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TypeScript

import { RepositorySearchResultItem } from '../../api/api'
interface CacheWrapper<T> {
[keyword:string]:Caches<T>
}
interface Caches<T> {
total_page:number
list:{[page:number]:T[]}
}
const cache:CacheWrapper<RepositorySearchResultItem> = {}
export function RepositorySearchCache (keyword:string, max_cache_count:number) {
if (!cache[keyword]) {
cache[keyword] = {
list: [],
total_page: 0
}
}
const _cache = cache[keyword]
const _cache_list = _cache.list
return {
/**
* 读取指定页码的缓存
* @param {number} page 页码
* @returns {RepositorySearchResultItem[]|undefined}
*/
read (page:number):RepositorySearchResultItem[]|undefined {
return _cache_list[page]
},
/**
* 添加指定页码的缓存
* @param {number} page 页码
* @param {RepositorySearchResultItem[]} data 缓存数据
* @returns {this}
*/
add (page:number, data:RepositorySearchResultItem[]) {
if (!_cache_list[page] && this.getCount() >= max_cache_count) {
this.remove(
parseInt(Object.keys(_cache_list).shift()!, 10)
)
}
_cache_list[page] = data
return this
},
/**
* 移除指定页码的缓存
* @param {number} page 页码
* @returns {this}
*/
remove (page:number) {
delete _cache_list[page]
return this
},
/**
* 更新页码总数的缓存
* @param {number} total 页码总数
* @returns {this}
*/
updateTotalPage (total:number) {
_cache.total_page = total
return this
},
/**
* 获取页码总数缓存
* @returns {number}
*/
getTotalPage ():number {
return _cache.total_page
},
/**
* 获取当前缓存总数
* @returns {number}
*/
getCount ():number {
return Object.keys(_cache_list).length
}
}
}