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Diff for /loncom/interface/loncommon.pm between versions 1.67 and 1.252

version 1.67, 2002/09/13 20:46:09 version 1.252, 2005/02/25 05:54:01
Line 25 Line 25
 #  #
 # http://www.lon-capa.org/  # http://www.lon-capa.org/
 #  #
 # YEAR=2001  
 # 2/13-12/7 Guy Albertelli  
 # 12/11,12/12,12/17 Scott Harrison  
 # 12/21 Gerd Kortemeyer  
 # 12/21 Scott Harrison  
 # 12/25,12/28 Gerd Kortemeyer  
 # YEAR=2002  
 # 1/4 Gerd Kortemeyer  
 # 6/24,7/2 H. K. Ng  
   
 # Makes a table out of the previous attempts  # Makes a table out of the previous attempts
 # Inputs result_from_symbread, user, domain, course_id  # Inputs result_from_symbread, user, domain, course_id
Line 49  Apache::loncommon - pile of common routi Line 40  Apache::loncommon - pile of common routi
   
 =head1 SYNOPSIS  =head1 SYNOPSIS
   
 Referenced by other mod_perl Apache modules.  Common routines for manipulating connections, student answers,
       domains, common Javascript fragments, etc.
   
 Invocation:  =head1 OVERVIEW
  &Apache::loncommon::SUBROUTINENAME(ARGUMENTS);  
   
 =head1 INTRODUCTION  A collection of commonly used subroutines that don't have a natural
   home anywhere else. This collection helps remove
 Common collection of used subroutines.  This collection helps remove  
 redundancy from other modules and increase efficiency of memory usage.  redundancy from other modules and increase efficiency of memory usage.
   
 Current things done:  
   
  Makes a table out of the previous homework attempts  
  Inputs result_from_symbread, user, domain, course_id  
  Reads in non-network-related .tab files  
   
 This is part of the LearningOnline Network with CAPA project  
 described at http://www.lon-capa.org.  
   
 =head2 General Subroutines  
   
 =over 4  
   
 =cut   =cut 
   
 # End of POD header  # End of POD header
Line 81  use strict; Line 58  use strict;
 use Apache::lonnet();  use Apache::lonnet();
 use GDBM_File;  use GDBM_File;
 use POSIX qw(strftime mktime);  use POSIX qw(strftime mktime);
 use Apache::Constants qw(:common);  use Apache::Constants qw(:common :http :methods);
 use Apache::lonmsg();  use Apache::lonmenu();
 my $readit;  use Apache::lonlocal;
   use HTML::Entities;
   
 =pod   my $readit;
   
 =item Global Variables  
   
 =over 4  ##
   ## Global Variables
   ##
   
 =cut  
 # ----------------------------------------------- Filetypes/Languages/Copyright  # ----------------------------------------------- Filetypes/Languages/Copyright
 my %language;  my %language;
   my %supported_language;
 my %cprtag;  my %cprtag;
   my %scprtag;
 my %fe; my %fd;  my %fe; my %fd;
 my %category_extensions;  my %category_extensions;
   
Line 103  my %category_extensions; Line 82  my %category_extensions;
 my %designhash;  my %designhash;
   
 # ---------------------------------------------- Thesaurus variables  # ---------------------------------------------- Thesaurus variables
   #
 =pod  # %Keywords:
   #      A hash used by &keyword to determine if a word is considered a keyword.
 =item %Keywords    # $thesaurus_db_file 
   #      Scalar containing the full path to the thesaurus database.
 A hash used by &keyword to determine if a word is considered a keyword.  
   
 =item $thesaurus_db_file  
   
 Scalar containing the full path to the thesaurus database.                   
   
 =cut  
   
 my %Keywords;  my %Keywords;
 my $thesaurus_db_file;  my $thesaurus_db_file;
   
   #
 =pod  # Initialize values from language.tab, copyright.tab, filetypes.tab,
   # thesaurus.tab, and filecategories.tab.
 =back  #
   
 =cut  
   
 # ----------------------------------------------------------------------- BEGIN  
   
 =pod  
   
 =item BEGIN()   
   
 Initialize values from language.tab, copyright.tab, filetypes.tab,  
 thesaurus.tab, and filecategories.tab.  
   
 =cut  
   
 # ----------------------------------------------------------------------- BEGIN  
   
 BEGIN {  BEGIN {
     # Variable initialization      # Variable initialization
     $thesaurus_db_file = $Apache::lonnet::perlvar{'lonTabDir'}."/thesaurus.db";      $thesaurus_db_file = $Apache::lonnet::perlvar{'lonTabDir'}."/thesaurus.db";
Line 146  BEGIN { Line 102  BEGIN {
     unless ($readit) {      unless ($readit) {
 # ------------------------------------------------------------------- languages  # ------------------------------------------------------------------- languages
     {      {
  my $fh=Apache::File->new($Apache::lonnet::perlvar{'lonTabDir'}.          my $langtabfile = $Apache::lonnet::perlvar{'lonTabDir'}.
  '/language.tab');                                     '/language.tab';
  if ($fh) {          if ( open(my $fh,"<$langtabfile") ) {
     while (<$fh>) {              while (<$fh>) {
  next if /^\#/;                  next if /^\#/;
  chomp;                  chomp;
  my ($key,$val)=(split(/\s+/,$_,2));                  my ($key,$two,$country,$three,$enc,$val,$sup)=(split(/\t/,$_));
  $language{$key}=$val;                  $language{$key}=$val.' - '.$enc;
     }                  if ($sup) {
  }                      $supported_language{$key}=$sup;
                   }
               }
               close($fh);
           }
     }      }
 # ------------------------------------------------------------------ copyrights  # ------------------------------------------------------------------ copyrights
     {      {
  my $fh=Apache::File->new($Apache::lonnet::perlvar{'lonIncludes'}.          my $copyrightfile = $Apache::lonnet::perlvar{'lonIncludes'}.
   '/copyright.tab');                                    '/copyright.tab';
  if ($fh) {          if ( open (my $fh,"<$copyrightfile") ) {
     while (<$fh>) {              while (<$fh>) {
  next if /^\#/;                  next if /^\#/;
  chomp;                  chomp;
  my ($key,$val)=(split(/\s+/,$_,2));                  my ($key,$val)=(split(/\s+/,$_,2));
  $cprtag{$key}=$val;                  $cprtag{$key}=$val;
     }              }
  }              close($fh);
           }
       }
   # ------------------------------------------------------------------ source copyrights
       {
           my $sourcecopyrightfile = $Apache::lonnet::perlvar{'lonIncludes'}.
                                     '/source_copyright.tab';
           if ( open (my $fh,"<$sourcecopyrightfile") ) {
               while (<$fh>) {
                   next if /^\#/;
                   chomp;
                   my ($key,$val)=(split(/\s+/,$_,2));
                   $scprtag{$key}=$val;
               }
               close($fh);
           }
     }      }
   
 # -------------------------------------------------------------- domain designs  # -------------------------------------------------------------- domain designs
Line 179  BEGIN { Line 154  BEGIN {
     while ($filename=readdir(DIR)) {      while ($filename=readdir(DIR)) {
  my ($domain)=($filename=~/^(\w+)\./);   my ($domain)=($filename=~/^(\w+)\./);
     {      {
  my $fh=Apache::File->new($designdir.'/'.$filename);          my $designfile = $designdir.'/'.$filename;
  if ($fh) {          if ( open (my $fh,"<$designfile") ) {
     while (<$fh>) {              while (<$fh>) {
  next if /^\#/;                  next if /^\#/;
  chomp;                  chomp;
  my ($key,$val)=(split(/\=/,$_));                  my ($key,$val)=(split(/\=/,$_));
  if ($val) { $designhash{$domain.'.'.$key}=$val; }                  if ($val) { $designhash{$domain.'.'.$key}=$val; }
     }              }
  }              close($fh);
           }
     }      }
   
     }      }
Line 196  BEGIN { Line 172  BEGIN {
   
 # ------------------------------------------------------------- file categories  # ------------------------------------------------------------- file categories
     {      {
  my $fh=Apache::File->new($Apache::lonnet::perlvar{'lonTabDir'}.          my $categoryfile = $Apache::lonnet::perlvar{'lonTabDir'}.
   '/filecategories.tab');                                    '/filecategories.tab';
  if ($fh) {          if ( open (my $fh,"<$categoryfile") ) {
     while (<$fh>) {              while (<$fh>) {
  next if /^\#/;                  next if /^\#/;
  chomp;                  chomp;
  my ($extension,$category)=(split(/\s+/,$_,2));                  my ($extension,$category)=(split(/\s+/,$_,2));
  push @{$category_extensions{lc($category)}},$extension;                  push @{$category_extensions{lc($category)}},$extension;
     }              }
  }              close($fh);
           }
   
     }      }
 # ------------------------------------------------------------------ file types  # ------------------------------------------------------------------ file types
     {      {
  my $fh=Apache::File->new($Apache::lonnet::perlvar{'lonTabDir'}.          my $typesfile = $Apache::lonnet::perlvar{'lonTabDir'}.
        '/filetypes.tab');                 '/filetypes.tab';
  if ($fh) {          if ( open (my $fh,"<$typesfile") ) {
             while (<$fh>) {              while (<$fh>) {
  next if (/^\#/);                  next if (/^\#/);
  chomp;                  chomp;
  my ($ending,$emb,$descr)=split(/\s+/,$_,3);                  my ($ending,$emb,$descr)=split(/\s+/,$_,3);
  if ($descr ne '') {                   if ($descr ne '') {
     $fe{$ending}=lc($emb);                      $fe{$ending}=lc($emb);
     $fd{$ending}=$descr;                      $fd{$ending}=$descr;
  }                  }
     }              }
  }              close($fh);
           }
     }      }
     &Apache::lonnet::logthis(      &Apache::lonnet::logthis(
               "<font color=yellow>INFO: Read file types</font>");                "<font color=yellow>INFO: Read file types</font>");
Line 229  BEGIN { Line 208  BEGIN {
     }  # end of unless($readit)       }  # end of unless($readit) 
           
 }  }
 # ============================================================= END BEGIN BLOCK  
 ###############################################################  ###############################################################
 ##           HTML and Javascript Helper Functions            ##  ##           HTML and Javascript Helper Functions            ##
 ###############################################################  ###############################################################
   
 =pod   =pod 
   
 =item browser_and_searcher_javascript   =head1 HTML and Javascript Functions
   
 Returns scalar containing javascript to open a browser window  
 or a searcher window.  Also creates   
   
 =over 4  =over 4
   
 =item openbrowser(formname,elementname,only,omit) [javascript]  =item * browser_and_searcher_javascript ()
   
   X<browsing, javascript>X<searching, javascript>Returns a string
   containing javascript with two functions, C<openbrowser> and
   C<opensearcher>. Returned string does not contain E<lt>scriptE<gt>
   tags.
   
   =item * openbrowser(formname,elementname,only,omit) [javascript]
   
 inputs: formname, elementname, only, omit  inputs: formname, elementname, only, omit
   
Line 251  formname and elementname indicate the na Line 234  formname and elementname indicate the na
 the element that the results of the browsing selection are to be placed in.   the element that the results of the browsing selection are to be placed in. 
   
 Specifying 'only' will restrict the browser to displaying only files  Specifying 'only' will restrict the browser to displaying only files
 with the given extension.  Can be a comma seperated list.  with the given extension.  Can be a comma separated list.
   
 Specifying 'omit' will restrict the browser to NOT displaying files  Specifying 'omit' will restrict the browser to NOT displaying files
 with the given extension.  Can be a comma seperated list.  with the given extension.  Can be a comma separated list.
   
 =item opensearcher(formname, elementname) [javascript]  =item * opensearcher(formname, elementname) [javascript]
   
 Inputs: formname, elementname  Inputs: formname, elementname
   
 formname and elementname specify the name of the html form and the name  formname and elementname specify the name of the html form and the name
 of the element the selection from the search results will be placed in.  of the element the selection from the search results will be placed in.
   
 =back  
   
 =cut  =cut
   
 ###############################################################  
 sub browser_and_searcher_javascript {  sub browser_and_searcher_javascript {
       my ($mode)=@_;
       if (!defined($mode)) { $mode='edit'; }
       my $resurl=&lastresurl();
     return <<END;      return <<END;
   // <!-- BEGIN LON-CAPA Internal
     var editbrowser = null;      var editbrowser = null;
     function openbrowser(formname,elementname,only,omit) {      function openbrowser(formname,elementname,only,omit,titleelement) {
         var url = '/res/?';          var url = '$resurl/?';
         if (editbrowser == null) {          if (editbrowser == null) {
             url += 'launch=1&';              url += 'launch=1&';
         }          }
         url += 'catalogmode=interactive&';          url += 'catalogmode=interactive&';
         url += 'mode=edit&';          url += 'mode=$mode&';
         url += 'form=' + formname + '&';          url += 'form=' + formname + '&';
         if (only != null) {          if (only != null) {
             url += 'only=' + only + '&';              url += 'only=' + only + '&';
         }           } else {
               url += 'only=&';
    }
         if (omit != null) {          if (omit != null) {
             url += 'omit=' + omit + '&';              url += 'omit=' + omit + '&';
         }          } else {
               url += 'omit=&';
    }
           if (titleelement != null) {
               url += 'titleelement=' + titleelement + '&';
           } else {
       url += 'titleelement=&';
    }
         url += 'element=' + elementname + '';          url += 'element=' + elementname + '';
         var title = 'Browser';          var title = 'Browser';
         var options = 'scrollbars=1,resizable=1,menubar=0';          var options = 'scrollbars=1,resizable=1,menubar=1,location=1';
         options += ',width=700,height=600';          options += ',width=700,height=600';
         editbrowser = open(url,title,options,'1');          editbrowser = open(url,title,options,'1');
         editbrowser.focus();          editbrowser.focus();
     }      }
     var editsearcher;      var editsearcher;
     function opensearcher(formname,elementname) {      function opensearcher(formname,elementname,titleelement) {
         var url = '/adm/searchcat?';          var url = '/adm/searchcat?';
         if (editsearcher == null) {          if (editsearcher == null) {
             url += 'launch=1&';              url += 'launch=1&';
         }          }
         url += 'catalogmode=interactive&';          url += 'catalogmode=interactive&';
         url += 'mode=edit&';          url += 'mode=$mode&';
         url += 'form=' + formname + '&';          url += 'form=' + formname + '&';
           if (titleelement != null) {
               url += 'titleelement=' + titleelement + '&';
           } else {
       url += 'titleelement=&';
    }
         url += 'element=' + elementname + '';          url += 'element=' + elementname + '';
         var title = 'Search';          var title = 'Search';
         var options = 'scrollbars=1,resizable=1,menubar=0';          var options = 'scrollbars=1,resizable=1,menubar=0';
Line 308  sub browser_and_searcher_javascript { Line 306  sub browser_and_searcher_javascript {
         editsearcher = open(url,title,options,'1');          editsearcher = open(url,title,options,'1');
         editsearcher.focus();          editsearcher.focus();
     }      }
   // END LON-CAPA Internal -->
 END  END
 }  }
   
   sub lastresurl {
       if ($ENV{'environment.lastresurl'}) {
    return $ENV{'environment.lastresurl'}
       } else {
    return '/res';
       }
   }
   
   sub storeresurl {
       my $resurl=&Apache::lonnet::clutter(shift);
       unless ($resurl=~/^\/res/) { return 0; }
       $resurl=~s/\/$//;
       &Apache::lonnet::put('environment',{'lastresurl' => $resurl});
       &Apache::lonnet::appenv('environment.lastresurl' => $resurl);
       return 1;
   }
   
 ###############################################################  sub studentbrowser_javascript {
      unless (
               (($ENV{'request.course.id'}) && 
                (&Apache::lonnet::allowed('srm',$ENV{'request.course.id'})))
            || ($ENV{'request.role'}=~/^(au|dc|su)/)
             ) { return ''; }  
      return (<<'ENDSTDBRW');
   <script type="text/javascript" language="Javascript" >
       var stdeditbrowser;
       function openstdbrowser(formname,uname,udom,roleflag) {
           var url = '/adm/pickstudent?';
           var filter;
           eval('filter=document.'+formname+'.'+uname+'.value;');
           if (filter != null) {
              if (filter != '') {
                  url += 'filter='+filter+'&';
      }
           }
           url += 'form=' + formname + '&unameelement='+uname+
                                       '&udomelement='+udom;
    if (roleflag) { url+="&roles=1"; }
           var title = 'Student_Browser';
           var options = 'scrollbars=1,resizable=1,menubar=0';
           options += ',width=700,height=600';
           stdeditbrowser = open(url,title,options,'1');
           stdeditbrowser.focus();
       }
   </script>
   ENDSTDBRW
   }
   
   sub selectstudent_link {
      my ($form,$unameele,$udomele)=@_;
      if ($ENV{'request.course.id'}) {  
          unless (&Apache::lonnet::allowed('srm',$ENV{'request.course.id'})) {
      return '';
          }
          return "<a href='".'javascript:openstdbrowser("'.$form.'","'.$unameele.
           '","'.$udomele.'");'."'>".&mt('Select User')."</a>";
      }
      if ($ENV{'request.role'}=~/^(au|dc|su)/) {
          return "<a href='".'javascript:openstdbrowser("'.$form.'","'.$unameele.
           '","'.$udomele.'",1);'."'>".&mt('Select User')."</a>";
      }
      return '';
   }
   
   sub coursebrowser_javascript {
       my ($domainfilter)=@_;
      return (<<ENDSTDBRW);
   <script type="text/javascript" language="Javascript" >
       var stdeditbrowser;
       function opencrsbrowser(formname,uname,udom,desc,extra_element) {
           var url = '/adm/pickcourse?';
           var filter;
           if (filter != null) {
              if (filter != '') {
                  url += 'filter='+filter+'&';
      }
           }
           var domainfilter='$domainfilter';
           if (domainfilter != null) {
              if (domainfilter != '') {
                  url += 'domainfilter='+domainfilter+'&';
      }
           }
           url += 'form=' + formname + '&cnumelement='+uname+
                               '&cdomelement='+udom+
                                       '&cnameelement='+desc;
           if (extra_element !=null && extra_element != '' && formname == 'rolechoice') {
               url += '&roleelement='+extra_element;
               if (domainfilter == null || domainfilter == '') {
                   url += '&domainfilter='+extra_element;
               }
           }
           var title = 'Course_Browser';
           var options = 'scrollbars=1,resizable=1,menubar=0';
           options += ',width=700,height=600';
           stdeditbrowser = open(url,title,options,'1');
           stdeditbrowser.focus();
       }
   </script>
   ENDSTDBRW
   }
   
   sub selectcourse_link {
      my ($form,$unameele,$udomele,$desc,$extra_element)=@_;
       return "<a href='".'javascript:opencrsbrowser("'.$form.'","'.$unameele.
           '","'.$udomele.'","'.$desc.'","'.$extra_element.'");'."'>".&mt('Select Course')."</a>";
   }
   
 =pod  =pod
   
 =item linked_select_forms(...)  =item * linked_select_forms(...)
   
 linked_select_forms returns a string containing a <script></script> block  linked_select_forms returns a string containing a <script></script> block
 and html for two <select> menus.  The select menus will be linked in that  and html for two <select> menus.  The select menus will be linked in that
Line 329  linked_select_forms takes the following Line 432  linked_select_forms takes the following
   
 =over 4  =over 4
   
 =item $formname, the name of the <form> tag  =item * $formname, the name of the <form> tag
   
 =item $middletext, the text which appears between the <select> tags  =item * $middletext, the text which appears between the <select> tags
   
 =item $firstdefault, the default value for the first menu  =item * $firstdefault, the default value for the first menu
   
 =item $firstselectname, the name of the first <select> tag  =item * $firstselectname, the name of the first <select> tag
   
 =item $secondselectname, the name of the second <select> tag  =item * $secondselectname, the name of the second <select> tag
   
 =item $hashref, a reference to a hash containing the data for the menus.  =item * $hashref, a reference to a hash containing the data for the menus.
   
