#!/usr/bin/perl

# Created on: 2012-07-26 21:00:52
# Create by:  Ivan Wills
# $Id$
# $Revision$, $HeadURL$, $Date$
# $Revision$, $Source$, $Date$

use strict;
use warnings;
use Getopt::Long;
use Pod::Usage;
use Data::Dumper qw/Dumper/;
use English qw/ -no_match_vars /;
use FindBin qw/$Bin/;
use XML::LibXML;
use URI;

our $VERSION = 0.14;
my ($name)   = $PROGRAM_NAME =~ m{^.*/(.*?)$}mxs;

my %option = (
    verbose => 0,
    man     => 0,
    help    => 0,
    VERSION => 0,
);

if ( !@ARGV ) {
    pod2usage( -verbose => 1 );
}

main();
exit 0;

sub main {

    Getopt::Long::Configure('bundling');
    GetOptions(
        \%option,
        'verbose|v+',
        'man',
        'help',
        'VERSION!',
    ) or pod2usage(2);

    if ( $option{'VERSION'} ) {
        print "$name Version = $VERSION\n";
        exit 1;
    }
    elsif ( $option{'man'} ) {
        pod2usage( -verbose => 2 );
    }
    elsif ( $option{'help'} ) {
        pod2usage( -verbose => 1 );
    }

    # do stuff here

    while ( my $url = shift @ARGV ) {
        get_dependencies($url);
    }

    return;
}

sub get_dependencies {
    my ($url) = @_;
    my $xml = XML::LibXML->load_xml(location => $url);

    # write the xml
    my $file = $url;
    $file =~ s{[\\/:?&'"]}{_}g;
    open my $pipe, '|-', "xmllint --format - > '$file'" or die $!;

    # look for any xsds imported or included
    my $xpc = XML::LibXML::XPathContext->new($xml);
    $xpc->registerNs(xsd  => 'http://www.w3.org/2001/XMLSchema');

    my @xsds = $xpc->findnodes('//xsd:import');
    push @xsds, $xpc->findnodes('//xsd:include');

    while ( my $xsd = shift @xsds ) {
        my $loc = $xsd->getAttribute('schemaLocation') || $xsd->getAttribute('namespace');
        if ( $url && $url =~ m{^(?:https?|ftp)://} ) {
            $loc = URI->new_abs($loc, $url) . '';
        }
        my $file = get_dependencies($loc);
        $xsd->setAttribute('schemaLocation', $file);
    }
    print {$pipe} $xml->toString;

    return $file;
}

__DATA__

=head1 NAME

get-resources - Get resources of XSD or WSDL document

=head1 VERSION

This documentation refers to get-resources version 0.14.

=head1 SYNOPSIS

   get-resources [option] file_or_url ...

 OPTIONS:
  -v --verbose       Show more detailed option
     --version       Prints the version information
     --help          Prints this help information
     --man           Prints the full documentation for get-resources

=head1 DESCRIPTION

=head1 SUBROUTINES/METHODS

=head1 DIAGNOSTICS

=head1 CONFIGURATION AND ENVIRONMENT

=head1 DEPENDENCIES

=head1 INCOMPATIBILITIES

=head1 BUGS AND LIMITATIONS

There are no known bugs in this module.

Please report problems to Ivan Wills (ivan.wills@gmail.com).

Patches are welcome.

=head1 AUTHOR

Ivan Wills - (ivan.wills@gmail.com)

=head1 LICENSE AND COPYRIGHT

Copyright (c) 2012 Ivan Wills (14 Mullion Close, Hornsby Heights, NSW Australia 2077).
All rights reserved.

This module is free software; you can redistribute it and/or modify it under
the same terms as Perl itself. See L<perlartistic>.  This program is
distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
PARTICULAR PURPOSE.

=cut