a_setup.md

Userscript to show the number of teams that have solved each problem on Universal Cup contests.

1. Install Tamper Monkey as a browswer extension.
2. Add the script universal_cup_enhanced.user.js to the extension.

universal_cup_enhanced.user.js

// ==UserScript==
// @name         Universal Cup Enhanced
// @namespace    http://tampermonkey.net/
// @version      2024-06-18
// @description  Provide extra information and tools for problems dashboard
// @author       Marcelo Fornet
// @match        https://contest.ucup.ac/contest/*
// @icon         https://www.google.com/s2/favicons?sz=64&domain=ucup.ac
// @grant        none
// ==/UserScript==


// https://stackoverflow.com/a/2091331/4950797
function getQueryVariable(key, defaultValue) {
    var query = window.location.search.substring(1);
    var vars = query.split('&');
    for (var i = 0; i < vars.length; i++) {
        var pair = vars[i].split('=');
        if (decodeURIComponent(pair[0]) == key) {
            return decodeURIComponent(pair[1]);
        }
    }
    return defaultValue;
}

(function() {
    'use strict';

    let currentPage = window.location.href;
    let match = currentPage.match(/^https?:\/\/contest.ucup.ac\/contest\/\d+(\?.*)?$/);
    if (match === null) {
        return;
    }

    let sortBySolved = getQueryVariable('sortBySolved', 'True') === 'True';

    let qMarkIndex = currentPage.indexOf('?');
    if (qMarkIndex !== -1) {
        currentPage = currentPage.slice(0, qMarkIndex);
    }

    fetch(currentPage + '/standings')
        .then(data => data.text())
        .then(htmlString => {

        const re = /\nscore=[^\n]*\n/
        let matches = htmlString.match(re);

        let standingString = matches[0];
        standingString = standingString.slice(7, -2);
        let standing = JSON.parse(standingString);

        let problems = {};
        for (var team in standing) {
            let submissions = standing[team];
            for (var problem in submissions) {
                let result = submissions[problem];
                if (result[1] !== 0) {
                    if (problem in problems) {
                        problems[problem] = problems[problem] + 1;
                    } else {
                        problems[problem] = 1;
                    }
                }
            }
        }

        let table = document.getElementsByTagName('table')[0];
        let rows = table.getElementsByTagName('tr');


        let header = rows[0];
        let firstColumn = header.getElementsByTagName('th')[0];

        let sortById = document.createElement('a');
        sortById.href = currentPage + '?sortBySolved=False';
        sortById.textContent = '▼';

        firstColumn.textContent = '# ';
        firstColumn.appendChild(sortById);

        let th = document.createElement('th');
        th.textContent = 'Solved by ';

        let sortBySolvedButton = document.createElement('a');

        sortBySolvedButton.href = currentPage + '?sortBySolved=True';
        sortBySolvedButton.textContent = '▼';

        th.appendChild(sortBySolvedButton);

        header.appendChild(th);

        let allRows = [];

        let ix = 1;
        while (ix < rows.length) {
            let problemId = ix - 1;

            let solvedBy = 0;
            if (problemId in problems) {
                solvedBy = problems[problemId];
            }

            let td = document.createElement('td');
            td.textContent = solvedBy;
            rows[ix].appendChild(td);

            allRows.push({'row': rows[ix], solvedBy});

            ix += 1;
        }

        if (sortBySolved) {
            while (ix > 1) {
                ix -= 1;
                table.deleteRow(ix);
            }

            let body = table.getElementsByTagName('tbody')[0];

            allRows.sort((a, b) => b.solvedBy - a.solvedBy);

            for (let row of allRows) {
                body.appendChild(row.row);
            }
        }
    });
})();