/* * This file is part of GNU Taler * (C) 2020 Taler Systems S.A. * * GNU Taler is free software; you can redistribute it and/or modify it under the * terms of the GNU General Public License as published by the Free Software * Foundation; either version 3, or (at your option) any later version. * * GNU Taler is distributed in the hope that it will be useful, but WITHOUT ANY * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR * A PARTICULAR PURPOSE. See the GNU General Public License for more details. * * You should have received a copy of the GNU General Public License along with * GNU Taler; see the file COPYING. If not, see */ package net.taler.wallet.payment import android.util.Log import androidx.annotation.UiThread import androidx.lifecycle.LiveData import androidx.lifecycle.MutableLiveData import kotlinx.coroutines.CoroutineScope import kotlinx.coroutines.launch import net.taler.common.ContractTerms import net.taler.lib.common.Amount import net.taler.wallet.TAG import net.taler.wallet.backend.WalletBackendApi import net.taler.wallet.backend.TalerErrorInfo import net.taler.wallet.payment.PayStatus.AlreadyPaid import net.taler.wallet.payment.PayStatus.InsufficientBalance import net.taler.wallet.payment.PreparePayResponse.AlreadyConfirmedResponse import net.taler.wallet.payment.PreparePayResponse.InsufficientBalanceResponse import net.taler.wallet.payment.PreparePayResponse.PaymentPossibleResponse val REGEX_PRODUCT_IMAGE = Regex("^data:image/(jpeg|png);base64,([A-Za-z0-9+/=]+)$") sealed class PayStatus { object None : PayStatus() object Loading : PayStatus() data class Prepared( val contractTerms: ContractTerms, val proposalId: String, val amountRaw: Amount, val amountEffective: Amount ) : PayStatus() data class InsufficientBalance( val contractTerms: ContractTerms, val amountRaw: Amount ) : PayStatus() // TODO bring user to fulfilment URI object AlreadyPaid : PayStatus() data class Error(val error: String) : PayStatus() data class Success(val currency: String) : PayStatus() } class PaymentManager( private val api: WalletBackendApi, private val scope: CoroutineScope, ) { private val mPayStatus = MutableLiveData(PayStatus.None) internal val payStatus: LiveData = mPayStatus @UiThread fun preparePay(url: String) = scope.launch { mPayStatus.value = PayStatus.Loading api.request("preparePay", PreparePayResponse.serializer()) { put("talerPayUri", url) }.onError { handleError("preparePay", it) }.onSuccess { response -> mPayStatus.value = when (response) { is PaymentPossibleResponse -> response.toPayStatusPrepared() is InsufficientBalanceResponse -> InsufficientBalance( response.contractTerms, response.amountRaw ) is AlreadyConfirmedResponse -> AlreadyPaid } } } fun confirmPay(proposalId: String, currency: String) = scope.launch { api.request("confirmPay", ConfirmPayResult.serializer()) { put("proposalId", proposalId) }.onError { handleError("confirmPay", it) }.onSuccess { mPayStatus.postValue(PayStatus.Success(currency)) } } @UiThread fun abortPay() { val ps = payStatus.value if (ps is PayStatus.Prepared) { abortProposal(ps.proposalId) } resetPayStatus() } internal fun abortProposal(proposalId: String) = scope.launch { Log.i(TAG, "aborting proposal") api.request("abortProposal") { put("proposalId", proposalId) }.onError { Log.e(TAG, "received error response to abortProposal") handleError("abortProposal", it) }.onSuccess { mPayStatus.postValue(PayStatus.None) } } @UiThread fun resetPayStatus() { mPayStatus.value = PayStatus.None } private fun handleError(operation: String, error: TalerErrorInfo) { Log.e(TAG, "got $operation error result $error") mPayStatus.value = PayStatus.Error(error.userFacingMsg) } }