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Diff for /loncom/interface/lonsearchcat.pm between versions 1.11 and 1.120

version 1.11, 2001/03/15 13:23:15 version 1.120, 2002/06/10 23:55:47
Line 1 Line 1
 # The LearningOnline Network  # The LearningOnline Network with CAPA
 # Search Catalog  # Search Catalog
 #  #
 # 03/08/2001 Scott Harrison  # $Id$
 #  #
   # Copyright Michigan State University Board of Trustees
   #
   # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
   #
   # LON-CAPA is free software; you can redistribute it and/or modify
   # it under the terms of the GNU General Public License as published by
   # the Free Software Foundation; either version 2 of the License, or
   # (at your option) any later version.
   #
   # LON-CAPA is distributed in the hope that it will be useful,
   # but WITHOUT ANY WARRANTY; without even the implied warranty of
   # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   # GNU General Public License for more details.
   #
   # You should have received a copy of the GNU General Public License
   # along with LON-CAPA; if not, write to the Free Software
   # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
   #
   # /home/httpd/html/adm/gpl.txt
   #
   # http://www.lon-capa.org/
   #
   # YEAR=2001
   # 3/8, 3/12, 3/13, 3/14, 3/15, 3/19 Scott Harrison
   # 3/20, 3/21, 3/22, 3/26, 3/27, 4/2, 8/15, 8/24, 8/25 Scott Harrison
   # 10/12,10/14,10/15,10/16,11/28,11/29,12/10,12/12,12/16 Scott Harrison
   # YEAR=2002
   # 1/17 Scott Harrison
   #
   ###
   
   ###############################################################################
   ##                                                                           ##
   ## 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);
 use Apache::lonnet();  use Apache::lonnet();
 use Apache::File();  use Apache::File();
 use CGI qw(:standard);  use CGI qw(:standard);
   use Text::Query;
   use GDBM_File;
   use Apache::loncommon();
   
   # ---------------------------------------- variables used throughout the module
   
   # -- information holders
   my %hostdomains; # matches host name to host domain
   my %hostips; # matches host name to host ip
   my %hitcount; # stores number of hits per host
   
   # -- 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
   my $hidden;
   
   # -- miscellaneous variables
   my $scrout; # string that holds portions of the screen output
   my $yourself; # allows for quickly limiting to oneself
   my %hash;
   
   # ------------------------------------------ choices for different output views
   # Detailed Citation View ---> sub detailed_citation_view
   # Summary View ---> sub summary_view
   # Fielded Format ---> sub fielded_format_view
   # XML/SGML ---> sub xml_sgml_view
   my $basicviewselect=<<END;
   <select name='basicviewselect'>
   <option value='Detailed Citation View' selected="true">
   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' selected="true">
   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 %language;  # ----------------------------------------------------------------------- BEGIN
 my $scrout;  BEGIN {
 my %metadatafields;      {
 my %cprtag;   my $fh=Apache::File->new($Apache::lonnet::perlvar{'lonTabDir'}.
 my %mimetag;   '/hosts.tab');
    while (<$fh>) {
       $_=~/(\w+?)\:(\w+?)\:(\w+?)\:(.*)/; chomp;
       if ($3 eq 'library') {
    $hostdomains{$1}=$2;
    $hostips{$1}=$4;
       }
    }
       }
   }
   
   #------------------------------------------------------------- global variables
   my $diropendb = "";
   my $domain = "";
   
   # ----------------------------- Handling routine called via Apache and mod_perl
 sub handler {  sub handler {
     my $r = shift;      my $r = shift;
       untie %hash;
 # -------------------------------------- see if called from an interactive mode  
     map {  
        my ($name, $value) = split(/=/,$_);  
        $value =~ tr/+/ /;  
        $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;  
        if ($name eq 'catalogmode') {  
    $ENV{'form.'.$name}=$value;  
        }  
     } (split(/&/,$ENV{'QUERY_STRING'}));  
   
     $r->content_type('text/html');      $r->content_type('text/html');
     $r->send_http_header;      $r->send_http_header;
     return OK if $r->header_only;      return OK if $r->header_only;
   
     %metadatafields=();      $domain  = $r->dir_config('lonDefDomain');
       $diropendb= "/home/httpd/perl/tmp/$domain\_$ENV{'user.name'}_searchcat.db";
   
     my $hidden='';      &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
     $hidden=<<END if $ENV{'form.catalogmode'} eq 'interactive';               ['catalogmode','launch','acts','mode','form','element']);
 <input type='hidden' name='catalogmode' value='interactive'>  
 END  
   
 # ------------------------------------------------ First, check out environment  
     $metadatafields{'owner'}=$ENV{'user.name'}.'@'.$ENV{'user.domain'};  
   
 # --------------------------------- Compute various listings of metadata values      if ($ENV{'form.launch'} eq '1') {
        if (tie(%hash,'GDBM_File',$diropendb,&GDBM_WRCREAT,0640)) {
     %language=();      &start_fresh_session();
     $language{'any'}='Any language';      untie %hash;
     {   }
  my $fh=Apache::File->new($r->dir_config('lonTabDir').'/language.tab');   else {
  map {      $r->print('<html><head></head><body>Unable to tie hash to db '.
     $_=~/(\w+)\s+([\w\s\-]+)/;        'file</body></html>');
     $language{$1}=$2;      return OK;
  } <$fh>;   }
     }      }
   
     %cprtag=();  # --------------------------- Produce some output, so people know it is working
     $cprtag{'any'}='Any copyright/distribution';  
     {  
  my $fh=Apache::File->new($r->dir_config('lonIncludes').'/copyright.tab');  
  map {  
     $_=~/(\w+)\s+([\w\s\-]+)/;  
     $cprtag{$1}=$2;  
  } <$fh>;  
     }  
   
     %mimetag=();      $r->print("\n");
     $mimetag{'any'}='Any type';      $r->rflush;
     {  
  my $fh=Apache::File->new($r->dir_config('lonTabDir').'/filetypes.tab');  # ----------------------------------- configure dynamic components of interface
  map {  
     $_=~/(\w+)\s+(\w+)\s+([\w\s\-]+)/;      if ($ENV{'form.catalogmode'} eq 'interactive') {
     $mimetag{$1}=".$1 $3";   $hidden="<input type='hidden' name='catalogmode' value='interactive'>".
  } <$fh>;      "\n";
           $closebutton="<input type='button' name='close' value='CLOSE' ".
       "onClick='self.close()'>"."\n";
     }      }
       elsif ($ENV{'form.catalogmode'} eq 'groupsearch') {
    $hidden=<<END;
   <input type='hidden' name='catalogmode' value='groupsearch'>
   END
           $closebutton=<<END;
   <input type='button' name='close' value='CLOSE' onClick='self.close()'>
   END
           $importbutton=<<END;
   <input type='button' name='import' value='IMPORT'
   onClick='javascript:select_group()'>
   END
       }
       $hidden .= <<END;
   <input type='hidden' name='mode'    value='$ENV{'form.mode'}'>
   <input type='hidden' name='form'    value='$ENV{'form.form'}'>
   <input type='hidden' name='element' value='$ENV{'form.element'}'>
   <input type='hidden' name='date' value='2'>
   END
   # ------------------------------------------------------ Determine current user
       $yourself=$ENV{'user.name'}.'@'.$ENV{'user.domain'};
   
