// String
UserCache.put("string", value: "This is a string")
print("Key: string\nValue: \(UserCache.get("string"))")

// Number
UserCache.put("number", value: 20.3)
print("Key: number\nValue: \(UserCache.get("number"))")

// JSON
UserCache.put("json", value: ["key": "value"])
print("Key: json\nValue: \(UserCache.get("json"))")

// NSData
UserCache.put("data", value: NSData(bytes: [0xFF, 0xD9] as [UInt8], length: 2))
print("Key: data\nValue: \(UserCache.get("data"))")

print("------------------------------")

// Remove an object from the cache
UserCache.remove("string")
print("Remove Key: string\nValue: \(UserCache.get("string"))")

print("------------------------------")

// Set expired key in 2 seconds
UserCache.put("string", value: "This is a string key expired in 2 seconds", seconds: 2)
print("Expired Key: string\nValue: \(UserCache.get("string"))")
print("Sleep 3 seconds")
dispatch_after(
    dispatch_time(
        DISPATCH_TIME_NOW,
        Int64(3 * Double(NSEC_PER_SEC))
    ),
    dispatch_get_main_queue(),
    {
        self.print("Expired Key: string\nValue: \(UserCache.get("string"))")
    }
)

// Clean the cache
// UserCache.clear()

// Clean expired keys from cache
// UserCache.cleanExpirated()

UserCache.get("exist.key")                        // return value for "exist.key"
UserCache.get("not.exist.key")                    // return nil, because "not.exist.key" not exist in cache
UserCache.get("not.exist.key2", defaultValue: 10) // return 10, because "not.exist.key" not exist in cache, but defaultValue is set

UserCache.put("a.key", value: 10)                   // Expired in DEFAULT_CACHE_SECONDS
UserCache.put("a.key2", value: 10, seconds: 5 * 60) // Expired in 5 minutes

UserCache.has("exist.key")     // return true
UserCache.has("not.exist.key") // return false

UserCache.remove("exist.key")     // return value for "exist.key"
UserCache.remove("not.exist.key") // return nil, because "not.exist.key" not exist in cache

UserCache.clear()

UserCache.cleanExpirated()

UserCache.put("a.key2", value: 10, seconds: 5 * 60) // Expired in 5 minutes

// Delay 6 minutes

UserCache.isExpirated("a.key2") // return true