// ==UserScript==
// @name        New Torrent flagging only
// @namespace   nowhere.man
// @include     http://torrents.empornium.me/torrents.php*
// @version     1
// @grant       none
// ==/UserScript==

var new_img =
    "data:image/png;base64,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";

function init() {

    if (window.location.href.indexOf("?id=") === -1) {

        if (!localStorage.lastId) {
            localStorage.lastId = 1;
        }

        if (!localStorage.maxId) {
            localStorage.maxId = 1;
        }

        identifyNewTorrents(localStorage.lastId);
        addClearNewButton();

        document.styleSheets[0].insertRule("div.tags{padding-left: 0px}", 0);
        document.styleSheets[0].insertRule("#torrent_table tr {vertical-align: middle;}", 0);
        document.styleSheets[0].insertRule(
            ".icon_new{background: url(" + new_img + ") no-repeat scroll center}",
            0);
    }
        else {  }
}
function identifyNewTorrents(lastId) {
    var rows = document.evaluate(
        "//tr[@class='torrent rowa' or @class='torrent rowb' or @class='torrent redbar']",
        document, null, XPathResult.UNORDERED_NODE_SNAPSHOT_TYPE, null
    );
    var maxId = localStorage.maxId;
    var id_re = new RegExp('id=(\\d+)');

    for (var i = 0; i < rows.snapshotLength; i++) {
        var row = rows.snapshotItem(i);
        var torrentTitle = row.querySelector("td:nth-child(2) a");
        var link = torrentTitle.getAttribute("href");
        var regex = link.match(id_re);
        if (regex) {
            var id = parseInt(regex[1], 10);
            if (id > maxId) {
                maxId = id;
            }
            var overlay = window["overlay" + id];
            addNewTorrentSign(row, id, lastId);
            moveTableCells(row);
        }
    }

    if (maxId > localStorage.maxId) {
        localStorage.maxId = maxId;
    }
}

function addClearNewButton() {
    var a = document.createElement('a');
    a.setAttribute("href", "javascript:void(0)");
    a.setAttribute("id", "clearNew");
    a.setAttribute("style", "display: block; text-align: center; font-weight: normal;");
    var img = document.createElement("img");
    img.setAttribute("style", "vertical-align: middle;");
    img.src = new_img;
    var span = document.createElement("span");
    span.innerHTML = " Clear New";

    a.appendChild(span);
    a.addEventListener('click', function() {
        localStorage.lastId = localStorage.maxId;
        markAsOld(localStorage.maxId);
        return false;
    }, true);

    var cont = document.querySelector("table.torrent_table td.cats_col");
    cont.appendChild(a);
}

function moveTableCells(row) {
}

function addNewTorrentSign(row, id, lastId) {
    if (id > lastId) {
        var img_element = document.createElement('span');
        img_element.setAttribute("class", "icon icon_new");
        img_element.setAttribute("tid", id);
        img_element.setAttribute("title", "This torrent is new, click to mark as old");
        img_element.setAttribute("style", "cursor: pointer;");
        img_element.addEventListener("click", function handler(evt) {
            markAsOld(this.getAttribute('tid'));
        }, true);
        row.getElementsByTagName("span")[0].appendChild(img_element);
    }
}

function markAsOld(id) {
    localStorage.lastId = parseInt(id, 10);
    var imgs = document.evaluate(
        "//span[@class='icon icon_new' and @tid <= " + id + "]",
        document, null, XPathResult.UNORDERED_NODE_SNAPSHOT_TYPE, null
    );
    for (var i = 0; i < imgs.snapshotLength; i++) {
        imgs.snapshotItem(i).setAttribute("style", "display:none");
    }
}

setTimeout(function() {
    init();
}, 250);