<?php

function renderTracks() {
  # Track list
  $track_list = array(
      "Track 1" => "cd-track-1"
    , "Track 2" => "cd-track-2"
    , "Track 3" => "cd-track-3"
    , "Track 4" => "cd-track-4"
    , "Track 5" => "cd-track-5"
    );
  # All variation of each track
  $track_format = array(
      ".mp3"  => "Mp3"
    , ".ogg"  => "Ogg/Vorbis"
    , ".flac" => "Flac"
    );
  # This is the list of all tracks which are always visible.
  $always_visible = array(1, 4);
  # Date and time when the "always_visible" tracks will be displayed.
  $start_date = mktime(18, 0, 0, 12, 1, 2006);
  # Delay between each track publication. Look at strtotime() manual for details.
  $delay = "+1 week";

  $today = mktime();
  $months = array(
       1 => "Janvier"
    ,  2 => "Février"
    ,  3 => "Mars"
    ,  4 => "Avril"
    ,  5 => "Mai"
    ,  6 => "Juin"
    ,  7 => "Juillet"
    ,  8 => "Août"
    ,  9 => "Septembre"
    , 10 => "Octobre"
    , 11 => "Novembre"
    , 12 => "Décembre"
  );

  # Compute publishing date of each track
  $track_dates = array();
  $track_number = 0;
  $track_publish_queue_order = 0;
  $previous_queue_date = $start_date;
  $new_start_date = $start_date;
  foreach($track_list as $track_title => $track_file) {
    $track_number++;
    # Is the track always published ?
    if (in_array($track_number, $always_visible)) {
      # Set publishing date to the start date
      $track_dates[$track_number] = $start_date;
    } else {
      # Compute the publishing date of the track
      $track_publish_queue_order++;
      $new_publishing_date = strtotime($delay, $previous_queue_date);
      $track_dates[$track_number] = $new_publishing_date;
      $previous_queue_date = $new_publishing_date;
    }
    # Update the start date of the period when a track is considered "new"
    if (($new_start_date <= $track_dates[$track_number]) and
        ($track_dates[$track_number] <= $today)) {
      $new_start_date = $track_dates[$track_number];
    }
  }
  # The end of the "new" track period is always today
  $new_stop_date = $today;

  # HTML rendering of each track
  $track_number     = 0;
  $html_published   = "<table>";
  $html_unpublished = $html_published;
  foreach($track_list as $track_title => $track_file) {
    $track_number++;
    $new          = False;
    $published    = False;
    $track_date   = $track_dates[$track_number];
    $track_html   = '';
    $publish_date = '';
    # Is the track published ?
    if ($track_dates[$track_number] < $today) {
      $published = True;
    }
    # Is the track new ?
    if (($new_start_date <= $track_date) and
        ($track_date <= $new_stop_date)) {
      $new = True;
    }
    if ($new) {
      $track_html .= '<tr><td><b>NEW!</b> </td><td>';
    } else {
      $track_html .= '<tr><td></td><td>';
    }
    # Create a direct download link for each track format
    if ($published) {
      foreach($track_format as $format_ext => $format_name) {
        $track_html .= sprintf( '<a href="http://coolcavemen.com/%s%s">'
                              , $track_file
                              , $format_ext
                              );
        $track_html .= sprintf('%s</a> ', $format_name);
      }
    }
    if (! $published) $track_html .= '<span class="disabled">';
    $track_html .= '&mdash; ';
    # Show track as non-available, and print its release date
    if (! $published)
      $track_html .= sprintf( '<b>%s %s, %sh &raquo;</b> '
                            , date("j", $track_date)
                            , $months[(int) date("n", $track_date)]
                            , date("H", $track_date)
                            );
    $track_html .= sprintf('%s<br/>', $track_title);
    if (! $published) $track_html .= '</span>';
    $track_html .= '</td></tr>';
    if ($published) {
      $html_published .= $track_html;
    } else {
      $html_unpublished .= $track_html;
    }
  }
  return $html_published.'</table><hr/>'.$html_unpublished.'</table>';
}

?>