   # --- Now, depending on the interface actions, do one of three things here:
   # --- 1. a basic search
   # --- 2. an advanced search
   # --- 3. output a search interface
   
   # ----------------------------------- See if a search invocation should be done
     if ($ENV{'form.basicsubmit'} eq 'SEARCH') {      if ($ENV{'form.basicsubmit'} eq 'SEARCH') {
  return &basicsearch($r,$ENV{'form.basicexp'});   untie %hash; return &basicsearch($r,\%ENV);
       }
       elsif ($ENV{'form.advancedsubmit'} eq 'SEARCH') {
    untie %hash; return &advancedsearch($r,\%ENV);
     }      }
   
   # ----------------------------- Else, begin building search interface to output
     $scrout=''; # building a part of screen output      $scrout=''; # building a part of screen output
     $scrout.=&searchphrasefield('Limit by title','title',      $scrout.=&searchphrasefield('Limit by title','title',
  $ENV{'form.title'});   $ENV{'form.title'});
Line 96  END Line 209  END
     $scrout.=&searchphrasefield('Limit by URL','url',      $scrout.=&searchphrasefield('Limit by URL','url',
  $ENV{'form.url'});   $ENV{'form.url'});
   
     $scrout.=&searchphrasefield('Limit by version','version',  #    $scrout.=&searchphrasefield('Limit by version','version',
  $ENV{'form.version'});  # $ENV{'form.version'});
   
     $scrout.=&searchphrasefield('Limit by notes','notes',      $scrout.=&searchphrasefield('Limit by notes','notes',
  $ENV{'form.notes'});   $ENV{'form.notes'});
Line 105  END Line 218  END
     $scrout.=&searchphrasefield('Limit by abstract','abstract',      $scrout.=&searchphrasefield('Limit by abstract','abstract',
  $ENV{'form.abstract'});   $ENV{'form.abstract'});
   
     $ENV{'form.mime'}='notxxx' unless length($ENV{'form.mime'});      $ENV{'form.mime'}='any' unless length($ENV{'form.mime'});
     $scrout.=&selectbox('Limit by MIME type','mime',      $scrout.=&selectbox('Limit by MIME type','mime',
  $ENV{'form.mime'},%mimetag);   $ENV{'form.mime'},
    'any','Any type',
    \&{Apache::loncommon::filedescriptionex},
    (&Apache::loncommon::fileextensions));
   
     $ENV{'form.language'}='any' unless length($ENV{'form.language'});      $ENV{'form.language'}='any' unless length($ENV{'form.language'});
   
     $scrout.=&selectbox('Limit by language','language',      $scrout.=&selectbox('Limit by language','language',
  $ENV{'form.language'},%language);   $ENV{'form.language'},'any','Any Language',
        \&{Apache::loncommon::languagedescription},
    (&Apache::loncommon::languageids),
    );
   
 # ------------------------------------------------ Compute date selection boxes  # ------------------------------------------------ Compute date selection boxes
     $scrout.=<<CREATIONDATESTART;      $scrout.=<<CREATIONDATESTART;
 <p>  <p>
 <font color="#800000" face="helvetica"><b>LIMIT BY CREATION DATE RANGE:</b>  <font color="#800000" face="helvetica"><b>LIMIT BY CREATION DATE RANGE:</b>
 </font>  </font>
 <br>  <br />
 between:  between:
 CREATIONDATESTART  CREATIONDATESTART
     $scrout.=&dateboxes('creationdatestart',1,1,1976,      $scrout.=&dateboxes('creationdatestart',1,1,1976,
Line 142  CREATIONDATEEND Line 260  CREATIONDATEEND
 <p>  <p>
 <font color="#800000" face="helvetica"><b>LIMIT BY LAST REVISION DATE RANGE:  <font color="#800000" face="helvetica"><b>LIMIT BY LAST REVISION DATE RANGE:
 </b></font>  </b></font>
 <br>between:  <br />between:
 LASTREVISIONDATESTART  LASTREVISIONDATESTART
     $scrout.=&dateboxes('lastrevisiondatestart',1,1,1976,      $scrout.=&dateboxes('lastrevisiondatestart',1,1,1976,
  $ENV{'form.lastrevisiondatestart_month'},   $ENV{'form.lastrevisiondatestart_month'},
Line 161  LASTREVISIONDATEEND Line 279  LASTREVISIONDATEEND
   
     $scrout.=&searchphrasefield('Limit by publisher/owner','owner',      $scrout.=&searchphrasefield('Limit by publisher/owner','owner',
  $ENV{'form.owner'});   $ENV{'form.owner'});
 # $metadatafields{'owner'});  
   
     $ENV{'form.copyright'}='any' unless length($ENV{'form.copyright'});      $ENV{'form.copyright'}='any' unless length($ENV{'form.copyright'});
     $scrout.=&selectbox('Limit by copyright/distribution','copyright',      $scrout.=&selectbox('Limit by copyright/distribution','copyright',
  $ENV{'form.copyright'},%cprtag);   $ENV{'form.copyright'},
    'any','Any copyright/distribution',
    \&{Apache::loncommon::copyrightdescription},
    (&Apache::loncommon::copyrightids),
    );
   
