UserPreferencesWithSerializer.kt

/* Copyright 2021 Google LLC.	
   SPDX-License-Identifier: Apache-2.0 */

@Serializable
data class UserPreferences(
    val showCompleted: Boolean = false,
    val sortOrder: SortOrder = SortOrder.None
)

object UserPreferencesSerializer : Serializer<UserPreferences> {
  override val defaultValue = UserPreferences()

  override suspend fun readFrom(input: InputStream): UserPreferences {
    try {
      return Json.decodeFromString(
        UserPreferences.serializer(), input.readBytes().decodeToString())
    } catch (serialization: SerializationException) {
      throw CorruptionException("Unable to read UserPrefs", serialization)
    }
  }

  override suspend fun writeTo(t: UserPreferences, output: OutputStream) {
    output.write(Json.encodeToString(UserPreferences.serializer(), t).encodeToByteArray())
  }
}