 =back   =back 
   
Line 350  first menu value is given in $menu{$choi Line 453  first menu value is given in $menu{$choi
 and text for the second menu are given in the hash pointed to by   and text for the second menu are given in the hash pointed to by 
 $menu{$choice1}->{'select2'}.    $menu{$choice1}->{'select2'}.  
   
 my %menu = ( A1 => { text =>"Choice A1" ,   my %menu = ( A1 => { text =>"Choice A1" ,
                       default => "B3",                         default => "B3",
                       select2 => {                          select2 => { 
                           B1 => "Choice B1",                             B1 => "Choice B1",
                           B2 => "Choice B2",                             B2 => "Choice B2",
                           B3 => "Choice B3",                             B3 => "Choice B3",
                           B4 => "Choice B4"                             B4 => "Choice B4"
                           }                             }
                   },                     },
               A2 => { text =>"Choice A2" ,                 A2 => { text =>"Choice A2" ,
                       default => "C2",                         default => "C2",
                       select2 => {                          select2 => { 
                           C1 => "Choice C1",                             C1 => "Choice C1",
                           C2 => "Choice C2",                             C2 => "Choice C2",
                           C3 => "Choice C3"                             C3 => "Choice C3"
                           }                             }
                   },                     },
               A3 => { text =>"Choice A3" ,                 A3 => { text =>"Choice A3" ,
                       default => "D6",                         default => "D6",
                       select2 => {                          select2 => { 
                           D1 => "Choice D1",                             D1 => "Choice D1",
                           D2 => "Choice D2",                             D2 => "Choice D2",
                           D3 => "Choice D3",                             D3 => "Choice D3",
                           D4 => "Choice D4",                             D4 => "Choice D4",
                           D5 => "Choice D5",                             D5 => "Choice D5",
                           D6 => "Choice D6",                             D6 => "Choice D6",
                           D7 => "Choice D7"                             D7 => "Choice D7"
                           }                             }
                   }                     }
               );                 );
   
 =cut  =cut
   
 # ------------------------------------------------  
   
 sub linked_select_forms {  sub linked_select_forms {
     my ($formname,      my ($formname,
         $middletext,          $middletext,
Line 397  sub linked_select_forms { Line 498  sub linked_select_forms {
     my $first = "document.$formname.$firstselectname";      my $first = "document.$formname.$firstselectname";
     # output the javascript to do the changing      # output the javascript to do the changing
     my $result = '';      my $result = '';
     $result.="<script>\n";      $result.="<script type=\"text/javascript\">\n";
     $result.="var select2data = new Object();\n";      $result.="var select2data = new Object();\n";
     $" = '","';      $" = '","';
     my $debug = '';      my $debug = '';
Line 433  function select1_changed() { Line 534  function select1_changed() {
     // in with the nuclear      // in with the nuclear
     for (i=0;i<values.length; i++) {      for (i=0;i<values.length; i++) {
         $second.options[i] = new Option(values[i]);          $second.options[i] = new Option(values[i]);
           $second.options[i].value = values[i];
         $second.options[i].text = texts[i];          $second.options[i].text = texts[i];
         if (values[i] == select2def) {          if (values[i] == select2def) {
             $second.options[i].selected = true;              $second.options[i].selected = true;
Line 446  END Line 548  END
     foreach my $value (sort(keys(%$hashref))) {      foreach my $value (sort(keys(%$hashref))) {
         $result.="    <option value=\"$value\" ";          $result.="    <option value=\"$value\" ";
         $result.=" selected=\"true\" " if ($value eq $firstdefault);          $result.=" selected=\"true\" " if ($value eq $firstdefault);
         $result.=">$hashref->{$value}->{'text'}</option>\n";          $result.=">".&mt($hashref->{$value}->{'text'})."</option>\n";
     }      }
     $result .= "</select>\n";      $result .= "</select>\n";
     my %select2 = %{$hashref->{$firstdefault}->{'select2'}};      my %select2 = %{$hashref->{$firstdefault}->{'select2'}};
Line 456  END Line 558  END
     foreach my $value (sort(keys(%select2))) {      foreach my $value (sort(keys(%select2))) {
         $result.="    <option value=\"$value\" ";                  $result.="    <option value=\"$value\" ";        
         $result.=" selected=\"true\" " if ($value eq $seconddefault);          $result.=" selected=\"true\" " if ($value eq $seconddefault);
         $result.=">$select2{$value}</option>\n";          $result.=">".&mt($select2{$value})."</option>\n";
     }      }
     $result .= "</select>\n";      $result .= "</select>\n";
     #    return $debug;      #    return $debug;
     return $result;      return $result;
 }   #  end of sub linked_select_forms {  }   #  end of sub linked_select_forms {
   
 ###############################################################  
   
 =pod  =pod
   
 =item help_open_topic($topic, $text, $stayOnPage, $width, $height)  =item * help_open_topic($topic, $text, $stayOnPage, $width, $height)
   
 Returns a string corresponding to an HTML link to the given help $topic, where $topic corresponds to the name of a .tex file in /home/httpd/html/adm/help/tex, with underscores replaced by spaces.  
   
 $text will optionally be linked to the same topic, allowing you to link text in addition to the graphic. If you do not want to link text, but wish to specify one of the later parameters, pass an empty string.  
   
 $stayOnPage is a value that will be interpreted as a boolean. If true, the link will not open a new window. If false, the link will open a new window using Javascript. (Default is false.)  
   
 $width and $height are optional numerical parameters that will override the width and height of the popped up window, which may be useful for certain help topics with big pictures included.  Returns a string corresponding to an HTML link to the given help
   $topic, where $topic corresponds to the name of a .tex file in
   /home/httpd/html/adm/help/tex, with underscores replaced by
   spaces. 
   
   $text will optionally be linked to the same topic, allowing you to
   link text in addition to the graphic. If you do not want to link
   text, but wish to specify one of the later parameters, pass an
   empty string. 
   
   $stayOnPage is a value that will be interpreted as a boolean. If true,
   the link will not open a new window. If false, the link will open
   a new window using Javascript. (Default is false.) 
   
   $width and $height are optional numerical parameters that will
   override the width and height of the popped up window, which may
   be useful for certain help topics with big pictures included. 
   
 =cut  =cut
   
Line 483  sub help_open_topic { Line 593  sub help_open_topic {
     my ($topic, $text, $stayOnPage, $width, $height) = @_;      my ($topic, $text, $stayOnPage, $width, $height) = @_;
     $text = "" if (not defined $text);      $text = "" if (not defined $text);
     $stayOnPage = 0 if (not defined $stayOnPage);      $stayOnPage = 0 if (not defined $stayOnPage);
       if ($ENV{'browser.interface'} eq 'textual' ||
    $ENV{'environment.remote'} eq 'off' ) {
    $stayOnPage=1;
       }
     $width = 350 if (not defined $width);      $width = 350 if (not defined $width);
     $height = 400 if (not defined $height);      $height = 400 if (not defined $height);
     my $filename = $topic;      my $filename = $topic;
Line 491  sub help_open_topic { Line 605  sub help_open_topic {
     my $template = "";      my $template = "";
     my $link;      my $link;
   
       $topic=~s/\W/\_/g;
   
     if (!$stayOnPage)      if (!$stayOnPage)
     {      {
  $link = "javascript:void(open('/adm/help/${filename}.hlp', 'Help_for_$topic', 'menubar=0,toolbar=1,scrollbars=1,width=$width,height=$height'))";   $link = "javascript:void(open('/adm/help/${filename}.hlp', 'Help_for_$topic', 'menubar=0,toolbar=1,scrollbars=1,width=$width,height=$height,resizable=yes'))";
     }      }
     else      else
     {      {
Line 503  sub help_open_topic { Line 619  sub help_open_topic {
     # Add the text      # Add the text
     if ($text ne "")      if ($text ne "")
     {      {
  $template .= "<a href=\"$link\">$text</a> ";   $template .= 
     "<table bgcolor='#3333AA' cellspacing='1' cellpadding='1' border='0'><tr>".
     "<td bgcolor='#5555FF'><a href=\"$link\"><font color='#FFFFFF' size='2'>$text</font></a>";
     }      }
   
     # Add the graphic      # Add the graphic
       my $title = &mt('Online Help');
       my $helpicon=&lonhttpdurl("/adm/help/gif/smallHelp.gif");
     $template .= <<"ENDTEMPLATE";      $template .= <<"ENDTEMPLATE";
 <a href="$link"><image src="/adm/help/gif/smallHelp.gif" border="0" alt="(Help: $topic)" /></a>   <a href="$link" title="$title"><img src="$helpicon" border="0" alt="(Help: $topic)" /></a>
 ENDTEMPLATE  ENDTEMPLATE
       if ($text ne '') { $template.='</td></tr></table>' };
       return $template;
   
   }
   
   # This is a quicky function for Latex cheatsheet editing, since it 
   # appears in at least four places
   sub helpLatexCheatsheet {
       my $other = shift;
       my $addOther = '';
       if ($other) {
    $addOther = Apache::loncommon::help_open_topic($other, shift,
          undef, undef, 600) .
      '</td><td>';
       }
       return '<table><tr><td>'.
    $addOther .
    &Apache::loncommon::help_open_topic("Greek_Symbols",'Greek Symbols',
       undef,undef,600)
    .'</td><td>'.
    &Apache::loncommon::help_open_topic("Other_Symbols",'Other Symbols',
       undef,undef,600)
    .'</td></tr></table>';
   }
   
   sub help_open_menu {
       my ($color,$topic,$component_help,$function,$faq,$bug,$stayOnPage,$width,$height,$text) = @_;
       $text = "" if (not defined $text);
       $stayOnPage = 0 if (not defined $stayOnPage);
       if ($ENV{'browser.interface'} eq 'textual' ||
           $ENV{'environment.remote'} eq 'off' ) {
           $stayOnPage=1;
       }
       $width = 620 if (not defined $width);
       $height = 600 if (not defined $height);
       my $link='';
       my $title = &mt('Get help');
       my $origurl = $ENV{'REQUEST_URI'};
       $origurl=~s|^/~|/priv/|;
       my $timestamp = time;
       foreach (\$color,\$function,\$topic,\$component_help,\$faq,\$bug,\$origurl) {
           $$_ = &Apache::lonnet::escape($$_);
       }
   
       if (!$stayOnPage) {
            $link = "javascript:helpMenu('open')";
       } else {
           $link = "javascript:helpMenu('display')";
       }
       my $banner_link = "/adm/helpmenu?page=banner&color=$color&function=$function&topic=$topic&component_help=$component_help&faq=$faq&bug=$bug&origurl=$origurl&stamp=$timestamp&stayonpage=$stayOnPage";
       my $details_link = "/adm/helpmenu?page=body&color=$color&function=$function&topic=$topic&component_help=$component_help&faq=$faq&bug=$bug&origurl=$origurl&stamp=$timestamp";
       my $template;
       if ($text ne "") {
    $template .= 
     "<table bgcolor='#773311' cellspacing='1' cellpadding='1' border='0'><tr>".
     "<td bgcolor='#886622'><a href=\"$link\"><font color='#FFFFFF' size='2'>$text</font></a>";
       }
       my $html=&Apache::lonxml::xmlbegin();
       my $helpicon=&lonhttpdurl("/adm/lonIcons/helpgateway.gif");
       $template .= <<"ENDTEMPLATE";
    <script type="text/javascript">
   //<!-- BEGIN LON-CAPA Internal
   function helpMenu(target) {
       var caller = this;
       if (target == 'open') {
           var newWindow = null;
           try {
               newWindow =  window.open("/adm/rat/empty.html","helpmenu","HEIGHT=$height,WIDTH=$width,resizable=yes,scrollbars=yes" )
           }
           catch(error) {
               writeHelp(caller);
               return;
           }
           if (newWindow) {
               caller = newWindow;
           }
       }
       writeHelp(caller);
       return;
   }
   function writeHelp(caller) {
       caller.document.write('$html<head><title>LON-CAPA Help Menu</title><meta http-equiv="pragma" content="no-cache"></head>')
       caller.document.write("<frameset rows='105,*' border='0'><frame name='bannerframe'  src='$banner_link'><frame name='bodyframe' src='$details_link'></frameset>")
       caller.document.write("</html>")
       caller.document.close()
       caller.focus()
   }
   // END LON-CAPA Internal -->
    </script>
    <a href="$link" title="$title"><img src="$helpicon" border="0" alt="(Help Menu)" /></a>
   ENDTEMPLATE
       if ($component_help) {
    if (!$text) {
       $template=&help_open_topic($component_help,undef,$stayOnPage,
          $width,$height).' '.$template;
    } else {
       my $help_text;
       $help_text=&Apache::lonnet::unescape($topic);
       $template='<table><tr><td>'.
    &help_open_topic($component_help,$help_text,$stayOnPage,
    $width,$height).'</td><td>'.$template.
    '</td></tr></table>';
    }
       }
       if ($text ne '') { $template.='</td></tr></table>' };
       return $template;
   }
   
   sub help_open_bug {
       my ($topic, $text, $stayOnPage, $width, $height) = @_;
       unless ($ENV{'user.adv'}) { return ''; }
       unless ($Apache::lonnet::perlvar{'BugzillaHost'}) { return ''; }
       $text = "" if (not defined $text);
       $stayOnPage = 0 if (not defined $stayOnPage);
       if ($ENV{'browser.interface'} eq 'textual' ||
    $ENV{'environment.remote'} eq 'off' ) {
    $stayOnPage=1;
       }
       $width = 600 if (not defined $width);
       $height = 600 if (not defined $height);
   
       $topic=~s/\W+/\+/g;
       my $link='';
       my $template='';
       my $url=$Apache::lonnet::perlvar{'BugzillaHost'}.'enter_bug.cgi?product=LON-CAPA&bug_file_loc='.
    &Apache::lonnet::escape($ENV{'REQUEST_URI'}).'&component='.$topic;
       if (!$stayOnPage)
       {
    $link = "javascript:void(open('$url', 'Bugzilla', 'menubar=0,toolbar=1,scrollbars=1,width=$width,height=$height,resizable=yes'))";
       }
       else
       {
    $link = $url;
       }
       # Add the text
       if ($text ne "")
       {
    $template .= 
     "<table bgcolor='#AA3333' cellspacing='1' cellpadding='1' border='0'><tr>".
     "<td bgcolor='#FF5555'><a href=\"$link\"><font color='#FFFFFF' size='2'>$text</font></a>";
       }
   
       # Add the graphic
       my $title = &mt('Report a Bug');
       my $bugicon=&lonhttpdurl("/adm/lonMisc/smallBug.gif");
       $template .= <<"ENDTEMPLATE";
    <a href="$link" title="$title"><img src="$bugicon" border="0" alt="(Bug: $topic)" /></a>
   ENDTEMPLATE
       if ($text ne '') { $template.='</td></tr></table>' };
     return $template;      return $template;
   
 }  }
   
   sub help_open_faq {
       my ($topic, $text, $stayOnPage, $width, $height) = @_;
       unless ($ENV{'user.adv'}) { return ''; }
       unless ($Apache::lonnet::perlvar{'FAQHost'}) { return ''; }
       $text = "" if (not defined $text);
       $stayOnPage = 0 if (not defined $stayOnPage);
       if ($ENV{'browser.interface'} eq 'textual' ||
    $ENV{'environment.remote'} eq 'off' ) {
    $stayOnPage=1;
       }
       $width = 350 if (not defined $width);
       $height = 400 if (not defined $height);
   
       $topic=~s/\W+/\+/g;
       my $link='';
       my $template='';
       my $url=$Apache::lonnet::perlvar{'FAQHost'}.'/fom/cache/'.$topic.'.html';
       if (!$stayOnPage)
       {
    $link = "javascript:void(open('$url', 'FAQ-O-Matic', 'menubar=0,toolbar=1,scrollbars=1,width=$width,height=$height,resizable=yes'))";
       }
       else
       {
    $link = $url;
       }
   
       # Add the text
       if ($text ne "")
       {
    $template .= 
     "<table bgcolor='#337733' cellspacing='1' cellpadding='1' border='0'><tr>".
     "<td bgcolor='#448844'><a href=\"$link\"><font color='#FFFFFF' size='2'>$text</font></a>";
       }
   
       # Add the graphic
       my $title = &mt('View the FAQ');
       my $faqicon=&lonhttpdurl("/adm/lonMisc/smallFAQ.gif");
       $template .= <<"ENDTEMPLATE";
    <a href="$link" title="$title"><img src="$faqicon" border="0" alt="(FAQ: $topic)" /></a>
   ENDTEMPLATE
       if ($text ne '') { $template.='</td></tr></table>' };
       return $template;
   
   }
   
   ###############################################################
   ###############################################################
   
 =pod  =pod
   
 =item csv_translate($text)   =item * csv_translate($text) 
   
 Translate $text to allow it to be output as a 'comma seperated values'   Translate $text to allow it to be output as a 'comma separated values' 
 format.  format.
   
