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"use strict";
/**
* Simple cache manager.
*
* refer: https://github.com/mysticatea/eslint-plugin-node/blob/f45c6149be7235c0f7422d1179c25726afeecd83/lib/util/cache.js
*/
Object.defineProperty(exports, "__esModule", { value: true });
exports.createCache = createCache;
const SKIP_TIME = 5000;
/**
* The cache will dispose of each value if the value has not been accessed
* during 5 seconds.
* @returns getter and setter ofr the cache.
*/
function createCache() {
const map = new Map();
/**
* Get the cached value of the given key.
* @param key The key to get.
* @returns The cached value or null.
*/
function get(key) {
const entry = map.get(key);
const now = Date.now();
if (entry) {
if (entry.expire > now) {
entry.expire = now + SKIP_TIME;
return entry.value;
}
map.delete(key);
}
return null;
}
/**
* Set the value of the given key.
* @param key The key to set.
* @param value The value to set.
* @returns
*/
function set(key, value) {
const entry = map.get(key);
const expire = Date.now() + SKIP_TIME;
if (entry) {
entry.value = value;
entry.expire = expire;
}
else {
map.set(key, { value, expire });
}
}
return { get, set };
}
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