From f40128dedfd431e91960e1271f1a677369941058 Mon Sep 17 00:00:00 2001
From: Birte Kristina Friesel <derf@finalrewind.org>
Date: Tue, 2 Apr 2024 17:04:25 +0200
Subject: Convert non-local timestamps to local time zone

---
 lib/Travel/Routing/DE/HAFAS/Connection.pm         | 38 ++++++++++++++---------
 lib/Travel/Routing/DE/HAFAS/Connection/Section.pm | 38 ++++++++++++++---------
 lib/Travel/Routing/DE/HAFAS/Utils.pm              | 10 ++++++
 3 files changed, 58 insertions(+), 28 deletions(-)

diff --git a/lib/Travel/Routing/DE/HAFAS/Connection.pm b/lib/Travel/Routing/DE/HAFAS/Connection.pm
index 5ccf498..05341cc 100644
--- a/lib/Travel/Routing/DE/HAFAS/Connection.pm
+++ b/lib/Travel/Routing/DE/HAFAS/Connection.pm
@@ -62,20 +62,30 @@ sub new {
 	);
 
 	# dProgType/aProgType: CORRECTED oder PROGNOSED
-	my $sched_dep = $connection->{dep}{dTimeS};
-	my $rt_dep    = $connection->{dep}{dTimeR};
-	my $sched_arr = $connection->{arr}{aTimeS};
-	my $rt_arr    = $connection->{arr}{aTimeR};
-
-	for my $ts ( $sched_dep, $rt_dep, $sched_arr, $rt_arr ) {
-		if ($ts) {
-			$ts = handle_day_change(
-				date     => $date,
-				time     => $ts,
-				strp_obj => $strptime,
-			);
-		}
-	}
+	my $sched_dep = handle_day_change(
+		date     => $date,
+		time     => $connection->{dep}{dTimeS},
+		offset   => $connection->{dep}{dTZOffset},
+		strp_obj => $strptime,
+	);
+	my $rt_dep = handle_day_change(
+		date     => $date,
+		time     => $connection->{dep}{dTimeR},
+		offset   => $connection->{dep}{dTZOffset},
+		strp_obj => $strptime,
+	);
+	my $sched_arr = handle_day_change(
+		date     => $date,
+		time     => $connection->{arr}{aTimeS},
+		offset   => $connection->{arr}{aTZOffset},
+		strp_obj => $strptime,
+	);
+	my $rt_arr = handle_day_change(
+		date     => $date,
+		time     => $connection->{arr}{aTimeR},
+		offset   => $connection->{arr}{aTZOffset},
+		strp_obj => $strptime,
+	);
 
 	my @sections;
 	for my $sec (@secL) {
diff --git a/lib/Travel/Routing/DE/HAFAS/Connection/Section.pm b/lib/Travel/Routing/DE/HAFAS/Connection/Section.pm
index 552401b..09032af 100644
--- a/lib/Travel/Routing/DE/HAFAS/Connection/Section.pm
+++ b/lib/Travel/Routing/DE/HAFAS/Connection/Section.pm
@@ -58,20 +58,30 @@ sub new {
 		time_zone => 'Europe/Berlin'
 	);
 
-	my $sched_dep = $sec->{dep}{dTimeS};
-	my $rt_dep    = $sec->{dep}{dTimeR};
-	my $sched_arr = $sec->{arr}{aTimeS};
-	my $rt_arr    = $sec->{arr}{aTimeR};
-
-	for my $ts ( $sched_dep, $rt_dep, $sched_arr, $rt_arr ) {
-		if ($ts) {
-			$ts = handle_day_change(
-				date     => $date,
-				time     => $ts,
-				strp_obj => $strptime,
-			);
-		}
-	}
+	my $sched_dep = handle_day_change(
+		date     => $date,
+		time     => $sec->{dep}{dTimeS},
+		offset   => $sec->{dep}{dTZOffset},
+		strp_obj => $strptime,
+	);
+	my $rt_dep = handle_day_change(
+		date     => $date,
+		time     => $sec->{dep}{dTimeR},
+		offset   => $sec->{dep}{dTZOffset},
+		strp_obj => $strptime,
+	);
+	my $sched_arr = handle_day_change(
+		date     => $date,
+		time     => $sec->{arr}{aTimeS},
+		offset   => $sec->{arr}{aTZOffset},
+		strp_obj => $strptime,
+	);
+	my $rt_arr = handle_day_change(
+		date     => $date,
+		time     => $sec->{arr}{aTimeR},
+		offset   => $sec->{arr}{aTZOffset},
+		strp_obj => $strptime,
+	);
 
 	my $tco = {};
 	for my $tco_id ( @{ $sec->{jny}{dTrnCmpSX}{tcocX} // [] } ) {
diff --git a/lib/Travel/Routing/DE/HAFAS/Utils.pm b/lib/Travel/Routing/DE/HAFAS/Utils.pm
index 5b26555..45ee5db 100644
--- a/lib/Travel/Routing/DE/HAFAS/Utils.pm
+++ b/lib/Travel/Routing/DE/HAFAS/Utils.pm
@@ -13,8 +13,13 @@ sub handle_day_change {
 	my (%opt)       = @_;
 	my $datestr     = $opt{date};
 	my $timestr     = $opt{time};
+	my $tz_offset   = $opt{offset};
 	my $offset_days = 0;
 
+	if ( not defined $timestr ) {
+		return;
+	}
+
 	# timestr may include a day offset, resulting in DDHHMMSS
 	if ( length($timestr) == 8 ) {
 		$offset_days = substr( $timestr, 0, 2, q{} );
@@ -26,6 +31,11 @@ sub handle_day_change {
 		$ts->add( days => $offset_days );
 	}
 
+	if ( defined $tz_offset and $tz_offset != $ts->offset / 60 ) {
+		my $ts_offset = $tz_offset - $ts->offset / 60;
+		$ts->subtract( minutes => $ts_offset );
+	}
+
 	return $ts;
 }
 
-- 
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