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import { hooks } from "@gnu-taler/web-util/lib/index.browser";
import { StateUpdater } from "preact/hooks";
/**
* Has the information to reach and
* authenticate at the bank's backend.
*/
export interface BackendStateType {
url?: string;
username?: string;
password?: string;
}
/**
* Return getters and setters for
* login credentials and backend's
* base URL.
*/
type BackendStateTypeOpt = BackendStateType | undefined;
export function useBackendState(
state?: BackendStateType,
): [BackendStateTypeOpt, StateUpdater<BackendStateTypeOpt>] {
const ret = hooks.useLocalStorage("backend-state", JSON.stringify(state));
const retObj: BackendStateTypeOpt = ret[0] ? JSON.parse(ret[0]) : ret[0];
const retSetter: StateUpdater<BackendStateTypeOpt> = function (val) {
const newVal =
val instanceof Function
? JSON.stringify(val(retObj))
: JSON.stringify(val);
ret[1](newVal);
};
return [retObj, retSetter];
}
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