   # ------------------------------------------- Compute customized metadata field
       $scrout.=<<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  # ---------------------------------------------------------------- Print screen
     $r->print(<<ENDDOCUMENT);      $r->print(<<ENDDOCUMENT);
 <html>  <html>
 <head>  <head>
 <title>The LearningOnline Network with CAPA</title>  <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();
       }
   </script>
 </head>  </head>
 <body bgcolor="#FFFFFF">  <body bgcolor="#FFFFFF">
 <img align=right src=/adm/lonIcons/lonlogos.gif>  <img align='right' src='/adm/lonIcons/lonlogos.gif' />
 <h1>Search Catalog</h1>  <h1>Search Catalog</h1>
 <form method="post" action="/adm/searchcat">  <form method="post" action="/adm/searchcat">
 $hidden  $hidden
 <hr>  <hr />
 <h3>Basic Search</h3>  <h3>Basic Search</h3>
 <p>  <p>
 Enter terms or phrases separated by search operators  Enter terms or phrases separated by search operators
 such as AND or OR then press SEARCH below.  Terms should be specific  such as AND, OR, or NOT then press SEARCH below.  Terms should be specific
 to the title, author, subject, notes, or abstract information associated  to the title, author, subject, notes, or abstract information associated
 with a resource.  with a resource.
 <br>  <br />
 ENDDOCUMENT  ENDDOCUMENT
     $r->print(&simpletextfield('basicexp',$ENV{'form.basicexp'}));      $r->print(&simpletextfield('basicexp',$ENV{'form.basicexp'}));
     $r->print(' ');      $r->print(' ');
     $r->print(&simplecheckbox('titleonly',$ENV{'form.titleonly'}));      $r->print(&simplecheckbox('titleonly',$ENV{'form.titleonly'}));
     $r->print('<font color="#800000">Title only</font> ');      $r->print('<font color="#800000">Title only</font> ');
     $r->print(&simplecheckbox('allversions',$ENV{'form.allversions'}));  #    $r->print(&simplecheckbox('allversions',$ENV{'form.allversions'}));
   # <font color="#800000">Search historic archives</font>
     $r->print(<<ENDDOCUMENT);      $r->print(<<ENDDOCUMENT);
 <font color="#800000">Search historic archives</font>  <br />
 <br>  <input type="submit" name="basicsubmit" value='SEARCH' />
 <input type="submit" name="basicsubmit" value="SEARCH">  <input type="reset" name="reset" value='RESET' />
 <input type="reset" name="reset" value="RESET">  $closebutton
 <input type="button" name="close" value="CLOSE" onClick="self.close()">  $basicviewselect
   <input type="button" value="HELP" onClick="openhelp()" />
 </p>  </p>
 <hr>  <hr />
 <h3>Advanced Search</h3>  <h3>Advanced Search</h3>
 $scrout  $scrout
 <p>  <p>
 <input type="submit" name="advancedsubmit" value="SEARCH">  <input type="submit" name="advancedsubmit" value='SEARCH' />
 <input type="reset" name="reset" value="RESET">  <input type="reset" name="reset" value='RESET' />
 <input type="button" name="close" value="CLOSE" onClick="self.close()">  $closebutton
   $advancedviewselect
   <input type="button" value="HELP" onClick="openhelp()" />
 </p>  </p>
 </form>  </form>
 </body>  </body>
Line 214  ENDDOCUMENT Line 370  ENDDOCUMENT
     return OK;      return OK;
 }   } 
   
 # --------------------------------------------------------- Various form fields  # ------------------------------------------------------------- make persistent
   sub make_persistent {
 sub textfield {      my $persistent='';
     my ($title,$name,$value)=@_;      
     return "\n<p><b>$title:</b><br>".      foreach (keys %ENV) {
            '<input type=text name="'.$name.'" size=80 value="'.$value.'">';   if (/^form\./ && !/submit/) {
       my $name=$_;
       my $key=$name;
       $ENV{$key}=~s/\'//g; # do not mess with html field syntax
       $name=~s/^form\.//;
       $persistent.=<<END;
   <input type='hidden' name='$name' value='$ENV{$key}' />
   END
           }
       }
       return $persistent;
 }  }
   
   # --------------------------------------------------------- Various form fields
   
 sub simpletextfield {  sub simpletextfield {
     my ($name,$value)=@_;      my ($name,$value)=@_;
     return '<input type=text name="'.$name.'" size=20 value="'.$value.'">';      return '<input type=text name=\''.$name.
      '\' size=20 value=\''.$value.'\' />';
 }  }
   
 sub simplecheckbox {  sub simplecheckbox {
     my ($name,$value)=@_;      my ($name,$value)=@_;
     my $checked='';      my $checked='';
     $checked="CHECKED" if $value eq 'on';      $checked="CHECKED" if $value eq 'on';
     return '<input type=checkbox name="'.$name.'" '. $checked . '>';      return '<input type=checkbox name=\''.$name.'\' '. $checked . '>';
 }  }
   
 sub searchphrasefield {  sub searchphrasefield {
     my ($title,$name,$value)=@_;      my ($title,$name,$value)=@_;
     my $instruction=<<END;      my $instruction=<<END;
 Enter terms or phrases separated by search operators such  Enter terms or phrases separated by search operators such
 as AND or OR.  as AND, OR, or NOT.
 END  END
     my $uctitle=uc($title);      my $uctitle=uc($title);
     return "\n<p><font color=\"#800000\" face=\"helvetica\"><b>$uctitle:</b>".      return "\n<p><font color=\"#800000\" face=\"helvetica\"><b>$uctitle:</b>".
    "</FONT> $instruction<br>".     "</FONT> $instruction<br />".
            '<input type=text name="'.$name.'" size=80 value="'.$value.'">';             '<input type=text name="'.$name.'" size=80 value=\''.$value.'\'>';
 }  }
   
 sub dateboxes {  sub dateboxes {
     my ($name,$defaultmonth,$defaultday,$defaultyear,      my ($name,$defaultmonth,$defaultday,$defaultyear,
  $currentmonth,$currentday,$currentyear)=@_;   $currentmonth,$currentday,$currentyear)=@_;
     ($defaultmonth,$defaultday,$defaultyear)=('','','');      ($defaultmonth,$defaultday,$defaultyear)=('','','');
     my $month=<<END;      #
 <select name="${name}_month">      # Day
 <option value='$defaultmonth'> </option>  
 <option value="1">January</option>  
 <option value="2">February</option>  
 <option value="3">March</option>  
 <option value="4">April</option>  
 <option value="5">May</option>  
 <option value="6">June</option>  
 <option value="7">July</option>  
 <option value="8">August</option>  
 <option value="9">September</option>  
 <option value="10">October</option>  
 <option value="11">November</option>  
 <option value="12">December</option>  
 </select>  
 END  
     $month=~s/(\"$currentmonth\")/$1 SELECTED/ if length($currentmonth);  
     my $day=<<END;      my $day=<<END;
 <select name="${name}_day">  <select name="${name}_day">
 <option value='$defaultday'> </option>  <option value='$defaultday'> </option>
 <option value="1">1</option>  
 <option value="2">2</option>  
 <option value="3">3</option>  
 <option value="4">4</option>  
 <option value="5">5</option>  
 <option value="6">6</option>  
 <option value="7">7</option>  
 <option value="8">8</option>  
 <option value="9">9</option>  
 <option value="10">10</option>  
 <option value="11">11</option>  
 <option value="12">12</option>  
 <option value="13">13</option>  
 <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  END
       for (my $i = 1; $i<=31; $i++) {
    $day.="<option value=\"$i\">$i</option>\n";
       }
       $day.="</select>\n";
     $day=~s/(\"$currentday\")/$1 SELECTED/ if length($currentday);      $day=~s/(\"$currentday\")/$1 SELECTED/ if length($currentday);
       #
       # Month
       my $month=<<END;
   <select name="${name}_month">
   <option value='$defaultmonth'> </option>
   END
       my $i = 1;
       foreach (qw/January February March April May June 
        July August September October November December /){
    $month .="<option value=\"$i\">$_</option>\n";
    $i++;
       }
       $month.="</select>\n";
       $month=~s/(\"$currentmonth\")/$1 SELECTED/ if length($currentmonth);
       #
       # Year (obviously)
     my $year=<<END;      my $year=<<END;
 <select name="${name}_year">  <select name="${name}_year">
 <option value='$defaultyear'> </option>  <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  END
       my $maxyear = 2051; 
       for (my $i = 1976; $i<=$maxyear; $i++) {
    $year.="<option value=\"$i\">$i</option>\n";
       }
       $year.="</select>\n";
     $year=~s/(\"$currentyear\")/$1 SELECTED/ if length($currentyear);      $year=~s/(\"$currentyear\")/$1 SELECTED/ if length($currentyear);
     return "$month$day$year";      return "$month$day$year";
 }  }
   