 =cut  =cut
   
   ###############################################################
   ###############################################################
 sub csv_translate {  sub csv_translate {
     my $text = shift;      my $text = shift;
     $text =~ s/\"/\"\"/g;      $text =~ s/\"/\"\"/g;
     $text =~ s/\n//g;      $text =~ s/\n/ /g;
     return $text;      return $text;
 }  }
   
   
   ###############################################################
   ###############################################################
   
   =pod
   
   =item * define_excel_formats
   
   Define some commonly used Excel cell formats.
   
   Currently supported formats:
   
   =over 4
   
   =item header
   
   =item bold
   
   =item h1
   
   =item h2
   
   =item h3
   
   =item date
   
   =back
   
   Inputs: $workbook
   
   Returns: $format, a hash reference.
   
   =cut
   
   ###############################################################
   ###############################################################
   sub define_excel_formats {
       my ($workbook) = @_;
       my $format;
       $format->{'header'} = $workbook->add_format(bold      => 1, 
                                                   bottom    => 1,
                                                   align     => 'center');
       $format->{'bold'} = $workbook->add_format(bold=>1);
       $format->{'h1'}   = $workbook->add_format(bold=>1, size=>18);
       $format->{'h2'}   = $workbook->add_format(bold=>1, size=>16);
       $format->{'h3'}   = $workbook->add_format(bold=>1, size=>14);
       $format->{'i'}    = $workbook->add_format(italic=>1);
       $format->{'date'} = $workbook->add_format(num_format=>
                                               'mm/dd/yyyy hh:mm:ss');
       return $format;
   }
   
   ###############################################################
   ###############################################################
   
   =pod
   
   =item * change_content_javascript():
   
   This and the next function allow you to create small sections of an
   otherwise static HTML page that you can update on the fly with
   Javascript, even in Netscape 4.
   
   The Javascript fragment returned by this function (no E<lt>scriptE<gt> tag)
   must be written to the HTML page once. It will prove the Javascript
   function "change(name, content)". Calling the change function with the
   name of the section 
   you want to update, matching the name passed to C<changable_area>, and
   the new content you want to put in there, will put the content into
   that area.
   
   B<Note>: Netscape 4 only reserves enough space for the changable area
   to contain room for the original contents. You need to "make space"
   for whatever changes you wish to make, and be B<sure> to check your
   code in Netscape 4. This feature in Netscape 4 is B<not> powerful;
   it's adequate for updating a one-line status display, but little more.
   This script will set the space to 100% width, so you only need to
   worry about height in Netscape 4.
   
   Modern browsers are much less limiting, and if you can commit to the
   user not using Netscape 4, this feature may be used freely with
   pretty much any HTML.
   
   =cut
   
   sub change_content_javascript {
       # If we're on Netscape 4, we need to use Layer-based code
       if ($ENV{'browser.type'} eq 'netscape' &&
    $ENV{'browser.version'} =~ /^4\./) {
    return (<<NETSCAPE4);
    function change(name, content) {
       doc = document.layers[name+"___escape"].layers[0].document;
       doc.open();
       doc.write(content);
       doc.close();
    }
   NETSCAPE4
       } else {
    # Otherwise, we need to use semi-standards-compliant code
    # (technically, "innerHTML" isn't standard but the equivalent
    # is really scary, and every useful browser supports it
    return (<<DOMBASED);
    function change(name, content) {
       element = document.getElementById(name);
       element.innerHTML = content;
    }
   DOMBASED
       }
   }
   
   =pod
   
   =item * changable_area($name, $origContent):
   
   This provides a "changable area" that can be modified on the fly via
   the Javascript code provided in C<change_content_javascript>. $name is
   the name you will use to reference the area later; do not repeat the
   same name on a given HTML page more then once. $origContent is what
   the area will originally contain, which can be left blank.
   
   =cut
   
   sub changable_area {
       my ($name, $origContent) = @_;
   
       if ($ENV{'browser.type'} eq 'netscape' &&
    $ENV{'browser.version'} =~ /^4\./) {
    # If this is netscape 4, we need to use the Layer tag
    return "<ilayer width='100%' id='${name}___escape' overflow='none'><layer width='100%' id='$name' overflow='none'>$origContent</layer></ilayer>";
       } else {
    return "<span id='$name'>$origContent</span>";
       }
   }
   
   =pod
   
   =back
   
   =cut
   
 ###############################################################  ###############################################################
 ##        Home server <option> list generating code          ##  ##        Home server <option> list generating code          ##
 ###############################################################  ###############################################################
 #-------------------------------------------  
   
 =pod  =pod
   
 =item get_domains()  =head1 Home Server option list generating code
   
   =over 4
   
   =item * get_domains()
   
 Returns an array containing each of the domains listed in the hosts.tab  Returns an array containing each of the domains listed in the hosts.tab
 file.  file.
Line 551  sub get_domains { Line 1012  sub get_domains {
     my @domains;      my @domains;
     my %seen;      my %seen;
     foreach (sort values(%Apache::lonnet::hostdom)) {      foreach (sort values(%Apache::lonnet::hostdom)) {
         push (@domains,$_) unless $seen{$_}++;   push (@domains,$_) unless $seen{$_}++;
     }      }
     return @domains;      return @domains;
 }  }
   
   # ------------------------------------------
   
   sub domain_select {
       my ($name,$value,$multiple)=@_;
       my %domains=map { 
    $_ => $_.' '.$Apache::lonnet::domaindescription{$_} 
       } &get_domains;
       if ($multiple) {
    $domains{''}=&mt('Any domain');
    return &multiple_select_form($name,$value,4,%domains);
       } else {
    return &select_form($name,$value,%domains);
       }
   }
   
   sub multiple_select_form {
       my ($name,$value,$size,%hash)=@_;
       my %selected = map { $_ => 1 } ref($value)?@{$value}:($value);
       my $output='';
       if (! defined($size)) {
           $size = 4;
           if (scalar(keys(%hash))<4) {
               $size = scalar(keys(%hash));
           }
       }
       $output.="\n<select name='$name' size='$size' multiple='1'>";
       foreach (sort(keys(%hash))) {
           $output.='<option value="'.$_.'" ';
           $output.='selected ' if ($selected{$_});
           $output.='>'.$hash{$_}."</option>\n";
       }
       $output.="</select>\n";
       return $output;
   }
   
 #-------------------------------------------  #-------------------------------------------
   
 =pod  =pod
   
 =item select_dom_form($defdom,$name)  =item * select_form($defdom,$name,%hash)
   
   Returns a string containing a <select name='$name' size='1'> form to 
   allow a user to select options from a hash option_name => displayed text.  
   See lonrights.pm for an example invocation and use.
   
   =cut
   
   #-------------------------------------------
   sub select_form {
       my ($def,$name,%hash) = @_;
       my $selectform = "<select name=\"$name\" size=\"1\">\n";
       my @keys;
       if (exists($hash{'select_form_order'})) {
    @keys=@{$hash{'select_form_order'}};
       } else {
    @keys=sort(keys(%hash));
       }
       foreach (@keys) {
           $selectform.="<option value=\"$_\" ".
               ($_ eq $def ? 'selected' : '').
                   ">".&mt($hash{$_})."</option>\n";
       }
       $selectform.="</select>";
       return $selectform;
   }
   
   sub gradeleveldescription {
       my $gradelevel=shift;
       my %gradelevels=(0 => 'Not specified',
        1 => 'Grade 1',
        2 => 'Grade 2',
        3 => 'Grade 3',
        4 => 'Grade 4',
        5 => 'Grade 5',
        6 => 'Grade 6',
        7 => 'Grade 7',
        8 => 'Grade 8',
        9 => 'Grade 9',
        10 => 'Grade 10',
        11 => 'Grade 11',
        12 => 'Grade 12',
        13 => 'Grade 13',
        14 => '100 Level',
        15 => '200 Level',
        16 => '300 Level',
        17 => '400 Level',
        18 => 'Graduate Level');
       return &mt($gradelevels{$gradelevel});
   }
   
   sub select_level_form {
       my ($deflevel,$name)=@_;
       unless ($deflevel) { $deflevel=0; }
       my $selectform = "<select name=\"$name\" size=\"1\">\n";
       for (my $i=0; $i<=18; $i++) {
           $selectform.="<option value=\"$i\" ".
               ($i==$deflevel ? 'selected' : '').
                   ">".&gradeleveldescription($i)."</option>\n";
       }
       $selectform.="</select>";
       return $selectform;
   }
   
   #-------------------------------------------
   
   =pod
   
   =item * select_dom_form($defdom,$name,$includeempty)
   
 Returns a string containing a <select name='$name' size='1'> form to   Returns a string containing a <select name='$name' size='1'> form to 
 allow a user to select the domain to preform an operation in.    allow a user to select the domain to preform an operation in.  
 See loncreateuser.pm for an example invocation and use.  See loncreateuser.pm for an example invocation and use.
   
   If the $includeempty flag is set, it also includes an empty choice ("no domain
   selected");
   
 =cut  =cut
   
 #-------------------------------------------  #-------------------------------------------
 sub select_dom_form {  sub select_dom_form {
     my ($defdom,$name) = @_;      my ($defdom,$name,$includeempty) = @_;
     my @domains = get_domains();      my @domains = get_domains();
       if ($includeempty) { @domains=('',@domains); }
     my $selectdomain = "<select name=\"$name\" size=\"1\">\n";      my $selectdomain = "<select name=\"$name\" size=\"1\">\n";
     foreach (@domains) {      foreach (@domains) {
         $selectdomain.="<option value=\"$_\" ".          $selectdomain.="<option value=\"$_\" ".
             ($_ eq $defdom ? 'selected' : '').              ($_ eq $defdom ? 'selected="selected"' : '').
                 ">$_</option>\n";                  ">$_</option>\n";
     }      }
     $selectdomain.="</select>";      $selectdomain.="</select>";
Line 586  sub select_dom_form { Line 1154  sub select_dom_form {
   
 =pod  =pod
   
 =item get_library_servers($domain)  =item * get_library_servers($domain)
   
 Returns a hash which contains keys like '103l3' and values like   Returns a hash which contains keys like '103l3' and values like 
 'kirk.lite.msu.edu'.  All of the keys will be for machines in the  'kirk.lite.msu.edu'.  All of the keys will be for machines in the
Line 610  sub get_library_servers { Line 1178  sub get_library_servers {
   
 =pod  =pod
   
 =item home_server_option_list($domain)  =item * home_server_option_list($domain)
   
 returns a string which contains an <option> list to be used in a   returns a string which contains an <option> list to be used in a 
 <select> form input.  See loncreateuser.pm for an example.  <select> form input.  See loncreateuser.pm for an example.
Line 628  sub home_server_option_list { Line 1196  sub home_server_option_list {
     }      }
     return $result;      return $result;
 }  }
   
   =pod
   
   =back
   
   =cut
   
   ###############################################################
   ##                  Decoding User Agent                      ##
   ###############################################################
   
   =pod
   
   =head1 Decoding the User Agent
   
   =over 4
   
   =item * &decode_user_agent()
   
   Inputs: $r
   
   Outputs:
   
   =over 4
   
   =item * $httpbrowser
   
   =item * $clientbrowser
   
   =item * $clientversion
   
   =item * $clientmathml
   
   =item * $clientunicode
   
   =item * $clientos
   
   =back
   
   =back 
   
   =cut
   
 ###############################################################  ###############################################################
 ##    End of home server <option> list generating code       ##  
 ###############################################################  ###############################################################
   sub decode_user_agent {
       my ($r)=@_;
       my @browsertype=split(/\&/,$Apache::lonnet::perlvar{"lonBrowsDet"});
       my %mathcap=split(/\&/,$$Apache::lonnet::perlvar{"lonMathML"});
       my $httpbrowser=$ENV{"HTTP_USER_AGENT"};
       if (!$httpbrowser && $r) { $httpbrowser=$r->header_in('User-Agent'); }
       my $clientbrowser='unknown';
       my $clientversion='0';
       my $clientmathml='';
       my $clientunicode='0';
       for (my $i=0;$i<=$#browsertype;$i++) {
           my ($bname,$match,$notmatch,$vreg,$minv,$univ)=split(/\:/,$browsertype[$i]);
    if (($httpbrowser=~/$match/i)  && ($httpbrowser!~/$notmatch/i)) {
       $clientbrowser=$bname;
               $httpbrowser=~/$vreg/i;
       $clientversion=$1;
               $clientmathml=($clientversion>=$minv);
               $clientunicode=($clientversion>=$univ);
    }
       }
       my $clientos='unknown';
       if (($httpbrowser=~/linux/i) ||
           ($httpbrowser=~/unix/i) ||
           ($httpbrowser=~/ux/i) ||
           ($httpbrowser=~/solaris/i)) { $clientos='unix'; }
       if (($httpbrowser=~/vax/i) ||
           ($httpbrowser=~/vms/i)) { $clientos='vms'; }
       if ($httpbrowser=~/next/i) { $clientos='next'; }
       if (($httpbrowser=~/mac/i) ||
           ($httpbrowser=~/powerpc/i)) { $clientos='mac'; }
       if ($httpbrowser=~/win/i) { $clientos='win'; }
       if ($httpbrowser=~/embed/i) { $clientos='pda'; }
       return ($httpbrowser,$clientbrowser,$clientversion,$clientmathml,
               $clientunicode,$clientos,);
   }
   
 ###############################################################  ###############################################################
 ##    Authentication changing form generation subroutines    ##  ##    Authentication changing form generation subroutines    ##
Line 644  sub home_server_option_list { Line 1289  sub home_server_option_list {
   
 =pod  =pod
   
 =item authform_xxxxxx  =head1 Authentication Routines
   
   =over 4
   
   =item * authform_xxxxxx
   
 The authform_xxxxxx subroutines provide javascript and html forms which   The authform_xxxxxx subroutines provide javascript and html forms which 
 handle some of the conveniences required for authentication forms.    handle some of the conveniences required for authentication forms.  
Line 654  See loncreateuser.pm for invocation and Line 1303  See loncreateuser.pm for invocation and
   
 =over 4  =over 4
   
 =item authform_header  =item * authform_header
   
 =item authform_authorwarning  =item * authform_authorwarning
   
 =item authform_nochange  =item * authform_nochange
   
 =item authform_kerberos  =item * authform_kerberos
   
 =item authform_internal  =item * authform_internal
   
 =item authform_filesystem  =item * authform_filesystem
   
 =back  =back
   
   =back 
   
 =cut  =cut
   
 #-------------------------------------------  #-------------------------------------------
 sub authform_header{    sub authform_header{  
     my %in = (      my %in = (
         formname => 'cu',          formname => 'cu',
         kerb_def_dom => 'MSU.EDU',          kerb_def_dom => '',
         @_,          @_,
     );      );
     $in{'formname'} = 'document.' . $in{'formname'};      $in{'formname'} = 'document.' . $in{'formname'};
     my $result='';      my $result='';
   
   #---------------------------------------------- Code for upper case translation
       my $Javascript_toUpperCase;
       unless ($in{kerb_def_dom}) {
           $Javascript_toUpperCase =<<"END";
           switch (choice) {
              case 'krb': currentform.elements[choicearg].value =
                  currentform.elements[choicearg].value.toUpperCase();
                  break;
              default:
           }
   END
       } else {
           $Javascript_toUpperCase = "";
       }
   
       my $radioval = "'nochange'";
       if (exists($in{'curr_authtype'}) &&
           defined($in{'curr_authtype'}) &&
           $in{'curr_authtype'} ne '') {
           $radioval = "'$in{'curr_authtype'}arg'";
       }
       my $argfield = 'null';
       if ( grep/^mode$/,(keys %in) ) {
           if ($in{'mode'} eq 'modifycourse')  {
               if ( grep/^curr_authtype$/,(keys %in) ) {
                   $radioval = "'$in{'curr_authtype'}'";
               }
               if ( grep/^curr_autharg$/,(keys %in) ) {
                   unless ($in{'curr_autharg'} eq '') {
                       $argfield = "'$in{'curr_autharg'}'";
                   }
               }
           }
       }
   
     $result.=<<"END";      $result.=<<"END";
 var current = new Object();  var current = new Object();
 current.radiovalue = 'nochange';  current.radiovalue = $radioval;
 current.argfield = null;  current.argfield = $argfield;
   
 function changed_radio(choice,currentform) {  function changed_radio(choice,currentform) {
     var choicearg = choice + 'arg';      var choicearg = choice + 'arg';
Line 712  function changed_radio(choice,currentfor Line 1399  function changed_radio(choice,currentfor
 function changed_text(choice,currentform) {  function changed_text(choice,currentform) {
     var choicearg = choice + 'arg';      var choicearg = choice + 'arg';
     if (currentform.elements[choicearg].value !='') {      if (currentform.elements[choicearg].value !='') {
         switch (choice) {          $Javascript_toUpperCase
             case 'krb': currentform.elements[choicearg].value =  
                 currentform.elements[choicearg].value.toUpperCase();  
                 break;  
             default:  
         }  
         // clear old field          // clear old field
         if ((current.argfield != choicearg) && (current.argfield != null)) {          if ((current.argfield != choicearg) && (current.argfield != null)) {
             currentform.elements[current.argfield].value = '';              currentform.elements[current.argfield].value = '';
Line 747  END Line 1429  END
   
 sub authform_authorwarning{  sub authform_authorwarning{
     my $result='';      my $result='';
     $result=<<"END";      $result='<i>'.
 <i>As a general rule, only authors or co-authors should be filesystem          &mt('As a general rule, only authors or co-authors should be '.
 authenticated (which allows access to the server filesystem).</i>              'filesystem authenticated '.
 END              '(which allows access to the server filesystem).')."</i>\n";
     return $result;      return $result;
 }  }
   
Line 760  sub authform_nochange{ Line 1442  sub authform_nochange{
               kerb_def_dom => 'MSU.EDU',                kerb_def_dom => 'MSU.EDU',
               @_,                @_,
           );            );
     my $result='';      my $result = &mt('[_1] Do not change login data',
     $result.=<<"END";                       '<input type="radio" name="login" value="nochange" '.
 <input type="radio" name="login" value="nochange" checked="checked"                       'checked="checked" onclick="'.
        onclick="javascript:changed_radio('nochange',$in{'formname'});" />              "javascript:changed_radio('nochange',$in{'formname'});".'" />');
 Do not change login data  
 END  
     return $result;      return $result;
 }  }
   
