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/*
This file is part of GNU Anastasis
(C) 2021-2022 Anastasis SARL
GNU Anastasis is free software; you can redistribute it and/or modify it under the
terms of the GNU Affero General Public License as published by the Free Software
Foundation; either version 3, or (at your option) any later version.
GNU Anastasis 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 Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License along with
GNU Anastasis; see the file COPYING. If not, see <http://www.gnu.org/licenses/>
*/
/**
*
* @author Sebastian Javier Marchano (sebasjm)
*/
import { useEffect, useState } from "preact/hooks";
import { ObservableMap, memoryMap } from "../utils/observable.js";
import { StorageKey, StorageState } from "./useLocalStorage.js";
const storage: ObservableMap<string, any> = memoryMap<any>();
//with initial value
export function useMemoryStorage<Type = string>(
key: string,
defaultValue: Type,
): Required<StorageState<Type>>;
//with initial value
export function useMemoryStorage<Type = string>(
key: string,
): StorageState<Type>;
// impl
export function useMemoryStorage<Type = string>(
key: string,
defaultValue?: Type,
): StorageState<Type> {
const [storedValue, setStoredValue] = useState<Type | undefined>(
(): Type | undefined => {
const prev = storage.get(key);
return prev === undefined ? defaultValue : prev;
},
);
useEffect(() => {
return storage.onUpdate(key, () => {
const newValue = storage.get(key);
setStoredValue(newValue === undefined ? defaultValue : newValue);
});
}, [key]);
const setValue = (value?: Type): void => {
if (value === undefined) {
storage.delete(key);
} else {
storage.set(key, value);
}
};
return {
value: storedValue,
update: setValue,
reset: () => {
setValue(defaultValue);
},
};
}
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