package Mojo::Cookie::Response;
use Mojo::Base 'Mojo::Cookie';

use Mojo::Date;
use Mojo::Util qw(quote split_cookie_header);

has [qw(domain expires host_only httponly max_age path samesite secure)];

my %ATTRS
  = map { $_ => 1 } qw(domain expires httponly max-age path samesite secure);

sub parse {
  my ($self, $str) = @_;

  my @cookies;
  my $tree = split_cookie_header $str // '';
  while (my $pairs = shift @$tree) {
    my ($name, $value) = splice @$pairs, 0, 2;
    push @cookies, $self->new(name => $name, value => $value // '');

    while (my ($name, $value) = splice @$pairs, 0, 2) {
      next unless $ATTRS{my $attr = lc $name};
      $value =~ s/^\.// if $attr eq 'domain' && defined $value;
      $value = Mojo::Date->new($value // '')->epoch if $attr eq 'expires';
      $value = 1 if $attr eq 'secure' || $attr eq 'httponly';
      $cookies[-1]{$attr eq 'max-age' ? 'max_age' : $attr} = $value;
    }
  }

  return \@cookies;
}

sub to_string {
  my $self = shift;

  # Name and value
  return '' unless length(my $name = $self->name // '');
  my $value  = $self->value // '';
  my $cookie = join '=', $name, $value =~ /[,;" ]/ ? quote $value : $value;

  # "expires"
  my $expires = $self->expires;
  $cookie .= '; expires=' . Mojo::Date->new($expires) if defined $expires;

  # "domain"
  if (my $domain = $self->domain) { $cookie .= "; domain=$domain" }

  # "path"
  if (my $path = $self->path) { $cookie .= "; path=$path" }

  # "secure"
  $cookie .= "; secure" if $self->secure;

  # "HttpOnly"
  $cookie .= "; HttpOnly" if $self->httponly;

  # "Same-Site"
  if (my $samesite = $self->samesite) { $cookie .= "; SameSite=$samesite" }

  # "Max-Age"
  if (defined(my $max = $self->max_age)) { $cookie .= "; Max-Age=$max" }

  return $cookie;
}

1;

=encoding utf8

=head1 NAME

Mojo::Cookie::Response - HTTP response cookie

=head1 SYNOPSIS

  use Mojo::Cookie::Response;

  my $cookie = Mojo::Cookie::Response->new;
  $cookie->name('foo');
  $cookie->value('bar');
  say "$cookie";

=head1 DESCRIPTION

L<Mojo::Cookie::Response> is a container for HTTP response cookies, based on
L<RFC 6265|http://tools.ietf.org/html/rfc6265>.

=head1 ATTRIBUTES

L<Mojo::Cookie::Response> inherits all attributes from L<Mojo::Cookie> and
implements the following new ones.

=head2 domain

  my $domain = $cookie->domain;
  $cookie    = $cookie->domain('localhost');

Cookie domain.

=head2 expires

  my $expires = $cookie->expires;
  $cookie     = $cookie->expires(time + 60);

Expiration for cookie.

=head2 host_only

  my $bool = $cookie->host_only;
  $cookie  = $cookie->host_only($bool);

Host-only flag, indicating that the canonicalized request-host is identical to
the cookie's L</"domain">.

=head2 httponly

  my $bool = $cookie->httponly;
  $cookie  = $cookie->httponly($bool);

HttpOnly flag, which can prevent client-side scripts from accessing this
cookie.

=head2 max_age

  my $max_age = $cookie->max_age;
  $cookie     = $cookie->max_age(60);

Max age for cookie.

=head2 path

  my $path = $cookie->path;
  $cookie  = $cookie->path('/test');

Cookie path.

=head2 samesite

  my $samesite = $cookie->samesite;
  $cookie      = $cookie->samesite('Lax');

SameSite value. Note that this attribute is B<EXPERIMENTAL> because even though
most commonly used browsers support the feature, there is no specification yet
besides
L<this draft|https://tools.ietf.org/html/draft-west-first-party-cookies-07>.

=head2 secure

  my $bool = $cookie->secure;
  $cookie  = $cookie->secure($bool);

Secure flag, which instructs browsers to only send this cookie over HTTPS
connections.

=head1 METHODS

L<Mojo::Cookie::Response> inherits all methods from L<Mojo::Cookie> and
implements the following new ones.

=head2 parse

  my $cookies = Mojo::Cookie::Response->parse('f=b; path=/');

Parse cookies.

=head2 to_string

  my $str = $cookie->to_string;

Render cookie.

=head1 SEE ALSO

L<Mojolicious>, L<Mojolicious::Guides>, L<https://mojolicious.org>.

=cut
