76 lines
1.7 KiB
TypeScript
76 lines
1.7 KiB
TypeScript
/**
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* 首页商品列表「当次登录」会话 —— 切 tab 不重复拉商品；
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* 城市 / 登录态变化或下拉刷新时再请求。logout 时 clear。
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*/
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import Taro from '@tarojs/taro';
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export type HomeCatalogCache = {
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cityCode: string;
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authKey: string;
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products: unknown[];
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};
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type HomeSession = {
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bootstrapped: boolean;
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cache: HomeCatalogCache | null;
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};
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const STORAGE_KEY = 'dukang_home_catalog_session_v1';
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let memory: HomeSession | null = null;
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function emptySession(): HomeSession {
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return { bootstrapped: false, cache: null };
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}
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function readSession(): HomeSession {
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if (memory) return memory;
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try {
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const raw = Taro.getStorageSync(STORAGE_KEY);
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if (!raw) {
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memory = emptySession();
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return memory;
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}
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const parsed = (typeof raw === 'string' ? JSON.parse(raw) : raw) as Partial<HomeSession>;
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memory = {
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bootstrapped: !!parsed.bootstrapped,
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cache: (parsed.cache as HomeCatalogCache | null) ?? null,
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};
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return memory;
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} catch {
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memory = emptySession();
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return memory;
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}
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}
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function writeSession(next: HomeSession) {
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memory = next;
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try {
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Taro.setStorageSync(STORAGE_KEY, JSON.stringify(next));
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} catch {
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/* ignore quota */
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}
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}
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export function isHomeCatalogBootstrapped(): boolean {
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return readSession().bootstrapped;
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}
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export function getHomeCatalogCache(): HomeCatalogCache | null {
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return readSession().cache;
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}
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export function setHomeCatalogCache(cache: HomeCatalogCache): void {
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writeSession({ bootstrapped: true, cache });
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}
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export function resetHomeCatalogBootstrap(): void {
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memory = emptySession();
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try {
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Taro.removeStorageSync(STORAGE_KEY);
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} catch {
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/* ignore */
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}
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}
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