// ==UserScript==
// @name         【伟哥自用】tly.comのss链接转json
// @namespace    http://tampermonkey.net/
// @version      0.1
// @description  parse Shadowsocks subscription links from tly.com and generate json config outputs
// @author       朱焱伟
// @match        https://tly70.com/modules/node_qr.php*
// @match        https://www.tly12.com/modules/node_qr.php*
// @include      https://tly*.com/modules/node_qr.php*
// @include      https://www.tly*.com/modules/node_qr.php*
// @icon         https://www.google.com/s2/favicons?sz=64&domain=tly12.com
// @grant        GM_setClipboard
// ==/UserScript==
(function() {
    'use strict';
    class TlyDecoder{

        fetchsslink(){
            return document.querySelector("p#ssqr_text").textContent;
        }
        ss2arr(sslink){
            let data = "";
            if(String(sslink).startsWith('ss://')){
                data = sslink.slice(5);
            }
            /* https://stackoverflow.com/questions/246801/how-can-you-encode-a-string-to-base64-in-javascript/247261#247261
             * atob : decode BASE64 string
             */
            let encodedString = atob(data);
            let arr = encodedString.split(':');
            return arr;
        }
        sslinkDecode(sslink) {/** resolve ss://XXXX */
            let arr = this.ss2arr(sslink);
            let method = arr[0];
            let ip = arr[1].split('@')[1];
            let password = arr[1].split('@')[0];
            let port = Number(arr[2]);
            /** hardcoded default sslink config:
             * local_address "127.0.0.1"
             * local_port 1080
             * timeout: 300
             * (you can modify them if you like)
             */
            let ssconf_obj = {
                server:ip,
                server_port:port,
                password:password,
                local_address: "127.0.0.1",
                local_port: 1080,
                timeout: 300,
                method:method
            }
            let ssConfig_str = JSON.stringify(ssconf_obj,null,4);
            return ssConfig_str;
        }
        test(){
            /** sslink example: ss://YWVzLTI1Ni1nY206MTIzMTIzQGZ1Y2tsaWhlbmdkYW8uY29tOjY2NjY=
             * btoa("aes-256-gcm:123123@fucklihengdao.com:6666")
             * 'YWVzLTI1Ni1nY206MTIzMTIzQGZ1Y2tsaWhlbmdkYW8uY29tOjY2NjY='
             */
            console.log(this.sslinkDecode("ss://YWVzLTI1Ni1nY206MTIzMTIzQGZ1Y2tsaWhlbmdkYW8uY29tOjY2NjY="));
        }
    }

    function getCopyContent(){
        let tlydecoder = new TlyDecoder();
        /* tlydecoder.test(); */
        let sslink = tlydecoder.fetchsslink();
        let to_copy = tlydecoder.sslinkDecode(sslink);
        return to_copy
    }

    function AddJsonCodeArea(json_text){
        let jsonCodeArea = document.createElement("p");
        /**
         * https://stackoverflow.com/questions/883977/display-json-as-html
         * If you are deliberately displaying it for the end user, wrap the JSON text in <PRE> and <CODE> tags
         */
        jsonCodeArea.innerHTML= "<pre><code>"+json_text+"</code></pre>";
        document.body.append(jsonCodeArea);
    }

    function AddCopyButton(json_text){
        let btn = document.createElement("button");
        btn.innerHTML="一键复制";
        GM_setClipboard(json_text)
        document.body.append(btn);
    }

    let to_copy = getCopyContent();
    console.log(to_copy);
    AddJsonCodeArea(to_copy);
    AddCopyButton(to_copy);
})();
/**
 * ==================================================================================================
 * A UserScript to parse Shadowsocks subscription links from tly.com and generate json config outputs
 * ==================================================================================================
 *  The local_port and timeout in the shadowsocks settings is hardcoded,
 *  the default is 1080 for local port and 300 for timeout.
 *
 *  - sudo systemctl start shadowsocks-libev-local@config
 *  - sudo systemctl stop shadowsocks-libev-local@config
 *  - sudo gedit /etc/shadowsocks-libev/config.json
 *
 *  I am currently using privoxy and shadowsocks-libev, but I'm tired of
 *  converting ss://XXX links on tly.com to formatted JSON in terminal,
 *  that's the reason why I wrote this userscript.
 *
 *  References:
 * - https://github.com/OliverLew/ssr-decode
 * - https://github.com/HTML50/ssr2json
 * - https://stackoverflow.com/questions/883977/display-json-as-html
 *
 */