92 lines
1.9 KiB
TypeScript
92 lines
1.9 KiB
TypeScript
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/**
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* s: seconds
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* m: minutes
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* h: hours
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* d: day
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* w: week
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* y: year
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* t: time
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*/
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export type ExpiredUnit = 's' | 'm' | 'h' | 'd' | 'w' | 'y' | 't';
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export class StorageUtil {
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static get(storage: Storage, key: string) {
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const value = StorageUtil.parse(storage.getItem(key) || 'null') || null;
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if (value === null) {
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return null;
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}
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if (
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typeof value === 'object' &&
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typeof value._expired !== 'undefined' &&
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value._expired !== 0 &&
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+new Date() > value._expired
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) {
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StorageUtil.remove(storage, key);
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return null;
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}
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return value._value || null;
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}
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static set(
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storage: Storage,
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key: string,
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value: any,
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expiredAt: number = 0,
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expiredUnit: ExpiredUnit = 't'
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) {
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storage.setItem(
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key,
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StorageUtil.stringify({
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_expired: StorageUtil.getExpired(expiredAt, expiredUnit),
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_value: value
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})
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);
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}
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static remove(storage: Storage, key: string) {
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storage.removeItem(key);
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}
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static key(storage: Storage, index: number) {
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return storage.key(index);
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}
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private static getExpired(val: number, unit: ExpiredUnit): number {
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if (val <= 0) {
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return 0;
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}
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const now = +new Date();
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switch (unit) {
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case 's':
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return now + 1000 * val;
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case 'm':
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return now + 1000 * 60 * val;
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case 'h':
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return now + 1000 * 60 * 60 * val;
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case 'd':
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return now + 1000 * 60 * 60 * 24 * val;
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case 'w':
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return now + 1000 * 60 * 60 * 24 * 7 * val;
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case 'y':
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return now + 1000 * 60 * 60 * 24 * 365 * val;
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case 't':
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return now + val;
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}
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return 0;
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}
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private static stringify(value: any) {
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return JSON.stringify(value);
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}
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private static parse(text: string) {
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try {
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return JSON.parse(text) || null;
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} catch (e) {
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return text;
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}
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}
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}
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