// ==UserScript==
// @name        Smaller gerritbot comments
// @version     2
// @description Changes gerritbot comments into one-liners.
// @match       https://phabricator.wikimedia.org/*
// @grant       none
// ==/UserScript==

const majorEvents = document.querySelectorAll(".phui-timeline-major-event");
const uselessMessage = "Your browser timezone setting differs from the timezone setting in your profile, click to reconcile.";


function getCleanTitle(me) {
  // Remove the text node: "added a comment."
  title = me.querySelector(".phui-timeline-title")
  title.childNodes.forEach(n => {
    if (n.nodeType == 3) {
      n.remove()
    }
  });
  return title
}


function handleGerritbot(me) {
  content = me.querySelectorAll(".phabricator-remarkup p")
  //link = content[1].children[0]
  lastIDX = content.length - 1
  link = content[lastIDX].children[0]
  text = []
  content.forEach(function(e, i){
    if (i < lastIDX) {
      text = text.concat(e.textContent.split('\n'))
    }
  })
  textContent = text[0].trim()
  textTooltip = text[1].trim()

  changeId = textContent.match(/^Change (\d+)/)[1]
  newText = textContent.replace(/^Change \d+ (.*):$/, '$1')
  link.text = changeId
  // Add repo name and commit message as title for the changeId link
  link.setAttribute('title', textTooltip)

  title = getCleanTitle(me)
  title.append(": Change ", link, " ", newText)
}


function handleStashbot(me) {
  content = me.querySelector(".phabricator-remarkup p")
  
  salSpan = content.querySelector("span")
  ircChannel = salSpan.textContent.match(/.*\((#\S+)\)/)[1]
  salURL = salSpan.querySelector("a").href
  salSpan.remove()
  
  salLink = document.createElement("a")
  salLink.setAttribute("href", salURL)
  salLink.setAttribute("target", "_blank")
  salLink.text = ircChannel
  
  title = getCleanTitle(me)
  title.append(" ", salLink, ": ")
  
  // remove the timestamp from text node
  content.childNodes.forEach(n => {
    if (n.nodeType == 3) {
      n.textContent = n.textContent.trimLeft().replace(/\[[\d-TZ:]+\] /, '')
    }
  })
  title.append(...content.childNodes)
}


majorEvents.forEach(me => {
  modified = false
  
  if (me.querySelector(".phui-handle").text == 'gerritbot') {
    handleGerritbot(me)
    modified = true
  }
  
  if (me.querySelector(".phui-handle").text == 'Stashbot') {
    handleStashbot(me)
    modified = true
  }

  if (modified) {
    // remove the "quote" menu on the right
    me.querySelector(".phui-timeline-menu").remove()
    // remove the original comment content
    me.querySelector(".phui-timeline-core-content").remove()
    // make this event minor (one-liner)
    me.classList.replace("phui-timeline-major-event", "phui-timeline-minor-event")
  }
});