From 094d5ccf7e3a7b74d33a7b0db16f37e68d86590c Mon Sep 17 00:00:00 2001
From: Daniel Friesel <derf@finalrewind.org>
Date: Mon, 13 Jan 2014 13:41:54 +0100
Subject: db-iris: -od: only show most recent delay reason. use -oD for all

---
 bin/db-iris                         | 16 +++++++++++++---
 lib/Travel/Status/DE/IRIS/Result.pm | 30 ++++++++++++++++++++++++++----
 2 files changed, 39 insertions(+), 7 deletions(-)

diff --git a/bin/db-iris b/bin/db-iris
index 530af08..8e5909a 100755
--- a/bin/db-iris
+++ b/bin/db-iris
@@ -75,6 +75,7 @@ if ($time) {
 for my $efield (@edata_pre) {
 	given ($efield) {
 		when ('d') { $edata{delay}     = 1 }
+		when ('D') { $edata{delays}    = 1 }
 		when ('f') { $edata{fullroute} = 1 }
 		when ('m') { $edata{messages}  = 1 }
 		when ('q') { $edata{qos}       = 1 }
@@ -141,12 +142,17 @@ sub display_result {
 
 	for my $line (@lines) {
 		printf(
-			join( q{  }, ( map { "%-${_}s" } @line_length ) ) . "\n",
+			join( q{  }, ( map { "%-${_}s" } @line_length ) ),
 			@{$line}[ 0 .. 4 ]
 		);
 
 		my $d = $line->[5];
 
+		if ( $edata{delay} and $d->delay and $d->delay_messages ) {
+			printf( '  %s', ( $d->delay_messages )[-1]->[1] );
+		}
+		print "\n";
+
 		if ( $edata{times} ) {
 			if ( not defined $d->delay ) {
 				print "\n";
@@ -293,8 +299,12 @@ Valid output types are:
 
 =item d / delay
 
-List all delay reasons entered into the IRIS, even if the train is on time
-by now.
+If a train is delayed, show the most recent reason for this delay.
+
+=item d / delays
+
+List all delay reasons entered into the IRIS for each train, even if the
+particular train is on time by now.
 
 =item f / fullroute
 
diff --git a/lib/Travel/Status/DE/IRIS/Result.pm b/lib/Travel/Status/DE/IRIS/Result.pm
index c3dd8aa..58a3a99 100644
--- a/lib/Travel/Status/DE/IRIS/Result.pm
+++ b/lib/Travel/Status/DE/IRIS/Result.pm
@@ -173,6 +173,25 @@ sub destination {
 	return $self->route_end;
 }
 
+sub delay_messages {
+	my ($self) = @_;
+
+	my $strp = DateTime::Format::Strptime->new(
+		pattern   => '%y%m%d%H%M',
+		time_zone => 'Europe/Berlin',
+	);
+
+	my @keys = sort keys %{ $self->{messages} };
+	my @msgs
+	  = uniq( grep { $_->[1] eq 'd' } map { $self->{messages}{$_} } @keys );
+
+	my @ret = map {
+		[ $strp->parse_datetime( $_->[0] ), $self->translate_msg( $_->[2] ) ]
+	} @msgs;
+
+	return @ret;
+}
+
 sub messages {
 	my ($self) = @_;
 
@@ -181,10 +200,13 @@ sub messages {
 		time_zone => 'Europe/Berlin',
 	);
 
-	my @messages = sort keys %{ $self->{messages } };
-	my @ret = map { [ $strp->parse_datetime($self->{messages}->{$_}->[0]),
-	$self->translate_msg($self->{messages}->{$_}->[2]) ] }
-		@messages;
+	my @messages = sort keys %{ $self->{messages} };
+	my @ret      = map {
+		[
+			$strp->parse_datetime( $self->{messages}->{$_}->[0] ),
+			$self->translate_msg( $self->{messages}->{$_}->[2] )
+		]
+	} @messages;
 
 	return @ret;
 }
-- 
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