package MojoReader;
use Mojo::Base 'Mojolicious';
use MojoReader::Model::Addfeed;

sub startup {
  my $self = shift;

  # Load configuration from hash returned by "my_app.conf"
  my $config = $self->plugin('Config');

  $self->helper(addfeed => sub {
      state $addfeed = MojoReader::Model::Addfeed->new(storage_path => $config->{storage_path})
  });
  ...

}

package MojoReader::Model::Addfeed;
use Mojo::Base -signatures;

has 'storage_path';

sub check ($self) {
  if ( -e $self->storage_path ) {
    return 1;
  }
  # Fail
  return undef;
}

1;