#!/usr/bin/env perl
#
# This file is part of Geo::ICAO
# Copyright (c) 2007 Jerome Quelin, all rights reserved.
#
# This program is free software; you can redistribute it and/or modify
# it under the same terms as Perl itself.
#
#

use strict;
use warnings;

use charnames qw[ :full ];
use Encode;
use Readonly;

# fetch data from wikipedia
Readonly my $URL => 'http://en.wikipedia.org/wiki/List_of_airports_by_ICAO_code:_';

foreach my $letter ( 'A' .. 'Z' ) {
    my $url = $URL . $letter;
    my @lines = qx[ lynx -dump -nolist -width=500 $url  ];
    #my @lines = qx[cat codes];

    foreach my $line ( map {decode('utf-8',$_)} @lines ) {
        chomp $line;
        next unless $line =~
            /\A
            \s+ \*                # a litteral *
            \s+ $letter[A-Z]{3}   # the airport code
            \s+                   # some space just after
            .* \N{EN DASH}        # and a dash
            /x;
        my ($code, $name, $location) = split /\s*\N{EN DASH}\s*/, $line;
        $code =~ s/^\s*\*\s*//;
        $code =~ s/\s*\([^)]+\)\s*//;
        $location ||= '';
        my $out = "$code|$name|$location";
        print encode('utf-8', "$out\n");
    }
}

exit;

__END__

=head1 NAME

get-airport_codes - fetch ICAO airport code from wikipedia


=head1 SYNOPSIS

    using vi to update Geo::ICAO...
    $ vi lib/Geo/ICAO.pm
        /__DATA
        jdG
        :r!scripts/get-airport_codes


=head1 DESCRIPTION

A comprehensive list of ICAO airport codes is available on
L<http://en.wikipedia.org/wiki/List_of_airports_by_ICAO_code:_$letter>.
C<get-airport_codes> is a small script that will fetch and parse these
urls (one for each of the 26 letters), to extract this list of airport
codes. It will then dump them as "code|name|location" lines, to be
inserted directly in Geo::ICAO's C<DATA> section.


=head1 AUTHOR

Jerome Quelin, C<< <jquelin at cpan.org> >>


=head1 COPYRIGHT & LICENSE

Copyright (c) 2007 Jerome Quelin, all rights reserved.

This program is free software; you can redistribute it and/or modify
it under the same terms as Perl itself.


=cut