This repository has been archived by the owner on Oct 15, 2022. It is now read-only.
-
Notifications
You must be signed in to change notification settings - Fork 1.8k
Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
add/subtract days/weeks/months/years to/from a date
- Loading branch information
Showing
2 changed files
with
111 additions
and
0 deletions.
There are no files selected for viewing
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Original file line number | Diff line number | Diff line change |
---|---|---|
@@ -0,0 +1,84 @@ | ||
package DDG::Goodie::DateMath; | ||
# ABSTRACT add/subtract days/weeks/months/years to/from a date | ||
|
||
use DDG::Goodie; | ||
use Date::Calc qw( Add_Delta_Days Add_Delta_YM This_Year ); | ||
|
||
triggers any => qw( plus minus + - ); | ||
zci is_cached => 1; | ||
zci answer_type => 'date_math'; | ||
|
||
handle query_lc => sub { | ||
my @param = split /\s+/; | ||
return unless scalar @param == 4; | ||
|
||
my ( $date, $action, $number, $unit ) = @param; | ||
|
||
# check/tweak input | ||
|
||
# default to this year: | ||
my $md_re = '[01]?[0-9]/[0-3]?[0-9]'; | ||
$date .= '/' . This_Year() if $date =~ /^$md_re$/; | ||
return unless $date =~ /^$md_re\/[0-9]{4}$/; | ||
|
||
my %action_map = ( | ||
plus => '+', | ||
'+' => '+', | ||
minus => '-', | ||
'-' => '-', | ||
); | ||
$action = $action_map{$action} || return; | ||
|
||
return unless $number =~ /^\d+$/; | ||
$number = 0 - $number if $action eq '-'; | ||
|
||
$unit =~ s/s$//g; | ||
|
||
# calculate answer | ||
my $sub_map = { | ||
# sub parameters: year, month, day, number | ||
day => sub { | ||
return Add_Delta_Days( @_ ); | ||
}, | ||
week => sub { | ||
$_[3] *= 7; # weeks to days | ||
return Add_Delta_Days( @_ ); | ||
}, | ||
month => sub { | ||
$_[4] = $_[3]; # months | ||
$_[3] = 0; # 0 years | ||
return Add_Delta_YM( @_ ); | ||
}, | ||
year => sub { | ||
push @_, 0; # 0 months | ||
return Add_Delta_YM( @_ ); | ||
}, | ||
}; | ||
|
||
my $sub = $sub_map->{$unit} || return; | ||
my $answer; | ||
eval { | ||
$answer = format_ymd( $sub->( mdy_to_ymd_array( $date ), $number ) ); | ||
}; | ||
return if $@; | ||
|
||
# output, using original @param | ||
$param[0] = $date; # include the optional year | ||
$param[3] = $unit; | ||
$param[3] .= 's' if $param[2] > 1; # plural? | ||
return "@param is $answer"; | ||
}; | ||
|
||
sub mdy_to_ymd_array | ||
{ | ||
my @date = split '/', shift; | ||
return ( $date[2], $date[0], $date[1] ); | ||
} | ||
|
||
sub format_ymd | ||
{ | ||
# ymd array to m/d/y | ||
return join '/', $_[1], $_[2], $_[0]; | ||
} | ||
|
||
1; |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Original file line number | Diff line number | Diff line change |
---|---|---|
@@ -0,0 +1,27 @@ | ||
#!/usr/bin/env perl | ||
|
||
use strict; | ||
use warnings; | ||
use Test::More; | ||
use DDG::Test::Goodie; | ||
|
||
zci answer_type => 'date_math'; | ||
zci is_cached => 1; | ||
|
||
ddg_goodie_test( | ||
[qw( | ||
DDG::Goodie::DateMath | ||
)], | ||
'1/1/2012 plus 32 days' => test_zci( '1/1/2012 plus 32 days is 2/2/2012' ), | ||
'1/1 plus 32 days' => test_zci( '1/1/2012 plus 32 days is 2/2/2012' ), | ||
'1/1/2012 plus 5 weeks' => test_zci( '1/1/2012 plus 5 weeks is 2/5/2012' ), | ||
'1/1/2012 plus 5 months' => test_zci( '1/1/2012 plus 5 months is 6/1/2012' ), | ||
'1/1/2012 PLUS 5 years' => test_zci( '1/1/2012 plus 5 years is 1/1/2017' ), | ||
'1/1/2012 plus 1 day' => test_zci( '1/1/2012 plus 1 day is 1/2/2012' ), | ||
'1/1/2012 plus 1 days' => test_zci( '1/1/2012 plus 1 day is 1/2/2012' ), | ||
'1/1/2012 + 1 day' => test_zci( '1/1/2012 + 1 day is 1/2/2012' ), | ||
'1/1/2012 minus 10 days' => test_zci( '1/1/2012 minus 10 days is 12/22/2011' ), | ||
); | ||
|
||
done_testing; | ||
|