Issue #3282696 by sanduhrs: Port of l10n_community: Add language statistics block

<?php

namespace Drupal\l10n_community\Plugin\Block;

use Drupal\Core\Block\BlockBase;

use Drupal\Core\Cache\Cache;

use Drupal\Core\Language\LanguageManager;

use Drupal\Core\Path\CurrentPathStack;

use Drupal\Core\Plugin\ContainerFactoryPluginInterface;

use Drupal\l10n_community\L10nStatistics;

use Symfony\Component\DependencyInjection\ContainerInterface;

/**]

 * Provides a language statistics block.

 *

 * @Block(

 *   id = "l10n_community_language_statistics",

 *   admin_label = @Translation("Language statistics"),

 *   category = @Translation("L10n")

 * )

 */

class LanguageStatisticsBlock extends BlockBase implements ContainerFactoryPluginInterface {

  /**

   * The l10n_community.statistics service.

   *

   * @var \Drupal\l10n_community\L10nStatistics

   */

  protected $statistics;

  /**

   * The language manager service.

   *

   * @var \Drupal\Core\Language\LanguageManager

   */

  protected LanguageManager $languageManager;

  /**

   * The current path stack service.

   *

   * @var \Drupal\Core\Path\CurrentPathStack

   */

  protected CurrentPathStack $currentPath;

  /**

   * Constructs a new LanguageStatisticsBlock instance.

   *

   * @param array $configuration

   *   The plugin configuration, i.e. an array with configuration values keyed

   *   by configuration option name. The special key 'context' may be used to

   *   initialize the defined contexts by setting it to an array of context

   *   values keyed by context names.

   * @param string $plugin_id

   *   The plugin_id for the plugin instance.

   * @param mixed $plugin_definition

   *   The plugin implementation definition.

   * @param \Drupal\l10n_community\L10nStatistics $statistics

   *   The l10n_community.statistics service.

   * @param \Drupal\Core\Language\LanguageManager $language_manager

   *   The language manager service.

   * @param \Drupal\Core\Path\CurrentPathStack $current_path

   *   The current path stack service.

   */

  public function __construct(

      array $configuration,

      $plugin_id,

      $plugin_definition,

      L10nStatistics $statistics,

      LanguageManager $language_manager,

      CurrentPathStack $current_path

  ) {

    parent::__construct($configuration, $plugin_id, $plugin_definition);

    $this->statistics = $statistics;

    $this->languageManager = $language_manager;

    $this->currentPath = $current_path;

  }

  /**

   * {@inheritdoc}

   */

  public static function create(

      ContainerInterface $container,

      array $configuration,

      $plugin_id,

      $plugin_definition

  ) {

    return new static(

      $configuration,

      $plugin_id,

      $plugin_definition,

      $container->get('l10n_community.statistics'),

      $container->get('language_manager'),

      $container->get('path.current')

    );

  }

  /**

   * {@inheritdoc}

   */

  public function build() {

    $path_items = explode('/', $this->currentPath->getPath());

    $languages = $this->languageManager->getLanguages();

    if (!isset($languages[$path_items[1]])) {

      return [];

    }

    $language = $languages[$path_items[1]];

    // Provide a summary of the activity.

    $stats_numbers = $this->statistics->getLanguageStatisticsByLanguage($language->getId());

    $items = [

      $this->formatPlural($stats_numbers['users'], '1 contributor', '@count contributors'),

      $this->formatPlural($stats_numbers['strings'], '1 string to translate', '@count strings to translate'),

      $this->formatPlural($stats_numbers['translations'], '1 translation recorded', '@count translations recorded'),

      $this->formatPlural($stats_numbers['suggestions'], '1 suggestion awaiting approval', '@count suggestions awaiting approval'),

    ];

    $build['content'] = [

      '#theme' => 'item_list',

      '#items' => $items,

    ];

    return $build;

  }

  /**

   * {@inheritdoc}

   */

  public function getCacheContexts() {

    return Cache::mergeContexts(

      parent::getCacheContexts(),

      ['url.path']

    );

  }

}