<?php

// UPDATE TRACKS INDEX OF ALL RELEASE EACH TIME SOMETHING HAPPENS WITH A RELEASE

// Each time something happens with a page
kirby()->hook('panel.page.*', function($page, $oldPage = null) {
  // If the page is a release
  if($page->intendedTemplate() == 'release') {

    // Get all artists
    $artists = site()->index()->filterBy('intendedTemplate', 'artist');

    // For each artist
    foreach ($artists as $key => $a) {
        $index = 0;

        // For each release of the artist
        foreach ($a->children()->published() as $key => $p) {
          // Get all tracks of the release
          $tracks = $p->tracklist()->toStructure();

          // For each track
          foreach ($tracks as $key => $t) {
            
            // If the track has and audio file
            if($file = $t->audioFile()->toFile()) {
              // Update the track index
              $file->update(['trackIndex' => $index]);
              $index++;
            }
          }
        }
    }

  }
});