Quick script to generate end-times from track lengths for tracks played on Creek.FM

gistfile1.js

(function endTimesFromTrackLength () {

  function padNumber (i) {
    i = "" + i;
    if (i.length == 1) return "0" + i;
    return i;
  }
 
  function timestampToSecs (dateString) {
    return Date.parse(dateString.replace(" ", "T") + "-07:00") / 1000;
  }

  function durationToSecs (duration) {
    var parts = duration.split(":");
    
    if (parts.length == 1) {
      parts.unshift(0);
    }
    return (parseInt(parts[0], 10) * 60) + parseInt(parts[1], 10) ;
  }

  function formatCreekTimestamp (ms) {
    var date = new Date(ms * 1000)
      , year = date.getFullYear()
      , month = padNumber(date.getMonth() + 1)
      , day = padNumber(date.getDate())
      , hour = padNumber(date.getHours())
      , minutes = padNumber(date.getMinutes())
      , seconds = padNumber(date.getSeconds());
    return [
      [year, month, day].join("-")
    , [hour, minutes, seconds].join(":")
    ].join(" ");
  }
  
  // Expand all tracks
  var collapsedTracks = document.querySelectorAll("#Tracks tbody tr td:first-child");
  Array.prototype.forEach.call(collapsedTracks, function (row) { row.click(); });
 
  var waitingForExando = window.setInterval(function () {
    var expandedTracks = document.querySelectorAll("#Tracks tbody tr.row_edit");
 
    console.log("Checking for Expanded Content", expandedTracks.length, collapsedTracks.length);
 
    // Wait for fetch to happen
    if (expandedTracks.length != collapsedTracks.length) return;
 
    // Stop polling
    window.clearInterval(waitingForExando);
 
    // Extract start + length, turn into end time.
    Array.prototype.forEach.call(expandedTracks, function (item) {      
      var start = timestampToSecs(item.querySelector('input[name="data[Track][played]"]').value)
        , duration = durationToSecs(item.querySelector('input[name="data[Track][length]"]').value);

      if (!start || !duration) return;
      
      console.log(start, duration, (start + duration), formatCreekTimestamp(start + duration));

      item.querySelector('input[name="data[Track][ended]"]').value = formatCreekTimestamp(start + duration);
    });
  }, 300);
})();