File Coverage

blib/lib/Sort/Sub/date_in_text.pm

Criterion	Covered	Total	%
statement	52	52	100.0
branch	16	22	72.7
condition	6	9	66.6
subroutine	10	10	100.0
pod	0	1	0.0
total	84	94	89.3

package Sort::Sub::date_in_text;

our $DATE = '2016-04-06'; # DATE
our $VERSION = '0.002'; # VERSION

use 5.010001;
use strict;
use warnings;

use DateTime;

our $DATE_EXTRACT_MODULE = $ENV{PERL_DATE_EXTRACT_MODULE} // "Date::Extract";

sub gen_sorter {
    my ($is_reverse, $is_ci) = @_;

    my $re_is_num = qr/\A
                       [+-]?
                       (?:\d+|\d*(?:\.\d*)?)
                       (?:[Ee][+-]?\d+)?
                       \z/x;

    my $module = $DATE_EXTRACT_MODULE;
    $module = "Date::Extract::$module" unless $module =~ /::/;
    die "Invalid module '$module'" unless $module =~ /\A\w+(::\w+)*\z/;
    eval "use $module"; die if $@;
    my $parser = $module->new;

    sub {
        no strict 'refs';

        my $caller = caller();
        my $a = @_ ? $_[0] : ${"$caller\::a"};
        my $b = @_ ? $_[1] : ${"$caller\::b"};

        my $cmp;

        # XXX cache

        my $dt_a = $parser->extract($a);
        my $dt_b = $parser->extract($b);

        {
            if ($dt_a && $dt_b) {
                $cmp = DateTime->compare($dt_a, $dt_b);
                last if $cmp;
            } elsif ($dt_a && !$dt_b) {
                $cmp = -1;
                last;
            } elsif (!$dt_a && $dt_b) {
                $cmp = 1;
                last;
            }

            if ($is_ci) {
                $cmp = lc($a) cmp lc($b);
            } else {
                $cmp = $a cmp $b;
            }
        }

        $is_reverse ? -1*$cmp : $cmp;
    };
}

1;
# ABSTRACT: Sort by date found in text or (if no date is found) ascibetically

__END__