// ==UserScript==
// @name         【伟哥自用】某堂fix「复制代码」
// @namespace    http://tampermonkey.net/
// @version      0.1
// @description  fix 'copycode' button
// @author       朱焱伟
// @match        https://sehuatang.org/forum.php?mod=viewthread&tid=*
// @match        https://sehuatang.org/thread*
// @icon         https://www.google.com/s2/favicons?sz=64&domain=sehuatang.org
// @grant        unsafeWindow
// @grant        GM_registerMenuCommand
// @grant        GM_setClipboard
// ==/UserScript==

(function() {
    'use strict';
    let isBlockcodeExist = ()=>{
        return document.querySelector(".blockcode>em")?true:false;
    }

    function getBlockcodeContent (){
        if(!isBlockcodeExist())
            return "";
        let liElemArr = [...document.querySelector(".blockcode>div>ol")?.querySelectorAll("li")];
        /* https://stackoverflow.com/questions/7459704/in-javascript-what-is-the-best-way-to-convert-a-nodelist-to-an-array */
        let liContentArr =  liElemArr.map(function(li){
            return li.textContent;
        })
        return liContentArr.join("\n");
    }

    function addCopycodeMenu(){/* add GM menu */
        if(isBlockcodeExist()){
            let id = GM_registerMenuCommand ("点我「复制代码」", function(){
                let to_copy = getBlockcodeContent();       
                GM_setClipboard(to_copy);
            });
        }
    }

    function fixCopycode(){/* rewrite 「copycode」 button's onlick func*/
        if(isBlockcodeExist()){
            document.querySelector(".blockcode>em").onclick = ()=>{
                if (!window.__cfRLUnblockHandlers) return false; 
                GM_setClipboard(getBlockcodeContent());
            }
            document.querySelector(".blockcode>em").textContent="伟哥の复制代码"
        }
    } 

    fixCopycode();
    addCopycodeMenu();
    // Your code here...
})();
/** 
 * There is something wrong with 98tang's 'copycode' button, this script is to fix it.
 * The 'copycode' button does not exist in most pages, but if it does, this script will override its onlick event,
 */