Line 773  sub authform_kerberos{ Line 1453  sub authform_kerberos{
     my %in = (      my %in = (
               formname => 'document.cu',                formname => 'document.cu',
               kerb_def_dom => 'MSU.EDU',                kerb_def_dom => 'MSU.EDU',
                 kerb_def_auth => 'krb4',
               @_,                @_,
               );                );
     my $result='';      my ($check4,$check5,$krbarg);
     $result.=<<"END";      if ($in{'kerb_def_auth'} eq 'krb5') {
 <input type="radio" name="login" value="krb"          $check5 = " checked=\"on\"";
        onclick="javascript:changed_radio('krb',$in{'formname'});"      } else {
        onchange="javascript:changed_radio('krb',$in{'formname'});" />         $check4 = " checked=\"on\"";
 Kerberos authenticated with domain      }
 <input type="text" size="10" name="krbarg" value=""      $krbarg = $in{'kerb_def_dom'};
        onchange="javascript:changed_text('krb',$in{'formname'});" />  
 <input type="radio" name="krbver" value="4" checked="on" />Version 4      my $krbcheck = "";
 <input type="radio" name="krbver" value="5" />Version 5      if ( grep/^curr_authtype$/,(keys %in) ) {
 END          if ($in{'curr_authtype'} =~ m/^krb/) {
               $krbcheck = " checked=\"on\"";
               if ( grep/^curr_autharg$/,(keys %in) ) {
                   $krbarg = $in{'curr_autharg'};
               }
           }
       }
   
       my $jscall = "javascript:changed_radio('krb',$in{'formname'});";
       my $result .= &mt
           ('[_1] Kerberos authenticated with domain [_2] '.
            '[_3] Version 4 [_4] Version 5',
            '<input type="radio" name="login" value="krb" '.
                'onclick="'.$jscall.'" onchange="'.$jscall.'"'.$krbcheck.' />',
            '<input type="text" size="10" name="krbarg" '.
                'value="'.$krbarg.'" '.
                'onchange="'.$jscall.'" />',
            '<input type="radio" name="krbver" value="4" '.$check4.' />',
            '<input type="radio" name="krbver" value="5" '.$check5.' />');
     return $result;      return $result;
 }  }
   
Line 795  sub authform_internal{ Line 1494  sub authform_internal{
                 kerb_def_dom => 'MSU.EDU',                  kerb_def_dom => 'MSU.EDU',
                 @_,                  @_,
                 );                  );
     my $result='';  
     $result.=<<"END";      my $intcheck = "";
 <input type="radio" name="login" value="int"      my $intarg = 'value=""';
        onchange="javascript:changed_radio('int',$args{'formname'});"      if ( grep/^curr_authtype$/,(keys %args) ) {
        onclick="javascript:changed_radio('int',$args{'formname'});" />          if ($args{'curr_authtype'} eq 'int') {
 Internally authenticated (with initial password               $intcheck = " checked=\"on\"";
 <input type="text" size="10" name="intarg" value=""              if ( grep/^curr_autharg$/,(keys %args) ) {
        onchange="javascript:changed_text('int',$args{'formname'});" />                  $intarg = "value=\"$args{'curr_autharg'}\"";
 END              }
           }
       }
   
       my $jscall = "javascript:changed_radio('int',$args{'formname'});";
       my $result.=&mt
           ('[_1] Internally authenticated (with initial password [_2])',
            '<input type="radio" name="login" value="int" '.$intcheck.
                ' onchange="'.$jscall.'" onclick="'.$jscall.'" />',
            '<input type="text" size="10" name="intarg" '.$intarg.
                ' onchange="'.$jscall.'" />');
     return $result;      return $result;
 }  }
   
Line 813  sub authform_local{ Line 1522  sub authform_local{
               kerb_def_dom => 'MSU.EDU',                kerb_def_dom => 'MSU.EDU',
               @_,                @_,
               );                );
     my $result='';  
     $result.=<<"END";      my $loccheck = "";
 <input type="radio" name="login" value="loc"      my $locarg = 'value=""';
        onchange="javascript:changed_radio('loc',$in{'formname'});"      if ( grep/^curr_authtype$/,(keys %in) ) {
        onclick="javascript:changed_radio('loc',$in{'formname'});" />          if ($in{'curr_authtype'} eq 'loc') {
 Local Authentication with argument              $loccheck = " checked=\"on\"";
 <input type="text" size="10" name="locarg" value=""              if ( grep/^curr_autharg$/,(keys %in) ) {
        onchange="javascript:changed_text('loc',$in{'formname'});" />                  $locarg = "value=\"$in{'curr_autharg'}\"";
 END              }
           }
       }
   
       my $jscall = "javascript:changed_radio('loc',$in{'formname'});";
       my $result.=&mt('[_1] Local Authentication with argument [_2]',
                       '<input type="radio" name="login" value="loc" '.$loccheck.
                           ' onchange="'.$jscall.'" onclick="'.$jscall.'" />',
                       '<input type="text" size="10" name="locarg" '.$locarg.
                           ' onchange="'.$jscall.'" />');
     return $result;      return $result;
 }  }
   
Line 831  sub authform_filesystem{ Line 1549  sub authform_filesystem{
               kerb_def_dom => 'MSU.EDU',                kerb_def_dom => 'MSU.EDU',
               @_,                @_,
               );                );
     my $result='';      my $jscall = "javascript:changed_radio('fsys',$in{'formname'});";
     $result.=<<"END";      my $result.= &mt
 <input type="radio" name="login" value="fsys"           ('[_1] Filesystem Authenticated (with initial password [_2])',
        onchange="javascript:changed_radio('fsys',$in{'formname'});"           '<input type="radio" name="login" value="fsys" '.
        onclick="javascript:changed_radio('fsys',$in{'formname'});" />           'onchange="'.$jscall.'" onclick="'.$jscall.'" />',
 Filesystem authenticated (with initial password            '<input type="text" size="10" name="fsysarg" value="" '.
 <input type="text" size="10" name="fsysarg" value=""                    'onchange="'.$jscall.'" />');
        onchange="javascript:changed_text('fsys',$in{'formname'});">  
 END  
     return $result;      return $result;
 }  }
   
 ###############################################################  ###############################################################
 ##   End Authentication changing form generation functions   ##  ##    Get Authentication Defaults for Domain                 ##
   ###############################################################
   
   =pod
   
   =head1 Domains and Authentication
   
   Returns default authentication type and an associated argument as
   listed in file 'domain.tab'.
   
   =over 4
   
   =item * get_auth_defaults
   
   get_auth_defaults($target_domain) returns the default authentication
   type and an associated argument (initial password or a kerberos domain).
   These values are stored in lonTabs/domain.tab
   
   ($def_auth, $def_arg) = &get_auth_defaults($target_domain);
   
   If target_domain is not found in domain.tab, returns nothing ('').
   
   =cut
   
   #-------------------------------------------
   sub get_auth_defaults {
       my $domain=shift;
       return ($Apache::lonnet::domain_auth_def{$domain},$Apache::lonnet::domain_auth_arg_def{$domain});
   }
   ###############################################################
   ##   End Get Authentication Defaults for Domain              ##
   ###############################################################
   
   ###############################################################
   ##    Get Kerberos Defaults for Domain                 ##
 ###############################################################  ###############################################################
   ##
   ## Returns default kerberos version and an associated argument
   ## as listed in file domain.tab. If not listed, provides
   ## appropriate default domain and kerberos version.
   ##
   #-------------------------------------------
   
   =pod
   
   =item * get_kerberos_defaults
   
   get_kerberos_defaults($target_domain) returns the default kerberos
   version and domain. If not found in domain.tabs, it defaults to
   version 4 and the domain of the server.
   
   ($def_version, $def_krb_domain) = &get_kerberos_defaults($target_domain);
   
   =cut
   
   #-------------------------------------------
   sub get_kerberos_defaults {
       my $domain=shift;
       my ($krbdef,$krbdefdom) =
           &Apache::loncommon::get_auth_defaults($domain);
       unless ($krbdef =~/^krb/ && $krbdefdom) {
           $ENV{'SERVER_NAME'}=~/(\w+\.\w+)$/;
           my $krbdefdom=$1;
           $krbdefdom=~tr/a-z/A-Z/;
           $krbdef = "krb4";
       }
       return ($krbdef,$krbdefdom);
   }
   
   =pod
   
   =back
   
   =cut
   
 ###############################################################  ###############################################################
 ##                Thesaurus Functions                        ##  ##                Thesaurus Functions                        ##
Line 853  END Line 1641  END
   
 =pod  =pod
   
 =item initialize_keywords  =head1 Thesaurus Functions
   
   =over 4
   
   =item * initialize_keywords
   
 Initializes the package variable %Keywords if it is empty.  Uses the  Initializes the package variable %Keywords if it is empty.  Uses the
 package variable $thesaurus_db_file.  package variable $thesaurus_db_file.
Line 898  sub initialize_keywords { Line 1690  sub initialize_keywords {
   
 =pod  =pod
   
 =item keyword($word)  =item * keyword($word)
   
 Returns true if $word is a keyword.  A keyword is a word that appears more   Returns true if $word is a keyword.  A keyword is a word that appears more 
 than the average number of times in the thesaurus database.  Calls   than the average number of times in the thesaurus database.  Calls 
Line 919  sub keyword { Line 1711  sub keyword {
   
 =pod   =pod 
   
 =item get_related_words  =item * get_related_words
   
 Look up a word in the thesaurus.  Takes a scalar arguement and returns  Look up a word in the thesaurus.  Takes a scalar argument and returns
 an array of words.  If the keyword is not in the thesaurus, an empty array  an array of words.  If the keyword is not in the thesaurus, an empty array
 will be returned.  The order of the words returned is determined by the  will be returned.  The order of the words returned is determined by the
 database which holds them.  database which holds them.
Line 956  sub get_related_words { Line 1748  sub get_related_words {
     return @Words;      return @Words;
 }  }
   
 ###############################################################  =pod
 ##              End Thesaurus Functions                      ##  
 ###############################################################  =back
   
   =cut
   
 # -------------------------------------------------------------- Plaintext name  # -------------------------------------------------------------- Plaintext name
   =pod
   
   =head1 User Name Functions
   
   =over 4
   
   =item * plainname($uname,$udom,$first)
   
   Takes a users logon name and returns it as a string in
   "first middle last generation" form 
   if $first is set to 'lastname' then it returns it as
   'lastname generation, firstname middlename' if their is a lastname
   
   =cut
   
   ###############################################################
 sub plainname {  sub plainname {
     my ($uname,$udom)=@_;      my ($uname,$udom,$first)=@_;
     my %names=&Apache::lonnet::get('environment',      my %names=&Apache::lonnet::get('environment',
                     ['firstname','middlename','lastname','generation'],                      ['firstname','middlename','lastname','generation'],
  $udom,$uname);   $udom,$uname);
     my $name=$names{'firstname'}.' '.$names{'middlename'}.' '.      my $name=&Apache::lonnet::format_name($names{'firstname'},
  $names{'lastname'}.' '.$names{'generation'};    $names{'middlename'},
     $names{'lastname'},
     $names{'generation'},$first);
       $name=~s/^\s+//;
     $name=~s/\s+$//;      $name=~s/\s+$//;
     $name=~s/\s+/ /g;      $name=~s/\s+/ /g;
       if ($name !~ /\S/) { $name=$uname.'@'.$udom; }
     return $name;      return $name;
 }  }
   
 # -------------------------------------------------------------------- Nickname  # -------------------------------------------------------------------- Nickname
   =pod
   
   =item * nickname($uname,$udom)
   
   Gets a users name and returns it as a string as
   
   "&quot;nickname&quot;"
   
   if the user has a nickname or
   
   "first middle last generation"
   
   if the user does not
   
   =cut
   
 sub nickname {  sub nickname {
     my ($uname,$udom)=@_;      my ($uname,$udom)=@_;
     my %names=&Apache::lonnet::get('environment',      my %names;
   ['nickname','firstname','middlename','lastname','generation'],$udom,$uname);      if ($uname eq $ENV{'user.name'} &&
     my $name=&Apache::lonnet::unescape($names{'nickname'});   $udom eq $ENV{'user.domain'}) {
    %names=('nickname'   => $ENV{'environment.nickname'}  ,
    'firstname'  => $ENV{'environment.firstname'} ,
    'middlename' => $ENV{'environment.middlename'},
    'lastname'   => $ENV{'environment.lastname'}  ,
    'generation' => $ENV{'environment.generation'});
       } else {
    %names=&Apache::lonnet::get('environment',
       ['nickname','firstname','middlename',
        'lastname','generation'],$udom,$uname);
       }
       my $name=$names{'nickname'};
     if ($name) {      if ($name) {
        $name='&quot;'.$name.'&quot;';          $name='&quot;'.$name.'&quot;'; 
     } else {      } else {
Line 996  sub nickname { Line 1834  sub nickname {
   
 # ------------------------------------------------------------------ Screenname  # ------------------------------------------------------------------ Screenname
   
   =pod
   
   =item * screenname($uname,$udom)
   
   Gets a users screenname and returns it as a string
   
   =cut
   
 sub screenname {  sub screenname {
     my ($uname,$udom)=@_;      my ($uname,$udom)=@_;
     my %names=      if ($uname eq $ENV{'user.name'} &&
  &Apache::lonnet::get('environment',['screenname'],$udom,$uname);   $udom eq $ENV{'user.domain'}) {return $ENV{'environment.screenname'};}
     return &Apache::lonnet::unescape($names{'screenname'});      my %names=&Apache::lonnet::get('environment',['screenname'],$udom,$uname);
       return $names{'screenname'};
 }  }
   
   
 # ------------------------------------------------------------- Message Wrapper  # ------------------------------------------------------------- Message Wrapper
   
 sub messagewrapper {  sub messagewrapper {
       my ($link,$username,$domain)=@_;
       return 
           '<a href="/adm/email?compose=individual&'.
           'recname='.$username.'&recdom='.$domain.'" '.
           'title="'.&mt('Send message').'">'.$link.'</a>';
   }
   # --------------------------------------------------------------- Notes Wrapper
   
   sub noteswrapper {
     my ($link,$un,$do)=@_;      my ($link,$un,$do)=@_;
     return       return 
 "<a href='/adm/email?compose=individual&recname=$un&recdom=$do'>$link</a>";  "<a href='/adm/email?recordftf=retrieve&recname=$un&recdom=$do'>$link</a>";
 }  }
 # ------------------------------------------------------------- Aboutme Wrapper  # ------------------------------------------------------------- Aboutme Wrapper
   
 sub aboutmewrapper {  sub aboutmewrapper {
     my ($link,$un,$do)=@_;      my ($link,$username,$domain,$target)=@_;
     return "<a href='/adm/$do/$un/aboutme'>$link</a>";      return '<a href="/adm/'.$domain.'/'.$username.'/aboutme"'.
    ($target?' target="$target"':'').' title="'.&mt('View this users personal page').'">'.$link.'</a>';
 }  }
   
 # ------------------------------------------------------------ Syllabus Wrapper  # ------------------------------------------------------------ Syllabus Wrapper
   
   
 sub syllabuswrapper {  sub syllabuswrapper {
     my ($link,$un,$do)=@_;      my ($linktext,$coursedir,$domain,$fontcolor)=@_;
     return "<a href='/public/$do/$un/syllabus'>$link</a>";      if ($fontcolor) { 
           $linktext='<font color="'.$fontcolor.'">'.$linktext.'</font>'; 
       }
       return qq{<a href="/public/$domain/$coursedir/syllabus">$linktext</a>};
   }
   
   sub track_student_link {
       my ($linktext,$sname,$sdom,$target) = @_;
       my $link ="/adm/trackstudent";
       my $title = 'View recent activity';
       if (defined($sname) && $sname !~ /^\s*$/ &&
           defined($sdom)  && $sdom  !~ /^\s*$/) {
           $link .= "?selected_student=$sname:$sdom";
           $title .= ' of this student';
       }
       if (defined($target) && $target !~ /^\s*$/) {
           $target = qq{target="$target"};
       } else {
           $target = '';
       }
       return qq{<a href="$link" title="$title" $target>$linktext</a>};
 }  }
   
 # ---------------------------------------------------------------- Language IDs  
   
   =pod
   
   =back
   
   =head1 Access .tab File Data
   
   =over 4
   
   =item * languageids() 
   
   returns list of all language ids
   
   =cut
   
 sub languageids {  sub languageids {
     return sort(keys(%language));      return sort(keys(%language));
 }  }
   
 # -------------------------------------------------------- Language Description  =pod
   
   =item * languagedescription() 
   
   returns description of a specified language id
   
   =cut
   
 sub languagedescription {  sub languagedescription {
     return $language{shift(@_)};      my $code=shift;
       return  ($supported_language{$code}?'* ':'').
               $language{$code}.
       ($supported_language{$code}?' ('.&mt('interface available').')':'');
   }
   
   sub plainlanguagedescription {
       my $code=shift;
       return $language{$code};
   }
   
   sub supportedlanguagecode {
       my $code=shift;
       return $supported_language{$code};
 }  }
   
 # --------------------------------------------------------------- Copyright IDs  =pod
   
   =item * copyrightids() 
   
   returns list of all copyrights
   
   =cut
   
 sub copyrightids {  sub copyrightids {
     return sort(keys(%cprtag));      return sort(keys(%cprtag));
 }  }
   
 # ------------------------------------------------------- Copyright Description  =pod
   
   =item * copyrightdescription() 
   
   returns description of a specified copyright id
   
   =cut
   
 sub copyrightdescription {  sub copyrightdescription {
     return $cprtag{shift(@_)};      return &mt($cprtag{shift(@_)});
   }
   
   =pod
   
   =item * source_copyrightids() 
   
   returns list of all source copyrights
   
   =cut
   
   sub source_copyrightids {
       return sort(keys(%scprtag));
   }
   
   =pod
   
   =item * source_copyrightdescription() 
   
   returns description of a specified source copyright id
   
   =cut
   
   sub source_copyrightdescription {
       return &mt($scprtag{shift(@_)});
 }  }
   
 # ------------------------------------------------------------- File Categories  =pod
   
   =item * filecategories() 
   
   returns list of all file categories
   
   =cut
   
 sub filecategories {  sub filecategories {
     return sort(keys(%category_extensions));      return sort(keys(%category_extensions));
 }  }
   
