/ 
Badger-0.16
River stage one • 4 direct dependents • 7 total dependents
/ Badger::Duration

NAME

Badger::Duration - simple class for representing durations

SYNOPSIS

use Badger::Duration 'Duration';

my $d = Duration('7 days 4 hours 20 minutes');

print "$d is ", $d->seconds, " seconds\n";

DESCRIPTION

This is a simple module for parsing durations.

It is ideally suited for things like the calculation of expiry times (e.g. for cookies, items in a cache, etc) allowing them to be specified in human-friendly format, e.g. "4 minutes 20 seconds" (or various alternatives).

EXPORTABLE SUBROUTINES

DURATION

This is a shortcut alias to Badger::Duration.

use Badger::Duration 'DURATION';

my $duration = DURATION->new(
    hours   => 4,
    minutes => 20,
);              # same as Badger::Duration->new(...);

Duration()

This subroutine returns the name of the Badger::Duration class when called without arguments. Thus it can be used as an alias for Badger::Duration as per DURATION.

use Badger::Duration 'Duration';

my $duration = Duration->new(...);  # same as Badger::Duration->new(...);

When called with arguments, it creates a new Badger::Duration object.

my $duration = Duration(...);       # same as Badger::Duration->new(...);

METHODS

The following methods are defined in addition to those inherited from the Badger::Comparable and Badger::Base base classes.

new()

Constructor method to create a new Badger::Duration object. The duration can be specified as a single duration parameter.

my $d = Badger::Duration->new(
    duration => '4 minutes 20 seconds'
);

The duration string can contain any number of "<number> <duration>" sequences separate by whitespace, commas or the word and. The following are all valid:

4 minutes 20 seconds
4 minutes,20 seconds
4 minutes, 20 seconds
4 minutes and 20 seconds

The canonical names for durations are: year, month, day, hour, minute and second. The following aliases may be used:

second
s sec secs seconds
minute
m min mins minutes
hour
h hr hrs hours
day
d days
week
w wk weeks
month
M mon mons months
year
y yr yrs years

A duration can also be specified using named parameters:

my $d = Badger::Duration->new(
    minutes => 4,
    seconds => 20,
);

Or by reference to a hash array:

my $d = Badger::Duration->new({
    minutes => 4,
    seconds => 20,
});

This can also be specified as an explicit duration option if you prefer:

my $d = Badger::Duration->new(
    duration => {
        minutes => 4,
        seconds => 20,
    }
);

In all cases, any of the valid aliases for durations may be used, e.g.

my $d = Badger::Duration->new(
    h => 1,
    m => 4,
    s => 20,
);

duration()

Returns a reference to a hash array containing the canonical values of the duration.

my $d = Badger::Duration->new(
    duration => '4 hours 20 minutes'
);
my $h = $d->duration;
print $h->{ hour   };     # 4
print $h->{ minute };     # 20

seconds()

Returns the total number of seconds for the duration.

my $d = Badger::Duration->new(
    duration => '4 hours 20 minutes'
);
print $d->seconds;      # 15600

compare($that)

This method is defined to enable the functionality provided by the Badger::Comparable base class.

use Badger::Duration 'Duration';

my $d1 = Duration('4 hours 20 minutes');
my $d2 = Duration('270 minutes');

if ($d1 < $d2) {
    # ...do something...
}

text()

Returns a canonical text representation of the duration.

use Badger::Duration 'Duration';
my $d1 = Duration('4 hrs 20 mins');
print $d1->text;            # 4 hours 20 minutes

Note that the units will be pluralised appropriately. e.g.

1 hour 1 minute 1 second
2 hours 2 minutes 2 seconds

This method is bound to the auto-stringification operation which is a fancy way of saying it gets called automatically when you simply print a Badger::Duration object.

print $d1;                  # 4 hours 20 minutes

INTERNAL METHODS

init($config)

Object initialisation method called automatically by the new() constructor method inherited from the Badger::Base base class.

parse_text($text)

Internal method to parse a text string and return a hash reference of canonical values.

parse_hash($hash)

Internal method to parse a hash reference and return another hash reference of canonical values (e.g. after mapping aliases to canonical names).

count_seconds($hash)

Counts the total number of seconds in a duration passed by reference to a hash array.

AUTHOR

Andy Wardley http://wardley.org

COPYRIGHT

Copyright (C) 2013 Andy Wardley. All Rights Reserved.

This module is free software; you can redistribute it and/or modify it under the same terms as Perl itself.