ChainValidator.php

<?php

namespace WPDesk\Forms\Validator;

use WPDesk\Forms\Validator;

class ChainValidator implements Validator {

	/** @var Validator[] */
	private $validators;

	/** @var array */
	private $messages;

	public function __construct() {
		$this->validators = [];
		$this->messages   = [];
	}

	/**
	 * @param Validator $validator
	 *
	 * @return $this
	 */
	public function attach( Validator $validator ): self {
		$this->validators[] = $validator;

		return $this;
	}

	public function is_valid( $value ): bool {
		$result   = true;
		$messages = [ [] ];
		foreach ( $this->validators as $validator ) {
			if ( ! $validator->is_valid( $value ) ) {
				$result     = false;
				$messages[] = $validator->get_messages();
			}
		}
		$this->messages = array_merge( ...$messages );

		return $result;
	}

	public function get_messages(): array {
		return $this->messages;
	}

}