-
Notifications
You must be signed in to change notification settings - Fork 1
/
getPageStorage.ts
66 lines (62 loc) · 2.13 KB
/
getPageStorage.ts
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
/*
* Copyright 2019 LABOR.digital
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
* Last modified: 2019.01.11 at 18:39
*/
import {GenericStorage} from '../Entities/GenericStorage';
import {isBrowser} from '../Environment/isBrowser';
import type {PlainObject} from '../Interfaces/PlainObject';
import {isNull} from '../Types/isNull';
import {isString} from '../Types/isString';
import {isUndefined} from '../Types/isUndefined';
declare global
{
interface Window
{
HELFERLEIN_GLOBAL_STORAGE?: PlainObject
}
}
/**
* A fallback local storage if this script is not called from a browser.
*/
let fallbackStorage: GenericStorage | null = null;
/**
* Provides access to a storage object on the window scope. Means multiple libraries may interact
* with the storage and each other. The storage is only available for the current page. Means a refresh/page change
* will flush all elements
*
* The storage will hold a list of GenericStorage objects.
*
* @param namespace
*/
export function getPageStorage(namespace?: string): GenericStorage
{
if (!isBrowser()) {
if (isNull(fallbackStorage)) {
fallbackStorage = new GenericStorage();
}
return fallbackStorage;
}
if (isUndefined(window.HELFERLEIN_GLOBAL_STORAGE)) {
window.HELFERLEIN_GLOBAL_STORAGE = {};
}
if (!isString(namespace)) {
namespace = 'storage-' + (Math.random() + '').replace(/[^0-9]/g, '');
}
if (isUndefined(window.HELFERLEIN_GLOBAL_STORAGE[namespace])) {
window.HELFERLEIN_GLOBAL_STORAGE[namespace] = new GenericStorage();
}
return window.HELFERLEIN_GLOBAL_STORAGE[namespace];
}