Fast GM Cache System

Lightweight cache with TTL using GM_setValue

K instalaci tototo skriptu si budete muset nainstalovat rozšíření jako Tampermonkey, Greasemonkey nebo Violentmonkey.

You will need to install an extension such as Tampermonkey to install this script.

K instalaci tohoto skriptu si budete muset nainstalovat rozšíření jako Tampermonkey nebo Violentmonkey.

K instalaci tohoto skriptu si budete muset nainstalovat rozšíření jako Tampermonkey nebo Userscripts.

You will need to install an extension such as Tampermonkey to install this script.

K instalaci tohoto skriptu si budete muset nainstalovat manažer uživatelských skriptů.

(Už mám manažer uživatelských skriptů, nechte mě ho nainstalovat!)

You will need to install an extension such as Stylus to install this style.

You will need to install an extension such as Stylus to install this style.

You will need to install an extension such as Stylus to install this style.

You will need to install a user style manager extension to install this style.

You will need to install a user style manager extension to install this style.

You will need to install a user style manager extension to install this style.

(Už mám manažer uživatelských stylů, nechte mě ho nainstalovat!)

// ==UserScript==
// @name         Fast GM Cache System
// @namespace    fast.cache.system
// @version      1.0
// @description  Lightweight cache with TTL using GM_setValue
// @match        *://*/*
// @grant        GM_setValue
// @grant        GM_getValue
// @grant        GM_deleteValue
// @license      MIT
// ==/UserScript==

(function () {
    'use strict';

    const CACHE_PREFIX = "fastcache_";

    const Cache = {

        // 📦 Сохранить значение с временем жизни (в секундах)
        set(key, value, ttlSeconds = 300) {
            const data = {
                value: value,
                expiry: Date.now() + ttlSeconds * 1000
            };
            GM_setValue(CACHE_PREFIX + key, JSON.stringify(data));
        },

        // 📥 Получить значение (null если просрочено)
        get(key) {
            const raw = GM_getValue(CACHE_PREFIX + key, null);
            if (!raw) return null;

            try {
                const data = JSON.parse(raw);

                if (Date.now() > data.expiry) {
                    GM_deleteValue(CACHE_PREFIX + key);
                    return null;
                }

                return data.value;

            } catch {
                GM_deleteValue(CACHE_PREFIX + key);
                return null;
            }
        },

        // 🗑 Удалить вручную
        delete(key) {
            GM_deleteValue(CACHE_PREFIX + key);
        },

        // 🧹 Очистить всё
        clearAll() {
            const keys = Object.keys(localStorage);
            keys.forEach(k => {
                if (k.startsWith(CACHE_PREFIX)) {
                    GM_deleteValue(k);
                }
            });
        }
    };

    // ====== ПРИМЕР ИСПОЛЬЗОВАНИЯ ======

    const cached = Cache.get("userData");

    if (cached) {
        console.log("Из кеша:", cached);
    } else {
        console.log("Создаём новые данные");

        const newData = {
            id: 123,
            name: "FastUser"
        };

        Cache.set("userData", newData, 600); // 10 минут
    }

})();