From b1348c7d4a4f8432859c36217d87b20fdc359cb2 Mon Sep 17 00:00:00 2001
From: Daniel Friesel <derf@finalrewind.org>
Date: Sun, 11 Oct 2020 19:38:01 +0200
Subject: move in_transit queries to an InTransit model class

---
 lib/Travelynx/Helper/IRIS.pm | 37 +++++++++++++++++++++++++++++++++++++
 1 file changed, 37 insertions(+)

(limited to 'lib/Travelynx/Helper')

diff --git a/lib/Travelynx/Helper/IRIS.pm b/lib/Travelynx/Helper/IRIS.pm
index 3b98a51..a8ca6c3 100644
--- a/lib/Travelynx/Helper/IRIS.pm
+++ b/lib/Travelynx/Helper/IRIS.pm
@@ -68,4 +68,41 @@ sub get_departures {
 	}
 }
 
+sub route_diff {
+	my ( $self, $train ) = @_;
+	my @json_route;
+	my @route       = $train->route;
+	my @sched_route = $train->sched_route;
+
+	my $route_idx = 0;
+	my $sched_idx = 0;
+
+	while ( $route_idx <= $#route and $sched_idx <= $#sched_route ) {
+		if ( $route[$route_idx] eq $sched_route[$sched_idx] ) {
+			push( @json_route, [ $route[$route_idx], {}, undef ] );
+			$route_idx++;
+			$sched_idx++;
+		}
+
+		# this branch is inefficient, but won't be taken frequently
+		elsif ( not( grep { $_ eq $route[$route_idx] } @sched_route ) ) {
+			push( @json_route, [ $route[$route_idx], {}, 'additional' ], );
+			$route_idx++;
+		}
+		else {
+			push( @json_route, [ $sched_route[$sched_idx], {}, 'cancelled' ], );
+			$sched_idx++;
+		}
+	}
+	while ( $route_idx <= $#route ) {
+		push( @json_route, [ $route[$route_idx], {}, 'additional' ], );
+		$route_idx++;
+	}
+	while ( $sched_idx <= $#sched_route ) {
+		push( @json_route, [ $sched_route[$sched_idx], {}, 'cancelled' ], );
+		$sched_idx++;
+	}
+	return @json_route;
+}
+
 1;
-- 
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