diff options
Diffstat (limited to 'packages/taler-wallet-webextension/src/wallet/AddExchange/state.ts')
-rw-r--r-- | packages/taler-wallet-webextension/src/wallet/AddExchange/state.ts | 149 |
1 files changed, 149 insertions, 0 deletions
diff --git a/packages/taler-wallet-webextension/src/wallet/AddExchange/state.ts b/packages/taler-wallet-webextension/src/wallet/AddExchange/state.ts new file mode 100644 index 000000000..fc1762331 --- /dev/null +++ b/packages/taler-wallet-webextension/src/wallet/AddExchange/state.ts @@ -0,0 +1,149 @@ +/* + 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 { useState, useEffect, useCallback } from "preact/hooks"; +import { Props, State } from "./index.js"; +import { ExchangeEntryStatus, TalerConfigResponse, TranslatedString, canonicalizeBaseUrl } from "@gnu-taler/taler-util"; +import { useBackendContext } from "../../context/backend.js"; +import { useAsyncAsHook } from "../../hooks/useAsyncAsHook.js"; +import { WalletApiOperation } from "@gnu-taler/taler-wallet-core"; +import { RecursiveState } from "../../utils/index.js"; +import { HttpResponse, useApiContext } from "@gnu-taler/web-util/browser"; +import { alertFromError } from "../../context/alert.js"; +import { withSafe } from "../../mui/handlers.js"; + +export function useComponentState({ onBack, currency, noDebounce }: Props): RecursiveState<State> { + const [verified, setVerified] = useState< + { url: string; config: TalerConfigResponse } | undefined + >(undefined); + + const api = useBackendContext(); + const hook = useAsyncAsHook(() => + api.wallet.call(WalletApiOperation.ListExchanges, {}), + ); + const walletExchanges = !hook ? [] : hook.hasError ? [] : hook.response.exchanges + const used = walletExchanges.filter(e => e.exchangeEntryStatus === ExchangeEntryStatus.Used); + const preset = walletExchanges.filter(e => e.exchangeEntryStatus === ExchangeEntryStatus.Preset); + + + if (!verified) { + return (): State => { + const { request } = useApiContext(); + const ccc = useCallback(async (str: string) => { + const c = canonicalizeBaseUrl(str) + const found = used.findIndex((e) => e.exchangeBaseUrl === c); + if (found !== -1) { + throw Error("This exchange is already active") + } + const result = await request<TalerConfigResponse>(c, "/keys") + return result + }, [used]) + const { result, value: url, update, error: requestError } = useDebounce<HttpResponse<TalerConfigResponse, unknown>>(ccc, noDebounce ?? false) + const [inputError, setInputError] = useState<string>() + + return { + status: "verify", + error: undefined, + onCancel: onBack, + expectedCurrency: currency, + onAccept: async () => { + if (!url || !result || !result.ok) return; + setVerified({ url, config: result.data }) + }, + result, + knownExchanges: preset.map(e => new URL(e.exchangeBaseUrl)), + url: { + value: url ?? "", + error: inputError ?? requestError, + onInput: withSafe(update, (e) => { + setInputError(e.message) + }) + }, + }; + } + } + + async function onConfirm() { + if (!verified) return; + await api.wallet.call(WalletApiOperation.AddExchange, { + exchangeBaseUrl: canonicalizeBaseUrl(verified.url), + forceUpdate: true, + }); + onBack(); + } + + return { + status: "confirm", + error: undefined, + onCancel: onBack, + onConfirm, + url: verified.url + }; +} + + + +function useDebounce<T>( + onTrigger: (v: string) => Promise<T>, + disabled: boolean, +): { + loading: boolean; + error?: string; + value: string | undefined; + result: T | undefined; + update: (s: string) => void; +} { + const [value, setValue] = useState<string>(); + const [dirty, setDirty] = useState(false); + const [loading, setLoading] = useState(false); + const [result, setResult] = useState<T | undefined>(undefined); + const [error, setError] = useState<string | undefined>(undefined); + + const [handler, setHandler] = useState<any | undefined>(undefined); + + if (!disabled) { + useEffect(() => { + if (!value) return; + clearTimeout(handler); + const h = setTimeout(async () => { + setDirty(true); + setLoading(true); + try { + const result = await onTrigger(value); + setResult(result); + setError(undefined); + setLoading(false); + } catch (e) { + const errorMessage = + e instanceof Error ? e.message : `unknown error: ${e}`; + setError(errorMessage); + setLoading(false); + setResult(undefined); + } + }, 500); + setHandler(h); + }, [value, setHandler, onTrigger]); + } + + return { + error: dirty ? error : undefined, + loading: loading, + result: result, + value: value, + update: disabled ? onTrigger : setValue , + }; +} + |