--- loncom/homework/structuretags.pm	2011/12/26 13:45:10	1.497.2.5
+++ loncom/homework/structuretags.pm	2012/04/05 09:49:51	1.503
@@ -1,7 +1,7 @@
 # The LearningOnline Network with CAPA 
 # definition of tags that give a structure to a document
 #
-# $Id: structuretags.pm,v 1.497.2.5 2011/12/26 13:45:10 foxr Exp $
+# $Id: structuretags.pm,v 1.503 2012/04/05 09:49:51 foxr Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -61,6 +61,7 @@ use Apache::lonlocal;
 use Apache::lonxml;
 use Apache::londefdef;
 use Apache::lonenc();
+use Apache::loncommon();
 use Time::HiRes qw( gettimeofday tv_interval );
 use lib '/home/httpd/lib/perl/';
 use LONCAPA;
@@ -110,6 +111,28 @@ sub select_hyphenation {
     }
 }
 ##
+# Selects hyphenation based on the current problem metadata.
+# This requires that
+# - There is a language metadata item set for the problem.
+# - The language has a latex/babel hyphenation.
+#
+# @note: Uses &Apache::lonxml::request to locate the Uri associated with
+#        this problem.
+# @return string (possibly empty).
+# @retval If not empty an appropriate \selectlanguage{} directive.
+#
+sub select_metadata_hyphenation {
+    my $uri      = $Apache::lonxml::request->uri;
+    my $language = &Apache::lonnet::metadata($uri, 'language'); 
+    my $latex_language = &Apache::loncommon::latexhyphenation($language);
+    if ($latex_language) {
+	return '\selectlanguage{'.$latex_language."}\n";
+    }
+    return '';			# no latex hyphenation or no lang metadata.
+}
+
+
+##
 #  Clears the set of languages required by the document being rendered.
 #
 sub clear_required_languages {
@@ -1037,6 +1060,9 @@ sub reset_problem_globals {
     undef(%Apache::lonhomework::history);
     undef(%Apache::lonhomework::results);
     undef($Apache::inputtags::part);
+    if ($type eq 'Task') {
+        undef($Apache::inputtags::slot_name);
+    }
 #don't undef this, lonhomework.pm takes care of this, we use this to 
 #detect if we try to do 2 problems in one file
 #   undef($Apache::lonhomework::parsing_a_problem);
@@ -1153,7 +1179,13 @@ sub start_problem {
 	    my @interval=&Apache::lonnet::EXT("resource.0.interval");
 	    &Apache::lonnet::set_first_access($interval[1]);
 	}
+	my $resource_due =  &Apache::lonhomework::due_date(0, $env{'request.symb'});
+	my $time_left = $resource_due - time();
+	if ($resource_due && ($time_left > 0) && ($target eq 'web')) {
+	    $result .= &Apache::lonhtmlcommon::set_due_date($resource_due);
+	}
 
+	    
         ($status,$accessmsg,my $slot_name,my $slot) =
             &Apache::lonhomework::check_slot_access('0','problem');
         push (@Apache::inputtags::status,$status);
@@ -1206,6 +1238,9 @@ sub start_problem {
 	    ( $status eq 'BANNED') ||
 	    ( $status eq 'UNAVAILABLE') ||
 	    ( $status eq 'NOT_IN_A_SLOT') ||
+            ( $status eq 'NOTRESERVABLE') ||
+            ( $status eq 'RESERVABLE') ||
+            ( $status eq 'RESERVABLE_LATER') ||
 	    ( $status eq 'INVALID_ACCESS')) {
 	    my $bodytext=&Apache::lonxml::get_all_text("/problem",$parser,
 						       $style);
@@ -1215,9 +1250,12 @@ sub start_problem {
 		    $msg.='<h1>'.&mt('Unable to determine if this resource is open due to network problems. Please try again later.').'</h1>';
                 } elsif ($status eq 'NOT_IN_A_SLOT') {
                     $msg.='<h1>'.&mt('You are not currently signed up to work at this time and/or place.').'</h1>';
+                } elsif (($status eq 'RESERVABLE') || ($status eq 'RESERVABLE_LATER') ||
+                         ($status eq 'NOTRESERVABLE')) {
+                    $msg.='<h1>'.&mt('Access requires reservation to work at specific time/place.').'</h1>';
 		} elsif ($status ne 'NOT_YET_VIEWED') {
 		    $msg.='<h1>'.&mt('Not open to be viewed').'</h1>';
-		}
+                }
 		if ($status eq 'CLOSED' || $status eq 'INVALID_ACCESS') {
 		    $msg.=&mt('The problem ').$accessmsg;
 		} elsif ($status eq 'UNCHECKEDOUT') {
@@ -1226,6 +1264,16 @@ sub start_problem {
 		    $msg.=&firstaccess_msg($accessmsg,$symb);
 		} elsif ($status eq 'NOT_IN_A_SLOT') {
 		    $msg.=&Apache::bridgetask::add_request_another_attempt_button("Sign up for time to work");
+                } elsif ($status eq 'RESERVABLE') {
+                    $msg.=&mt('Available to make a reservation.').' '.&mt('Reservation window closes [_1].',
+                              &Apache::lonnavmaps::timeToHumanString($accessmsg,'end')).
+                          '<br />'.
+                          &Apache::bridgetask::add_request_another_attempt_button("Sign up for time to work");
+                } elsif ($status eq 'RESERVABLE_LATER') {
+                    $msg.=&mt('Window to make a reservation will open [_1].',
+                              &Apache::lonnavmaps::timeToHumanString($accessmsg,'start'));
+                } elsif ($status eq 'NOTRESERVABLE') {
+                    $msg.=&mt('Not available to make a reservation.');  
 		}
 		$result.=$msg.'<br />';
 	    } elsif ($target eq 'tex') {
@@ -1286,6 +1334,8 @@ sub start_problem {
             }
 	} elsif ($target eq 'tex') {
 	    $result .= 'INSERTTEXFRONTMATTERHERE';
+	    $result .= &select_metadata_hyphenation();
+	    
 
 	}
     } elsif ($target eq 'edit') {
@@ -1491,6 +1541,14 @@ sub end_problem {
 
     &reset_problem_globals('problem');
 
+    #
+    # This shouild be just above the return so that the
+    # time put in the javascript is as late as possible in the
+    # computation:
+    #
+    if ($target eq 'web') {
+        $result .= &Apache::lonhtmlcommon::set_compute_end_time();
+    }
     return $result;
 }
 
@@ -1799,6 +1857,9 @@ sub end_languageblock {
 		$result = &select_hyphenation($which);
 	    }
 	    $result .= $available_texts{$which};
+	    if ($target eq 'tex') {
+		$result .= &select_metadata_hyphenation(); # Restore original language.
+	    }
 	}
 	undef(%available_texts);
 	&Apache::lonxml::deregister('Apache::structuretags',('lang'));