='Fielded Format'>Fielded Format</option>  
 <option value='XML/SGML'>XML/SGML</option>  
 </select>  
 END  
   
 # ----------------------------------------------------------------------- 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 $diropendb = "";  
 my $domain = "";  
   
 # ----------------------------- Handling routine called via Apache and mod_perl  
 sub handler {  sub handler {
     my $r = shift;      my $r = shift;
     untie %hash;  #    &set_defaults();
       #
     $r->content_type('text/html');      # set form defaults
       #
       my $hidden_fields;# Hold all the hidden fields used to keep track
                         # of the search system state
       my $importbutton; # button to take the selected results and go to group 
                         # sorting
       my $diropendb;    # The full path to the (temporary) search database file.
                         # This is set and used in &handler() and is also used in 
                         # &output_results().
       my $bodytag;  # LON-CAPA standard body tag, gotten from 
                     # &Apache::lonnet::bodytag. 
                     # No title, no table, just a <body> tag.
   
       my $loaderror=&Apache::lonnet::overloaderror($r);
       if ($loaderror) { return $loaderror; }
   
       my $closebutton;  # button that closes the search window 
                         # This button is different for the RAT compared to
                         # normal invocation.
       #
       &Apache::loncommon::content_type($r,'text/html');
     $r->send_http_header;      $r->send_http_header;
     return OK if $r->header_only;      return OK if $r->header_only;
       ##
     $domain  = $r->dir_config('lonDefDomain');      ## Prevent caching of the search interface window.  Hopefully this means
     $diropendb= "/home/httpd/perl/tmp/$domain\_$ENV{'user.name'}_searchcat.db";      ## we will get the launch=1 passed in a little more.
       &Apache::loncommon::no_cache($r);
       ## 
       ## Pick up form fields passed in the links.
       ##
     &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},      &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
              ['catalogmode','launch','acts']);               ['catalogmode','launch','acts','mode','form','element','pause',
                 'phase','persistent_db_id','table','start','show',
     if ($ENV{'form.launch'} eq '1') {                'cleargroupsort','titleelement']);
  if (tie(%hash,'GDBM_File',$diropendb,&GDBM_WRCREAT,0640)) {      ##
       ## The following is a trick - we wait a few seconds if asked to so
       ##     the daemon running the search can get ahead of the daemon
       ##     printing the results.  We only need (theoretically) to do
       ##     this once, so the pause indicator is deleted
       ##
       if (exists($ENV{'form.pause'})) {
           sleep(1);
           delete($ENV{'form.pause'});
       }
       ##
       ## Initialize global variables
       ##
       my $domain  = $r->dir_config('lonDefDomain');
       $diropendb= "/home/httpd/perl/tmp/$ENV{'user.domain'}_$ENV{'user.name'}_searchcat.db";
       #
       # set the name of the persistent database
       #          $ENV{'form.persistent_db_id'} can only have digits in it.
       if (! exists($ENV{'form.persistent_db_id'}) ||
           ($ENV{'form.persistent_db_id'} =~ /\D/) ||
           ($ENV{'form.launch'} eq '1')) {
           $ENV{'form.persistent_db_id'} = time;
       }
       $bodytag=&Apache::loncommon::bodytag(undef,undef,undef,1);
       my $persistent_db_file = "/home/httpd/perl/tmp/".
           &Apache::lonnet::escape($domain).
               '_'.&Apache::lonnet::escape($ENV{'user.name'}).
                   '_'.$ENV{'form.persistent_db_id'}.'_persistent_search.db';
       ##
       if (! &get_persistent_form_data($persistent_db_file)) {
           if ($ENV{'form.phase'} =~ /(run_search|results)/) {
               &Apache::lonnet::logthis("lonsearchcat:Unable to recover data ".
                                        "from $persistent_db_file");
               $r->print(<<END);
   <html>
   <head><title>LON-CAPA Search Error</title></head>
   $bodytag
   We were unable to retrieve data describing your search.  This is a serious
   error and has been logged.  Please alert your LON-CAPA administrator.
   </body>
   </html>
   END
               return OK;
           }
       }
       ##
       ## Clear out old values from groupsearch database
       ##
       untie %groupsearch_db if (tied(%groupsearch_db));
       if (($ENV{'form.cleargroupsort'} eq '1') || 
           (($ENV{'form.launch'} eq '1') && 
            ($ENV{'form.catalogmode'} eq 'groupsearch'))) {
    if (tie(%groupsearch_db,'GDBM_File',$diropendb,&GDBM_WRCREAT(),0640)) {
     &start_fresh_session();      &start_fresh_session();
     untie %hash;      untie %groupsearch_db;
  }              delete($ENV{'form.cleargroupsort'});
  else {   } else {
     $r->print('<html><head></head><body>Unable to tie hash to db '.              # This is a stupid error to give to the user.  
       'file</body></html>');              # It really tells them nothing.
       $r->print('<html><head></head>'.$bodytag.
                         'Unable to tie hash to db file</body></html>');
     return OK;      return OK;
  }   }
     }      }
       ##
 # ----------------------------------- configure dynamic components of interface      ## Configure hidden fields
     my $hidden='';      ##
       $hidden_fields = '<input type="hidden" name="persistent_db_id" value="'.
           $ENV{'form.persistent_db_id'}.'" />'."\n";
       if (exists($ENV{'form.catalogmode'})) {
           $hidden_fields .= '<input type="hidden" name="catalogmode" value="'.
                   $ENV{'form.catalogmode'}.'" />'."\n";
       }
       if (exists($ENV{'form.form'})) {
           $hidden_fields .= '<input type="hidden" name="form" value="'.
                   $ENV{'form.form'}.'" />'."\n";
       }
       if (exists($ENV{'form.element'})) {
           $hidden_fields .= '<input type="hidden" name="element" value="'.
                   $ENV{'form.element'}.'" />'."\n";
       }
       if (exists($ENV{'form.titleelement'})) {
           $hidden_fields .= '<input type="hidden" name="titleelement" value="'.
                   $ENV{'form.titleelement'}.'" />'."\n";
       }
       if (exists($ENV{'form.mode'})) {
           $hidden_fields .= '<input type="hidden" name="mode" value="'.
                   $ENV{'form.mode'}.'" />'."\n";
       }
       ##
       ## Configure dynamic components of interface
       ##
     if ($ENV{'form.catalogmode'} eq 'interactive') {      if ($ENV{'form.catalogmode'} eq 'interactive') {
  $hidden="<input type='hidden' name='catalogmode' value='interactive'>".          $closebutton="<input type='button' name='close' value='CLOSE' ";
     "\n";          if ($ENV{'form.phase'} =~ /(results|run_search)/) {
         $closebutton="<input type='button' name='close' value='CLOSE' ".      $closebutton .="onClick='parent.close()'";
     "onClick='self.close()'>"."\n";          } else {
     }              $closebutton .="onClick='self.close()'";
     elsif ($ENV{'form.catalogmode'} eq 'groupsearch') {          }
  $hidden=<<END;          $closebutton .=">\n";
 <input type='hidden' name='catalogmode' value='groupsearch'>      } elsif ($ENV{'form.catalogmode'} eq 'groupsearch') {
 END          $closebutton="<input type='button' name='close' value='CLOSE' ";
         $closebutton=<<END;          if ($ENV{'form.phase'} =~ /(results|run_search)/) {
 <input type='button' name='close' value='CLOSE' onClick='self.close()'>      $closebutton .="onClick='parent.close()'";
 END          } else {
               $closebutton .="onClick='self.close()'";
           }
           $closebutton .= ">";
         $importbutton=<<END;          $importbutton=<<END;
 <input type='button' name='import' value='IMPORT'  <input type='button' name='import' value='IMPORT'
 onClick='javascript:select_group()'>  onClick='javascript:select_group()'>
 END  END
       } else {
           $closebutton = '';
           $importbutton = '';
       }
       ##
       ## Sanity checks on form elements
       ##
       if (!defined($ENV{'form.viewselect'})) {
           if (($ENV{'form.catalogmode'} eq 'groupsearch') ||
               ($ENV{'form.catalogmode'} eq 'interactive')) {
               $ENV{'form.viewselect'} ="Compact View";
           } else {
               $ENV{'form.viewselect'} ="Detailed Citation View";
           }
     }      }
       $ENV{'form.phase'} = 'disp_basic' if (! exists($ENV{'form.phase'}));
       $ENV{'form.show'} = 20 if (! exists($ENV{'form.show'}));
       ##
       ## Switch on the phase
       ##
       if ($ENV{'form.phase'} eq 'disp_basic') {
           &print_basic_search_form($r,$closebutton,$hidden_fields);
       } elsif ($ENV{'form.phase'} eq 'disp_adv') {
           &print_advanced_search_form($r,$closebutton,$hidden_fields);
       } elsif ($ENV{'form.phase'} eq 'results') {
           &display_results($r,$importbutton,$closebutton,$diropendb);
       } elsif ($ENV{'form.phase'} =~ /^(sort|run_search)$/) {
           my ($query,$customquery,$customshow,$libraries,$pretty_string) =
               &get_persistent_data($persistent_db_file,
                    ['query','customquery','customshow',
                     'libraries','pretty_string']);
           if ($ENV{'form.phase'} eq 'sort') {
               &print_sort_form($r,$pretty_string);
           } elsif ($ENV{'form.phase'} eq 'run_search') {
               &run_search($r,$query,$customquery,$customshow,
                           $libraries,$pretty_string);
           }
       } elsif ($ENV{'form.phase'} eq 'course_search') {
           &course_search($r);
       } elsif(($ENV{'form.phase'} eq 'basic_search') ||
               ($ENV{'form.phase'} eq 'adv_search')) {
           $ENV{'form.searchmode'} = 'basic';
           if ($ENV{'form.phase'} eq 'adv_search') {
               $ENV{'form.searchmode'} = 'advanced';
           }
           # Set up table
           if (! defined(&create_results_table())) {
       my $errorstring=&Apache::lonmysql::get_error();
               $r->print(<<END);
   <html><head><title>Search Error</title></head>
   $bodytag
   Unable to create table in which to store search results.  
   The search has been aborted.
   <br />$errorstring
   </body>
   </html>
   END
               return OK;
           }
           delete($ENV{'form.launch'});
           if (! &make_form_data_persistent($r,$persistent_db_file)) {
               $r->print(<<END);
   <html><head><title>Search Error</title></head>
   $bodytag
   Unable to properly store search information.  The search has been aborted.
   </body>
   </html>
   END
               return OK;
           }
           #
           # We are running a search
           my ($query,$customquery,$customshow,$libraries) = 
               (undef,undef,undef,undef);
           my $pretty_string;
           if ($ENV{'form.phase'} eq 'basic_search') {
               ($query,$pretty_string,$libraries) = 
                   &parse_basic_search($r,$closebutton,$hidden_fields);
           } else {                      # Advanced search
               ($query,$customquery,$customshow,$libraries,$pretty_string) 
                   = &parse_advanced_search($r,$closebutton,$hidden_fields);
               return OK if (! defined($query));
           }
           &make_persistent({ query => $query,
                              customquery => $customquery,
                              customshow => $customshow,
                              libraries => $libraries,
                              pretty_string => $pretty_string },
                            $persistent_db_file);
           ##
           ## Print out the frames interface
           ##
           &print_frames_interface($r);
       }
       return OK;
   } 
   
 # ------------------------------------------------------ Determine current user  ######################################################################
     $yourself=$ENV{'user.name'}.'@'.$ENV{'user.domain'};  ######################################################################
   ##
 # --- Now, depending on the interface actions, do one of three things here:  ##   Course Search
 # --- 1. a basic search  ##
 # --- 2. an advanced search  ######################################################################
 # --- 3. output a search interface  ######################################################################
   {   # Scope the course search to avoid global variables
   #
   # Variables For course search
   my %alreadyseen;
   my %hash;
   my $totalfound;
   
 # ----------------------------------- See if a search invocation should be done  sub course_search {
     if ($ENV{'form.basicsubmit'} eq 'SEARCH') {      my $r=shift;
  untie %hash; return &basicsearch($r,\%ENV);      my $bodytag=&Apache::loncommon::bodytag('Course Search').
    &Apache::loncommon::help_open_bug('Searching');
       my $pretty_search_string = '<b>'.$ENV{'form.courseexp'}.'</b>';
       my $search_string = $ENV{'form.courseexp'};
       my @New_Words;
       if ($ENV{'form.crsrelated'}) {
           ($search_string,@New_Words) = &related_version($ENV{'form.courseexp'});
           if (@New_Words) {
               $pretty_search_string .= ' '.&mt("with related words").": <b>@New_Words</b>.";
           } else {
               $pretty_search_string .= ' '.&mt('with no related words').".";
           }
     }      }
     elsif ($ENV{'form.advancedsubmit'} eq 'SEARCH') {      my $fulltext=$ENV{'form.crsfulltext'};
  untie %hash; return &advancedsearch($r,\%ENV);      my @allwords=($search_string,@New_Words);
       $totalfound=0;
       $r->print('<html><head><title>LON-CAPA Course Search</title></head>'.
         $bodytag.'<hr /><center><font size="+2" face="arial">'.$pretty_search_string.'</font></center><hr />');
       $r->rflush();
   # ======================================================= Go through the course
       undef %alreadyseen;
       %alreadyseen=();
       my $c=$r->connection;
       if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.".db",
               &GDBM_READER(),0640)) {
           foreach (keys %hash) {
               if ($c->aborted()) { last; }
               if (($_=~/^src\_(.+)$/) && (!$alreadyseen{$hash{$_}})) {
                   &checkonthis($r,$hash{$_},0,$hash{'title_'.$1},$fulltext,
                                @allwords);
               }
           }
           untie(%hash);
     }      }
       unless ($totalfound) {
    $r->print('<p>'.&mt('No resources found').'.</p>');
       }
   # =================================================== Done going through course
       $r->print('</body></html>');
   }
   
 # ----------------------------- Else, begin building search interface to output  # =============================== This pulls up a resource and its dependencies
     $scrout=''; # building a part of screen output  
     $scrout.=&searchphrasefield('Limit by title','title',  
  $ENV{'form.title'});  
   
     $scrout.=&searchphrasefield('Limit by author','author',  
  $ENV{'form.author'});  
   
     $scrout.=&searchphrasefield('Limit by subject','subject',  
  $ENV{'form.subject'});  
   
     $scrout.=&searchphrasefield('Limit by keywords','keywords',  
  $ENV{'form.keywords'});  
   
     $scrout.=&searchphrasefield('Limit by URL','url',  
  $ENV{'form.url'});  
   
 #    $scrout.=&searchphrasefield('Limit by version','version',  sub checkonthis {
 # $ENV{'form.version'});      my ($r,$url,$level,$title,$fulltext,@allwords)=@_;
       $alreadyseen{$url}=1;
       $r->rflush();
       my $result=&Apache::lonnet::metadata($url,'title').' '.
                  &Apache::lonnet::metadata($url,'subject').' '.
                  &Apache::lonnet::metadata($url,'abstract').' '.
                  &Apache::lonnet::metadata($url,'keywords');
       if (($url) && ($fulltext)) {
    $result.=&Apache::lonnet::ssi_body($url);
       }
       $result=~s/\s+/ /gs;
       my $applies=0;
       foreach (@allwords) {
           if ($_=~/\w/) {
      if ($result=~/$_/si) {
         $applies++;
              }
          }
       }
   # Does this resource apply?
       if ($applies) {
          $r->print('<br />');
          for (my $i=0;$i<=$level*5;$i++) {
              $r->print('&nbsp;');
          }
          $r->print('<a href="'.$url.'" target="cat">'.
    ($title?$title:$url).'</a><br />');
          $totalfound++;
       } elsif ($fulltext) {
          $r->print(' .');
       }
       $r->rflush();
   # Check also the dependencies of this one
       my $dependencies=
                   &Apache::lonnet::metadata($url,'dependencies');
       foreach (split(/\,/,$dependencies)) {
          if (($_=~/^\/res\//) && (!$alreadyseen{$_})) {
             &checkonthis($r,$_,$level+1,'',$fulltext,@allwords);
          }
       }
   }
   
     $scrout.=&searchphrasefield('Limit by notes','notes',  sub untiehash {
  $ENV{'form.notes'});      if (tied(%hash)) {
           untie(%hash);
       }
   }
   
