<?php

class Model extends Entity implements IteratorAggregate {
	
	protected static
		$type,
		$subType,
		$rootType,
		$parentType = 'Provider';
	
	protected function __construct ( $data, Provider $provider ) {
		
		parent::__construct($data, $provider);
		
		// extends model
		if ( !empty($this->data['extends']) ) {
			
			if ( !$parentData = $provider->getChildrenData('Model', $this->data['extends']) )
				throw new Exception(sprintf(
					'Parent Model "%3$s" for Child Model "%2$s" in Provider "%1$s" does not exists !',
					$provider->getName(),
					$this->data['name'],
					$this->data['extends']
				));
			
			// extends services
			$this->data['children']['Service'] = array_merge(
				!empty($parentData['children']['Service']) ? $parentData['children']['Service'] : array(),
				!empty($this->data['children']['Service']) ? $this->data['children']['Service'] : array()
			);
			
			// extends views
			$this->data['children']['View'] = array_merge(
				!empty($parentData['children']['View']) ? $parentData['children']['View'] : array(),
				!empty($this->data['children']['View']) ? $this->data['children']['View'] : array()
			);
			
		}
		
	}
	
	public function getIterator () {
		
		return $this->__get('Field');
		
	}
	
	public function apply () {
		
		$errors = array();
		foreach ( $this->model->Field as $name => $field )
			if ( $field->apply($this->data) )
		
		return $this;
		
	}
	
	public function invalid () {
		
		$errors = array();
		foreach ( $this->model->Field as $name => $field )
			if ( $error = $field->invalid(
				!empty($this->data[$field->getName()]) ? $this->data[$field->getName()] : null
			) );// $errors[] = $error;
		
		return $errors;
		
	}
	
	public function getState ( $service, $data = array() ) {
		
		if ( $service )
			return $this->getModel()->Service->$service->getState($data);
		
		throw new Exception(sprintf(
			'Method "%1$s->%2$s" must be reimplemented in child class "%3$s" !',
			__CLASS__,
			__METHOD__,
			$this::getSubType()
		));
		
	}
	
	public function getEntityObject ( $data = array() ) {
		
		return new EntityObject($this, $data);
		
	}
	
}

?>