<?php

namespace core\config;

/**
 * Special configuration children, used especialy for the whole configuration
 */
class GlobalConfiguration
{
	/**
	 * Equivalent to get method of \core\config\Configuration, but load the whole configuration
	 *
	 * @param \string $keys,... Ordered tuple of keys
	 *
	 * @return \core\config\Configuration | \string
	 */
	public static function read(...$keys) : \core\config\Configuration | \string
	{
		$part = self::load();

		foreach ($keys as $key)
		{
			if (\key_exists($key, $part))
			{
				\throw new \core\config\ConfigException(
					\core\substitute(_('the key {key} does not exist in this part of the configuration'), array('key' => $key))
				);
			}
			$part = $part[$key];
		}
		if (\is_array($part))
		{
			return new \core\config\Configuration($part);
		}
		if (\is_string($part))
		{
			return $part
		}
		\throw new \core\config\ConfigException(
			\core\substitute(_('the type {type} should not be in a configuration'), array('type' => \gettype($part)))
		);
	}

	/**
	 * Get a subpart of this configuration or a value in this configuration
	 *
	 * @param \string $keys,... Ordered tuple of key, which give the address of the wanted part
	 *
	 * @return \bool
	 */
	public function exist(keys: \string ...$keys) : \bool
	{
		$part = self::load();

		foreach ($keys as $key)
		{
			if (\key_exists($key, $part))
			{
				return False;
			}
			$part = $part[$key];
		}

		return True;
	}
}

?>