No Spam Results in Google Search

No more spam results in your google search!
当前为 2022-05-01 提交的版本，查看最新版本。
换行
// ==UserScript==
// @name         No Spam Results in Google Search
// @namespace    http://tampermonkey.net/
// @version      0.2
// @description  No more spam results in your google search!
// @author       CY Fung
// @match        https://www.google.com/search?*
// @match        https://www.google.*.*/search?*
// @match        http://*/*
// @match        https://*/*
// @icon         https://www.google.com/s2/favicons?sz=64&domain=google.com
// @grant       GM.setValue
// @grant       GM.getValue
// @grant       GM_getTab
// @grant       GM_saveTab
// @license MIT
// @noframes

// ==/UserScript==

'use strict';

(function () {
    'use strict';

    const [window, document, hostname, location, history] = new Function('return [window, document, location.hostname, location, history];')(); // real window & document object
    let isGoogleSearchPage = hostname.includes('.google')?/\w+\.(google|googleusercontent)\.com(\.\w{0,2}){0,2}/.test(hostname):false;

    function purify(url){
        let nt=null;
        url = `${url}`;
        try{
            nt=new URL(url);
        }catch(e){
            return url;
        }
        return `${nt.origin}${nt.pathname}`;
    }
    function stringify(obj){
        let res = JSON.stringify(obj);
        res=res.replace(/\,\{\"/g,',\n{');
        return res;
    }
    function elementCount(document){
        if(!document) return null;
        try{
            return document.all.length;
        }catch(e){
            return document.getElementsByTagName("*").length;
        }
    }
    function checkSpam(tabObject){
        if( tabObject.hitAt>1 && Date.now()- tabObject.hitAt<30*1000){
            let filteredTimeline = tabObject.timeline.filter(entry=>entry.timeAt>=tabObject.hitAt);
            if(filteredTimeline.length<10 && filteredTimeline.length>=1 && filteredTimeline[0].type=='click'){
                let completeOK=filteredTimeline.filter(entry=>entry.type=='complete').every(entry=>entry.elementCount<20);
                let renderOK= true;
                filteredTimeline.reduce((a,b)=>{
                    if(a && b && a.type=='start' && b.type=='complete' && a.shortHref === b.shortHref){
                        if(b.timeAt-a.timeAt>5000){
                            renderOK = false;
                        }
                    }
                    return b;
                },null);

                //alert([8989, filteredTimeline.length, completeOK, renderOK])
                if(completeOK && renderOK){
                    let histCount = filteredTimeline.filter(entry=>entry.type=='start').length
                    let jsHistCount = filteredTimeline.map(entry=>entry.histCount)
                    let jsHistCountInOrder = true;
                    jsHistCount.reduce((a,b)=>{
                        if(a>-1 && b>-1 && a<=b){
                        }else{
                            jsHistCountInOrder=false;
                        }
                        return b;
                    },0);
                    if(histCount>=2 && jsHistCountInOrder){
                        return {filteredTimeline, jsHistCount};
                    }
                }
            }
        }
    }

    GM_getTab(tabObject=>{

        if(!tabObject.timeline)tabObject.timeline=[];

        if(isGoogleSearchPage){
            //alert(`${tabObject.hitAt} - ${stringify(tabObject.timeline)}`);
            if(tabObject.hitAt<0){
                history.pushState({},null);
            }
            tabObject.timeline.length=0;
            tabObject.hitAt=0;
        }else if(!tabObject.hitAt){
            return;
        }else if(Date.now()-tabObject.hitAt>30*1000){
            tabObject.timeline.length=0;
            tabObject.hitAt=0;
            return;
        }

        // either isGoogleSearchPage or hitTime < 30s

        tabObject.timeline.push({type:'start', shortHref: purify(location.href), pageHref:location.href, timeAt:Date.now() , histCount: history.length});
        //alert(stringify(tabObject))

        let resCheckSpam = checkSpam(tabObject);
        if(resCheckSpam){
            let {filteredTimeline, jsHistCount}=resCheckSpam;
            tabObject.hitAt=-1;
            GM_saveTab(tabObject);
            alert(`spam website "${filteredTimeline[0].shortHref}" detected \n go back ${purify(filteredTimeline[0].pageHref)}`);
            //location.href=filteredTimeline[0].pageHref;
            history.go(-(jsHistCount[jsHistCount.length-1] - jsHistCount[0]));
        }else{
            GM_saveTab(tabObject);
        }

        function onReady(){

            let emc = elementCount(document);
            if(emc<40){ // including html, body, script, div, ... //7 16 33
                emc-=document.querySelectorAll('script, style, meta, title, head, link, noscript').length; //remove count for non-visual elements //6 12
            }
            tabObject.timeline.push({type:'complete', shortHref: purify(location.href), pageHref:location.href, timeAt:Date.now(), elementCount: emc , histCount: history.length });
            //alert(stringify(tabObject))
            GM_saveTab(tabObject);

            let hElems = null
            if(isGoogleSearchPage){
                hElems = [...document.querySelectorAll('a[href^="http"]')].filter(elm=>!/^https?\:\/\/\w+\.(google|googleusercontent)\.com(\.\w{0,2}){0,2}\//.test(elm.href))
                for(const hElem of hElems){
                    hElem.addEventListener('click',function(){
                        tabObject.hitAt = Date.now();
                        tabObject.timeline.push({type:'click', shortHref:purify(hElem.href), pageHref:location.href, timeAt:tabObject.hitAt , histCount: history.length});
                        //alert(stringify(tabObject))
                        GM_saveTab(tabObject);
                    })
                }
            }

        }

        ;(function uiMain(){
            if(document.documentElement == null) return window.requestAnimationFrame(uiMain)
            if (document.readyState !== 'loading') {
                onReady();
            } else {
                document.addEventListener('DOMContentLoaded', onReady);
            }
        })();

    })
})();
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