     $scrout.=&searchphrasefield('Limit by abstract','abstract',  } # End of course search scoping
  $ENV{'form.abstract'});  
   
     $ENV{'form.mime'}='any' unless length($ENV{'form.mime'});  ######################################################################
     $scrout.=&selectbox('Limit by MIME type','mime',  ######################################################################
  $ENV{'form.mime'},  
  'any','Any type',  
  \&{Apache::loncommon::filedescriptionex},  
  (&Apache::loncommon::fileextensions));  
   
     $ENV{'form.language'}='any' unless length($ENV{'form.language'});  =pod 
   
     $scrout.=&selectbox('Limit by language','language',  =item &print_basic_search_form() 
  $ENV{'form.language'},'any','Any Language',  
  \&{Apache::loncommon::languagedescription},  
  (&Apache::loncommon::languageids),  
  );  
   
 # ------------------------------------------------ Compute date selection boxes  Prints the form for the basic search.  Sorry the name is so cryptic.
     $scrout.=<<CREATIONDATESTART;  
 <p>  
 <font color="#800000" face="helvetica"><b>LIMIT BY CREATION DATE RANGE:</b>  
 </font>  
 <br />  
 between:  
 CREATIONDATESTART  
     $scrout.=&dateboxes('creationdatestart',1,1,1976,  
  $ENV{'form.creationdatestart_month'},  
  $ENV{'form.creationdatestart_day'},  
  $ENV{'form.creationdatestart_year'},  
  );  
     $scrout.=<<CREATIONDATEEND;  
 and:  
 CREATIONDATEEND  
     $scrout.=&dateboxes('creationdateend',12,31,2051,  
  $ENV{'form.creationdateend_month'},  
  $ENV{'form.creationdateend_day'},  
  $ENV{'form.creationdateend_year'},  
  );  
     $scrout.="</p>";  
   
     $scrout.=<<LASTREVISIONDATESTART;  =cut
 <p>  
 <font color="#800000" face="helvetica"><b>LIMIT BY LAST REVISION DATE RANGE:  
 </b></font>  
 <br />between:  
 LASTREVISIONDATESTART  
     $scrout.=&dateboxes('lastrevisiondatestart',1,1,1976,  
  $ENV{'form.lastrevisiondatestart_month'},  
  $ENV{'form.lastrevisiondatestart_day'},  
  $ENV{'form.lastrevisiondatestart_year'},  
  );  
     $scrout.=<<LASTREVISIONDATEEND;  
 and:  
 LASTREVISIONDATEEND  
     $scrout.=&dateboxes('lastrevisiondateend',12,31,2051,  
  $ENV{'form.lastrevisiondateend_month'},  
  $ENV{'form.lastrevisiondateend_day'},  
  $ENV{'form.lastrevisiondateend_year'},  
  );  
     $scrout.='</p>';  
   
     $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'},  
  'any','Any copyright/distribution',  
  \&{Apache::loncommon::copyrightdescription},  
  (&Apache::loncommon::copyrightids),  
  );  
   
 # ------------------------------------------- Compute customized metadata field  
     $scrout.=<<CUSTOMMETADATA;  
 <p>  
 <font color="#800000" face="helvetica"><b>LIMIT BY SPECIAL METADATA FIELDS:</b>  
 </font>  
 For resource-specific metadata, enter in an expression in the form of   
 <i>key</i>=<i>value</i> separated by operators such as AND, OR or NOT.<br />  
 <b>Example:</b> grandmother=75 OR grandfather=85  
 <br />  
 CUSTOMMETADATA  
 $scrout.=&simpletextfield('custommetadata',$ENV{'form.custommetadata'});  
 $scrout.=' <i>initial users of this system do not need to worry about this option</i>';  
   
     $scrout.=<<CUSTOMSHOW;  
 <p>  
 <font color="#800000" face="helvetica"><b>SHOW SPECIAL METADATA FIELDS:</b>  
 </font>  
 Enter in a space-separated list of special metadata fields to show  
 in a fielded listing for each record result.  
 <br />  
 CUSTOMSHOW  
 $scrout.=&simpletextfield('customshow',$ENV{'form.customshow'});  
 $scrout.=' <i>initial users of this system do not need to worry about this option</i>';  
   
 # ---------------------------------------------------------------- Print screen  ######################################################################
     $r->print(<<ENDDOCUMENT);  ######################################################################
   sub print_basic_search_form {
       my ($r,$closebutton,$hidden_fields) = @_;
       my $bodytag=&Apache::loncommon::bodytag('Search').
    &Apache::loncommon::help_open_topic('Finding_Resources').
    &Apache::loncommon::help_open_bug('Searching');
       my $scrout=<<"ENDDOCUMENT";
 <html>  <html>
 <head>  <head>
 <title>The LearningOnline Network with CAPA</title>  <title>The LearningOnline Network with CAPA</title>
Line 311  $scrout.=' <i>initial users of this syst Line 484  $scrout.=' <i>initial users of this syst
     }      }
 </script>  </script>
 </head>  </head>
 <body bgcolor="#FFFFFF">  $bodytag
 <img align='right' src='/adm/lonIcons/lonlogos.gif' />  ENDDOCUMENT
 <h1>Search Catalog</h1>  if (&Apache::lonnet::allowed('bre',$ENV{'request.role.domain'})) {
 <form method="post" action="/adm/searchcat">      my $CatalogSearch=&mt('Catalog Search');
 $hidden      my $Statement=&searchhelp();
 <hr />      $scrout.=(<<ENDDOCUMENT);
 <h3>Basic Search</h3>  <h1>$CatalogSearch</h1>
   <form name="loncapa_search" method="post" action="/adm/searchcat">
   <input type="hidden" name="phase" value="basic_search" />
   $hidden_fields
 <p>  <p>
 Enter terms or phrases separated by search operators  $Statement.
 such as AND, OR, or NOT then press SEARCH below.  Terms should be specific  </p>
 to the title, author, subject, notes, or abstract information associated  <p>
 with a resource.  <table>
 <br />  <tr><td>
 ENDDOCUMENT  ENDDOCUMENT
     $r->print(&simpletextfield('basicexp',$ENV{'form.basicexp'}));      $scrout.='&nbsp;'.&Apache::lonhtmlcommon::textbox('basicexp',
     $r->print(' ');                                              $ENV{'form.basicexp'},40).
     $r->print(&simplecheckbox('titleonly',$ENV{'form.titleonly'}));          '&nbsp;';
     $r->print('<font color="#800000">Title only</font> ');      my $relatedcheckbox = &Apache::lonhtmlcommon::checkbox('related',
 #    $r->print(&simplecheckbox('allversions',$ENV{'form.allversions'}));   $ENV{'form.related'});
 # <font color="#800000">Search historic archives</font>      my $domain = $r->dir_config('lonDefDomain');
     $r->print(<<ENDDOCUMENT);      my $domaincheckbox = &Apache::lonhtmlcommon::checkbox('domains',
 <br />   $ENV{'form.domains'});
 <input type="submit" name="basicsubmit" value='SEARCH' />      my $srch=&mt('Search');
 <input type="reset" name="reset" value='RESET' />      my $header=&mt('Advanced Search');
 $closebutton      my $userelatedwords=&mt('use related words');
 $basicviewselect      my $onlysearchdomain=&mt('only search domain');
 <input type="button" value="HELP" onClick="openhelp()" />      my $view=&viewoptions();
       $scrout.=<<END;
   </td><td><a
   href="/adm/searchcat?phase=disp_adv&catalogmode=$ENV{'form.catalogmode'}&launch=$ENV{'form.launch'}&mode=$ENV{'form.mode'}"
   >$header</a></td></tr>
   <tr><td>$relatedcheckbox $userelatedwords</td>
       <td>$domaincheckbox $onlysearchdomain <b>$domain</b></td></tr>
   </table>
 </p>  </p>
 <hr />  $view
 <h3>Advanced Search</h3>  
 $scrout  
 <p>  <p>
 <input type="submit" name="advancedsubmit" value='SEARCH' />  &nbsp;<input type="submit" name="basicsubmit" value='$srch' />&nbsp;
 <input type="reset" name="reset" value='RESET' />  
 $closebutton  $closebutton
 $advancedviewselect  END
 <input type="button" value="HELP" onClick="openhelp()" />      $scrout.=<<ENDDOCUMENT;
 </p>  </p>
 </form>  </form>
   ENDDOCUMENT
       }
       if ($ENV{'request.course.id'}) {
    my %lt=&Apache::lonlocal::texthash(
      'srch' => 'Search',
                                              'header' => 'Course Search',
    'note' => 'Enter terms or phrases, then press "Search" below',
    'use' => 'use related words',
    'full' =>'fulltext search (time consuming)'
      );
           $scrout.=(<<ENDCOURSESEARCH);
   <hr />
   <h1>$lt{'header'}</h1>    
   <form name="course_search" method="post" action="/adm/searchcat">
   <input type="hidden" name="phase" value="course_search" />
   $hidden_fields
   <p>
   $lt{'note'}.
   </p>
   <p>
   <table>
   <tr><td>
   ENDCOURSESEARCH
           $scrout.='&nbsp;'.
               &Apache::lonhtmlcommon::textbox('courseexp',
                                     $ENV{'form.courseexp'},40);
           my $crscheckbox = 
               &Apache::lonhtmlcommon::checkbox('crsfulltext',
                                      $ENV{'form.crsfulltext'});
           my $relcheckbox = 
               &Apache::lonhtmlcommon::checkbox('crsrelated',
      $ENV{'form.crsrelated'});
           $scrout.=(<<ENDENDCOURSE);
   </td></tr>
   <tr><td>$relcheckbox $lt{'use'}</td><td></td></tr>
   <tr><td>$crscheckbox $lt{'full'}</td><td></td></tr>
   </table><p>
   &nbsp;<input type="submit" name="coursesubmit" value='$lt{'srch'}' />
   </p>
   ENDENDCOURSE
       }
       $scrout.=(<<ENDDOCUMENT);
 </body>  </body>
 </html>  </html>
 ENDDOCUMENT  ENDDOCUMENT
     return OK;      $r->print($scrout);
 }       return;
   }
   ######################################################################
   ######################################################################
   
 # ------------------------------------------------------------- make persistent  =pod 
 sub make_persistent {  
     my $persistent='';  =item &advanced_search_form() 
       
     foreach (keys %ENV) {  Prints the advanced search form.
  if (/^form\./ && !/submit/) {  
     my $name=$_;  =cut
     my $key=$name;  
     $ENV{$key}=~s/\'//g; # do not mess with html field syntax  ######################################################################
     $name=~s/^form\.//;  ######################################################################
     $persistent.=<<END;  sub print_advanced_search_form{
 <input type='hidden' name='$name' value='$ENV{$key}' />      my ($r,$closebutton,$hidden_fields) = @_;
       my %lt=&Apache::lonlocal::texthash('srch' => 'Search',
          'reset' => 'Reset',
          'help' => 'Help');
       my $advanced_buttons = <<"END";
   <p>
   <input type="submit" name="advancedsubmit" value='$lt{"srch"}' />
   <input type="reset" name="reset" value='$lt{"reset"}' />
   $closebutton
   <input type="button" value="$lt{'help'}" onClick="openhelp()" />
   </p>
 END  END
         }      my $bodytag=&Apache::loncommon::bodytag('Advanced Catalog Search');
       my $searchhelp=&searchhelp();
       my $scrout=<<"ENDHEADER";
   <html>
   <head>
   <title>The LearningOnline Network with CAPA</title>
   <script type="text/javascript">
       function openhelp(val) {
    openhelpwin=open('/adm/help/searchcat.html','helpscreen',
        'scrollbars=1,width=600,height=300');
    openhelpwin.focus();
     }      }
     return $persistent;  </script>
   </head>
   $bodytag
   $searchhelp
   <form method="post" action="/adm/searchcat" name="advsearch">
   $advanced_buttons
   $hidden_fields
   <input type="hidden" name="phase" value="adv_search" />
   ENDHEADER
       $scrout.=&viewoptions();
       my %fields=&Apache::lonmeta::fieldnames();
   
       $scrout.='<table>';
       $scrout.="<tr><th>".&mt('Field').'</th><th>'.&mt('Value').'</th><th>'
    .&mt('Related').'<br />'.&mt('Words')."</td></tr>\n";
       foreach ('title','author','owner','authorspace','modifyinguser',
        'keywords','notes','abstract','standards',
        'lowestgradelevel','highestgradelevel','mime') {
    $scrout.='<tr bgcolor="#FFFFBB"><td>'.&titlefield($fields{$_}).'</td><td>'.
       &Apache::lonmeta::prettyinput($_,$ENV{'form.'.$_},$_,'advsearch',
     1,'</td><td>',$ENV{'form.'.$_.'_related'}).
       '</td></tr>';
       }
       $scrout.='<tr bgcolor="#FFFFBB"><td>'.
    &titlefield(&mt('MIME Type Category')).'</td><td>'. 
       &Apache::loncommon::filecategoryselect('category',
      $ENV{'form.category'}).
       '</td><td>&nbsp;</td></td></tr>';
       $scrout.='<tr bgcolor="#FFFFBB"><td>'.
    &titlefield(&mt('Limit Search to Domains')).'</td><td>'. 
       &Apache::loncommon::domain_select('domains',
      $ENV{'form.domains'},1).
       '</td><td>&nbsp;</td></td></tr>';
       my %dates=&Apache::lonlocal::texthash
           ('creationdatestart'     => 'Creation Date After',
            'creationdateend'       => 'Creation Date Before',
            'lastrevisiondatestart' => 'Last Revision Date After',
            'lastrevisiondateend'   => 'Last Revision Date Before');
       foreach (sort keys %dates) {
    $scrout.='<tr bgcolor="#FFFFBB">'.
               '<td>'.&titlefield($dates{$_}).'</td><td>'. 
       &Apache::lonhtmlcommon::date_setter('advsearch',$_,0,'',1).
       '</td><td>&nbsp;</td></td>'.
               '</tr>';
       }
   
       $scrout.="</table>\n";
       $scrout.=<<ENDDOCUMENT;
   $advanced_buttons
   </form>
   </body>
   </html>
   ENDDOCUMENT
       $r->print($scrout);
       return;
 }  }
   
 # --------------------------------------------------------- Various form fields  ######################################################################
   ######################################################################
   
   =pod 
   
   =item &titlefield()
   
   Inputs: title text
   
   Outputs: titletext with font wrapper
   
   =cut
   
 sub simpletextfield {  ######################################################################
     my ($name,$value)=@_;  ######################################################################
     return '<input type=text name=\''.$name.  sub titlefield {
    '\' size=20 value=\''.$value.'\' />';      my $title=shift;
       return '<font face="arial" color="#800000">'.$title.'</font>';
 }  }
   
 sub simplecheckbox {  ######################################################################
     my ($name,$value)=@_;  ######################################################################
     my $checked='';  
     $checked="CHECKED" if $value eq 'on';  =pod 
     return '<input type=checkbox name=\''.$name.'\' '. $checked . '>';  
   =item viewoptiontext()
   
