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has 'access_token' => (
    isa      => 'Str',
    is       => 'rw',
    required => 1,
);

has 'refresh_token' => (
    isa => 'Str',
    is  => 'ro',
);

has '_client' => (
    isa        => 'HTTP::Tiny',
    is         => 'ro',
    lazy_build => 1,
);

sub _build__client {
    my $self = shift;

    return HTTP::Tiny->new(
        agent           => join( '/', __PACKAGE__, $VERSION ),
        default_headers => {
            'Authorization' => 'Bearer ' . $self->access_token,
            'Accept'        => 'application/json',
            'Content-Type'  => 'application/json',
        }
    );
}

sub get_current_user {
    my $self = shift;

    my $res = $self->_request( 'GET', 'me' );

    return $res->{data};
}

sub create_post {
    my ( $self, $user_id, $post ) = @_;

    $post->{publishStatus} ||= 'draft';

    my $res = $self->_request( 'POST', 'users/' . $user_id . '/posts', $post );
    return $res->{data}{url};
}

sub create_publication_post {
    my ( $self, $publication_id, $post ) = @_;

    $post->{publishStatus} ||= 'draft';

    my $res =
        $self->_request( 'POST', 'publications/' . $publication_id . '/posts',
        $post );
    return $res->{data}{url};
}

sub _request {
    my ( $self, $method, $endpoint, $data ) = @_;

    my $url = join( '/', $self->server, $endpoint );

    my $res;
    if ($data) {
        $res = $self->_client->request( $method, $url,
            { content => encode_json($data) } );
    }
    else {
        $res = $self->_client->request( $method, $url );
    }
    if ( $res->{success} ) {
        return decode_json( $res->{content} );
    }
    else {
        $log->errorf( "Could not talk to medium: %i %s",
            $res->{status}, $res->{reason} );
        die join( ' ', $res->{status}, $res->{reason} );
    }
}

__PACKAGE__->meta->make_immutable;
1;

__END__

=pod

=encoding UTF-8

=head1 NAME

API::Medium - Talk with medium.com using their REST API

=head1 VERSION

version 0.902

=head1 SYNOPSIS

  use API::Medium;
  my $m = new({
      access_token=>'your_token',
  });
  my $hash = $m->get_current_user;
  say $hash->{id};

  my $url       = $m->create_post( $user_id, $post );

  my $other_url = $m->create_publication_post( $publication_id, $post );

=head1 DESCRIPTION

It's probably a good idea to read L<the Medium API
docs|https://github.com/Medium/medium-api-docs> first, especially as
the various data structures you have to send (or might get back) are
B<not> documented here.

See F<example/hello_medium.pl> for a complete script.

=head2 Authentication