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Penpa Answer Checking

Add a button to count the number of errors for puzzles on penpa.

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         Penpa Answer Checking
// @namespace    http://tampermonkey.net/
// @version      2026-01-07
// @description  Add a button to count the number of errors for puzzles on penpa.
// @author       Leaving Leaves
// @match        https://opt-pan.github.io/penpa-edit/?m=solve&*
// @match        https://swaroopg92.github.io/penpa-edit/#m=solve&*
// @icon         https://opt-pan.github.io/penpa-edit/css/images/logo.png
// @grant        none
// @license      MIT
// ==/UserScript==

(function() {
    'use strict';

    let button_HTML = [
        '<span class="tooltip">',
        '    <button id="check_solution" class="button" value="Check">Check</button>',
        '    <span id="check_text" class="tooltiptext">Check for errors</span>',
        '</span>'].join('');
    document.querySelector("#bottom_button > br").insertAdjacentHTML('beforebegin', button_HTML);
    let check_button = document.getElementById("check_solution");
    check_button.addEventListener('click', function() {
        let solution = pu.solution;
        if (solution === "") {
            alert('No answer checking!');
            return;
        }
        if (typeof(solution)==="string") {
            solution = JSON.parse(solution);
        }
        let error_cnt = pu.make_solution().map((e,i) => e.filter(ee => !(solution[i].includes(ee)))).flat().length;
        alert('Error count: ' + error_cnt);
    });
})();