content.js

chrome.runtime.sendMessage({
  todo: "showPageAction"
});
/**
 * 
 * @param {string} v_url 
 * @returns {string};
 */
function get_video_id(v_url) {
  if (v_url.indexOf("watch") == -1) {
    return "-1";
  }
  var i = v_url.indexOf("v=");
  if (i == -1) return "-1";
  var ans = "";
  for (i = i + 2; i < v_url.length; i++) {
    if (v_url[i] == '?' || v_url[i] == '/' || v_url[i] == '&') {
      return ans;
    }
    ans += v_url[i];
  }
  return ans;
}
chrome.runtime.onMessage.addListener(function (request, sender, sendResponse) {
  if (request.todo == "unblockVideo") {
    var page_href = window.location.href;
    var myNode = this.document.getElementById("player-container-outer");
    if (myNode == undefined || myNode.innerHTML == "") {
      var myNode = this.document.getElementById("player-container");
    }
    myNode = myNode.parentNode;
    var player_height = myNode.clientHeight;
    var player_width = myNode.clientWidth;
    new_code = '<iframe class="unblocked" width="' + player_width + '" height="' + player_height + '" src="https://www.youtube.com/embed/' + get_video_id(page_href) + '" frameborder="0" allow="autoplay; encrypted-media" allowfullscreen></iframe>';
    var new_player = this.document.createElement("span");
    new_player.innerHTML = new_code;
    while (myNode.firstChild) {
      myNode.removeChild(myNode.firstChild);
    }
    new_player.id = "roflancheckme";
    myNode.appendChild(new_player);
    myNode.id = "new_player";
  }
  if (request.todo == "reloadPage") {
    if (document.getElementById("roflancheckme").innerHTML != "" &&
      document.getElementById("roflancheckme").innerHTML != undefined) {
      document.location.reload(true);
    }
  }
});