 # -------------------------------------- File Types within a specified category  =pod
   
   =item * filecategorytypes() 
   
   returns list of file types belonging to a given file
   category
   
   =cut
   
 sub filecategorytypes {  sub filecategorytypes {
     return @{$category_extensions{lc($_[0])}};      return @{$category_extensions{lc($_[0])}};
 }  }
   
 # ------------------------------------------------------------------ File Types  =pod
 sub fileextensions {  
     return sort(keys(%fe));  =item * fileembstyle() 
 }  
   returns embedding style for a specified file type
   
   =cut
   
 # ------------------------------------------------------------- Embedding Style  
 sub fileembstyle {  sub fileembstyle {
     return $fe{lc(shift(@_))};      return $fe{lc(shift(@_))};
 }  }
   
 # ------------------------------------------------------------ Description Text  
   sub filecategoryselect {
       my ($name,$value)=@_;
       return &select_form($value,$name,
    '' => &mt('Any category'),
    map { $_,$_ } sort(keys(%category_extensions)));
   }
   
   =pod
   
   =item * filedescription() 
   
   returns description for a specified file type
   
   =cut
   
 sub filedescription {  sub filedescription {
     return $fd{lc(shift(@_))};      my $file_description = $fd{lc(shift())};
       $file_description =~ s:([\[\]]):~$1:g;
       return &mt($file_description);
 }  }
   
 # ------------------------------------------------------------ Description Text  =pod
   
   =item * filedescriptionex() 
   
   returns description for a specified file type with
   extra formatting
   
   =cut
   
 sub filedescriptionex {  sub filedescriptionex {
     my $ex=shift;      my $ex=shift;
     return '.'.$ex.' '.$fd{lc($ex)};      my $file_description = $fd{lc($ex)};
       $file_description =~ s:([\[\]]):~$1:g;
       return '.'.$ex.' '.&mt($file_description);
 }  }
   
 # ---- Retrieve attempts by students  # End of .tab access
 # input  =pod
 # $symb             - problem including path  
 # $username,$domain - that of the student  =back
 # $course           - course name  
 # $getattempt       - leave blank if want all attempts, else put something.  =cut
 # $regexp           - regular expression. If string matches regexp send to  
 # $gradesub         - routine that process the string if it matches regexp  # ------------------------------------------------------------------ File Types
 #   sub fileextensions {
 # output      return sort(keys(%fe));
 # formatted as a table all the attempts, if any.  }
   
   # ----------------------------------------------------------- Display Languages
   # returns a hash with all desired display languages
 #  #
   
   sub display_languages {
       my %languages=();
       foreach (&preferred_languages()) {
    $languages{$_}=1;
       }
       &get_unprocessed_cgi($ENV{'QUERY_STRING'},['displaylanguage']);
       if ($ENV{'form.displaylanguage'}) {
    foreach (split(/\s*(\,|\;|\:)\s*/,$ENV{'form.displaylanguage'})) {
       $languages{$_}=1;
           }
       }
       return %languages;
   }
   
   sub preferred_languages {
       my @languages=();
       if ($ENV{'course.'.$ENV{'request.course.id'}.'.languages'}) {
    @languages=(@languages,split(/\s*(\,|\;|\:)\s*/,
            $ENV{'course.'.$ENV{'request.course.id'}.'.languages'}));
       }
       if ($ENV{'environment.languages'}) {
    @languages=split(/\s*(\,|\;|\:)\s*/,$ENV{'environment.languages'});
       }
       my $browser=(split(/\;/,$ENV{'HTTP_ACCEPT_LANGUAGE'}))[0];
       if ($browser) {
    @languages=(@languages,split(/\s*(\,|\;|\:)\s*/,$browser));
       }
       if ($Apache::lonnet::domain_lang_def{$ENV{'user.domain'}}) {
    @languages=(@languages,
    $Apache::lonnet::domain_lang_def{$ENV{'user.domain'}});
       }
       if ($Apache::lonnet::domain_lang_def{$ENV{'request.role.domain'}}) {
    @languages=(@languages,
    $Apache::lonnet::domain_lang_def{$ENV{'request.role.domain'}});
       }
       if ($Apache::lonnet::domain_lang_def{
                             $Apache::lonnet::perlvar{'lonDefDomain'}}) {
    @languages=(@languages,
    $Apache::lonnet::domain_lang_def{
                                     $Apache::lonnet::perlvar{'lonDefDomain'}});
       }
   # turn "en-ca" into "en-ca,en"
       my @genlanguages;
       foreach (@languages) {
    unless ($_=~/\w/) { next; }
    push (@genlanguages,$_);
    if ($_=~/(\-|\_)/) {
       push (@genlanguages,(split(/(\-|\_)/,$_))[0]);
    }
       }
       return @genlanguages;
   }
   
   ###############################################################
   ##               Student Answer Attempts                     ##
   ###############################################################
   
   =pod
   
   =head1 Alternate Problem Views
   
   =over 4
   
   =item * get_previous_attempt($symb, $username, $domain, $course,
       $getattempt, $regexp, $gradesub)
   
   Return string with previous attempt on problem. Arguments:
   
   =over 4
   
   =item * $symb: Problem, including path
   
   =item * $username: username of the desired student
   
   =item * $domain: domain of the desired student
   
   =item * $course: Course ID
   
   =item * $getattempt: Leave blank for all attempts, otherwise put
       something
   
   =item * $regexp: if string matches this regexp, the string will be
       sent to $gradesub
   
   =item * $gradesub: routine that processes the string if it matches $regexp
   
   =back
   
   The output string is a table containing all desired attempts, if any.
   
   =cut
   
 sub get_previous_attempt {  sub get_previous_attempt {
   my ($symb,$username,$domain,$course,$getattempt,$regexp,$gradesub)=@_;    my ($symb,$username,$domain,$course,$getattempt,$regexp,$gradesub)=@_;
   my $prevattempts='';    my $prevattempts='';
Line 1129  sub get_previous_attempt { Line 2220  sub get_previous_attempt {
        } else {         } else {
   $value=$returnhash{$version.':'.$_};    $value=$returnhash{$version.':'.$_};
        }         }
        $prevattempts.='<td>'.$value.'&nbsp;</td>';            $prevattempts.='<td>'.&Apache::lonnet::unescape($value).'&nbsp;</td>';   
     }      }
  }   }
       }        }
Line 1141  sub get_previous_attempt { Line 2232  sub get_previous_attempt {
  } else {   } else {
   $value=$lasthash{$_};    $value=$lasthash{$_};
  }   }
    $value=&Apache::lonnet::unescape($value);
  if ($_ =~/$regexp$/ && (defined &$gradesub)) {$value = &$gradesub($value)}   if ($_ =~/$regexp$/ && (defined &$gradesub)) {$value = &$gradesub($value)}
  $prevattempts.='<td>'.$value.'&nbsp;</td>';   $prevattempts.='<td>'.$value.'&nbsp;</td>';
       }        }
Line 1153  sub get_previous_attempt { Line 2245  sub get_previous_attempt {
   }    }
 }  }
   
   sub relative_to_absolute {
       my ($url,$output)=@_;
       my $parser=HTML::TokeParser->new(\$output);
       my $token;
       my $thisdir=$url;
       my @rlinks=();
       while ($token=$parser->get_token) {
    if ($token->[0] eq 'S') {
       if ($token->[1] eq 'a') {
    if ($token->[2]->{'href'}) {
       $rlinks[$#rlinks+1]=$token->[2]->{'href'};
    }
       } elsif ($token->[1] eq 'img' || $token->[1] eq 'embed' ) {
    $rlinks[$#rlinks+1]=$token->[2]->{'src'};
       } elsif ($token->[1] eq 'base') {
    $thisdir=$token->[2]->{'href'};
       }
    }
       }
       $thisdir=~s-/[^/]*$--;
       foreach (@rlinks) {
    unless (($_=~/^http:\/\//i) ||
    ($_=~/^\//) ||
    ($_=~/^javascript:/i) ||
    ($_=~/^mailto:/i) ||
    ($_=~/^\#/)) {
       my $newlocation=&Apache::lonnet::hreflocation($thisdir,$_);
       $output=~s/(\"|\'|\=\s*)$_(\"|\'|\s|\>)/$1$newlocation$2/;
    }
       }
   # -------------------------------------------------- Deal with Applet codebases
       $output=~s/(\<applet[^\>]+)(codebase\=[^\S\>]+)*([^\>]*)\>/$1.($2?$2:' codebase="'.$thisdir.'"').$3.'>'/gei;
       return $output;
   }
   
   =pod
   
   =item * get_student_view
   
   show a snapshot of what student was looking at
   
   =cut
   
 sub get_student_view {  sub get_student_view {
   my ($symb,$username,$domain,$courseid,$target) = @_;    my ($symb,$username,$domain,$courseid,$target,$moreenv) = @_;
   my ($map,$id,$feedurl) = split(/___/,$symb);    my ($map,$id,$feedurl) = &Apache::lonnet::decode_symb($symb);
   my (%old,%moreenv);    my (%form);
   my @elements=('symb','courseid','domain','username');    my @elements=('symb','courseid','domain','username');
   foreach my $element (@elements) {    foreach my $element (@elements) {
     $old{$element}=$ENV{'form.grade_'.$element};        $form{'grade_'.$element}=eval '$'.$element #'
     $moreenv{'form.grade_'.$element}=eval '$'.$element #'  
   }    }
   if ($target eq 'tex') {$moreenv{'form.grade_target'} = 'tex';}    if (defined($moreenv)) {
   &Apache::lonnet::appenv(%moreenv);        %form=(%form,%{$moreenv});
   my $userview=&Apache::lonnet::ssi('/res/'.$feedurl);  
   &Apache::lonnet::delenv('form.grade_');  
   foreach my $element (@elements) {  
     $ENV{'form.grade_'.$element}=$old{$element};  
   }    }
     if (defined($target)) { $form{'grade_target'} = $target; }
     $feedurl=&Apache::lonnet::clutter($feedurl);
     my $userview=&Apache::lonnet::ssi_body($feedurl,%form);
   $userview=~s/\<body[^\>]*\>//gi;    $userview=~s/\<body[^\>]*\>//gi;
   $userview=~s/\<\/body\>//gi;    $userview=~s/\<\/body\>//gi;
   $userview=~s/\<html\>//gi;    $userview=~s/\<html\>//gi;
Line 1176  sub get_student_view { Line 2309  sub get_student_view {
   $userview=~s/\<head\>//gi;    $userview=~s/\<head\>//gi;
   $userview=~s/\<\/head\>//gi;    $userview=~s/\<\/head\>//gi;
   $userview=~s/action\s*\=/would_be_action\=/gi;    $userview=~s/action\s*\=/would_be_action\=/gi;
     $userview=&relative_to_absolute($feedurl,$userview);
   return $userview;    return $userview;
 }  }
   
   =pod
   
   =item * get_student_answers() 
   
   show a snapshot of how student was answering problem
   
   =cut
   
 sub get_student_answers {  sub get_student_answers {
   my ($symb,$username,$domain,$courseid) = @_;    my ($symb,$username,$domain,$courseid,%form) = @_;
   my ($map,$id,$feedurl) = split(/___/,$symb);    my ($map,$id,$feedurl) = &Apache::lonnet::decode_symb($symb);
   my (%old,%moreenv);    my (%moreenv);
   my @elements=('symb','courseid','domain','username');    my @elements=('symb','courseid','domain','username');
   foreach my $element (@elements) {    foreach my $element (@elements) {
     $old{$element}=$ENV{'form.grade_'.$element};      $moreenv{'grade_'.$element}=eval '$'.$element #'
     $moreenv{'form.grade_'.$element}=eval '$'.$element #'  
   }  
   $moreenv{'form.grade_target'}='answer';  
   &Apache::lonnet::appenv(%moreenv);  
   my $userview=&Apache::lonnet::ssi('/res/'.$feedurl);  
   &Apache::lonnet::delenv('form.grade_');  
   foreach my $element (@elements) {  
     $ENV{'form.grade_'.$element}=$old{$element};  
   }    }
     $moreenv{'grade_target'}='answer';
     %moreenv=(%form,%moreenv);
     my $userview=&Apache::lonnet::ssi('/res/'.$feedurl,%moreenv);
   return $userview;    return $userview;
 }  }
   
   =pod
   
   =item * &submlink()
   
   Inputs: $text $uname $udom $symb $target
   
   Returns: A link to grades.pm such as to see the SUBM view of a student
   
   =cut
   
   ###############################################
   sub submlink {
       my ($text,$uname,$udom,$symb,$target)=@_;
       if (!($uname && $udom)) {
    (my $cursymb, my $courseid,$udom,$uname)=
       &Apache::lonxml::whichuser($symb);
    if (!$symb) { $symb=$cursymb; }
       }
       if (!$symb) { $symb=&symbread(); }
       $symb=&Apache::lonnet::escape($symb);
       if ($target) { $target="target=\"$target\""; }
       return '<a href="/adm/grades?&command=submission&'.
    'symb='.$symb.'&student='.$uname.
    '&userdom='.$udom.'" '.$target.'>'.$text.'</a>';
   }
   ##############################################
   
   =pod
   
   =item * &pgrdlink()
   
   Inputs: $text $uname $udom $symb $target
   
   Returns: A link to grades.pm such as to see the PGRD view of a student
   
   =cut
   
   ###############################################
   sub pgrdlink {
       my $link=&submlink(@_);
       $link=~s/(&command=submission)/$1&showgrading=yes/;
       return $link;
   }
   ##############################################
   
   =pod
   
   =item * &pprmlink()
   
   Inputs: $text $uname $udom $symb $target
   
   Returns: A link to parmset.pm such as to see the PPRM view of a
   student andn resource
   
   =cut
   
   ###############################################
   sub pprmlink {
       my ($text,$uname,$udom,$symb,$target)=@_;
       if (!($uname && $udom)) {
    (my $cursymb, my $courseid,$udom,$uname)=
       &Apache::lonxml::whichuser($symb);
    if (!$symb) { $symb=$cursymb; }
       }
       if (!$symb) { $symb=&symbread(); }
       $symb=&Apache::lonnet::escape($symb);
       if ($target) { $target="target=\"$target\""; }
       return '<a href="/adm/parmset?&command=set&'.
    'symb='.$symb.'&uname='.$uname.
    '&udom='.$udom.'" '.$target.'>'.$text.'</a>';
   }
   ##############################################
   
   =pod
   
   =back
   
   =cut
   
 ###############################################  ###############################################
   
   
Line 1218  sub maketime { Line 2434  sub maketime {
     my %th=@_;      my %th=@_;
     return POSIX::mktime(      return POSIX::mktime(
         ($th{'seconds'},$th{'minutes'},$th{'hours'},          ($th{'seconds'},$th{'minutes'},$th{'hours'},
          $th{'day'},$th{'month'}-1,$th{'year'}-1900,0,0,$th{'dlsav'}));           $th{'day'},$th{'month'}-1,$th{'year'}-1900,0,0,-1));
 }  }
   
   #########################################
   
 sub findallcourses {  sub findallcourses {
     my %courses=();      my %courses=();
Line 1246  sub findallcourses { Line 2463  sub findallcourses {
   
 =pod  =pod
   
 =item &determinedomain()  =head1 Domain Template Functions
   
   =over 4
   
   =item * &determinedomain()
   
 Inputs: $domain (usually will be undef)  Inputs: $domain (usually will be undef)
   
Line 1270  sub determinedomain { Line 2491  sub determinedomain {
 ###############################################  ###############################################
 =pod  =pod
   
 =item &domainlogo()  =item * &domainlogo()
   
 Inputs: $domain (usually will be undef)  Inputs: $domain (usually will be undef)
   
Line 1278  Returns: A link to a domain logo, if the Line 2499  Returns: A link to a domain logo, if the
 If the domain logo does not exist, a description of the domain.  If the domain logo does not exist, a description of the domain.
   
 =cut  =cut
   
 ###############################################  ###############################################
 sub domainlogo {  sub domainlogo {
     my $domain = &determinedomain(shift);          my $domain = &determinedomain(shift);    
      # See if there is a logo       # See if there is a logo
     if (-e '/home/httpd/html/adm/lonDomLogos/'.$domain.'.gif') {      if (-e '/home/httpd/html/adm/lonDomLogos/'.$domain.'.gif') {
         return '<img src="/adm/lonDomLogos/'.$domain.'.gif" />';   my $logo=&lonhttpdurl("/adm/lonDomLogos/$domain.gif");
           return '<img src="'.$logo.'" alt="'.$domain.'" />';
     } elsif(exists($Apache::lonnet::domaindescription{$domain})) {      } elsif(exists($Apache::lonnet::domaindescription{$domain})) {
         return $Apache::lonnet::domaindescription{$domain};          return $Apache::lonnet::domaindescription{$domain};
     } else {      } else {
Line 1294  sub domainlogo { Line 2517  sub domainlogo {
   
 =pod  =pod
   
 =item &designparm()  =item * &designparm()
   
 Inputs: $which parameter; $domain (usually will be undef)  Inputs: $which parameter; $domain (usually will be undef)
   
 Returns: value of designparamter $which  Returns: value of designparamter $which
   
 =cut  =cut
   
 ##############################################  ##############################################
 sub designparm {  sub designparm {
     my ($which,$domain)=@_;      my ($which,$domain)=@_;
       if ($ENV{'browser.blackwhite'} eq 'on') {
    if ($which=~/\.(font|alink|vlink|link)$/) {
       return '#000000';
    }
    if ($which=~/\.(pgbg|sidebg)$/) {
       return '#FFFFFF';
    }
    if ($which=~/\.tabbg$/) {
       return '#CCCCCC';
    }
       }
       if ($ENV{'environment.color.'.$which}) {
    return $ENV{'environment.color.'.$which};
       }
     $domain=&determinedomain($domain);      $domain=&determinedomain($domain);
     if ($designhash{$domain.'.'.$which}) {      if ($designhash{$domain.'.'.$which}) {
  return $designhash{$domain.'.'.$which};   return $designhash{$domain.'.'.$which};
Line 1317  sub designparm { Line 2555  sub designparm {
   
 =pod  =pod
   
 =item &bodytag()  =back
   
   =head1 HTTP Helpers
   
   =over 4
   
   =item * &bodytag()
   
 Returns a uniform header for LON-CAPA web pages.  Returns a uniform header for LON-CAPA web pages.
   
