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#!/usr/bin/env perl
use strict;
use warnings;
use experimental qw{ say postderef signatures state };
use DateTime;
use List::Util qw{ any };
my @examples = (
{
start_date => '2018-06-28',
offset => 3,
bank_holidays => ['2018-07-03']
},
{ start_date => '2018-06-28', offset => 3 },
{ start_date => '2019-11-01', offset => 3 },
);
for my $example (@examples) {
my $output = banking_day_offset($example);
my $input = '';
$input .= qq{\$startdate = $example->{start_date}};
$input .= qq{, \$offset = $example->{offset}};
$input .=
qq{, \$bank_holidays = [}
. ( join ', ', map { qq{'$_'} } $example->{bank_holidays}->@* ) . ']'
if defined $example->{bank_holidays};
say <<~"END";
Input: $input
Output: $output
END
}
sub banking_day_offset ($obj) {
my @bank_holidays ;
@bank_holidays = $obj->{bank_holidays}->@* if defined $obj->{bank_holidays};
my ( $y, $m, $d ) = split /-/, $obj->{start_date};
my $dt = DateTime->new( year => $y, month => $m, day => $d );
my $c = 0;
while ( $c < $obj->{offset} ) {
$dt->add( days => 1 );
next if $dt->day_of_week == 6; # Saturday
next if $dt->day_of_week == 7; # Sunday
next if any { $dt->ymd eq $_ } @bank_holidays;
$c++;
}
return $dt->ymd;
}
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