/
Util.pm
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/
Util.pm
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use strict;
use warnings;
package Moonpig::Util;
# ABSTRACT: essential extra helper functions for Moonpig
use Moonpig;
use Moonpig::Types ();
use Moonpig::Events::Event;
use Moose::Util::TypeConstraints ();
use Carp qw(croak);
use JSON 2;
use MooseX::ClassCompositor;
use MooseX::StrictConstructor::Trait::Class;
use Moose::Util::MetaRole ();
use Number::Nary ();
use Scalar::Util qw(refaddr);
use String::RewritePrefix;
use Sub::Exporter -setup => [ qw(
class class_roles
event
cents dollars to_cents to_dollars
days weeks months years
days_in_year
json
random_short_ident
same_object
pair_lefts pair_rights
percent
sum sumof
) ];
my $COMPOSITOR = MooseX::ClassCompositor->new({
class_basename => 'Moonpig::Class',
class_metaroles => {
class => [
'MooseX::StrictConstructor::Trait::Class',
'Stick::Trait::Class::CanQueryPublished',
],
},
role_prefixes => {
'' => 'Moonpig::Role::',
'=' => '',
't::' => 't::lib::Role::',
}
});
use Moose::Util qw(apply_all_roles);
# Arguments here are role names, or role objects followed by nonce-names.
sub class {
$COMPOSITOR->class_for(@_);
}
sub class_roles {
return { $COMPOSITOR->known_classes };
}
sub event {
my ($ident, $payload) = @_;
$payload ||= {};
$payload->{timestamp} ||= Moonpig->env->now();
Moonpig::Events::Event->new({
ident => $ident,
payload => $payload,
});
}
sub cents {
my ($cents) = @_;
my $millicents = $cents * 1000;
return int ($millicents + 0.5);
}
# returns unrounded fractional cents
# to_cents(142857) returns 142.857 cents
sub to_cents {
my ($millicents) = @_;
return $millicents / 1000;
}
sub dollars {
my ($dollars) = @_;
my $millicents = $dollars * 100 * 1000;
$millicents += 0.5 if $millicents > 0;
return int $millicents;
}
# returns unrounded fractional dollars
# to_dollars(142857) returns 1.42857 dollars
sub to_dollars {
my ($millicents) = @_;
return $millicents / (1000 * 100);
}
sub days { $_[0] * 86400 } # Ignores leap seconds and DST
sub weeks { $_[0] * 86400 * 7 }
sub months { $_[0] * 86400 * 30 } # also ignores varying month lengths
sub years { $_[0] * 86400 * 365.25 } # also ignores the Gregorian calendar
# Hail Caesar!
sub days_in_year {
my ($y) = @_;
croak "4-digit year required" if $y < 1000;
$y % 400 == 0 ? 366 :
$y % 100 == 0 ? 365 :
$y % 4 == 0 ? 366 : 365;
}
sub same_object {
my ($a, $b) = @_;
my $me = "Moonpig::Util::same_object";
@_ == 2 or croak(@_ . " arguments to $me");
my ($ra, $rb) = (refaddr $a, refaddr $b);
defined($ra) or croak("arg 1 to $me was not a reference");
defined($rb) or croak("arg 2 to $me was not a reference");
$ra == $rb;
}
my ($_ENC) = Number::Nary::n_codec([ 2 .. 9, 'A', 'C' .. 'R', 'T' .. 'Z' ]);
sub random_short_ident {
my ($size) = shift // 1e9;
return $_ENC->( int rand $size );
}
sub pair_lefts {
my (@pairs) = @_;
map { $pairs[$_] } grep { $_ % 2 == 0 } keys @pairs;
}
sub pair_rights {
my (@pairs) = @_;
map { $pairs[$_] } grep { $_ % 2 == 1 } keys @pairs;
}
sub sum {
require List::Util;
return List::Util::reduce(sub { $a + $b }, 0, @_);
}
sub sumof (&@) {
my ($f, @list) = @_;
sum(map $f->($_), @list);
}
sub percent { $_[0] / 100 }
sub json {
JSON->new->ascii(1)->convert_blessed(1)->allow_blessed;
}
1;