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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 { DenomOperationMap, FeeDescription } from "@gnu-taler/taler-util";
import { createPairTimeline } from "@gnu-taler/taler-wallet-core";
import { useState } from "preact/hooks";
import { useAsyncAsHook } from "../../hooks/useAsyncAsHook.js";
import * as wxApi from "../../wxApi.js";
import { Props, State } from "./index.js";
export function useComponentState(
{ onCancel, onSelection, list: exchanges, currentExchange }: Props,
api: typeof wxApi,
): State {
const initialValue = exchanges.findIndex(e => e.exchangeBaseUrl === currentExchange);
if (initialValue === -1) {
throw Error(`wrong usage of ExchangeSelection component, currentExchange '${currentExchange}' is not in the list of exchanges`)
}
const [value, setValue] = useState(String(initialValue));
const hook = useAsyncAsHook(async () => {
// const { exchanges } = await api.listExchanges();
const selectedIdx = parseInt(value, 10);
const selectedExchange =
exchanges.length == 0 ? undefined : exchanges[selectedIdx];
const selected = !selectedExchange
? undefined
: await api.getExchangeDetailedInfo(selectedExchange.exchangeBaseUrl);
const initialExchange =
selectedIdx === initialValue ? undefined : exchanges[initialValue];
const original = !initialExchange
? undefined
: await api.getExchangeDetailedInfo(initialExchange.exchangeBaseUrl);
return { exchanges, selected, original };
}, [value]);
if (!hook) {
return {
status: "loading",
error: undefined,
};
}
if (hook.hasError) {
return {
status: "error-loading",
error: hook,
};
}
const { selected, original } = hook.response;
if (!selected) {
//!selected <=> exchanges.length === 0
return {
status: "no-exchange",
error: undefined,
currency: undefined,
};
}
const exchangeMap = exchanges.reduce(
(prev, cur, idx) => ({ ...prev, [String(idx)]: cur.exchangeBaseUrl }),
{} as Record<string, string>,
);
if (!original) {
// !original <=> selected == original
return {
status: "ready",
exchanges: {
list: exchangeMap,
value: value,
onChange: async (v) => {
setValue(v);
},
},
error: undefined,
onClose: {
onClick: onCancel,
},
selected,
};
}
const pairTimeline: DenomOperationMap<FeeDescription[]> = {
deposit: createPairTimeline(
selected.denomFees.deposit,
original.denomFees.deposit,
),
refresh: createPairTimeline(
selected.denomFees.refresh,
original.denomFees.refresh,
),
refund: createPairTimeline(
selected.denomFees.refund,
original.denomFees.refund,
),
withdraw: createPairTimeline(
selected.denomFees.withdraw,
original.denomFees.withdraw,
)
};
return {
status: "comparing",
exchanges: {
list: exchangeMap,
value: value,
onChange: async (v) => {
setValue(v);
},
},
error: undefined,
onReset: {
onClick: async () => {
setValue(String(initialValue));
},
},
onSelect: {
onClick: async () => {
onSelection(selected.exchangeBaseUrl);
},
},
selected,
pairTimeline,
};
}
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