 Inputs:   Inputs: 
   
  $title, A title to be displayed on the page.  =over 4
  $function, the current role (can be undef).  
  $addentries, extra parameters for the <body> tag.  =item * $title, A title to be displayed on the page.
  $bodyonly, if defined, only return the <body> tag.  
  $domain, if defined, force a given domain.  =item * $function, the current role (can be undef).
   
   =item * $addentries, extra parameters for the <body> tag.
   
   =item * $bodyonly, if defined, only return the <body> tag.
   
   =item * $domain, if defined, force a given domain.
   
   =item * $forcereg, if page should register as content page (relevant for 
               text interface only)
   
   =back
   
 Returns: A uniform header for LON-CAPA web pages.    Returns: A uniform header for LON-CAPA web pages.  
 If $bodyonly is nonzero, a string containing a <body> tag will be returned.  If $bodyonly is nonzero, a string containing a <body> tag will be returned.
Line 1336  other decorations will be returned. Line 2591  other decorations will be returned.
   
 =cut  =cut
   
 ###############################################  
   
   
 ###############################################  
 sub bodytag {  sub bodytag {
     my ($title,$function,$addentries,$bodyonly,$domain)=@_;      my ($title,$function,$addentries,$bodyonly,$domain,$forcereg,$customtitle)=@_;
     unless ($function) {      $title=&mt($title);
  $function='student';      $function = &get_users_function() if (!$function);
         if ($ENV{'request.role'}=~/^(cc|in|ta|ep)/) {  
     $function='coordinator';  
         }  
  if ($ENV{'request.role'}=~/^(su|dc|ad|li)/) {  
             $function='admin';  
         }  
         if (($ENV{'request.role'}=~/^(au|ca)/) ||  
             ($ENV{'REQUEST_URI'}=~/^(\/priv|\~)/)) {  
             $function='author';  
         }  
     }  
     my $img=&designparm($function.'.img',$domain);      my $img=&designparm($function.'.img',$domain);
     my $pgbg=&designparm($function.'.pgbg',$domain);      my $pgbg=&designparm($function.'.pgbg',$domain);
     my $tabbg=&designparm($function.'.tabbg',$domain);      my $tabbg=&designparm($function.'.tabbg',$domain);
Line 1363  sub bodytag { Line 2603  sub bodytag {
     my $alink=&designparm($function.'.alink',$domain);      my $alink=&designparm($function.'.alink',$domain);
     my $vlink=&designparm($function.'.vlink',$domain);      my $vlink=&designparm($function.'.vlink',$domain);
     my $sidebg=&designparm($function.'.sidebg',$domain);      my $sidebg=&designparm($function.'.sidebg',$domain);
   # Accessibility font enhance
       unless ($addentries) { $addentries=''; }
       my $addstyle='';
       if ($ENV{'browser.fontenhance'} eq 'on') {
    $addstyle=' font-size: x-large;';
       }
  # role and realm   # role and realm
     my ($role,$realm)      my ($role,$realm)
        =&Apache::lonnet::plaintext((split(/\./,$ENV{'request.role'}))[0]);         =&Apache::lonnet::plaintext((split(/\./,$ENV{'request.role'}))[0]);
Line 1375  sub bodytag { Line 2620  sub bodytag {
     unless ($realm) { $realm='&nbsp;'; }      unless ($realm) { $realm='&nbsp;'; }
 # Set messages  # Set messages
     my $messages=&domainlogo($domain);      my $messages=&domainlogo($domain);
 # Output  # Port for miniserver
       my $lonhttpdPort=$Apache::lonnet::perlvar{'lonhttpdPort'};
       if (!defined($lonhttpdPort)) { $lonhttpdPort='8080'; }
   # construct main body tag
     my $bodytag = <<END;      my $bodytag = <<END;
   <style type="text/css">
   h1, h2, h3, th { font-family: Arial, Helvetica, sans-serif }
   a:focus { color: red; background: yellow } 
   </style>
 <body bgcolor="$pgbg" text="$font" alink="$alink" vlink="$vlink" link="$link"  <body bgcolor="$pgbg" text="$font" alink="$alink" vlink="$vlink" link="$link"
 $addentries>  style="margin-top: 0px;$addstyle" $addentries>
 END  END
       if ($ENV{'environment.texengine'} eq 'jsMath') {
    $bodytag.='<script type="text/javascript">
                        function NoFontMessage () {}
                      </script>'."\n".
       '<script src="/adm/jsMath/jsMath.js"></script>'."\n";
       }
   
       my $upperleft='<img src="http://'.$ENV{'HTTP_HOST'}.':'.
                      $lonhttpdPort.$img.'" alt="'.$function.'" />';
     if ($bodyonly) {      if ($bodyonly) {
         return $bodytag;          return $bodytag;
     } else {      } elsif ($ENV{'browser.interface'} eq 'textual') {
         return(<<ENDBODY);  # Accessibility
             
           return $bodytag.&Apache::lonmenu::menubuttons($forcereg,'web',
                                                         $forcereg).
                  '<h1>LON-CAPA: '.$title.'</h1>';
       } elsif ($ENV{'environment.remote'} eq 'off') {
   # No Remote
    my $roleinfo=(<<ENDROLE);
   <td bgcolor="$tabbg" align="right">
   <font size="2" face="Arial, Helvetica, sans-serif">
       $ENV{'environment.firstname'}
       $ENV{'environment.middlename'}
       $ENV{'environment.lastname'}
       $ENV{'environment.generation'}
       </font>&nbsp;
   <br />
   <font size="2" face="Arial, Helvetica, sans-serif">$role</font>&nbsp;
   <br />
   <font size="2" face="Arial, Helvetica, sans-serif">$realm</font>&nbsp;
   </td>
   ENDROLE
           my $titleinfo = '<font face="Arial, Helvetica, sans-serif" size="+3" color="'.
    $font.'"><b>'.$title.'</b></font>';
           if ($customtitle) {
               $titleinfo = $customtitle;
           }
   
    if ($ENV{'request.state'} eq 'construct') {
       my ($uname,$thisdisfn)=
    ($ENV{'request.filename'} =~ m|^/home/([^/]+)/public_html/(.*)|);
       my $formaction='/priv/'.$uname.'/'.$thisdisfn;
       $formaction=~s/\/+/\//g;
               unless ($customtitle) {  #this is for resources; directories have customtitle, and crumbs and select recent are created in lonpubdir.pm  
                   my $parentpath = '';
                   my $lastitem = '';
                   if ($thisdisfn =~ m-(.+/)([^/]*)$-) {
                       $parentpath = $1;
                       $lastitem = $2;
                   } else {
                       $lastitem = $thisdisfn;
                   }
           $titleinfo = &Apache::loncommon::help_open_menu('','','','',3,'Authoring').
                         '<font face="Arial, Helvetica, sans-serif"><b>Construction Space</b>:</font>&nbsp;'. 
                         '<form name="dirs" method="post" action="'.$formaction
       .'" target="_top"><tt><b>'
       .&Apache::lonhtmlcommon::crumbs($uname.'/'.$parentpath,'_top','/priv','','+1',1)."<font size=\"+1\">$lastitem</font></b></tt><br />"
       .&Apache::lonhtmlcommon::select_recent('construct','recent','this.form.action=this.form.recent.value;this.form.submit()')
       .'</form>'
       .&Apache::lonmenu::constspaceform();
   
               }
       $forcereg=1;
           }
           my $titletable = '<table bgcolor="'.$pgbg.'" width="100%" border="0" '.
                            'cellspacing="3" cellpadding="3">'.
                            '<tr><td rowspan="3" bgcolor="'.$tabbg.'">'.
                            $titleinfo.'</td>'.$roleinfo.'</tr></table>';
           if ($ENV{'request.state'} eq 'construct') {
               $bodytag .= &Apache::lonmenu::menubuttons($forcereg,'web',$forcereg,$titletable);
    } else {
               $bodytag .= &Apache::lonmenu::menubuttons($forcereg,'web',$forcereg).
                           $titletable;
           }
           return $bodytag;
       }
   
   #
   # Top frame rendering, Remote is up
   #
       my $titleinfo = '&nbsp;<font size="5" face="Arial, Helvetica, sans-serif"><b>'.$title.'</b></font>';
       if ($customtitle) {
           $titleinfo = $customtitle;
       }
       #
       # Extra info if you are the DC
       my $dc_info = '';
       if ($ENV{'user.adv'} && exists($ENV{'user.role.dc./'.
                           $ENV{'course.'.$ENV{'request.course.id'}.
                                    '.domain'}.'/'})) {
           my $cid = $ENV{'request.course.id'};
           $dc_info.= $cid.' '.$ENV{'course.'.$cid.'.internal.coursecode'};
           $dc_info = '('.$dc_info.')';
       }
       #
       return(<<ENDBODY);
 $bodytag  $bodytag
 <table width="100%" cellspacing="0" border="0" cellpadding="0">  <table width="100%" cellspacing="0" border="0" cellpadding="0">
 <tr><td bgcolor="$font">  <tr><td bgcolor="$sidebg">
 <img src="$img" /></td>  $upperleft</td>
 <td bgcolor="$font"><font color='$sidebg'>$messages</font></td>  <td bgcolor="$sidebg" align="right">$messages&nbsp;</td>
 </tr>  </tr>
 <tr>  <tr>
 <td rowspan="3" bgcolor="$tabbg">  <td rowspan="3" bgcolor="$tabbg">
 &nbsp;<font size="5"><b>$title</b></font>  $titleinfo $dc_info
 <td bgcolor="$tabbg"  align="right">  <td bgcolor="$tabbg" align="right">
 <font size="2">  <font size="2" face="Arial, Helvetica, sans-serif">
     $ENV{'environment.firstname'}      $ENV{'environment.firstname'}
     $ENV{'environment.middlename'}      $ENV{'environment.middlename'}
     $ENV{'environment.lastname'}      $ENV{'environment.lastname'}
Line 1403  $bodytag Line 2748  $bodytag
 </td>  </td>
 </tr>  </tr>
 <tr><td bgcolor="$tabbg" align="right">  <tr><td bgcolor="$tabbg" align="right">
 <font size="2">$role</font>&nbsp;  <font size="2" face="Arial, Helvetica, sans-serif">$role</font>&nbsp;
 </td></tr>  </td></tr>
 <tr>  <tr>
 <td bgcolor="$tabbg" align="right"><font size="2">$realm</font>&nbsp;</td></tr>  <td bgcolor="$tabbg" align="right"><font size="2" face="Arial, Helvetica, sans-serif">$realm</font>&nbsp;</td></tr>
 </table><br>  </table><br />
 ENDBODY  ENDBODY
   }
   
   ###############################################
   ###############################################
   
   =pod
   
   =back
   
   =head1 HTTP Helpers
   
   =over 4
   
   =item * &endbodytag()
   
   Returns a uniform footer for LON-CAPA web pages.
   
   Inputs: 
   
   =over 4
   
   =back
   
   Returns: A uniform footer for LON-CAPA web pages.  
   
   =cut
   
   sub endbodytag {
       my $endbodytag='</body>';
       if ($ENV{'environment.texengine'} eq 'jsMath') {
    $endbodytag='<script type="text/javascript">jsMath.Process()</script>'.
       "\n".$endbodytag;
     }      }
       return $endbodytag;
 }  }
   
 ###############################################  ###############################################
   
   =pod
   
   =item get_users_function
   
   Used by &bodytag to determine the current users primary role.
   Returns either 'student','coordinator','admin', or 'author'.
   
   =cut
   
   ###############################################
   sub get_users_function {
       my $function = 'student';
       if ($ENV{'request.role'}=~/^(cc|in|ta|ep)/) {
           $function='coordinator';
       }
       if ($ENV{'request.role'}=~/^(su|dc|ad|li)/) {
           $function='admin';
       }
       if (($ENV{'request.role'}=~/^(au|ca)/) ||
           ($ENV{'REQUEST_URI'}=~/^(\/priv|\~)/)) {
           $function='author';
       }
       return $function;
   }
   
   ###############################################
   
   =pod
   
   =item get_sections
   
   Determines all the sections for a course including
   sections with students and sections containing other roles.
   Incoming parameters: domain, course number, reference to 
   section hash (keys to be section/group IDs), reference to 
   array containing roles for which sections should be gathered
   (optional). If the fourth argument is undefined, sections
   are gathered for any role.
    
   Returns number of sections.
   
   =cut
   
   ###############################################
   sub get_sections {
       my ($cdom,$cnum,$sectioncount,$possible_roles) = @_;
       if (!($cdom && $cnum)) { return 0; }
       my $cid = $cdom.'_'.$cnum;
       my $numsections = 0;
   
       if (!defined($possible_roles) || (grep/^st$/,@$possible_roles)) {
    my ($classlist) = &Apache::loncoursedata::get_classlist($cid,$cdom,$cnum);
    my $sec_index = &Apache::loncoursedata::CL_SECTION();
    my $status_index = &Apache::loncoursedata::CL_STATUS();
    while (my ($student,$data) = each %$classlist) {
       my ($section,$status) = ($data->[$sec_index],
        $data->[$status_index]);
       unless ($section eq '-1' || $section =~ /^\s*$/) {
    if (!defined($$sectioncount{$section})) { $numsections++; }
    $$sectioncount{$section}++;
       }
    }
       }
       my %courseroles = &Apache::lonnet::dump('nohist_userroles',$cdom,$cnum);
       foreach my $user (sort(keys(%courseroles))) {
    if ($user !~ /^(\w{2})/) { next; }
    my ($role) = ($user =~ /^(\w{2})/);
    if ($possible_roles && !(grep(/^$role$/,@$possible_roles))) { next; }
    my $section;
    if ($role eq 'cr' &&
       $user =~ m-^$role/[^/]*/[^/]*/[^/]*:[^:]*:[^:]*:(\w+)-) {
       $section=$1;
    }
    if ($user =~ /^$role:[^:]*:[^:]*:(\w+)/) { $section=$1; }
    if (!defined($section) || $section eq '-1') { next; }
    if (!defined($$sectioncount{$section})) { $numsections++; } 
    $$sectioncount{$section}++;
       }
       return $numsections;
   }
   
   
   sub get_posted_cgi {
       my $r=shift;
   
       my $buffer;
       
       $r->read($buffer,$r->header_in('Content-length'),0);
       unless ($buffer=~/^(\-+\w+)\s+Content\-Disposition\:\s*form\-data/si) {
    my @pairs=split(/&/,$buffer);
    my $pair;
    foreach $pair (@pairs) {
       my ($name,$value) = split(/=/,$pair);
       $value =~ tr/+/ /;
       $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
       $name  =~ tr/+/ /;
       $name  =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
       &add_to_env("form.$name",$value);
    }
       } else {
    my $contentsep=$1;
    my @lines = split (/\n/,$buffer);
    my $name='';
    my $value='';
    my $fname='';
    my $fmime='';
    my $i;
    for ($i=0;$i<=$#lines;$i++) {
       if ($lines[$i]=~/^$contentsep/) {
    if ($name) {
       chomp($value);
       if ($fname) {
    $ENV{"form.$name.filename"}=$fname;
    $ENV{"form.$name.mimetype"}=$fmime;
       } else {
    $value=~s/\s+$//s;
       }
       &add_to_env("form.$name",$value);
    }
    if ($i<$#lines) {
       $i++;
       $lines[$i]=~
    /Content\-Disposition\:\s*form\-data\;\s*name\=\"([^\"]+)\"/i;
       $name=$1;
       $value='';
       if ($lines[$i]=~/filename\=\"([^\"]+)\"/i) {
    $fname=$1;
    if 
                               ($lines[$i+1]=~/Content\-Type\:\s*([\w\-\/]+)/i) {
    $fmime=$1;
    $i++;
       } else {
    $fmime='';
       }
       } else {
    $fname='';
    $fmime='';
       }
       $i++;
    }
       } else {
    $value.=$lines[$i]."\n";
       }
    }
       }
       $ENV{'request.method'}=$ENV{'REQUEST_METHOD'};
       $r->method_number(M_GET);
       $r->method('GET');
       $r->headers_in->unset('Content-length');
   }
   
   =pod
   
   =item * get_unprocessed_cgi($query,$possible_names)
   
   Modify the %ENV hash to contain unprocessed CGI form parameters held in
   $query.  The parameters listed in $possible_names (an array reference),
   will be set in $ENV{'form.name'} if they do not already exist.
   
   Typically called with $ENV{'QUERY_STRING'} as the first parameter.  
   $possible_names is an ref to an array of form element names.  As an example:
   get_unprocessed_cgi($ENV{'QUERY_STRING'},['uname','udom']);
   will result in $ENV{'form.uname'} and $ENV{'form.udom'} being set.
   
