File Coverage

blib/lib/WWW/Shorten/Naver.pm

Criterion	Covered	Total	%
statement	21	21	100.0
branch			n/a
condition			n/a
subroutine	7	7	100.0
pod			n/a
total	28	28	100.0

package WWW::Shorten::Naver;
use strict;
use warnings;
use Carp ();
use JSON::MaybeXS;
use URI ();
use Scalar::Util qw(blessed);
use parent qw( WWW::Shorten::generic Exporter );
our @EXPORT = qw(new VERSION);

our $VERSION = '0.02';
$VERSION = eval $VERSION;

use constant NAVER_SHORTEN_API_ENDPOINT => $ENV{NAVER_SHORTEN_API_URL} || 'https://openapi.naver.com/v1/util/shorturl';

sub _attr {
    my $self = shift;
    my $attr = lc(_trim(shift) || '');
    # attribute list is small enough to just grep each time. meh.
    Carp::croak("Invalid attribute") unless grep {$attr eq $_} @{_attrs()};
    return $self->{$attr} unless @_;

    my $val = shift;
    unless (defined($val)) {
        $self->{$attr} = undef;
        return $self;
    }
    $self->{$attr} = $val;
    return $self;
}

# _attrs (static, private)
{
    my $attrs; # mimic the state keyword
    sub _attrs {
        return [@{$attrs}] if $attrs;
        $attrs = [
            qw(username password access_token client_id client_secret),
        ];
        return [@{$attrs}];
    }
}

sub _request {
    my ($self, $url) = @_;

    Carp::croak("Invalid URI object") unless $url && blessed($url) && $url->isa('URI');

    my $ua = __PACKAGE__->ua();
    $ua->default_header( 'X-Naver-Client-ID'     => $self->client_id     );
    $ua->default_header( 'X-Naver-Client-Secret' => $self->client_secret );

    my $res = $ua->get($url);
    Carp::croak("Invalid response") unless $res;
    unless ($res->is_success) {
        Carp::croak($res->status_line);
    }

    my $content_type = $res->header('Content-Type');
    my $content = $res->decoded_content();
    unless ($content_type && $content_type =~ m{application/json}) {
        Carp::croak("Unexpected response: $content");
    }
    my $json = decode_json($content);
    Carp::croak("Invalid data returned: $content") unless $json;
    return $json->{result};
}

# _parse_args (static, private)
sub _parse_args {
    my $args;
    if ( @_ == 1 && ref $_[0] ) {
        my %copy = eval { %{ $_[0] } }; # try shallow copy
        Carp::croak("Argument to method could not be dereferenced as a hash") if $@;
        $args = \%copy;
    }
    elsif (@_==1 && !ref($_[0])) {
        $args = {single_arg => $_[0]};
    }
    elsif ( @_ % 2 == 0 ) {
        $args = {@_};
    }
    else {
        Carp::croak("Method got an odd number of elements");
    }
    return $args;
}

# _trim (static, private)
sub _trim {
    my $input = shift;
    return $input unless defined $input && !ref($input) && length($input);
    $input =~ s/\A\s*//;
    $input =~ s/\s*\z//;
    return $input;
}

sub new {
    my $class = shift;
    my $args;
    if ( @_ == 1 && ref $_[0] ) {
        my %copy = eval { %{ $_[0] } }; # try shallow copy
        Carp::croak("Argument to $class->new() could not be dereferenced as a hash") if $@;
        $args = \%copy;
    }
    elsif ( @_ % 2 == 0 ) {
        $args = {@_};
    }
    else {
        Carp::croak("$class->new() got an odd number of elements");
    }

    my $attrs = _attrs();
    my $href = {};
    for my $key (%{$args}) {
        $href->{$key} = $args->{$key};
    }
    return bless $href, $class;
}


sub client_id { return shift->_attr('client_id', @_); }

sub client_secret { return shift->_attr('client_secret', @_); }

sub makeashorterlink {
    my $self;
    if ($_[0] && blessed($_[0]) && $_[0]->isa('WWW::Shorten::Naver')) {
        $self = shift;
    }
    my $url = shift or Carp::croak('No URL passed to makeashorterlink');
    $self ||= __PACKAGE__->new(@_);
    my $res = $self->shorten( url => $url, @_);
    return $res->{url};
}

sub makealongerlink { }


sub shorten {
    my $self = shift;

    my $args = _parse_args(@_);

    my $long_url = $args->{url};
    unless ($long_url) {
        Carp::croak("A longUrl parameter is required.\n");
    }

    my $url = URI->new(NAVER_SHORTEN_API_ENDPOINT);
    $url->query_form(
        url => $long_url,
    );
    return $self->_request($url, $args);
}

1; # End of WWW::Shorten::Naver
__END__