PHP code example of robertogallea / laravel-visitor

    
        
<?php
require_once('vendor/autoload.php');

/* Start to develop here. Best regards https://php-download.com/ */

    

robertogallea / laravel-visitor example snippets

public function process() 
{
  $result = '';
  foreach ($this->elements as $element) {
    if ($element instanceof FooClass) {
      $result .= ((FooClass)$element)->getData();
    } elseif ($element instanceof BarClass) {
      $result .= ((BarClass)$element)->getData();
    } elseif ($element instanceof BazClass) {
      $result .= ((BazClass)$element)->getData();
    }
  }
}

public function process() 
{
  $visitor = new MyVisitor([
    new FooClass(),
    new BarClass(),
    new BazClass(),
  ]);
  
  $visitor->execute();
  
  $result = $visitor->getResult();
}

class MyVisitor extends Visitor
{
  private $result;
  
  public function getResult()
  {
    return $this->result;
  }
  
  public function visitFooClass(FooClass $fooClass) 
  {
    $this->result .= ... ;
  }
  
  public function visitBarClass(BarClass $fooClass) 
  {
    $this->result .= ... ;
  }
  
  public function visitBazClass(BazClass $fooClass) 
  {
    $this->result .= ... ;
  }
}

public function visitBook(Book $book) {
  ...
}

use robertogallea\LaravelVisitor\Models\Visitable;

class Magazine
{
    use Visitable;

    private $title;
    private $month;
    private $year;

    public function __construct($title, $month, $year)
    {
        $this->title = $title;
        $this->month = $month;
        $this->year = $year;
    }

    public function getTitle()
    {
        return $this->title;
    }

    public function getMonth()
    {
        return $this->month;
    }

    public function getYear()
    {
        return $this->year;
    }

}

use robertogallea\LaravelVisitor\Models\Visitor;

class XMLVisitor extends Visitor
{
    private $xml = '';    

    public function visitMagazine(Magazine $magazine)
    {
        $this->xml .= '<magazine title="' . $magazine->getTitle() . '" ' .
            'issue="' . $magazine->getMonth() . ' ' . $magazine->getYear() . '"></magazine>' . PHP_EOL;
    }

    public function getResult()
    {
        return $this->xml;
    }
}

  $xmlCatalog = new XMLVisitor([
    new Magazine('PHP programming', 'July', 2019)
    new Magazine('The art of woodworking', 'August', 2019)
  ]);

  $xmlCatalog->execute();
  
  echo($xmlCatalog->getResult());