Data Storage with Corona SDK

coronasdk-data.lua

--os.remove(system.pathForFile( "data.db", system.DocumentsDirectory))

-- read data
function readData()
	local path = system.pathForFile("data.db", system.DocumentsDirectory)
	local file = io.open(path, "r")
	if (file) then
		data = json.decode(file:read("*a"))
	else
		file = io.open(path, "w")
		file:write("{ \"visits\": 0, \"rated\": \"no\", \"iap\": { \"iapBalloons\": \"no\" } }")
		data = { visits = 0, rated = "no", iap = { iapBalloons = "no" } }
	end
	io.close(file)
end
readData()

-- write data
function writeData()
	os.remove(system.pathForFile( "data.db", system.DocumentsDirectory))
	local path = system.pathForFile("data.db", system.DocumentsDirectory)
	local file = io.open(path, "w")
	file:write("{ \"visits\": ", data.visits ,", \"rated\": \"", data.rated ,"\", \"iap\": { \"iapBalloons\": \"", data.iap.iapBalloons ,"\" } }")
	io.close(file)
	readData()
end