--- trunk2/lib/WebPAC.pm	2004/10/10 09:33:57	499
+++ trunk2/lib/WebPAC.pm	2004/10/10 11:04:52	500
@@ -36,12 +36,18 @@
  	config_file => 'name.conf',
 	code_page => 'ISO-8859-2',
 	low_mem => 1,
+	filter => {
+		'lower' => sub { lc($_[0]) },
+	},
  );
 
 Default C<code_page> is C<ISO-8859-2>.
 
 Default is not to use C<low_mem> options (see L<MEMORY USAGE> below).
 
+There is optinal parametar C<filter> which specify different filters which
+can be applied using C<filter{name}> notation.
+
 This method will also read configuration files
 C<global.conf> (used by indexer and Web font-end)
 and configuration file specified by C<config_file>
@@ -138,6 +144,8 @@
 		$self->{'db'} = $db;
 	}
 
+	$log->debug("filters defined: ",Dumper($self->{'filter'}));
+
 	return $self;
 }
 
@@ -575,6 +583,10 @@
 	# remove eval{...} from beginning
 	$eval_code = $1 if ($format =~ s/^eval{([^}]+)}//s);
 
+	my $filter_name;
+	# remove filter{...} from beginning
+	$filter_name = $1 if ($format =~ s/^filter{([^}]+)}//s);
+
 	# do actual replacement of placeholders
 	$format =~ s/v(\d+)(?:\^(\w))?/$self->get_data(\$rec,$1,$2,$i,\$found)/ges;
 
@@ -584,6 +596,12 @@
 			my $eval = $self->fill_in($rec,$eval_code,$i);
 			return if (! $self->_eval($eval));
 		}
+		if ($filter_name && $self->{'filter'}->{$filter_name}) {
+			$log->debug("filter '$filter_name' for $format");
+			$format = $self->{'filter'}->{$filter_name}->($format);
+			return unless(defined($format));
+			$log->debug("filter result: $format");
+		}
 		# do we have lookups?
 		if ($format =~ /$LOOKUP_REGEX/o) {
 			$log->debug("format '$format' has lookup");
@@ -676,6 +694,10 @@
 	# remove eval{...} from beginning
 	$eval_code = $1 if ($format =~ s/^eval{([^}]+)}//s);
 
+	my $filter_name;
+	# remove filter{...} from beginning
+	$filter_name = $1 if ($format =~ s/^filter{([^}]+)}//s);
+
 	my $prefix;
 	my $all_found=0;
 
@@ -710,9 +732,16 @@
 
 	if ($eval_code) {
 		my $eval = $self->fill_in($rec,$eval_code,$i);
-		$log->debug("about to eval{",$eval,"} format: $out");
+		$log->debug("about to eval{$eval} format: $out");
 		return if (! $self->_eval($eval));
 	}
+	
+	if ($filter_name && $self->{'filter'}->{$filter_name}) {
+		$log->debug("about to filter{$filter_name} format: $out");
+		$out = $self->{'filter'}->{$filter_name}->($out);
+		return unless(defined($out));
+		$log->debug("filter result: $out");
+	}
 
 	return $out;
 }
@@ -1070,7 +1099,7 @@
 
 	$log->debug("eval: ",$code," [",$ret,"]");
 
-	return $ret || 0;
+	return $ret || undef;
 }
 
 =head2 _sort_by_order