// ==UserScript==
// @name Others' challenge results
// @namespace http://tampermonkey.net/
// @version 2025-09-23
// @description Shows where other people went on a challenge round as you play it, similar to Geoguessr
// @author You
// @match *://geotastic.net/*
// @icon https://www.google.com/s2/favicons?sz=64&domain=geotastic.net
// @grant none
// @run-at document-start
// @license MIT
// ==/UserScript==
// === BEGIN MD5 ===
// credit: https://www.myersdaily.org/joseph/javascript/md5-text.html
function md5cycle(x, k) {
var a = x[0],
b = x[1],
c = x[2],
d = x[3];
a = ff(a, b, c, d, k[0], 7, -680876936);
d = ff(d, a, b, c, k[1], 12, -389564586);
c = ff(c, d, a, b, k[2], 17, 606105819);
b = ff(b, c, d, a, k[3], 22, -1044525330);
a = ff(a, b, c, d, k[4], 7, -176418897);
d = ff(d, a, b, c, k[5], 12, 1200080426);
c = ff(c, d, a, b, k[6], 17, -1473231341);
b = ff(b, c, d, a, k[7], 22, -45705983);
a = ff(a, b, c, d, k[8], 7, 1770035416);
d = ff(d, a, b, c, k[9], 12, -1958414417);
c = ff(c, d, a, b, k[10], 17, -42063);
b = ff(b, c, d, a, k[11], 22, -1990404162);
a = ff(a, b, c, d, k[12], 7, 1804603682);
d = ff(d, a, b, c, k[13], 12, -40341101);
c = ff(c, d, a, b, k[14], 17, -1502002290);
b = ff(b, c, d, a, k[15], 22, 1236535329);
a = gg(a, b, c, d, k[1], 5, -165796510);
d = gg(d, a, b, c, k[6], 9, -1069501632);
c = gg(c, d, a, b, k[11], 14, 643717713);
b = gg(b, c, d, a, k[0], 20, -373897302);
a = gg(a, b, c, d, k[5], 5, -701558691);
d = gg(d, a, b, c, k[10], 9, 38016083);
c = gg(c, d, a, b, k[15], 14, -660478335);
b = gg(b, c, d, a, k[4], 20, -405537848);
a = gg(a, b, c, d, k[9], 5, 568446438);
d = gg(d, a, b, c, k[14], 9, -1019803690);
c = gg(c, d, a, b, k[3], 14, -187363961);
b = gg(b, c, d, a, k[8], 20, 1163531501);
a = gg(a, b, c, d, k[13], 5, -1444681467);
d = gg(d, a, b, c, k[2], 9, -51403784);
c = gg(c, d, a, b, k[7], 14, 1735328473);
b = gg(b, c, d, a, k[12], 20, -1926607734);
a = hh(a, b, c, d, k[5], 4, -378558);
d = hh(d, a, b, c, k[8], 11, -2022574463);
c = hh(c, d, a, b, k[11], 16, 1839030562);
b = hh(b, c, d, a, k[14], 23, -35309556);
a = hh(a, b, c, d, k[1], 4, -1530992060);
d = hh(d, a, b, c, k[4], 11, 1272893353);
c = hh(c, d, a, b, k[7], 16, -155497632);
b = hh(b, c, d, a, k[10], 23, -1094730640);
a = hh(a, b, c, d, k[13], 4, 681279174);
d = hh(d, a, b, c, k[0], 11, -358537222);
c = hh(c, d, a, b, k[3], 16, -722521979);
b = hh(b, c, d, a, k[6], 23, 76029189);
a = hh(a, b, c, d, k[9], 4, -640364487);
d = hh(d, a, b, c, k[12], 11, -421815835);
c = hh(c, d, a, b, k[15], 16, 530742520);
b = hh(b, c, d, a, k[2], 23, -995338651);
a = ii(a, b, c, d, k[0], 6, -198630844);
d = ii(d, a, b, c, k[7], 10, 1126891415);
c = ii(c, d, a, b, k[14], 15, -1416354905);
b = ii(b, c, d, a, k[5], 21, -57434055);
a = ii(a, b, c, d, k[12], 6, 1700485571);
d = ii(d, a, b, c, k[3], 10, -1894986606);
c = ii(c, d, a, b, k[10], 15, -1051523);
b = ii(b, c, d, a, k[1], 21, -2054922799);
a = ii(a, b, c, d, k[8], 6, 1873313359);
d = ii(d, a, b, c, k[15], 10, -30611744);
c = ii(c, d, a, b, k[6], 15, -1560198380);
b = ii(b, c, d, a, k[13], 21, 1309151649);
a = ii(a, b, c, d, k[4], 6, -145523070);
d = ii(d, a, b, c, k[11], 10, -1120210379);
c = ii(c, d, a, b, k[2], 15, 718787259);
b = ii(b, c, d, a, k[9], 21, -343485551);
x[0] = add32(a, x[0]);
x[1] = add32(b, x[1]);
x[2] = add32(c, x[2]);
