// ==UserScript==
// @name         bilibili vip remover
// @name:zh-CN   bilibili大会员削除
// @namespace    myfreeer
// @version      0.2
// @description  remove the 'become-vip' link, repalce red names to original, and replace emoji to pure text
// @description:zh-CN  去除“成为大会员”链接，将红名替换为原始格式，替换表情为纯文字
// @author       myfreeer
// @match        http://*.bilibili.com/*
// @match        http://*.bilibili.com/
// @license      MIT
// @grant        none
// @downloadURL none
// ==/UserScript==


//code from http://javascript.ruanyifeng.com/dom/mutationobserver.html
(function(win){
  'use strict';

  var listeners = [];
  var doc = win.document;
  var MutationObserver = win.MutationObserver || win.WebKitMutationObserver;
  var observer;

  function ready(selector, fn){
    // 储存选择器和回调函数
    listeners.push({
      selector: selector,
      fn: fn
    });
    if(!observer){
      // 监听document变化
      observer = new MutationObserver(check);

observer.observe(doc.documentElement, {
        childList: true,
        subtree: true
      });
    }
    // 检查该节点是否已经在DOM中
    check();
  }

  function check(){
  // 检查是否匹配已储存的节点
    for(var i = 0; i < listeners.length; i++){
      var listener = listeners[i];
      // 检查指定节点是否有匹配
      var elements = doc.querySelectorAll(listener.selector);
      for(var j = 0; j < elements.length; j++){
        var element = elements[j];
        // 确保回调函数只会对该元素调用一次
        if(!element.ready){
          element.ready = true;
          // 对该节点调用回调函数
          listener.fn.call(element, element);
        }
      }
    }
  }

  // 对外暴露ready
  win.ready = ready;

})(this);

//from https://lvwenhan.com/web-front/374.html
function removeClass(obj, cls){
    var obj_class = ' '+obj.className+' ';//获取 class 内容, 并在首尾各加一个空格. ex) 'abc        bcd' -> ' abc        bcd '
    obj_class = obj_class.replace(/(\s+)/gi, ' ');//将多余的空字符替换成一个空格. ex) ' abc        bcd ' -> ' abc bcd '
    var removed = obj_class.replace(' '+cls+' ', ' ');//在原来的 class 替换掉首尾加了空格的 class. ex) ' abc bcd ' -> 'bcd '
    removed = removed.replace(/(^\s+)|(\s+$)/g, '');//去掉首尾空格. ex) 'bcd ' -> 'bcd'
    obj.className = removed;//替换原来的 class.
}

document.getElementById('i_menu_become_vip').remove();
var vip=document.getElementsByClassName('b-vip-red');
for (var i in vip) removeClass(vip[i], 'b-vip-red');
var vip2=document.getElementsByClassName('b-vip-emoji');
for (var i in vip2) vip2[i].outerHTML=vip2[i].alt;
ready('.b-vip-red', function (e) {
  return removeClass(e, 'b-vip-red');
});
ready('.b-vip-emoji', function (e) {
  return e.outerHTML = e.alt;
});