CF-Predictor

This extension predicts rating changes for Codeforces. It shows approximate deltas during and after the contest.
当前为 2018-02-01 提交的版本，查看最新版本。
换行
// ==UserScript==
// @name         CF-Predictor
// @version      1.2.1
// @description  This extension predicts rating changes for Codeforces. It shows approximate deltas during and after the contest.
// @author       Originally by WslF, Edited by ZZYSonny
// @match        http://codeforces.com/contest/*/standings*
// @connect      cf-predictor-frontend.herokuapp.com
// @grant        GM_xmlhttpRequest
// @namespace https://gf.qytechs.cn/users/169007
// ==/UserScript==

(function() {
    'use strict';
    var partyNum = 0;
    var deltas = [];
    showDeltas();

    function modifyPartyHtml(index, elem) {
        var delta = 0;

        if (partyNum > 0) {
            var handle = $(elem).find("td:eq(1)").find("a").first().html();
            if (handle) {
                //next 2 lines - fix for legendary grandmaster
                handle = handle.replace('<span class="legendary-user-first-letter">','');
                handle = handle.replace('</span>','');
                if (handle in deltas) {
                    delta = Math.round(deltas[handle]);
                }
            }
        }

        var text;
        if (partyNum == 0) {
            text = "<th class='top right' style='width: 4em;'><span title='Rating change''>&Delta;</span></th>";
        } else {
            var darkClass = "";
            if (partyNum % 2 == 1) {
                darkClass = "dark ";
            }
            if (delta > 0) {
                text = "<td class='" + darkClass + "right'><span style='color:green;font-weight:bold;'>+" + delta + "</span></td>";
            } else {
                text = "<td class='" + darkClass + "right'><span style='color:gray;font-weight:bold;'>" + delta + "</span></td>";
            }
        }

        partyNum++;
        $(elem).append(text);
    }

    function showDeltas() {
        var count = $(".standings").find("tr").length;
        if (count > 2) {
            var contestId = document.location.href.replace(/\D+/ig, ',').substr(1).split(',')[0];
            getDeltas(contestId, function() {
                $(".standings").find("tr").first().find("th").last().removeClass("right");
                $(".standings").find("tr").find("td").removeClass("right");
                $(".standings").find("tr").each(modifyPartyHtml);
                if (count % 2 == 0) {
                    $(".standings").find("tr").last().find("td").last().replaceWith("<td class='smaller bottom dark right'> </td>");
                } else {
                    $(".standings").find("tr").last().find("td").last().replaceWith("<td class='smaller bottom right'> </td>");
                }
            });
        }
    }

    function getDeltas(contestId, callback) {
        var herokuServer = "https://cf-predictor-frontend.herokuapp.com/";
        var page = 	"GetNextRatingServlet?contestId=" + contestId;

        var server = herokuServer + page;
        GM_xmlhttpRequest({
            method: "GET",
            url: server,
            onload: function(res) {
                var text = res.responseText;
                var data = JSON.parse(text);
                for (var i = 0; i < data.result.length; i++) {
                    var handle = data.result[i].handle;
                    var delta = data.result[i].newRating - data.result[i].oldRating;
                    deltas[handle] = delta;
                }
                callback();
            }
        });
    }

})();
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