x[3] = add32(d, x[3]);
}
function cmn(q, a, b, x, s, t) {
a = add32(add32(a, q), add32(x, t));
return add32((a << s) | (a >>> (32 - s)), b);
}
function ff(a, b, c, d, x, s, t) {
return cmn((b & c) | ((~b) & d), a, b, x, s, t);
}
function gg(a, b, c, d, x, s, t) {
return cmn((b & d) | (c & (~d)), a, b, x, s, t);
}
function hh(a, b, c, d, x, s, t) {
return cmn(b ^ c ^ d, a, b, x, s, t);
}
function ii(a, b, c, d, x, s, t) {
return cmn(c ^ (b | (~d)), a, b, x, s, t);
}
function md51(s) {
var n = s.length,
state = [1732584193, -271733879, -1732584194, 271733878],
i;
for (i = 64; i <= s.length; i += 64) {
md5cycle(state, md5blk(s.slice(i - 64, i)));
}
s = s.slice(i - 64);
var tail = [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0];
for (i = 0; i < s.length; i++)
tail[i >> 2] |= s[i] << ((i % 4) << 3);
tail[i >> 2] |= 0x80 << ((i % 4) << 3);
if (i > 55) {
md5cycle(state, tail);
for (i = 0; i < 16; i++) tail[i] = 0;
}
tail[14] = n * 8;
md5cycle(state, tail);
return new Uint8Array((new Int32Array(state)).buffer);
}
/* there needs to be support for Unicode here,
* unless we pretend that we can redefine the MD-5
* algorithm for multi-byte characters (perhaps
* by adding every four 16-bit characters and
* shortening the sum to 32 bits). Otherwise
* I suggest performing MD-5 as if every character
* was two bytes--e.g., 0040 0025 = @%--but then
* how will an ordinary MD-5 sum be matched?
* There is no way to standardize text to something
* like UTF-8 before transformation; speed cost is
* utterly prohibitive. The JavaScript standard
* itself needs to look at this: it should start
* providing access to strings as preformed UTF-8
* 8-bit unsigned value arrays.
*/
function md5blk(s) {
/* I figured global was faster. */
var md5blks = [],
i; /* Andy King said do it this way. */
for (i = 0; i < 64; i += 4) {
md5blks[i >> 2] = s[i] +
(s[i + 1] << 8) +
(s[i + 2] << 16) +
(s[i + 3] << 24);
}
return md5blks;
}
function add32(a, b) {
return (a + b) & 0xFFFFFFFF;
}
// === END MD5 ===
const PASSWORD = "4317969d37f68d4f54eae689d8088eba";
function evpBytesToKey(salt, password, keyLen = 32, ivLen = 16) {
let d = new Uint8Array(0);
let passwdArr = new Uint8Array(PASSWORD.split('').map(k => k.charCodeAt(0)));
while (d.length < (keyLen + ivLen)) {
let rem = d.slice(-16);
let toHash = new Uint8Array(rem.length + passwdArr.length + salt.length);
toHash.set(rem, 0);
toHash.set(passwdArr, rem.length);
toHash.set(salt, rem.length + passwdArr.length);
let addD = md51(toHash);
let newD = new Uint8Array(d.length + addD.length);
newD.set(d, 0);
newD.set(addD, d.length);
d = newD;
}
return {
key: d.slice(0, keyLen),
iv: d.slice(keyLen, keyLen + ivLen)
}
}
async function aesDecrypt(ct, salt) {
const keyIv = evpBytesToKey(salt, PASSWORD);
const cryptoKey = await crypto.subtle.importKey("raw", keyIv.key, "AES-CBC", false, ["decrypt"]);
const decrypted = await crypto.subtle.decrypt({
name: "AES-CBC",
iv: keyIv.iv
}, cryptoKey, ct);
return new TextDecoder().decode(decrypted);
}
async function decodeEncdata(json) {
const salt = Uint8Array.fromHex(json.s);
const ct = Uint8Array.fromBase64(json.ct);
return JSON.parse(await aesDecrypt(ct, salt));
}
const challengeDropsRegex = /getChallengeDrops.php\?id=(\d+)/;
const lastRoundSeenRegex = /updateLastRoundSeen.php/;
const challengePickRegex = /updateChallengePick.php/;
