<?php
/**
 * @link      http://github.com/zendframework/zend-view for the canonical source repository
 * @copyright Copyright (c) 2005-2016 Zend Technologies USA Inc. (http://www.zend.com)
 * @license   http://framework.zend.com/license/new-bsd New BSD License
 */

namespace Zend\View\Helper;

use Zend\I18n\Translator\TranslatorInterface as Translator;

/**
 * Trait for implementing Zend\I18n\Translator\TranslatorAwareInterface.
 *
 * This can be used by helpers that need to implement the interface,
 * whether via explicit implementation or duck typing.
 */
trait TranslatorAwareTrait
{
    /**
     * Translator (optional)
     *
     * @var Translator
     */
    protected $translator;

    /**
     * Translator text domain (optional)
     *
     * @var string
     */
    protected $translatorTextDomain = 'default';

    /**
     * Whether translator should be used
     *
     * @var bool
     */
    protected $translatorEnabled = true;

    /**
     * Sets translator to use in helper
     *
     * @param  Translator $translator  [optional] translator.
     *                                 Default is null, which sets no translator.
     * @param  string     $textDomain  [optional] text domain
     *                                 Default is null, which skips setTranslatorTextDomain
     * @return HeadTitle
     */
    public function setTranslator(Translator $translator = null, $textDomain = null)
    {
        $this->translator = $translator;
        if (null !== $textDomain) {
            $this->setTranslatorTextDomain($textDomain);
        }
        return $this;
    }

    /**
     * Returns translator used in helper
     *
     * @return Translator|null
     */
    public function getTranslator()
    {
        if (! $this->isTranslatorEnabled()) {
            return;
        }

        return $this->translator;
    }

    /**
     * Checks if the helper has a translator
     *
     * @return bool
     */
    public function hasTranslator()
    {
        return (bool) $this->getTranslator();
    }

    /**
     * Sets whether translator is enabled and should be used
     *
     * @param  bool $enabled [optional] whether translator should be used.
     *                       Default is true.
     * @return HeadTitle
     */
    public function setTranslatorEnabled($enabled = true)
    {
        $this->translatorEnabled = (bool) $enabled;
        return $this;
    }

    /**
     * Returns whether translator is enabled and should be used
     *
     * @return bool
     */
    public function isTranslatorEnabled()
    {
        return $this->translatorEnabled;
    }

    /**
     * Set translation text domain
     *
     * @param  string $textDomain
     * @return HeadTitle
     */
    public function setTranslatorTextDomain($textDomain = 'default')
    {
        $this->translatorTextDomain = $textDomain;
        return $this;
    }

    /**
     * Return the translation text domain
     *
     * @return string
     */
    public function getTranslatorTextDomain()
    {
        return $this->translatorTextDomain;
    }
}