TranslateLabelSelectViewHelper.php

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<?php
namespace TYPO3\CMS\Belog\ViewHelpers\Form;

class TranslateLabelSelectViewHelper extends \TYPO3\CMS\Fluid\ViewHelpers\Form\SelectViewHelper {

    public function initializeArguments() {
        parent::initializeArguments();
        $this->registerArgument('optionLabelPrefix', 'string', 'Prefix for locallang lookup');
    }

    protected function getOptions() {
        $options = parent::getOptions();
        foreach ($options as $value => $label) {
            $options[$value] = $this->translateLabel($label);
        }
        return $options;
    }

    protected function translateLabel($label) {
        if ($label === '') {
            return '';
        }
        $labelKey = $this->hasArgument('optionLabelPrefix') ? $this->arguments['optionLabelPrefix'] . $label : $label;
        $translatedLabel = \TYPO3\CMS\Extbase\Utility\LocalizationUtility::translate($labelKey, $this->controllerContext->getRequest()->getControllerExtensionName());
        return $translatedLabel ?: $label;
    }

}