From bc207d520565dc9b140d44a0ac363d973d605f5f Mon Sep 17 00:00:00 2001
From: Daniel Friesel <derf@finalrewind.org>
Date: Sun, 28 Feb 2016 20:01:05 +0100
Subject: Partially fix excessive requests for stations with long "meta" tags

---
 lib/Travel/Status/DE/IRIS.pm | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/lib/Travel/Status/DE/IRIS.pm b/lib/Travel/Status/DE/IRIS.pm
index 937bb65..36237c9 100644
--- a/lib/Travel/Status/DE/IRIS.pm
+++ b/lib/Travel/Status/DE/IRIS.pm
@@ -12,6 +12,8 @@ use Carp qw(confess cluck);
 use DateTime;
 use Encode qw(encode decode);
 use List::Util qw(first);
+use List::MoreUtils qw(uniq);
+use List::UtilsBy qw(uniq_by);
 use LWP::UserAgent;
 use Travel::Status::DE::IRIS::Result;
 use XML::LibXML;
@@ -197,11 +199,14 @@ sub get_station {
 		printf( " -> %s (%s / %s)\n", @{ $ret[0] }{qw{name uic ds100}} );
 	}
 
+	# TODO this approach is flawed, iterative is probably better
+
 	if ( $opt{recursive} and $station_node->hasAttribute('meta') ) {
 		my @recursion_blacklist = @{ $opt{recursion_blacklist} // [] };
-		my @refs = split( m{ \| }x, $station_node->getAttribute('meta') );
+		my @refs = uniq(split( m{ \| }x, $station_node->getAttribute('meta') ));
+
+		push( @recursion_blacklist, map { $_->{uic} } @ret );
 
-		push( @recursion_blacklist, $ret[0]{uic} );
 		for my $ref (@refs) {
 			if ( not( $ref ~~ \@recursion_blacklist ) ) {
 				push(
@@ -217,6 +222,8 @@ sub get_station {
 		}
 	}
 
+	@ret = uniq_by { $_->{uic} } @ret;
+
 	return @ret;
 }
 
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