// ==UserScript==
// @name         图书馆SS显示
// @namespace    book.ucdrs
// @version      0.1.0
// @author       wenmin92
// @match        *://book.ucdrs.superlib.net/search*
// @match        *://book.ucdrs.superlib.net/views/specific/*
// @description  查询全国图书馆参考咨询联盟中图书的SS
// @license MIT
// @downloadURL none
// ==/UserScript==

function doSpecific() {
    const el = document.querySelector('script[language]:not([src])');
    const imgBox = document.querySelector('.tubookimg');

    if (el) {
        const ss = el.innerText.match(/ssn=(\d{3,})/)?.[1];
        let dx = ''
        if (ss) {
            imgBox.append('SS:' + ss);
        } else if(dx = location.href.match(/dxNumber=(\d+)/)?.[1]) {
            imgBox.append('DX:' + dx);
        }
    }
}

function doSearch() {
    document.querySelectorAll('td[id="b_img"]').forEach(item => {
        const ss = item.parentElement.querySelector('input[name*="ssid"]').value;
        if (ss) {
            item.nextElementSibling.append('SS:' + ss);
        } else {
            const dxNumber = item
                .querySelector('a[href*="dxNumber"]')
                .getAttribute('href')
                .match(/dxNumber=(\d+)/)?.[1];
            dxNumber && item.nextElementSibling.append('DX:' + dxNumber);
        }
    });
}

if (location.href.includes('/views/specific/')) {
    doSpecific();
} else if (location.href.includes('/search')) {
    doSearch();
}