// ==UserScript==
// @name         EPIC白嫖小助手
// @description  每1小时检测一次是否有可以白嫖的epic游戏
// @namespace    https://bbs.tampermonkey.net.cn/
// @version      0.1.2
// @author       CodFrm
// @grant GM_xmlhttpRequest
// @grant GM_notification
// @grant GM_closeNotification
// @grant GM_openInTab
// @grant GM_getValue
// @grant GM_setValue
// @connect     store-site-backend-static.ak.epicgames.com
// @crontab      0 * * * *
// @supportURL   https://bbs.tampermonkey.net.cn/forum.php?mod=viewthread&tid=644
// @homepage     https://bbs.tampermonkey.net.cn/forum.php?mod=viewthread&tid=644
// ==/UserScript==

let url = "https://store-site-backend-static.ak.epicgames.com/freeGamesPromotions?locale=zh-Hant&country=CN&allowCountries=CN,HK";
return new Promise((resolve, reject) => {
    GM_xmlhttpRequest({
        url: url,
        onload: (resp) => {
            if (resp.status != 200) {
                GM_notification("epic白嫖失败,网站检测错误:" + resp.status);
                resolve();
            } else {
                let games = [];
                let msg = ""
                let elements = resp.response.data.Catalog.searchStore.elements;
                let map = JSON.parse(GM_getValue("epic_notify_1") || "{}");
                let newmap = {};
                for (const key in elements) {
                    if ((elements[key].effectiveDate == "2099-01-01T00:00:00.000Z" || new Date(elements[key].effectiveDate) < new Date())
                        && !map[elements[key].title]) {
                        msg += elements[key].title + "; "
                        let img = "";
                        for (const imgkey in elements[key].keyImages) {
                            if (elements[key].keyImages[imgkey].type == "DieselStoreFrontWide") {
                                img = elements[key].keyImages[imgkey].url;
                                break;
                            }
                        }
                        games.push(
                            {
                                title: elements[key].title,
                                url: "https://www.epicgames.com/store/zh-Hant/p/" + elements[key].productSlug,
                                image: img,
                            });
                        newmap[elements[key].title] = "ok";
                    }
                }
                if (!games.length) {
                    return resolve();
                }
                GM_notification({
                    title: "今日白嫖名单",
                    text: msg,
                    image: games[0].image,
                    buttons: [{
                        title: "我知道了"
                    }, { title: "马上去白嫖" }],
                    onclick(id, btn) {
                        if (btn !== undefined) {
                            GM_setValue("epic_notify_1", JSON.stringify(newmap));
                        }
                        if (btn === 1) {
                            for (let key in games) {
                                GM_openInTab(games[key].url);
                            }
                        }
                        GM_closeNotification(id);
                        resolve();
                    },
                    timeout: 10 * 1000,
                    ondone() {
                        // 系统关闭时不保存通知记录,下次重新通知
                        resolve();
                    }
                });
            }
        },
        onerror() {
            GM_notification("epic白嫖失败,网络异常");
            resolve();
        }
    });
});