--- loncom/homework/hint.pm	2000/12/19 23:22:22	1.1
+++ loncom/homework/hint.pm	2001/08/06 17:12:29	1.14
@@ -1,47 +1,136 @@
+# The LON-CAPA hint handler.
+#
+# Handles the displaying of hints.
+#
+# YEAR=2000
+# 12/19,12/21 Guy Albertelli
+# YEAR=2001
+# 1/4,1/5,1/22,2/7,2/19,3/31,4/5,4/10,5/31,6/2 Guy Albertelli
+# 8/6 Scott Harrison
+
 package Apache::hinttags; 
 
 use strict;
 use Apache::lonnet;
+use capa;
 
+# ======================================================================= BEGIN
 sub BEGIN {
-  &Apache::lonxml::register('Apache::hinttags',('hintgroup','hintpart'));
+  &Apache::lonxml::register('Apache::hinttags',('hintgroup','hintpart',
+						'numericalhint'));
 }
 
-#currently hintgroup has no purpose
+@Apache::hint::which = ();
+
+# ============================================================ Start hint group
 sub start_hintgroup {
+    my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
+    my $skiptoend = '0';
+    my $result;
+    if ($target eq 'web') {
+	my $id = $Apache::inputtags::part;
+	my $numtries = $Apache::lonhomework::history{"resource.$id.tries"};
+	if ( $numtries eq '') { $numtries = 0; }
+	my $hinttries = &Apache::lonnet::EXT("resource.$id.hinttries");
+	if ( $hinttries eq '') { $hinttries = 1; }
+	&Apache::lonxml::debug("found :$id:$numtries:$hinttries:");
+	if ( $numtries < $hinttries ) {
+	    $skiptoend = '1';
+	} else {
+	    if ($target eq 'web') {
+		$result = '<table bgcolor="#dddddd"><tr><td>';
+	    }
+	}
+    }
+    if ($skiptoend) {
+	&Apache::lonxml::get_all_text("/hintgroup",$$parser[$#$parser]);
+    }
+    @Apache::hint::which = ();
+    return $result;
 }
 
+# ============================================================== End hint group
 sub end_hintgroup {
+    my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
+    my $result;
+    if ($target eq 'web') {
+	my $id = $Apache::inputtags::part;
+	my $numtries=$Apache::lonhomework::history{"resource.$id.tries"};
+	if ( $numtries eq '') { $numtries = 0; }
+	my $hinttries=&Apache::lonnet::EXT("resource.$id.hinttries");
+	if ( $hinttries eq '') { $hinttries = 1; }
+	&Apache::lonxml::debug("found :$id:$numtries:$hinttries:");
+	if ( $numtries => $hinttries ) {
+	    if ($target eq 'web') {$result = '</td></tr></table>';}
+	}	
+    }
+    @Apache::hint::which = '';
+    return $result;
 }
 
-sub start_hintpart {
-  my ($target,$token,$parstack,$parser,$safeeval,$style)=@_;
+# ======================================================== Start numerical hint
+sub start_numericalhint {
+    #do everything in end, so intervening <responseparams> work
+    return '';
+}
 
-  my $show ='0';
-  if ($target ne 'meta' && $target ne 'grade') {
-    my $args ='';
-    if ( $#$parstack > -1 ) { $args=$$parstack[$#$parstack]; }
-    my $on = &Apache::run::run("{$args;".'return $on}',$safeeval);
-    if ( $on eq 'default') {
-      $show='1';
-    } else {
-      my (%results) = &Apache::run::run("{$args; return ".'\%'.$on,$safeeval);
-      my $key;
-      foreach $key (keys %results) {
-	&Apache::lonxml::debug("Got $key");
-      }
+# ========================================================== End numerical hint
+sub end_numericalhint {
+    my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
+    my $result;
+    if ($target eq 'web') {
+	$safeeval->share_from('capa',['&caparesponse_capa_check_answer']);
+	my $name = &Apache::lonxml::get_param('name',$parstack,$safeeval);
+	my $response = $Apache::lonhomework::history{'resource.'.
+		       $Apache::inputtags::part.'.'.
+		       $Apache::inputtags::response['-1'].'.submission'};
+	&Apache::lonxml::debug("hintgroup is using $response<br />\n");
+	my $expression = "&caparesponse_check_list('".$response."','".
+  	                 $$parstack[$#$parstack].
+	                 ';my $tol="'.$Apache::inputtags::params{'tol'}.'"'.
+	                 ';my $sig="'.$Apache::inputtags::params{'sig'}.'"'.
+		         "');";
+	$result = &Apache::run::run($expression,$safeeval);
+	&Apache::lonxml::debug("$expression:result:$result:".
+			       $Apache::lonxml::curdepth);
+	my ($awards) = split /:/, $result;
+	my ($ad) = &Apache::inputtags::finalizeawards(split /,/ , $awards);
+	if ($ad eq 'EXACT_ANS' || $ad eq 'APPROX_ANS') {
+	    push (@Apache::hint::which,$name); }
+	$result = '';
     }
-    if (!$show) {
-      &Apache::lonxml::get_all_text("/problem",$$parser[$#$parser]);
+    return $result;
+}
+
+# ======================================================= Starting part of hint
+# a part shows if it is on, if no specific parts are on, then default shows
+sub start_hintpart {
+    my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
+    my $show ='0';
+    if ($target eq 'web') {
+	my $on= &Apache::lonxml::get_param('on',$parstack,$safeeval);
+	&Apache::lonxml::debug("hintpart sees $on and ,$#Apache::hint::which");
+	if ( $on eq 'default' && $#Apache::hint::which == '-1') {
+	    $show=1;
+	} else {
+	    my $which;
+	    foreach $which (@Apache::hint::which) {
+		if ($which eq $on) { $show = 1; last } }
+	}
+	if (!$show) {
+	    &Apache::lonxml::get_all_text("/hintpart",$$parser[$#$parser]);
+	}
+    } elsif ($target eq 'grade') {
+	&Apache::lonxml::get_all_text("/hintpart",$$parser[$#$parser]);
     }
-  } else {
-    &Apache::lonxml::get_all_text("/problem",$$parser[$#$parser]);
-  }
-  return '';
+    return '';
 }
 
+# ========================================================= Ending part of hint
 sub end_hintpart {
+  return '';
 }
 
 1;
+
 __END__