--- loncom/localize/lonlocal.pm	2008/11/28 14:36:55	1.52
+++ loncom/localize/lonlocal.pm	2009/03/20 18:26:34	1.56
@@ -1,7 +1,7 @@
 # The LearningOnline Network with CAPA
 # Localization routines
 #
-# $Id: lonlocal.pm,v 1.52 2008/11/28 14:36:55 raeburn Exp $
+# $Id: lonlocal.pm,v 1.56 2009/03/20 18:26:34 bisitz Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -179,6 +179,10 @@ use vars qw($lh);
 
 # ===================================================== The "MakeText" function
 
+# ######### Localize Cache
+# my @localize_cache;
+# #########
+
 sub mt (@) {
 #    open(LOG,'>>/home/www/loncapa/loncom/localize/localize/newphrases.txt');
 #    print LOG (@_[0]."\n");
@@ -192,6 +196,18 @@ sub mt (@) {
             }
         } else {
             return $lh->maketext(@_);
+#				######### Localize Cache
+#				foreach my $e (@localize_cache)
+#				{
+#					if($_[0] eq $$e[0]) { return $$e[1]; }
+#				}
+#
+#				if($#localize_cache == 100) { pop(@localize_cache); }
+#				my $localize_entry = $lh->maketext(@_);
+#				unshift(@localize_cache, [ @_, $localize_entry ] );
+#				#########
+#            
+#	    		return $localize_entry;
         }
     } else {
 	if (wantarray) {
@@ -287,10 +303,13 @@ sub get_genlanguages {
 
 sub current_encoding {
     my $default='UTF-8';
-    if ($Apache::lonnet::env{'browser.os'} eq 'win' && 
-	$Apache::lonnet::env{'browser.type'} eq 'explorer') {
-        $default='ISO-8859-1';
-    }
+# UTF-8 character encoding needed for the whole LON-CAPA system
+# (interface language and homework problem content)
+# See Bugzilla 5702 vs. 2189 and 4067
+#    if ($Apache::lonnet::env{'browser.os'} eq 'win' && 
+#	$Apache::lonnet::env{'browser.type'} eq 'explorer') {
+#        $default='ISO-8859-1';
+#    }
     if ($lh) {
 	my $enc=$lh->maketext('char_encoding');
 	return ($enc eq 'char_encoding'?$default:$enc);
@@ -340,15 +359,24 @@ sub get_language_handle {
 
 # ========================================================== Localize localtime
 sub gettimezone {
-    my $timezone; 
-    if ($Apache::lonnet::env{'course.'.$Apache::lonnet::env{'request.course.id'}.'.timezone'}) {
-        $timezone = $Apache::lonnet::env{'course.'.$Apache::lonnet::env{'request.course.id'}.'.timezone'};    
-    } elsif ($Apache::lonnet::env{'request.course.id'} ne '') {
-        my $cdom = $Apache::lonnet::env{'course.'.$Apache::lonnet::env{'request.course.id'}.'.domain'};
-        if ($cdom ne '') {
-            my %domdefaults = &Apache::lonnet::get_domain_defaults($cdom);
-            if ($domdefaults{'timezone_def'} ne '') {
-                $timezone = $domdefaults{'timezone_def'};
+    my ($timezone) = @_;
+    if ($timezone ne '') {
+        if (!DateTime::TimeZone->is_valid_name($timezone)) {
+            $timezone = 'local';
+        }
+        return $timezone;
+    }
+    my $cid = $Apache::lonnet::env{'request.course.id'};  
+    if ($cid ne '') {
+        if ($Apache::lonnet::env{'course.'.$cid.'.timezone'}) {
+            $timezone = $Apache::lonnet::env{'course.'.$cid.'.timezone'};    
+        } else {
+            my $cdom = $Apache::lonnet::env{'course.'.$cid.'.domain'};
+            if ($cdom ne '') {
+                my %domdefaults = &Apache::lonnet::get_domain_defaults($cdom);
+                if ($domdefaults{'timezone_def'} ne '') {
+                    $timezone = $domdefaults{'timezone_def'};
+                }
             }
         }
     } elsif ($Apache::lonnet::env{'request.role.domain'} ne '') {
@@ -373,7 +401,7 @@ sub gettimezone {
 }
 
 sub locallocaltime {
-    my $thistime=shift;
+    my ($thistime,$timezone) = @_;
     if (!defined($thistime) || $thistime eq '') {
 	return &mt('Never');
     }
@@ -387,7 +415,7 @@ sub locallocaltime {
     }
 
     my $dt = DateTime->from_epoch(epoch => $thistime)
-                     ->set_time_zone(&gettimezone());
+                     ->set_time_zone(&gettimezone($timezone));
     if ((&current_language=~/^en/) || (!$lh)) {
 
 	return $dt->strftime("%a %b %e %I:%M:%S %P %Y (%Z)");