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Diff for /loncom/interface/lonsearchcat.pm between versions 1.10 and 1.97

version 1.10, 2001/03/14 16:57:04 version 1.97, 2001/08/16 02:20:01
Line 1 Line 1
 # The LearningOnline Network  # The LearningOnline Network
 # Search Catalog  # Search Catalog
 #  #
   # YEAR=2001
 # 03/08/2001 Scott Harrison  # 03/08/2001 Scott Harrison
   # Scott Harrison: 03/12/2001, 03/13/2001, 03/14/2001, 03/15/2001, 03/19/2001
   # Scott Harrison: 03/20/2001, 03/21/2001, 03/22/2001, 03/26/2001, 03/27/2001
   # Scott Harrison: 04/02/2001, 08/15/2001
 #  #
   # Functions
   #
   # handler(server reference) : interacts with the Apache server layer
   #                             (for /adm/searchcat URLs)
   # simpletextfield(name,value) : returns HTML formatted string for simple text
   #                               field
   # simplecheckbox(name,value) : returns HTML formatted string for simple
   #                              checkbox
   # searchphrasefield(title,name,value) : returns HTML formatted string for
   #                                       a search expression phrase field
   # dateboxes(name, defaultmonth, defaultday, defaultyear) : returns HTML
   #                                                          formatted string
   #                                                          for a calendar date
   # selectbox(title,name,value,%HASH=options) : returns HTML formatted string for
   #                                             a selection box field
   # advancedsearch(server reference, environment reference) : perform a complex
   #                                  multi-field logical query
   # filled(field) : determines whether a given field has been filled
   # basicsearch(server reference, environment reference) : perform a simple
   #                               single-field logical query
   # output_blank_field_error(server reference) : outputs a message saying that
   #                                              more fields need to be filled in
   # output_results(output mode,
   #                server reference, 
   #                environment reference,
   #                reply list reference) : outputs results from search
   # build_SQL_query(field name, logic) : builds a SQL query string from a
   #                                      logical expression with AND/OR keywords
   # 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
   # build_custommetadata_query(field_name, logic_statement) : builds a perl
   #                regular expression from a logical expression with AND/OR
   #                keywords
   # detailed_citation_view, summary_view, fielded_format_view, xml_sgml_view:
   #   four different ways to view metadata records.  Outputs 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.
   # 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.
   # output_date_error(server reference, error message) : outputs
   #         an error message specific to bad date format.
   # make_persistent() : makes a set of hidden HTML fields to make
   #                     SQL search interface information to be persistent
   
 package Apache::lonsearchcat;  package Apache::lonsearchcat;
   
 use strict;  use strict;
Line 10  use Apache::Constants qw(:common); Line 61  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;
   
   # ---------------------------------------- variables used throughout the module
 my %language;  my %language;
 my $scrout;  my $scrout;
 my %metadatafields;  my %metadatafields;
 my %cprtag;  my %cprtag;
 my %mimetag;  my %mimetag;
   my $closebutton;
   
   # ------ form selection elements that allow for choosing different output views
   # Detailed Citation View ---> sub detailed_citationview
   # 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
   
   # ----------------------------- Handling routine called via Apache and mod_perl
 sub handler {  sub handler {
     my $r = shift;      my $r = shift;
   
Line 37  sub handler { Line 114  sub handler {
     %metadatafields=();      %metadatafields=();
   
     my $hidden='';      my $hidden='';
     $hidden=<<END if $ENV{'form.catalogmode'} eq 'interactive';      if ($ENV{'form.catalogmode'} eq 'interactive') {
    $hidden=<<END;
 <input type='hidden' name='catalogmode' value='interactive'>  <input type='hidden' name='catalogmode' value='interactive'>
 END  END
           $closebutton=<<END;
   <input type="button" name="close" value='CLOSE' onClick="self.close()">
   END
       }
   
