--- loncom/localize/lonlocal.pm	2008/07/02 21:31:32	1.47
+++ loncom/localize/lonlocal.pm	2008/11/28 14:36:55	1.52
@@ -1,7 +1,7 @@
 # The LearningOnline Network with CAPA
 # Localization routines
 #
-# $Id: lonlocal.pm,v 1.47 2008/07/02 21:31:32 raeburn Exp $
+# $Id: lonlocal.pm,v 1.52 2008/11/28 14:36:55 raeburn Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -166,11 +166,12 @@ use locale;
 use POSIX qw(locale_h strftime);
 use DateTime();
 use DateTime::TimeZone;
+use DateTime::Locale;
 
 require Exporter;
 
 our @ISA = qw (Exporter);
-our @EXPORT = qw(mt mtn ns);
+our @EXPORT = qw(mt mtn ns mt_user);
 
 # ========================================================= The language handle
 
@@ -201,6 +202,27 @@ sub mt (@) {
     }
 }
 
+sub mt_user {
+    my ($user_lh,@what) = @_;
+    if ($user_lh) {
+        if ($what[0] eq '') {
+            if (wantarray) {
+                return @what;
+            } else {
+                return $what[0];
+            }
+        } else {
+            return $user_lh->maketext(@what);
+        }
+    } else {
+        if (wantarray) {
+            return @what;
+        } else {
+            return $what[0];
+        }
+    }
+}
+
 # ============================================================== What language?
 
 sub current_language {
@@ -211,6 +233,56 @@ sub current_language {
     return 'en';
 }
 
+sub preferred_languages {
+    my @languages=();
+    if (($Apache::lonnet::env{'request.role.adv'}) && ($Apache::lonnet::env{'form.languages'})) {
+        @languages=(@languages,split(/\s*(\,|\;|\:)\s*/,$Apache::lonnet::env{'form.languages'}));
+    }
+    if ($Apache::lonnet::env{'course.'.$Apache::lonnet::env{'request.course.id'}.'.languages'}) {
+        @languages=(@languages,split(/\s*(\,|\;|\:)\s*/,
+                 $Apache::lonnet::env{'course.'.$Apache::lonnet::env{'request.course.id'}.'.languages'}));
+    }
+
+    if ($Apache::lonnet::env{'environment.languages'}) {
+        @languages=(@languages,
+                    split(/\s*(\,|\;|\:)\s*/,$Apache::lonnet::env{'environment.languages'}));
+    }
+    my $browser=$ENV{'HTTP_ACCEPT_LANGUAGE'};
+    if ($browser) {
+        my @browser =
+            map { (split(/\s*;\s*/,$_))[0] } (split(/\s*,\s*/,$browser));
+        push(@languages,@browser);
+    }
+
+    foreach my $domtype ($Apache::lonnet::env{'user.domain'},$Apache::lonnet::env{'request.role.domain'},
+                         $Apache::lonnet::perlvar{'lonDefDomain'}) {
+        if ($domtype ne '') {
+            my %domdefs = &Apache::lonnet::get_domain_defaults($domtype);
+            if ($domdefs{'lang_def'} ne '') {
+                push(@languages,$domdefs{'lang_def'});
+            }
+        }
+    }
+    return &get_genlanguages(@languages);
+}
+
+sub get_genlanguages {
+    my (@languages) = @_;
+# turn "en-ca" into "en-ca,en"
+    my @genlanguages;
+    foreach my $lang (@languages) {
+        unless ($lang=~/\w/) { next; }
+        push(@genlanguages,$lang);
+        if ($lang=~/(\-|\_)/) {
+            push(@genlanguages,(split(/(\-|\_)/,$lang))[0]);
+        }
+    }
+    #uniqueify the languages list
+    my %count;
+    @genlanguages = map { $count{$_}++ == 0 ? $_ : () } @genlanguages;
+    return @genlanguages;
+}
+
 # ============================================================== What encoding?
 
