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/*
* This file is part of GNU Taler
* (C) 2023 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 androidx.compose.foundation.layout.Box
import androidx.compose.foundation.layout.fillMaxSize
import androidx.compose.material3.CircularProgressIndicator
import androidx.compose.material3.MaterialTheme
import androidx.compose.material3.Text
import androidx.compose.runtime.Composable
import androidx.compose.ui.Alignment.Companion.Center
import androidx.compose.ui.Modifier
import androidx.compose.ui.res.stringResource
import androidx.compose.ui.tooling.preview.Preview
import net.taler.common.Amount
import net.taler.common.ContractTerms
import net.taler.wallet.AmountResult
import net.taler.wallet.R
import net.taler.wallet.compose.TalerSurface
sealed class AmountFieldStatus {
object FixedAmount : AmountFieldStatus()
class Default(
val amountStr: String? = null,
val currency: String? = null,
) : AmountFieldStatus()
object Invalid : AmountFieldStatus()
}
@Composable
fun PayTemplateComposable(
defaultSummary: String?,
amountStatus: AmountFieldStatus,
currencies: List<String>,
payStatus: PayStatus,
onCreateAmount: (String, String) -> AmountResult,
onSubmit: (summary: String?, amount: Amount?) -> Unit,
onError: (resId: Int) -> Unit,
) {
// If wallet is empty, there's no way the user can pay something
if (amountStatus is AmountFieldStatus.Invalid) {
PayTemplateError(stringResource(R.string.receive_amount_invalid))
} else if (currencies.isEmpty()) {
PayTemplateError(stringResource(R.string.payment_balance_insufficient))
} else when (val p = payStatus) {
is PayStatus.None -> PayTemplateOrderComposable(
currencies = currencies,
defaultSummary = defaultSummary,
amountStatus = amountStatus,
onCreateAmount = onCreateAmount,
onError = onError,
onSubmit = onSubmit,
)
is PayStatus.Loading -> PayTemplateLoading()
is PayStatus.AlreadyPaid -> PayTemplateError(stringResource(R.string.payment_already_paid))
is PayStatus.InsufficientBalance -> PayTemplateError(stringResource(R.string.payment_balance_insufficient))
is PayStatus.Pending -> {
val error = p.error
PayTemplateError(if (error != null) {
stringResource(R.string.payment_error, error.userFacingMsg)
} else {
stringResource(R.string.payment_template_error)
})
}
is PayStatus.Prepared -> {} // handled in fragment, will redirect
is PayStatus.Success -> {} // handled by other UI flow, no need for content here
}
}
@Composable
fun PayTemplateError(message: String) {
Box(
modifier = Modifier.fillMaxSize(),
contentAlignment = Center,
) {
Text(
text = message,
style = MaterialTheme.typography.titleLarge,
color = MaterialTheme.colorScheme.error,
)
}
}
@Composable
fun PayTemplateLoading() {
Box(
modifier = Modifier.fillMaxSize(),
contentAlignment = Center,
) {
CircularProgressIndicator()
}
}
@Preview
@Composable
fun PayTemplateLoadingPreview() {
TalerSurface {
PayTemplateComposable(
defaultSummary = "Donation",
amountStatus = AmountFieldStatus.Default("20", "ARS"),
payStatus = PayStatus.Loading,
currencies = listOf("KUDOS", "ARS"),
onCreateAmount = { text, currency ->
AmountResult.Success(amount = Amount.fromString(currency, text))
},
onSubmit = { _, _ -> },
onError = { _ -> },
)
}
}
@Preview
@Composable
fun PayTemplateInsufficientBalancePreview() {
TalerSurface {
PayTemplateComposable(
defaultSummary = "Donation",
amountStatus = AmountFieldStatus.Default("20", "ARS"),
payStatus = PayStatus.InsufficientBalance(
ContractTerms(
"test",
amount = Amount.zero("TESTKUDOS"),
products = emptyList()
), Amount.zero("TESTKUDOS")
),
currencies = listOf("KUDOS", "ARS"),
onCreateAmount = { text, currency ->
AmountResult.Success(amount = Amount.fromString(currency, text))
},
onSubmit = { _, _ -> },
onError = { _ -> },
)
}
}
@Preview
@Composable
fun PayTemplateAlreadyPaidPreview() {
TalerSurface {
PayTemplateComposable(
defaultSummary = "Donation",
amountStatus = AmountFieldStatus.Default("20", "ARS"),
payStatus = PayStatus.AlreadyPaid(transactionId = "transactionId"),
currencies = listOf("KUDOS", "ARS"),
onCreateAmount = { text, currency ->
AmountResult.Success(amount = Amount.fromString(currency, text))
},
onSubmit = { _, _ -> },
onError = { _ -> },
)
}
}
@Preview
@Composable
fun PayTemplateNoCurrenciesPreview() {
TalerSurface {
PayTemplateComposable(
defaultSummary = "Donation",
amountStatus = AmountFieldStatus.Default("20", "ARS"),
payStatus = PayStatus.None,
currencies = emptyList(),
onCreateAmount = { text, currency ->
AmountResult.Success(amount = Amount.fromString(currency, text))
},
onSubmit = { _, _ -> },
onError = { _ -> },
)
}
}
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