 # ------------------------------------------------ First, check out environment  # ------------------------------------------------ First, check out environment
     $metadatafields{'owner'}=$ENV{'user.name'}.'@'.$ENV{'user.domain'};      $metadatafields{'owner'}=$ENV{'user.name'}.'@'.$ENV{'user.domain'};
Line 51  END Line 133  END
     {      {
  my $fh=Apache::File->new($r->dir_config('lonTabDir').'/language.tab');   my $fh=Apache::File->new($r->dir_config('lonTabDir').'/language.tab');
  map {   map {
     $_=~/(\w+)\s+([\w\s\-]+)/;      $_=~/(\w+)\s+([\w\s\-]+)/; chomp;
     $language{$1}=$2;      $language{$1}=$2;
  } <$fh>;   } <$fh>;
     }      }
Line 61  END Line 143  END
     {      {
  my $fh=Apache::File->new($r->dir_config('lonIncludes').'/copyright.tab');   my $fh=Apache::File->new($r->dir_config('lonIncludes').'/copyright.tab');
  map {   map {
     $_=~/(\w+)\s+([\w\s\-]+)/;      $_=~/(\w+)\s+([\w\s\-]+)/; chomp;
     $cprtag{$1}=$2;      $cprtag{$1}=$2;
  } <$fh>;   } <$fh>;
     }      }
Line 71  END Line 153  END
     {      {
  my $fh=Apache::File->new($r->dir_config('lonTabDir').'/filetypes.tab');   my $fh=Apache::File->new($r->dir_config('lonTabDir').'/filetypes.tab');
  map {   map {
     $_=~/(\w+)\s+(\w+)\s+([\w\s\-]+)/;      $_=~/(\w+)\s+(\w+)\s+([\w\s\-]+)/; chomp;
     $mimetag{$1}=".$1 $3";      $mimetag{$1}=".$1 $3";
  } <$fh>;   } <$fh>;
     }      }
   
   # ----------------------------------- 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'});   return &basicsearch($r,\%ENV);
       }
       elsif ($ENV{'form.advancedsubmit'} eq 'SEARCH') {
    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'});
   
     $scrout.=&searchphrasefield('Limit by author','author',      $scrout.=&searchphrasefield('Limit by author','author',
  '');   $ENV{'form.author'});
   
     $scrout.=&searchphrasefield('Limit by subject','subject',      $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',
   # $ENV{'form.version'});
   
     $scrout.=&searchphrasefield('Limit by notes','notes',      $scrout.=&searchphrasefield('Limit by notes','notes',
  '');   $ENV{'form.notes'});
   
     $scrout.=&searchphrasefield('Limit by abstract','abstract',      $scrout.=&searchphrasefield('Limit by abstract','abstract',
  '');   $ENV{'form.abstract'});
   
       $ENV{'form.mime'}='notxxx' unless length($ENV{'form.mime'});
     $scrout.=&selectbox('Limit by MIME type','mime',      $scrout.=&selectbox('Limit by MIME type','mime',
  'notxxx',%mimetag);   $ENV{'form.mime'},%mimetag);
   
       $ENV{'form.language'}='any' unless length($ENV{'form.language'});
   
     $scrout.=&selectbox('Limit by language','language',      $scrout.=&selectbox('Limit by language','language',
  'any',%language);   $ENV{'form.language'},%language);
           
   
 # ------------------------------------------------ Compute date selection boxes  # ------------------------------------------------ Compute date selection boxes
Line 111  END Line 210  END
 <br>  <br>
 between:  between:
 CREATIONDATESTART  CREATIONDATESTART
     $scrout.=&dateboxes('creationdatestart',1,1,1976);      $scrout.=&dateboxes('creationdatestart',1,1,1976,
    $ENV{'form.creationdatestart_month'},
    $ENV{'form.creationdatestart_day'},
    $ENV{'form.creationdatestart_year'},
    );
     $scrout.=<<CREATIONDATEEND;      $scrout.=<<CREATIONDATEEND;
 and:  and:
 CREATIONDATEEND  CREATIONDATEEND
     $scrout.=&dateboxes('creationdateend',12,31,2051);      $scrout.=&dateboxes('creationdateend',12,31,2051,
    $ENV{'form.creationdateend_month'},
    $ENV{'form.creationdateend_day'},
    $ENV{'form.creationdateend_year'},
    );
     $scrout.="</p>";      $scrout.="</p>";
   
