Module:Appellation

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

-- Appellation pages are titled "<Name> (appellation)" (Naming Convention Reference §3.2),
-- while accession records enter the bare name. These two functions map between the forms.
--   {{#invoke:Appellation|title|Grahan}}               -> Grahan (appellation)
--   {{#invoke:Appellation|name|Grahan (appellation)}}  -> Grahan
-- Both trim whitespace, leave an empty value empty, and never add the suffix twice.
-- Used by Template:Accession (the Has appellation value), Template:Infobox accession (the
-- link) and the Browse/Appellation templates (the display name).
local p = {}

local SUFFIX = ' (appellation)'

local function hasSuffix(s)
	return #s > #SUFFIX and s:sub(-#SUFFIX) == SUFFIX
end

local function arg(frame)
	return mw.text.trim(frame.args[1] or '')
end

function p.title(frame)
	local s = arg(frame)
	if s == '' or hasSuffix(s) then
		return s
	end
	return s .. SUFFIX
end

function p.name(frame)
	local s = arg(frame)
	if hasSuffix(s) then
		return mw.text.trim(s:sub(1, -#SUFFIX - 1))
	end
	return s
end

return p