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import { hooks } from "@gnu-taler/web-util/lib/index.browser";
/**
* Has the information to reach and
* authenticate at the bank's backend.
*/
export type BackendState = LoggedIn | LoggedOut
export interface BackendInfo {
url: string;
username: string;
password: string;
}
interface LoggedIn extends BackendInfo {
status: "loggedIn"
}
interface LoggedOut {
status: "loggedOut"
}
export const defaultState: BackendState = { status: "loggedOut" }
export interface BackendStateHandler {
state: BackendState,
clear(): void;
save(info: BackendInfo): void;
}
/**
* Return getters and setters for
* login credentials and backend's
* base URL.
*/
export function useBackendState(): BackendStateHandler {
const [value, update] = hooks.useLocalStorage("backend-state", JSON.stringify(defaultState));
// const parsed = value !== undefined ? JSON.parse(value) : value;
let parsed
try {
parsed = JSON.parse(value!)
} catch {
parsed = undefined
}
const state: BackendState = !parsed?.status ? defaultState : parsed
return {
state,
clear() {
update(JSON.stringify(defaultState))
},
save(info) {
const nextState: BackendState = { status: "loggedIn", ...info }
update(JSON.stringify(nextState))
},
}
}
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