     $scrout.=<<LASTREVISIONDATESTART;      $scrout.=<<LASTREVISIONDATESTART;
Line 124  CREATIONDATEEND Line 231  CREATIONDATEEND
 </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_day'},
    $ENV{'form.lastrevisiondatestart_year'},
    );
     $scrout.=<<LASTREVISIONDATEEND;      $scrout.=<<LASTREVISIONDATEEND;
 and:  and:
 LASTREVISIONDATEEND  LASTREVISIONDATEEND
     $scrout.=&dateboxes('lastrevisiondateend',12,31,2051);      $scrout.=&dateboxes('lastrevisiondateend',12,31,2051,
    $ENV{'form.lastrevisiondateend_month'},
    $ENV{'form.lastrevisiondateend_day'},
    $ENV{'form.lastrevisiondateend_year'},
    );
     $scrout.='</p>';      $scrout.='</p>';
   
     $scrout.=&searchphrasefield('Limit by publisher/owner','owner',      $scrout.=&searchphrasefield('Limit by publisher/owner','owner',
  $metadatafields{'owner'});   $ENV{'form.owner'});
   # $metadatafields{'owner'});
   
       $ENV{'form.copyright'}='any' unless length($ENV{'form.copyright'});
     $scrout.=&selectbox('Limit by copyright/distribution','copyright',      $scrout.=&selectbox('Limit by copyright/distribution','copyright',
  'any',%cprtag);   $ENV{'form.copyright'},%cprtag);
   
   # ------------------------------------------- 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.<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);
Line 156  such as AND or OR then press SEARCH belo Line 297  such as AND or OR then press SEARCH belo
 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>
 <input type="text" name="basicexp">  ENDDOCUMENT
 <input type="checkbox" name="titleonly">      $r->print(&simpletextfield('basicexp',$ENV{'form.basicexp'}));
 <font color="#800000">Title only</font>      $r->print(' ');
       $r->print(&simplecheckbox('titleonly',$ENV{'form.titleonly'}));
       $r->print('<font color="#800000">Title only</font> ');
   #    $r->print(&simplecheckbox('allversions',$ENV{'form.allversions'}));
   # <font color="#800000">Search historic archives</font>
       $r->print(<<ENDDOCUMENT);
 <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' />
 <input type="button" name="close" value="CLOSE" onClick="self.close()">  $closebutton
   $basicviewselect
 </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
 </p>  </p>
 </form>  </form>
 </body>  </body>
Line 181  ENDDOCUMENT Line 329  ENDDOCUMENT
   
 # --------------------------------------------------------- Various form fields  # --------------------------------------------------------- Various form fields
   
 sub textfield {  sub simpletextfield {
     my ($title,$name,$value)=@_;      my ($name,$value)=@_;
     return "\n<p><b>$title:</b><br>".      return '<input type=text name=\''.$name.
            '<input type=text name="'.$name.'" size=80 value="'.$value.'">';     '\' size=20 value=\''.$value.'\' />';
   }
   
   sub simplecheckbox {
       my ($name,$value)=@_;
       my $checked='';
       $checked="CHECKED" if $value eq 'on';
       return '<input type=checkbox name=\''.$name.'\' '. $checked . '>';
 }  }
   
