package Module::CheckVersion::cpan;

use 5.010001;
use strict;
use warnings;

use HTTP::Tiny;
use JSON::MaybeXS;

our $AUTHORITY = 'cpan:PERLANCAR'; # AUTHORITY
our $DATE = '2026-04-07'; # DATE
our $DIST = 'Module-CheckVersion'; # DIST
our $VERSION = '0.090'; # VERSION

sub check_latest_version {
    my ($mod, $installed_version, $chkres) = @_;

    my $res = HTTP::Tiny->new->get("http://fastapi.metacpan.org/v1/module/$mod?fields=name,version");
    return [$res->{status}, "API request failed: $res->{reason}"] unless $res->{success};
    eval { $res = JSON::MaybeXS::decode_json($res->{content}) };
    return [500, "Can't decode JSON API response: $@"] if $@;
    return [500, "Error from API response: $res->{message}"] if $res->{message};
    my $latest_version = $res->{version};

    $chkres->{installed_version} = $installed_version;
    $chkres->{latest_version} = $latest_version;
    if (defined $installed_version) {
        my $cmp = eval {
            version->parse($installed_version) <=>
                version->parse($latest_version);
        };
        if ($@) {
            $chkres->{compare_version_err} = @_;
            $chkres->{is_latest_version} = undef;
        } else {
            $chkres->{is_latest_version} = $cmp >= 0 ? 1:0;
        }
    } else {
        $chkres->{is_latest_version} = 0;
    }
    [200];
}

1;
# ABSTRACT: Handler for "cpan" authority scheme

__END__

=pod

=encoding UTF-8

=head1 NAME

Module::CheckVersion::cpan - Handler for "cpan" authority scheme

=head1 VERSION

This document describes version 0.090 of Module::CheckVersion::cpan (from Perl distribution Module-CheckVersion), released on 2026-04-07.

=head1 SYNOPSIS

In F<Some/Module.pm>:

 our $AUTHORITY = 'cpan:APAUSEID';

=head1 DESCRIPTION

This handler will check module version on MetaCPAN.

=for Pod::Coverage .+

=head1 HOMEPAGE

Please visit the project's homepage at L<https://metacpan.org/release/Module-CheckVersion>.

=head1 SOURCE

Source repository is at L<https://github.com/perlancar/perl-Module-CheckVersion>.

=head1 AUTHOR

perlancar <perlancar@cpan.org>

=head1 CONTRIBUTING


To contribute, you can send patches by email/via RT, or send pull requests on
GitHub.

Most of the time, you don't need to build the distribution yourself. You can
simply modify the code, then test via:

 % prove -l

If you want to build the distribution (e.g. to try to install it locally on your
system), you can install L<Dist::Zilla>,
L<Dist::Zilla::PluginBundle::Author::PERLANCAR>,
L<Pod::Weaver::PluginBundle::Author::PERLANCAR>, and sometimes one or two other
Dist::Zilla- and/or Pod::Weaver plugins. Any additional steps required beyond
that are considered a bug and can be reported to me.

=head1 COPYRIGHT AND LICENSE

This software is copyright (c) 2026 by perlancar <perlancar@cpan.org>.

This is free software; you can redistribute it and/or modify it under
the same terms as the Perl 5 programming language system itself.

=head1 BUGS

Please report any bugs or feature requests on the bugtracker website L<https://rt.cpan.org/Public/Dist/Display.html?Name=Module-CheckVersion>

When submitting a bug or request, please include a test-file or a
patch to an existing test-file that illustrates the bug or desired
feature.

=cut
