File Coverage

blib/lib/Data/Section/Seekable/Writer.pm

Criterion	Covered	Total	%
statement	42	42	100.0
branch	15	16	93.7
condition	5	5	100.0
subroutine	10	10	100.0
pod	5	5	100.0
total	77	78	98.7

package Data::Section::Seekable::Writer;

use 5.010001;
use strict;
use warnings;

use overload
    '""'  => 'as_string',
    ;

our $AUTHORITY = 'cpan:PERLANCAR'; # AUTHORITY
our $DATE = '2023-01-20'; # DATE
our $DIST = 'Data-Section-Seekable'; # DIST
our $VERSION = '0.091'; # VERSION

sub new {
    my $class = shift;

    my $self = bless {@_}, $class;
    $self->empty;
    $self->{header} //= sub {
        my ($self, $name, $content, $extra) = @_;
        "### $name ###\n";
    };
    $self;
}

sub empty {
    my $self = shift;
    $self->{_toc} = [];
    $self->{_content} = '';
    $self->{_part_names} = {};
}

sub header {
    my $self = shift;
    $self->{header} = $_[0] if @_;
    $self->{header};
}

sub add_part {
    my ($self, $name, $content, $extra) = @_;
    die "Name cannot be empty" unless length($name);
    die "Name cannot contain comma/newline" if $name =~ /,|\R/;
    die "Extra cannot contain newline" if defined($extra) && $extra =~ /\R/;

    die "Duplicate part name '$name'" if $self->{_part_names}{$name}++;

    my $header;
    if (ref($self->{header}) eq 'CODE') {
        $header = $self->{header}->($self, $name, $content, $extra);
    } else {
        $header = $self->{header};
    }
    $self->{_content} .= $header if defined($header);

    push @{ $self->{_toc} }, [
        $name,
        length($self->{_content}),
        length($content),
        $extra,
    ];
    $self->{_content} .= $content;
}

sub as_string {
    my $self = shift;

    join(
        "",
        "Data::Section::Seekable v1\n",
        (map {"$_->[0],$_->[1],$_->[2]".(defined($_->[3]) ? ",$_->[3]":"")."\n"}
             @{ $self->{_toc} }),
        "\n",
        $self->{_content},
    );
}

1;
# ABSTRACT: Generate data section with multiple parts

__END__