 sub searchphrasefield {  sub searchphrasefield {
Line 196  END Line 351  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,
     return<<END;   $currentmonth,$currentday,$currentyear)=@_;
       ($defaultmonth,$defaultday,$defaultyear)=('','','');
       my $month=<<END;
 <select name="${name}_month">  <select name="${name}_month">
 <option value="$defaultmonth"> </option>  <option value='$defaultmonth'> </option>
 <option value="01">January</option>  <option value="1">January</option>
 <option value="02">February</option>  <option value="2">February</option>
 <option value="03">March</option>  <option value="3">March</option>
 <option value="04">April</option>  <option value="4">April</option>
 <option value="05">May</option>  <option value="5">May</option>
 <option value="06">June</option>  <option value="6">June</option>
 <option value="07">July</option>  <option value="7">July</option>
 <option value="08">August</option>  <option value="8">August</option>
 <option value="09">September</option>  <option value="9">September</option>
 <option value="10">October</option>  <option value="10">October</option>
 <option value="11">November</option>  <option value="11">November</option>
 <option value="12">December</option>  <option value="12">December</option>
 </select>  </select>
   END
       $month=~s/(\"$currentmonth\")/$1 SELECTED/ if length($currentmonth);
       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="1">1</option>
 <option value=2>2</option>  <option value="2">2</option>
 <option value=3>3</option>  <option value="3">3</option>
 <option value=4>4</option>  <option value="4">4</option>
 <option value=5>5</option>  <option value="5">5</option>
 <option value=6>6</option>  <option value="6">6</option>
 <option value=7>7</option>  <option value="7">7</option>
 <option value=8>8</option>  <option value="8">8</option>
 <option value=9>9</option>  <option value="9">9</option>
 <option value=10>10</option>  <option value="10">10</option>
 <option value=11>11</option>  <option value="11">11</option>
 <option value=12>12</option>  <option value="12">12</option>
 <option value=13>13</option>  <option value="13">13</option>
 <option value=14>14</option>  <option value="14">14</option>
 <option value=15>15</option>  <option value="15">15</option>
 <option value=16>16</option>  <option value="16">16</option>
 <option value=17>17</option>  <option value="17">17</option>
 <option value=18>18</option>  <option value="18">18</option>
 <option value=19>19</option>  <option value="19">19</option>
 <option value=20>20</option>  <option value="20">20</option>
 <option value=21>21</option>  <option value="21">21</option>
 <option value=22>22</option>  <option value="22">22</option>
 <option value=23>23</option>  <option value="23">23</option>
 <option value=24>24</option>  <option value="24">24</option>
 <option value=25>25</option>  <option value="25">25</option>
 <option value=26>26</option>  <option value="26">26</option>
 <option value=27>27</option>  <option value="27">27</option>
 <option value=28>28</option>  <option value="28">28</option>
 <option value=29>29</option>  <option value="29">29</option>
 <option value=30>30</option>  <option value="30">30</option>
 <option value=31>31</option>  <option value="31">31</option>
 </select>  </select>
   END
       $day=~s/(\"$currentday\")/$1 SELECTED/ if length($currentday);
       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="1976">1976</option>
 <option value=1977>1977</option>  <option value="1977">1977</option>
 <option value=1978>1978</option>  <option value="1978">1978</option>
 <option value=1979>1979</option>  <option value="1979">1979</option>
 <option value=1980>1980</option>  <option value="1980">1980</option>
 <option value=1981>1981</option>  <option value="1981">1981</option>
 <option value=1982>1982</option>  <option value="1982">1982</option>
 <option value=1983>1983</option>  <option value="1983">1983</option>
 <option value=1984>1984</option>  <option value="1984">1984</option>
 <option value=1985>1985</option>  <option value="1985">1985</option>
 <option value=1986>1986</option>  <option value="1986">1986</option>
 <option value=1987>1987</option>  <option value="1987">1987</option>
 <option value=1988>1988</option>  <option value="1988">1988</option>
 <option value=1989>1989</option>  <option value="1989">1989</option>
 <option value=1990>1990</option>  <option value="1990">1990</option>