   Inputs: codename for view option
   
   Outputs: displayed text
   
   =cut
   
   ######################################################################
   ######################################################################
   sub viewoptiontext {
       my $code=shift;
       my %desc=&Apache::lonlocal::texthash
           ('detailed' => "Detailed Citation View",
            'xml' => 'XML/SGML',
            'compact' => 'Compact View',
            'fielded' => 'Fielded Format',
            'summary' => 'Summary View');
       return $desc{$code};
 }  }
   
 sub searchphrasefield {  ######################################################################
     my ($title,$name,$value)=@_;  ######################################################################
     my $instruction=<<END;  
 Enter terms or phrases separated by search operators such  =pod 
 as AND, OR, or NOT.  
 END  =item viewoptions()
     my $uctitle=uc($title);  
     return "\n<p><font color=\"#800000\" face=\"helvetica\"><b>$uctitle:</b>".  Inputs: none
    "</FONT> $instruction<br />".  
            '<input type=text name="'.$name.'" size=80 value=\''.$value.'\'>';  Outputs: text for box with view options
 }  
   =cut
 sub dateboxes {  
     my ($name,$defaultmonth,$defaultday,$defaultyear,  ######################################################################
  $currentmonth,$currentday,$currentyear)=@_;  ######################################################################
     ($defaultmonth,$defaultday,$defaultyear)=('','','');  sub viewoptions {
     my $month=<<END;      my $scrout="\n\n".'<table bgcolor="#FFFFBB">'.
 <select name="${name}_month">          '<tr><th>'.&mt('View Options').'</th><th>'.
 <option value='$defaultmonth'> </option>   &mt('Records per Page').'</th></tr><tr><td>';
 <option value="1">January</option>      unless ($ENV{'form.viewselect'}) { $ENV{'form.viewselect'}='detailed'; }
 <option value="2">February</option>      $scrout.=&Apache::lonmeta::selectbox('viewselect',
 <option value="3">March</option>   $ENV{'form.viewselect'},
 <option value="4">April</option>   \&viewoptiontext,
 <option value="5">May</option>   sort(keys(%Views)));
 <option value="6">June</option>      $scrout.='</td><td>';
 <option value="7">July</option>      $scrout.=&Apache::lonmeta::selectbox('show',
 <option value="8">August</option>   $ENV{'form.show'},
 <option value="9">September</option>   undef,
 <option value="10">October</option>   (10,20,50,100,1000,10000));
 <option value="11">November</option>      $scrout.="</td></tr></table>\n\n";
 <option value="12">December</option>      return $scrout;
 </select>  }
 END  
     $month=~s/(\"$currentmonth\")/$1 SELECTED/ if length($currentmonth);  ######################################################################
     my $day=<<END;  ######################################################################
 <select name="${name}_day">  
 <option value='$defaultday'> </option>  =pod 
 <option value="1">1</option>  
 <option value="2">2</option>  =item searchhelp()
 <option value="3">3</option>  
 <option value="4">4</option>  Inputs: none
 <option value="5">5</option>  
 <option value="6">6</option>  Outputs: return little blurb on how to enter searches
 <option value="7">7</option>  
 <option value="8">8</option>  =cut
 <option value="9">9</option>  
 <option value="10">10</option>  ######################################################################
 <option value="11">11</option>  ######################################################################
 <option value="12">12</option>  sub searchhelp {
 <option value="13">13</option>      return &mt('Enter terms or phrases separated by AND, OR, or NOT');
 <option value="14">14</option>  
 <option value="15">15</option>  
 <option value="16">16</option>  
 <option value="17">17</option>  
 <option value="18">18</option>  
 <option value="19">19</option>  
 <option value="20">20</option>  
 <option value="21">21</option>  
 <option value="22">22</option>  
 <option value="23">23</option>  
 <option value="24">24</option>  
 <option value="25">25</option>  
 <option value="26">26</option>  
 <option value="27">27</option>  
 <option value="28">28</option>  
 <option value="29">29</option>  
 <option value="30">30</option>  
 <option value="31">31</option>  
 </select>  
 END  
     $day=~s/(\"$currentday\")/$1 SELECTED/ if length($currentday);  
     my $year=<<END;  
 <select name="${name}_year">  
 <option value='$defaultyear'> </option>  
 <option value="1976">1976</option>  
 <option value="1977">1977</option>  
 <option value="1978">1978</option>  
 <option value="1979">1979</option>  
 <option value="1980">1980</option>  
 <option value="1981">1981</option>  
 <option value="1982">1982</option>  
 <option value="1983">1983</option>  
 <option value="1984">1984</option>  
 <option value="1985">1985</option>  
 <option value="1986">1986</option>  
 <option value="1987">1987</option>  
 <option value="1988">1988</option>  
 <option value="1989">1989</option>  
 <option value="1990">1990</option>  
 <option value="1991">1991</option>  
 <option value="1992">1992</option>  
 <option value="1993">1993</option>  
 <option value="1994">1994</option>  
 <option value="1995">1995</option>  
 <option value="1996">1996</option>  
 <option value="1997">1997</option>  
 <option value="1998">1998</option>  
 <option value="1999">1999</option>  
 <option value="2000">2000</option>  
 <option value="2001">2001</option>  
 <option value="2002">2002</option>  
 <option value="2003">2003</option>  
 <option value="2004">2004</option>  
 <option value="2005">2005</option>  
 <option value="2006">2006</option>  
 <option value="2007">2007</option>  
 <option value="2008">2008</option>  
 <option value="2009">2009</option>  
 <option value="2010">2010</option>  
 <option value="2011">2011</option>  
 <option value="2012">2012</option>  
 <option value="2013">2013</option>  
 <option value="2014">2014</option>  
 <option value="2015">2015</option>  
 <option value="2016">2016</option>  
 <option value="2017">2017</option>  
 <option value="2018">2018</option>  
 <option value="2019">2019</option>  
 <option value="2020">2020</option>  
 <option value="2021">2021</option>  
 <option value="2022">2022</option>  
 <option value="2023">2023</option>  
 <option value="2024">2024</option>  
 <option value="2025">2025</option>  
 <option value="2026">2026</option>  
 <option value="2027">2027</option>  
 <option value="2028">2028</option>  
 <option value="2029">2029</option>  
 <option value="2030">2030</option>  
 <option value="2031">2031</option>  
 <option value="2032">2032</option>  
 <option value="2033">2033</option>  
 <option value="2034">2034</option>  
 <option value="2035">2035</option>  
 <option value="2036">2036</option>  
 <option value="2037">2037</option>  
 <option value="2038">2038</option>  
 <option value="2039">2039</option>  
 <option value="2040">2040</option>  
 <option value="2041">2041</option>  
 <option value="2042">2042</option>  
 <option value="2043">2043</option>  
 <option value="2044">2044</option>  
 <option value="2045">2045</option>  
 <option value="2046">2046</option>  
 <option value="2047">2047</option>  
 <option value="2048">2048</option>  
 <option value="2049">2049</option>  
 <option value="2050">2050</option>  
 <option value="2051">2051</option>  
 </select>  
 END  
     $year=~s/(\"$currentyear\")/$1 SELECTED/ if length($currentyear);  
     return "$month$day$year";  
 }  }
   
 sub selectbox {  ######################################################################
     my ($title,$name,$value,$anyvalue,$anytag,$functionref,@idlist)=@_;  ######################################################################
     my $uctitle=uc($title);  
     my $selout="\n<p><font color=\"#800000\" face=\"helvetica\"><b>$uctitle:".  =pod 
  "</b></font><br />".'<select name="'.$name.'">';  
     foreach ($anyvalue,@idlist) {  =item &get_persistent_form_data()
         $selout.='<option value=\''.$_.'\'';  
         if ($_ eq $value and !/^any$/) {  Inputs: filename of database
     $selout.=' selected>'.&{$functionref}($_).'</option>';  
  }  Outputs: returns undef on database errors.
  elsif ($_ eq $value and /^$anyvalue$/) {  
     $selout.=' selected>'.$anytag.'</option>';  This function is the reverse of &make_persistent() for form data.
  }  Retrieve persistent data from %persistent_db.  Retrieved items will have their
         else {$selout.='>'.&{$functionref}($_).'</option>';}  values unescaped.  If a form value already exists in $ENV, it will not be
   overwritten.  Form values that are array references may have values appended
   to them.
   
   =cut
   
   ######################################################################
   ######################################################################
   sub get_persistent_form_data {
       my $filename = shift;
       return 0 if (! -e $filename);
       return undef if (! tie(%persistent_db,'GDBM_File',$filename,
                              &GDBM_READER(),0640));
       #
       # These make sure we do not get array references printed out as 'values'.
       my %arrays_allowed = ('form.domains'=>1);
       #
       # Loop through the keys, looking for 'form.'
       foreach my $name (keys(%persistent_db)) {
           next if ($name !~ /^form./);
           # Kludgification begins!
           if ($name eq 'form.domains' && 
               $ENV{'form.searchmode'} eq 'basic' &&
               $ENV{'form.phase'} ne 'disp_basic') {
               next;
           }
           # End kludge (hopefully)
           next if (exists($ENV{$name}));
           my @values = map { 
               &Apache::lonnet::unescape($_);
           } split(',',$persistent_db{$name});
           next if (@values <1);
           if ($arrays_allowed{$name}) {
               $ENV{$name} = [@values];
           } else {
               $ENV{$name} = $values[0] if ($values[0]);
           }
     }      }
     return $selout.'</select>';      untie (%persistent_db);
       return 1;
 }  }
   
 sub testf {  ######################################################################
     return @_[0];  ######################################################################
   
   =pod 
   
   =item &get_persistent_data()
   
   Inputs: filename of database, ref to array of values to recover.
   
   Outputs: array of values.  Returns undef on error.
   
   This function is the reverse of &make_persistent();
   Retrieve persistent data from %persistent_db.  Retrieved items will have their
   values unescaped.  If the item contains commas (before unescaping), the
   returned value will be an array pointer. 
   
   =cut
   
   ######################################################################
   ######################################################################
   sub get_persistent_data {
       my $filename = shift;
       my @Vars = @{shift()};
       my @Values;   # Return array
       return undef if (! -e $filename);
       return undef if (! tie(%persistent_db,'GDBM_File',$filename,
                              &GDBM_READER(),0640));
       foreach my $name (@Vars) {
           if (! exists($persistent_db{$name})) {
               push @Values, undef;
               next;
           }
           my @values = map { 
               &Apache::lonnet::unescape($_);
           } split(',',$persistent_db{$name});
           if (@values <= 1) {
               push @Values,$values[0];
           } else {
               push @Values,\@values;
           }
       }
       untie (%persistent_db);
       return @Values;
   }
   
   ######################################################################
   ######################################################################
   
   =pod 
   
   =item &make_persistent() 
   
   Inputs: Hash of values to save, filename of persistent database.
   
   Store variables away to the %persistent_db.
   Values will be escaped.  Values that are array pointers will have their
   elements escaped and concatenated in a comma seperated string.  
   
   =cut
   
   ######################################################################
   ######################################################################
   sub make_persistent {
       my %save = %{shift()};
       my $filename = shift;
       return undef if (! tie(%persistent_db,'GDBM_File',
                              $filename,&GDBM_WRCREAT(),0640));
       foreach my $name (keys(%save)) {
           my @values = (ref($save{$name}) ? @{$save{$name}} : ($save{$name}));
           # We handle array references, but not recursively.
           my $store = join(',', map { &Apache::lonnet::escape($_); } @values );
           $persistent_db{$name} = $store;
       }
       untie(%persistent_db);
       return 1;
   }
   
   ######################################################################
   ######################################################################
   
   =pod 
   
   =item &make_form_data_persistent() 
   
   Inputs: filename of persistent database.
   
   Store most form variables away to the %persistent_db.
   Values will be escaped.  Values that are array pointers will have their
   elements escaped and concatenated in a comma seperated string.  
   
   =cut
   
   ######################################################################
   ######################################################################
   sub make_form_data_persistent {
       my $r = shift;
       my $filename = shift;
       my %save;
       foreach (keys(%ENV)) {
           next if (!/^form/ || /submit/);
           $save{$_} = $ENV{$_};
       }
       return &make_persistent(\%save,$filename);
 }  }
   
 # ----------------------------------------------- Performing an advanced search  ######################################################################
 sub advancedsearch {  ######################################################################
     my ($r,$envhash)=@_;  
     my %ENV=%{$envhash};  =pod 
   
   =item &parse_advanced_search()
   
   Parse advanced search form and return the following:
   
   =over 4
   
   =item $query Scalar containing an SQL query.
   
   =item $customquery Scalar containing a custom query.
   
   =item $customshow Scalar containing commands to show custom metadata.
   
   =item $libraries_to_query Reference to array of domains to search.
   
   =back
   
   =cut
   
   ######################################################################
   ######################################################################
   sub parse_advanced_search {
       my ($r,$closebutton,$hidden_fields)=@_;
     my $fillflag=0;      my $fillflag=0;
       my $pretty_search_string = "<br />\n";
     # Clean up fields for safety      # Clean up fields for safety
     for my $field ('title','author','subject','keywords','url','version',      for my $field ('title','author','subject','keywords','url','version',
    'creationdatestart_month','creationdatestart_day',     'creationdatestart_month','creationdatestart_day',
Line 581  sub advancedsearch { Line 968  sub advancedsearch {
    'lastrevisiondatestart_month','lastrevisiondatestart_day',     'lastrevisiondatestart_month','lastrevisiondatestart_day',
    'lastrevisiondatestart_year','lastrevisiondateend_month',     'lastrevisiondatestart_year','lastrevisiondateend_month',
    'lastrevisiondateend_day','lastrevisiondateend_year',     'lastrevisiondateend_day','lastrevisiondateend_year',
    'notes','abstract','mime','language','owner',     'notes','abstract','extension','language','owner',
    'custommetadata','customshow') {     'custommetadata','customshow','category') {
  $ENV{"form.$field"}=~s/[^\w\/\s\(\)\=\-\"\']//g;   $ENV{"form.$field"}=~s/[^\w\/\s\(\)\=\-\"\']//g;
     }      }
       foreach ('mode','form','element') {
    # is this required?  Hmmm.
    next unless (exists($ENV{"form.$_"}));
    $ENV{"form.$_"}=&Apache::lonnet::unescape($ENV{"form.$_"});
    $ENV{"form.$_"}=~s/[^\w\/\s\(\)\=\-\"\']//g;
       }
       # Preprocess the category form element.
       $ENV{'form.category'} = 'any' if (! defined($ENV{'form.category'}) ||
                                         ref($ENV{'form.category'}));
       #
     # Check to see if enough information was filled in      # Check to see if enough information was filled in
     for my $field ('title','author','subject','keywords','url','version',      for my $field ('title','author','subject','keywords','url','version',
    'notes','abstract','mime','language','owner',     'notes','abstract','category','extension','language',
    'custommetadata') {                     'owner','custommetadata') {
  if (&filled($ENV{"form.$field"})) {   if (&filled($ENV{"form.$field"})) {
     $fillflag++;      $fillflag++;
  }   }
     }      }
     unless ($fillflag) {      unless ($fillflag) {
  &output_blank_field_error($r);   &output_blank_field_error($r,$closebutton,
  return OK;                                    'phase=disp_adv',$hidden_fields);
    return ;
     }      }
   
