inline fun SharedPreferences.edit(operation: (SharedPreferences.Editor) -> Unit) {
    val editor = this.edit()
    operation(editor)
    editor.apply()
}

open class PreferenceRepository(val gson: Gson, val sharedPreferences: SharedPreferences) {

    operator inline fun <reified T> get(key: DefaultKey<T>, defaultValue: T? = null): T? {
        val value = sharedPreferences.getString(key.key, "")
        return if (value.isEmpty()) {
            defaultValue
        } else {
            try {
                gson.fromJson(value, T::class.java)
            } catch (e: Exception) {
                defaultValue
            }
        }
    }

    operator inline fun <reified T> set(key: DefaultKey<T>, value: T?) {
        sharedPreferences.edit {
            it.putString(key.key, gson.toJson(value))
        }
    }
}