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/*
This file is part of GNU Taler
(C) 2022-2024 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 {
AbsoluteTime,
ChallengerApi,
Codec,
buildCodecForObject,
codecForAbsoluteTime,
codecForAny,
codecForList,
codecForString,
codecForStringURL,
codecOptional,
} from "@gnu-taler/taler-util";
import { buildStorageKey, useLocalStorage } from "@gnu-taler/web-util/browser";
/**
* Has the information to reach and
* authenticate at the bank's backend.
*/
export type SessionId = {
nonce: string;
clientId: string;
redirectURL: string;
state: string;
};
export type LastChallengeResponse = {
sendCodeLeft: number;
changeTargetLeft: number;
checkPinLeft: number;
nextSend: AbsoluteTime;
transmitted: boolean;
};
interface LastAddress {
address: Record<string, string>;
type: string;
savedAt: AbsoluteTime;
}
export type SessionState = {
completedURL: string | undefined;
lastAddress: Array<LastAddress> | undefined;
};
export const codecForLastAddress = (): Codec<LastAddress> =>
buildCodecForObject<LastAddress>()
.property("address", codecForAny())
.property("type", codecForString())
.property("savedAt", codecForAbsoluteTime)
.build("LastAddress");
export const codecForSessionState = (): Codec<SessionState> =>
buildCodecForObject<SessionState>()
.property("completedURL", codecOptional(codecForStringURL()))
.property("lastAddress", codecOptional(codecForList(codecForLastAddress())))
.build("SessionState");
export interface SessionStateHandler {
state: SessionState | undefined;
start(s: SessionId): void;
saveAddress(type: string, address: Record<string, string>): void;
removeAddress(index: number): void;
sent(info: ChallengerApi.ChallengeCreateResponse): void;
failed(info: ChallengerApi.InvalidPinResponse): void;
completed(info: ChallengerApi.ChallengeRedirect): void;
}
const SESSION_STATE_KEY = buildStorageKey(
"challenger-session",
codecForSessionState(),
);
/**
* Return getters and setters for
* login credentials and backend's
* base URL.
*/
export function useSessionState(): SessionStateHandler {
const { value: state, update } = useLocalStorage(SESSION_STATE_KEY);
return {
state,
start() {
update({
completedURL: undefined,
lastAddress: state?.lastAddress ?? [],
});
},
removeAddress(index) {
const lastAddr = [...(state?.lastAddress ?? [])];
lastAddr.splice(index, 1);
update({
completedURL: undefined,
lastAddress: lastAddr,
});
},
saveAddress(type, address) {
const lastAddr = [...(state?.lastAddress ?? [])];
lastAddr.push({
type,
address: address ?? {},
savedAt: AbsoluteTime.now(),
});
update({
completedURL: undefined,
lastAddress: lastAddr,
});
},
sent(info) {
},
failed(info) {
},
completed(info) {
if (!state) {
update({
completedURL: info.redirect_url,
lastAddress: [],
});
} else {
update({
completedURL: info.redirect_url,
lastAddress: state.lastAddress,
});
}
},
};
}
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