1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
|
/*
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 { StateUpdater, useState } from "preact/hooks";
export function useLocalStorage(
key: string,
initialValue?: string,
): [string | undefined, StateUpdater<string | undefined>] {
const [storedValue, setStoredValue] = useState<string | undefined>(
(): string | undefined => {
return typeof window !== "undefined"
? window.localStorage.getItem(key) || initialValue
: initialValue;
},
);
const setValue = (
value?: string | ((val?: string) => string | undefined),
): void => {
setStoredValue((p) => {
const toStore = value instanceof Function ? value(p) : value;
if (typeof window !== "undefined") {
if (!toStore) {
window.localStorage.removeItem(key);
} else {
window.localStorage.setItem(key, toStore);
}
}
return toStore;
});
};
return [storedValue, setValue];
}
//TODO: merge with the above function
export function useNotNullLocalStorage(
key: string,
initialValue: string,
): [string, StateUpdater<string>, boolean] {
const [storedValue, setStoredValue] = useState<string>((): string => {
return typeof window !== "undefined"
? window.localStorage.getItem(key) || initialValue
: initialValue;
});
const setValue = (value: string | ((val: string) => string)): void => {
const valueToStore = value instanceof Function ? value(storedValue) : value;
setStoredValue(valueToStore);
if (typeof window !== "undefined") {
if (!valueToStore) {
window.localStorage.removeItem(key);
} else {
window.localStorage.setItem(key, valueToStore);
}
}
};
const isSaved = window.localStorage.getItem(key) !== null;
return [storedValue, setValue, isSaved];
}
|