   
     # Turn the form input into a SQL-based query      # Turn the form input into a SQL-based query
     my $query='';      my $query='';
   
     my @queries;      my @queries;
       my $font = '<font color="#800000" face="helvetica">';
     # Evaluate logical expression AND/OR/NOT phrase fields.      # Evaluate logical expression AND/OR/NOT phrase fields.
     foreach my $field ('title','author','subject','notes','abstract','url',      foreach my $field ('title','author','subject','notes','abstract','url',
        'keywords','version','owner') {         'keywords','version','owner','standards') {
  if ($ENV{'form.'.$field}) {   if ($ENV{'form.'.$field}) {
     push @queries,&build_SQL_query($field,$ENV{'form.'.$field});              my $searchphrase = $ENV{'form.'.$field};
  }              $pretty_search_string .= $font."$field</font> contains <b>".
                   $searchphrase."</b>";
               if ($ENV{'form.'.$field.'_related'}) {
                   my @New_Words;
                   ($searchphrase,@New_Words) = &related_version($searchphrase);
                   if (@New_Words) {
                       $pretty_search_string .= " with related words: ".
                           "<b>@New_Words</b>.";
                   } else {
                       $pretty_search_string .= " with no related words.";
                   }
               }
               $pretty_search_string .= "<br />\n";
       push @queries,&build_SQL_query($field,$searchphrase);
           }
     }      }
       #
       # Make the 'mime' from 'form.category' and 'form.extension'
       #
       my $searchphrase;
       if (exists($ENV{'form.category'})    && 
           $ENV{'form.category'} !~ /^\s*$/ &&
           $ENV{'form.category'} ne 'any')     {
           my @extensions = &Apache::loncommon::filecategorytypes
                                                      ($ENV{'form.category'});
           if (scalar(@extensions) > 0) {
               $searchphrase = join(' OR ',@extensions);
           }
       }
       if (exists($ENV{'form.extension'}) && $ENV{'form.extension'} !~ /^\s*$/) {
           $searchphrase .= ' OR ' if (defined($searchphrase));
           my @extensions = split(/,/,$ENV{'form.extension'});
           $searchphrase .= join(' OR ',@extensions);
       }
       if (defined($searchphrase)) {
           push @queries,&build_SQL_query('mime',$searchphrase);
           $pretty_search_string .=$font.'mime</font> contains <b>'.
               $searchphrase.'</b><br />';
       }
       #
     # Evaluate option lists      # Evaluate option lists
     if ($ENV{'form.language'} and $ENV{'form.language'} ne 'any') {      if ($ENV{'form.language'} and $ENV{'form.language'} ne 'any') {
  push @queries,"(language like \"$ENV{'form.language'}\")";   push @queries,"(language like \"$ENV{'form.language'}\")";
     }          $pretty_search_string.=$font."language</font>= ".
     if ($ENV{'form.mime'} and $ENV{'form.mime'} ne 'any') {              &Apache::loncommon::languagedescription($ENV{'form.language'}).
  push @queries,"(mime like \"$ENV{'form.mime'}\")";                  "<br />\n";
     }      }
     if ($ENV{'form.copyright'} and $ENV{'form.copyright'} ne 'any') {      if ($ENV{'form.copyright'} and $ENV{'form.copyright'} ne 'any') {
  push @queries,"(copyright like \"$ENV{'form.copyright'}\")";   push @queries,"(copyright like \"$ENV{'form.copyright'}\")";
           $pretty_search_string.=$font."copyright</font> = ".
               &Apache::loncommon::copyrightdescription($ENV{'form.copyright'}).
                   "<br \>\n";
     }      }
       #
     # Evaluate date windows      # Evaluate date windows
     my $datequery=&build_date_queries(      my $datequery=&build_date_queries(
  $ENV{'form.creationdatestart_month'},   $ENV{'form.creationdatestart_month'},
Line 638  sub advancedsearch { Line 1075  sub advancedsearch {
  );   );
     # Test to see if date windows are legitimate      # Test to see if date windows are legitimate
     if ($datequery=~/^Incorrect/) {      if ($datequery=~/^Incorrect/) {
  &output_date_error($r,$datequery);   &output_date_error($r,$datequery,$closebutton,$hidden_fields);
  return OK;   return ;
     }      } elsif ($datequery) {
     elsif ($datequery) {          # Here is where you would set up pretty_search_string to output
           # date query information.
  push @queries,$datequery;   push @queries,$datequery;
     }      }
       #
     # Process form information for custom metadata querying      # Process form information for custom metadata querying
     my $customquery='';      my $customquery=undef;
     if ($ENV{'form.custommetadata'}) {      ##
  $customquery=&build_custommetadata_query('custommetadata',      ## The custom metadata search was removed q long time ago mostly 
       $ENV{'form.custommetadata'});      ## because I was unable to figureout exactly how it worked and could
     }      ## not imagine people actually using it.  MH
     my $customshow='';      ##
     if ($ENV{'form.customshow'}) {      # if ($ENV{'form.custommetadata'}) {
  $customshow=$ENV{'form.customshow'};      #    $pretty_search_string .=$font."Custom Metadata Search</font>: <b>".
  $customshow=~s/[^\w\s]//g;      #    $ENV{'form.custommetadata'}."</b><br />\n";
  my @fields=split(/\s+/,$customshow);      #    $customquery=&build_custommetadata_query('custommetadata',
  $customshow=join(" ",@fields);      #                                             $ENV{'form.custommetadata'});
     }      # }
     # Send query statements over the network to be processed by either the SQL      my $customshow=undef;
     # database or a recursive scheme of 'grep'-like actions (for custom      # if ($ENV{'form.customshow'}) {
     # metadata).      # $pretty_search_string .=$font."Custom Metadata Display</font>: <b>".
       #                         $ENV{'form.customshow'}."</b><br />\n";
       #    $customshow=$ENV{'form.customshow'};
       #    $customshow=~s/[^\w\s]//g;
       #    my @fields=split(/\s+/,$customshow);
       #    $customshow=join(" ",@fields);
       # }
       ##
       ## Deal with restrictions to given domains
       ## 
       my ($libraries_to_query,$pretty_domains_string) = 
           &parse_domain_restrictions();
       $pretty_search_string .= $pretty_domains_string."<br />\n";
       #
     if (@queries) {      if (@queries) {
  $query=join(" AND ",@queries);   $query=join(" AND ",@queries);
  $query="select * from metadata where $query";   $query="select * from metadata where $query";
  my $reply; # reply hash reference      } elsif ($customquery) {
  unless ($customquery or $customshow) {          $query = '';
     $reply=&Apache::lonnet::metadata_query($query);  
  }  
  else {  
     $reply=&Apache::lonnet::metadata_query($query,  
    $customquery,$customshow);  
  }  
  &output_results('Advanced',$r,$envhash,$customquery,$reply);  
     }      }
     elsif ($customquery) {      return ($query,$customquery,$customshow,$libraries_to_query,
  my $reply; # reply hash reference              $pretty_search_string);
  $reply=&Apache::lonnet::metadata_query('',  }
        $customquery,$customshow);  
  &output_results('Advanced',$r,$envhash,$customquery,$reply);  sub parse_domain_restrictions {
     }      my $libraries_to_query = undef;
     # should not get to this point      # $ENV{'form.domains'} can be either a scalar or an array reference.
     return 'Error.  Should not have gone to this point.';      # We need an array.
 }      if (! exists($ENV{'form.domains'})) {
           return (undef,'');
 # --------------------------------------------------- Performing a basic search      }
 sub basicsearch {      my @allowed_domains;
     my ($r,$envhash)=@_;      if (ref($ENV{'form.domains'})) {
     my %ENV=%{$envhash};          @allowed_domains =  @{$ENV{'form.domains'}};
       } else {
           @allowed_domains = ($ENV{'form.domains'});
       }
       #
       my %domain_hash = ();
       my $pretty_domains_string;
       foreach (@allowed_domains) {
           $domain_hash{$_}++;
       }
       if ($domain_hash{'any'}) {
           $pretty_domains_string = "In all LON-CAPA domains.";
       } else {
           if (@allowed_domains > 1) {
               $pretty_domains_string = "In LON-CAPA domains:";
           } else {
               $pretty_domains_string = "In LON-CAPA domain ";
           }
           foreach (sort @allowed_domains) {
               $pretty_domains_string .= "<b>".$_."</b> ";
           }
           foreach (keys(%Apache::lonnet::libserv)) {
               if (exists($domain_hash{$Apache::lonnet::hostdom{$_}})) {
                   push @$libraries_to_query,$_;
               }
           }
       }
       return ($libraries_to_query,$pretty_domains_string);
   }
   
   ######################################################################
   ######################################################################
   
   =pod 
   
   =item &parse_basic_search() 
   
   Parse the basic search form and return a scalar containing an sql query.
   
   =cut
   
   ######################################################################
   ######################################################################
   sub parse_basic_search {
       my ($r,$closebutton)=@_;
       #
     # Clean up fields for safety      # Clean up fields for safety
     for my $field ('basicexp') {      for my $field ('basicexp') {
  $ENV{"form.$field"}=~s/[^\w\s\(\)\-]//g;   $ENV{"form.$field"}=~s/[^\w\s\(\)\-]//g;
     }      }
       foreach ('mode','form','element') {
     # Check to see if enough is filled in   # is this required?  Hmmm.
    next unless (exists($ENV{"form.$_"}));
    $ENV{"form.$_"}=&Apache::lonnet::unescape($ENV{"form.$_"});
    $ENV{"form.$_"}=~s/[^\w\/\s\(\)\=\-\"\']//g;
       }
       my ($libraries_to_query,$pretty_domains_string) = 
           &parse_domain_restrictions();
       #
       # Check to see if enough of a query is filled in
     unless (&filled($ENV{'form.basicexp'})) {      unless (&filled($ENV{'form.basicexp'})) {
  &output_blank_field_error($r);   &output_blank_field_error($r,$closebutton,'phase=disp_basic');
  return OK;   return OK;
     }      }
       my $pretty_search_string = '<b>'.$ENV{'form.basicexp'}.'</b>';
       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: <b>@New_Words</b>.";
           } else {
               $pretty_search_string .= " with no related words.";
           }
       }
       #
     # Build SQL query string based on form page      # Build SQL query string based on form page
     my $query='';      my $query='';
     my $concatarg=join(',"    ",',      my $concatarg=join(',',
        ('title', 'author', 'subject', 'notes', 'abstract'));         ('title', 'author', 'subject', 'notes', 'abstract',
                           'keywords'));
     $concatarg='title' if $ENV{'form.titleonly'};      $concatarg='title' if $ENV{'form.titleonly'};
       $query=&build_SQL_query('concat_ws(" ",'.$concatarg.')',$search_string);
       if (defined($pretty_domains_string) && $pretty_domains_string ne '') {
           $pretty_search_string .= ' '.$pretty_domains_string;
       }
       $pretty_search_string .= "<br />\n";
       my $final_query = 'SELECT * FROM metadata WHERE '.$query;
       # &Apache::lonnet::logthis($final_query);
       return ($final_query,$pretty_search_string,
               $libraries_to_query);
   }
   
     $query=&build_SQL_query('concat('.$concatarg.')',$ENV{'form.'.'basicexp'});  ######################################################################
   ######################################################################
   
     # Get reply (either a hash reference to filehandles or bad connection)  =pod 
     my $reply=&Apache::lonnet::metadata_query('select * from metadata where '.$query);  
   
     # Output search results  =item &related_version()
   
     &output_results('Basic',$r,$envhash,$query,$reply);  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 ...)".  
   
     return OK;  Note: Using this twice on a string is probably silly.
 }  
   =cut
   
   ######################################################################
   ######################################################################
   sub related_version {
       my $search_string = shift;
       my $result = $search_string;
       my %New_Words = ();
       while ($search_string =~ /(\w+)/cg) {
           my $word = $1;
           next if (lc($word) =~ /\b(or|and|not)\b/);
           my @Words = &Apache::loncommon::get_related_words($word);
           @Words = ($#Words>4? @Words[0..4] : @Words);
           foreach (@Words) { $New_Words{$_}++;}
           my $replacement = join " OR ", ($word,@Words);
           $result =~ s/(\b)$word(\b)/$1($replacement)$2/g;
       }
       return $result,sort(keys(%New_Words));
   }
   
   ######################################################################
   ######################################################################
   
   =pod 
   
   =item &build_SQL_query() 
   
   Builds a SQL query string from a logical expression with AND/OR keywords
   using Text::Query and &recursive_SQL_query_builder()
   
   =cut
   
 # ------------------------------------------------------------- build_SQL_query  ######################################################################
   ######################################################################
 sub build_SQL_query {  sub build_SQL_query {
     my ($field_name,$logic_statement)=@_;      my ($field_name,$logic_statement)=@_;
     my $q=new Text::Query('abc',      my $q=new Text::Query('abc',
Line 729  sub build_SQL_query { Line 1282  sub build_SQL_query {
     return $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 {  sub build_custommetadata_query {
     my ($field_name,$logic_statement)=@_;      my ($field_name,$logic_statement)=@_;
     my $q=new Text::Query('abc',      my $q=new Text::Query('abc',
Line 739  sub build_custommetadata_query { Line 1305  sub build_custommetadata_query {
     my $matchexp=${$q}{'-parse'}{'-build'}{'matchstring'};      my $matchexp=${$q}{'-parse'}{'-build'}{'matchstring'};
     # quick fix to change literal into xml tag-matching      # quick fix to change literal into xml tag-matching
     # will eventually have to write a separate builder module      # will eventually have to write a separate builder module
     my $oldmatchexp=$matchexp;      # wordone=wordtwo becomes\<wordone\>[^\<] *wordtwo[^\<]*\<\/wordone\>
     $matchexp=~s/(\w+)\\\=([\w\\\+]+)/\\\<$1\\\>\[\^\\\<\]\*$2\[\^\\\<\]\*\\\<\\\/$1\\\>/g;      $matchexp =~ s/(\w+)\\=([\w\\\+]+)?# wordone=wordtwo is changed to 
                    /\\<$1\\>?#           \<wordone\>
                      \[\^\\<\]?#        [^\<]         
                      \*$2\[\^\\<\]?#           *wordtwo[^\<]
                      \*\\<\\\/$1\\>?#                        *\<\/wordone\>
                      /g;
     return $matchexp;      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 {  sub recursive_SQL_query_build {
     my ($dkey,$pattern)=@_;      my ($dkey,$pattern)=@_;
     my @matches=($pattern=~/(\[[^\]|\[]*\])/g);      my @matches=($pattern=~/(\[[^\]|\[]*\])/g);
     return $pattern unless @matches;      return $pattern unless @matches;
     foreach my $match (@matches) {      foreach my $match (@matches) {
  $match=~/\[ (\w+)\s(.*) \]/;          $match=~/\[ (\w+)\s(.*) \]/;
  my ($key,$value)=($1,$2);          my ($key,$value)=($1,$2);
  my $replacement='';          my $replacement='';
  if ($key eq 'literal') {          if ($key eq 'literal') {
     $replacement="($dkey like \"\%$value\%\")";              $replacement="($dkey LIKE \"\%$value\%\")";
  }          } elsif (lc($key) eq 'not') {
  elsif ($key eq 'not') {              $value=~s/LIKE/NOT LIKE/;
     $value=~s/like/not like/;  #          $replacement="($dkey not like $value)";
 #    $replacement="($dkey not like $value)";              $replacement="$value";
     $replacement="$value";          } elsif ($key eq 'and') {
  }              $value=~/(.*[\"|\)]) ([|\(|\^].*)/;
  elsif ($key eq 'and') {              $replacement="($1 AND $2)";
     $value=~/(.*[\"|\)]) ([|\(|\^].*)/;   } elsif ($key eq 'or') {
     $replacement="($1 AND $2)";              $value=~/(.*[\"|\)]) ([|\(|\^].*)/;
  }              $replacement="($1 OR $2)";
  elsif ($key eq 'or') {  
     $value=~/(.*[\"|\)]) ([|\(|\^].*)/;  
     $replacement="($1 OR $2)";  
  }   }
  substr($pattern,   substr($pattern,
        index($pattern,$match),                 index($pattern,$match),
        length($match),                 length($match),
        $replacement                 $replacement);
        );  
     }      }
     &recursive_SQL_query_build($dkey,$pattern);      &recursive_SQL_query_build($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 {  sub build_date_queries {
     my ($cmonth1,$cday1,$cyear1,$cmonth2,$cday2,$cyear2,      my ($cmonth1,$cday1,$cyear1,$cmonth2,$cday2,$cyear2,
  $lmonth1,$lday1,$lyear1,$lmonth2,$lday2,$lyear2)=@_;   $lmonth1,$lday1,$lyear1,$lmonth2,$lday2,$lyear2)=@_;
Line 827  sub build_date_queries { Line 1419  sub build_date_queries {
     return '';      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.)  
 sub output_results {  
     my $fnum; # search result counter  
     my ($mode,$r,$envhash,$query,$replyref)=@_;  
     my %ENV=%{$envhash};  
     my %rhash=%{$replyref};  
     my $compiledresult='';  
     my $timeremain=300;  
     my $elapsetime=0;  
     my $resultflag=0;  
     my $tflag=1;  
   
     # make query information persistent to allow for subsequent revision  =pod
     my $persistent=&make_persistent();  
   
     # output beginning of search page  =item &copyright_check()
  $r->print(<<BEGINNING);  
 <html>  
 <head>  
 <title>The LearningOnline Network with CAPA</title>  
 BEGINNING  
   
     # conditional output of script functions dependent on the mode in  Inputs: $Metadata, a hash pointer of metadata for a resource.
     # which the search was invoked  
         $r->print(<<SCRIPT) if $ENV{'form.catalogmode'} eq 'interactive';  Returns: 1 if the resource is available to the user making the query, 
 <script type="text/javascript">           0 otherwise.
     function select_data(title,url) {  
  changeTitle(title);  =cut
  changeURL(url);  
  self.close();  ######################################################################
     }  ######################################################################
     function changeTitle(val) {  sub copyright_check {
  if (opener.inf.document.forms.resinfo.elements.t) {      my $Metadata = shift;
     opener.inf.document.forms.resinfo.elements.t.value=val;      # Check copyright tags and skip results the user cannot use
  }      my (undef,undef,$resdom,$resname) = split('/',
     }                                                $Metadata->{'url'});
     function changeURL(val) {      # Check for priv
  if (opener.inf.document.forms.resinfo.elements.u) {      if (($Metadata->{'copyright'} eq 'priv') && 
     opener.inf.document.forms.resinfo.elements.u.value=val;          (($ENV{'user.name'} ne $resname) &&
  }           ($ENV{'user.domain'} ne $resdom))) {
     }          return 0;
 </script>  
 SCRIPT  
         $r->print(<<SCRIPT) if $ENV{'form.catalogmode'} eq 'groupsearch';  
 <script type="text/javascript">  
     function select_data(title,url) {  
 // alert('DEBUG: Should be storing '+title+' and '+url);  
     }  
     function queue(val) {  
  if (eval("document.forms.results.returnvalues["+val+"].checked")) {  
     document.forms.results.acts.value+='1a'+val+'b';  
  }  
  else {  
     document.forms.results.acts.value+='0a'+val+'b';  
  }  
     }  
     function select_group() {  
  window.location="/adm/groupsort?catalogmode=groupsearch&acts="+  
     document.forms.results.acts.value;  
     }      }
 </script>      # Check for domain
 SCRIPT      if (($Metadata->{'copyright'} eq 'domain') &&
         $r->print(<<SCRIPT);          ($ENV{'user.domain'} ne $resdom)) {
 <script type="text/javascript">          return 0;
     function displayinfo(val) {  
  popwin.document.forms.popremain.sdetails.value=val;  
     }      }
     function openhelp(val) {      return 1;
  openhelpwin=open('/adm/help/searchcat.html','helpscreen',  }
      'scrollbars=1,width=400,height=300');  
  openhelpwin.focus();  ######################################################################
   ######################################################################
   
   =pod
   
   =item &ensure_db_and_table()
   
   Ensure we can get lonmysql to connect to the database and the table we
   need exists.
   
