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-rwxr-xr-xbin/umlauf-to-dot100
1 files changed, 100 insertions, 0 deletions
diff --git a/bin/umlauf-to-dot b/bin/umlauf-to-dot
new file mode 100755
index 0000000..c884e26
--- /dev/null
+++ b/bin/umlauf-to-dot
@@ -0,0 +1,100 @@
+#!/usr/bin/env perl
+
+use strict;
+use warnings;
+use 5.020;
+use utf8;
+
+use File::Slurp qw(read_file);
+use JSON;
+use List::Util qw(uniq);
+
+sub show_usage {
+ my ($exit_code) = @_;
+
+ say STDERR
+"Usage: umlauf-to-dot <wagenreihung.json> [line number] | dot -Tpng > umlauf.png";
+
+ exit $exit_code;
+}
+
+sub contained_in {
+ my ( $value, @list ) = @_;
+
+ for my $elem (@list) {
+ if ( $elem eq $value ) {
+ return 1;
+ }
+ }
+ return;
+}
+
+sub format_train {
+ my ( $train_no, $train ) = @_;
+
+ return sprintf( '"%s %d\n%s\n%s"',
+ $train->{type} // 'Zug',
+ $train_no,
+ $train->{route}{start} // $train->{route}{preStart} // '?',
+ $train->{route}{end} // $train->{route}{postEnd} // '?' );
+}
+
+if ( @ARGV < 1 ) {
+ show_usage(1);
+}
+
+my ( $file, $line ) = @ARGV;
+
+my $file_content = read_file($file);
+my $json = JSON->new->utf8->decode($file_content);
+
+my $map = $json->{train};
+
+my @train_numbers;
+if ($line) {
+ my @queue = ($line);
+
+ while (@queue) {
+ my $train_number = pop @queue;
+ push( @train_numbers, $train_number );
+ my @candidates;
+ push( @candidates, @{ $map->{$train_number}{cycle}{from} // [] } );
+ push( @candidates, @{ $map->{$train_number}{cycle}{to} // [] } );
+ @candidates = uniq @candidates;
+ @candidates
+ = grep { not contained_in( $_, @train_numbers, @queue ) } @candidates;
+ if (@candidates) {
+ printf( "# handle %s -> push %s\n",
+ $train_number, join( " ", @candidates ) );
+ }
+ push( @queue, @candidates );
+ }
+}
+else {
+ @train_numbers = keys %{$map};
+}
+
+my @output;
+
+for my $train_number (@train_numbers) {
+ for my $from ( @{ $map->{$train_number}{cycle}{from} } ) {
+ push(
+ @output,
+ sprintf( "%s -> %s;",
+ format_train( $from, $map->{$from} ),
+ format_train( $train_number, $map->{$train_number} ) )
+ );
+ }
+ for my $to ( @{ $map->{$train_number}{cycle}{to} } ) {
+ push(
+ @output,
+ sprintf( "%s -> %s;",
+ format_train( $train_number, $map->{$train_number} ),
+ format_train( $to, $map->{$to} ) )
+ );
+ }
+}
+
+say "digraph Umlauf {";
+say join( "\n", uniq @output );
+say "}"