// ==UserScript==
// @name         知乎免登录
// @namespace    http://tampermonkey.net/
// @version      0.9
// @description  知乎免登录脚本
// @author       You
// @match        https://*.zhihu.com/*
// @grant        none
// ==/UserScript==

(function () {
// 若要开启实验性功能，请将下方 experimentalFunction = false 改成 experimentalFunction = true
  const experimentalFunction = false

  "use strict";
  if (document.location.href.indexOf("/signin?") > -1) {
    window.location.href = "//zhihu.com/search?";
  }


  function htmlObservation(mutationList,observer){
    for(let mutation of mutationList){
      if('attributes' === mutation.type && 'style' === mutation.attributeName){
        if(document.documentElement.style.overflow !== 'auto'){
          document.documentElement.style.overflow = 'auto'
        }
      }
    }
  }

  function bodyObservation(mutationList,observer){
    if(document.getElementsByClassName('signFlowModal')[0]){
      const model = document.getElementsByClassName('Modal-wrapper')[0]
      if(model){
        model.parentNode.removeChild(model)
      }
    }else{
      if(experimentalFunction && document.getElementsByClassName('Modal-backdrop')[0]){
        const backdrop = document.getElementsByClassName('Modal-backdrop')[0]
        if(!backdrop.getAttribute('clickedevent')){
          backdrop.onclick = function(e){
            const closebutton = backdrop.parentNode.getElementsByClassName('Modal-closeButton')[0]
            if(closebutton){
              closebutton.click()
            }
          }
          backdrop.setAttribute('clickedevent',true)
        }
      }
    }
  }

  document.documentElement.style.overflow = 'auto'
  const htmlObserverConfig = {attributes:true}
  const htmlObserver = new MutationObserver(htmlObservation)
  htmlObserver.observe(document.documentElement,htmlObserverConfig)

  const bodyObserverConfig = {childList:true,subtree:true}
  const bodyObserver = new MutationObserver(bodyObservation)
  bodyObserver.observe(document.body,bodyObserverConfig)

  
})();