 sub selectbox {  sub selectbox {
     my ($title,$name,$value,%options)=@_;      my ($title,$name,$value,$anyvalue,$anytag,$functionref,@idlist)=@_;
     my $uctitle=uc($title);      my $uctitle=uc($title);
     my $selout="\n<p><font color=\"#800000\" face=\"helvetica\"><b>$uctitle:".      my $selout="\n<p><font color=\"#800000\" face=\"helvetica\"><b>$uctitle:".
  "</b></font><br>".'<select name="'.$name.'">';   "</b></font><br />".'<select name="'.$name.'">';
     map {      foreach ($anyvalue,@idlist) {
         $selout.='<option value="'.$_.'"';          $selout.='<option value=\''.$_.'\'';
         if ($_ eq $value) { $selout.=' selected'; }          if ($_ eq $value and !/^any$/) {
         $selout.='>'.$options{$_}.'</option>';      $selout.=' selected>'.&{$functionref}($_).'</option>';
     } sort keys %options;   }
    elsif ($_ eq $value and /^$anyvalue$/) {
       $selout.=' selected>'.$anytag.'</option>';
    }
           else {$selout.='>'.&{$functionref}($_).'</option>';}
       }
     return $selout.'</select>';      return $selout.'</select>';
 }  }
   
   # ----------------------------------------------- Performing an advanced search
   sub advancedsearch {
       my ($r,$envhash)=@_;
       my %ENV=%{$envhash};
   
       my $fillflag=0;
       # Clean up fields for safety
       for my $field ('title','author','subject','keywords','url','version',
      'creationdatestart_month','creationdatestart_day',
      'creationdatestart_year','creationdateend_month',
      'creationdateend_day','creationdateend_year',
      'lastrevisiondatestart_month','lastrevisiondatestart_day',
      'lastrevisiondatestart_year','lastrevisiondateend_month',
      'lastrevisiondateend_day','lastrevisiondateend_year',
      'notes','abstract','mime','language','owner',
      'custommetadata','customshow') {
    $ENV{"form.$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;
       }
       # Check to see if enough information was filled in
       for my $field ('title','author','subject','keywords','url','version',
      'notes','abstract','mime','language','owner',
      'custommetadata') {
    if (&filled($ENV{"form.$field"})) {
       $fillflag++;
    }
       }
       unless ($fillflag) {
    &output_blank_field_error($r);
    return OK;
       }
   
   
       # Turn the form input into a SQL-based query
       my $query='';
   
       my @queries;
       # Evaluate logical expression AND/OR/NOT phrase fields.
       foreach my $field ('title','author','subject','notes','abstract','url',
          'keywords','version','owner') {
    if ($ENV{'form.'.$field}) {
       push @queries,&build_SQL_query($field,$ENV{'form.'.$field});
    }
       }
       # Evaluate option lists
       if ($ENV{'form.language'} and $ENV{'form.language'} ne 'any') {
    push @queries,"(language like \"$ENV{'form.language'}\")";
       }
       if ($ENV{'form.mime'} and $ENV{'form.mime'} ne 'any') {
    push @queries,"(mime like \"$ENV{'form.mime'}\")";
       }
       if ($ENV{'form.copyright'} and $ENV{'form.copyright'} ne 'any') {
    push @queries,"(copyright like \"$ENV{'form.copyright'}\")";
       }
       # Evaluate date windows
       my $datequery=&build_date_queries(
    $ENV{'form.creationdatestart_month'},
    $ENV{'form.creationdatestart_day'},
    $ENV{'form.creationdatestart_year'},
    $ENV{'form.creationdateend_month'},
    $ENV{'form.creationdateend_day'},
    $ENV{'form.creationdateend_year'},
    $ENV{'form.lastrevisiondatestart_month'},
    $ENV{'form.lastrevisiondatestart_day'},
    $ENV{'form.lastrevisiondatestart_year'},
    $ENV{'form.lastrevisiondateend_month'},
    $ENV{'form.lastrevisiondateend_day'},
    $ENV{'form.lastrevisiondateend_year'},
    );
       # Test to see if date windows are legitimate
       if ($datequery=~/^Incorrect/) {
    &output_date_error($r,$datequery);
    return OK;
       }
       elsif ($datequery) {
    push @queries,$datequery;
       }
   
       # Process form information for custom metadata querying
       my $customquery='';
       if ($ENV{'form.custommetadata'}) {
    $customquery=&build_custommetadata_query('custommetadata',
         $ENV{'form.custommetadata'});
       }
       my $customshow='';
       if ($ENV{'form.customshow'}) {
    $customshow=$ENV{'form.customshow'};
    $customshow=~s/[^\w\s]//g;
    my @fields=split(/\s+/,$customshow);
    $customshow=join(" ",@fields);
       }
       # Send query statements over the network to be processed by either the SQL
       # database or a recursive scheme of 'grep'-like actions (for custom
       # metadata).
       if (@queries) {
    $query=join(" AND ",@queries);
    $query="select * from metadata where $query";
    my $reply; # reply hash reference
    unless ($customquery or $customshow) {
       $reply=&Apache::lonnet::metadata_query($query);
    }
    else {
       $reply=&Apache::lonnet::metadata_query($query,
      $customquery,$customshow);
    }
    &output_results('Advanced',$r,$envhash,$customquery,$reply);
       }
       elsif ($customquery) {
    my $reply; # reply hash reference
    $reply=&Apache::lonnet::metadata_query('',
          $customquery,$customshow);
    &output_results('Advanced',$r,$envhash,$customquery,$reply);
       }
       # should not get to this point
       return 'Error.  Should not have gone to this point.';
   }
   
 # --------------------------------------------------- Performing a basic search  # --------------------------------------------------- Performing a basic search
 sub basicsearch {  sub basicsearch {
     my ($r,$expression)=@_;      my ($r,$envhash)=@_;
       my %ENV=%{$envhash};
     my $query=$expression;      # Clean up fields for safety
     $query="select * from metadata where concat(title,\"    \",author) like '\%$expression\%'";      for my $field ('basicexp') {
     my $reply=&Apache::lonnet::reply("querysend:$query",'msul3');   $ENV{"form.$field"}=~s/[^\w\s\(\)\-]//g;
       }
     my @results;      foreach ('mode','form','element') {
    # is this required?  Hmmm.
     my $replyfile='';   next unless (exists($ENV{"form.$_"}));
     $reply=~/^([\.\w]+)$/; # must do since 'use strict' checks for tainting   $ENV{"form.$_"}=&Apache::lonnet::unescape($ENV{"form.$_"});
     $replyfile=$r->dir_config('lonDaemons').'/tmp/'.$1;   $ENV{"form.$_"}=~s/[^\w\/\s\(\)\=\-\"\']//g;
     $reply=~/(.*?)\_/;      }
     my $hostname=$1;  
   
