PreferencesDataStore6.kt

class SaveUserInfo(private val context: Context) {

    // Create the dataStore and give it a name same as user_pref
    // Create some keys we will use them to store and retrieve the data
    companion object {
        val Context.dataStore: DataStore<Preferences> by preferencesDataStore("user_prefs")
        val USER_AGE_KEY = intPreferencesKey("USER_AGE")
        val USER_NAME_KEY = stringPreferencesKey("USER_NAME")
    }

    // Store user data
    // refer to the data store and using edit
    // we can store values using the keys
    suspend fun storeUserInfo(age: Int, name: String) {
        context.dataStore.edit { preferences ->
            preferences[USER_AGE_KEY] = age
            preferences[USER_NAME_KEY] = name
        }
    }

    // get the user's age
    val userAgeFlow: Flow<Int> = context.dataStore.data.map { preferences ->
        preferences[USER_AGE_KEY] ?: 0
    }

    // get the user's name
    val userNameFlow: Flow<String> = context.dataStore.data.map { preferences ->
        preferences[USER_NAME_KEY] ?: ""
    }
}