--- loncom/interface/loncommon.pm	2001/09/13 19:59:33	1.5
+++ loncom/interface/loncommon.pm	2001/12/11 13:49:57	1.12
@@ -1,6 +1,33 @@
-# The LearningOnline Network
+# The LearningOnline Network with CAPA
 # a pile of common routines
-# 2/13 Guy Albertelli
+#
+# $Id: loncommon.pm,v 1.12 2001/12/11 13:49:57 harris41 Exp $
+#
+# Copyright Michigan State University Board of Trustees
+#
+# This file is part of the LearningOnline Network with CAPA (LON-CAPA).
+#
+# LON-CAPA is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+#
+# LON-CAPA is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with LON-CAPA; if not, write to the Free Software
+# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+#
+# /home/httpd/html/adm/gpl.txt
+#
+# http://www.lon-capa.org/
+#
+# YEAR=2001
+# 2/13-12/7 Guy Albertelli
+# 12/11 Scott Harrison
 
 # Makes a table out of the previous attempts
 # Inputs result_from_symbread, user, domain, course_id
@@ -8,9 +35,53 @@
 package Apache::loncommon;
 
 use strict;
+use POSIX qw(strftime);
 use Apache::Constants qw(:common);
 use Apache::lonmsg();
 
+my %language;
+my %cprtag;
+my %fe; my %fd;
+
+# ----------------------------------------------------------------------- BEGIN
+sub BEGIN {
+# ------------------------------------------------------------------- languages
+    {
+	my $fh=Apache::File->new($Apache::lonnet::perlvar{'lonTabDir'}.
+				 '/language.tab');
+	while (<$fh>) {
+	    next if /^\#/;
+	    chomp;
+	    my ($key,$val)=(split(/\s+/,$_,2));
+	    $language{$key}=$val;
+	}
+    }
+# ------------------------------------------------------------------ copyrights
+    {
+	my $fh=Apache::File->new($Apache::lonnet::perlvar{'lonTabDir'}.
+				 '/copyright.tab');
+	while (<$fh>) {
+	    next if /^\#/;
+	    chomp;
+	    my ($key,$val)=(split(/\s+/,$_,2));
+	    $copyright{$key}=$val;
+	}
+    }
+# ------------------------------------------------------------------ file types
+    {
+	my $fh=Apache::File->new("$perlvar{'lonTabDir'}/filetypes.tab");
+	while (<$fh>) {
+	    next if (/^\#/);
+	    chomp;
+	    my ($ending,$emb,$descr)=split(/\s+/,$_,3);
+	    if ($descr ne '') { 
+		$fe{$ending}=lc($emb);
+		$fd{$ending}=join(' ',@descr);
+	    }
+	}
+    }
+}
+
 sub get_previous_attempt {
   my ($symb,$username,$domain,$course)=@_;
   my $prevattempts='';
@@ -60,5 +131,81 @@ sub get_previous_attempt {
   }
 }
 
+sub get_student_view {
+  my ($symb,$username,$domain,$courseid) = @_;
+  my ($map,$id,$feedurl) = split(/___/,$symb);
+  my (%old,%moreenv);
+  my @elements=('symb','courseid','domain','username');
+  foreach my $element (@elements) {
+    $old{$element}=$ENV{'form.grade_'.$element};
+    $moreenv{'form.grade_'.$element}=eval '$'.$element #'
+  }
+  &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};
+  }
+  $userview=~s/\<body[^\>]*\>//gi;
+  $userview=~s/\<\/body\>//gi;
+  $userview=~s/\<html\>//gi;
+  $userview=~s/\<\/html\>//gi;
+  $userview=~s/\<head\>//gi;
+  $userview=~s/\<\/head\>//gi;
+  $userview=~s/action\s*\=/would_be_action\=/gi;
+  return $userview;
+}
+
+sub get_student_answers {
+  my ($symb,$username,$domain,$courseid) = @_;
+  my ($map,$id,$feedurl) = split(/___/,$symb);
+  my (%old,%moreenv);
+  my @elements=('symb','courseid','domain','username');
+  foreach my $element (@elements) {
+    $old{$element}=$ENV{'form.grade_'.$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};
+  }
+  $userview=~s/\<body[^\>]*\>//gi;
+  $userview=~s/\<\/body\>//gi;
+  $userview=~s/\<html\>//gi;
+  $userview=~s/\<\/html\>//gi;
+  $userview=~s/\<head\>//gi;
+  $userview=~s/\<\/head\>//gi;
+  $userview=~s/action\s*\=/would_be_action\=/gi;
+  return $userview;
+}
+
+sub get_unprocessed_cgi {
+  my ($query)= @_;
+  map {
+    my ($name, $value) = split(/=/,$_);
+    $value =~ tr/+/ /;
+    $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
+    if (!defined($ENV{'form.'.$name})) { $ENV{'form.'.$name}=$value; }
+  } (split(/&/,$query));
+}
+
+sub cacheheader {
+  my $date=strftime("%a, %d %b %Y %H:%M:%S GMT",gmtime);
+  my $output .='<meta HTTP-EQUIV="Expires" CONTENT="'.$date.'" />
+                <meta HTTP-EQUIV="Cache-control" CONTENT="no-cache" />
+                <meta HTTP-EQUIV="Pragma" CONTENT="no-cache" />';
+  return $output;
+}
+
+sub no_cache {
+  my ($r) = @_;
+  my $date=strftime("%a, %d %b %Y %H:%M:%S GMT",gmtime);
+  $r->no_cache(1);
+  $r->header_out("Pragma" => "no-cache");
+  $r->header_out("Expires" => $date);
+}
 1;
 __END__;