 <option value=1991>1991</option>  <option value="1991">1991</option>
 <option value=1992>1992</option>  <option value="1992">1992</option>
 <option value=1993>1993</option>  <option value="1993">1993</option>
 <option value=1994>1994</option>  <option value="1994">1994</option>
 <option value=1995>1995</option>  <option value="1995">1995</option>
 <option value=1996>1996</option>  <option value="1996">1996</option>
 <option value=1997>1997</option>  <option value="1997">1997</option>
 <option value=1998>1998</option>  <option value="1998">1998</option>
 <option value=1999>1999</option>  <option value="1999">1999</option>
 <option value=2000>2000</option>  <option value="2000">2000</option>
 <option value=2001>2001</option>  <option value="2001">2001</option>
 <option value=2002>2002</option>  <option value="2002">2002</option>
 <option value=2003>2003</option>  <option value="2003">2003</option>
 <option value=2004>2004</option>  <option value="2004">2004</option>
 <option value=2005>2005</option>  <option value="2005">2005</option>
 <option value=2006>2006</option>  <option value="2006">2006</option>
 <option value=2007>2007</option>  <option value="2007">2007</option>
 <option value=2008>2008</option>  <option value="2008">2008</option>
 <option value=2009>2009</option>  <option value="2009">2009</option>
 <option value=2010>2010</option>  <option value="2010">2010</option>
 <option value=2011>2011</option>  <option value="2011">2011</option>
 <option value=2012>2012</option>  <option value="2012">2012</option>
 <option value=2013>2013</option>  <option value="2013">2013</option>
 <option value=2014>2014</option>  <option value="2014">2014</option>
 <option value=2015>2015</option>  <option value="2015">2015</option>
 <option value=2016>2016</option>  <option value="2016">2016</option>
 <option value=2017>2017</option>  <option value="2017">2017</option>
 <option value=2018>2018</option>  <option value="2018">2018</option>
 <option value=2019>2019</option>  <option value="2019">2019</option>
 <option value=2020>2020</option>  <option value="2020">2020</option>
 <option value=2021>2021</option>  <option value="2021">2021</option>
 <option value=2022>2022</option>  <option value="2022">2022</option>
 <option value=2023>2023</option>  <option value="2023">2023</option>
 <option value=2024>2024</option>  <option value="2024">2024</option>
 <option value=2025>2025</option>  <option value="2025">2025</option>
 <option value=2026>2026</option>  <option value="2026">2026</option>
 <option value=2027>2027</option>  <option value="2027">2027</option>
 <option value=2028>2028</option>  <option value="2028">2028</option>
 <option value=2029>2029</option>  <option value="2029">2029</option>
 <option value=2030>2030</option>  <option value="2030">2030</option>
 <option value=2031>2031</option>  <option value="2031">2031</option>
 <option value=2032>2032</option>  <option value="2032">2032</option>
 <option value=2033>2033</option>  <option value="2033">2033</option>
 <option value=2034>2034</option>  <option value="2034">2034</option>
 <option value=2035>2035</option>  <option value="2035">2035</option>
 <option value=2036>2036</option>  <option value="2036">2036</option>
 <option value=2037>2037</option>  <option value="2037">2037</option>
 <option value=2038>2038</option>  <option value="2038">2038</option>
 <option value=2039>2039</option>  <option value="2039">2039</option>
 <option value=2040>2040</option>  <option value="2040">2040</option>
 <option value=2041>2041</option>  <option value="2041">2041</option>
 <option value=2042>2042</option>  <option value="2042">2042</option>
 <option value=2043>2043</option>  <option value="2043">2043</option>
 <option value=2044>2044</option>  <option value="2044">2044</option>
 <option value=2045>2045</option>  <option value="2045">2045</option>
 <option value=2046>2046</option>  <option value="2046">2046</option>
 <option value=2047>2047</option>  <option value="2047">2047</option>
 <option value=2048>2048</option>  <option value="2048">2048</option>
 <option value=2049>2049</option>  <option value="2049">2049</option>
 <option value=2050>2050</option>  <option value="2050">2050</option>
 <option value=2051>2051</option>  <option value="2051">2051</option>
 </select>  </select>
 END  END
       $year=~s/(\"$currentyear\")/$1 SELECTED/ if length($currentyear);
       return "$month$day$year";
 }  }
   
