Module:Convert/helper

-- This module provides some functions to prepare template parameters -- for use with Template:Convert. -- This module is not used by Template:Convert or Module:Convert.

local function stripToNil(text) -- If text is a non-empty string, return its trimmed content, -- otherwise return nothing (empty string or not a string). if type(text) == 'string' then return text:match('(%S.-)%s*$') end end

-- Format regular input with fraction (MOS-confirmant) into Convert-format "12+3/8" ("+" added). -- First usage in Template:NFL_predraft (August 2017) local function number(frame) --[[ Preprocess a template parameter to translate a number to be used as input for . 12+3/8 → 12+3/8 Input Output 12 12 12 3/8 12+3/8 ​12 ³⁄₈ 12+3/8 12​³⁄₈ 12+3/8 12⅜ 12+3/8 Template:Fraction redirects to Template:Frac so either may be used in the input. ]] local args = frame.args local text = stripToNil(args[1]) or if text == or tonumber(text) then return text -- examples: , '12', '12.3', '12.3e4', or negative end text = text:gsub(' ', ' '):gsub(' +', ' '):gsub(' *%+ *', '+'):gsub('⁄', '/'):gsub('⁄', '/') local integer, numerator, denominator, rest -- Look for a fraction of form '12 3/8' or '12+3/8' or '3/8'. integer, numerator, denominator = text:match('^(%d+)[ +](%d+)/(%d+)$') if integer then return integer .. '+' .. numerator .. '/' .. denominator end numerator, denominator = text:match('^(%d+)/(%d+)$') if numerator then return numerator .. '/' .. denominator end -- Look for an expanded fraction such as the result of ​12 ³⁄₈ or 12​³⁄₈ or ​³⁄₈. numerator, denominator = text:match('^(%d+)/_(%d+)') if numerator then integer = text:match('(%d+)') or text:match('^(%d+)%s*​<span') or -- Template:Frac outputs zwsp since December 2017 text:match('^(%d+)%s*<span') return (integer and (integer .. '+') or ) .. numerator .. '/' .. denominator end -- Look for a fraction of form '12¾' or '¾'. local fractions = { ['½'] = '1/2', ['⅓'] = '1/3', ['⅔'] = '2/3', ['¼'] = '1/4', ['¾'] = '3/4', ['⅛'] = '1/8', ['⅜'] = '3/8', ['⅝'] = '5/8', ['⅞'] = '7/8', } integer, rest = text:match('^(%d*)%s*(.*)') local expand = fractions[rest] if expand then return (integer == and integer or (integer .. '+')) .. expand end return text end

return { number = number, }