Quick and dirty function to extract tracklistings from a BFF.FM show playlist and convert it into a Mixcloud compatible blob of text. Recognises gaps in songs and creates chapter breaks automatically.

gistfile1.js

(function mixcloudify (startHour) {
  var TALK_BREAK_MINIMUM = 4, // minimum length to insert a talk break
      showDate;

  function showTime () {
    var start = startHour.split(":").map(function (item) {
      return padNumber(item);
    });
    
    return Date.parse([
      showDate,
      "T",
      start[0] || "00",
      ":",
      start[1] || "00",
      ":",
      start[2] || "00",
      "-07:00"].join("")
    ) / 1000;
  }

  function padNumber (i) {
    i = "" + i;
    if (i.length == 1) return "0" + i;
    return i;
  }

  function formatOffset (startTime) {
    var durationSecs = startTime - showTime();
    return [durationSecs, 0, 0].map(function (val, i, arr) {
      var nextVal,
          next = i + 1;

      if (next == arr.length) return val;

      nextVal = Math.floor(val / 60);
      arr[next] = nextVal;
      return val - (nextVal * 60);
    }).map(padNumber).reverse().join(":");
  }

  function timestampToSecs (dateString) {
    if (!showDate) {
      showDate = dateString.split(" ")[0];
    }
    return Date.parse(dateString.replace(" ", "T") + "-07:00") / 1000;
  }

  // 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 track info
    prompt("Paste into Mixcloud", Array.prototype.map.call(expandedTracks, function (item) { 
      return { 
        start: timestampToSecs(item.querySelector('input[name="data[Track][played]"]').value),
        end: timestampToSecs(item.querySelector('input[name="data[Track][ended]"]').value),
        artist: item.querySelector('input[name="data[Track][artist]"]').value,
        title: item.querySelector('input[name="data[Track][title]"]').value
      };
    }).sort(function (a, b) {
      if (a.start > b.start) return 1;
      if (b.start > a.start) return -1;
      return 0;
    }).reduce(function (finalTracklisting, currentTrack, idx, allTracks) {
      var previousTrackEnd = idx > 0 && allTracks[idx-1].end || showTime();
      
      // Auto detect talk breaks
      if ((currentTrack.start - previousTrackEnd) > TALK_BREAK_MINIMUM) {
        finalTracklisting.push("Talk Break\t" + formatOffset(previousTrackEnd));
      }
      finalTracklisting.push([
        currentTrack.artist,
        currentTrack.title,
        formatOffset(currentTrack.start)].join(" - ")
      );

      return finalTracklisting;
    }, []).join("\n"));
  }, 300);
})(prompt("What time did you start broadcasting? e.g. `20:01:30`", "20:00:00"));