shafty023

abstract class EncryptedDatabase : RoomDatabase() {
    companion object {
        fun getInstance(passcode: CharArray, context: Context):
            EncryptedDatabase = buildDatabase(passcode, context)
        
        private fun buildDatabase(
            passcode: CharArray,
            context: Context
        ): EncryptedDatabase {
            // DatabaseKeyMgr is a singleton that all of the above code is wrapped into.

shafty023

/**
 * A storage implementation that enforces whole class serialization/deserialization.
 *
 * This enforces organization of data that needs to be persisted rather than having generic classes
 * with lots of unrelated data.
 *
 * @param context the caller's context
 */
@Singleton
class DataStore(context: Context) {

shafty023

/**
 * A factory that can serialize/deserialize json.
 */
object GsonUtils {
    /**
     * Handles deserializing the json string into a [T] instance.
     *
     * @param json the json to deserialize into an instance of [T]
     * @throws JsonSyntaxException if there is a failure deserializing then this exception is thrown
     */

shafty023

/**
 * Keeps track of current and prior application state.
 *
 * @param dataStore storage
 */
@Singleton
class StateMachine(private val dataStore: DataStore) {
    /**
     * Storage implementation for our state machine.
     *

shafty023

@Singleton
class Preferences(context: Context) {
    private val prefs: SharedPreferences = context.getSharedPreferences("Prefs", Context.MODE_PRIVATE)

    companion object {
        const val PREF_CURRENT_STATE = "CurrentState"
        const val PREF_LAST_KNOWN_ERROR = "LastKnownError"
        const val PREF_LAST_ACTION_PERFORMED = "LastActionPerformed"
    }