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import type { PageInfo, RequestData, UseFetchProps, UseFetchDataAction } from './typing'
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import { postDataPipeline } from './utils'
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import { watchEffect, ref } from 'vue'
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import type { ComputedRef } from 'vue'
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import { useDebounceFn } from '@vueuse/core'
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import index from '../utils/hooks/useMergedState'
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import { runFunction } from '#/utils/runFunction'
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/**
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* 组合用户的配置和默认值
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*
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* @param param0
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*/
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const mergeOptionAndPageInfo = ({ pageInfo }: UseFetchProps): PageInfo => {
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if (pageInfo) {
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const { current, defaultCurrent, pageSize, defaultPageSize } = pageInfo
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return {
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current: current || defaultCurrent || 1,
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total: 0,
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pageSize: pageSize || defaultPageSize || 10
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}
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}
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return { current: 1, total: 0, pageSize: 10 }
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}
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const useFetchData = <T extends RequestData<any>>(
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getData: undefined | ((params?: { size: number; current: number }) => Promise<T>),
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defaultData: any[] | undefined,
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options: UseFetchProps
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): ComputedRef<UseFetchDataAction> => {
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const umountRef = ref<boolean>(false)
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/** 是否首次加载的指示器 */
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const manualRequestRef = ref<boolean>(options.manual)
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/** 轮询的setTime ID 存储 */
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const pollingSetTimeRef = ref<any>()
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const [list, setList] = index<any[] | undefined>(ref(options?.dataSource), {
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defaultValue: defaultData,
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onChange: options?.onDataSourceChange
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})
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// 表格加载状态
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const setTableLoading = (loading: UseFetchDataAction['loading']) => {
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options.loading.value = loading
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options.onLoadingChange?.(loading)
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}
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const requesting = ref(false)
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const pageInfo = ref()
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watchEffect(() => {
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pageInfo.value = mergeOptionAndPageInfo(options)
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})
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const setPageInfo = (changePageInfo: PageInfo) => {
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pageInfo.value = changePageInfo
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options?.onPageInfoChange
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}
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const pollingLoading = ref(false)
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const setPollingLoading = (value: boolean) => (pollingLoading.value = value)
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// Batching update https://github.com/facebook/react/issues/14259
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const setDataAndLoading = (newData: T[], dataTotal: number) => {
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setList(newData)
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if (pageInfo.value?.total !== dataTotal) {
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setPageInfo({
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...pageInfo.value,
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total: dataTotal || newData.length
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})
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}
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}
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/**
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* 不这样做会导致状态不更新
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*
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* https://github.com/ant-design/pro-components/issues/4390
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*/
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const requestFinally = () => {
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requestAnimationFrame(() => {
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setTableLoading(false)
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setPollingLoading(false)
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})
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}
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// 需要重新请求数据，删除当前页最后一条数据后，自动向前翻页
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let requestPrePage = false
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/** 请求数据 */
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const fetchList = async (isPolling: boolean) => {
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if ((!requestPrePage && (options.loading.value || requesting.value)) || !getData) {
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return []
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}
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// 需要手动触发的首次请求
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if (manualRequestRef.value) {
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manualRequestRef.value = false
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return []
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}
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if (!isPolling) {
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setTableLoading(true)
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} else {
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setPollingLoading(true)
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}
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requesting.value = true
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const { pageSize, current } = pageInfo.value || {}
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try {
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const pageParams =
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options?.pageInfo !== false
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? {
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current,
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size: pageSize
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}
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: undefined
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const result = await getData(pageParams)
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const { records = [], total = 0, ...rest } = result?.data || {}
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// 为防止删除数据后导致页面当前页面数据长度为 0 ,自动翻页到上一页
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if (records.length === 0 && current > 1) {
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requestPrePage = true
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setPageInfo({
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...pageInfo.value,
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current: current - 1
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})
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return []
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} else {
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requestPrePage = false
