// ==UserScript==
// @name           rym Total Track Times
// @description    Calculates total track time for releases on rateyourmusic.com
// @include        http://rateyourmusic.com/release/*
// ==/UserScript==

// updated January 23, 2009 to support track listings with play links.

var main;

main = document.getElementById('tracklisting');

if (main) {

  var mainTbody = main.getElementsByTagName("tbody") [0];
  var rows = mainTbody.getElementsByTagName("tr");
  var trackmins = 0;
  var tracksecs = 0;
  var trackhours = 0;

  for(var i=0, row=null;row=rows[i]; i++){
    var cells=row.getElementsByTagName("td");
    var cell=row.getElementsByTagName("td")[cells.length - 1];
    var tracktime = cell.textContent;

    var curTrackmins = parseInt(tracktime.split(':')[0], 10);
    var curTracksecs = parseInt(tracktime.split(':')[1], 10);

    trackmins += isNaN(curTrackmins) ? 0 : curTrackmins;
    tracksecs += isNaN(curTracksecs) ? 0 : curTracksecs;
  }

  trackmins += Math.floor((tracksecs / 60));
  tracksecs = (tracksecs % 60);
  trackhours = Math.floor((trackmins / 60));
  trackmins -= (trackhours * 60);

  var row = document.createElement("tr");
  var color = "rgb(255,255,204)";

  cell = document.createElement("td");
  cell.style.background = color;
  row.appendChild(cell);

  if(cells.length >= 4) {
    cell = document.createElement("td");
    cell.style.background = color;
    row.appendChild(cell);
  }

  cell = document.createElement("td");
  cell.style.background = color;
  cellText = document.createTextNode("Total Time:");
  cell.appendChild(cellText);
  row.appendChild(cell);

  if(cells.length == 5) {
    cell = document.createElement("td");
    cell.style.background = color;
    row.appendChild(cell);
  }

  cell = document.createElement("td");
  cell.style.background = color;
  if((isNaN(trackmins)) || (trackmins == 0)) {
    cellText = document.createTextNode("n/a");
  } else {
    tracksecs += '';
    trackmins += '';
    if(tracksecs.length == 1) { tracksecs = "0" + tracksecs; }
    if(trackmins.length == 1) { trackmins = "0" + trackmins; }
    if(trackhours == 0) {cellText = document.createTextNode(trackmins + ":" + tracksecs); }
    else {cellText = document.createTextNode(trackhours + ":" + trackmins + ":" + tracksecs); }
  }
  cell.appendChild(cellText);
  row.appendChild(cell);

  main.appendChild(row);
}