// ==UserScript==
// @name         YouTubeとニコニコ動画にRSSリンクを追加
// @description  YouTube：ユーザー、マイリスト、チャンネル　ニコニコ動画：ユーザー、マイリスト、タグ
// @version      0.1
// @run-at       document-idle
// @match  *://www.youtube.com/playlist?list=*
// @match  *://www.youtube.com/channel/*
// @match  *://www.youtube.com/user/*
// @match  *://www.nicovideo.jp/user/*
// @match  *://www.nicovideo.jp/mylist/*
// @match  *://www.nicovideo.jp/tag/*
// @match  *://www.nicovideo.jp/related_tag/*
// @match  *://www.nicovideo.jp/search/*
// @match  *://www.nicovideo.jp/watch/*
// @match  *://www.nicovideo.jp/mylist_search/*
// @grant none
// @namespace https://greasyfork.org/users/181558
// @downloadURL none
// ==/UserScript==

(function() {
  var rssICON = '<img src="data:image/png;base64,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">';
  setTimeout(addLinks, 200);

  //ページ継ぎ足しアドオンに対応
  if (location.href.match(/related_tag|mylist_search/)) document.addEventListener("AutoPagerize_DOMNodeInserted", addLinks);

  //AutoPagerize系アドオンでuserやタグページを継ぎ足した時に２ページ目以降のリンクがおかしくなるのを修正
  //user
  if (location.href.match(/www.nicovideo.jp\/user/)) document.addEventListener("AutoPagerize_DOMNodeInserted", function() {
    for (let ele of elegeta("//div[@class='section']/h5/a[contains(@href,'http://www.nicovideo.jp/user/')]"))
      ele.href = "http://www.nicovideo.jp/watch/" + ele.href.replace(/https?:\/\/www.nicovideo.jp\/user\/\d*\/watch\//, "");
  });
  //related_tag
  if (location.href.match(/www.nicovideo.jp\/related_tag/)) document.addEventListener("AutoPagerize_DOMNodeInserted", function() {
    for (let ele of elegeta("//a[contains(@href,'http://www.nicovideo.jp/related_tag/tag/')]"))
      ele.href = "http://www.nicovideo.jp/tag/" + ele.href.replace(/https?:\/\/www.nicovideo.jp\/related_tag\/tag\//, "");
  });

  return;

  //実際にリンクを付ける
  function addLinks() {

    //「新しいタブで開く」指定を外す
    for (let ele of elegeta('//a[@target="_blank"]')) ele.removeAttribute("target");

    //前回つけたリンクがあれば除去
    for (let ele of elegeta("//span[@class='multirss']|//a[@class='multirss']")) ele.parentNode.removeChild(ele);

    addRSSlink("://www.youtube.com/playlist?list=", '//a[@class="yt-simple-endpoint style-scope yt-formatted-string"]', '<a href="https://www.youtube.com/feeds/videos.xml?playlist_id=***">*RSS Feed*</a>', "list=");
    addRSSlink("://www.youtube.com/channel/", '//span[@id="channel-title"]', '<a href="https://www.youtube.com/feeds/videos.xml?channel_id=***">*RSS Feed*</a>', "channel/");
    addRSSlink("://www.youtube.com/user/", '//span[@id="channel-title"]', '<a href="https://www.youtube.com/feeds/videos.xml?user=***">*RSS Feed*</a>', "user/");

    var nicodeleteOpt = /[\?&]f_range=.|[\?&]l_range=.|[\?&]opt_md=.*|[\?&]start=.*|[\?&]end=.*|[\?&]ref=[^&]*|[\?&]sort=.|[\?&]order=.|[\?&]page=\d*|[\?&]track=[^&]*|#+.*/g;
    addRSSlink("www.nicovideo.jp/user/", '//div[@class="profile"]', '<a href="http://www.nicovideo.jp/user/***/video?rss=2.0">*RSS Feed*</a>', "/user/", "", nicodeleteOpt);
    addRSSlink("www.nicovideo.jp/mylist/", '//div[@id="SYS_box_mylist_header"]/div/h1', '<a href="http://www.nicovideo.jp/mylist/***">*RSS Feed*</a>', "", "?rss=2.0", nicodeleteOpt);
    addRSSlink("www.nicovideo.jp/tag/", '//header[@class="contentHeader"]/h1/span', '<a href="http://www.nicovideo.jp/tag/***">*RSS Feed*</a>', "", "?sort=f&rss=2.0", nicodeleteOpt);

