/*
* 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.Amount
import net.taler.common.ContractTerms
import net.taler.wallet.TAG
import net.taler.wallet.backend.TalerErrorInfo
import net.taler.wallet.backend.WalletBackendApi
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
import org.json.JSONObject
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: TalerErrorInfo) : 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("preparePayForUri", PreparePayResponse.serializer()) {
put("talerPayUri", url)
}.onError {
handleError("preparePayForUri", 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()
}
fun preparePayForTemplate(url: String, summary: String?, amount: Amount?) = scope.launch {
mPayStatus.value = PayStatus.Loading
api.request("preparePayForTemplate", PreparePayResponse.serializer()) {
put("talerPayTemplateUri", url)
put("templateParams", JSONObject().apply {
summary?.let { put("summary", it) }
amount?.let { put("amount", it.toJSONString()) }
})
}.onError {
handleError("preparePayForTemplate", it)
}.onSuccess { response ->
mPayStatus.value = when (response) {
is PaymentPossibleResponse -> response.toPayStatusPrepared()
is InsufficientBalanceResponse -> InsufficientBalance(
contractTerms = response.contractTerms,
amountRaw = response.amountRaw,
)
is AlreadyConfirmedResponse -> AlreadyPaid
}
}
}
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)
}
}