 sub current_encoding {
@@ -257,7 +329,7 @@ sub get_language_handle {
 	my $headers=$r->headers_in;
 	$ENV{'HTTP_ACCEPT_LANGUAGE'}=$headers->{'Accept-language'};
     }
-    my @languages=&Apache::loncommon::preferred_languages;
+    my @languages=&preferred_languages();
     $ENV{'HTTP_ACCEPT_LANGUAGE'}='';
     $lh=Apache::localize->get_handle(@languages);
     if ($r) {
@@ -279,6 +351,18 @@ sub gettimezone {
                 $timezone = $domdefaults{'timezone_def'};
             }
         }
+    } elsif ($Apache::lonnet::env{'request.role.domain'} ne '') {
+        my %uroledomdefs = 
+            &Apache::lonnet::get_domain_defaults($Apache::lonnet::env{'request.role.domain'});
+        if ($uroledomdefs{'timezone_def'} ne '') {
+            $timezone = $uroledomdefs{'timezone_def'};
+        }
+    } elsif ($Apache::lonnet::env{'user.domain'} ne '') {
+        my %udomdefaults = 
+            &Apache::lonnet::get_domain_defaults($Apache::lonnet::env{'user.domain'});
+        if ($udomdefaults{'timezone_def'} ne '') {
+            $timezone = $udomdefaults{'timezone_def'};
+        }
     }
     if ($timezone ne '') {
         if (DateTime::TimeZone->is_valid_name($timezone)) {
@@ -345,12 +429,50 @@ sub locallocaltime {
     }
 }
 
-# ==================== Normalize string (reduce fragility in the lexicon files)
+sub getdatelocale {
+    my ($datelocale,$locale_obj);
+    if ($Apache::lonnet::env{'course.'.$Apache::lonnet::env{'request.course.id'}.'.datelocale'}) {
+        $datelocale = $Apache::lonnet::env{'course.'.$Apache::lonnet::env{'request.course.id'}.'.datelocale'};
+    } 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{'datelocale_def'} ne '') {
+                $datelocale = $domdefaults{'datelocale_def'};
+            }
+        }
+    } elsif ($Apache::lonnet::env{'user.domain'} ne '') {
+        my %udomdefaults = &Apache::lonnet::get_domain_defaults($Apache::lonnet::env{'user.domain'});
+        if ($udomdefaults{'datelocale_def'} ne '') {
+            $datelocale = $udomdefaults{'datelocale_def'};
+        }
+    }
+    if ($datelocale ne '') {
+        eval {
+            $locale_obj = DateTime::Locale->load($datelocale);
+        };
+        if (!$@) {
+            if ($locale_obj->id() eq $datelocale) {
+                return $locale_obj;
+            }
+        }
+    }
+    return $locale_obj;
+}
+
+=pod 
+
+=item * normalize_string
+
+Normalize string (reduce fragility in the lexicon files)
+
+This normalizes a string to reduce fragility in the lexicon files of
+huge messages (such as are used by the helper), and allow useful
+formatting: reduce all consecutive whitespace to a single space,
+and remove all HTML
+
+=cut
 
-# This normalizes a string to reduce fragility in the lexicon files of
-# huge messages (such as are used by the helper), and allow useful
-# formatting: reduce all consecutive whitespace to a single space,
-# and remove all HTML
 sub normalize_string {
     my $s = shift;
     $s =~ s/\s+/ /g;
@@ -361,13 +483,27 @@ sub normalize_string {
     return $s;
 }
 
-# alias for normalize_string; recommend using it only in the lexicon
+=pod 
+
+=item * ns
+
+alias for normalize_string; recommend using it only in the lexicon
+
+=cut
+
 sub ns {
     return normalize_string(@_);
 }
 
-# mtn: call the mt function and the normalization function easily.
-# Returns original non-normalized string if there was no translation
+=pod
+
+=item * mtn
+
+mtn: call the mt function and the normalization function easily.
+Returns original non-normalized string if there was no translation
+
+=cut
+
 sub mtn (@) {
     my @args = @_; # don't want to modify caller's string; if we
 		   # didn't care about that we could set $_[0]