   =cut
   
 sub get_unprocessed_cgi {  sub get_unprocessed_cgi {
   my ($query,$possible_names)= @_;    my ($query,$possible_names)= @_;
   # $Apache::lonxml::debug=1;    # $Apache::lonxml::debug=1;
Line 1428  sub get_unprocessed_cgi { Line 2973  sub get_unprocessed_cgi {
   }    }
 }  }
   
   =pod
   
   =item * cacheheader() 
   
   returns cache-controlling header code
   
   =cut
   
 sub cacheheader {  sub cacheheader {
   unless ($ENV{'request.method'} eq 'GET') { return ''; }      unless ($ENV{'request.method'} eq 'GET') { return ''; }
   my $date=strftime("%a, %d %b %Y %H:%M:%S GMT",gmtime);      my $date=strftime("%a, %d %b %Y %H:%M:%S GMT",gmtime);
   my $output .='<meta HTTP-EQUIV="Expires" CONTENT="'.$date.'" />      my $output .='<meta HTTP-EQUIV="Expires" CONTENT="'.$date.'" />
                 <meta HTTP-EQUIV="Cache-control" CONTENT="no-cache" />                  <meta HTTP-EQUIV="Cache-control" CONTENT="no-cache" />
                 <meta HTTP-EQUIV="Pragma" CONTENT="no-cache" />';                  <meta HTTP-EQUIV="Pragma" CONTENT="no-cache" />';
   return $output;      return $output;
 }  }
   
   =pod
   
   =item * no_cache($r) 
   
   specifies header code to not have cache
   
   =cut
   
 sub no_cache {  sub no_cache {
   my ($r) = @_;      my ($r) = @_;
   unless ($ENV{'request.method'} eq 'GET') { return ''; }      if ($ENV{'REQUEST_METHOD'} ne 'GET' &&
   #my $date=strftime("%a, %d %b %Y %H:%M:%S GMT",gmtime);   $ENV{'request.method'} ne 'GET') { return ''; }
   $r->no_cache(1);      my $date=strftime("%a, %d %b %Y %H:%M:%S GMT",gmtime(time));
   $r->header_out("Pragma" => "no-cache");      $r->no_cache(1);
   #$r->header_out("Expires" => $date);      $r->header_out("Expires" => $date);
       $r->header_out("Pragma" => "no-cache");
   }
   
   sub content_type {
       my ($r,$type,$charset) = @_;
       unless ($charset) {
    $charset=&Apache::lonlocal::current_encoding;
       }
       if ($charset) { $type.='; charset='.$charset; }
       if ($r) {
    $r->content_type($type);
       } else {
    print("Content-type: $type\n\n");
       }
 }  }
   
   =pod
   
   =item * add_to_env($name,$value) 
   
   adds $name to the %ENV hash with value
   $value, if $name already exists, the entry is converted to an array
   reference and $value is added to the array.
   
   =cut
   
 sub add_to_env {  sub add_to_env {
   my ($name,$value)=@_;    my ($name,$value)=@_;
   if (defined($ENV{$name})) {    if (defined($ENV{$name})) {
Line 1465  sub add_to_env { Line 3050  sub add_to_env {
   
 =pod  =pod
   
   =item * get_env_multiple($name) 
   
   gets $name from the %ENV hash, it seemlessly handles the cases where multiple
   values may be defined and end up as an array ref.
   
   returns an array of values
   
   =cut
   
   sub get_env_multiple {
       my ($name) = @_;
       my @values;
       if (defined($ENV{$name})) {
           # exists is it an array
           if (ref($ENV{$name})) {
               @values=@{ $ENV{$name} };
           } else {
               $values[0]=$ENV{$name};
           }
       }
       return(@values);
   }
   
   
   =pod
   
 =back   =back 
   
 =head2 CSV Upload/Handling functions  =head1 CSV Upload/Handling functions
   
 =over 4  =over 4
   
 =item  upfile_store($r)  =item * upfile_store($r)
   
 Store uploaded file, $r should be the HTTP Request object,  Store uploaded file, $r should be the HTTP Request object,
 needs $ENV{'form.upfile'}  needs $ENV{'form.upfile'}
Line 1489  sub upfile_store { Line 3100  sub upfile_store {
     my $datatoken=$ENV{'user.name'}.'_'.$ENV{'user.domain'}.      my $datatoken=$ENV{'user.name'}.'_'.$ENV{'user.domain'}.
  '_enroll_'.$ENV{'request.course.id'}.'_'.time.'_'.$$;   '_enroll_'.$ENV{'request.course.id'}.'_'.time.'_'.$$;
     {      {
  my $fh=Apache::File->new('>'.$r->dir_config('lonDaemons').          my $datafile = $r->dir_config('lonDaemons').
  '/tmp/'.$datatoken.'.tmp');                             '/tmp/'.$datatoken.'.tmp';
  print $fh $ENV{'form.upfile'};          if ( open(my $fh,">$datafile") ) {
               print $fh $ENV{'form.upfile'};
               close($fh);
           }
     }      }
     return $datatoken;      return $datatoken;
 }  }
   
 =pod  =pod
   
 =item load_tmp_file($r)  =item * load_tmp_file($r)
   
 Load uploaded file from tmp, $r should be the HTTP Request object,  Load uploaded file from tmp, $r should be the HTTP Request object,
 needs $ENV{'form.datatoken'},  needs $ENV{'form.datatoken'},
Line 1510  sub load_tmp_file { Line 3124  sub load_tmp_file {
     my $r=shift;      my $r=shift;
     my @studentdata=();      my @studentdata=();
     {      {
  my $fh;          my $studentfile = $r->dir_config('lonDaemons').
  if ($fh=Apache::File->new($r->dir_config('lonDaemons').                                '/tmp/'.$ENV{'form.datatoken'}.'.tmp';
   '/tmp/'.$ENV{'form.datatoken'}.'.tmp')) {          if ( open(my $fh,"<$studentfile") ) {
     @studentdata=<$fh>;              @studentdata=<$fh>;
  }              close($fh);
           }
     }      }
     $ENV{'form.upfile'}=join('',@studentdata);      $ENV{'form.upfile'}=join('',@studentdata);
 }  }
   
 =pod  =pod
   
 =item upfile_record_sep()  =item * upfile_record_sep()
   
 Separate uploaded file into records  Separate uploaded file into records
 returns array of records,  returns array of records,
Line 1532  needs $ENV{'form.upfile'} and $ENV{'form Line 3147  needs $ENV{'form.upfile'} and $ENV{'form
 sub upfile_record_sep {  sub upfile_record_sep {
     if ($ENV{'form.upfiletype'} eq 'xml') {      if ($ENV{'form.upfiletype'} eq 'xml') {
     } else {      } else {
  return split(/\n/,$ENV{'form.upfile'});   my @records;
    foreach my $line (split(/\n/,$ENV{'form.upfile'})) {
       if ($line=~/^\s*$/) { next; }
       push(@records,$line);
    }
    return @records;
     }      }
 }  }
   
 =pod  =pod
   
 =item record_sep($record)  =item * record_sep($record)
   
 Separate a record into fields $record should be an item from the upfile_record_sep(), needs $ENV{'form.upfiletype'}  Separate a record into fields $record should be an item from the upfile_record_sep(), needs $ENV{'form.upfiletype'}
   
Line 1559  sub record_sep { Line 3179  sub record_sep {
         }          }
     } elsif ($ENV{'form.upfiletype'} eq 'tab') {      } elsif ($ENV{'form.upfiletype'} eq 'tab') {
         my $i=0;          my $i=0;
         foreach (split(/\t+/,$record)) {          foreach (split(/\t/,$record)) {
             my $field=$_;              my $field=$_;
             $field=~s/^(\"|\')//;              $field=~s/^(\"|\')//;
             $field=~s/(\"|\')$//;              $field=~s/(\"|\')$//;
Line 1588  sub record_sep { Line 3208  sub record_sep {
     return %components;      return %components;
 }  }
   
   ######################################################
   ######################################################
   
 =pod  =pod
   
 =item upfile_select_html()  =item * upfile_select_html()
   
 return HTML code to select file and specify its type  Return HTML code to select a file from the users machine and specify 
   the file type.
   
 =cut  =cut
   
   ######################################################
   ######################################################
 sub upfile_select_html {  sub upfile_select_html {
     return (<<'ENDUPFORM');      my %Types = (
 <input type="file" name="upfile" size="50" />                   csv   => &mt('CSV (comma separated values, spreadsheet)'),
 <br />Type: <select name="upfiletype">                   space => &mt('Space separated'),
 <option value="csv">CSV (comma separated values, spreadsheet)</option>                   tab   => &mt('Tabulator separated'),
 <option value="space">Space separated</option>  #                 xml   => &mt('HTML/XML'),
 <option value="tab">Tabulator separated</option>                   );
 <option value="xml">HTML/XML</option>      my $Str = '<input type="file" name="upfile" size="50" />'.
 </select>          '<br />Type: <select name="upfiletype">';
 ENDUPFORM      foreach my $type (sort(keys(%Types))) {
           $Str .= '<option value="'.$type.'" >'.$Types{$type}."</option>\n";
       }
       $Str .= "</select>\n";
       return $Str;
 }  }
   
   ######################################################
   ######################################################
   
 =pod  =pod
   
 =item csv_print_samples($r,$records)  =item * csv_print_samples($r,$records)
   
 Prints a table of sample values from each column uploaded $r is an  Prints a table of sample values from each column uploaded $r is an
 Apache Request ref, $records is an arrayref from  Apache Request ref, $records is an arrayref from
Line 1618  Apache Request ref, $records is an array Line 3251  Apache Request ref, $records is an array
   
 =cut  =cut
   
   ######################################################
   ######################################################
 sub csv_print_samples {  sub csv_print_samples {
     my ($r,$records) = @_;      my ($r,$records) = @_;
     my (%sone,%stwo,%sthree);      my (%sone,%stwo,%sthree);
     %sone=&record_sep($$records[0]);      %sone=&record_sep($$records[0]);
     if (defined($$records[1])) {%stwo=&record_sep($$records[1]);}      if (defined($$records[1])) {%stwo=&record_sep($$records[1]);}
     if (defined($$records[2])) {%sthree=&record_sep($$records[2]);}      if (defined($$records[2])) {%sthree=&record_sep($$records[2]);}
       #
     $r->print('Samples<br /><table border="2"><tr>');      $r->print(&mt('Samples').'<br /><table border="2"><tr>');
     foreach (sort({$a <=> $b} keys(%sone))) { $r->print('<th>Column&nbsp;'.($_+1).'</th>'); }      foreach (sort({$a <=> $b} keys(%sone))) { 
           $r->print('<th>'.&mt('Column&nbsp;[_1]',($_+1)).'</th>'); }
     $r->print('</tr>');      $r->print('</tr>');
     foreach my $hash (\%sone,\%stwo,\%sthree) {      foreach my $hash (\%sone,\%stwo,\%sthree) {
  $r->print('<tr>');   $r->print('<tr>');
Line 1640  sub csv_print_samples { Line 3276  sub csv_print_samples {
     $r->print('</tr></table><br />'."\n");      $r->print('</tr></table><br />'."\n");
 }  }
   
   ######################################################
   ######################################################
   
 =pod  =pod
   
 =item csv_print_select_table($r,$records,$d)  =item * csv_print_select_table($r,$records,$d)
   
 Prints a table to create associations between values and table columns.  Prints a table to create associations between values and table columns.
   
 $r is an Apache Request ref,  $r is an Apache Request ref,
 $records is an arrayref from &Apache::loncommon::upfile_record_sep,  $records is an arrayref from &Apache::loncommon::upfile_record_sep,
 $d is an array of 2 element arrays (internal name, displayed name)  $d is an array of 2 element arrays (internal name, displayed name,defaultcol)
   
 =cut  =cut
   
   ######################################################
   ######################################################
 sub csv_print_select_table {  sub csv_print_select_table {
     my ($r,$records,$d) = @_;      my ($r,$records,$d) = @_;
     my $i=0;my %sone;      my $i=0;my %sone;
     %sone=&record_sep($$records[0]);      %sone=&record_sep($$records[0]);
     $r->print('Associate columns with student attributes.'."\n".      $r->print(&mt('Associate columns with student attributes.')."\n".
      '<table border="2"><tr><th>Attribute</th><th>Column</th></tr>'."\n");       '<table border="2"><tr>'.
                 '<th>'.&mt('Attribute').'</th>'.
                 '<th>'.&mt('Column').'</th></tr>'."\n");
     foreach (@$d) {      foreach (@$d) {
  my ($value,$display)=@{ $_ };   my ($value,$display,$defaultcol)=@{ $_ };
  $r->print('<tr><td>'.$display.'</td>');   $r->print('<tr><td>'.$display.'</td>');
   
  $r->print('<td><select name=f'.$i.   $r->print('<td><select name=f'.$i.
   ' onchange="javascript:flip(this.form,'.$i.');">');    ' onchange="javascript:flip(this.form,'.$i.');">');
  $r->print('<option value="none"></option>');   $r->print('<option value="none"></option>');
  foreach (sort({$a <=> $b} keys(%sone))) {   foreach (sort({$a <=> $b} keys(%sone))) {
     $r->print('<option value="'.$_.'">Column '.($_+1).'</option>');      $r->print('<option value="'.$_.'"'.
                         ($_ eq $defaultcol ? ' selected ' : '').
                         '>Column '.($_+1).'</option>');
  }   }
  $r->print('</select></td></tr>'."\n");   $r->print('</select></td></tr>'."\n");
  $i++;   $i++;
Line 1674  sub csv_print_select_table { Line 3320  sub csv_print_select_table {
     return $i;      return $i;
 }  }
   
   ######################################################
   ######################################################
   
 =pod  =pod
   
 =item csv_samples_select_table($r,$records,$d)  =item * csv_samples_select_table($r,$records,$d)
   
 Prints a table of sample values from the upload and can make associate samples to internal names.  Prints a table of sample values from the upload and can make associate samples to internal names.
   
Line 1686  $d is an array of 2 element arrays (inte Line 3335  $d is an array of 2 element arrays (inte
   
 =cut  =cut
   
   ######################################################
   ######################################################
 sub csv_samples_select_table {  sub csv_samples_select_table {
     my ($r,$records,$d) = @_;      my ($r,$records,$d) = @_;
     my %sone; my %stwo; my %sthree;      my %sone; my %stwo; my %sthree;
     my $i=0;      my $i=0;
       #
     $r->print('<table border=2><tr><th>Field</th><th>Samples</th></tr>');      $r->print('<table border=2><tr><th>'.
                 &mt('Field').'</th><th>'.&mt('Samples').'</th></tr>');
     %sone=&record_sep($$records[0]);      %sone=&record_sep($$records[0]);
     if (defined($$records[1])) {%stwo=&record_sep($$records[1]);}      if (defined($$records[1])) {%stwo=&record_sep($$records[1]);}
     if (defined($$records[2])) {%sthree=&record_sep($$records[2]);}      if (defined($$records[2])) {%sthree=&record_sep($$records[2]);}
       #
     foreach (sort keys %sone) {      foreach (sort keys %sone) {
  $r->print('<tr><td><select name=f'.$i.   $r->print('<tr><td><select name="f'.$i.'"'.
   ' onchange="javascript:flip(this.form,'.$i.');">');    ' onchange="javascript:flip(this.form,'.$i.');">');
  foreach (@$d) {   foreach (@$d) {
     my ($value,$display)=@{ $_ };      my ($value,$display,$defaultcol)=@{ $_ };
     $r->print('<option value='.$value.'>'.$display.'</option>');      $r->print('<option value="'.$value.'"'.
                         ($i eq $defaultcol ? ' selected ':'').'>'.
                         $display.'</option>');
  }   }
  $r->print('</select></td><td>');   $r->print('</select></td><td>');
  if (defined($sone{$_})) { $r->print($sone{$_}."</br>\n"); }   if (defined($sone{$_})) { $r->print($sone{$_}."</br>\n"); }
Line 1713  sub csv_samples_select_table { Line 3367  sub csv_samples_select_table {
     $i--;      $i--;
     return($i);      return($i);
 }  }
 1;  
 __END__;  ######################################################
   ######################################################
   
 =pod  =pod
   
   =item clean_excel_name($name)
   
   Returns a replacement for $name which does not contain any illegal characters.
   
   =cut
   
   ######################################################
   ######################################################
   sub clean_excel_name {
       my ($name) = @_;
       $name =~ s/[:\*\?\/\\]//g;
       if (length($name) > 31) {
           $name = substr($name,0,31);
       }
       return $name;
   }
   
   =pod
   
   =item * check_if_partid_hidden($id,$symb,$udom,$uname)
   
   Returns either 1 or undef
   
   1 if the part is to be hidden, undef if it is to be shown
   
   Arguments are:
   
   $id the id of the part to be checked
   $symb, optional the symb of the resource to check
   $udom, optional the domain of the user to check for
   $uname, optional the username of the user to check for
   
   =cut
   
   sub check_if_partid_hidden {
       my ($id,$symb,$udom,$uname) = @_;
       my $hiddenparts=&Apache::lonnet::EXT('resource.0.hiddenparts',
    $symb,$udom,$uname);
       my $truth=1;
       #if the string starts with !, then the list is the list to show not hide
       if ($hiddenparts=~s/^\s*!//) { $truth=undef; }
       my @hiddenlist=split(/,/,$hiddenparts);
       foreach my $checkid (@hiddenlist) {
    if ($checkid =~ /^\s*\Q$id\E\s*$/) { return $truth; }
       }
       return !$truth;
   }
   
   
   ############################################################
   ############################################################
   
   =pod
   
   =back 
   
   =head1 cgi-bin script and graphing routines
   
   =over 4
   
   =item get_cgi_id
   
   Inputs: none
   
   Returns an id which can be used to pass environment variables
   to various cgi-bin scripts.  These environment variables will
   be removed from the users environment after a given time by
   the routine &Apache::lonnet::transfer_profile_to_env.
   
   =cut
   
   ############################################################
   ############################################################
   my $uniq=0;
   sub get_cgi_id {
       $uniq=($uniq+1)%100000;
       return (time.'_'.$uniq);
   }
   
   ############################################################
   ############################################################
   
   =pod
   
   =item DrawBarGraph
   
   Facilitates the plotting of data in a (stacked) bar graph.
   Puts plot definition data into the users environment in order for 
   graph.png to plot it.  Returns an <img> tag for the plot.
   The bars on the plot are labeled '1','2',...,'n'.
   
   Inputs:
   
   =over 4
   
   =item $Title: string, the title of the plot
   
   =item $xlabel: string, text describing the X-axis of the plot
   
   =item $ylabel: string, text describing the Y-axis of the plot
   
   =item $Max: scalar, the maximum Y value to use in the plot
   If $Max is < any data point, the graph will not be rendered.
   
   =item $colors: array ref holding the colors to be used for the data sets when
   they are plotted.  If undefined, default values will be used.
   
   =item $labels: array ref holding the labels to use on the x-axis for the bars.
   
   =item @Values: An array of array references.  Each array reference holds data
   to be plotted in a stacked bar chart.
   
   =item If the final element of @Values is a hash reference the key/value
   pairs will be added to the graph definition.
   
 =back  =back
   
 =head2 Access .tab File Data  Returns:
   
   An <img> tag which references graph.png and the appropriate identifying
   information for the plot.
   
