Return to loncommon.pm CVS log

Up to [LON-CAPA] / loncom / interface

implementing non-network-related .tab file reading -Scott Harrison

    1: # The LearningOnline Network with CAPA
    2: # a pile of common routines
    3: #
    4: # $Id: loncommon.pm,v 1.12 2001/12/11 13:49:57 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: 	    $copyright{$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: sub get_previous_attempt {
   86:   my ($symb,$username,$domain,$course)=@_;
   87:   my $prevattempts='';
   88:   if ($symb) {
   89:     my (%returnhash)=
   90:       &Apache::lonnet::restore($symb,$course,$domain,$username);
   91:     if ($returnhash{'version'}) {
   92:       my %lasthash=();
   93:       my $version;
   94:       for ($version=1;$version<=$returnhash{'version'};$version++) {
   95:         map {
   96: 	  $lasthash{$_}=$returnhash{$version.':'.$_};
   97:         } sort(split(/\:/,$returnhash{$version.':keys'}));
   98:       }
   99:       $prevattempts='<table border=2></tr><th>History</th>';
  100:       map {
  101:         $prevattempts.='<th>'.$_.'</th>';
  102:       } sort(keys %lasthash);
  103:       for ($version=1;$version<=$returnhash{'version'};$version++) {
  104:         $prevattempts.='</tr><tr><th>Attempt '.$version.'</th>';
  105:         map {
  106: 	  my $value;
  107: 	  if ($_ =~ /timestamp/) {
  108: 	    $value=scalar(localtime($returnhash{$version.':'.$_}));
  109: 	  } else {
  110: 	    $value=$returnhash{$version.':'.$_};
  111: 	  }
  112: 	  $prevattempts.='<td>'.$value.'</td>';   
  113:         } sort(keys %lasthash);
  114:       }
  115:       $prevattempts.='</tr><tr><th>Current</th>';
  116:       map {
  117: 	my $value;
  118: 	if ($_ =~ /timestamp/) {
  119: 	  $value=scalar(localtime($lasthash{$_}));
  120: 	} else {
  121: 	  $value=$lasthash{$_};
  122: 	}
  123: 	$prevattempts.='<td>'.$value.'</td>';
  124:       } sort(keys %lasthash);
  125:       $prevattempts.='</tr></table>';
  126:     } else {
  127:       $prevattempts='Nothing submitted - no attempts.';
  128:     }
  129:   } else {
  130:     $prevattempts='No data.';
  131:   }
  132: }
  133: 
  134: sub get_student_view {
  135:   my ($symb,$username,$domain,$courseid) = @_;
  136:   my ($map,$id,$feedurl) = split(/___/,$symb);
  137:   my (%old,%moreenv);
  138:   my @elements=('symb','courseid','domain','username');
  139:   foreach my $element (@elements) {
  140:     $old{$element}=$ENV{'form.grade_'.$element};
  141:     $moreenv{'form.grade_'.$element}=eval '$'.$element #'
  142:   }
  143:   &Apache::lonnet::appenv(%moreenv);
  144:   my $userview=&Apache::lonnet::ssi('/res/'.$feedurl);
  145:   &Apache::lonnet::delenv('form.grade_');
  146:   foreach my $element (@elements) {
  147:     $ENV{'form.grade_'.$element}=$old{$element};
  148:   }
  149:   $userview=~s/\<body[^\>]*\>//gi;
  150:   $userview=~s/\<\/body\>//gi;
  151:   $userview=~s/\<html\>//gi;
  152:   $userview=~s/\<\/html\>//gi;
  153:   $userview=~s/\<head\>//gi;
  154:   $userview=~s/\<\/head\>//gi;
  155:   $userview=~s/action\s*\=/would_be_action\=/gi;
  156:   return $userview;
  157: }
  158: 
  159: sub get_student_answers {
  160:   my ($symb,$username,$domain,$courseid) = @_;
  161:   my ($map,$id,$feedurl) = split(/___/,$symb);
  162:   my (%old,%moreenv);
  163:   my @elements=('symb','courseid','domain','username');
  164:   foreach my $element (@elements) {
  165:     $old{$element}=$ENV{'form.grade_'.$element};
  166:     $moreenv{'form.grade_'.$element}=eval '$'.$element #'
  167:   }
  168:   $moreenv{'form.grade_target'}='answer';
  169:   &Apache::lonnet::appenv(%moreenv);
  170:   my $userview=&Apache::lonnet::ssi('/res/'.$feedurl);
  171:   &Apache::lonnet::delenv('form.grade_');
  172:   foreach my $element (@elements) {
  173:     $ENV{'form.grade_'.$element}=$old{$element};
  174:   }
  175:   $userview=~s/\<body[^\>]*\>//gi;
  176:   $userview=~s/\<\/body\>//gi;
  177:   $userview=~s/\<html\>//gi;
  178:   $userview=~s/\<\/html\>//gi;
  179:   $userview=~s/\<head\>//gi;
  180:   $userview=~s/\<\/head\>//gi;
  181:   $userview=~s/action\s*\=/would_be_action\=/gi;
  182:   return $userview;
  183: }
  184: 
  185: sub get_unprocessed_cgi {
  186:   my ($query)= @_;
  187:   map {
  188:     my ($name, $value) = split(/=/,$_);
  189:     $value =~ tr/+/ /;
  190:     $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
  191:     if (!defined($ENV{'form.'.$name})) { $ENV{'form.'.$name}=$value; }
  192:   } (split(/&/,$query));
  193: }
  194: 
  195: sub cacheheader {
  196:   my $date=strftime("%a, %d %b %Y %H:%M:%S GMT",gmtime);
  197:   my $output .='<meta HTTP-EQUIV="Expires" CONTENT="'.$date.'" />
  198:                 <meta HTTP-EQUIV="Cache-control" CONTENT="no-cache" />
  199:                 <meta HTTP-EQUIV="Pragma" CONTENT="no-cache" />';
  200:   return $output;
  201: }
  202: 
  203: sub no_cache {
  204:   my ($r) = @_;
  205:   my $date=strftime("%a, %d %b %Y %H:%M:%S GMT",gmtime);
  206:   $r->no_cache(1);
  207:   $r->header_out("Pragma" => "no-cache");
  208:   $r->header_out("Expires" => $date);
  209: }
  210: 1;
  211: __END__;