Replace 0:00 times with previous day 24:00 and make them bold on manaba.tsukuba.ac.jp
// ==UserScript==
// @name Manaba Time Modifier
// @namespace http://tampermonkey.net/
// @version 1.0
// @description Replace 0:00 times with previous day 24:00 and make them bold on manaba.tsukuba.ac.jp
// @author You
// @match https://manaba.tsukuba.ac.jp/ct/*
// @grant none
// ==/UserScript==
(function() {
'use strict';
function modifyTimes() {
// Get all text nodes in the document
const walker = document.createTreeWalker(
document.body,
NodeFilter.SHOW_TEXT,
null,
false
);
const textNodes = [];
let node;
while (node = walker.nextNode()) {
textNodes.push(node);
}
// Regex to match dates with times of 0:00
const timeRegex = /(\d{4})-(\d{2})-(\d{2})\s+0:00/g;
textNodes.forEach(textNode => {
if (timeRegex.test(textNode.textContent)) {
const parent = textNode.parentNode;
const content = textNode.textContent;
// Replace 0:00 with previous day 24:00
const newContent = content.replace(timeRegex, (match, year, month, day) => {
// Create date object and subtract one day
const date = new Date(parseInt(year), parseInt(month) - 1, parseInt(day));
date.setDate(date.getDate() - 1);
// Format previous day
const prevYear = date.getFullYear();
const prevMonth = String(date.getMonth() + 1).padStart(2, '0');
const prevDay = String(date.getDate()).padStart(2, '0');
return `${prevYear}-${prevMonth}-${prevDay} 24:00`;
});
if (newContent !== content) {
// Create a span element to hold the modified content
const span = document.createElement('span');
// Split content and make the time part bold
const modifiedHTML = newContent.replace(/(\d{4}-\d{2}-\d{2}\s+24:00)/g, '<strong>$1</strong>');
span.innerHTML = modifiedHTML;
// Replace the text node with the new span
parent.replaceChild(span, textNode);
}
}
});
}
// Run the modification when the page loads
if (document.readyState === 'loading') {
document.addEventListener('DOMContentLoaded', modifyTimes);
} else {
modifyTimes();
}
// Also run when new content is dynamically loaded
const observer = new MutationObserver((mutations) => {
let shouldCheck = false;
mutations.forEach((mutation) => {
if (mutation.type === 'childList' && mutation.addedNodes.length > 0) {
shouldCheck = true;
}
});
if (shouldCheck) {
setTimeout(modifyTimes, 100);
}
});
observer.observe(document.body, {
childList: true,
subtree: true
});
})();