// ==UserScript==
// @name         推特翻译机
// @namespace    http://tampermonkey.net/
// @version      0.6
// @description  该脚本用于翻译推特为中文，不会经过中间服务器。
// @author       HolynnChen
// @match        https://twitter.com/*
// @grant        GM_xmlhttpRequest
// @grant        GM_setValue
// @grant        GM_getValue
// @require      https://cdn.bootcss.com/crypto-js/3.1.9-1/core.min.js
// @require      https://cdn.bootcss.com/crypto-js/3.1.9-1/md5.min.js
// @downloadURL none
// ==/UserScript==
const transdict={'谷歌翻译':translate_gg,'沪江翻译':translate_hj,'爱词霸翻译':translate_icib,'必应翻译':translate_biying,'有道翻译':translate_youdao,'腾讯翻译':translate_tencent,'关闭翻译':e=>e.className+=" js_translate"};
const startup={'谷歌翻译':translate_gg_startup,'有道翻译':translate_youdao_startup,'腾讯翻译':translate_tencent_startup};
const enable_pass_lang=GM_getValue('enable_pass_lang',false);
(function() {
    'use strict';
    let choice=GM_getValue('translate_choice','谷歌翻译');
    let main=_=>{
        let temp=makeArray(document.querySelectorAll('.tweet-text,div[lang]')).filter(x=>x.className.indexOf('js_translate')==-1);
        for(let i=0;i<temp.length;i++){
            temp[i].className+=" js_translate";
            if(baseText(temp[i]).length==0)continue;
            if(sessionStorage.getItem(choice+'-'+baseText(temp[i]))){
                ce_text(temp[i],choice,sessionStorage.getItem(choice+'-'+baseText(temp[i])));
            }else{
                pass_lang(temp[i]).then(e=>transdict[choice](e));
            }
        }
    };
    if(!startup[choice]){
        setInterval(main,50)
    }else{
        (new Promise(startup[choice])).then(_=>setInterval(main,50))
    }
    let select=document.createElement("select");
    select.id='js_translate';
    select.style='z-index:99999;height:35px;width:100px;background-color:#fff;position:fixed;border-radius:17.5px;right:9px;top:9px;text-align-last:center;color:#000000';
    select.onchange=_=>{
        if(select.value=='more'){
            select.value=choice;
            dialog.showModal()
            return;
        }
        choice=select.value;
        GM_setValue('translate_choice',choice);
        history.go(0)
    };
    for(let i in transdict)select.innerHTML+='<option value="'+i+'">'+i+'</option>';
    select.innerHTML+='<option value="more">更多设置</option>'
    let dialog=document.createElement("dialog");
    dialog.style='padding:0;border-radius:10px';
    //dialog.onclick=dialog.close;
    dialog.addEventListener('click',event=>{if(event.target===dialog)dialog.close()})
    dialog.innerHTML='<div style="min-height:10vh;min-width:10vw;display:flex;flex-direction:column;align-items:center;padding:10px;border-radius:4px"><h4 style="margin:5px 0">设置面板</h4><p><input type="checkbox" name="enable_pass_lang">不翻译中文推特</p></div>';
    let inputs=dialog.querySelectorAll('input');
    let title=dialog.querySelector('h4');
    for(let i of inputs){
        if(GM_getValue(i.name,false))i.checked=true;
        i.onclick=_=>{
            GM_setValue(i.name,i.checked);
            switch(i.name)
            {
                case 'enable_pass_lang':
                    if(i.checked)sessionStorage.clear();
                    title.innerText="控制面板（请刷新以应用）"
                    break;
                default:
                    return
            }
        }
    }
    document.body.appendChild(dialog);
    document.body.appendChild(select);
    document.querySelector('#js_translate option[value='+choice+']').selected=true;
})();
function makeArray(arr){
    if(arr.item){
        var len = arr.length;
        var array = [];
        while(len--){
            array[len] = arr[len];
        }
        return array;
    }
    return Array.prototype.slice.call(arr);
}
function baseText(element){
    return Array.prototype.map.call(element.querySelectorAll('span'),e=>e.innerText).join('')
}
function tk(a){
    var b=sessionStorage.getItem('google_tkk');
    var d = b.split(".");
    b = Number(d[0]) || 0;
    for (var e = [], f = 0, g = 0; g < a.length; g++) {
        var k = a.charCodeAt(g);
        128 > k ? e[f++] = k : (2048 > k ? e[f++] = k >> 6 | 192 : (55296 == (k & 64512) && g + 1 < a.length && 56320 == (a.charCodeAt(g + 1) & 64512) ? (k = 65536 + ((k & 1023) << 10) + (a.charCodeAt(++g) & 1023),
        e[f++] = k >> 18 | 240,
        e[f++] = k >> 12 & 63 | 128) : e[f++] = k >> 12 | 224,
        e[f++] = k >> 6 & 63 | 128),
        e[f++] = k & 63 | 128)
    }
    a = b;
    for (f = 0; f < e.length; f++)a = Fo(a+e[f], "+-a^+6");
    a = Fo(a, "+-3^+b+-f");
    a ^= Number(d[1]) || 0;
    0 > a && (a = (a & 2147483647) + 2147483648);
    a %= 1E6;
