--- loncom/interface/loncommon.pm	2001/07/26 15:50:25	1.2
+++ loncom/interface/loncommon.pm	2001/11/29 23:16:29	1.10
@@ -1,5 +1,30 @@
-# The LearningOnline Network
+# The LearningOnline Network with CAPA
 # a pile of common routines
+#
+# $Id: loncommon.pm,v 1.10 2001/11/29 23:16:29 albertel 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/
+#
 # 2/13 Guy Albertelli
 
 # Makes a table out of the previous attempts
@@ -8,6 +33,7 @@
 package Apache::loncommon;
 
 use strict;
+use POSIX qw(strftime);
 use Apache::Constants qw(:common);
 use Apache::lonmsg();
 
@@ -15,37 +41,42 @@ sub get_previous_attempt {
   my ($symb,$username,$domain,$course)=@_;
   my $prevattempts='';
   if ($symb) {
-    my $answer=&Apache::lonnet::reply(
-				      "restore:".$domain.':'.$username.':'.$course.':'.
-				      &Apache::lonnet::escape($symb));
-    my %returnhash=();
-    map {
-      my ($name,$value)=split(/\=/,$_);
-      $returnhash{&Apache::lonnet::unescape($name)}=
-	&Apache::lonnet::unescape($value);
-    } split(/\&/,$answer);
+    my (%returnhash)=
+      &Apache::lonnet::restore($symb,$course,$domain,$username);
     if ($returnhash{'version'}) {
       my %lasthash=();
       my $version;
       for ($version=1;$version<=$returnhash{'version'};$version++) {
         map {
 	  $lasthash{$_}=$returnhash{$version.':'.$_};
-        } split(/\:/,$returnhash{$version.':keys'});
+        } sort(split(/\:/,$returnhash{$version.':keys'}));
       }
       $prevattempts='<table border=2></tr><th>History</th>';
       map {
         $prevattempts.='<th>'.$_.'</th>';
-      } keys %lasthash;
+      } sort(keys %lasthash);
       for ($version=1;$version<=$returnhash{'version'};$version++) {
         $prevattempts.='</tr><tr><th>Attempt '.$version.'</th>';
         map {
-	  $prevattempts.='<td>'.$returnhash{$version.':'.$_}.'</td>';   
-        } keys %lasthash;
+	  my $value;
+	  if ($_ =~ /timestamp/) {
+	    $value=scalar(localtime($returnhash{$version.':'.$_}));
+	  } else {
+	    $value=$returnhash{$version.':'.$_};
+	  }
+	  $prevattempts.='<td>'.$value.'</td>';   
+        } sort(keys %lasthash);
       }
       $prevattempts.='</tr><tr><th>Current</th>';
       map {
-        $prevattempts.='<td>'.$lasthash{$_}.'</td>';
-      } keys %lasthash;
+	my $value;
+	if ($_ =~ /timestamp/) {
+	  $value=scalar(localtime($lasthash{$_}));
+	} else {
+	  $value=$lasthash{$_};
+	}
+	$prevattempts.='<td>'.$value.'</td>';
+      } sort(keys %lasthash);
       $prevattempts.='</tr></table>';
     } else {
       $prevattempts='Nothing submitted - no attempts.';
@@ -55,5 +86,55 @@ 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 $userview;
+}
+
+sub get_unprocessed_cgi {
+  my ($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__;