     {      # Check to see if enough is filled in
  while (1) {      unless (&filled($ENV{'form.basicexp'})) {
     last if -e $replyfile;   &output_blank_field_error($r);
     sleep 1;   return OK;
  }  
  # QUESTION: how should I handle this error condition..  
  # I'm sure there is syntax elsewhere I can use..  
  my $fh=Apache::File->new($replyfile) or  
        ($r->print('file cannot be opened') and return OK);  
        @results=<$fh>;  
     }      }
   
     my $compiledresult='';      # Build SQL query string based on form page
       my $query='';
       my $concatarg=join(',"    ",',
          ('title', 'author', 'subject', 'notes', 'abstract'));
       $concatarg='title' if $ENV{'form.titleonly'};
   
     foreach my $result (@results) {      $query=&build_SQL_query('concat('.$concatarg.')',$ENV{'form.'.'basicexp'});
  my ($title,$author,$subject,$url,$keywords,$version,  
     $notes,$abstract,$mime,$lang,      # Get reply (either a hash reference to filehandles or bad connection)
     $creationdate,$lastrevisiondate,$owner,$copyright      my $reply=&Apache::lonnet::metadata_query('select * from metadata where '.$query);
     )=map {&Apache::lonnet::unescape($_)} (split(/\,/,$result));  
  my $shortabstract=$abstract;      # Output search results
  $shortabstract=substr($abstract,0,200) if length($abstract)>200;  
  $compiledresult.=<<END;      &output_results('Basic',$r,$envhash,$query,$reply);
 <p>  
 END      return OK;
  $compiledresult.=<<END if $ENV{'form.catalogmode'} eq 'interactive';  
 <font size='-1'><INPUT TYPE="button" NAME="returnvalues" VALUE="SELECT"  
 onClick="javascript:select_data('$title','$url')">  
 </font>  
 <br>  
 END  
         $compiledresult.=<<END;  
 <b>URL: </b> $url<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>Abstract:</b> $shortabstract<br>  
 <b>MIME Type:</b> $mimetag{$mime}<br>  
 <b>Language:</b> $language{$lang}<br>  
 <b>Creation Date:</b> $creationdate<br>  
 <b>Last Revision Date:</b> $lastrevisiondate<br>  
 <b>Publisher/Owner:</b> $owner<br>  
 <b>Copyright/Distribution:</b> $copyright<br>  
 <b>Repository Location:</b> $hostname  
 </p>  
 END  
 }  }
   
     unless ($compiledresult) {  # ------------------------------------------------------------- build_SQL_query
  $compiledresult="There were no results that matched your query";  sub build_SQL_query {
       my ($field_name,$logic_statement)=@_;
       my $q=new Text::Query('abc',
     -parse => 'Text::Query::ParseAdvanced',
     -build => 'Text::Query::Build');
       $q->prepare($logic_statement);
       my $matchexp=${$q}{'matchexp'}; chomp $matchexp;
       my $sql_query=&recursive_SQL_query_build($field_name,$matchexp);
       return $sql_query;
   }
   
   # ------------------------------------------------- build custom metadata query
   sub build_custommetadata_query {
       my ($field_name,$logic_statement)=@_;
       my $q=new Text::Query('abc',
     -parse => 'Text::Query::ParseAdvanced',
     -build => 'Text::Query::BuildAdvancedString');
       $q->prepare($logic_statement);
       my $matchexp=${$q}{'-parse'}{'-build'}{'matchstring'};
       # quick fix to change literal into xml tag-matching
       # will eventually have to write a separate builder module
       my $oldmatchexp=$matchexp;
       $matchexp=~s/(\w+)\\\=([\w\\\+]+)/\\\<$1\\\>\[\^\\\<\]\*$2\[\^\\\<\]\*\\\<\\\/$1\\\>/g;
       return $matchexp;
   }
   
   # - Recursively parse a reverse notation expression into a SQL query expression
   sub recursive_SQL_query_build {
       my ($dkey,$pattern)=@_;
       my @matches=($pattern=~/(\[[^\]|\[]*\])/g);
       return $pattern unless @matches;
       foreach my $match (@matches) {
    $match=~/\[ (\w+)\s(.*) \]/;
    my ($key,$value)=($1,$2);
    my $replacement='';
    if ($key eq 'literal') {
       $replacement="($dkey like \"\%$value\%\")";
    }
    elsif ($key eq 'not') {
       $value=~s/like/not like/;
   #    $replacement="($dkey not like $value)";
       $replacement="$value";
    }
    elsif ($key eq 'and') {
       $value=~/(.*[\"|\)]) ([|\(|\^].*)/;
       $replacement="($1 AND $2)";
    }
    elsif ($key eq 'or') {
       $value=~/(.*[\"|\)]) ([|\(|\^].*)/;
       $replacement="($1 OR $2)";
    }
    substr($pattern,
          index($pattern,$match),
          length($match),
          $replacement
          );
     }      }
       &recursive_SQL_query_build($dkey,$pattern);
   }
   
   # ------------------------------------------------------------ Build date query
   sub build_date_queries {
       my ($cmonth1,$cday1,$cyear1,$cmonth2,$cday2,$cyear2,
    $lmonth1,$lday1,$lyear1,$lmonth2,$lday2,$lyear2)=@_;
       my @queries;
       if ($cmonth1 or $cday1 or $cyear1 or $cmonth2 or $cday2 or $cyear2) {
    unless ($cmonth1 and $cday1 and $cyear1 and
    $cmonth2 and $cday2 and $cyear2) {
       return "Incorrect entry for the creation date.  You must specify ".
      "a starting month, day, and year and an ending month, ".
      "day, and year.";
    }
    my $cnumeric1=sprintf("%d%2d%2d",$cyear1,$cmonth1,$cday1);
    $cnumeric1+=0;
    my $cnumeric2=sprintf("%d%2d%2d",$cyear2,$cmonth2,$cday2);
    $cnumeric2+=0;
    if ($cnumeric1>$cnumeric2) {
       return "Incorrect entry for the creation date.  The starting ".
      "date must occur before the ending date.";
    }
    my $cquery="(creationdate BETWEEN '$cyear1-$cmonth1-$cday1' AND '".
              "$cyear2-$cmonth2-$cday2 23:59:59')";
    push @queries,$cquery;
       }
       if ($lmonth1 or $lday1 or $lyear1 or $lmonth2 or $lday2 or $lyear2) {
    unless ($lmonth1 and $lday1 and $lyear1 and
    $lmonth2 and $lday2 and $lyear2) {
       return "Incorrect entry for the last revision date.  You must ".
      "specify a starting month, day, and year and an ending ".
      "month, day, and year.";
    }
    my $lnumeric1=sprintf("%d%2d%2d",$lyear1,$lmonth1,$lday1);
    $lnumeric1+=0;
    my $lnumeric2=sprintf("%d%2d%2d",$lyear2,$lmonth2,$lday2);
    $lnumeric2+=0;
    if ($lnumeric1>$lnumeric2) {
       return "Incorrect entry for the last revision date.  The ".
      "starting date must occur before the ending date.";
    }
    my $lquery="(lastrevisiondate BETWEEN '$lyear1-$lmonth1-$lday1' AND '".
              "$lyear2-$lmonth2-$lday2 23:59:59')";
    push @queries,$lquery;
       }
       if (@queries) {
    return join(" AND ",@queries);
       }
       return '';
   }
   