    return a.toString() + "." + (a ^ b)
}
function Fo(a, b) {
    for (var c = 0; c < b.length - 2; c += 3) {
        var d = b.charAt(c + 2);
        d = "a" <= d ? d.charCodeAt(0) - 87 : Number(d);
        d = "+" == b.charAt(c + 1) ? a >>> d : a << d;
        a = "+" == b.charAt(c) ? a + d & 4294967295 : a ^ d
    }
    return a
}
function ce_text(e,name,text){//change element text
    if(text.length==0)text='翻译异常'
    e.innerHTML+='\n\n-----------'+name+'-----------\n\n'+text
}
function translate_gg(e,error){
    let myname='谷歌翻译'
    GM_xmlhttpRequest({
        method:"GET",
        url:'https://translate.google.com/translate_a/single?client=webapp&sl=auto&tl=zh-CN&hl=zh-CN&dt=at&dt=bd&dt=ex&dt=ld&dt=md&dt=qca&dt=rw&dt=rm&dt=ss&dt=t&source=btn&ssel=0&tsel=0&kc=0&tk='+tk(baseText(e))+'&q='+encodeURIComponent(baseText(e)),
        onload:(data)=>{
            let s=''
            try{
                data=JSON.parse(data.responseText);
                s=data[0].map(x=>x[0]||'').join('')
                sessionStorage.setItem(myname+'-'+baseText(e),s)
            }catch(err){
                console.log(data.responseText)
                if(error){ce_text(e,mynanm,'翻译出错');return}
                setTimeout(_=>translate_gg(e,true),3000)
                return
            }
            ce_text(e,myname,s)
    }})
}
function translate_gg_startup(reslove,reject){
    if(!sessionStorage.getItem('google_tkk')){
        GM_xmlhttpRequest({
            method:'GET',
            url:'https://translate.google.com',
            onload:function(res){
                sessionStorage.setItem('google_tkk',res.responseText.match(/tkk:'.*?(?=')/g)[0].slice(5))
                reslove()
            }
        });
    }else{
        reslove()
    }
}

function translate_hj(e,error){
    let myname='沪江翻译'
    GM_xmlhttpRequest({
        method:"POST",
        url:'https://dict.hjenglish.com/v10/dict/translation/jp/cn',
        data:'content='+encodeURIComponent(baseText(e).replace('twitter','推特')),
        headers: {
            "Content-Type": "application/x-www-form-urlencoded",
            'Cookie':'HJ_UID=0;'
        },
        onload:(data)=>{
            let s=''
            try{
                data=JSON.parse(data.responseText);
                s=data.data.content;
                sessionStorage.setItem(myname+'-'+baseText(e),s)
            }catch(err){
                console.log(data.responseText)
                console.log(baseText(e))
                if(error){ce_text(e,myname,'翻译出错');return}
                setTimeout(_=>translate_hj(e,true),3000)
                return
            }
            ce_text(e,myname,s)
    }})
}
function translate_icib(e,error){
    let myname='爱词霸翻译'
    e.className+=" js_translate";
    GM_xmlhttpRequest({
        method:"POST",
        url:'http://fy.iciba.com/ajax.php?a=fy',
        data:'f=auto&t=auto&w='+encodeURIComponent(baseText(e)),
        headers: {
            "Content-Type": "application/x-www-form-urlencoded",
        },
        onload:(data)=>{
            let s=''
            try{
                data=JSON.parse(data.responseText);
                s=data.content.out;
                sessionStorage.setItem(myname+'-'+baseText(e),s)
            }catch(err){
                console.log(data.responseText)
                console.log(baseText(e))
                if(error){ce_text(e,myname,'翻译出错');return}
                setTimeout(_=>translate_icib(e,true),3000)
                return
            }
            ce_text(e,myname,s)
    }})
}
function translate_biying(e,error){
    let myname='必应翻译'
    GM_xmlhttpRequest({
        method:"POST",
        url:'https://cn.bing.com/ttranslate',
        data:'from=ja&to=zh-CHS&text='+encodeURIComponent(baseText(e)),
        headers: {
            "Content-Type": "application/x-www-form-urlencoded",
        },
        onload:(data)=>{
            let s=''
            try{
                data=JSON.parse(data.responseText);
                s=data.translationResponse;
                sessionStorage.setItem(myname+'-'+baseText(e),s)
            }catch(err){
                console.log(data.responseText)
                console.log(baseText(e))
                if(error){ce_text(e,myname,'翻译出错');return}
                setTimeout(_=>translate_biying(e,true),3000)
                return
            }
            ce_text(e,myname,s)
    }})
}
function youdao_data(text){
    let ts=""+(new Date).getTime(),salt=ts+parseInt(10 * Math.random(), 10);
