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/*
This file is part of GNU Taler
(C) 2022 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/>
*/
import { Logger } from "@gnu-taler/taler-util";
import { h, VNode } from "preact";
import { StateUpdater, useEffect, useRef } from "preact/hooks";
import { useBackendContext } from "../context/backend.js";
import { PageStateType, usePageContext } from "../context/pageState.js";
import {
InternationalizationAPI,
useTranslationContext,
} from "@gnu-taler/web-util/lib/index.browser";
import { BackendState } from "../hooks/backend.js";
import { prepareHeaders, validateAmount } from "../utils.js";
const logger = new Logger("WalletWithdrawForm");
export function WalletWithdrawForm({
focus,
currency,
}: {
currency?: string;
focus?: boolean;
}): VNode {
const backend = useBackendContext();
const { pageState, pageStateSetter } = usePageContext();
const { i18n } = useTranslationContext();
let submitAmount: string | undefined = "5.00";
const ref = useRef<HTMLInputElement>(null);
useEffect(() => {
if (focus) ref.current?.focus();
}, [focus]);
return (
<form id="reserve-form" class="pure-form" name="tform">
<p>
<label for="withdraw-amount">{i18n.str`Amount to withdraw:`}</label>
<div style={{ width: "max-content" }}>
<input
type="text"
readonly
class="currency-indicator"
size={currency?.length ?? 5}
maxLength={currency?.length}
tabIndex={-1}
value={currency}
/>
<input
type="number"
ref={ref}
id="withdraw-amount"
name="withdraw-amount"
value={submitAmount}
onChange={(e): void => {
// FIXME: validate using 'parseAmount()',
// deactivate submit button as long as
// amount is not valid
submitAmount = e.currentTarget.value;
}}
/>
</div>
</p>
<p>
<div>
<input
id="select-exchange"
class="pure-button pure-button-primary"
type="submit"
value={i18n.str`Withdraw`}
onClick={() => {
submitAmount = validateAmount(submitAmount);
/**
* By invalid amounts, the validator prints error messages
* on the console, and the browser colourizes the amount input
* box to indicate a error.
*/
if (!submitAmount && currency) return;
createWithdrawalCall(
`${currency}:${submitAmount}`,
backend.state,
pageStateSetter,
i18n,
);
}}
/>
</div>
</p>
</form>
);
}
/**
* This function creates a withdrawal operation via the Access API.
*
* After having successfully created the withdrawal operation, the
* user should receive a QR code of the "taler://withdraw/" type and
* supposed to scan it with their phone.
*
* TODO: (1) after the scan, the page should refresh itself and inform
* the user about the operation's outcome. (2) use POST helper. */
async function createWithdrawalCall(
amount: string,
backendState: BackendState,
pageStateSetter: StateUpdater<PageStateType>,
i18n: InternationalizationAPI,
): Promise<void> {
if (backendState?.status === "loggedOut") {
logger.error("Page has a problem: no credentials found in the state.");
pageStateSetter((prevState) => ({
...prevState,
error: {
title: i18n.str`No credentials given.`,
},
}));
return;
}
let res: Response;
try {
const { username, password } = backendState;
const headers = prepareHeaders(username, password);
// Let bank generate withdraw URI:
const url = new URL(
`access-api/accounts/${backendState.username}/withdrawals`,
backendState.url,
);
res = await fetch(url.href, {
method: "POST",
headers,
body: JSON.stringify({ amount }),
});
} catch (error) {
logger.trace("Could not POST withdrawal request to the bank", error);
pageStateSetter((prevState) => ({
...prevState,
error: {
title: i18n.str`Could not create withdrawal operation`,
description: (error as any).error.description,
debug: JSON.stringify(error),
},
}));
return;
}
if (!res.ok) {
const response = await res.json();
logger.error(
`Withdrawal creation gave response error: ${response} (${res.status})`,
);
pageStateSetter((prevState) => ({
...prevState,
error: {
title: i18n.str`Withdrawal creation gave response error`,
description: response.error.description,
debug: JSON.stringify(response),
},
}));
return;
}
logger.trace("Withdrawal operation created!");
const resp = await res.json();
pageStateSetter((prevState: PageStateType) => ({
...prevState,
withdrawalInProgress: true,
talerWithdrawUri: resp.taler_withdraw_uri,
withdrawalId: resp.withdrawal_id,
}));
}
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