world-game/site/templates/project.json.php

<?php

$specificData = [
  'tagline' => $page->tagline()->value(),
  'description' => $page->description()->kt(),
  'cover' => $page->cover()->toFile()?->url(),
  'gallery' => $page->files()->filterBy('template', 'image')->map(function($img) {
    return $img->url();
  })->values(),
  'impact' => $page->impact()->split(','),
  'category' => $page->category()->value(),
  'platforms' => $page->platforms()->split(','),
  'clientName' => $page->clientName()->value(),
  'appleLink' => $page->appleLink()->value(),
  'androidLink' => $page->androidLink()->value(),
  'webLink' => $page->webLink()->value(),
  'prev' => $page->prev() ? [
    'title' => $page->prev()->title()->value(),
    'url' => $page->prev()->url()
  ] : null,
  'next' => $page->next() ? [
    'title' => $page->next()->title()->value(),
    'url' => $page->next()->url()
  ] : null,
  'parentUrl' => $page->parent()->url()
];

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

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