Module:vmf-sortkey

---

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local export = {}
local u = mw.ustring.char

local remove_diacritics = u(0x0300) .. "-" .. u(0x0302) .. u(0x0308) .. u(0x030A) -- grave, acute, circumflex, diaeresis, ring above, cedilla

local oneChar = {
	["ß"] = "ss"
}

function export.makeSortKey(text, lang, sc)
	return mw.ustring.upper(mw.ustring.toNFC(mw.ustring.gsub(mw.ustring.toNFD(mw.ustring.gsub(mw.ustring.lower(text), ".", oneChar)), "[" .. remove_diacritics .. "]", "")))
end

return export