return function(cfg) return function(cfgKey, valArray, expectType) ---- Gets a message from the cfg table and formats it if appropriate. -- The function raises an error if the value from the cfg table is not -- of the type expectType. The default type for expectType is 'string'. -- If the table valArray is present, strings such as $1, $2 etc. in the -- message are substituted with values from the table keys [1], [2] etc. -- For example, if the message "foo-message" had the value 'Foo $2 bar $1.', -- message('foo-message',) would return "Foo qux bar baz." -- local msg = cfg[cfgKey] expectType = expectType or 'string' if type(msg) ~= expectType then error('message: type error in message cfg.' .. cfgKey .. ' (' .. expectType .. ' expected, got ' .. type(msg) .. ')', 2) end if not valArray then return msg end local function getMessageVal(match) match = tonumber(match) return valArray[match] or error('message: no value found for key $' .. match .. ' in message cfg.' .. cfgKey, 4) end return mw.ustring.gsub(msg, '$([1-9][0-9]*)', getMessageVal) endend