   # ----------------------------- format and output results based on a reply list
   # There are two windows that this function writes to.  The main search
   # window ("srch") has a listing of the results.  A secondary window ("popwin")
   # gives the status of the network search (time elapsed, number of machines
   # contacted, etc.)
   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      # make query information persistent to allow for subsequent revision
     my $persistent='';      my $persistent=&make_persistent();
     map {  
  if (/^form\./ && !/submit/) {  
     my $name=$_;  
     my $key=$name;  
     $name=~s/^form\.//;  
     $persistent.=<<END;  
 <INPUT TYPE='hidden' NAME='$name' VALUE='$ENV{$key}'>  
 END  
         }  
     } (keys %ENV);  
   
     $r->print(<<BEGINNING);      # output beginning of search page
    $r->print(<<BEGINNING);
 <html>  <html>
 <head>  <head>
 <title>The LearningOnline Network with CAPA</title>  <title>The LearningOnline Network with CAPA</title>
 BEGINNING  BEGINNING
     $r->print(<<SCRIPT) if $ENV{'form.catalogmode'} eq 'interactive';  
 <script>      # conditional output of script functions dependent on the mode in
       # which the search was invoked
       if ($ENV{'form.catalogmode'} eq 'interactive'){
    if (! exists($ENV{'form.mode'}) || $ENV{'form.mode'} ne 'edit') {
               $r->print(<<SCRIPT) 
   <script type="text/javascript">
     function select_data(title,url) {      function select_data(title,url) {
  changeTitle(title);   changeTitle(title);
  changeURL(url);   changeURL(url);
    self.close();
     }      }
     function changeTitle(val) {      function changeTitle(val) {
  if (opener.inf.document.forms.resinfo.elements.t) {   if (opener.inf.document.forms.resinfo.elements.t) {
Line 508  BEGINNING Line 797  BEGINNING
     }      }
 </script>  </script>
 SCRIPT  SCRIPT
     $r->print(<<RESULTS);          } elsif ($ENV{'form.mode'} eq 'edit') {
               my $form = $ENV{'form.form'};
               my $element = $ENV{'form.element'};
               $r->print(<<SCRIPT) 
   <script type="text/javascript">
   function select_data(title,url) {
       changeURL(url);
       self.close();
   }
   function changeTitle(val) {
   }
   function changeURL(val) {
       if (window.opener.document) {
           window.opener.document.forms["$form"].elements["$element"].value=val;
       } else {
    var url = 'forms[\"$form\"].elements[\"$element\"].value';
           alert("Unable to transfer data to "+url);
       }
   }
   </script>
   SCRIPT
           }
       }
       $r->print(<<SCRIPT) if $ENV{'form.catalogmode'} eq 'groupsearch';
   <script type="text/javascript">
       function select_data(title,url) {
   // alert('DEBUG: Should be storing '+title+' and '+url);
       }
       function queue(val) {
    if (eval("document.forms.results.returnvalues["+val+"].checked")) {
       document.forms.results.acts.value+='1a'+val+'b';
    }
    else {
       document.forms.results.acts.value+='0a'+val+'b';
    }
       }
       function select_group() {
    window.location=
       "/adm/groupsort?mode=$ENV{'form.mode'}&catalogmode=groupsearch&acts="+
       document.forms.results.acts.value;
       }
   </script>
   SCRIPT
       $r->print(<<SCRIPT);
   <script type="text/javascript">
       function displayinfo(val) {
    popwin.document.forms.popremain.sdetails.value=val;
       }
       function openhelp(val) {
    openhelpwin=open('/adm/help/searchcat.html','helpscreen',
        'scrollbars=1,width=400,height=300');
    openhelpwin.focus();
       }
       function abortsearch(val) {
    popwin.close();
       }
   </script>
   SCRIPT
       $r->rflush();
   
       # begin showing the cataloged results
       $r->print(<<CATALOGBEGIN);
 </head>  </head>
 <body bgcolor="#ffffff">  <body bgcolor="#ffffff">
 <img align=right src=/adm/lonIcons/lonlogos.gif>  <img align=right src=/adm/lonIcons/lonlogos.gif>
 <h1>Search Catalog</h1>  <h1>Search Catalog</h1>
 <form method="post" action="/adm/searchcat">  CATALOGBEGIN
           $r->print(<<CATALOGCONTROLS);
   <form name='results' method="post" action="/adm/searchcat">
   $hidden
   <input type='hidden' name='acts' value='' />
 <input type='button' value='Revise search request'  <input type='button' value='Revise search request'
 onClick='this.form.submit();'>  onClick='this.form.submit();' />
 <input type='button' value='CLOSE'  $importbutton
 onClick='self.close();'>  $closebutton
 $persistent  $persistent
 <hr>  <hr />
 <h3>Search Query</h3>  <h3>Search Query</h3>
   CATALOGCONTROLS
       if ($mode eq 'Basic') {
    $r->print(<<RESULTS);
   <p>
   <b>Basic search:</b> $ENV{'form.basicexp'}
   </p>
   RESULTS
       }
       elsif ($mode eq 'Advanced') {
    $r->print(<<RESULTS);
 <p>  <p>
 <b>Basic search:</b> $expression  <b>Advanced search</b>
   $query
 </p>  </p>
 <h3>Search Results</h3>  RESULTS
       }
       $r->print('<h3>Search Results</h3>');
       $r->rflush();
       my $servernum=(keys %rhash)+0;
   
