// ==UserScript==
// @name     HentaiNexus Download File Name Fix
// @include     *://hentainexus.com/view*
// @version     1.5
// @grant    GM_setClipboard
// ==/UserScript==

(function() {
    var div = document.createElement("div");
    div.className = "button is-primary";
    div.style = "margin-right: 1em;";
    div.onclick = getTitle;

    var text = document.createElement("span");
    text.id = "btnText";
    text.className = "button-class"
    text.innerHTML = "Get File Name";

    div.appendChild(text);

    var table = document.getElementsByClassName("level-left");
    table[0].appendChild(div);

})();

function getTitle() {
    var title = document.getElementsByClassName("title");

    var elements = document.getElementsByTagName("a");
    elements = Array.from(elements); //convert to array

    var artist = elements.find(function(item) { return item.href.indexOf("artist") != -1; });
    var magazine = elements.find(function(item) { return item.href.indexOf("magazine") != -1; });
    var publisher = elements.find(function(item) { return item.href.indexOf("publisher") != -1; });

    var artistName = artist.innerHTML;
    var magazineName = magazine.innerHTML;
    var publisherName = publisher.innerHTML;

    var fileName = "["+ artistName +"] "+ title[0].innerHTML +" ("+ magazineName +") ["+ publisherName +"].zip";
    fileName = fileName.replace("&", "&");

    GM_setClipboard(fileName);

    var text = document.getElementById("btnText");
    text.innerHTML = "        Done!        ";
    fadeOutText(text);

    //debug
    //alert("File Name:\r\n" + fileName + "\r\n\r\nCopied on Clipboard.");
}

function fadeOutText(element) {
    var op = 1; // initial opacity
    var timer = setInterval(function () {

        if (op > 0.06) {
            op -= op * 0.1;
        }
        else {
            op = 1;
            element.innerHTML = "Get File Name";
            clearInterval(timer);
        }
        element.style.opacity = op;
    }, 50);
}