62 lines
1.6 KiB
TypeScript
62 lines
1.6 KiB
TypeScript
import { JournalApi } from "../api/JournalApi";
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const UPLOAD_PERMISSION_KEY = "journal:can-upload";
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let cachedCanUpload: boolean | null = null;
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let pendingCheck: Promise<boolean> | null = null;
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function parseCachedValue(value: unknown): boolean | null {
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if (value === true || value === false) {
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return value;
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}
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if (value === "true") {
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return true;
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}
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if (value === "false") {
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return false;
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}
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return null;
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}
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export default class Permission {
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/** 获取缓存的上传权限（不存在则返回 null） */
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static getCachedUploadPermission(): boolean | null {
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if (cachedCanUpload !== null) {
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return cachedCanUpload;
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}
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try {
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const value = wx.getStorageSync(UPLOAD_PERMISSION_KEY);
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const parsed = parseCachedValue(value);
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if (parsed !== null) {
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cachedCanUpload = parsed;
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return parsed;
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}
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} catch (error) {
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console.warn("读取上传权限缓存失败", error);
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}
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return null;
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}
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/** 检查并缓存上传权限 */
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static async checkAndCacheUploadPermission(): Promise<boolean> {
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if (pendingCheck) {
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return await pendingCheck;
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}
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pendingCheck = (async () => {
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try {
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const canUpload = await JournalApi.canUpload();
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cachedCanUpload = !!canUpload;
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wx.setStorageSync(UPLOAD_PERMISSION_KEY, cachedCanUpload);
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return cachedCanUpload;
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} catch (error) {
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console.error("检查上传权限失败", error);
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const cached = this.getCachedUploadPermission();
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const fallback = cached !== null ? cached : false;
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return fallback;
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} finally {
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pendingCheck = null;
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}
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})();
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return await pendingCheck;
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}
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}
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