   Inputs: $r, table id
   
   Returns: undef on error, 1 if the table exists.
   
   =cut
   
   ######################################################################
   ######################################################################
   sub ensure_db_and_table {
       my ($r,$table) = @_;
       ##
       ## Sanity check the table id.
       ##
       if (! defined($table) || $table eq '' || $table =~ /\D/ ) {
           $r->print("Unable to retrieve search results.  ".
                     "Unable to determine the table results were stored in.  ".
                     "</body></html>");
           return undef;
       }
       ##
       ## Make sure we can connect and the table exists.
       ##
       my $connection_result = &Apache::lonmysql::connect_to_db();
       if (!defined($connection_result)) {
           $r->print("Unable to connect to the MySQL database where your results".
                     " are stored. </body></html>");
           &Apache::lonnet::logthis("lonsearchcat: unable to get lonmysql to".
                                    " connect to database.");
           &Apache::lonnet::logthis(&Apache::lonmysql::get_error());
           return undef;
       }
       my $table_check = &Apache::lonmysql::check_table($table);
       if (! defined($table_check)) {
           $r->print("A MySQL error has occurred.</form></body></html>");
           &Apache::lonnet::logthis("lonmysql was unable to determine the status".
                                    " of table ".$table);
           return undef;
       } elsif (! $table_check) {
           $r->print("The table of results could not be found.");
           &Apache::lonnet::logthis("The user requested a table, ".$table.
                                    ", that could not be found.");
           return undef;
       }
       return 1;
   }
   
   ######################################################################
   ######################################################################
   
   =pod
   
   =item &print_sort_form()
   
   The sort feature is not implemented at this time.  This form just prints 
   a link to change the search query.
   
   =cut
   
   ######################################################################
   ######################################################################
   sub print_sort_form {
       my ($r,$pretty_query_string) = @_;
       my $bodytag=&Apache::loncommon::bodytag(undef,undef,undef,1);
       ##
       my %SortableFields=&Apache::lonlocal::texthash( 
            id        => 'Default',
            title     => 'Title',
            author    => 'Author',
            subject   => 'Subject',
            url       => 'URL',
            version   => 'Version Number',
            mime      => 'Mime type',
            lang      => 'Language',
            owner     => 'Owner/Publisher',
            copyright => 'Copyright',
            hostname  => 'Host',
            creationdate     => 'Creation Date',
            lastrevisiondate => 'Revision Date'
        );
       ##
       my $table = $ENV{'form.table'};
       return if (! &ensure_db_and_table($r,$table));
       ##
       ## Get the number of results 
       ##
       my $total_results = &Apache::lonmysql::number_of_rows($table);
       if (! defined($total_results)) {
           $r->print("A MySQL error has occurred.</form></body></html>");
           &Apache::lonnet::logthis("lonmysql was unable to determine the number".
                                    " of rows in table ".$table);
           &Apache::lonnet::logthis(&Apache::lonmysql::get_error());
           return;
     }      }
     function abortsearch(val) {      my $result;
  openhelpwin=open('/adm/help/searchcat.html','helpscreen',      $result.=<<END;
      'scrollbars=1,width=400,height=300');  <html>
  openhelpwin.focus();  <head>
   <script>
       function change_sort() {
           var newloc = "/adm/searchcat?phase=results";
           newloc += "&persistent_db_id=$ENV{'form.persistent_db_id'}";
           newloc += "&sortby=";
           newloc += document.forms.statusform.elements.sortby.value;
           parent.resultsframe.location= newloc;
     }      }
 </script>  </script>
 SCRIPT  <title>Results</title>
     $r->rflush();  
   
     # begin showing the cataloged results  
     $r->print(<<CATALOGBEGIN);  
 </head>  </head>
 <body bgcolor="#ffffff">  $bodytag
 <img align=right src=/adm/lonIcons/lonlogos.gif>  <form name="statusform" action="" method="post">
 <h1>Search Catalog</h1>  <input type="hidden" name="Queue" value="" />
 CATALOGBEGIN  END
         $r->print(<<CATALOGCONTROLS);  
 <form name='results' method="post" action="/adm/searchcat">  #<h2>Sort Results</h2>
 <input type='hidden' name='acts' value='' />  #Sort by: <select size="1" name="sortby" onchange="javascript:change_sort();">
 <input type='button' value='Revise search request'  #    $ENV{'form.sortby'} = 'id' if (! defined($ENV{'form.sortby'}));
 onClick='this.form.submit();' />  #    foreach (keys(%SortableFields)) {
 $importbutton  #        $result.="<option name=\"$_\"";
 $closebutton  #        if ($_ eq $ENV{'form.sortby'}) {
 $persistent  #            $result.=" selected ";
 <hr />  #        }
 <h3>Search Query</h3>  #        $result.=" >$SortableFields{$_}</option>\n";
 CATALOGCONTROLS  #    }
     if ($mode eq 'Basic') {  #    $result.="</select>\n";
  $r->print(<<RESULTS);      my $revise = &revise_button();
 <p>      $result.=<<END;
 <b>Basic search:</b> $ENV{'form.basicexp'}  
 </p>  
 RESULTS  
     }  
     elsif ($mode eq 'Advanced') {  
  $r->print(<<RESULTS);  
 <p>  <p>
 <b>Advanced search</b>  There are $total_results matches to your query. $revise
 $query  </p><p>
   Search:$pretty_query_string
 </p>  </p>
 RESULTS  </form>
     }  </body>
     $r->print('<h3>Search Results</h3>');  </html>
     $r->rflush();  END
     my $servernum=(keys %rhash)+0;      $r->print($result);
       return;
   }
   
     # define server grid (shows status of multiple machines)  #####################################################################
     my $hcinit;  #####################################################################
     my $grid="'<br />'+";  
     $grid.="\n";  
     my $sn=1;  
     for my $sk (sort keys %rhash) {  
  # '<a href="  
  $grid.="'<a href=\"";  
  # javascript:displayinfo('+  
  $grid.="javascript:opener.displayinfo('+";  
  # "'"+'key  
  $grid.="\"'\"+'";  
  $grid.=$sk;  
  my $hc;  
  if ($rhash{$sk} eq 'con_lost') {  
     $hc="BAD CONNECTION, CONTACT SYSTEM ADMINISTRATOR ";  
  }  
  else {  
     $hc="'+\"'\"+\"+hc['$sk']+\"+\"'\"+'";  
     $hcinit.="hc[\"$sk\"]=\"not yet connected...\";";  
  }  
  $grid.=" hitcount=".$hc;  
  $grid.=" domain=".$hostdomains{$sk};  
  $grid.=" IP=".$hostips{$sk};  
  # '+"'"+'">'+  
  $grid.="'+\"'\"+')\">'+";  
  $grid.="\n";  
  $grid.="'<img border=\"0\" name=\"img".$sn."\"".  
     " src=\"/adm/lonIcons/srvnull.gif\" alt=\"".$sk."\" /></a>'+\n";  
  $grid.="'<br />'+\n" unless $sn%10;  
         $sn++;  
     }  
     $r->print(<<ENDPOP);  
 <script type="text/javascript">  
     popwin=open('','popwin','scrollbars=1,width=400,height=220');  
     popwin.focus();  
     popwin.document.writeln('<'+'html>');  
     popwin.document.writeln('<'+'head>');  
     popwin.document.writeln('<'+'script>');  
     popwin.document.writeln('hc=new Array();$hcinit');  
     popwin.document.writeln('<'+'/script>');  
     popwin.document.writeln('<'+'/head>'+  
         '<'+'body bgcolor="#FFFFFF">'+  
  '<'+'image name="whirly" align="right" src="/adm/lonIcons/'+  
  'lonanim.gif" '+  
  'alt="animated logo" />'+  
  '<'+'h3>Search Results Progress<'+'/h3>'+  
         '<'+'form name="popremain">'+  
         '<'+'tt>'+  
  '<'+'br clear="all"/><i>PLEASE BE PATIENT</i>'+  
  '<'+'br />SCANNING $servernum SERVERS'+  
  '<'+'br clear="all" />Number of record hits found '+  
  '<'+'input type="text" size="10" name="numhits"'+  
  ' value="0" />'+  
  '<'+'br clear="all" />Time elapsed '+  
  '<'+'input type="text" size="10" name="elapsetime"'+  
  ' value="0" />'+  
  '<'+'br />'+  
  'SERVER GRID (click on any cell for details)'+  
         $grid  
         '<'+'br />'+  
  'Server details '+  
  '<'+'input type="text" size="35" name="sdetails"'+  
  ' value="" />'+  
  '<'+'br />'+  
  ' <'+'input type="button" name="button"'+  
  ' value="abort search and view current results" '+  
  ' onClick="javascript:opener.abortsearch()" />'+  
  ' <'+'input type="button" name="button"'+  
  ' value="help" onClick="javascript:opener.openhelp()" />'+  
  '<'+'/tt>'+  
         '<'+'/form>'+  
         '<'+'/body><'+'/html>');  
     popwin.document.close();  
 </script>  
 ENDPOP  
     $r->rflush();  
   
     my $servercount=0;  =pod
     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='';  
   
  if ($reply eq 'con_lost') {  
     $r->print('<script type="text/javascript">popwin.document.img'.  
       $sn.'.'.  
       'src="/adm/lonIcons/srvbad.gif";</script>'.  
       "\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) {  
       $r->print('<script type="text/javascript">'.  
  'popwin.document.img'.$sn.'.'.  
  'src="/adm/lonIcons/srvhalf.gif";</script>'.  
  "\n");  
       $r->rflush();  
       $r->print('<script type="text/javascript">'.  
  'popwin.hc["'.$rkey.'"]='.  
  '"still transferring..."'.';</script>'.  
  "\n");  
       $r->rflush();  
       $tflag=0;  
   }  
   if (-e "$replyfile.end") {  
       $bloop--;  
       $orkey{$rkey}=1;  
       if (-s $replyfile) {  
   $r->print('<script type="text/javascript">'.  
     'popwin.document.img'.$sn.'.'.  
     'src="/adm/lonIcons/srvgood.gif";'.  
     '</script>'."\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;  
   $r->print('<script type="text/javascript">'.  
     'popwin.hc["'.$rkey.'"]='.  
     $hitcount{$rkey}.';</script>'.  
     "\n");  
   $r->rflush();  
   $hitcountsum+=$hitcount{$rkey};  
   $r->print('<script type="text/javascript">'.  
     'popwin.document.forms.popremain.'.  
     'numhits.value='.$hitcountsum.  
     ';</script>'.  
     "\n");  
   $r->rflush();  
       }  
       else {  
   $r->print('<script type="text/javascript">'.  
     'popwin.document.img'.$sn.'.'.  
     'src="/adm/lonIcons/srvempty.gif";'.  
     '</script>'.  
     "\n");  
   $r->rflush();  
   $r->print('<script type="text/javascript">'.  
     'popwin.hc["'.$rkey.'"]=0'.  
     ';</script>'.  
     "\n");  
   $r->rflush();  
       }  
       last WLOOP;  
   }  
   if ($temp>1) {  
       sleep 1;  
       $timeremain--;  
       $elapsetime++;  
       last WLOOP;  
   }  
   last WLOOP unless $timeremain;  
   sleep 1;  
   $timeremain--;  
   $elapsetime++;  
   $r->print('<script type="text/javascript">'.  
     'popwin.document.popremain.elapsetime.'.  
     'value="'.$elapsetime.'";</script>'."\n");  
   $r->rflush();  
   $temp++;  
       }  
     }  
     $r->print('<script type="text/javascript">'.  
       'popwin.document.whirly.'.  
       'src="'.'/adm/lonIcons/lonanimend.gif'.  
       '";</script>'."\n");  
     $r->rflush();  
  }  
  my $customshow='';  
  my $extrashow='';  
  my @customfields;  
  if ($ENV{'form.customshow'}) {  
     $customshow=$ENV{'form.customshow'};  
     $customshow=~s/[^\w\s]//g;  
     my @fields=map {"<font color=\"#008000\">$_:</font><!-- $_ -->"}   
     split(/\s+/,$customshow);  
     @customfields=split(/\s+/,$customshow);  
     if ($customshow) {  
  $extrashow="<ul><li>".join("</li><li>",@fields)."</li></ul>\n";  
     }  
  }  
  my $customdata='';  
  my %customhash;  
  foreach my $result (@results) {  
     if ($result=~/^(custom\=.*)$/) { # grab all custom metadata  
  my $tmp=$result;  
  $tmp=~s/^custom\=//;  
  my ($k,$v)=map {&Apache::lonnet::unescape($_);  
     } split(/\,/,$tmp);  
  $customhash{$k}=$v;  
     }  
  }  
  if (keys %hash) {  
     untie %hash;  
  }  
  if (tie(%hash,'GDBM_File',$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='<i>- not displayed -</i>';  
     $fields[4]=$keywords;  
     $notes='<i>- not displayed -</i>';  
     $fields[6]=$notes;  
     $abstract='<i>- not displayed -</i>';  
     $fields[7]=$abstract;  
     $subject='<i>- not displayed -</i>';  
     $fields[2]=$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;  
   
  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 if $compiledresult or $servercount!=$servernum;  
 <hr align='left' width='200' noshade />  
 END  
                 $compiledresult.=<<END;  
 <p>  
 END  
                if ($ENV{'form.catalogmode'} eq 'interactive') {  
    my $titleesc=$title;  
    $titleesc=~s/\'/\\'/; # '  
   
                    $compiledresult.=<<END if ($ENV{'form.catalogmode'} eq 'interactive');  =item MySQL Table Description
 <font size='-1'><INPUT TYPE="button" NAME="returnvalues" VALUE="SELECT"  
 onClick="javascript:select_data('$titleesc','$url')">  MySQL table creation requires a precise description of the data to be
 </font>  stored.  The use of the correct types to hold data is vital to efficient
 <br />  storage and quick retrieval of records.  The columns must be described in
 END  the following format:
                 }  
                 if ($ENV{'form.catalogmode'} eq 'groupsearch') {  =cut
     $fnum+=0;  
     $hash{"pre_${fnum}_link"}=$url;  #####################################################################
     $hash{"pre_${fnum}_title"}=$title;  #####################################################################
     $compiledresult.=<<END;  #
 <font size='-1'><input type="checkbox" name="returnvalues" value="SELECT"  # These should probably be scoped but I don't have time right now...
 onClick="javascript:queue($fnum)" />  #
 </font>  my @Datatypes;
 <br />  my @Fullindicies;
 END  
 # <input type="hidden" name="title$fnum" value="$title" />  
 # <input type="hidden" name="url$fnum" value="$url" />  
                     $fnum++;  
  }  
         my $httphost=$ENV{'HTTP_HOST'};  
   
         my $viewselect;  
         if ($mode eq 'Basic') {  
     $viewselect=$ENV{'form.basicviewselect'};  
  }  
         elsif ($mode eq 'Advanced') {  
     $viewselect=$ENV{'form.advancedviewselect'};  
  }  
   
