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filling in contents of subroutines languageids, languagedescription,
copyrightids, copyrightdescription, filecategories, filecategorytypes,
fileextensions, fileembstyle, and filedescription -Scott Harrison

    1: # The LearningOnline Network with CAPA
    2: # a pile of common routines
    3: #
    4: # $Id: loncommon.pm,v 1.15 2001/12/11 23:38:28 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: my %fc;
   46: 
   47: # ----------------------------------------------------------------------- BEGIN
   48: sub BEGIN {
   49: # ------------------------------------------------------------------- languages
   50:     {
   51: 	my $fh=Apache::File->new($Apache::lonnet::perlvar{'lonTabDir'}.
   52: 				 '/language.tab');
   53: 	while (<$fh>) {
   54: 	    next if /^\#/;
   55: 	    chomp;
   56: 	    my ($key,$val)=(split(/\s+/,$_,2));
   57: 	    $language{$key}=$val;
   58: 	}
   59:     }
   60: # ------------------------------------------------------------------ copyrights
   61:     {
   62: 	my $fh=Apache::File->new($Apache::lonnet::perlvar{'lonTabDir'}.
   63: 				 '/copyright.tab');
   64: 	while (<$fh>) {
   65: 	    next if /^\#/;
   66: 	    chomp;
   67: 	    my ($key,$val)=(split(/\s+/,$_,2));
   68: 	    $cprtag{$key}=$val;
   69: 	}
   70:     }
   71: # ------------------------------------------------------------- file categories
   72:     {
   73: 	my $fh=Apache::File->new($Apache::lonnet::perlvar{'lonTabDir'}.
   74: 				 '/filecategories.tab');
   75: 	while (<$fh>) {
   76: 	    next if /^\#/;
   77: 	    chomp;
   78: 	    my ($key,$val)=(split(/\s+/,$_,2));
   79: 	    push @{$fc{$key}},$val;
   80: 	}
   81:     }
   82: # ------------------------------------------------------------------ file types
   83:     {
   84: 	my $fh=Apache::File->new("$perlvar{'lonTabDir'}/filetypes.tab");
   85: 	while (<$fh>) {
   86: 	    next if (/^\#/);
   87: 	    chomp;
   88: 	    my ($ending,$emb,$descr)=split(/\s+/,$_,3);
   89: 	    if ($descr ne '') { 
   90: 		$fe{$ending}=lc($emb);
   91: 		$fd{$ending}=join(' ',@descr);
   92: 	    }
   93: 	}
   94:     }
   95: }
   96: 
   97: # ---------------------------------------------------------------- Language IDs
   98: sub languageids {
   99:     return keys(%language);
  100: }
  101: 
  102: # -------------------------------------------------------- Language Description
  103: sub languagedescription {
  104:     return $language{shift};
  105: }
  106: 
  107: # --------------------------------------------------------------- Copyright IDs
  108: sub copyrightids {
  109:     return keys(%cprtag);
  110: }
  111: 
  112: # ------------------------------------------------------- Copyright Description
  113: sub copyrightdescription {
  114:     return $cprtag{shift};
  115: }
  116: 
  117: # ------------------------------------------------------------- File Categories
  118: sub filecategories {
  119:     return keys(%fc);
  120: }
  121: 
  122: # ------------------------------------------------------------- File Categories
  123: sub filecategorytypes {
  124:     return @{$fc{lc(shift)}};
  125: }
  126: 
  127: # ------------------------------------------------------------------ File Types
  128: sub fileextensions {
  129:     return keys(%fe);
  130: }
  131: 
  132: # ------------------------------------------------------------- Embedding Style
  133: sub fileembstyle {
  134:     return $fe{lc(shift)};
  135: }
  136: 
  137: # ------------------------------------------------------------ Description Text
  138: sub filedescription {
  139:     return $fd{lc(shift)};
  140: }
  141: 
  142: sub get_previous_attempt {
  143:   my ($symb,$username,$domain,$course)=@_;
  144:   my $prevattempts='';
  145:   if ($symb) {
  146:     my (%returnhash)=
  147:       &Apache::lonnet::restore($symb,$course,$domain,$username);
  148:     if ($returnhash{'version'}) {
  149:       my %lasthash=();
  150:       my $version;
  151:       for ($version=1;$version<=$returnhash{'version'};$version++) {
  152:         map {
  153: 	  $lasthash{$_}=$returnhash{$version.':'.$_};
  154:         } sort(split(/\:/,$returnhash{$version.':keys'}));
