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-- <nowiki> --- Yesno module for processing of boolean-like wikitext input. -- -- It works similarly to the [[wikipedia:Template:Yesno|Yesno Wikipedia -- template]]. This module is a consistent Lua interface for wikitext -- input from templates. -- -- Wikitext markup used by MediaWiki templates only permit -- string parameters like `"0"`, `"yes"`, `"no"` etc. As Lua -- has a boolean primitive type, Yesno converts this -- wikitext into boolean output for Lua to process. -- -- @script yesno -- @release stable -- @author [[User:Dessamator|Dessamator]] -- @attribution [[wikipedia:User:ATDT|ATDT]] -- @attribution [[wikipedia:User:Mr. Stradivarius|Mr. Stradivarius]] -- @attribution [[wikipedia:Special:PageHistory/Module:Yesno|Other Wikipedia contributors]] -- @see [[wikipedia:Module:Yesno|Original module on -- Wikipedia]] -- @see [[Module:Yesno/testcases|Test cases for this -- module]] -- @param {?boolean|string} value Wikitext boolean-style -- or Lua boolean input. -- * Truthy wikitext input (`'yes'`, `'y'`, `'1'`, -- `'t'` or `'on'`) produces `true` as output. -- * The string representations of Lua's true -- boolean value (`'true'`) also produces `true`. -- * Falsy wikitext input (`'no'`, `'n'`, `'0'`, -- `'f'` or `'off'`) produces `false` as output. -- * The string representation of Lua's false -- boolean value (`'false'`) also produces `false`. -- * Localised text meaning `'yes'` or `'no'` also -- evaluate to `true` or `false` respectively. -- @param[opt] {?boolean|string} default Output to return if -- the Yesno `value` input is unrecognised. -- @return {?boolean} Boolean output corresponding to -- `val`: -- * The strings documented above produce a -- boolean value. -- * A `nil` value produces an output of `nil`. -- As this is falsy, additional logic may be needed -- to treat missing template parameters as truthy. -- * Unrecognised values return the `default` -- parameter. Blank strings are a key example -- of Yesno's unrecognised values and can evaluate -- to `true` if there is a default value. local lower = mw.ustring.lower local msg = mw.message.new local yes = lower(msg('htmlform-yes'):plain()) local no = lower(msg('htmlform-no'):plain()) local en_yes = lower(msg('htmlform-yes'):inLanguage('en'):plain()) local en_no = lower(msg('htmlform-no'):inLanguage('en'):plain()) return function(value, default) value = type(value) == 'string' and lower(value) or value if value == nil then return nil elseif value == true or value == yes or value == en_yes or value == 'y' or value == 'true' or value == 't' or value == 'on' or value == 'enable' or tonumber(value) == 1 then return true elseif value == false or value == no or value == en_no or value == 'n' or value == 'false' or value == 'f' or value == 'off' or value == 'disable' or tonumber(value) == 0 then return false else return default end end -- </nowiki>
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