<?php

$specificData = [
  'description' => $page->description()->value(),
  'rules' => $page->rules()->toBlocks(),
  'game_status' => $page->game_status()->value(),
  'is_embedded' => $page->is_embedded()->toBool(),
  'play_link' => $page->play_link()->value(),
  'cover' => $page->cover()->toFile()?->url(),
  'parent_url' => $page->parent()->url()
];

$pageData = array_merge($genericData, $specificData);

header('Content-Type: application/json');
echo json_encode($pageData);