UUIDProvider.kt

object UUIDProvider {

    private const val NAME = "${BuildConfig.APPLICATION_ID}.LOCK_ID"
    private const val KEY_ID = "${BuildConfig.APPLICATION_ID}.KEY_ID"

    private var cacheId: String? = null

    fun provide(context: Context): String {
        if (cacheId != null) return cacheId!!

        val sharedPreferences = context.getSharedPreferences(NAME, MODE_PRIVATE)
        val currentId = sharedPreferences.getString(KEY_ID, null)

        if (currentId != null) {
            cacheId = currentId
            return currentId
        }

        val newId = UUID.randomUUID().toString()
        sharedPreferences.edit().putString(KEY_ID, newId).apply()

        cacheId = newId
        return newId
    }

}