 sub selectbox {  sub selectbox {
Line 339  sub selectbox { Line 504  sub selectbox {
     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 {      map {
         $selout.='<option value="'.$_.'"';          $selout.='<option value=\''.$_.'\'';
         if ($_ eq $value) { $selout.=' selected'; }          if ($_ eq $value) { $selout.=' selected'; }
         $selout.='>'.$options{$_}.'</option>';          $selout.='>'.$options{$_}.'</option>';
     } sort keys %options;      } sort keys %options;
     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;
       }
   
       # 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.';
   }
   
   # ---------------------------------------------------- see if a field is filled
   sub filled {
       my ($field)=@_;
       if ($field=~/\S/ && $field ne 'any') {
    return 1;
       }
       else {
    return 0;
       }
   }
   
 # --------------------------------------------------- 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;  
   
     my $replyfile='';  
     $reply=~/^([\.\w]+)$/; # must do since 'use strict' checks for tainting  
     $replyfile=$r->dir_config('lonDaemons').'/tmp/'.$1;  
     $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'};
   
       $query=&build_SQL_query('concat('.$concatarg.')',$ENV{'form.'.'basicexp'});
   
   
       # Get reply (either a hash reference to filehandles or bad connection)
       my $reply=&Apache::lonnet::metadata_query('select * from metadata where '.$query);
   
       # Output search results
       &output_results('Basic',$r,$envhash,$query,$reply);
   
     foreach my $result (@results) {      return OK;
  my ($title,$author,$subject,$url,$keywords,$version,  }
     $notes,$abstract,$mime,$lang,  
     $creationdate,$lastrevisiondate,$owner,$copyright  # ---------------- Message to output when there are not enough fields filled in
     )=map {&Apache::lonnet::unescape($_)} (split(/\,/,$result));  sub output_blank_field_error {
  my $shortabstract=$abstract;      my ($r)=@_;
  $shortabstract=substr($abstract,0,200) if length($abstract)>200;      # make query information persistent to allow for subsequent revision
  $compiledresult.=<<END;      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>  <p>
 END  Incorrect search query due to blank entry fields.
  $compiledresult.=<<END if $ENV{'form.catalogmode'} eq 'interactive';  You need to fill in the relevant
 <font size='-1'><INPUT TYPE="button" NAME="returnvalues" VALUE="SELECT"  fields on the search page in order for a query to be
 onClick="javascript:select_data('$title','$url')">  processed.
 </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>  </p>
 END  </body>
   </html>
   RESULTS
 }  }
   
     unless ($compiledresult) {  # ----------------------------- format and output results based on a reply list
  $compiledresult="There were no results that matched your query";  sub output_results {
     }      my ($mode,$r,$envhash,$query,$replyref)=@_;
       my %ENV=%{$envhash};
       my %rhash=%{$replyref};
       my $compiledresult='';
       my $timeremain=30;
       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';          $r->print(<<SCRIPT) if $ENV{'form.catalogmode'} eq 'interactive';
 <script>  <script>
     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 451  BEGINNING Line 745  BEGINNING
     }      }
 </script>  </script>
 SCRIPT  SCRIPT
     $r->print(<<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>
   CATALOGBEGIN
           $r->print(<<RESULTS);
 <form method="post" action="/adm/searchcat">  <form method="post" action="/adm/searchcat">
 <input type='button' value='Revise search request'  <input type='button' value='Revise search request'
 onClick='this.form.submit();'>  onClick='this.form.submit();'>
   $closebutton
 $persistent  $persistent
 <hr>  <hr>
 <h3>Search Query</h3>  <h3>Search Query</h3>
   RESULTS
       if ($mode eq 'Basic') {
    $r->print(<<RESULTS);
 <p>  <p>
 <b>Basic search:</b> $expression  <b>Basic search:</b> $ENV{'form.basicexp'}
 </p>  </p>
 <h3>Search Results</h3>  RESULTS
       }
       elsif ($mode eq 'Advanced') {
    $r->print(<<RESULTS);
   <p>
   <b>Advanced search</b>
   $query
   </p>
   RESULTS
       }
       $r->print('<h3>Search Results</h3>');
       $r->rflush();
       $r->print(<<ENDPOP);
   <script>
       popwin=open('','popwin','width=400,height=200');
       popwin.document.writeln('<html><body bgcolor="#FFFFFF">'+
         '<h3>Search Results Progress</h3>'+
         '<form name=popremain>'+
         '<br />Server space <input type=text size=25 name=space value="">'+
         '<br />Status <input type=text size=25 name=status value="">'+
         '<br />Maximum remaining time <input type=text size=25 name=timeout value="30">'+
         '</form>'+
         '</body></html>');
       popwin.document.close();
   </script>
   ENDPOP
       $r->rflush();
   
       my $servernum=(keys %rhash)+0;
       $r->print('<script>popwin.document.popremain.space.value="'.
         $servernum.', 0%, count=0/'.$servernum.'";</script>');
       $r->rflush(); 
       my $servercount=0;
       foreach my $rkey (keys %rhash) {
    $servercount++;
    $tflag=1;
    $compiledresult='';
    my $hostname=$rkey;
    $r->print('<script>popwin.document.popremain.status.value="'.
     $rkey.', trying contact";</script>');
    $r->rflush();
    my $reply=$rhash{$rkey};
    my @results;
   