  155:       }
  156:       $prevattempts='<table border=2></tr><th>History</th>';
  157:       map {
  158:         $prevattempts.='<th>'.$_.'</th>';
  159:       } sort(keys %lasthash);
  160:       for ($version=1;$version<=$returnhash{'version'};$version++) {
  161:         $prevattempts.='</tr><tr><th>Attempt '.$version.'</th>';
  162:         map {
  163: 	  my $value;
  164: 	  if ($_ =~ /timestamp/) {
  165: 	    $value=scalar(localtime($returnhash{$version.':'.$_}));
  166: 	  } else {
  167: 	    $value=$returnhash{$version.':'.$_};
  168: 	  }
  169: 	  $prevattempts.='<td>'.$value.'</td>';   
  170:         } sort(keys %lasthash);
  171:       }
  172:       $prevattempts.='</tr><tr><th>Current</th>';
  173:       map {
  174: 	my $value;
  175: 	if ($_ =~ /timestamp/) {
  176: 	  $value=scalar(localtime($lasthash{$_}));
  177: 	} else {
  178: 	  $value=$lasthash{$_};
  179: 	}
  180: 	$prevattempts.='<td>'.$value.'</td>';
  181:       } sort(keys %lasthash);
  182:       $prevattempts.='</tr></table>';
  183:     } else {
  184:       $prevattempts='Nothing submitted - no attempts.';
  185:     }
  186:   } else {
  187:     $prevattempts='No data.';
  188:   }
  189: }
  190: 
  191: sub get_student_view {
  192:   my ($symb,$username,$domain,$courseid) = @_;
  193:   my ($map,$id,$feedurl) = split(/___/,$symb);
  194:   my (%old,%moreenv);
  195:   my @elements=('symb','courseid','domain','username');
  196:   foreach my $element (@elements) {
  197:     $old{$element}=$ENV{'form.grade_'.$element};
  198:     $moreenv{'form.grade_'.$element}=eval '$'.$element #'
  199:   }
  200:   &Apache::lonnet::appenv(%moreenv);
  201:   my $userview=&Apache::lonnet::ssi('/res/'.$feedurl);
  202:   &Apache::lonnet::delenv('form.grade_');
  203:   foreach my $element (@elements) {
  204:     $ENV{'form.grade_'.$element}=$old{$element};
  205:   }
  206:   $userview=~s/\<body[^\>]*\>//gi;
  207:   $userview=~s/\<\/body\>//gi;
  208:   $userview=~s/\<html\>//gi;
  209:   $userview=~s/\<\/html\>//gi;
  210:   $userview=~s/\<head\>//gi;
  211:   $userview=~s/\<\/head\>//gi;
  212:   $userview=~s/action\s*\=/would_be_action\=/gi;
  213:   return $userview;
  214: }
  215: 
  216: sub get_student_answers {
  217:   my ($symb,$username,$domain,$courseid) = @_;
  218:   my ($map,$id,$feedurl) = split(/___/,$symb);
  219:   my (%old,%moreenv);
  220:   my @elements=('symb','courseid','domain','username');
  221:   foreach my $element (@elements) {
  222:     $old{$element}=$ENV{'form.grade_'.$element};
  223:     $moreenv{'form.grade_'.$element}=eval '$'.$element #'
  224:   }
  225:   $moreenv{'form.grade_target'}='answer';
  226:   &Apache::lonnet::appenv(%moreenv);
  227:   my $userview=&Apache::lonnet::ssi('/res/'.$feedurl);
  228:   &Apache::lonnet::delenv('form.grade_');
  229:   foreach my $element (@elements) {
  230:     $ENV{'form.grade_'.$element}=$old{$element};
  231:   }
  232:   $userview=~s/\<body[^\>]*\>//gi;
  233:   $userview=~s/\<\/body\>//gi;
  234:   $userview=~s/\<html\>//gi;
  235:   $userview=~s/\<\/html\>//gi;
  236:   $userview=~s/\<head\>//gi;
  237:   $userview=~s/\<\/head\>//gi;
  238:   $userview=~s/action\s*\=/would_be_action\=/gi;
  239:   return $userview;
  240: }
  241: 
  242: sub get_unprocessed_cgi {
  243:   my ($query)= @_;
  244:   map {
  245:     my ($name, $value) = split(/=/,$_);
  246:     $value =~ tr/+/ /;
  247:     $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
  248:     if (!defined($ENV{'form.'.$name})) { $ENV{'form.'.$name}=$value; }
  249:   } (split(/&/,$query));
  250: }
  251: 
  252: sub cacheheader {
  253:   my $date=strftime("%a, %d %b %Y %H:%M:%S GMT",gmtime);
  254:   my $output .='<meta HTTP-EQUIV="Expires" CONTENT="'.$date.'" />
  255:                 <meta HTTP-EQUIV="Cache-control" CONTENT="no-cache" />
  256:                 <meta HTTP-EQUIV="Pragma" CONTENT="no-cache" />';
  257:   return $output;
  258: }
  259: 
  260: sub no_cache {
  261:   my ($r) = @_;
  262:   my $date=strftime("%a, %d %b %Y %H:%M:%S GMT",gmtime);
  263:   $r->no_cache(1);
  264:   $r->header_out("Pragma" => "no-cache");
  265:   $r->header_out("Expires" => $date);
  266: }
  267: 1;
  268: __END__;