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function stubs to be implemented for .tab files -Scott Harrison

    1: # The LearningOnline Network with CAPA
    2: # a pile of common routines
    3: #
    4: # $Id: loncommon.pm,v 1.14 2001/12/11 19:37:12 harris41 Exp $
    5: #
    6: # Copyright Michigan State University Board of Trustees
    7: #
    8: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
    9: #
   10: # LON-CAPA is free software; you can redistribute it and/or modify
   11: # it under the terms of the GNU General Public License as published by
   12: # the Free Software Foundation; either version 2 of the License, or
   13: # (at your option) any later version.
   14: #
   15: # LON-CAPA is distributed in the hope that it will be useful,
   16: # but WITHOUT ANY WARRANTY; without even the implied warranty of
   17: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   18: # GNU General Public License for more details.
   19: #
   20: # You should have received a copy of the GNU General Public License
   21: # along with LON-CAPA; if not, write to the Free Software
   22: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
   23: #
   24: # /home/httpd/html/adm/gpl.txt
   25: #
   26: # http://www.lon-capa.org/
   27: #
   28: # YEAR=2001
   29: # 2/13-12/7 Guy Albertelli
   30: # 12/11 Scott Harrison
   31: 
   32: # Makes a table out of the previous attempts
   33: # Inputs result_from_symbread, user, domain, course_id
   34: 
   35: package Apache::loncommon;
   36: 
   37: use strict;
   38: use POSIX qw(strftime);
   39: use Apache::Constants qw(:common);
   40: use Apache::lonmsg();
   41: 
   42: my %language;
   43: my %cprtag;
   44: my %fe; my %fd;
   45: 
   46: # ----------------------------------------------------------------------- BEGIN
   47: sub BEGIN {
   48: # ------------------------------------------------------------------- languages
   49:     {
   50: 	my $fh=Apache::File->new($Apache::lonnet::perlvar{'lonTabDir'}.
   51: 				 '/language.tab');
   52: 	while (<$fh>) {
   53: 	    next if /^\#/;
   54: 	    chomp;
   55: 	    my ($key,$val)=(split(/\s+/,$_,2));
   56: 	    $language{$key}=$val;
   57: 	}
   58:     }
   59: # ------------------------------------------------------------------ copyrights
   60:     {
   61: 	my $fh=Apache::File->new($Apache::lonnet::perlvar{'lonTabDir'}.
   62: 				 '/copyright.tab');
   63: 	while (<$fh>) {
   64: 	    next if /^\#/;
   65: 	    chomp;
   66: 	    my ($key,$val)=(split(/\s+/,$_,2));
   67: 	    $cprtag{$key}=$val;
   68: 	}
   69:     }
   70: # ------------------------------------------------------------------ file types
   71:     {
   72: 	my $fh=Apache::File->new("$perlvar{'lonTabDir'}/filetypes.tab");
   73: 	while (<$fh>) {
   74: 	    next if (/^\#/);
   75: 	    chomp;
   76: 	    my ($ending,$emb,$descr)=split(/\s+/,$_,3);
   77: 	    if ($descr ne '') { 
   78: 		$fe{$ending}=lc($emb);
   79: 		$fd{$ending}=join(' ',@descr);
   80: 	    }
   81: 	}
   82:     }
   83: }
   84: 
   85: # ---------------------------------------------------------------- Language IDs
   86: sub languageids {
   87: 
   88: }
   89: 
   90: # -------------------------------------------------------- Language Description
   91: sub languagedescription {
   92: 
   93: }
   94: 
   95: # --------------------------------------------------------------- Copyright IDs
   96: sub copyrightids {
   97: 
   98: }
   99: 
  100: # ------------------------------------------------------- Copyright Description
  101: sub copyrightdescription {
  102: 
  103: }
  104: 
  105: # ------------------------------------------------------------- File Categories
  106: sub filecategories {
  107: 
  108: }
  109: 
  110: # ------------------------------------------------------------------ File Types
  111: sub fileextensions {
  112: 
  113: }
  114: 
  115: # ------------------------------------------------------------- Embedding Style
  116: sub fileembstyle {
  117: 
  118: }
  119: 
  120: # ------------------------------------------------------------ Description Text
  121: sub filedescription {
  122: 
  123: }
  124: 
  125: sub get_previous_attempt {
  126:   my ($symb,$username,$domain,$course)=@_;
  127:   my $prevattempts='';
  128:   if ($symb) {
  129:     my (%returnhash)=
  130:       &Apache::lonnet::restore($symb,$course,$domain,$username);
  131:     if ($returnhash{'version'}) {
  132:       my %lasthash=();
