87 lines
2.6 KiB
Perl
Executable File
87 lines
2.6 KiB
Perl
Executable File
package DDG::Goodie::Roman;
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# ABSTRACT: Convert between Roman and Arabic numeral systems.
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use strict;
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use DDG::Goodie;
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use Roman;
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use List::Util qw/any/;
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use utf8;
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triggers startend => "roman", "roman numeral", "roman numerals", "roman number",
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"arabic", "arabic numeral", "arabic numerals", "arabic number";
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zci is_cached => 1;
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zci answer_type => "roman_numeral_conversion";
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# These two lists are used to load the converter without any answer.
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my @roman_to_arabic = (
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qr/^convert\s+(?:into|to)\s+arabic\s*(numerals?)?$/i
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);
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my @arabic_to_roman = (
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qr/^convert\s+(?:into|to)\s+roman\s*(numerals?)?$/i
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);
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# These two lists are used to load the converter with an answer.
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my @roman_number_to_arabic = (
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qr/^convert\s+(\D+)\s+(?:into|in|to)\s*arabic\s*(numerals?)?$/i,
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qr/^roman\s+(?:numerals?)?\s*(\D+)$/i,
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qr/^arabic\s+(?:numerals?)?\s*(\D+)$/i,
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qr/^([ivxlcdm]+)\s+(?:into|in|to)?\s+arabic\s*(numerals?)?$/i
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);
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my @arabic_number_to_roman = (
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qr/^convert\s+(\d+)\s+(?:into|in|to)\s*roman\s*(numerals?)?$/i,
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qr/^roman\s+(?:numerals?)?\s*(\d+)$/i,
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qr/^arabic\s+(?:numerals?)?\s*(\d+)$/i,
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qr/^(\d+)\s+(?:into|in|to)?\s+roman\s*(numerals?)?$/i
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);
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handle query => sub {
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my ($query) = @_;
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# By default, we convert from roman to arabic.
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my $input = 'roman';
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my $input_value = '';
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my $output = 'arabic';
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my $output_value = '';
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if (any { $query =~ $_ } @arabic_to_roman) {
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$input = 'arabic';
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$output = 'roman';
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} elsif (any { ($input_value) = $query =~ $_ } @roman_number_to_arabic) {
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if (isroman $input_value) {
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$input_value = uc $input_value;
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$output_value = arabic $input_value;
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} else {
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# Malformed input (not a roman number), we don't trigger the ia.
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return;
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}
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} elsif (any { ($input_value) = $query =~ $_ } @arabic_number_to_roman) {
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$input = 'arabic';
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$output = 'roman';
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$input_value = $input_value;
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$output_value = Roman $input_value;
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} else {
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$input_value = ''; # because of previous assignments with undef.
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return unless any { $query =~ $_ } @roman_to_arabic;
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}
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return 'roman numeral converter', structured_answer => {
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data => {
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subtitle => 'Accepts inputs from 1 - 3999, I - MMMCMXCIX',
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input => $input,
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input_value => $input_value,
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output => $output,
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output_value => $output_value
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},
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templates => {
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group => 'text',
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options => {
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title_content => 'DDH.roman.content',
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}
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}
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};
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};
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1;
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