PluralVariants.php

<?php

namespace Drupal\config_translation\FormElement;

use Drupal\Component\Gettext\PoItem;
use Drupal\Component\Render\FormattableMarkup;
use Drupal\Core\Config\Config;
use Drupal\Core\Language\LanguageInterface;
use Drupal\language\Config\LanguageConfigOverride;

/**
 * Defines form elements for plurals in configuration translation.
 */
class PluralVariants extends FormElementBase {
    
    /**
     * {@inheritdoc}
     */
    protected function getSourceElement(LanguageInterface $source_language, $source_config) {
        $plurals = $this->getNumberOfPlurals($source_language->getId());
        $values = explode(PoItem::DELIMITER, $source_config);
        $element = [
            '#type' => 'fieldset',
            '#title' => new FormattableMarkup('@label <span class="visually-hidden">(@source_language)</span>', [
                // Labels originate from configuration schema and are translatable.
'@label' => $this->t($this->definition
                    ->getLabel()),
                '@source_language' => $source_language->getName(),
            ]),
            '#tree' => TRUE,
        ];
        for ($i = 0; $i < $plurals; $i++) {
            $element[$i] = [
                '#type' => 'item',
                // @todo Should use better labels https://www.drupal.org/node/2499639
'#title' => $i == 0 ? $this->t('Singular form') : $this->formatPlural($i, 'First plural form', '@count. plural form'),
                '#markup' => new FormattableMarkup('<span lang="@langcode">@value</span>', [
                    '@langcode' => $source_language->getId(),
                    '@value' => $values[$i] ?? $this->t('(Empty)'),
                ]),
            ];
        }
        return $element;
    }
    
    /**
     * {@inheritdoc}
     */
    protected function getTranslationElement(LanguageInterface $translation_language, $source_config, $translation_config) {
        $plurals = $this->getNumberOfPlurals($translation_language->getId());
        $values = explode(PoItem::DELIMITER, $translation_config);
        $element = [
            '#type' => 'fieldset',
            '#title' => new FormattableMarkup('@label <span class="visually-hidden">(@translation_language)</span>', [
                // Labels originate from configuration schema and are translatable.
'@label' => $this->t($this->definition
                    ->getLabel()),
                '@translation_language' => $translation_language->getName(),
            ]),
            '#tree' => TRUE,
        ];
        for ($i = 0; $i < $plurals; $i++) {
            $element[$i] = [
                '#type' => 'textfield',
                // @todo Should use better labels https://www.drupal.org/node/2499639
'#title' => $i == 0 ? $this->t('Singular form') : $this->formatPlural($i, 'First plural form', '@count. plural form'),
                '#default_value' => $values[$i] ?? '',
                '#attributes' => [
                    'lang' => $translation_language->getId(),
                ],
            ];
        }
        return $element;
    }
    
    /**
     * {@inheritdoc}
     */
    public function setConfig(Config $base_config, LanguageConfigOverride $config_translation, $config_values, $base_key = NULL) {
        $config_values = implode(PoItem::DELIMITER, $config_values);
        parent::setConfig($base_config, $config_translation, $config_values, $base_key);
    }

}