Module:Yesno: Difference between revisions

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local p = {}
-- Function allowing for consistent treatment of boolean-like wikitext input.
-- It works similarly to the template {{yesno}}.
function p.yesno( frame )
 
return function (val, default)
    -- defaults
-- If your wiki uses non-ascii characters for any of "yes", "no", etc., you
    local retvals = {
-- should replace "val:lower()" with "mw.ustring.lower(val)" in the
        yes  = "yes",
-- following line.
        no   = "",
val = type(val) == 'string' and val:lower() or val
        ["¬"] = ""
if val == nil then
    }
return nil
elseif val == true
    -- Allow arguments to override defaults.
or val == 'yes'
    -- 'any' tracks the presence of any arguments at all.
or val == 'y'
    local any = false
or val == 'true'
    for k,v in pairs( frame.args ) do
or val == 't'
        any = true
or val == 'on'
        retvals[k] = v
or tonumber(val) == 1
    end
then
return true
    val = frame.args[1]
elseif val == false
or val == 'no'
    -- According to the template docs, the input should be considered nil
or val == 'n'
    -- only when no params were provided. If any params at all were present,
or val == 'false'
    -- the value must be considered blank. A bit weird, if you ask me.
or val == 'f'
    if (val == nil and not any) or val == '¬' then
or val == 'off'
        return retvals['¬']
or tonumber(val) == 0
    end
then
return false
    val = (val or ''):lower()          -- Coerce to blank if nil; make lowercase.
else
    val = val:match'^%s*(.*%S)' or '' -- Trim whitespace.
return default
end
    if val == '' then
        return retvals['blank'] ~= nil and retvals['blank'] or retvals['no']
    elseif val == 'n' or val == 'no' or val == '0' then
        return retvals['no']
    elseif val == 'y' or val == 'yes' or val == '1' or retvals['def'] == nil then
        return retvals['yes']
    else
        return retvals['def']
    end
end
end
return p

Latest revision as of 07:50, 9 January 2019

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

-- Function allowing for consistent treatment of boolean-like wikitext input.
-- It works similarly to the template {{yesno}}.

return function (val, default)
	-- If your wiki uses non-ascii characters for any of "yes", "no", etc., you
	-- should replace "val:lower()" with "mw.ustring.lower(val)" in the
	-- following line.
	val = type(val) == 'string' and val:lower() or val
	if val == nil then
		return nil
	elseif val == true 
		or val == 'yes'
		or val == 'y'
		or val == 'true'
		or val == 't'
		or val == 'on'
		or tonumber(val) == 1
	then
		return true
	elseif val == false
		or val == 'no'
		or val == 'n'
		or val == 'false'
		or val == 'f'
		or val == 'off'
		or tonumber(val) == 0
	then
		return false
	else
		return default
	end
end