  133:       my $version;
  134:       for ($version=1;$version<=$returnhash{'version'};$version++) {
  135:         map {
  136: 	  $lasthash{$_}=$returnhash{$version.':'.$_};
  137:         } sort(split(/\:/,$returnhash{$version.':keys'}));
  138:       }
  139:       $prevattempts='<table border=2></tr><th>History</th>';
  140:       map {
  141:         $prevattempts.='<th>'.$_.'</th>';
  142:       } sort(keys %lasthash);
  143:       for ($version=1;$version<=$returnhash{'version'};$version++) {
  144:         $prevattempts.='</tr><tr><th>Attempt '.$version.'</th>';
  145:         map {
  146: 	  my $value;
  147: 	  if ($_ =~ /timestamp/) {
  148: 	    $value=scalar(localtime($returnhash{$version.':'.$_}));
  149: 	  } else {
  150: 	    $value=$returnhash{$version.':'.$_};
  151: 	  }
  152: 	  $prevattempts.='<td>'.$value.'</td>';   
  153:         } sort(keys %lasthash);
  154:       }
  155:       $prevattempts.='</tr><tr><th>Current</th>';
  156:       map {
  157: 	my $value;
  158: 	if ($_ =~ /timestamp/) {
  159: 	  $value=scalar(localtime($lasthash{$_}));
  160: 	} else {
  161: 	  $value=$lasthash{$_};
  162: 	}
  163: 	$prevattempts.='<td>'.$value.'</td>';
  164:       } sort(keys %lasthash);
  165:       $prevattempts.='</tr></table>';
  166:     } else {
  167:       $prevattempts='Nothing submitted - no attempts.';
  168:     }
  169:   } else {
  170:     $prevattempts='No data.';
  171:   }
  172: }
  173: 
  174: sub get_student_view {
  175:   my ($symb,$username,$domain,$courseid) = @_;
  176:   my ($map,$id,$feedurl) = split(/___/,$symb);
  177:   my (%old,%moreenv);
  178:   my @elements=('symb','courseid','domain','username');
  179:   foreach my $element (@elements) {
  180:     $old{$element}=$ENV{'form.grade_'.$element};
  181:     $moreenv{'form.grade_'.$element}=eval '$'.$element #'
  182:   }
  183:   &Apache::lonnet::appenv(%moreenv);
  184:   my $userview=&Apache::lonnet::ssi('/res/'.$feedurl);
  185:   &Apache::lonnet::delenv('form.grade_');
  186:   foreach my $element (@elements) {
  187:     $ENV{'form.grade_'.$element}=$old{$element};
  188:   }
  189:   $userview=~s/\<body[^\>]*\>//gi;
  190:   $userview=~s/\<\/body\>//gi;
  191:   $userview=~s/\<html\>//gi;
  192:   $userview=~s/\<\/html\>//gi;
  193:   $userview=~s/\<head\>//gi;
  194:   $userview=~s/\<\/head\>//gi;
  195:   $userview=~s/action\s*\=/would_be_action\=/gi;
  196:   return $userview;
  197: }
  198: 
  199: sub get_student_answers {
  200:   my ($symb,$username,$domain,$courseid) = @_;
  201:   my ($map,$id,$feedurl) = split(/___/,$symb);
  202:   my (%old,%moreenv);
  203:   my @elements=('symb','courseid','domain','username');
  204:   foreach my $element (@elements) {
  205:     $old{$element}=$ENV{'form.grade_'.$element};
  206:     $moreenv{'form.grade_'.$element}=eval '$'.$element #'
  207:   }
  208:   $moreenv{'form.grade_target'}='answer';
  209:   &Apache::lonnet::appenv(%moreenv);
  210:   my $userview=&Apache::lonnet::ssi('/res/'.$feedurl);
  211:   &Apache::lonnet::delenv('form.grade_');
  212:   foreach my $element (@elements) {
  213:     $ENV{'form.grade_'.$element}=$old{$element};
  214:   }
  215:   $userview=~s/\<body[^\>]*\>//gi;
  216:   $userview=~s/\<\/body\>//gi;
  217:   $userview=~s/\<html\>//gi;
  218:   $userview=~s/\<\/html\>//gi;
  219:   $userview=~s/\<head\>//gi;
  220:   $userview=~s/\<\/head\>//gi;
  221:   $userview=~s/action\s*\=/would_be_action\=/gi;
  222:   return $userview;
  223: }
  224: 
  225: sub get_unprocessed_cgi {
  226:   my ($query)= @_;
  227:   map {
  228:     my ($name, $value) = split(/=/,$_);
  229:     $value =~ tr/+/ /;
  230:     $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
  231:     if (!defined($ENV{'form.'.$name})) { $ENV{'form.'.$name}=$value; }
  232:   } (split(/&/,$query));
  233: }
  234: 
  235: sub cacheheader {
  236:   my $date=strftime("%a, %d %b %Y %H:%M:%S GMT",gmtime);
  237:   my $output .='<meta HTTP-EQUIV="Expires" CONTENT="'.$date.'" />
  238:                 <meta HTTP-EQUIV="Cache-control" CONTENT="no-cache" />
  239:                 <meta HTTP-EQUIV="Pragma" CONTENT="no-cache" />';
  240:   return $output;
  241: }
  242: 
  243: sub no_cache {
  244:   my ($r) = @_;
  245:   my $date=strftime("%a, %d %b %Y %H:%M:%S GMT",gmtime);
  246:   $r->no_cache(1);
  247:   $r->header_out("Pragma" => "no-cache");
  248:   $r->header_out("Expires" => $date);
  249: }
  250: 1;
  251: __END__;