       # 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="close this window" '+
    ' 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;
       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 ($reply eq 'con_lost') {
       &popwin_imgupdate($r,$sn,"srvbad.gif");
       $bloop--;
       $orkey{$rkey}=1;
    }
    else {
       $reply=~/^([\.\w]+)$/; # must do since 'use strict' checks for tainting
       $replyfile=$r->dir_config('lonDaemons').'/tmp/'.$1;
       $reply=~/(.*?)\_/;
       {
    my $temp=0;
         WLOOP: while (1) {
     if (-e $replyfile && $tflag) {
         &popwin_imgupdate($r,$sn,"srvhalf.gif");
         &popwin_js($r,'popwin.hc["'.$rkey.'"]='.
    '"still transferring..."'.';');
         $tflag=0;
     }
     if (-e "$replyfile.end") {
         $bloop--;
         $orkey{$rkey}=1;
         if (-s $replyfile) {
     &popwin_imgupdate($r,$sn,"srvgood.gif");
     my $fh=Apache::File->new($replyfile) or 
         ($r->print('ERROR: file '.
    $replyfile.' cannot be opened') and
          return OK);
     @results=<$fh> if $fh;
     $hitcount{$rkey}=@results+0;
     &popwin_js($r,'popwin.hc["'.$rkey.'"]='.
       $hitcount{$rkey}.';');
     $hitcountsum+=$hitcount{$rkey};
     &popwin_js($r,'popwin.document.forms.popremain.'.
       'numhits.value='.$hitcountsum.';');
         }
         else {
     &popwin_imgupdate($r,$sn,"srvempty.gif");
     &popwin_js($r,'popwin.hc["'.$rkey.'"]=0;');
         }
         last WLOOP;
     }
     if ($temp>1) {
         sleep 1;
         $timeremain--;
         $elapsetime++;
         last WLOOP;
     }
     last WLOOP unless $timeremain;
     sleep 1;
     $timeremain--;
     $elapsetime++;
     &popwin_js($r,"popwin.document.popremain.".
          "elapsetime.value=$elapsetime;");
     $temp++;
         }
       }
       &popwin_js($r,'popwin.document.whirly.'.
          'src="/adm/lonIcons/lonanimend.gif";');
    }
    my $customshow='';
    my $extrashow='';
    my @customfields;
    if ($ENV{'form.customshow'}) {
       $customshow=$ENV{'form.customshow'};
       $customshow=~s/[^\w\s]//g;
       my @fields=map {"<font color=\"#008000\">$_:</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 ($title) { $title='<i>Untitled</i>'; }
    unless ($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');
   <font size='-1'><INPUT TYPE="button" NAME="returnvalues" VALUE="SELECT"
   onClick="javascript:select_data('$titleesc','$url')">
   </font>
   <br />
   END
                   }
                   if ($ENV{'form.catalogmode'} eq 'groupsearch') {
       $fnum+=0;
       $hash{"pre_${fnum}_link"}=$url;
       $hash{"pre_${fnum}_title"}=$title;
       $compiledresult.=<<END;
   <font size='-1'>
   <input type="checkbox" name="returnvalues" value="SELECT"
   onClick="javascript:queue($fnum)" />
   </font>
   <br />
   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;
           }
           else {
       $r->print('<html><head></head><body>Unable to tie hash to db '.
     'file</body></html>');
    }
    if ($compiledresult) {
       $resultflag=1;
    }
   
    $r->print(<<RESULTS);
 $compiledresult  $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>  </body>
 </html>  </html>
 RESULTS  RESULTS
   }
   
     return OK;  # ------------------------------------------------------ Detailed Citation View
   sub detailed_citation_view {
       my ($title,$author,$subject,$url,$keywords,$version,
    $notes,$shortabstract,$mime,$lang,
    $creationdate,$lastrevisiondate,$owner,$copyright,
    $hostname,$httphost,$extrashow)=@_;
       my $result=<<END;
   <i>$owner</i>, last revised $lastrevisiondate
   <h3><A HREF="http://$httphost$url" TARGET='search_preview'>$title</A></h3>
   <h3>$author</h3>
   </p>
   <p>
   <b>Subject:</b> $subject<br />
   <b>Keyword(s):</b> $keywords<br />
   <b>Notes:</b> $notes<br />
   <b>MIME Type:</b>
   END
       $result.=&Apache::loncommon::filedescription($mime);
       $result.=<<END;
   <br />
   <b>Language:</b> 
   END
       $result.=&Apache::loncommon::languagedescription($lang);
       $result.=<<END;
   <br />
   <b>Copyright/Distribution:</b> 
   END
       $result.=&Apache::loncommon::copyrightdescription($copyright);
       $result.=<<END;
   <br />
   </p>
   $extrashow
   <p>
   $shortabstract
   </p>
   END
       return $result;
   }
   
   # ---------------------------------------------------------------- Summary View
   sub summary_view {
       my ($title,$author,$subject,$url,$keywords,$version,
    $notes,$shortabstract,$mime,$lang,
    $creationdate,$lastrevisiondate,$owner,$copyright,
    $hostname,$httphost,$extrashow)=@_;
       my $cprtag=&Apache::loncommon::copyrightdescription($copyright);
       my $result=<<END;
   <a href="http://$httphost$url" TARGET='search_preview'>$author</a><br />
   $title<br />
   $owner -- $lastrevisiondate<br />
   $cprtag<br />
   $extrashow
   </p>
   END
       return $result;
   }
   
   # -------------------------------------------------------------- Fielded Format
   sub fielded_format_view {
       my ($title,$author,$subject,$url,$keywords,$version,
    $notes,$shortabstract,$mime,$lang,
    $creationdate,$lastrevisiondate,$owner,$copyright,
    $hostname,$httphost,$extrashow)=@_;
       my $mimetag=&Apache::loncommon::filedescription($mime);
       my $language=&Apache::loncommon::languagedescription($lang);
       my $cprtag=&Apache::loncommon::copyrightdescription($copyright);
       my $result=<<END;
   <b>URL: </b> <A HREF="http://$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,
    $creationdate,$lastrevisiondate,$owner,$copyright,
    $hostname,$httphost,$extrashow)=@_;
       my $cprtag=&Apache::loncommon::copyrightdescription($copyright);
       my $mimetag=&Apache::loncommon::filedescription($mime);
       my $language=&Apache::loncommon::languagedescription($lang);
       my $result=<<END;
   <pre>
   &lt;LonCapaResource&gt;
   &lt;url&gt;$url&lt;/url&gt;
   &lt;title&gt;$title&lt;/title&gt;
   &lt;author&gt;$author&lt;/author&gt;
   &lt;subject&gt;$subject&lt;/subject&gt;
   &lt;keywords&gt;$keywords&lt;/keywords&gt;
   &lt;notes&gt;$notes&lt;/notes&gt;
   &lt;mimeInfo&gt;
   &lt;mime&gt;$mime&lt;/mime&gt;
   &lt;mimetag&gt;$mimetag&lt;/mimetag&gt;
   &lt;/mimeInfo&gt;
   &lt;languageInfo&gt;
   &lt;language&gt;$lang&lt;/language&gt;
   &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;
   }
   
   # ---------------------------------------------------- see if a field is filled
   sub filled {
       my ($field)=@_;
       if ($field=~/\S/ && $field ne 'any') {
    return 1;
       }
       else {
    return 0;
       }
   }
   
   # ---------------- 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);
   <html>
   <head>
   <title>The LearningOnline Network with CAPA</title>
   BEGINNING
       $r->print(<<RESULTS);
   </head>
   <body bgcolor="#ffffff">
   <img align='right' src='/adm/lonIcons/lonlogos.gif' />
   <h1>Search Catalog</h1>
   <form method="post" action="/adm/searchcat">
   $persistent
   <input type='button' value='Revise search request'
   onClick='this.form.submit();' />
   $closebutton
   <hr />
   <h3>Helpful Message</h3>
   <p>
   Incorrect search query due to blank entry fields.
   You need to fill in the relevant
   fields on the search page in order for a query to be
   processed.
   </p>
   </body>
   </html>
   RESULTS
   }
   