         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);  
  }  
           
             }  ######################################################################
   ######################################################################
   
             untie %hash;  =pod
         }  
         else {  
     $r->print('<html><head></head><body>Unable to tie hash to db '.  
   'file</body></html>');  
  }  
  if ($compiledresult) {  
     $resultflag=1;  
  }  
   
  $r->print(<<RESULTS);  =item &create_results_table()
 $compiledresult  
 RESULTS  
         my $percent=sprintf('%3.0f',($servercount/$servernum*100));  
     }  
   }  
     unless ($resultflag) {  
         $r->print("\nThere were no results that matched your query\n");  
     }  
 #    $r->print('<script type="text/javascript">'.'popwin.close()</script>'."\n"); $r->rflush();   
     $r->print(<<RESULTS);  
 </body>  
 </html>  
 RESULTS  
 }  
   
 # ------------------------------------------------------ Detailed Citation View  Creates the table of search results by calling lonmysql.  Stores the
 sub detailed_citation_view {  table id in $ENV{'form.table'}
     my ($title,$author,$subject,$url,$keywords,$version,  
  $notes,$shortabstract,$mime,$lang,  Inputs: none.
  $creationdate,$lastrevisiondate,$owner,$copyright,  
  $hostname,$httphost,$extrashow)=@_;  Returns: the identifier of the table on success, undef on error.
     my $result=<<END;  
 <i>$owner</i>, last revised $lastrevisiondate  =cut
 <h3><A HREF="http://$httphost$url" TARGET='search_preview'>$title</A></h3>  
 <h3>$author</h3>  ######################################################################
 </p>  ######################################################################
 <p>  sub set_up_table_structure {
 <b>Subject:</b> $subject<br />      my ($datatypes,$fullindicies) = 
 <b>Keyword(s):</b> $keywords<br />          &LONCAPA::lonmetadata::describe_metadata_storage();
 <b>Notes:</b> $notes<br />      unshift(@$datatypes,{name => 'id', 
 <b>MIME Type:</b>          type => 'MEDIUMINT',
 END          restrictions => 'UNSIGNED NOT NULL',
     $result.=&Apache::loncommon::filedescription($mime);          primary_key  => 'yes',
     $result.=<<END;          auto_inc     => 'yes' });
 <br />      @Datatypes = @{$datatypes};
 <b>Language:</b>       @Fullindicies = @{$fullindicies};
 END      return;
     $result.=&Apache::loncommon::languagedescription($lang);  }
     $result.=<<END;  
 <br />  sub create_results_table {
 <b>Copyright/Distribution:</b>       &set_up_table_structure();
 END      my $table = &Apache::lonmysql::create_table
     $result.=&Apache::loncommon::copyrightdescription($copyright);          ( { columns => \@Datatypes,
     $result.=<<END;              FULLTEXT => [{'columns' => \@Fullindicies},],
 <br />          } );
 </p>      if (defined($table)) {
 $extrashow          $ENV{'form.table'} = $table;
 <p>          return $table;
 $shortabstract      } 
 </p>      return undef; # Error...
 END  }
     return $result;  
   ######################################################################
   ######################################################################
   
   =pod
   
   =item Search Status update functions
   
   Each of the following functions changes the values of one of the
   input fields used to display the search status to the user.  The names
   should be explanatory.
   
   Inputs: Apache request handler ($r), text to display.
   
   Returns: Nothing.
   
   =over 4
   
   =item &update_count_status()
   
   =item &update_status()
   
   =item &update_seconds()
   
   =back
   
   =cut
   
   ######################################################################
   ######################################################################
   sub update_count_status {
       my ($r,$text) = @_;
       $text =~ s/\'/\\\'/g;
       $r->print
           ("<script>document.statusform.count.value = ' $text'</script>\n");
       $r->rflush();
 }  }
   
 # ---------------------------------------------------------------- Summary View  sub update_status {
 sub summary_view {      my ($r,$text) = @_;
     my ($title,$author,$subject,$url,$keywords,$version,      $text =~ s/\'/\\\'/g;
  $notes,$shortabstract,$mime,$lang,      $r->print
  $creationdate,$lastrevisiondate,$owner,$copyright,          ("<script>document.statusform.status.value = ' $text'</script>\n");
  $hostname,$httphost,$extrashow)=@_;      $r->rflush();
     my $cprtag=&Apache::loncommon::copyrightdescription($copyright);  
     my $result=<<END;  
 <a href="http://$httphost$url" TARGET='search_preview'>$author</a><br />  
 $title<br />  
 $owner -- $lastrevisiondate<br />  
 $cprtag<br />  
 $extrashow  
 </p>  
 END  
     return $result;  
 }  }
   
 # -------------------------------------------------------------- Fielded Format  sub update_seconds {
 sub fielded_format_view {      my ($r,$text) = @_;
     my ($title,$author,$subject,$url,$keywords,$version,      $text =~ s/\'/\\\'/g;
  $notes,$shortabstract,$mime,$lang,      $r->print
  $creationdate,$lastrevisiondate,$owner,$copyright,          ("<script>document.statusform.seconds.value = ' $text'</script>\n");
  $hostname,$httphost,$extrashow)=@_;      $r->rflush();
     my $mimetag=&Apache::loncommon::filedescription($mime);  
     my $language=&Apache::loncommon::languagedescription($lang);  
     my $cprtag=&Apache::loncommon::copyrightdescription($copyright);  
     my $result=<<END;  
 <b>URL: </b> <A HREF="http://$httphost$url" TARGET='search_preview'>$url</A>  
 <br />  
 <b>Title:</b> $title<br />  
 <b>Author(s):</b> $author<br />  
 <b>Subject:</b> $subject<br />  
 <b>Keyword(s):</b> $keywords<br />  
 <b>Notes:</b> $notes<br />  
 <b>MIME Type:</b> $mimetag<br />  
 <b>Language:</b> $language<br />  
 <b>Creation Date:</b> $creationdate<br />  
 <b>Last Revision Date:</b> $lastrevisiondate<br />  
 <b>Publisher/Owner:</b> $owner<br />  
 <b>Copyright/Distribution:</b> $cprtag<br />  
 <b>Repository Location:</b> $hostname<br />  
 <b>Abstract:</b> $shortabstract<br />  
 $extrashow  
 </p>  
 END  
     return $result;  
 }  }
   
 # -------------------------------------------------------------------- XML/SGML  ######################################################################
 sub xml_sgml_view {  ######################################################################
     my ($title,$author,$subject,$url,$keywords,$version,  
  $notes,$shortabstract,$mime,$lang,  =pod
  $creationdate,$lastrevisiondate,$owner,$copyright,  
  $hostname,$httphost,$extrashow)=@_;  =item &revise_button()
     my $cprtag=&Apache::loncommon::copyrightdescription($copyright);  
     my $mimetag=&Apache::loncommon::filedescription($mime);  Inputs: None
     my $language=&Apache::loncommon::languagedescription($lang);  
     my $result=<<END;  Returns: html string for a 'revise search' button.
 <pre>  
 &lt;LonCapaResource&gt;  =cut
 &lt;url&gt;$url&lt;/url&gt;  
 &lt;title&gt;$title&lt;/title&gt;  ######################################################################
 &lt;author&gt;$author&lt;/author&gt;  ######################################################################
 &lt;subject&gt;$subject&lt;/subject&gt;  sub revise_button {
 &lt;keywords&gt;$keywords&lt;/keywords&gt;      my $revise_phase = 'disp_basic';
 &lt;notes&gt;$notes&lt;/notes&gt;      $revise_phase = 'disp_adv' if ($ENV{'form.searchmode'} eq 'advanced');
 &lt;mimeInfo&gt;      my $newloc = '/adm/searchcat'.
 &lt;mime&gt;$mime&lt;/mime&gt;          '?persistent_db_id='.$ENV{'form.persistent_db_id'}.
 &lt;mimetag&gt;$mimetag&lt;/mimetag&gt;              '&cleargroupsort=1'.
 &lt;/mimeInfo&gt;              '&phase='.$revise_phase;
 &lt;languageInfo&gt;      my $result = qq{<input type="button" value="Revise search" name="revise"} .
 &lt;language&gt;$lang&lt;/language&gt;          qq{ onClick="parent.location='$newloc';" /> };
 &lt;languagetag&gt;$language&lt;/languagetag&gt;  
 &lt;/languageInfo&gt;  
 &lt;creationdate&gt;$creationdate&lt;/creationdate&gt;  
 &lt;lastrevisiondate&gt;$lastrevisiondate&lt;/lastrevisiondate&gt;  
 &lt;owner&gt;$owner&lt;/owner&gt;  
 &lt;copyrightInfo&gt;  
 &lt;copyright&gt;$copyright&lt;/copyright&gt;  
 &lt;copyrighttag&gt;$cprtag&lt;/copyrighttag&gt;  
 &lt;/copyrightInfo&gt;  
 &lt;repositoryLocation&gt;$hostname&lt;/repositoryLocation&gt;  
 &lt;shortabstract&gt;$shortabstract&lt;/shortabstract&gt;  
 &lt;/LonCapaResource&gt;  
 </pre>  
 $extrashow  
 END  
     return $result;      return $result;
 }  }
   
 # ---------------------------------------------------- see if a field is filled  ######################################################################
 sub filled {  ######################################################################
     my ($field)=@_;  
     if ($field=~/\S/ && $field ne 'any') {  =pod
  return 1;  
   =item &run_search()
   
   Executes a search query by sending it the the other servers and putting the
   results into MySQL.
   
   =cut
   
   ######################################################################
   ######################################################################
   sub run_search {
       my ($r,$query,$customquery,$customshow,$serverlist,$pretty_string) = @_;
       my $bodytag=&Apache::loncommon::bodytag(undef,undef,undef,1);
       my $connection = $r->connection;
       #
       # Timing variables
       #
       my $starttime = time;
       my $max_time  = 30;  # seconds for the search to complete
       #
       # Print run_search header
       #
       $r->print(<<END);
   <html>
   <head><title>Search Status</title></head>
   $bodytag
   <form name="statusform" action="" method="post">
   <input type="hidden" name="Queue" value="" />
   END
       # Check to see if $pretty_string has more than one carriage return.
       # Assume \n s are following <br /> s and truncate the value.
       # (there is probably a better way)...
       my @Lines = split /<br \/>/,$pretty_string;
       if (@Lines > 2) {
           $pretty_string = join '<br \>',(@Lines[0..2],'....<br />');
       }
       $r->print(&mt("Search").": ".$pretty_string);
       $r->rflush();
       #
       # Determine the servers we need to contact.
       my @Servers_to_contact;
       if (defined($serverlist)) {
           if (ref($serverlist) eq 'ARRAY') {
               @Servers_to_contact = @$serverlist;
           } else {
               @Servers_to_contact = ($serverlist);
           }
       } else {
           @Servers_to_contact = sort(keys(%Apache::lonnet::libserv));
     }      }
     else {      my %Server_status;
  return 0;      my $table =$ENV{'form.table'};
       if (! defined($table) || $table eq '' || $table =~ /\D/ ) {
           $r->print("Unable to determine table id to store search results in.".
                     "The search has been aborted.</body></html>");
           return;
       }
       my $table_status = &Apache::lonmysql::check_table($table);
       if (! defined($table_status)) {
           $r->print("Unable to determine status of table.</body></html>");
           &Apache::lonnet::logthis("Bogus table id of $table for ".
                                    "$ENV{'user.name'} @ $ENV{'user.domain'}");
           &Apache::lonnet::logthis("lonmysql error = ".
                                    &Apache::lonmysql::get_error());
           return;
       }
       if (! $table_status) {
           &Apache::lonnet::logthis("lonmysql error = ".
                                    &Apache::lonmysql::get_error());
           &Apache::lonnet::logthis("lonmysql debug = ".
                                    &Apache::lonmysql::get_debug());
           &Apache::lonnet::logthis('table status = "'.$table_status.'"');
           $r->print("The table id,$table, we tried to use is invalid.".
                     "The search has been aborted.</body></html>");
           return;
       }
       ##
       ## Prepare for the big loop.
       my $hitcountsum;
       my $server; 
       my $status;
       my $revise = &revise_button();
       $r->print(<<END);
   <table>
   <tr><th>Status</th><th>Total Matches</th><th>Time Remaining</th><th></th></tr>
   <tr>
   <td><input type="text" name="status"  value="" size="30" /></td>
   <td><input type="text" name="count"   value="" size="10" /></td>
   <td><input type="text" name="seconds" value="" size="8" /></td>
   <td>$revise</td>
   </tr>
   </table>
   </form>
   END
       $r->rflush();
       my $time_remaining = $max_time - (time - $starttime) ;
       my $last_time = $time_remaining;
       &update_seconds($r,$time_remaining);
       &update_status($r,'contacting '.$Servers_to_contact[0]);
       while (($time_remaining > 0) &&
              ((@Servers_to_contact) || keys(%Server_status))) {
           # Send out a search request if it needs to be done.
           if (@Servers_to_contact) {
               # Contact one server
               my $server = shift(@Servers_to_contact);
               &update_status($r,&mt('contacting').' '.$server);
               my $reply=&Apache::lonnet::metadata_query($query,$customquery,
                                                         $customshow,[$server]);
               ($server) = keys(%$reply);
               $Server_status{$server} = $reply->{$server};
           } else {
               # wait a sec. to give time for files to be written
               # This sleep statement is here instead of outside the else 
               # block because we do not want to pause if we have servers
               # left to contact.  
               if (scalar (keys(%Server_status))) {
                   &update_status($r,
                          &mt('waiting on').' '.(join(' ',keys(%Server_status))));
               }
               sleep(1); 
           }
           #
           # Loop through the servers we have contacted but do not
           # have results from yet, looking for results.
           while (my ($server,$status) = each(%Server_status)) {
               last if ($connection->aborted());
               if ($status eq 'con_lost') {
                   delete ($Server_status{$server});
                   next;
               }
               $status=~/^([\.\w]+)$/; 
              my $datafile=$r->dir_config('lonDaemons').'/tmp/'.$1;
               if (-e $datafile && ! -e "$datafile.end") {
                   &update_status($r,&mt('Receiving results from').' '.$server);
                   next;
               }
               last if ($connection->aborted());
               if (-e "$datafile.end") {
                   &update_status($r,&mt('Reading results from').' '.$server);
                   if (-z "$datafile") {
                       delete($Server_status{$server});
                       next;
                   }
                   my $fh;
                   if (!($fh=Apache::File->new($datafile))) { 
                       $r->print("Unable to open search results file for ".
                                     "server $server.  Omitting from search");
                       delete($Server_status{$server}); 
                      next;
                   }
                   # Read in the whole file.
                   while (my $result = <$fh>) {
                       last if ($connection->aborted());
                       # handle custom fields?  Someday we will!
                       chomp($result);
                       next unless $result;
                       # Parse the result.
                       my %Fields = &parse_raw_result($result,$server);
                       $Fields{'hostname'} = $server;
                       next if (! &copyright_check(\%Fields));
                       # Store the result in the mysql database
                       my $result = &Apache::lonmysql::store_row($table,\%Fields);
                       if (! defined($result)) {
                           $r->print(&Apache::lonmysql::get_error());
                       }
                       # $r->print(&Apache::lonmysql::get_debug());
                       $hitcountsum ++;
                       $time_remaining = $max_time - (time - $starttime) ;
                       if ($last_time - $time_remaining > 0) {
                           &update_seconds($r,$time_remaining);
                           $last_time = $time_remaining;
                       }
                       if ($hitcountsum % 50 == 0) {
                           &update_count_status($r,$hitcountsum);
                       }
                   } # End of foreach (@results)
                   $fh->close();
                   # $server is only deleted if the results file has been 
                   # found and (successfully) opened.  This may be a bad idea.
                   delete($Server_status{$server});
               }
               last if ($connection->aborted());
               &update_count_status($r,$hitcountsum);
           }
           last if ($connection->aborted());
           # Finished looping through the servers
           $starttime = time if (@Servers_to_contact);
           $time_remaining = $max_time - (time - $starttime) ;
           if ($last_time - $time_remaining > 0) {
               $last_time = $time_remaining;
               &update_seconds($r,$time_remaining);
           }
     }      }
       &update_status($r,&mt('Search Complete').$server);
       &update_seconds($r,0);
       #
       &Apache::lonmysql::disconnect_from_db();
       #
       # We have run out of time or run out of servers to talk to and
       # results to get.  
       $r->print("</body></html>");
       if ($ENV{'form.catalogmode'} ne 'groupsearch') {
           $r->print("<script>".
                         "window.location='/adm/searchcat?".
                         "phase=sort&".
                         "persistent_db_id=$ENV{'form.persistent_db_id'}';".
                     "</script>");
       }
       return;
 }  }
   