    let result=`i=${encodeURIComponent(text)}&from=AUTO&to=AUTO&smartresult=dict&client=fanyideskweb&salt=${salt}&sign=${CryptoJS.MD5("fanyideskweb"+text+salt+sessionStorage.getItem('youdao_key'))}&ts=${ts}&doctype=json&version=2.1&keyfrom=fanyi.web&action=FY_BY_REALTlME&typoResult=false`
    return result
}
function translate_youdao(e,error){
    let myname='有道翻译'
    GM_xmlhttpRequest({
        method:"POST",
        url:'http://fanyi.youdao.com/translate_o?smartresult=dict&smartresult=rule',
        data:youdao_data(baseText(e)),
        headers: {
            "Content-Type": "application/x-www-form-urlencoded; charset=UTF-8",
            "Referer": "http://fanyi.youdao.com/",
            "User-Agent": "test",
        },
        onload:(data)=>{
            let s=''
            try{
                data=JSON.parse(data.responseText);
                s=data.translateResult.map(e=>e.map(t=>t.tgt).join('')).join('\n');
                sessionStorage.setItem(myname+'-'+baseText(e),s)
            }catch(err){
                console.log(data,data.responseText)
                if(error){ce_text(e,myname,'翻译出错');return}
                setTimeout(_=>translate_youdao(e,true),3000)
                return
            }
            ce_text(e,myname,s)
    }})
}
function translate_youdao_startup(reslove,reject){
    if(!sessionStorage.getItem('youdao_key')){
        GM_xmlhttpRequest({
            method:'GET',
            url:'http://fanyi.youdao.com',
            onload:function(res){
                GM_xmlhttpRequest({
                    method:'GET',
                    url:res.responseText.match(/http.*?fanyi.min.js/g)[0],
                    onload:function(res){
                        sessionStorage.setItem('youdao_key',res.responseText.match(/fanyideskweb.{6}".*?(?=")/g)[0].slice(19));
                        reslove()
                    }
                })
            }
        });
    }else{
        reslove()
    }
}
function translate_tencent(e,error){
    let myname='腾讯翻译'
    let qtk=sessionStorage.getItem('tencent_qtk'),qtv=sessionStorage.getItem('tencent_qtv');
    if(qtk && qtv){
        GM_xmlhttpRequest({
            method:'POST',
            url:'https://fanyi.qq.com/api/translate',
            data:`source=auto&target=zh&sourceText=${encodeURIComponent(baseText(e))}&qtv=${encodeURIComponent(qtv)}&qtk=${encodeURIComponent(qtk)}&sessionUuid=translate_uuid${(new Date).getTime()}`,
            headers: {
                "Origin":"https://fanyi.qq.com",
                "Content-Type": "application/x-www-form-urlencoded",
                "Referer": "https://fanyi.qq.com/"
            },
            onload:(data)=>{
                let s=''
                try{
                    data=JSON.parse(data.responseText);
                    s=data.translate.records.map(e=>e.targetText).join('');
                    sessionStorage.setItem(myname+'-'+baseText(e),s)
                }catch(err){
                    console.log(baseText(e));
                    if(error){ce_text(e,myname,'翻译出错');return}
                    setTimeout(_=>translate_tencent(e,true),3000)
                    return
                }
                ce_text(e,myname,s)},
            onerror:(err)=>{
                if(error){ce_text(e,myname,'翻译出错');return}
                setTimeout(_=>translate_tencent(e,true),3000)
            }
        });
    }else{
        console.log('无法获取qtk与qtv')
    }
}
function translate_tencent_startup(reslove,reject){
    if(!sessionStorage.getItem('tencent_qtk') || !!sessionStorage.getItem('tencent_qtv')){
        GM_xmlhttpRequest({
            method:'GET',
            url:'https://fanyi.qq.com',
            onload:function(res){
                sessionStorage.setItem('tencent_qtv',res.responseText.match(/qtv=.*?(?=")/g)[0].slice(4))
                sessionStorage.setItem('tencent_qtk',res.responseText.match(/qtk=.*?(?=")/g)[0].slice(4))
                reslove()
            }
        });
    }else{
        reslove()
    }
}
function pass_lang(e){
    return new Promise((reslove,reject)=>{
        if(!enable_pass_lang){
            reslove(e);
            return
        }
        GM_xmlhttpRequest({
            method:"POST",
            url:'https://fanyi.baidu.com/langdetect',
            data:`query=${encodeURIComponent(baseText(e).replace(/[\uD800-\uDBFF]$/, "").slice(0,50))}`,
            headers: {
                "Content-Type": "application/x-www-form-urlencoded",
            },
            onload:(data)=>{
                try{
                    data=JSON.parse(data.responseText);
                    if(data.lan!='zh')reslove(e);
                }catch(err){
                    reject(err);
                }
        }})
    })
}