From d146e44ff3a8b3304e6603a2238c40034c4b91a1 Mon Sep 17 00:00:00 2001
From: Daniel Friesel <derf@finalrewind.org>
Date: Sun, 20 Nov 2011 12:42:44 +0100
Subject: VRR.pm: Check for 'ambiguous input' error condition

---
 lib/Travel/Status/DE/VRR.pm | 44 ++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 44 insertions(+)

(limited to 'lib')

diff --git a/lib/Travel/Status/DE/VRR.pm b/lib/Travel/Status/DE/VRR.pm
index 3fe437f..3efb1e8 100644
--- a/lib/Travel/Status/DE/VRR.pm
+++ b/lib/Travel/Status/DE/VRR.pm
@@ -109,6 +109,8 @@ sub new {
 
 	$self->{tree} = XML::LibXML->load_xml( string => $self->{xml}, );
 
+	$self->check_for_ambiguous();
+
 	return $self;
 }
 
@@ -147,6 +149,48 @@ sub sprintf_time {
 	);
 }
 
+sub check_for_ambiguous {
+	my ($self) = @_;
+
+	my $xml = $self->{tree};
+
+	my $xp_place = XML::LibXML::XPathExpression->new('//itdOdv/itdOdvPlace');
+	my $xp_name  = XML::LibXML::XPathExpression->new('//itdOdv/itdOdvName');
+
+	my $xp_place_elem = XML::LibXML::XPathExpression->new('./odvPlaceElem');
+	my $xp_name_elem  = XML::LibXML::XPathExpression->new('./odvNameElem');
+
+	my $e_place = ( $xml->findnodes($xp_place) )[0];
+	my $e_name  = ( $xml->findnodes($xp_name) )[0];
+
+	if ( not( $e_place and $e_name ) ) {
+
+		# this should not happen[tm]
+		cluck('skipping ambiguity check- itdOdvPlace/itdOdvName missing');
+		return;
+	}
+
+	if ( $e_place->getAttribute('state') eq 'list' ) {
+		$self->{errstr} = sprintf(
+			'Ambiguous place input: %s',
+			join( q{ | },
+				map { $_->textContent }
+				  @{ $e_place->findnodes($xp_place_elem) } )
+		);
+		return;
+	}
+	if ( $e_name->getAttribute('state') eq 'list' ) {
+		$self->{errstr} = sprintf(
+			'Ambiguous name input: %s',
+			join( q{ | },
+				map { $_->textContent } @{ $e_name->findnodes($xp_name_elem) } )
+		);
+		return;
+	}
+
+	return;
+}
+
 sub lines {
 	my ($self) = @_;
 	my @lines;
-- 
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