 # ---------------- Message to output when there are not enough fields filled in  ######################################################################
 sub output_blank_field_error {  ######################################################################
     my ($r)=@_;  
     # make query information persistent to allow for subsequent revision  
     my $persistent=&make_persistent();  
   
     $r->print(<<BEGINNING);  =pod
 <html>  
 <head>  =item &prev_next_buttons()
 <title>The LearningOnline Network with CAPA</title>  
 BEGINNING  Returns html for the previous and next buttons on the search results page.
     $r->print(<<RESULTS);  
 </head>  =cut
 <body bgcolor="#ffffff">  
 <img align='right' src='/adm/lonIcons/lonlogos.gif' />  ######################################################################
 <h1>Search Catalog</h1>  ######################################################################
 <form method="post" action="/adm/searchcat">  sub prev_next_buttons {
 $persistent      my ($current_min,$show,$total,$parms) = @_;
 <input type='button' value='Revise search request'      return '' if ($show eq 'all'); # No links if you get them all at once.
 onClick='this.form.submit();' />      my $links;
 $closebutton      ##
 <hr />      ## Prev
 <h3>Helpful Message</h3>      my $prev_min = $current_min - $show;
 <p>      $prev_min = 1 if $prev_min < 1;
 Incorrect search query due to blank entry fields.      if ($prev_min < $current_min) {
 You need to fill in the relevant          $links .= 
 fields on the search page in order for a query to be              qq{<a href="/adm/searchcat?$parms&start=$prev_min&show=$show">}.
 processed.              &mt('prev').'</a>';
 </p>      } else {
 </body>          $links .= &mt('prev');
 </html>      }
 RESULTS      ##
       ## Pages.... Someday.
       ##
       $links .= 
           qq{&nbsp;
              <a href="/adm/searchcat?$parms&start=$current_min&$show=$show">}.
                   &mt('reload').'</a>';
       ##
       ## Next
       my $next_min = $current_min + $show;
       $next_min = $current_min if ($next_min > $total);
       if ($next_min != $current_min) {
           $links .= 
               qq{&nbsp;
                  <a href="/adm/searchcat?$parms&start=$next_min&show=$show">}.
                       &mt('next').'</a>';
       } else {
           $links .= '&nbsp;'.&mt('next');
       }
       return $links;
 }  }
   
 # ----------------------------------------------------------- Output date error  ######################################################################
 sub output_date_error {  ######################################################################
     my ($r,$message)=@_;  
     # make query information persistent to allow for subsequent revision  
     my $persistent=&make_persistent();  
   
     $r->print(<<BEGINNING);  =pod
 <html>  
 <head>  =item &display_results()
 <title>The LearningOnline Network with CAPA</title>  
 BEGINNING  Prints the results out for selection and perusal.
     $r->print(<<RESULTS);  
 </head>  =cut
 <body bgcolor="#ffffff">  
 <img align='right' src='/adm/lonIcons/lonlogos.gif' />  ######################################################################
 <h1>Search Catalog</h1>  ######################################################################
 <form method="post" action="/adm/searchcat">  sub display_results {
 $persistent      my ($r,$importbutton,$closebutton,$diropendb) = @_;
 <input type='button' value='Revise search request'      my $connection = $r->connection;
 onClick='this.form.submit();' />      $r->print(&search_results_header($importbutton,$closebutton));
 $closebutton      ##
 <hr />      ## Set viewing function
 <h3>Helpful Message</h3>      ##
 <p>      my $viewfunction = $Views{$ENV{'form.viewselect'}};
 $message      if (!defined($viewfunction)) {
 </p>          $r->print("Internal Error - Bad view selected.\n");
 </body>          $r->rflush();
 </html>          return;
 RESULTS      }
       ##
       ## $checkbox_num is a count of the number of checkboxes output on the 
       ## page this is used only during catalogmode=groupsearch.
       my $checkbox_num = 0;
       ##
       ## Get the catalog controls setup
       ##
       my $action = "/adm/searchcat?phase=results";
       ##
       ## Deal with groupsearch by opening the groupsearch db file.
       if ($ENV{'form.catalogmode'} eq 'groupsearch') {
           if (! tie(%groupsearch_db,'GDBM_File',$diropendb,
                     &GDBM_WRCREAT(),0640)) {
               $r->print('Unable to store import results.</form></body></html>');
               $r->rflush();
               return;
           } 
       }
       ##
       ## Prepare the table for querying
       my $table = $ENV{'form.table'};
       return if (! &ensure_db_and_table($r,$table));
       ##
       ## Get the number of results 
       my $total_results = &Apache::lonmysql::number_of_rows($table);
       if (! defined($total_results)) {
           $r->print("A MySQL error has occurred.</form></body></html>");
           &Apache::lonnet::logthis("lonmysql was unable to determine the number".
                                    " of rows in table ".$table);
           &Apache::lonnet::logthis(&Apache::lonmysql::get_error());
           return;
       }
       ##
       ## Determine how many results we need to get
       $ENV{'form.start'} = 1      if (! exists($ENV{'form.start'}));
       $ENV{'form.show'}  = 'all'  if (! exists($ENV{'form.show'}));
       my $min = $ENV{'form.start'};
       my $max;
       if ($ENV{'form.show'} eq 'all') {
           $max = $total_results ;
       } else {
           $max = $min + $ENV{'form.show'} - 1;
           $max = $total_results if ($max > $total_results);
       }
       ##
       ## Output links (if necessary) for 'prev' and 'next' pages.
       $r->print
           ('<center>'.
            &prev_next_buttons($min,$ENV{'form.show'},$total_results,
                               "table=".$ENV{'form.table'}.
                               "&phase=results".
                               "&persistent_db_id=".$ENV{'form.persistent_db_id'})
            ."</center>\n"
            );
       if ($total_results == 0) {
           $r->print('<meta HTTP-EQUIV="Refresh" CONTENT="1">'.
                     '<h3>'.&mt('There are currently no results').'.</h3>'.
                     "</form></body></html>");
           return;
       } else {
           $r->print
               ("<center>Results $min to $max out of $total_results</center>\n");
       }
       ##
       ## Get results from MySQL table
       my @Results = &Apache::lonmysql::get_rows($table,
                                                 'id>='.$min.' AND id<='.$max);
       ##
       ## Loop through the results and output them.
       foreach my $row (@Results) {
           if ($connection->aborted()) {
               &cleanup();
               return;
           }
           my %Fields = %{&parse_row(@$row)};
           my $output="<p>\n";
           my $prefix=&catalogmode_output($Fields{'title'},$Fields{'url'},
                                          $Fields{'id'},$checkbox_num++);
           # Render the result into html
           $output.= &$viewfunction($prefix,%Fields);
           # Print them out as they come in.
           $r->print($output);
           $r->rflush();
       }
       if (@Results < 1) {
           $r->print(&mt("There were no results matching your query"));
       } else {
           $r->print
               ('<center>'.
                &prev_next_buttons($min,$ENV{'form.show'},$total_results,
                                   "table=".$ENV{'form.table'}.
                                   "&phase=results".
                                   "&persistent_db_id=".
                                   $ENV{'form.persistent_db_id'})
                ."</center>\n"
                );
       }
       $r->print("</form></body></html>");
       $r->rflush();
       untie %groupsearch_db if (tied(%groupsearch_db));
       return;
 }  }
   
 # --------- settings whenever the user causes the search window to be launched  ######################################################################
 sub start_fresh_session {  ######################################################################
     delete $hash{'mode_catalog'};  
     foreach (keys %hash) {  =pod
         if ($_ =~ /^pre_/) {  
             delete $hash{$_};  =item &catalogmode_output($title,$url,$fnum,$checkbox_num)
   
   Returns html needed for the various catalog modes.  Gets inputs from
   $ENV{'form.catalogmode'}.  Stores data in %groupsearch_db.
   
   =cut
   
   ######################################################################
   ######################################################################
   sub catalogmode_output {
       my $output = '';
       my ($title,$url,$fnum,$checkbox_num) = @_;
       if ($ENV{'form.catalogmode'} eq 'interactive') {
           $title=~ s/\'/\\\'/g;
           if ($ENV{'form.catalogmode'} eq 'interactive') {
               $output.=<<END 
   <font size='-1'><INPUT TYPE="button" NAME="returnvalues" VALUE="SELECT"
   onClick="javascript:select_data('$title','$url')">
   </font>
   END
         }          }
         if ($_ =~ /^store/) {      } elsif ($ENV{'form.catalogmode'} eq 'groupsearch') {
     delete $hash{$_};          $groupsearch_db{"pre_${fnum}_link"}=$url;
  }          $groupsearch_db{"pre_${fnum}_title"}=$title;
           $output.=<<END;
   <font size='-1'>
   <input type="checkbox" name="returnvalues" value="SELECT"
   onClick="javascript:queue($checkbox_num,$fnum)" />
   </font>
   END
     }      }
       return $output;
 }  }
   ######################################################################
   ######################################################################
   
 1;  =pod
   
 __END__  =item &parse_row()
   
 =head1 NAME  Parse a row returned from the database.
   
 Apache::lonsearchcat - mod_perl module for handling a searchable catalog  =cut
   
 =head1 SYNOPSIS  ######################################################################
   ######################################################################
   sub parse_row {
       my @Row = @_;
       my %Fields;
       if (! scalar(@Datatypes)) {
           &set_up_table_structure();
       }
       for (my $i=0;$i<=$#Row;$i++) {
           $Fields{$Datatypes[$i]->{'name'}}=&Apache::lonnet::unescape($Row[$i]);
       }
       $Fields{'language'} = 
           &Apache::loncommon::languagedescription($Fields{'language'});
       $Fields{'copyrighttag'} =
           &Apache::loncommon::copyrightdescription($Fields{'copyright'});
       $Fields{'mimetag'} =
           &Apache::loncommon::filedescription($Fields{'mime'});
       return \%Fields;
   }
   
 Invoked by /etc/httpd/conf/srm.conf:  ###########################################################
   ###########################################################
   
  <Location /adm/searchcat>  =pod
  PerlAccessHandler       Apache::lonacc  
  SetHandler perl-script  
  PerlHandler Apache::lonsearchcat  
  ErrorDocument     403 /adm/login  
  ErrorDocument  500 /adm/errorhandler  
  </Location>  
   
 =head1 INTRODUCTION  =item &parse_raw_result()
   
 This module enables searching for a distributed browseable catalog.  Takes a line from the file of results and parse it.  Returns a hash 
   with keys according to column labels
   
 This is part of the LearningOnline Network with CAPA project  In addition, the following tags are set by calling the appropriate 
 described at http://www.lon-capa.org.  lonnet function: 'language', 'copyrighttag', 'mimetag'.
   
 =head1 BEGIN SUBROUTINE  The 'title' field is set to "Untitled" if the title field is blank.
   
 This routine is only run once after compilation.  'abstract' and 'keywords' are truncated to 200 characters.
   
 =over 4  =cut
   
 =item *  ###########################################################
   ###########################################################
   sub parse_raw_result {
       my ($result,$hostname) = @_;
       # conclude from self to others regarding fields
       my %Fields=&Apache::lonmeta::metadata_col_to_hash(
    map {
    &Apache::lonnet::unescape($_);
    } (split(/\,/,$result))
         );
       return %Fields;
   }
   
 Initializes %hostdomains and hostips hash table (for hosts.tab).  ###########################################################
   ###########################################################
   
 =back  =pod
   
   =item &handle_custom_fields()
   
   =cut
   
 =head1 HANDLER SUBROUTINE  ###########################################################
   ###########################################################
   sub handle_custom_fields {
       my @results = @{shift()};
       my $customshow='';
       my $extrashow='';
       my @customfields;
       if ($ENV{'form.customshow'}) {
           $customshow=$ENV{'form.customshow'};
           $customshow=~s/[^\w\s]//g;
           my @fields=map {
               "<font color=\"#008000\">$_:</font><!-- $_ -->";
           } split(/\s+/,$customshow);
           @customfields=split(/\s+/,$customshow);
           if ($customshow) {
               $extrashow="<ul><li>".join("</li><li>",@fields)."</li></ul>\n";
           }
       }
       my $customdata='';
       my %customhash;
       foreach my $result (@results) {
           if ($result=~/^(custom\=.*)$/) { # grab all custom metadata
               my $tmp=$result;
               $tmp=~s/^custom\=//;
               my ($k,$v)=map {&Apache::lonnet::unescape($_);
                           } split(/\,/,$tmp);
               $customhash{$k}=$v;
           }
       }
       return ($extrashow,\@customfields,\%customhash);
   }
   
 This routine is called by Apache and mod_perl.  ######################################################################
   ######################################################################
   
   =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  =over 4
   
 =item *  =item $mode is either (at this writing) 'Basic' or 'Advanced'
   
 configure dynamic components of interface  =back
   
 =item *  The following environment variables are checked:
   
 determine current user  =over 4
   
 =item *  =item 'form.catalogmode' 
   
 see if a search invocation should be done  Checked for 'interactive' and 'groupsearch'.
   
 =item *  =item 'form.mode'
   
 else, begin building search interface to output  Checked for existance & 'edit' mode.
   