    addRSSlink2("www.nicovideo.jp/related_tag/", '//table[@class="font12"]/tbody/tr/td/a', '<a href="http://www.nicovideo.jp/tag/***?sort=f&rss=2.0">*RSS Feed*</a>', "", "", nicodeleteOpt);
    addRSSlink2("www.nicovideo.jp/search", "//ul[@class='tags']//a", '<a href="http://www.nicovideo.jp/tag/***?sort=f&rss=2.0">*RSS Feed*</a>', "", "", nicodeleteOpt);
    addRSSlink2("www.nicovideo.jp/tag", "//ul[@class='tags']//a", '<a href="http://www.nicovideo.jp/tag/***?sort=f&rss=2.0">*RSS Feed*</a>', "", "", nicodeleteOpt);
    addRSSlink2("www.nicovideo.jp/watch/", '//a[@class="Link TagItem-name"]', '<a href="http://www.nicovideo.jp/tag/***?sort=f&rss=2.0">*RSS Feed*</a>', "", "", nicodeleteOpt);

    if (/www.nicovideo.jp\/mylist_search\//.exec(location.href))
      for (let ele of elegeta('//div/div/div/div/div/div/p/a')) addRSS(ele, ele.href + "?rss=2.0", ele.innerText);

    return;
  }

  function eleget0(xpath) {
    var ele = document.evaluate(xpath, document, null, XPathResult.UNORDERED_NODE_SNAPSHOT_TYPE, null);
    return ele.snapshotLength > 0 ? ele.snapshotItem(0) : "";
  }

  function elegeta(xpath) {
    var ele = document.evaluate(xpath, document, null, XPathResult.UNORDERED_NODE_SNAPSHOT_TYPE, null);
    var array = [];
    for (var i = 0; i < ele.snapshotLength; i++) array[i] = ele.snapshotItem(i);
    return array;
  }

  function addRSSlink(inurl, xpath, newurl, part, after, urlGarbage = /$^/) {
    if (location.href.indexOf(inurl) == -1) return
    var ele = eleget0(xpath);
    var text = newurl + location.href.split(part)[1];
    var url = location.href.replace(urlGarbage, "");
    var link = document.createElement("span");
    var url2 = after ? ('<a href="' + url + after + '">*RSS Feed*</a>') : newurl.replace("***", location.href.split(part)[1].match(/[^\?&\/]*/g)[0]);
    var bgcol = "background-color:#c9e9ff;";
    link.setAttribute("title", ele.innerText + "のRSSを購読");
    link.setAttribute("class", "multirss");
    url2 = url2.replace("*RSS Feed*", rssICON)
    link.innerHTML = url2;
    ele.parentNode.appendChild(link);
    return;
  }

  function addRSSlink2(inurl, xpath, newurl, part, after, urlGarbage = /$^/) {
    if (location.href.indexOf(inurl) == -1) return
    for (let ele of elegeta(xpath)) {
      var url = location.href.replace(urlGarbage, "");
      var link = document.createElement("span");
      var url2 = newurl.replace("***", encodeURIComponent(ele.innerText));
      var bgcol = "background-color:#c9e9ff;";
      url2 = url2.replace("*RSS Feed*", rssICON)
      link.setAttribute("title", ele.innerText + "のRSSを購読");
      link.setAttribute("class", "multirss");
      link.innerHTML = url2;
      ele.parentNode.insertBefore(link, ele);
    }
    return;
  }

  function addRSS(place, url, title) {
    var link = place.parentNode.insertBefore(document.createElement("a"), place);
    link.href = url;
    link.setAttribute("title", title + "のRSSを購読");
    link.setAttribute("class", "multirss");
    link.innerHTML = rssICON;
  }
})();