micro-timestamp.user.js

// ==UserScript==
// @name 逢甲微學分選課為啥不標禮拜幾
// @namespace https://gist.github.com/NightFeather/59a14a0beed3e427c1dba4514b4bb7e0
// @description 逢甲微學分選課為啥不標禮拜幾
// @author Nightfeather
// @copyright Nightfeather (https://github.com/Nightfeather)
// @liscense MIT (https://mit-license.org/)
// @version 0.4.1
// @downloadURL https://gist.github.com/NightFeather/59a14a0beed3e427c1dba4514b4bb7e0/raw/micro-timestamp.user.js
// @updateURL https://gist.github.com/NightFeather/59a14a0beed3e427c1dba4514b4bb7e0/raw/micro-timestamp.user.js
// @include https://myfcu.fcu.edu.tw/main/S3204/S3204_micro_credit.aspx
// @grant none
// ==/UserScript==

(function() {
  function addWeekDay(mutRecs,obs) {
    mutRecs.forEach(function(mutRec) {
      if(!mutRec.addedNodes || mutRec.addedNodes.length <= 0) { return }
      let weekday = "日一二三四五六".split("")
      let matchDate = /\d{4}\/\d{2}\/\d{2}/
      mutRec.addedNodes.forEach(function(node) {
        if(!(node instanceof HTMLTableRowElement)) {
          return
        }
	let el = null

	if (node.children.length == 10)
      	  el = node.querySelector('td:nth-child(9)')
	else if (node.children.length == 7)
	  el = node.querySelector('td:nth-child(7)')

        if(!el) { return }
        let t = el.innerText
        let m = t.match(matchDate)
        if(m) {
          let d = new Date(m[0])
          el.innerText = t.replace(m[0], `${m[0]} (${weekday[d.getDay()]})`)
        }
      })
    })
  }
  function setup(ev) {
    if(typeof DPDate != 'undefined') { return } // well, why the datepicker is an iframe of same uri!?
    if(document.readyState == 'interactive' || document.readyState == 'complete'){
      let mode = document.querySelector('.container > select').value
      let modename = document.querySelector(`.container > select option[value="${mode}"]`).label.trim()
      if(!mode || modename != '通識微學分') {
        console.debug(`not in general credit mode, not interested. current: ${modename}`)
        document.querySelector('.container > select').addEventListener('change', checkMode)
        return
      }
  
      let mut = new MutationObserver(addWeekDay)
      mut.observe(document.querySelector('.container > div'), { childList: true, subtree: true })
      document.remoteEventListener('readystatechange', setup)
    }
  }
  
  function checkMode(ev) {
    let mode = document.querySelector('.container > select').value
    let modename = document.querySelector(`.container > select option[value="${mode}"]`).label.trim()
    if(!mode || modename != '通識微學分') {
      console.debug(`not in general credit mode, not interested. current: ${modename}`)
      return
    }
    console.debug(`in general credit mode, setup.`)
    document.querySelector('.container > select').removeEventListener('change', checkMode)
    setup()
  }
  
  document.addEventListener('readystatechange', setup)
})();