Nested quotes about jolitypo HOT 6 OPEN

<?php
namespace JoliTypo\Fixer;

use JoliTypo\Exception\BadFixerConfigurationException;
use JoliTypo\Fixer;
use JoliTypo\FixerInterface;
use JoliTypo\LocaleAwareFixerInterface;
use JoliTypo\StateBag;
use JoliTypo\Fixer\BaseOpenClosePair;

class NestedQuotes extends BaseOpenClosePair implements
    FixerInterface,
    LocaleAwareFixerInterface
{
    const LSAQUO = '‹'; // &lsaquo;
    const RSAQUO = '›'; // &rsaquo;
    const LSQUO = '‘'; // &lsquo;
    const RSQUO = '’ '; // &rsquo;
    const SBQUO = '‚'; // &sdquo;

    protected $opening;
    protected $openingSuffix = '';
    protected $closing;
    protected $closingPrefix = '';

    public function __construct($locale)
    {
        $this->setLocale($locale);
    }

    public function fix($content, StateBag $stateBag = null)
    {
        if (!$this->opening || !$this->closing) {
            throw new BadFixerConfigurationException();
        }

        // Fix complex siblings cases
        if ($stateBag) {
            $content = $this->fixViaState(
                $content,
                $stateBag,
                'SmartQuotesOpenSolo',
                "@(^|\s|\()'([^']*)$@im",
                "@(^|[^']+)'@im",
                $this->opening . $this->openingSuffix,
                $this->closingPrefix . $this->closing
            );
        }

        // Fix simple cases
        $content = preg_replace(
            "@(^|\s|\()'([^']+)'@im",
            '$1' .
                $this->opening .
                $this->openingSuffix .
                '$2' .
                $this->closingPrefix .
                $this->closing,
            $content
        );

        return $content;
    }

    /**
     * Default configuration for supported lang.
     *
     * @param string $locale
     */
    public function setLocale($locale)
    {
        // Handle from locale + country
        switch (strtolower($locale)) {
            // “…”
            case 'pt-br':
                $this->opening = NestedQuotes::LSQUO;
                $this->openingSuffix = '';
                $this->closing = NestedQuotes::RSQUO;
                $this->closingPrefix = '';

                return;
            // «…»
            case 'de-ch':
                $this->opening = NestedQuotes::LSAQUO;
                $this->openingSuffix = '';
                $this->closing = NestedQuotes::RSAQUO;
                $this->closingPrefix = '';

                return;
        }

        // Handle from locale only
        $short = Fixer::getLanguageFromLocale($locale);

        switch ($short) {
            // « … »
            case 'fr':
                $this->opening = NestedQuotes::LSAQUO;
                $this->openingSuffix = NestedQuotes::NO_BREAK_SPACE;
                $this->closing = NestedQuotes::RSAQUO;
                $this->closingPrefix = NestedQuotes::NO_BREAK_SPACE;
                break;
            // «…»
            case 'hy':
            case 'az':
            case 'hz':
            case 'eu':
            case 'be':
            case 'ca':
            case 'el':
            case 'it':
            case 'no':
            case 'fa':
            case 'lv':
            case 'pt':
            case 'ru':
            case 'es':
            case 'uk':
                $this->opening = NestedQuotes::LSAQUO;
                $this->openingSuffix = '';
                $this->closing = NestedQuotes::RSAQUO;
                $this->closingPrefix = '';
                break;
            // „…“
            case 'de':
            case 'ka':
            case 'cs':
            case 'et':
            case 'is':
            case 'lt':
            case 'mk':
            case 'ro':
            case 'sk':
            case 'sl':
            case 'wen':
                $this->opening = NestedQuotes::SBQUO;
                $this->openingSuffix = '';
                $this->closing = NestedQuotes::LSQUO;
                $this->closingPrefix = '';
                break;
            // “…”
            case 'en':
            case 'us':
            case 'gb':
            case 'af':
            case 'ar':
            case 'eo':
            case 'id':
            case 'ga':
            case 'ko':
            case 'br':
            case 'th':
            case 'tr':
            case 'vi':
                $this->opening = NestedQuotes::LSQUO;
                $this->openingSuffix = '';
                $this->closing = NestedQuotes::RSQUO;
                $this->closingPrefix = '';
                break;
            // ”…”
            case 'fi':
            case 'sv':
            case 'bs':
                $this->opening = NestedQuotes::RSQUO;
                $this->openingSuffix = '';
                $this->closing = NestedQuotes::RSQUO;
                $this->closingPrefix = '';
                break;
        }
    }

    /**
     * @param string $opening
     */
    public function setOpening($opening)
    {
        $this->opening = $opening;
    }

    /**
     * @param string $openingSuffix
     */
    public function setOpeningSuffix($openingSuffix)
    {
        $this->openingSuffix = $openingSuffix;
    }

    /**
     * @param string $closing
     */
    public function setClosing($closing)
    {
        $this->closing = $closing;
    }

    /**
     * @param string $closingPrefix
     */
    public function setClosingPrefix($closingPrefix)
    {
        $this->closingPrefix = $closingPrefix;
    }
}