Hack olm by Bảo Ngọc
ของเมื่อวันที่
// ==UserScript==
// @name Hack olm
// @namespace http://tampermonkey.net/
// @version 1.0
// @description Hack olm by Bảo Ngọc
// @author Trần Bảo Ngọc
// @match https://olm.vn/*
// @grant unsafeWindow
// @run-at document-start
// ==/UserScript==
(function() {
'use strict';
const TARGET_URL_KEYWORD = 'get-question-of-ids';
function decodeBase64Utf8(base64) {
try {
const binaryString = atob(base64);
const bytes = new Uint8Array(binaryString.length);
for (let i = 0; i < binaryString.length; i++) {
bytes[i] = binaryString.charCodeAt(i);
}
return new TextDecoder('utf-8').decode(bytes);
} catch (e) {
console.error("Lỗi giải mã Base64:", e);
return 'Lỗi giải mã nội dung!';
}
}
class AnswerDisplay {
constructor() {
this.isVisible = true;
this.dragState = { isDragging: false, startX: 0, startY: 0, initialX: 0, initialY: 0 };
this.onMouseDown = this.onMouseDown.bind(this);
this.onMouseMove = this.onMouseMove.bind(this);
this.onMouseUp = this.onMouseUp.bind(this);
this.onKeyDown = this.onKeyDown.bind(this);
}
init() {
this.injectCSS();
this.createUI();
this.addEventListeners();
}
injectCSS() {
const styles = `
@keyframes gradient-animation {
0% { background-position: 0% 50%; }
50% { background-position: 100% 50%; }
100% { background-position: 0% 50%; }
}
#olm-answers-container {
position: fixed; top: 10px; right: 10px; width: 450px; max-height: 90vh;
border: 1px solid #cccccc; border-radius: 8px;
box-shadow: 0 6px 20px rgba(0, 0, 0, 0.2); z-index: 10000;
display: flex; flex-direction: column; font-size: 14px; resize: both;
overflow: hidden; transition: opacity 0.2s, transform 0.2s;
color: #333;
background: linear-gradient(45deg, #e0f7fa, #d1c4e9, #fce4ec, #e0f7fa);
background-size: 400% 400%;
animation: gradient-animation 20s ease infinite;
}
#olm-answers-container.hidden {
opacity: 0; transform: scale(0.95); pointer-events: none;
}
.olm-answers-header {
padding: 10px 15px; background-color: rgba(255, 255, 255, 0.4); border-bottom: 1px solid #cccccc;
cursor: move; user-select: none; font-weight: bold;
text-align: center;
}
#olm-answers-content {
padding: 10px; margin: 0; flex-grow: 1; overflow-y: auto;
background-color: rgba(255, 255, 255, 0.8);
}
#olm-answers-content::-webkit-scrollbar { width: 8px; }
#olm-answers-content::-webkit-scrollbar-track { background: #f1f1f1; }
#olm-answers-content::-webkit-scrollbar-thumb { background: #888; border-radius: 4px; }
#olm-answers-content::-webkit-scrollbar-thumb:hover { background: #555; }
`;
const styleSheet = document.createElement("style");
styleSheet.type = "text/css";
styleSheet.innerText = styles;
document.head.appendChild(styleSheet);
}
createUI() {
this.container = document.createElement('div');
this.container.id = 'olm-answers-container';
this.header = document.createElement('div');
this.header.className = 'olm-answers-header';
this.header.innerHTML = 'Đáp Án Đúng (Nhấn Shift phải để Ẩn/Hiện)';
this.contentArea = document.createElement('div');
this.contentArea.id = 'olm-answers-content';
this.container.append(this.header, this.contentArea);
const appendToBody = () => document.body.appendChild(this.container);
if (document.body) appendToBody();
else window.addEventListener('DOMContentLoaded', appendToBody);
}
addEventListeners() {
setTimeout(() => {
this.header.addEventListener('mousedown', this.onMouseDown);
window.addEventListener('keydown', this.onKeyDown);
}, 500);
}
onMouseDown(event) {
this.dragState.isDragging = true;
const rect = this.container.getBoundingClientRect();
this.container.style.right = 'auto';
this.container.style.bottom = 'auto';
this.container.style.left = `${rect.left}px`;
this.container.style.top = `${rect.top}px`;
this.dragState.initialX = rect.left;
this.dragState.initialY = rect.top;
this.dragState.startX = event.clientX;
this.dragState.startY = event.clientY;
window.addEventListener('mousemove', this.onMouseMove);
window.addEventListener('mouseup', this.onMouseUp);
}
onMouseMove(event) {
if (!this.dragState.isDragging) return;
event.preventDefault();
const dx = event.clientX - this.dragState.startX;
const dy = event.clientY - this.dragState.startY;
this.container.style.left = `${this.dragState.initialX + dx}px`;
this.container.style.top = `${this.dragState.initialY + dy}px`;
}
onMouseUp() {
this.dragState.isDragging = false;
window.removeEventListener('mousemove', this.onMouseMove);
window.removeEventListener('mouseup', this.onMouseUp);
}
onKeyDown(event) {
if (event.code === 'ShiftRight') {
this.toggleVisibility();
}
}
toggleVisibility() {
this.isVisible = !this.isVisible;
this.container.classList.toggle('hidden', !this.isVisible);
}
findAndFormatAnswers(tempDiv) {
let correctAnswers = tempDiv.querySelectorAll('.correctAnswer');
if (correctAnswers.length > 0) {
return `<ul>${Array.from(correctAnswers).map(ans => `<li>${ans.innerHTML}</li>`).join('')}</ul>`;
}
const fillInInput = tempDiv.querySelector('input[data-accept]');
if (fillInInput) {
const answers = fillInInput.getAttribute('data-accept').split('|').map(a => a.trim());
if (answers.length > 0) {
return `<ul>${answers.map(a => `<li>${a}</li>`).join('')}</ul>`;
}
}
const hintSpan = tempDiv.querySelector('span[class*="dap-an"], span[class*="answer"]');
if(hintSpan && hintSpan.textContent) {
return `<ul><li>${hintSpan.textContent.trim()}</li></ul>`;
}
return null;
}
/**
* Chạy lại hàm render công thức toán gốc của OLM trên một vùng nội dung.
