manifest_parser_example.php

<?php

declare(strict_types=1);

use InvalidArgumentException;
use RuntimeException;

class ViteAssets
{
  private ?array $viteManifest = null;
  private bool $devMode = false;

  public function viteAssets(string $url): string
  {
    $result = '';
    $manifest = $this->getViteManifest();

    if ($this->devMode) {
      return '<script defer src="' . $manifest['url'] . $url . '" type="module"></script>';
    }

    if (array_key_exists($url, $manifest)) {
      $manifestData = $manifest[$url];
      $result .= '<script defer src="/build/' . $manifestData['file'] . '" type="module"></script>';
      if (! empty($manifestData['css'])) {
        foreach ($manifestData['css'] as $css) {
          $result .= '<link rel="stylesheet" href="/build/' . $css . '">';
        }
      }
      return $result;
    }

    throw new InvalidArgumentException('Unable to locate the asset: ' . $url);
  }

  private function getViteManifest()
  {
    if (! $this->viteManifest) {
      $prodFile = PUBLIC_PATH . 'build/manifest.json';
      $devFile = PUBLIC_PATH . 'build/manifest.dev.json';
      if (is_file($devFile)) {
        $this->devMode = true;
        $manifestFileContent = file_get_contents($devFile);
      } elseif (is_file($prodFile)) {
        $manifestFileContent = file_get_contents($prodFile);
      } else {
        throw new RuntimeException('manifest.json file not found. Pleas run the "npm run build" command');
      }

      $this->viteManifest = json_decode($manifestFileContent, true, 512, JSON_THROW_ON_ERROR);
    }

    return $this->viteManifest;
  }
}