   =cut
   
   ############################################################
   ############################################################
   sub DrawBarGraph {
       my ($Title,$xlabel,$ylabel,$Max,$colors,$labels,@Values)=@_;
       #
       if (! defined($colors)) {
           $colors = ['#33ff00', 
                     '#0033cc', '#990000', '#aaaa66', '#663399', '#ff9933',
                     '#66ccff', '#ff9999', '#cccc33', '#660000', '#33cc66',
                     ]; 
       }
       my $extra_settings = {};
       if (ref($Values[-1]) eq 'HASH') {
           $extra_settings = pop(@Values);
       }
       #
       my $identifier = &get_cgi_id();
       my $id = 'cgi.'.$identifier;        
       if (! @Values || ref($Values[0]) ne 'ARRAY') {
           return '';
       }
       #
       my @Labels;
       if (defined($labels)) {
           @Labels = @$labels;
       } else {
           for (my $i=0;$i<@{$Values[0]};$i++) {
               push (@Labels,$i+1);
           }
       }
       #
       my $NumBars = scalar(@{$Values[0]});
       if ($NumBars < scalar(@Labels)) { $NumBars = scalar(@Labels); }
       my %ValuesHash;
       my $NumSets=1;
       foreach my $array (@Values) {
           next if (! ref($array));
           $ValuesHash{$id.'.data.'.$NumSets++} = 
               join(',',@$array);
       }
       #
       my ($height,$width,$xskip,$bar_width) = (200,120,1,15);
       if ($NumBars < 3) {
           $width = 120+$NumBars*32;
           $xskip = 1;
           $bar_width = 30;
       } elsif ($NumBars < 5) {
           $width = 120+$NumBars*20;
           $xskip = 1;
           $bar_width = 20;
       } elsif ($NumBars < 10) {
           $width = 120+$NumBars*15;
           $xskip = 1;
           $bar_width = 15;
       } elsif ($NumBars <= 25) {
           $width = 120+$NumBars*11;
           $xskip = 5;
           $bar_width = 8;
       } elsif ($NumBars <= 50) {
           $width = 120+$NumBars*8;
           $xskip = 5;
           $bar_width = 4;
       } else {
           $width = 120+$NumBars*8;
           $xskip = 5;
           $bar_width = 4;
       }
       #
       $Max = 1 if ($Max < 1);
       if ( int($Max) < $Max ) {
           $Max++;
           $Max = int($Max);
       }
       $Title  = '' if (! defined($Title));
       $xlabel = '' if (! defined($xlabel));
       $ylabel = '' if (! defined($ylabel));
       $ValuesHash{$id.'.title'}    = &Apache::lonnet::escape($Title);
       $ValuesHash{$id.'.xlabel'}   = &Apache::lonnet::escape($xlabel);
       $ValuesHash{$id.'.ylabel'}   = &Apache::lonnet::escape($ylabel);
       $ValuesHash{$id.'.y_max_value'} = $Max;
       $ValuesHash{$id.'.NumBars'}  = $NumBars;
       $ValuesHash{$id.'.NumSets'}  = $NumSets;
       $ValuesHash{$id.'.PlotType'} = 'bar';
       $ValuesHash{$id.'.Colors'}   = join(',',@{$colors});
       $ValuesHash{$id.'.height'}   = $height;
       $ValuesHash{$id.'.width'}    = $width;
       $ValuesHash{$id.'.xskip'}    = $xskip;
       $ValuesHash{$id.'.bar_width'} = $bar_width;
       $ValuesHash{$id.'.labels'} = join(',',@Labels);
       #
       # Deal with other parameters
       while (my ($key,$value) = each(%$extra_settings)) {
           $ValuesHash{$id.'.'.$key} = $value;
       }
       #
       &Apache::lonnet::appenv(%ValuesHash);
       return '<img src="/cgi-bin/graph.png?'.$identifier.'" border="1" />';
   }
   
   ############################################################
   ############################################################
   
   =pod
   
   =item DrawXYGraph
   
   Facilitates the plotting of data in an XY graph.
   Puts plot definition data into the users environment in order for 
   graph.png to plot it.  Returns an <img> tag for the plot.
   
   Inputs:
   
 =over 4  =over 4
   
 =item languageids()   =item $Title: string, the title of the plot
   
 returns list of all language ids  =item $xlabel: string, text describing the X-axis of the plot
   
 =item languagedescription()   =item $ylabel: string, text describing the Y-axis of the plot
   
 returns description of a specified language id  =item $Max: scalar, the maximum Y value to use in the plot
   If $Max is < any data point, the graph will not be rendered.
   
 =item copyrightids()   =item $colors: Array ref containing the hex color codes for the data to be 
   plotted in.  If undefined, default values will be used.
   
 returns list of all copyrights  =item $Xlabels: Array ref containing the labels to be used for the X-axis.
   
 =item copyrightdescription()   =item $Ydata: Array ref containing Array refs.  
   Each of the contained arrays will be plotted as a separate curve.
   
 returns description of a specified copyright id  =item %Values: hash indicating or overriding any default values which are 
   passed to graph.png.  
   Possible values are: width, xskip, x_ticks, x_tick_offset, among others.
   
 =item filecategories()   =back
   
 returns list of all file categories  Returns:
   
 =item filecategorytypes()   An <img> tag which references graph.png and the appropriate identifying
   information for the plot.
   
 returns list of file types belonging to a given file  =cut
 category  
   ############################################################
   ############################################################
   sub DrawXYGraph {
       my ($Title,$xlabel,$ylabel,$Max,$colors,$Xlabels,$Ydata,%Values)=@_;
       #
       # Create the identifier for the graph
       my $identifier = &get_cgi_id();
       my $id = 'cgi.'.$identifier;
       #
       $Title  = '' if (! defined($Title));
       $xlabel = '' if (! defined($xlabel));
       $ylabel = '' if (! defined($ylabel));
       my %ValuesHash = 
           (
            $id.'.title'  => &Apache::lonnet::escape($Title),
            $id.'.xlabel' => &Apache::lonnet::escape($xlabel),
            $id.'.ylabel' => &Apache::lonnet::escape($ylabel),
            $id.'.y_max_value'=> $Max,
            $id.'.labels'     => join(',',@$Xlabels),
            $id.'.PlotType'   => 'XY',
            );
       #
       if (defined($colors) && ref($colors) eq 'ARRAY') {
           $ValuesHash{$id.'.Colors'}   = join(',',@{$colors});
       }
       #
       if (! ref($Ydata) || ref($Ydata) ne 'ARRAY') {
           return '';
       }
       my $NumSets=1;
       foreach my $array (@{$Ydata}){
           next if (! ref($array));
           $ValuesHash{$id.'.data.'.$NumSets++} = join(',',@$array);
       }
       $ValuesHash{$id.'.NumSets'} = $NumSets-1;
       #
       # Deal with other parameters
       while (my ($key,$value) = each(%Values)) {
           $ValuesHash{$id.'.'.$key} = $value;
       }
       #
       &Apache::lonnet::appenv(%ValuesHash);
       return '<img src="/cgi-bin/graph.png?'.$identifier.'" border="1" />';
   }
   
 =item fileembstyle()   ############################################################
   ############################################################
   
 returns embedding style for a specified file type  =pod
   
 =item filedescription()   =item DrawXYYGraph
   
 returns description for a specified file type  Facilitates the plotting of data in an XY graph with two Y axes.
   Puts plot definition data into the users environment in order for 
   graph.png to plot it.  Returns an <img> tag for the plot.
   
 =item filedescriptionex()   Inputs:
   
 returns description for a specified file type with  =over 4
 extra formatting  
   =item $Title: string, the title of the plot
   
   =item $xlabel: string, text describing the X-axis of the plot
   
   =item $ylabel: string, text describing the Y-axis of the plot
   
   =item $colors: Array ref containing the hex color codes for the data to be 
   plotted in.  If undefined, default values will be used.
   
   =item $Xlabels: Array ref containing the labels to be used for the X-axis.
   
   =item $Ydata1: The first data set
   
   =item $Min1: The minimum value of the left Y-axis
   
   =item $Max1: The maximum value of the left Y-axis
   
   =item $Ydata2: The second data set
   
   =item $Min2: The minimum value of the right Y-axis
   
   =item $Max2: The maximum value of the left Y-axis
   
   =item %Values: hash indicating or overriding any default values which are 
   passed to graph.png.  
   Possible values are: width, xskip, x_ticks, x_tick_offset, among others.
   
 =back  =back
   
 =head2 Alternate Problem Views  Returns:
   
   An <img> tag which references graph.png and the appropriate identifying
   information for the plot.
   
   =cut
   
   ############################################################
   ############################################################
   sub DrawXYYGraph {
       my ($Title,$xlabel,$ylabel,$colors,$Xlabels,$Ydata1,$Min1,$Max1,
                                           $Ydata2,$Min2,$Max2,%Values)=@_;
       #
       # Create the identifier for the graph
       my $identifier = &get_cgi_id();
       my $id = 'cgi.'.$identifier;
       #
       $Title  = '' if (! defined($Title));
       $xlabel = '' if (! defined($xlabel));
       $ylabel = '' if (! defined($ylabel));
       my %ValuesHash = 
           (
            $id.'.title'  => &Apache::lonnet::escape($Title),
            $id.'.xlabel' => &Apache::lonnet::escape($xlabel),
            $id.'.ylabel' => &Apache::lonnet::escape($ylabel),
            $id.'.labels' => join(',',@$Xlabels),
            $id.'.PlotType' => 'XY',
            $id.'.NumSets' => 2,
            $id.'.two_axes' => 1,
            $id.'.y1_max_value' => $Max1,
            $id.'.y1_min_value' => $Min1,
            $id.'.y2_max_value' => $Max2,
            $id.'.y2_min_value' => $Min2,
            );
       #
       if (defined($colors) && ref($colors) eq 'ARRAY') {
           $ValuesHash{$id.'.Colors'}   = join(',',@{$colors});
       }
       #
       if (! ref($Ydata1) || ref($Ydata1) ne 'ARRAY' ||
           ! ref($Ydata2) || ref($Ydata2) ne 'ARRAY'){
           return '';
       }
       my $NumSets=1;
       foreach my $array ($Ydata1,$Ydata2){
           next if (! ref($array));
           $ValuesHash{$id.'.data.'.$NumSets++} = join(',',@$array);
       }
       #
       # Deal with other parameters
       while (my ($key,$value) = each(%Values)) {
           $ValuesHash{$id.'.'.$key} = $value;
       }
       #
       &Apache::lonnet::appenv(%ValuesHash);
       return '<img src="/cgi-bin/graph.png?'.$identifier.'" border="1" />';
   }
   
   ############################################################
   ############################################################
   
   =pod
   
   =back 
   
   =head1 Statistics helper routines?  
   
   Bad place for them but what the hell.
   
 =over 4  =over 4
   
 =item get_previous_attempt()   =item &chartlink
   
 return string with previous attempt on problem  Returns a link to the chart for a specific student.  
   
 =item get_student_view()   Inputs:
   
 show a snapshot of what student was looking at  =over 4
   
 =item get_student_answers()   =item $linktext: The text of the link
   
 show a snapshot of how student was answering problem  =item $sname: The students username
   
   =item $sdomain: The students domain
   
   =back
   
 =back  =back
   
 =head2 HTTP Helper  =cut
   
   ############################################################
   ############################################################
   sub chartlink {
       my ($linktext, $sname, $sdomain) = @_;
       my $link = '<a href="/adm/statistics?reportSelected=student_assessment'.
           '&amp;SelectedStudent='.&Apache::lonnet::escape($sname.':'.$sdomain).
           '&amp;chartoutputmode='.HTML::Entities::encode('html, with all links').
          '">'.$linktext.'</a>';
   }
   
   #######################################################
   #######################################################
   
   =pod
   
   =head1 Course Environment Routines
   
 =over 4  =over 4
   
 =item get_unprocessed_cgi($query,$possible_names)  =item &restore_course_settings 
   
 Modify the %ENV hash to contain unprocessed CGI form parameters held in  =item &store_course_settings
 $query.  The parameters listed in $possible_names (an array reference),  
 will be set in $ENV{'form.name'} if they do not already exist.  
   
 Typically called with $ENV{'QUERY_STRING'} as the first parameter.    Restores/Store indicated form parameters from the course environment.
 $possible_names is an ref to an array of form element names.  As an example:  Will not overwrite existing values of the form parameters.
 get_unprocessed_cgi($ENV{'QUERY_STRING'},['uname','udom']);  
 will result in $ENV{'form.uname'} and $ENV{'form.udom'} being set.  Inputs: 
   a scalar describing the data (e.g. 'chart', 'problem_analysis')
   
 =item cacheheader()   a hash ref describing the data to be stored.  For example:
      
   %Save_Parameters = ('Status' => 'scalar',
       'chartoutputmode' => 'scalar',
       'chartoutputdata' => 'scalar',
       'Section' => 'array',
       'StudentData' => 'array',
       'Maps' => 'array');
   
   Returns: both routines return nothing
   
 returns cache-controlling header code  =cut
   
 =item no_cache($r)   #######################################################
   #######################################################
   sub store_course_settings {
       # save to the environment
       # appenv the same items, just to be safe
       my $courseid = $ENV{'request.course.id'};
       my $coursedom = $ENV{'course.'.$courseid.'.domain'};
       my ($prefix,$Settings) = @_;
       my %SaveHash;
       my %AppHash;
       while (my ($setting,$type) = each(%$Settings)) {
           my $basename = 'internal.'.$prefix.'.'.$setting;
           my $envname = 'course.'.$courseid.'.'.$basename;
           if (exists($ENV{'form.'.$setting})) {
               # Save this value away
               if ($type eq 'scalar' &&
                   (! exists($ENV{$envname}) || 
                    $ENV{$envname} ne $ENV{'form.'.$setting})) {
                   $SaveHash{$basename} = $ENV{'form.'.$setting};
                   $AppHash{$envname}   = $ENV{'form.'.$setting};
               } elsif ($type eq 'array') {
                   my $stored_form;
                   if (ref($ENV{'form.'.$setting})) {
                       $stored_form = join(',',
                                           map {
                                               &Apache::lonnet::escape($_);
                                           } sort(@{$ENV{'form.'.$setting}}));
                   } else {
                       $stored_form = 
                           &Apache::lonnet::escape($ENV{'form.'.$setting});
                   }
                   # Determine if the array contents are the same.
                   if ($stored_form ne $ENV{$envname}) {
                       $SaveHash{$basename} = $stored_form;
                       $AppHash{$envname}   = $stored_form;
                   }
               }
           }
       }
       my $put_result = &Apache::lonnet::put('environment',\%SaveHash,
                                             $coursedom,
                                             $ENV{'course.'.$courseid.'.num'});
       if ($put_result !~ /^(ok|delayed)/) {
           &Apache::lonnet::logthis('unable to save form parameters, '.
                                    'got error:'.$put_result);
       }
       # Make sure these settings stick around in this session, too
       &Apache::lonnet::appenv(%AppHash);
       return;
   }
   
 specifies header code to not have cache  sub restore_course_settings {
       my $courseid = $ENV{'request.course.id'};
       my ($prefix,$Settings) = @_;
       while (my ($setting,$type) = each(%$Settings)) {
           next if (exists($ENV{'form.'.$setting}));
           my $envname = 'course.'.$courseid.'.internal.'.$prefix.
               '.'.$setting;
           if (exists($ENV{$envname})) {
               if ($type eq 'scalar') {
                   $ENV{'form.'.$setting} = $ENV{$envname};
               } elsif ($type eq 'array') {
                   $ENV{'form.'.$setting} = [ 
                                              map { 
                                                  &Apache::lonnet::unescape($_); 
                                              } split(',',$ENV{$envname})
                                              ];
               }
           }
       }
   }
   
 =item add_to_env($name,$value)   ############################################################
   ############################################################
   
 adds $name to the %ENV hash with value  sub propath {
 $value, if $name already exists, the entry is converted to an array      my ($udom,$uname)=@_;
 reference and $value is added to the array.      $udom=~s/\W//g;
       $uname=~s/\W//g;
       my $subdir=$uname.'__';
       $subdir =~ s/(.)(.)(.).*/$1\/$2\/$3/;
       my $proname="$Apache::lonnet::perlvar{'lonUsersDir'}/$udom/$subdir/$uname";
       return $proname;
   } 
   
   sub icon {
       my ($file)=@_;
       my $curfext = (split(/\./,$file))[-1];
       my $iconname=$Apache::lonnet::perlvar{'lonIconsURL'}.'/unknown.gif';
       my $embstyle = &Apache::loncommon::fileembstyle($curfext);
       if (!(!defined($embstyle) || $embstyle eq 'unk' || $embstyle eq 'hdn')) {
    if (-e  $Apache::lonnet::perlvar{'lonDocRoot'}.'/'.
             $Apache::lonnet::perlvar{'lonIconsURL'}.'/'.
               $curfext.".gif") {
       $iconname=$Apache::lonnet::perlvar{'lonIconsURL'}.'/'.
    $curfext.".gif";
    }
       }
       return &lonhttpdurl($iconname);
   } 
   
   sub lonhttpdurl {
       my ($url)=@_;
       my $lonhttpd_port=$Apache::lonnet::perlvar{'lonhttpdPort'};
       if (!defined($lonhttpd_port)) { $lonhttpd_port='8080'; }
       return 'http://'.$ENV{'SERVER_NAME'}.':'.$lonhttpd_port.$url;
   }
   
   sub connection_aborted {
       my ($r)=@_;
       $r->print(" ");$r->rflush();
       my $c = $r->connection;
       return $c->aborted();
   }
   
   #    Escapes strings that may have embedded 's that will be put into
   #    strings as 'strings'.
   sub escape_single {
       my ($input) = @_;
       $input =~ s/\\/\\\\/g; # Escape the \'s..(must be first)>
       $input =~ s/\'/\\\'/g; # Esacpe the 's....
       return $input;
   }
   
   #  Same as escape_single, but escape's "'s  This 
   #  can be used for  "strings"
   sub escape_double {
       my ($input) = @_;
       $input =~ s/\\/\\\\/g; # Escape the /'s..(must be first)>
       $input =~ s/\"/\\\"/g; # Esacpe the "s....
       return $input;
   }
    
   #   Escapes the last element of a full URL.
   sub escape_url {
       my ($url)   = @_;
       my @urlslices = split(/\//, $url,-1);
       my $lastitem = &Apache::lonnet::escape(pop(@urlslices));
       return join('/',@urlslices).'/'.$lastitem;
   }
   =pod
   
 =back  =back
   
 =cut  =cut
   
   1;
   __END__;
   
Removed from v.1.67  
changed lines
  Added in v.1.252

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