calculate tag + some more stuff.php

<?php

namespace Statamic\Addons\Calculate;

use Statamic\Extend\Tags;
use Statamic\API\Collection;
use Statamic\API\Entry;
use Statamic\API\YAML;

class CalculateTags extends Tags
{
    /**
     * The {{ calculate }} tag
     *
     * @return string|array
     */
    public function index()
    {
      $id = (string) $this->getParam('id');
      $send = (string) $this->getParam('send');
      $file = realpath('.') . '/site/storage/forms/prijsaanvraag/' . $id . '.yaml';
      if(!file_exists($file)){

        return ['to404' =>  true];
      }

      $content = file_get_contents($file);
      $data = YAML::parse($content);

      $bedrijf = $data['bedrijf'];
      $emailAddress = $data['email'];
      $branding = (array) @$data['branding'];
      $webdesign = (array )@$data['webdesign'];
      $content_creatie = (array) @$data['content_creatie'];
      $marketing = (array) @$data['marketing'];


      $all = array_merge( $branding , $webdesign ,$content_creatie, $marketing);
      $vanaf = 0;
      $tot = 0;


      $entries = Entry::whereCollection('prijsaanvraag');
      foreach($entries as $entry){
        $data = $entry->data();

        if(in_array($data['title'], $all))
        {
          $vanaf += (int) @$data ['prijs_vanaf'];
          $tot += (int) @$data['prijs_tot'];
        }
      }

      $pricing = ['vanaf' => $vanaf, 'tot' => $tot];
      $vars = [
        'bedrijf' => $bedrijf,
        'email' => $emailAddress,
        'pricing' => $pricing,
        'branding' => $branding,
        'webdesign' => $webdesign,
        'marketing' => $marketing,
        'content_creatie' => $content_creatie,
        'to404' => false
      ];

      if($send)
      {
        $email = \Statamic\API\Email::create();
        $email->to($emailAddress)->subject('Uw prijsaanvraag van Figure8')->with($vars)->template('prijsaanvraag');
        $email->send();
      }

      
      return $vars;
      
    }

    /**
     * The {{ calculate:example }} tag
     *
     * @return string|array
     */
    public function example()
    {
        //
    }
}