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/*
* 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 <http://www.gnu.org/licenses/>
*/
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>(PayStatus.None)
internal val payStatus: LiveData<PayStatus> = 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<Unit>("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)
}
}
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