Module:NumberSpell

Documentation for this module may be created at Module:NumberSpell/doc

-- This module converts a number into its written English form.
-- For example, "2" becomes "two", and "79" becomes "seventy-nine".

local getArgs = require('Module:Arguments').getArgs

local p = {}

local max = 100 -- The maximum number that can be parsed.

local ones = {
	[0] = 'neunhee',
	[1] = 'un',
	[2] = 'daa',
	[3] = 'tree',
	[4] = 'kiare',
	[5] = 'queig',
	[6] = 'shey',
	[7] = 'shiaght',
	[8] = 'hoght',
	[9] = 'nuy'
}

local specials = {
	[10] = 'jeih',
	[11] = 'unnane jeig',
	[12] = 'daa yeig',
	[13] = 'tree jeig',
	[15] = 'queig jeig',
	[18] = 'hoght jeig',
	[20] = 'feed',
	[30] = 'jeih as feed',
	[31] = 'unnane jeig as feed',
	[32] = 'daa yeig as feed',
	[40] = 'daeed',
	[50] = 'lieh cheead',
	[51] = 'unnane jeig as daeed',
	[52] = 'daa yeig as daeed',
	[60] = 'tree feed',
	[70] = 'jeih as tree feed',
	[71] = 'unnane jeig as tree feed',
	[72] = 'daa yeig as tree feed',
	[80] = 'kiare feed',
	[90] = 'jeih as kiare feed',
	[91] = 'unnane jeig as kiare feed',
	[92] = 'daa yeig as kiare feed',
	[100] = 'keead'
}

local formatRules = {
	{num = 92, rule = 'daa yeig as kiare feed'},
	{num = 91, rule = 'unnane jeig as kiare feed'},
	{num = 90, rule = '%s jeig as kiare feed'},
	{num = 80, rule = '%s as kiare feed'},
	{num = 72, rule = 'daa yeig as tree feed'},
	{num = 71, rule = 'unnane jeig as tree feed'},
	{num = 70, rule = 'seventy-%s'},
	{num = 60, rule = '%s as tree feed'},
	{num = 52, rule = 'daa yeig as daeed'},
	{num = 51, rule = 'unnane jeig as daeed'},
	{num = 50, rule = '%s jeig as daeed'},
	{num = 40, rule = '%s as daeed'},
	{num = 32, rule = 'daa yeig as feed'},
	{num = 31, rule = 'unnane jeig as feed'},
	{num = 30, rule = '%s jeig as feed'},
	{num = 20, rule = '%s as feed'},
	{num = 10, rule = '%s jeig'}
}

function p.main(frame)
	local args = getArgs(frame)
	local num = tonumber(args[1])
	local success, result = pcall(p._main, num)
	if success then
		return result
	else
		return string.format('<strong class="error">Error: %s</strong>', result) -- "result" is the error message.
	end
	return p._main(num)
end

function p._main(num)
	if type(num) ~= 'number' or math.floor(num) ~= num or num < 0 or num > max then
		error('input must be an integer between 0 and ' .. tostring(max), 2)
	end
	-- Check for numbers from 0 to 9.
	local onesVal = ones[num]
	if onesVal then
		return onesVal
	end
	-- Check for special numbers.
	local specialVal = specials[num]
	if specialVal then
		return specialVal
	end
	-- Construct the number from its format rule.
	onesVal = ones[num % 10]
	if not onesVal then
		error('Unexpected error parsing input ' .. tostring(num))
	end
	for i, t in ipairs(formatRules) do
		if num >= t.num then
			return string.format(t.rule, onesVal)
		end
	end
	error('No format rule found for input ' .. tostring(num))
end

return p