// ==UserScript==
// @name         记录上次查看时间
// @version      0.0.1
// @include      https://www.mcbbs.net/*
// @author       xmdhs
// @description 记录上次查看时间。
// @namespace https://xmdhs.top
// @downloadURL none
// ==/UserScript==

(function () {
    let tid;
    try {
        tid = document.querySelector("#pt > div > a:nth-child(9)").href.match(/thread-([0-9]{1,10})-1-1.html/)[1]
    } catch { }
    if (tid > 0) {
        let date = localStorage.getItem("lastview")
        if (date == null) {
            date = {}
        } else {
            date = JSON.parse(date)
        }
        date[tid] = new Date().getTime()
        let tempdate = {}
        if (date.length > 1000){
            let a = 0;
            for (let i in date) {
                a = a + 1
                if (a < 3) {
                    continue;
                }
                tempdate[i] = date[i]
            }
            date = tempdate
        }
        localStorage.setItem("lastview", JSON.stringify(date))
    } else {
        let date = localStorage.getItem("lastview")
        date = JSON.parse(date)
        jq(".s.xst").each(function () {
            let link = jq(this).attr("href")
            let tid = link.match(/thread-([0-9]{1,10})-1-1.html/)[1]
            let atime = date[tid]
            if (atime > 0) {
                jq(this).append('<font color="#ff0000"> [' + time(atime) + ']</font>')
            }
        })
    }

})();

// https://segmentfault.com/a/1190000015992232
function time(time = +new Date()) {
    var date = new Date(time + 8 * 3600 * 1000); // 增加8小时
    return date.toJSON().substr(0, 19).replace('T', ' ');
}