    my $replyfile='';
   
    if ($reply eq 'con_lost') {
       my $percent=sprintf('%3.0f',($servercount/$servernum*100));
       $r->print('<script>popwin.document.popremain.space.value="'.
         $servernum.', '.$percent.'%, count='.$servercount.
         '/'.$servernum.'";</script>');
    }
    else {
       $reply=~/^([\.\w]+)$/; # must do since 'use strict' checks for tainting
       $replyfile=$r->dir_config('lonDaemons').'/tmp/'.$1;
       $reply=~/(.*?)\_/;
       {
    while (1) {
       if (-e $replyfile && $tflag) {
    $r->print('<script>popwin.document.popremain.status.'.
     'value="'.$rkey.', transmitting";</script>');
    $r->rflush();
    $tflag=0;
        }
       last if -e "$replyfile.end";
       last unless $timeremain;
       sleep 1;
       $timeremain--;
       $r->print('<script>popwin.document.popremain.timeout.value="'.
         $timeremain.'";</script>');
       $r->rflush();
    }
    # 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
       ($r->print('ERROR: file cannot be opened') and return OK);
    @results=<$fh>;
       }
    }
    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;
       }
    }
    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;
       my $shortabstract=$abstract;
       $shortabstract=substr($abstract,0,200) if length($abstract)>200;
       $fields[7]=$shortabstract;
       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;
   <hr align='left' width='200' noshade />
   END
               $compiledresult.=<<END;
   <p>
   END
               $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
               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);
       }
       
           }
   
    if ($compiledresult) {
       $resultflag=1;
    }
   
    $r->print(<<RESULTS);
 $compiledresult  $compiledresult
   RESULTS
           my $percent=sprintf('%3.0f',($servercount/$servernum*100));
    $r->print('<script>popwin.document.popremain.space.value="'.
             $servernum.', '.$percent.'%, count='.$servercount.
     '/'.$servernum.'";</script>');
       }
       unless ($resultflag) {
           $r->print("\nThere were no results that matched your query\n");
       }
       $r->print('<script>popwin.close()</script>'); $r->rflush(); 
       $r->print(<<RESULTS);
 </body>  </body>
 </html>  </html>
 RESULTS  RESULTS
   }
   
     return OK;  # ------------------------------------------------------------- build_SQL_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);
   }
   
   # ------------------------------------------------------ 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> $mimetag{$mime}<br>
   <b>Language:</b> $language{$lang}<br>
   <b>Copyright/Distribution:</b> $cprtag{$copyright}<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 $result=<<END;
   <a href="http://$httphost$url" TARGET='search_preview'>$author</a><br />
   $title<br />
   $owner -- $lastrevisiondate<br />
   $cprtag{$copyright}<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 $result=<<END;
   <b>URL: </b> <A HREF="http://$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> $mimetag{$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> $cprtag{$copyright}<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 $result=<<END;
   <pre>
   &lt;LonCapaResource&gt;
   &lt;url&gt;$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;$mimetag{$mime}&lt;/mimetag&gt;
   &lt;/mimeInfo&gt;
   &lt;languageInfo&gt;
   &lt;language&gt;$lang&lt;/language&gt;
   &lt;languagetag&gt;$language{$lang}&lt;/languagetag&gt;
   &lt;/languageInfo&gt;
   &lt;creationdate&gt;$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{$copyright}&lt;/copyrighttag&gt;
   &lt;/copyrightInfo&gt;
   &lt;repositoryLocation&gt;$hostname&lt;/repositoryLocation&gt;
   &lt;shortabstract&gt;$shortabstract&lt;/shortabstract&gt;
   &lt;/LonCapaResource&gt;
   </pre>
   $extrashow
   END
       return $result;
   }
   
   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 '';
   }
   
   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
   }
   
   sub make_persistent {
       my $persistent='';
       
       map {
    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
           }
       } (keys %ENV);
       return $persistent;
   }
 1;  1;
 __END__  __END__
Removed from v.1.10  
changed lines
  Added in v.1.97

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