Laravel Model Decorator

modeldecorator.php

<?php

/**
 * ModelDecorator Class
 * Decorate Models to seperate out common logic
 * 
 * @author  Lucas Nolte <[email protected]>
 */

class Modeldecorator {
  /**
   * The Model to Decorate
   * @var Object
   */
  protected $parent = null;
  
  /**
   * Attributes of the Decorator
   * @var array
   */
  public $attributes = array();

  /**
   * Fields of the Decorator (when using form building)
   * @var array
   */
  public $fields = array();

  /**
   * instantiate a new Model
   * @param Object $parent Model-Instance to decorate
   */
  public function __construct($parent) {
    // Set the parent
    $this->parent = $parent;

    // Add attributes and their default value to the model
    foreach($this->attributes as $key => $val) {
      $this->parent->attributes[$key] = $val;
    }
  }
  
  /**
   * Calls function on the original model
   * @param  string $name name of the function to call
   * @param  array $args  arguments of the functino
   * @return mixed        output of the original function
   */
  public function __call($name, $args) {
    call_user_func_array(array($this->parent, $name), $args);
  }

  /**
   * Set Attributes on the original model
   * @param string $name  name of the attribute
   * @param mixed  $value value to set
   */
  public function __set($name, $value) {
    // Generate method name for custom setter
    $method = 'set_'.$name;

    // Check if custom setter exists on the decorator
    if(method_exists($this, $method)) {
      $this->{$method}($value);
    }
    // Check if custom setter exists on the original model
    elseif(method_exists($this->parent, $method)) {
      $this->parent->{$method}($value);
    }
    // If not, just set the attribute
    else {
      $this->parent->set_attribute($name, $value);
    }
  }

  /**
   * Redirect gets to the original model
   * @param  string $name attribute to get
   * @return mixed        value of attribute
   */
  public function __get($name) {
    return $this->parent->{$name};
  }
}

publishable.php

<?php

class Publishable extends Modeldecorator {

  public $attributes = array(
    'published' => 0,
    'published_at' => 0
  );

	public function publish() {
		$this->parent->set_attribute('published', 1);
		$this->parent->set_attribute('published_at', new \DateTime);
		$this->parent->save();
	}

	public function unpublish() {
		$this->parent->set_attribute('published', 0);
		$this->parent->save();
  }
}

user.php

<?php

class User extends Eloquent {

  public static function forge() {
    // Create instance
    $user = new self;

    // Decorate it
    $user = new Publishable($user);
    
    // Return it
    return $user;
  }

	public $fields = array(
		'email' => 'text',
		'password' => 'password'
	);

	public function set_password($password) {
		$this->set_attribute('password', Hash::make($password));
	}
}