File Coverage

blib/lib/Lingua/LAV/Num2Word.pm

Criterion	Covered	Total	%
statement	25	121	20.6
branch	2	66	3.0
condition	3	51	5.8
subroutine	8	12	66.6
pod	3	3	100.0
total	41	253	16.2

# For Emacs: -*- mode:cperl; mode:folding; coding:utf-8; -*-

package Lingua::LAV::Num2Word;
# ABSTRACT: Number to word conversion in Latvian

use 5.16.0;
use utf8;
use warnings;

# {{{ use block

use Carp;
use Export::Attrs;

# }}}
# {{{ var block
our $VERSION = '0.2603300';
my %token1 = qw( 0 nulle           1 viens          2 divi
                 3 trīs            4 četri          5 pieci
                 6 seši            7 septiņi        8 astoņi
                 9 deviņi          10 desmit         11 vienpadsmit
                 12 divpadsmit     13 trīspadsmit   14 četrpadsmit
                 15 piecpadsmit    16 sešpadsmit     17 septiņpadsmit
                 18 astoņpadsmit   19 deviņpadsmit
               );
my %token2 = qw( 20 divdesmit          30 trīsdesmit
                 40 četrdesmit          50 piecdesmit
                 60 sešdesmit           70 septiņdesmit
                 80 astoņdesmit         90 deviņdesmit
               );

# }}}

# {{{ _decline                      choose singular/plural form

sub _decline {
    my ($count, $singular, $plural) = @_;

    my $last_two = $count % 100;
    my $last_one = $count % 10;

    # teens (11-19) always take plural
    if ($last_two >= 11 && $last_two <= 19) {
        return $plural;
    }

    # last digit 1 => singular
    if ($last_one == 1) {
        return $singular;
    }

    # everything else => plural
    return $plural;
}

# }}}
# {{{ _hundreds                     convert hundreds part

sub _hundreds {
    my ($number) = @_;

    my $h = int($number / 100);

    if ($h == 1) {
        return 'simts';
    }

    return $token1{$h} . ' ' . _decline($h, 'simts', 'simti');
}

# }}}
# {{{ num2lav_cardinal              number to string conversion

sub num2lav_cardinal :Export {
    my $result = '';
    my $number = shift;

    croak 'You should specify a number from interval [0, 999_999_999]'
        if    !defined $number
           || $number !~ m{\A\d+\z}xms
           || $number < 0
           || $number > 999_999_999;

    # 0-19
    if ($number < 20) {
        return $token1{$number};
    }

    # 20-99
    if ($number < 100) {
        my $remainder = $number % 10;
        $result = $token2{$number - $remainder};
        if ($remainder != 0) {
            $result .= ' ' . $token1{$remainder};
        }
        return $result;
    }

    # 100-999
    if ($number < 1_000) {
        my $remainder = $number % 100;
        $result = _hundreds($number);
        if ($remainder != 0) {
            $result .= ' ' . num2lav_cardinal($remainder);
        }
        return $result;
    }

    # 1_000-999_999
    if ($number < 1_000_000) {
        my $remainder = $number % 1_000;
        my $thousands = int($number / 1_000);
        my $suffix    = _decline($thousands, 'tūkstotis', 'tūkstoši');

        if ($thousands == 1) {
            $result = 'viens tūkstotis';
        }
        elsif ($thousands < 20) {
            $result = $token1{$thousands} . ' ' . $suffix;
        }
        else {
            $result = num2lav_cardinal($thousands) . ' ' . $suffix;
        }

        if ($remainder != 0) {
            $result .= ' ' . num2lav_cardinal($remainder);
        }
        return $result;
    }

    # 1_000_000-999_999_999
    if ($number < 1_000_000_000) {
        my $remainder = $number % 1_000_000;
        my $millions  = int($number / 1_000_000);
        my $suffix    = _decline($millions, 'miljons', 'miljoni');

        if ($millions == 1) {
            $result = 'viens miljons';
        }
        elsif ($millions < 20) {
            $result = $token1{$millions} . ' ' . $suffix;
        }
        else {
            $result = num2lav_cardinal($millions) . ' ' . $suffix;
        }

        if ($remainder != 0) {
            $result .= ' ' . num2lav_cardinal($remainder);
        }
        return $result;
    }

    return $result;
}

# }}}


# {{{ num2lav_ordinal                  convert number to ordinal text

sub num2lav_ordinal :Export {
    my $number = shift;

    croak 'You should specify a number from interval [1, 999_999_999]'
        if    !defined $number
           || $number !~ m{\A\d+\z}xms
           || $number < 1
           || $number > 999_999_999;

