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package Subtitle::SSA::Header;
use strict;
use warnings;
use utf8;
use overload
'""' => \&to_string,
;
sub new {
my ($class, %opts) = @_;
my $self = {
_eol => "\n",
_vers => 'ass',
_error => undef,
_order => [],
};
if ($opts{version} and $opts{version} =~ m{^(ssa|ass)$}oi) {
$self->{_vers} = lc($opts{version});
}
return bless($self, $class);
}
sub error {
my ($self, $text) = @_;
if (defined $text) {
$self->{_error} = $text;
return;
}
return $self->{_error};
}
sub hash_key {
my ($self, $name) = @_;
$name = lc($name);
$name =~ s{[\ \t]}{}go;
return $name;
}
sub get {
my ($self, $name) = @_;
$name = $self->hash_key($name);
if ($name eq 'scripttype') {
return ($self->{_vers} eq 'ass') ? 'v4.00+' : 'v4.00' ;
}
return if not exists $self->{$name};
return $self->{$name}->{value};
}
sub set {
my ($self, $name, $value) = @_;
my $data = {
name => $name,
value => $value,
};
$name = $self->hash_key($name);
if ($name eq 'scripttype') {
if ($value =~ m{v4\.00$}o) {
$self->{_vers} = 'ssa';
} elsif ($value =~ m{v4\.00\+$}o) {
$self->{_vers} = 'ass';
}
return;
}
push @{ $self->{_order} }, $name
if not exists $self->{$name};
$self->{$name} = $data;
return;
}
sub parse {
my ($self, $line) = @_;
return unless $line;
return 1 if $line =~ m{^\s*;}o; # comment
chomp $line;
$line =~ s{^\s+}{}o;
$line =~ s{\s+$}{}o;
my ($name, $value) = split /\s*:\s*/, $line, 2;
$self->set($name, $value);
return 1;
}
sub to_string {
my ($self) = @_;
my ($vers, $out);
$vers = ($self->{_vers} eq 'ass') ? 'v4.00+' : 'v4.00' ;
$out = "[Script Info]" . $self->{_eol};
$out .= "; generated with Subtitle::SSA" . $self->{_eol};
$out .= "ScriptType: $vers" . $self->{_eol};
foreach my $key (@{ $self->{_order} }) {
my $name = $self->{$key}->{name};
my $value = $self->{$key}->{value};
$out .= "$name: $value" . $self->{_eol};
}
$out .= $self->{_eol};
return $out;
}
1;