Sankaku2Aria - Generates parametrized links, compatible with aria2 (with `-P` parameter)

s2ag.user.js

// ==UserScript==
// @name         Sankaku2Aria
// @namespace    http://tampermonkey.net/
// @version      0.1
// @description  Generates parametrized links, compatible with aria2 (with `-P` parameter)
// @author       Nuark
// @match        *://sankakucomplex.com/*/*/*/*/
// @match        *://www.sankakucomplex.com/*/*/*/*/
// @grant        none
// ==/UserScript==

(function() {
    'use strict';

    document.querySelector(".entry-header").innerHTML += '<div class="entry-meta"><div id="link_holder" class="meta-item">:3</div></div>';
    let links = Array.from(new Set(Array.from(document.querySelectorAll(".entry-content [data-lazy-type=\"image\"]")).map(link=>link.parentNode.href)));
    let gifs = links.filter(link=>link.endsWith(".gif"));
    let rasters = links.filter(link=>link.endsWith(".jpg")||link.endsWith(".jpeg")||link.endsWith(".png"));
    console.log(gifs);
    console.log(rasters);

    let out = "";
    if (rasters.length > 0) {
        let link = rasters[0];
        link = (link.startsWith("https:")? "" : "https:") + link;
        console.log(link);
        let parts = link.split(/(.*-)(\d+)(\..*)/).slice(1, -1);
        out += `${parts[0]}[1-${rasters.length}]${parts[2]}`;
        if (gifs.length > 0) {
            out += "<br>";
        }
    }
    if (gifs.length > 0) {
        let link = gifs[0];
        link = (link.startsWith("https:")? "" : "https:") + link;
        console.log(link);
        let parts = link.split(/(.*-)(\d+)(\..*)/).slice(1, -1);
        out += `${parts[0]}[1-${gifs.length}]${parts[2]}`;
    }
    if (rasters.length === 0 && gifs.length === 0) {
        out = "can't obtain links :(";
    }
    document.querySelector("#link_holder").innerHTML = out;
})();