--- loncom/homework/lonhomework.pm	2000/12/04 22:08:57	1.18
+++ loncom/homework/lonhomework.pm	2001/01/11 15:25:46	1.32
@@ -1,6 +1,7 @@
 # The LON-CAPA Homework handler
 # Guy Albertelli
 # 11/30 Gerd Kortemeyer
+# 6/1 Gerd Kortemeyer
 
 package Apache::lonhomework;
 use strict;
@@ -10,7 +11,9 @@ use Apache::lonnet;
 use Apache::inputtags;
 use Apache::structuretags;
 use Apache::response;
-
+use Apache::hint;
+use Apache::outputtags;
+use Apache::Constants qw(:common);
 
 sub get_target {
   if ( $ENV{'request.state'} eq "published") {
@@ -27,7 +30,9 @@ sub get_target {
 	return ('web');
       }
     } else {
-      return ('edit');
+      #return ('edit');
+      #edit is currently broken
+      return ('web');
     }
   }
   return ();
@@ -52,10 +57,67 @@ sub send_footer {
   $request->print(&Apache::lontexconvert::footer());
 }
 
+#@Apache::lonhomework::date_status=();
+#@Apache::lonhomework::date_msg=();
+sub check_date {
+  my ($id) = @_;
+  my $date ='';
+  my $status = '';
+  my $datemsg = '';
+  my $lastdate = '';
+  my $temp;
+  my $type;
+  my $passed;
+  &Apache::lonxml::debug("checking for part :$id:");
+  foreach $temp ("opendate","duedate","answerdate") {
+    $lastdate = $date;
+    $date = &Apache::lonnet::EXT("resource.$id.$temp");
+    &Apache::lonxml::debug("found :$date: for :$temp:");
+    if ($date eq '') {
+      $date = "an unknown date"; $passed = 0;
+    } elsif ($date eq 'con_lost') {
+      $date = "an indeterminate date"; $passed = 0;
+    } else {
+      if (time < $date) { $passed = 0; } else { $passed = 1; }
+      $date = localtime $date;
+    }
+    if (!$passed) { $type=$temp; last; }
+  }
+  &Apache::lonxml::debug("have :$type:$passed:");
+  if ($passed) {
+    $status='SHOW_ANSWER';
+    $datemsg=$date;
+  } elsif ($type eq 'opendate') {
+    $status='CLOSED';
+    $datemsg = "will open on $date";
+  } elsif ($type eq 'duedate') {
+    $status='CAN_ANSWER';
+    $datemsg = "is due at $date";
+  } elsif ($type eq 'answerdate') {
+    $status='CLOSED';
+    $datemsg = "was due on $lastdate, and answers will be available on $date";
+  }
+  if ($status eq 'CAN_ANSWER') {
+    #check #tries
+    my $tries = $Apache::lonhomework::history{"resource.$id.tries"};
+    my $maxtries = &Apache::lonnet::EXT("resource.$id.maxtries");
+    if ( $tries eq '' ) { $tries = '0'; }
+    if ( $maxtries eq '' ) { $maxtries = '2'; } 
+    if ($tries >= $maxtries) { $status = 'CANNOT_ANSWER'; } 
+  }
+  &Apache::lonxml::debug("sending back :$status:$datemsg:");
+  if ($ENV{'request.state'} eq "construct") {
+    &Apache::lonxml::debug("in construction ignoring dates");
+    $status='CAN_ANSWER';
+    $datemsg='is in under construction';
+  }
+  return ($status,$datemsg);
+}
+
 sub handler {
   my $request=$_[0];
 
-  $Apache::lonxml::debug=1;
+  if ( $ENV{'user.name'} eq 'albertel' ) { $Apache::lonxml::debug=1; }
   
   my (@targets) = &get_target();
 
@@ -65,10 +127,12 @@ sub handler {
     $request->content_type('text/html');
   }
   $request->send_http_header;
-  return 'OK' if $request->header_only;
+  return OK if $request->header_only;
   
   &Apache::lonhomework::send_header($request);
   
+  #check if allowed to see
+  
   foreach my $target (@targets) {
     my $file=&Apache::lonnet::filelocation("",$request->uri);
     my $problem=&Apache::lonnet::getfile($file);
@@ -85,7 +149,9 @@ sub handler {
     #ignore error conditions
     my ($temp)=keys %Apache::lonhomework::history ;
     if ($temp =~ m/^error:.*/) { %Apache::lonhomework::history=(); } 
-    
+    if ($target eq 'web' && &Apache::lonnet::symbread() eq '') {
+      $request->print("Vieiwing this problem as not a student, submissions will be ignored.");
+    }
     if ($target eq 'grade') {
       my $resultkey;
       foreach $resultkey (sort keys %Apache::lonhomework::history) {
@@ -98,11 +164,6 @@ sub handler {
       &Apache::lonxml::error("<b>Unable to find <i>default_homework.lcpm</i></b>");
       $default='';
     }
-    if ( $target eq 'grade') { 
-      $Apache::lonxml::textredirection = 0; 
-    } else {
-      $Apache::lonxml::textredirection = 1; 
-    }
     $result = &Apache::lonxml::xmlparse($target, $problem,
 			$default.&setup_vars($target),%mystyle);
 
@@ -110,6 +171,7 @@ sub handler {
     $request->print($result);
     #$request->print(":Result ends");
     if ($target eq 'grade') {
+
       my $resultkey;
       foreach $resultkey (sort keys %Apache::lonhomework::results) {
 	&Apache::lonxml::debug("$resultkey ---- $Apache::lonhomework::results{$resultkey}");
@@ -124,7 +186,7 @@ sub handler {
   }
   &Apache::lonhomework::send_footer($request);
   
-  return 'OK';
+  return OK;
 
 }