   # ----------------------------------------------------------- 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);
   <html>
   <head>
   <title>The LearningOnline Network with CAPA</title>
   BEGINNING
       $r->print(<<RESULTS);
   </head>
   <body bgcolor="#ffffff">
   <img align='right' src='/adm/lonIcons/lonlogos.gif' />
   <h1>Search Catalog</h1>
   <form method="post" action="/adm/searchcat">
   $persistent
   <input type='button' value='Revise search request'
   onClick='this.form.submit();' />
   $closebutton
   <hr />
   <h3>Helpful Message</h3>
   <p>
   $message
   </p>
   </body>
   </html>
   RESULTS
   }
   
   # --------- settings whenever the user causes the search window to be launched
   sub start_fresh_session {
       delete $hash{'mode_catalog'};
       foreach (keys %hash) {
           if ($_ =~ /^pre_/) {
               delete $hash{$_};
           }
           if ($_ =~ /^store/) {
       delete $hash{$_};
    }
       }
   }
   
   # ----------------------------------------------- send javascript to popwin
   sub popwin_js {
       # Print javascript out to popwin, but make sure we dont generate
       # any javascript errors in doing so.
       my ($r,$text) = @_;
       $r->print(<<"END");
   <script type="text/javascript">
       if (! popwin.closed) {
    $text
       }
   </script>
   END
       $r->rflush();
 }  }
   
   sub popwin_imgupdate {
       my ($r,$imgnum,$icon) = @_;
       &popwin_js($r,'popwin.document.img'.$imgnum.'.'.
          'src="/adm/lonIcons/'.$icon.'";');
   }    
   
 1;  1;
   
 __END__  __END__
   
   =head1 NAME
   
   Apache::lonsearchcat - mod_perl module for handling a searchable catalog
   
   =head1 SYNOPSIS
   
   Invoked by /etc/httpd/conf/srm.conf:
   
    <Location /adm/searchcat>
    PerlAccessHandler       Apache::lonacc
    SetHandler perl-script
    PerlHandler Apache::lonsearchcat
    ErrorDocument     403 /adm/login
    ErrorDocument  500 /adm/errorhandler
    </Location>
   
   =head1 INTRODUCTION
   
   This module enables searching for a distributed browseable catalog.
   
   This is part of the LearningOnline Network with CAPA project
   described at http://www.lon-capa.org.
   
   =head1 BEGIN SUBROUTINE
   
   This routine is only run once after compilation.
   
   =over 4
   
   =item *
   
   Initializes %hostdomains and hostips hash table (for hosts.tab).
   
   =back
   
   =head1 HANDLER SUBROUTINE
   
   This routine is called by Apache and mod_perl.
   
   =over 4
   
   =item *
   
   configure dynamic components of interface
   
   =item *
   
   determine current user
   
   =item *
   
   see if a search invocation should be done
   
   =item *
   
   else, begin building search interface to output
   
   =item *
   
   compute date selection boxes
   
   =item *
   
   compute customized metadata field
   
   =item *
   
   print screen
   
   =back
   
   =head1 OTHER SUBROUTINES
   
   =over 4
   
   =item *
   
   get_unprocessed_cgi() : reads in critical name/value pairs that may have not
   been processed and passed into %ENV by the web server
   
   =item *
   
   make_persistent() : makes a set of hidden HTML fields to make
   SQL search interface information to be persistent
   
   =back
   
   WEB INTERFACE COMPONENT FUNCTIONS
   
   =over 4
   
   =item *
   
   simpletextfield(name,value) : returns HTML formatted string for simple text
   field
   
   =item *
   
   simplecheckbox(name,value) : returns HTML formatted string for simple
   checkbox
   
   =item *
   
   searchphrasefield(title,name,value) : returns HTML formatted string for
   a search expression phrase field
   
   =item *
   
   dateboxes(name, defaultmonth, defaultday, defaultyear) : returns HTML
   formatted string for a calendar date
   
   =item *
   
   selectbox(title,name,value,%HASH=options) : returns HTML formatted string for
   a selection box field
   
   =back
   
   SEARCH FUNCTIONS
   
   =over 4
   
   =item *
   
   advancedsearch(server reference, environment reference) : perform a complex
   multi-field logical query
   
   =item *
   
   basicsearch(server reference, environment reference) : perform a simple
   single-field logical query
   
   =item *
   
   build_SQL_query(field name, logic) : builds a SQL query string from a
   logical expression with AND/OR keywords
   
   =item *
   
   build_custommetadata_query(field_name, logic_statement) : builds a perl
   regular expression from a logical expression with AND/OR keywords
   
   =item *
   
   recursive_SQL_query_build(field name, reverse notation expression) : 
   builds a SQL query string from a reverse notation expression
   logical expression with AND/OR keywords
   
   =item *
   
   build_date_queries(cmonth1, cday1, cyear1, cmonth2, cday2, cyear2,
   lmonth1, lday1, lyear1, lmonth2, lday2, lyear2) :
   Builds a SQL logic query to check time/date entries.
   
   =back
   
   OUTPUTTING RESULTS FUNCTION
   
   =over 4
   
   =item *
   
   output_results(output mode, server reference, environment reference,
   reply list reference) : outputs results from search
   
   =back
   
   DIFFERENT WAYS TO VIEW METADATA RECORDS
   
   =over 4
   
   =item *
   
   detailed_citation_view(ORDERED METADATA LIST FOR A RESULT OBJECT INSTANCE) :
   see metadata viewing notes below 
   
   =item *
   
   summary_view(ORDERED METADATA LIST FOR A RESULT OBJECT INSTANCE) :
   see metadata viewing notes below 
   
   =item *
   
   fielded_format_view(ORDERED METADATA LIST FOR A RESULT OBJECT INSTANCE) :
   see metadata viewing notes below 
   
   =item *
   
   xml_sgml_view(ORDERED METADATA LIST FOR A RESULT OBJECT INSTANCE) :
   see metadata viewing notes below 
   
   =back
   
     _____________________________________________________________________
    | * Metadata viewing notes                                            |
    | Output is a HTML-ified string.                                      |
    | Input arguments are title, author, subject, url, keywords, version, |
    | notes, short abstract, mime, language, creation date,               |
    | last revision date, owner, copyright, hostname, httphost, and       |
    | extra custom metadata to show.                                      |
     ---------------------------------------------------------------------
   
   TEST CONDITIONAL FUNCTIONS
   
   =over 4
   
   =item *
   
   filled(field) : determines whether a given field has been filled
   
   =back
   
   ERROR FUNCTIONS
   
   =over 4
   
   =item *
   
   output_blank_field_error(server reference) : outputs a message saying that
   more fields need to be filled in
   
   =item *
   
   output_date_error(server reference, error message) : outputs
   an error message specific to bad date format.
   
   =back
   
   =cut
Removed from v.1.11  
changed lines
  Added in v.1.120

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