const finishRegex = /finishChallenge.php/;
const itemsRegex = /getItems.php/;
const lineSymbol = {
path: 'M 0,-1 0,1',
strokeOpacity: 1,
scale: 2,
};
window.markersToClear = [];
window.finished = new Set();
var checkInterval = setInterval(function() {
if (typeof google === 'object' && typeof google.maps === 'object' && typeof google.maps.Map === 'function') {
var originalMap = google.maps.Map;
google.maps.Map = function() {
var instance = new originalMap(...arguments);
window.capturedMap = instance
return instance
}
clearInterval(checkInterval); // Stop checking once the module is loaded
}
}, 10);
function getMarkerUrl(itemUid) {
if (!window.items) {
return null;
}
for (var item of window.items) {
if (item.uid === itemUid && item.type == "marker") {
return `https://static.geo.edutastic.de/${item.imageUrl}`;
}
}
}
function fetchChallengeResults(challengeId) {
fetch(`https://backend01.geotastic.net/v1/challenge/getChallengeResults.php?id=${challengeId}`, {
headers: {
'X-Auth-Token': window.localStorage.token
}
}).then(
(result) => {
result.json().then(
(json) => {
window.challengeResults = json
}
)
}
);
}
var oldOpen = XMLHttpRequest.prototype.open;
XMLHttpRequest.prototype.open = function(method, url) {
// starting a challenge
if (method === "GET" && challengeDropsRegex.test(url)) {
window.challengeId = challengeDropsRegex.exec(url)[1];
if (finished.has(window.challengeId)) {
return oldOpen.apply(this, arguments);
}
window.roundNo = -1;
fetchChallengeResults(window.challengeId);
this.addEventListener("load", function() {
const response = JSON.parse(this.responseText);
const encoded = JSON.parse(response.encData);
decodeEncdata(encoded).then((result) => {
window.challengeDrops = result
});
});
}
// new round
else if (method === "POST" && lastRoundSeenRegex.test(url)) {
window.roundNo++;
for (var m of window.markersToClear) {
m.setMap(null);
}
}
// end round
else if (method === "POST" && challengePickRegex.test(url)) {
//find top 5
let topResults = window.challengeResults.data.sort((a, b) => ((b.picks[window.roundNo] ? b.picks[window.roundNo].score : (-1)) - (a.picks[window.roundNo] ? a.picks[window.roundNo].score : (-1)))).slice(0, 5);
window.markersToClear = [];
for (var result of topResults) {
if(!result.picks[window.roundNo]){
continue;
}
let markerItemUid = result.userData.markerItemUid;
let markerUrl = getMarkerUrl(markerItemUid);
let markerSettings = {
position: {
lat: result.picks[window.roundNo].lat,
lng: result.picks[window.roundNo].lng
},
map: window.capturedMap,
};
if (markerUrl) {
markerSettings.icon = markerUrl;
}
window.markersToClear.push(new google.maps.Marker(
markerSettings
));
window.markersToClear.push(new google.maps.Polyline({
path: [{
lat: window.challengeDrops[window.roundNo].lat,
lng: window.challengeDrops[window.roundNo].lng
},
{
lat: result.picks[window.roundNo].lat,
lng: result.picks[window.roundNo].lng
}
],
map: window.capturedMap,
strokeOpacity: 0,
icons: [{
icon: lineSymbol,
offset: "0",
repeat: "15px",
}, ],
}));
}
}
// load items(markers)
else if (method === "GET" && itemsRegex.test(url)) {
this.addEventListener('load', function() {
window.items = JSON.parse(this.responseText).data;
});
} else if (method === "POST" && finishRegex.test(url)) {
window.finished.add(challengeId);
}
return oldOpen.apply(this, arguments);
}
