46 lines
1.2 KiB
JavaScript
46 lines
1.2 KiB
JavaScript
/** 与首页 guardPage 使用的全页互斥 key 一致 */
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export const PAGE_ACTION_LOCK_KEY = '__page__'
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/**
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* 全页「同一时间只响应一次点击」：任务进行中再次点击直接忽略（无提示）。
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* timeoutMs：避免底层 Promise 永不结束导致永久锁死。
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*/
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export function createTapGuard() {
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const busy = Object.create(null)
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const tokenByKey = Object.create(null)
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return {
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run(key, fn, timeoutMs = 25000) {
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if (busy[key]) {
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return Promise.resolve()
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}
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busy[key] = true
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const token = (tokenByKey[key] = (tokenByKey[key] || 0) + 1)
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let timeoutId
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if (timeoutMs > 0) {
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timeoutId = setTimeout(() => {
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if (busy[key] && tokenByKey[key] === token) {
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busy[key] = false
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try {
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uni.showToast({ title: '操作超时，请重试', icon: 'none', duration: 2000 })
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} catch (e) {}
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}
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}, timeoutMs)
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}
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let p
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try {
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p = Promise.resolve().then(fn)
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} catch (e) {
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if (timeoutId) clearTimeout(timeoutId)
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busy[key] = false
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return Promise.reject(e)
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}
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return p.finally(() => {
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if (timeoutId) clearTimeout(timeoutId)
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if (tokenByKey[key] === token) {
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busy[key] = false
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}
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})
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}
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}
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}
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