File Coverage

blib/lib/Time/Duration/Parse.pm

Criterion	Covered	Total	%
statement	31	31	100.0
branch	8	8	100.0
condition			n/a
subroutine	6	6	100.0
pod	1	1	100.0
total	46	46	100.0

package Time::Duration::Parse;
$Time::Duration::Parse::VERSION = '0.14';
use 5.006;
use strict;
use warnings;

use Carp;
use Exporter::Lite;
our @EXPORT = qw( parse_duration );

# This map is taken from Cache and Cache::Cache
# map of expiration formats to their respective time in seconds
my %Units = ( map(($_,             1), qw(s second seconds sec secs)),
              map(($_,            60), qw(m minute minutes min mins)),
              map(($_,         60*60), qw(h hr hrs hour hours)),
              map(($_,      60*60*24), qw(d day days)),
              map(($_,    60*60*24*7), qw(w week weeks)),
              map(($_,   60*60*24*30), qw(M month months mo mon mons)),
              map(($_,  60*60*24*365), qw(y year years)) );

sub parse_duration {
    my $timespec = shift;

    # You can have an optional leading '+', which has no effect
    $timespec =~ s/^\s*\+\s*//;

    # Treat a plain number as a number of seconds (and parse it later)
    if ($timespec =~ /^\s*(-?\d+(?:[.,]\d+)?)\s*$/) {
        $timespec = "$1s";
    }

    # Convert hh:mm(:ss)? to something we understand
    $timespec =~ s/\b(\d+):(\d\d):(\d\d)\b/$1h $2m $3s/g;
    $timespec =~ s/\b(\d+):(\d\d)\b/$1h $2m/g;

    my $duration = 0;
    while ($timespec =~ s/^\s*(-?\d+(?:[.,]\d+)?)\s*([a-zA-Z]+)(?:\s*(?:,|and)\s*)*//i) {
        my($amount, $unit) = ($1, $2);
        $unit = lc($unit) unless length($unit) == 1;

        if (my $value = $Units{$unit}) {
            $amount =~ s/,/./;
            $duration += $amount * $value;
        } else {
            Carp::croak "Unknown timespec: $1 $2";
        }
    }

    if ($timespec =~ /\S/) {
        Carp::croak "Unknown timespec: $timespec";
    }

    return sprintf "%.0f", $duration;
}

1;
__END__