AccountRepository.kt

class AccountRepository(context: Context) {

    companion object {
        const val ACCOUNT_NAME = "ABC app account"
        const val ACCOUNT_TYPE = "com.igorwojda.abc"
        const val REFRESH_TOKEN = "refreshToken"
    }

    private val accountManager: AccountManager = AccountManager.get(context)

    private val account: Account?
        get() = accountManager.getAccountsByType(ACCOUNT_TYPE).firstOrNull()

    val isLoggedIn: Boolean
        get() = account != null

    val accessToken: String?
        get() = if (isLoggedIn) account?.let { accountManager.getPassword(it) } else null

    val refreshToken: String?
        get() = if (isLoggedIn) account?.let { accountManager.getUserData(it, REFRESH_TOKEN) } else null

    fun addAccount(accessToken: String, refreshToken: String) {
        val account = Account(ACCOUNT_NAME, ACCOUNT_TYPE)
        accountManager.addAccountExplicitly(account, null, null)
        setTokens(accessToken, refreshToken)
    }

    fun setTokens(accessToken: String, refreshToken: String) {
        accountManager.setPassword(account, accessToken)
        accountManager.setUserData(account, REFRESH_TOKEN, refreshToken)
    }

    fun removeAccount() {
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP_MR1) {
            accountManager.removeAccountExplicitly(Account(ACCOUNT_NAME, ACCOUNT_TYPE))
        } else {
            accountManager.removeAccount(
                account,
                {},
                Handler(Looper.getMainLooper())
            )
        }
    }
}