 =item *  =item 'form.form'
   
 compute date selection boxes  Contains the name of the form that has the input fields to set
   
 =item *  =item 'form.element'
   
 compute customized metadata field  the name of the input field to put the URL into
   
 =item *  =item 'form.titleelement'
   
 print screen  the name of the input field to put the title into
   
 =back  =back
   
 =head1 OTHER SUBROUTINES  =cut
   
 =over 4  ######################################################################
   ######################################################################
   sub search_results_header {
       my ($importbutton,$closebutton) = @_;
       my $bodytag=&Apache::loncommon::bodytag(undef,undef,undef,1);
       my $result = '';
       # output beginning of search page
       # conditional output of script functions dependent on the mode in
       # which the search was invoked
       if ($ENV{'form.catalogmode'} eq 'interactive'){
    if (! exists($ENV{'form.mode'}) || $ENV{'form.mode'} ne 'edit') {
               $result.=<<SCRIPT;
   <script type="text/javascript">
       function select_data(title,url) {
    changeTitle(title);
    changeURL(url);
    parent.close();
       }
       function changeTitle(val) {
    if (parent.opener.inf.document.forms.resinfo.elements.t) {
       parent.opener.inf.document.forms.resinfo.elements.t.value=val;
    }
       }
       function changeURL(val) {
    if (parent.opener.inf.document.forms.resinfo.elements.u) {
       parent.opener.inf.document.forms.resinfo.elements.u.value=val;
    }
       }
   </script>
   SCRIPT
           } elsif ($ENV{'form.mode'} eq 'edit') {
               my $form = $ENV{'form.form'};
               my $element = $ENV{'form.element'};
               my $titleelement = $ENV{'form.titleelement'};
       my $changetitle;
       if (!$titleelement) {
    $changetitle='function changeTitle(val) {}';
       } else {
       $changetitle=<<END;
   function changeTitle(val) {
       if (parent.targetwin.document) {
           parent.targetwin.document.forms["$form"].elements["$titleelement"].value=val;
       } else {
    var url = 'forms[\"$form\"].elements[\"$titleelement\"].value';
           alert("Unable to transfer data to "+url);
       }
   }
   END
               }
   
               $result.=<<SCRIPT;
   <script type="text/javascript">
   function select_data(title,url) {
       changeURL(url);
       changeTitle(title);
       parent.close();
   }
   $changetitle
   function changeURL(val) {
       if (parent.targetwin.document) {
           parent.targetwin.document.forms["$form"].elements["$element"].value=val;
       } else {
    var url = 'forms[\"$form\"].elements[\"$element\"].value';
           alert("Unable to transfer data to "+url);
       }
   }
   </script>
   SCRIPT
           }
       }
       $result.=<<SCRIPT if $ENV{'form.catalogmode'} eq 'groupsearch';
   <script type="text/javascript">
       function queue(checkbox_num,val) {
           if (document.forms.results.returnvalues.length != "undefined" &&
               typeof(document.forms.results.returnvalues.length) == "number") {
               if (document.forms.results.returnvalues[checkbox_num].checked) {
                   parent.statusframe.document.forms.statusform.elements.Queue.value +='1a'+val+'b';
               } else {
                   parent.statusframe.document.forms.statusform.elements.Queue.value +='0a'+val+'b';
               }
           } else {
               if (document.forms.results.returnvalues.checked) {
                   parent.statusframe.document.forms.statusform.elements.Queue.value +='1a'+val+'b';
               } else {
                   parent.statusframe.document.forms.statusform.elements.Queue.value +='0a'+val+'b';
               }
           }
       }
       function select_group() {
    parent.window.location=
       "/adm/groupsort?mode=$ENV{'form.mode'}&catalogmode=groupsearch&acts="+
       parent.statusframe.document.forms.statusform.elements.Queue.value;
       }
   </script>
   SCRIPT
       $result.=<<END;
   </head>
   $bodytag
   <form name="results" method="post" action="" >
   <input type="hidden" name="Queue" value="" />
   $importbutton
   END
       return $result;
   }
   
   ######################################################################
   ######################################################################
   sub search_status_header {
       my $bodytag=&Apache::loncommon::bodytag(undef,undef,undef,1);
       return <<ENDSTATUS;
   <html><head><title>Search Status</title></head>
   $bodytag
   <h3>Search Status</h3>
   Sending search request to LON-CAPA servers.<br />
   ENDSTATUS
   }
   
   sub results_link {
       my $basic_link   = "/adm/searchcat?"."&table=".$ENV{'form.table'}.
           "&persistent_db_id=".$ENV{'form.persistent_db_id'};
       my $results_link = $basic_link."&phase=results".
           "&pause=1"."&start=1";
       return $results_link;
   }
   
   ######################################################################
   ######################################################################
   sub print_frames_interface {
       my $r = shift;
       my $basic_link = "/adm/searchcat?"."&table=".$ENV{'form.table'}.
           "&persistent_db_id=".$ENV{'form.persistent_db_id'};
       my $run_search_link = $basic_link."&phase=run_search";
       my $results_link = &results_link();
       my $result = <<"ENDFRAMES";
   <html>
   <head>
   <script>
   var targetwin = opener;
   var queue = '';
   </script>
   <title>LON-CAPA Digital Library Search Results</title>
   </head>
   <frameset rows="150,*">
       <frame name="statusframe"  src="$run_search_link">
       <frame name="resultsframe" src="$results_link">
   </frameset>
   </html>
   ENDFRAMES
   
 =item *      $r->print($result);
       return;
   }
   
 get_unprocessed_cgi() : reads in critical name/value pairs that may have not  ######################################################################
 been processed and passed into %ENV by the web server  ######################################################################
   
 =item *  =pod 
   
 make_persistent() : makes a set of hidden HTML fields to make  =item Metadata Viewing Functions
 SQL search interface information to be persistent  
   
 =back  Output is a HTML-ified string.
   
 WEB INTERFACE COMPONENT FUNCTIONS  Input arguments are title, author, subject, url, keywords, version,
   notes, short abstract, mime, language, creation date,
   last revision date, owner, copyright, hostname, and
   extra custom metadata to show.
   
 =over 4  =over 4
   
 =item *  =item &detailed_citation_view() 
   
 simpletextfield(name,value) : returns HTML formatted string for simple text  =cut
 field  
   
 =item *  ######################################################################
   ######################################################################
   sub detailed_citation_view {
       my ($prefix,%values) = @_;
       my $icon=&Apache::loncommon::icon($values{'url'});
       my $result=<<END;
   <b>$prefix<img src="$icon" /><a href="http://$ENV{'HTTP_HOST'}$values{'url'}" 
       target='search_preview'>$values{'title'}</a></b>
   <p>
   <b>$values{'author'}</b>, <i>$values{'owner'}</i><br />
   
 simplecheckbox(name,value) : returns HTML formatted string for simple  <b>Subject:       </b> $values{'subject'}<br />
 checkbox  <b>Keyword(s):    </b> $values{'keywords'}<br />
   <b>Notes:         </b> $values{'notes'}<br />
   <b>MIME Type:     </b> $values{'mimetag'}<br />
   <b>Language:      </b> $values{'language'}<br />
   <b>Copyright/Distribution:</b> $values{'copyrighttag'}<br />
   </p>
   $values{'extrashow'}
   <p>
   $values{'shortabstract'}
   </p>
   <hr align='left' width='200' noshade />
   END
       return $result;
   }
   
 =item *  ######################################################################
   ######################################################################
   
 searchphrasefield(title,name,value) : returns HTML formatted string for  =pod 
 a search expression phrase field  
   
 =item *  =item &summary_view() 
   
 dateboxes(name, defaultmonth, defaultday, defaultyear) : returns HTML  =cut
 formatted string for a calendar date  ######################################################################
   ######################################################################
   sub summary_view {
       my ($prefix,%values) = @_;
       my $icon=&Apache::loncommon::icon($values{'url'});
       my $result=<<END;
   $prefix<img src="$icon" /><a href="http://$ENV{'HTTP_HOST'}$values{'url'}" 
      target='search_preview'>$values{'author'}</a><br />
   $values{'title'}<br />
   $values{'owner'} -- $values{'lastrevisiondate'}<br />
   $values{'copyrighttag'}<br />
   $values{'extrashow'}
   </p>
   <hr align='left' width='200' noshade />
   END
       return $result;
   }
   
 =item *  ######################################################################
   ######################################################################
   
 selectbox(title,name,value,%HASH=options) : returns HTML formatted string for  =pod 
 a selection box field  
   
 =back  =item &compact_view() 
   
 SEARCH FUNCTIONS  =cut
   
 =over 4  ######################################################################
   ######################################################################
   sub compact_view {
       my ($prefix,%values) = @_;
       my $icon=&Apache::loncommon::icon($values{'url'});
       my $result=<<END;
   $prefix <img src="$icon" /> <a href="http://$ENV{'HTTP_HOST'}$values{'url'}"  target='search_preview'>
   $values{'title'}</a>
   <b>$values{'author'}</b><br />
   END
       return $result;
   }
   
 =item *  
   
 advancedsearch(server reference, environment reference) : perform a complex  ######################################################################
 multi-field logical query  ######################################################################
   
 =item *  =pod 
   
 basicsearch(server reference, environment reference) : perform a simple  =item &fielded_format_view() 
 single-field logical query  
   
 =item *  =cut
   
 build_SQL_query(field name, logic) : builds a SQL query string from a  ######################################################################
 logical expression with AND/OR keywords  ######################################################################
   sub fielded_format_view {
       my ($prefix,%values) = @_;
       my $icon=&Apache::loncommon::icon($values{'url'});
       my $result=<<END;
   $prefix <img src="$icon" />
   <b>URL: </b> <a href="http://$ENV{'HTTP_HOST'}$values{'url'}" 
                 target='search_preview'>$values{'url'}</a>
   <br />
   <b>Title:</b> $values{'title'}<br />
   <b>Author(s):</b> $values{'author'}<br />
   <b>Subject:</b> $values{'subject'}<br />
   <b>Keyword(s):</b> $values{'keywords'}<br />
   <b>Notes:</b> $values{'notes'}<br />
   <b>MIME Type:</b> $values{'mimetag'}<br />
   <b>Language:</b> $values{'language'}<br />
   <b>Creation Date:</b> $values{'creationdate'}<br />
   <b>Last Revision Date:</b> $values{'lastrevisiondate'}<br />
   <b>Publisher/Owner:</b> $values{'owner'}<br />
   <b>Copyright/Distribution:</b> $values{'copyrighttag'}<br />
   <b>Repository Location:</b> $values{'hostname'}<br />
   <b>Abstract:</b> $values{'shortabstract'}<br />
   $values{'extrashow'}
   </p>
   <hr align='left' width='200' noshade />
   END
       return $result;
   }
   
 =item *  ######################################################################
   ######################################################################
   
 build_custommetadata_query(field_name, logic_statement) : builds a perl  =pod 
 regular expression from a logical expression with AND/OR keywords  
   
 =item *  =item &xml_sgml_view() 
   
 recursive_SQL_query_build(field name, reverse notation expression) :   =back 
 builds a SQL query string from a reverse notation expression  
 logical expression with AND/OR keywords  
   
 =item *  =cut
   
 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.  sub xml_sgml_view {
       my ($prefix,%values) = @_;
       my $result=<<END;
   $prefix
   <pre>
   &lt;LonCapaResource&gt;
   &lt;url&gt;$values{'url'}&lt;/url&gt;
   &lt;title&gt;$values{'title'}&lt;/title&gt;
   &lt;author&gt;$values{'author'}&lt;/author&gt;
   &lt;subject&gt;$values{'subject'}&lt;/subject&gt;
   &lt;keywords&gt;$values{'keywords'}&lt;/keywords&gt;
   &lt;notes&gt;$values{'notes'}&lt;/notes&gt;
   &lt;mimeInfo&gt;
   &lt;mime&gt;$values{'mime'}&lt;/mime&gt;
   &lt;mimetag&gt;$values{'mimetag'}&lt;/mimetag&gt;
   &lt;/mimeInfo&gt;
   &lt;languageInfo&gt;
   &lt;language&gt;$values{'language'}&lt;/language&gt;
   &lt;languagetag&gt;$values{'languagetag'}&lt;/languagetag&gt;
   &lt;/languageInfo&gt;
   &lt;creationdate&gt;$values{'creationdate'}&lt;/creationdate&gt;
   &lt;lastrevisiondate&gt;$values{'lastrevisiondate'}&lt;/lastrevisiondate&gt;
   &lt;owner&gt;$values{'owner'}&lt;/owner&gt;
   &lt;copyrightInfo&gt;
   &lt;copyright&gt;$values{'copyright'}&lt;/copyright&gt;
   &lt;copyrighttag&gt;$values{'copyrighttag'}&lt;/copyrighttag&gt;
   &lt;/copyrightInfo&gt;
   &lt;repositoryLocation&gt;$values{'hostname'}&lt;/repositoryLocation&gt;
   &lt;shortabstract&gt;$values{'shortabstract'}&lt;/shortabstract&gt;
   &lt;/LonCapaResource&gt;
   </pre>
   $values{'extrashow'}
   <hr align='left' width='200' noshade />
   END
       return $result;
   }
   
 =back  ######################################################################
   ######################################################################
   
 OUTPUTTING RESULTS FUNCTION  =pod 
   
 =over 4  =item &filled() see if field is filled.
   
 =item *  =cut
   
 output_results(output mode, server reference, environment reference,  ######################################################################
 reply list reference) : outputs results from search  ######################################################################
   sub filled {
       my ($field)=@_;
       if ($field=~/\S/ && $field ne 'any') {
           return 1;
       } else {
           return 0;
       }
   }
   
 =back  ######################################################################
   ######################################################################
   
 DIFFERENT WAYS TO VIEW METADATA RECORDS  =pod 
   
 =over 4  =item &output_blank_field_error()
   
 =item *  Output a complete page that indicates the user has not filled in enough
   information to do a search.
   
 detailed_citation_view(ORDERED METADATA LIST FOR A RESULT OBJECT INSTANCE) :  Inputs: $r (Apache request handle), $closebutton, $parms.
 see metadata viewing notes below   
   
 =item *  Returns: nothing
   
 summary_view(ORDERED METADATA LIST FOR A RESULT OBJECT INSTANCE) :  $parms is extra information to include in the 'Revise search request' link.
 see metadata viewing notes below   
   
 =item *  =cut
   
 fielded_format_view(ORDERED METADATA LIST FOR A RESULT OBJECT INSTANCE) :  ######################################################################
 see metadata viewing notes below   ######################################################################
   sub output_blank_field_error {
       my ($r,$closebutton,$parms,$hidden_fields)=@_;
       my $bodytag=&Apache::loncommon::bodytag(undef,undef,undef,1);
       # make query information persistent to allow for subsequent revision
       $r->print(<<BEGINNING);
   <html>
   <head>
   <title>The LearningOnline Network with CAPA</title>
   BEGINNING
       $r->print(<<RESULTS);
   </head>
   $bodytag
   <img align='right' src='/adm/lonIcons/lonlogos.gif' />
   <h1>Search Catalog</h1>
   <form method="post" action="/adm/searchcat">
   $hidden_fields
   <a href="/adm/searchcat?$parms&persistent_db_id=$ENV{'form.persistent_db_id'}"
   >Revise search request</a>&nbsp;
   $closebutton
   <hr />
   <h3>Unactionable search query.</h3>
   <p>
   You did not fill in enough information for the search to be started.
   You need to fill in relevant fields on the search page in order 
   for a query to be processed.
   </p>
   </body>
   </html>
   RESULTS
   }
   
 =item *  ######################################################################
   ######################################################################
   
 xml_sgml_view(ORDERED METADATA LIST FOR A RESULT OBJECT INSTANCE) :  =pod 
 see metadata viewing notes below   
   
 =back  =item &output_date_error()
   
   _____________________________________________________________________  Output a full html page with an error message.
  | * 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  Inputs: 
   
 =over 4      $r, the request pointer.
       $message, the error message for the user.
       $closebutton, the specialized close button needed for groupsearch.
   
 =item *  =cut
   
 filled(field) : determines whether a given field has been filled  ######################################################################
   ######################################################################
   sub output_date_error {
       my ($r,$message,$closebutton,$hidden_fields)=@_;
       # make query information persistent to allow for subsequent revision
       my $bodytag=&Apache::loncommon::bodytag(undef,undef,undef,1);
       $r->print(<<RESULTS);
   <html>
   <head>
   <title>The LearningOnline Network with CAPA</title>
   </head>
   $bodytag
   <img align='right' src='/adm/lonIcons/lonlogos.gif' />
   <h1>Search Catalog</h1>
   <form method="post" action="/adm/searchcat">
   $hidden_fields
   <input type='button' value='Revise search request'
   onClick='this.form.submit();' />
   $closebutton
   <hr />
   <h3>Error</h3>
   <p>
   $message
   </p>
   </body>
   </html>
   RESULTS
   }
   
 =back  ######################################################################
   ######################################################################
   
 ERROR FUNCTIONS  =pod 
   
 =over 4  =item &start_fresh_session()
   
 =item *  Cleans the global %groupsearch_db by removing all fields which begin with
   'pre_' or 'store'.
   
 output_blank_field_error(server reference) : outputs a message saying that  =cut
 more fields need to be filled in  
   
 =item *  ######################################################################
   ######################################################################
   sub start_fresh_session {
       delete $groupsearch_db{'mode_catalog'};
       foreach (keys %groupsearch_db) {
           if ($_ =~ /^pre_/) {
               delete $groupsearch_db{$_};
           }
           if ($_ =~ /^store/) {
       delete $groupsearch_db{$_};
    }
       }
   }
   
 output_date_error(server reference, error message) : outputs  1;
 an error message specific to bad date format.  
   
 =back  sub cleanup {
       if (tied(%groupsearch_db)) {
           unless (untie(%groupsearch_db)) {
     &Apache::lonnet::logthis('Failed cleanup searchcat: groupsearch_db');
           }
       }
       &untiehash();
       &Apache::lonmysql::disconnect_from_db();
   }
   
   __END__
   
   =pod
   
   =back 
   
 =cut  =cut
Removed from v.1.116  
changed lines
  Added in v.1.204

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