nulib/php/src_output/say.php

<?php
namespace nulib\output;

use nulib\ValueException;
use nulib\output\std\ProxyMessenger;

/**
 * Class say: afficher un message sur la console uniquement
 *
 * Cette classe (ou la classe parallèle {@link msg} DOIT être initialisée avant
 * d'être utilisée
 */
class say extends _messenger {
  static function set_messenger(IMessenger $say) {
    self::$say = $say;
  }

  static function set_messenger_class(string $say_class, ?array $params=null) {
    if (!is_subclass_of($say_class, IMessenger::class)) {
      throw ValueException::invalid_class($say_class, IMessenger::class);
    }
    self::$say = new $say_class($params);
  }

  static function get(): IMessenger {
    if (self::$msg === null) {
      $msg = self::$say;
      if ($msg === null) $msg = new ProxyMessenger();
      self::$msg = $msg;
    }
    return self::$msg;
  }
}