* Điều này đảm bảo tính tương thích cao nhất.
* @param {HTMLElement} element - Vùng chứa nội dung cần render.
*/
renderContentWithOLM(element) {
setTimeout(() => {
// Thử tìm hàm render Katex hoặc Mathjax của OLM trong phạm vi `window`
const renderFunc = unsafeWindow.renderKatex ||
(unsafeWindow.MathJax && (unsafeWindow.MathJax.typeset || (unsafeWindow.MathJax.Hub && unsafeWindow.MathJax.Hub.Queue)));
if (typeof renderFunc === 'function') {
try {
// Gọi hàm render của OLM
if (unsafeWindow.MathJax && unsafeWindow.MathJax.typeset) { // MathJax v3
unsafeWindow.MathJax.typeset([element]);
} else if (unsafeWindow.MathJax && unsafeWindow.MathJax.Hub) { // MathJax v2
unsafeWindow.MathJax.Hub.Queue(["Typeset", unsafeWindow.MathJax.Hub, element]);
} else { // Các hàm render khác như renderKatex
renderFunc(element);
}
} catch (e) {
console.error("Lỗi khi thực thi hàm render của OLM:", e);
}
}
}, 200); // Tăng độ trễ để đảm bảo trang tải xong
}
renderData(data) {
if (!Array.isArray(data)) return;
const responseContainer = document.createElement('div');
const timestamp = new Date().toLocaleTimeString();
responseContainer.innerHTML = `<p style="font-family: monospace; font-size: 12px; background: rgba(0,0,0,0.05); padding: 5px; border-radius: 4px;"><b>Time:</b> ${timestamp}</p>`;
data.forEach(question => {
const decodedContent = decodeBase64Utf8(question.content || '');
if (!decodedContent) return;
const tempDiv = document.createElement('div');
tempDiv.innerHTML = decodedContent;
const answersHtml = this.findAndFormatAnswers(tempDiv);
const questionContentDiv = tempDiv.cloneNode(true);
const choiceBlock = questionContentDiv.querySelector('ol.quiz-list, ul.quiz-list, .interaction, .form-group');
if (choiceBlock) {
choiceBlock.remove();
}
const questionDisplayHtml = questionContentDiv.innerHTML.trim();
const questionDiv = document.createElement('div');
questionDiv.style.cssText = 'padding: 8px; border-left: 3px solid #007bff; margin-bottom: 12px; background: rgba(255,255,255,0.6); border-radius: 0 4px 4px 0;';
questionDiv.innerHTML = `
<div style="font-weight: bold; color: #0056b3; margin-bottom: 5px;">${questionDisplayHtml || question.title}</div>
<div style="font-weight: bold; color: #dc3545; padding: 5px 0 0 10px;">
${answersHtml || '<p style="margin:0; font-style: italic; color: #777;">Không tìm thấy đáp án được đánh dấu.</p>'}
</div>`;
responseContainer.appendChild(questionDiv);
});
this.contentArea.prepend(responseContainer);
// Gọi hàm render mới
this.renderContentWithOLM(this.contentArea);
}
}
const answerUI = new AnswerDisplay();
answerUI.init();
const originalFetch = unsafeWindow.fetch;
unsafeWindow.fetch = function(...args) {
const requestUrl = args[0] instanceof Request ? args[0].url : args[0];
const promise = originalFetch.apply(this, args);
if (requestUrl.includes(TARGET_URL_KEYWORD)) {
promise.then(response => {
if (response.ok) {
response.clone().json().then(data => answerUI.renderData(data)).catch(err => console.error(err));
}
});
}
return promise;
};
const originalSend = XMLHttpRequest.prototype.send;
XMLHttpRequest.prototype.send = function(...args) {
this.addEventListener('load', () => {
if (this.responseURL?.includes(TARGET_URL_KEYWORD) && this.status === 200) {
try {
const data = JSON.parse(this.responseText);
answerUI.renderData(data);
} catch (e) { console.error(e) }
}
});
return originalSend.apply(this, args);
};
})();