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}
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const responseData = postDataPipeline<T[]>(
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records!,
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[options.postData].filter(item => item) as any
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)
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setDataAndLoading(responseData, total)
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options.onLoad?.(responseData, rest)
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return responseData
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} catch (e) {
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// 如果没有传递这个方法的话，需要把错误抛出去，以免吞掉错误
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if (options.onRequestError === undefined) throw new Error(e as string)
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if (list === undefined) setList([])
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options.onRequestError(e as Error)
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} finally {
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// 如果需要重新请求，这里状态就不变更了
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if (!requestPrePage) {
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requesting.value = false
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requestFinally()
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}
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}
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return []
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}
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const fetchListDebounce = useDebounceFn(async (isPolling: boolean) => {
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if (pollingSetTimeRef.value) {
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clearTimeout(pollingSetTimeRef.value)
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}
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const msg = await fetchList(isPolling)
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// 把判断要不要轮询的逻辑放到后面来这样可以保证数据是根据当前来
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// 放到请求前面会导致数据是上一次的
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const needPolling = runFunction(options.polling, msg)
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// 如果需要轮询，搞个一段时间后执行
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// 如果解除了挂载，删除一下
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if (needPolling && !umountRef.value) {
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pollingSetTimeRef.value = setTimeout(() => {
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fetchListDebounce(needPolling)
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// 这里判断最小要2000ms，不然一直loading
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}, Math.max(needPolling, 2000))
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}
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return msg
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}, options.debounceTime || 10)
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// 如果轮询结束了，直接销毁定时器
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watchEffect(() => {
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if (!options.polling) {
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clearTimeout(pollingSetTimeRef.value)
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}
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if (options.polling) {
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fetchListDebounce(true)
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}
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})
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// onUnmounted(() => clearTimeout(pollingSetTimeRef.value))
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//
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// onMounted(() => (umountRef.value = false))
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// onUnmounted(() => (umountRef.value = true))
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/** PageIndex 改变的时候自动刷新 */
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watch(
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() => pageInfo.value,
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(currentPageInfo, prePageInfo) => {
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// console.log('页码改变了')
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const { current, pageSize } = pageInfo.value || {}
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const { current: prePage, pageSize: prePageSize } = prePageInfo || {}
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// 如果上次的页码为空或者两次页码等于是没必要查询的
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// 如果 pageSize 发生变化是需要查询的，所以又加了 prePageSize
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if (prePage && prePage === current && prePageSize && prePageSize === pageSize) {
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return
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}
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if ((options.pageInfo && list.value && list.value?.length > pageSize) || 0) {
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return
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}
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// 如果 list 的长度大于 pageSize 的长度
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// 说明是一个假分页
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// (pageIndex - 1 || 1) 至少要第一页
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// 在第一页大于 10
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// 第二页也应该是大于 10
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// if (current !== undefined && list.value && list.value.length <= pageSize) {
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// fetchListDebounce(false)
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// }
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fetchListDebounce(false)
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},
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{ immediate: true }
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)
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watch(
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() => options.effects?.value || [],
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() => {
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fetchListDebounce(false)
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if (!options.manual) {
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manualRequestRef.value = false
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}
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}
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)
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return computed(() => ({
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dataSource: list.value!,
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setDataSource: setList,
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loading: options.loading.value,
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reload: async () => {
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await fetchListDebounce(false)
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},
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pageInfo: pageInfo.value,
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pollingLoading: pollingLoading.value,
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reset: async () => {
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const { pageInfo: optionPageInfo } = options || {}
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const { defaultCurrent = 1, defaultPageSize = 10 } = optionPageInfo || {}
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const initialPageInfo = {
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current: defaultCurrent,
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total: 0,
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pageSize: defaultPageSize
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}
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setPageInfo(initialPageInfo)
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},
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setPageInfo: async info => {
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setPageInfo({
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...pageInfo.value,
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...info
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})
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}
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}))
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}
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export default useFetchData
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