Module:Convert/helper
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Documentation for this module may be created at Module:Convert/helper/doc
-- 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*$') end end -- Remove commas and references (any strip markers) from a number. -- First usage in Template:Infobox_UK_place/dist (June 2018) local function cleanNumber(frame) local args = frame.args local text = stripToNil(args[1]) or '' if text == '' or tonumber(text) then return text end return mw.text.killMarkers(text):gsub(',', '') end -- Format regular input with fraction (MOS-confirmant) into Convert-format "12+3/8" ("+" added). -- First usage in Template:NFL_predraft (August 2017) local function number(frame) --[[ Preprocess a template parameter to translate a number to be used as input for {{convert}}. {{#invoke:convert/helper|number|12 3/8}} → 12+3/8 Input Output 12 12 12 3/8 12+3/8 {{frac|12|3|8}} 12+3/8 12{{frac|3|8}} 12+3/8 12⅜ 12+3/8 Template:Fraction redirects to Template:Frac so either may be used in the input. ]] local args = frame.args local text = stripToNil(args[1]) or '' if text == '' or tonumber(text) then return text -- examples: '', '12', '12.3', '12.3e4', or negative end text = text:gsub(' ', ' '):gsub(' +', ' '):gsub(' *%+ *', '+'):gsub('⁄', '/'):gsub('⁄', '/') local integer, numerator, denominator, rest -- Look for a fraction of form '12 3/8' or '12+3/8' or '3/8'. integer, numerator, denominator = text:match('^(%d+)[ +](%d+)/(%d+)$') 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 {{frac|12|3|8}} or 12{{frac|3|8}} or {{frac|3|8}}. numerator, denominator = text:match('<sup>(%d+)</sup>/<sub>(%d+)</sub></span>') if numerator then integer = text:match('(%d+)<span class="visualhide">') 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, cleanNumber = cleanNumber, }