From 843388f82ba323965e1bff926d785a60d45f5590 Mon Sep 17 00:00:00 2001
From: Daniel Friesel <derf@finalrewind.org>
Date: Wed, 27 May 2015 08:35:32 +0200
Subject: return a delay of undef when no delay information is available

---
 Changelog                          | 6 ++++++
 lib/Travel/Status/DE/EFA.pm        | 2 +-
 lib/Travel/Status/DE/EFA/Result.pm | 4 ++--
 t/20-vrr.t                         | 2 +-
 4 files changed, 10 insertions(+), 4 deletions(-)

diff --git a/Changelog b/Changelog
index 019fde3..6a13250 100644
--- a/Changelog
+++ b/Changelog
@@ -1,3 +1,9 @@
+git HEAD
+
+    * Result->delay: return undef when no data is available. This allows to
+      distinguish between on-time departures (delay 0) and departures without
+      realtime data (delay undef)
+
 Travel::Status::DE::VRR 1.09 - Thu Apr 30 2015
 
     * EFA: Fix crash when ->results is called after a network error occured
diff --git a/lib/Travel/Status/DE/EFA.pm b/lib/Travel/Status/DE/EFA.pm
index 4883ed0..4789ccc 100644
--- a/lib/Travel/Status/DE/EFA.pm
+++ b/lib/Travel/Status/DE/EFA.pm
@@ -336,7 +336,7 @@ sub results {
 		my $info          = $e_info->textContent;
 		my $key           = $e_line->getAttribute('key');
 		my $countdown     = $e->getAttribute('countdown');
-		my $delay         = $e_info->getAttribute('delay') // 0;
+		my $delay         = $e_info->getAttribute('delay');
 		my $type          = $e_info->getAttribute('name');
 
 		my $platform_is_db = 0;
diff --git a/lib/Travel/Status/DE/EFA/Result.pm b/lib/Travel/Status/DE/EFA/Result.pm
index e0d6ad4..95e35cd 100644
--- a/lib/Travel/Status/DE/EFA/Result.pm
+++ b/lib/Travel/Status/DE/EFA/Result.pm
@@ -18,7 +18,7 @@ sub new {
 
 	my $ref = \%conf;
 
-	if ( $ref->{delay} eq '-9999' ) {
+	if ( defined $ref->{delay} and $ref->{delay} eq '-9999' ) {
 		$ref->{delay}        = 0;
 		$ref->{is_cancelled} = 1;
 	}
@@ -86,7 +86,7 @@ Actual departure date (DD.MM.YYYY).
 =item $departure->delay
 
 Expected delay from scheduled departure time in minutes. A delay of 0
-indicates either departure on time or that no delay information is available.
+indicates departure on time. undef when no realtime information is available.
 
 =item $departure->destination
 
diff --git a/t/20-vrr.t b/t/20-vrr.t
index cc710f2..66f2fe6 100644
--- a/t/20-vrr.t
+++ b/t/20-vrr.t
@@ -43,7 +43,7 @@ is($results[3]->info, decode('UTF-8', 'Ab (H) Heißen Kirche, Umstieg in den SEV
 is($results[3]->line, '18', 'fourth result: line ok');
 is($results[3]->date, '16.11.2011', 'fourth result: real date ok');
 is($results[3]->time, '09:39', 'fourth result: real time ok');
-is($results[3]->delay, 0, 'fourth result: delay 0');
+is($results[3]->delay, undef, 'fourth result: delay undef');
 is($results[3]->sched_date, '16.11.2011', 'fourth result: scheduled date ok');
 is($results[3]->sched_time, '09:39', 'fourth result: scheduled time ok');
 #is($results[3]->platform, '2', 'fourth result: platform ok');
-- 
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