104 lines
2.2 KiB
TypeScript
Executable File
104 lines
2.2 KiB
TypeScript
Executable File
import { RepositorySearchResultItem } from '../../api/api'
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interface CacheWrapper<T> {
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[keyword:string]:Caches<T>
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}
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interface Caches<T> {
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total_page:number
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list:{[page:number]:T[]},
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cache_created_time:Date
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}
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const cache:CacheWrapper<RepositorySearchResultItem> = {}
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/**
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* 查找最旧一条缓存
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* @returns
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*/
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function findOldestCache () {
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const cache_sort = Object.entries(cache).sort((a, b) => a[1].cache_created_time.getTime() - b[1].cache_created_time.getTime())
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const oldest = cache_sort.shift()!
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return {
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page: parseInt(oldest[0], 10),
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cache: oldest[1]
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}
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}
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export function RepositorySearchCache (keyword:string, max_cache_count:number) {
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if (!cache[keyword]) {
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cache[keyword] = {
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list: [],
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total_page: 0,
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cache_created_time: new Date()
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}
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}
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const _cache = cache[keyword]
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const _cache_list = _cache.list
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return {
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/**
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* 读取指定页码的缓存
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* @param {number} page 页码
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* @returns {RepositorySearchResultItem[]|undefined}
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*/
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read (page:number):RepositorySearchResultItem[]|undefined {
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return _cache_list[page]
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},
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/**
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* 添加指定页码的缓存
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* @param {number} page 页码
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* @param {RepositorySearchResultItem[]} data 缓存数据
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* @returns {this}
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*/
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add (page:number, data:RepositorySearchResultItem[]) {
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if (!_cache_list[page] && this.getCount() >= max_cache_count) {
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this.remove(
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findOldestCache().page
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)
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}
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_cache_list[page] = data
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return this
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},
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/**
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* 移除指定页码的缓存
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* @param {number} page 页码
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* @returns {this}
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*/
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remove (page:number) {
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delete _cache_list[page]
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return this
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},
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/**
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* 更新页码总数的缓存
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* @param {number} total 页码总数
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* @returns {this}
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*/
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updateTotalPage (total:number) {
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_cache.total_page = total
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return this
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},
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/**
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* 获取页码总数缓存
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* @returns {number}
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*/
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getTotalPage ():number {
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return _cache.total_page
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},
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/**
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* 获取当前缓存总数
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* @returns {number}
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*/
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getCount ():number {
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return Object.keys(_cache_list).length
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}
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}
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}
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