Chris@0: <?php
Chris@0: 
Chris@0: namespace Drupal\{{ machine_name }}\Plugin\Menu;
Chris@0: 
Chris@0: use Drupal\Core\Database\Connection;
Chris@0: use Drupal\Core\Menu\MenuLinkDefault;
Chris@0: use Drupal\Core\Menu\StaticMenuLinkOverridesInterface;
Chris@0: use Symfony\Component\DependencyInjection\ContainerInterface;
Chris@0: 
Chris@0: /**
Chris@0:  * A menu link that displays count of messages.
Chris@0:  */
Chris@0: class {{ class }} extends MenuLinkDefault {
Chris@0: 
Chris@0:   /**
Chris@0:    * The database connection.
Chris@0:    *
Chris@0:    * @var \Drupal\Core\Database\Connection
Chris@0:    */
Chris@0:   protected $dbConnection;
Chris@0: 
Chris@0:   /**
Chris@0:    * Constructs the plugin object.
Chris@0:    *
Chris@0:    * @param array $configuration
Chris@0:    *   A configuration array containing information about the plugin instance.
Chris@0:    * @param string $plugin_id
Chris@0:    *   The plugin_id for the plugin instance.
Chris@0:    * @param mixed $plugin_definition
Chris@0:    *   The plugin implementation definition.
Chris@0:    * @param \Drupal\Core\Menu\StaticMenuLinkOverridesInterface $static_override
Chris@0:    *   The static override storage.
Chris@0:    * @param \Drupal\Core\Database\Connection $db_connection
Chris@0:    *   The database connection.
Chris@0:    */
Chris@0:   public function __construct(array $configuration, $plugin_id, $plugin_definition, StaticMenuLinkOverridesInterface $static_override, Connection $db_connection) {
Chris@0:     parent::__construct($configuration, $plugin_id, $plugin_definition, $static_override);
Chris@0:     $this->dbConnection = $db_connection;
Chris@0:   }
Chris@0: 
Chris@0:   /**
Chris@0:    * {@inheritdoc}
Chris@0:    */
Chris@0:   public static function create(ContainerInterface $container, array $configuration, $plugin_id, $plugin_definition) {
Chris@0:     return new static(
Chris@0:       $configuration,
Chris@0:       $plugin_id,
Chris@0:       $plugin_definition,
Chris@0:       $container->get('menu_link.static.overrides'),
Chris@0:       $container->get('database')
Chris@0:     );
Chris@0:   }
Chris@0: 
Chris@0:   /**
Chris@0:    * {@inheritdoc}
Chris@0:    */
Chris@0:   public function getTitle() {
Chris@0:     $count = $this->dbConnection->query('SELECT COUNT(*) FROM {messages}')->fetchField();
Chris@0:     return $this->t('Messages (@count)', ['@count' => $count]);
Chris@0:   }
Chris@0: 
Chris@0:   /**
Chris@0:    * {@inheritdoc}
Chris@0:    */
Chris@0:   public function getRouteName() {
Chris@0:     return '{{ machine_name }}.messages';
Chris@0:   }
Chris@0: 
Chris@0:   /**
Chris@0:    * {@inheritdoc}
Chris@0:    */
Chris@0:   public function getCacheTags() {
Chris@0:     // @DCG Invalidate this tags when messages are created or removed.
Chris@0:     return ['{{ machine_name }}.messages_count'];
Chris@0:   }
Chris@0: 
Chris@0: }