#!/usr/bin/perl

my $raw_graph = [
    'root', undef,
    [   "Amiri",
        "Test tubes are clear.",
        [ "Darla", "Jump!" ],
        [ "Jeff",   "Daytime." ],
    ],
    [   "Ryan",
        "Oops.",
    ],
];

my $left = 1;
my $id   = 1;
my $out = [];
explorenode( $raw_graph, $out, $left, $id );

print "[ @$_ ]\n" for @$out;

sub explorenode {
    my ( $node, $rows, $l, $i ) = @_;
    $left++;
    $id++;
    for ( 2 .. $#$node ) {
        explorenode( $node->[$_], $rows, $left, $id );
    }
    push( @$rows, [ $i, $l, $left, $node->[0], $node->[1] ] );
    $left++;
}

__END__
[ 3 3 4 Darla Jump! ]
[ 4 5 6 Jeff Daytime. ]
[ 2 2 7 Amiri Test tubes are clear. ]
[ 5 8 9 Ryan Oops. ]
[ 1 1 10 root  ]