    # Unique ordinal forms for 1-19 (masculine nominative)
    my %ordinals = (
        1  => 'pirmais',
        2  => 'otrais',
        3  => 'trešais',
        4  => 'ceturtais',
        5  => 'piektais',
        6  => 'sestais',
        7  => 'septītais',
        8  => 'astotais',
        9  => 'devītais',
        10 => 'desmitais',
        11 => 'vienpadsmitais',
        12 => 'divpadsmitais',
        13 => 'trīspadsmitais',
        14 => 'četrpadsmitais',
        15 => 'piecpadsmitais',
        16 => 'sešpadsmitais',
        17 => 'septiņpadsmitais',
        18 => 'astoņpadsmitais',
        19 => 'deviņpadsmitais',
    );

    return $ordinals{$number} if exists $ordinals{$number};

    # Round tens: cardinal + "ais"
    my %ordinal_tens = (
        20 => 'divdesmitais',
        30 => 'trīsdesmitais',
        40 => 'četrdesmitais',
        50 => 'piecdesmitais',
        60 => 'sešdesmitais',
        70 => 'septiņdesmitais',
        80 => 'astoņdesmitais',
        90 => 'deviņdesmitais',
    );

    return $ordinal_tens{$number} if exists $ordinal_tens{$number};

    # Compound 21-99: cardinal tens + ordinal unit
    if ($number > 20 && $number < 100) {
        my $remain = $number % 10;
        my $tens   = $number - $remain;
        return $token2{$tens} . ' ' . num2lav_ordinal($remain);
    }

    # Round hundreds
    if ($number >= 100 && $number < 1000 && $number % 100 == 0) {
        return _hundreds($number) . 'ais';
    }

    # Compound hundreds: cardinal hundreds + ordinal remainder
    if ($number >= 100 && $number < 1000) {
        my $remain = $number % 100;
        return _hundreds($number) . ' ' . num2lav_ordinal($remain);
    }

    # Round thousands
    if ($number >= 1000 && $number < 1_000_000 && $number % 1000 == 0) {
        my $thousands = int($number / 1000);
        my $suffix    = _decline($thousands, 'tūkstošais', 'tūkstošais');

        if ($thousands == 1) {
            return 'tūkstošais';
        }
        return num2lav_cardinal($thousands) . ' ' . $suffix;
    }

    # Compound thousands
    if ($number >= 1000 && $number < 1_000_000) {
        my $thousands = int($number / 1000);
        my $remain    = $number % 1000;
        my $suffix    = _decline($thousands, 'tūkstotis', 'tūkstoši');

        my $prefix;
        if ($thousands == 1) {
            $prefix = 'viens tūkstotis';
        }
        elsif ($thousands < 20) {
            $prefix = $token1{$thousands} . ' ' . $suffix;
        }
        else {
            $prefix = num2lav_cardinal($thousands) . ' ' . $suffix;
        }
        return $prefix . ' ' . num2lav_ordinal($remain);
    }

    # Round millions
    if ($number >= 1_000_000 && $number < 1_000_000_000 && $number % 1_000_000 == 0) {
        my $millions = int($number / 1_000_000);
        if ($millions == 1) {
            return 'miljontais';
        }
        return num2lav_cardinal($millions) . ' miljontais';
    }

    # Compound millions
    if ($number >= 1_000_000 && $number < 1_000_000_000) {
        my $millions = int($number / 1_000_000);
        my $remain   = $number % 1_000_000;
        my $suffix   = _decline($millions, 'miljons', 'miljoni');

        my $prefix;
        if ($millions == 1) {
            $prefix = 'viens miljons';
        }
        elsif ($millions < 20) {
            $prefix = $token1{$millions} . ' ' . $suffix;
        }
        else {
            $prefix = num2lav_cardinal($millions) . ' ' . $suffix;
        }
        return $prefix . ' ' . num2lav_ordinal($remain);
    }

    return;
}

# }}}

# {{{ capabilities              declare supported features

sub capabilities {
    return {
        cardinal => 1,
        ordinal  => 1,
    };
}

# }}}
1;

__END__