A Map extended as a Cache. Optional KeyExtractor - Function, optional ValueTransformer - Functions, as well as an optional validityPeriod after which an entry is automatically going to be removed.
Versión del día
Este script no debería instalarse directamente. Es una biblioteca que utilizan otros scripts mediante la meta-directiva de inclusión // @require https://update.greasyfork.org/scripts/405143/815223/SimpleCache.js
// ==UserScript==
// @name SimpleCache
// @namespace hoehleg.userscripts.private
// @version 0.1
// @description A Map extended as a Cache. Optional KeyExtractor - Function, optional ValueTransformer - Functions, as well as an optional validityPeriod after which an entry is automatically going to be removed.
// @author Gerrit Höhle
//
// @grant none
//
// @require https://ajax.googleapis.com/ajax/libs/jquery/3.4.1/jquery.min.js
// ==/UserScript==
/* jshint esnext: true */
/* globals $, jQuery */
const SimpleCache = (() => {
const cloneObject = (obj) => {
if (typeof obj !== 'object' && typeof obj !== 'function' || obj === null) {
return obj;
}
return jQuery.extend(true, {}, obj);
};
return class SimpleCache extends Map {
constructor({ keyExtractor = k => k, setValueTransformer = v => cloneObject(v), getValueTransformer = v => cloneObject(v) } = {}) {
super();
Object.assign(this, { keyExtractor, setValueTransformer, getValueTransformer });
}
get(key) {
const finalKey = this.keyExtractor(key);
return this.getValueTransformer(super.get(finalKey));
}
set(key, value, validityPeriodMs = 0) {
const finalKey = this.keyExtractor(key);
super.set(finalKey, this.setValueTransformer(value));
if (validityPeriodMs > 0) {
setTimeout(() => this.delete(finalKey), validityPeriodMs);
}
return this;
}
has(key) {
return super.has(this.keyExtractor(key));
}
delete(key) {
return super.delete(this.keyExtractor(key));
}
};
})();