Environment.php
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Environment.php
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	<?php

	namespace Nasqueron\SAAS\MediaWiki;

	use Dotenv\Dotenv;
	use Dotenv\Exception\ValidationException;

	class Environment {

	/**
	* @var bool
	*/
	static private $isLoaded = false;

	/**
	* Loads the environment, if it hasn't been loaded before.
	*/
	public static function load () : void {
	if (!self::$isLoaded) {
	$directory = self::getDirectory();
	$dotenv = new Dotenv($directory);
	$dotenv->safeLoad();
	try {
	$dotenv->required(self::getRequiredVariables());
	} catch (ValidationException $exception) {
	Service::serveInternalErrorResponse($exception);
	}
	self::$isLoaded = true;
	}
	}

	public static function isLoaded () : bool {
	return self::$isLoaded;
	}

	public static function get ($variableName, $defaultValue = "") : string {
	return $_ENV[$variableName] ?? $defaultValue;
	}

	private static function getDirectory () : string {
	return dirname(__DIR__);
	}

	private static function getRequiredVariables () : array {
	return [
	'MEDIAWIKI_ENTRY_POINT',
	'MEDIAWIKI_SECRET_KEY',
	'DB_HOST',
	'DB_USER',
	'DB_PASS',
	];
	}

	public static function isBSD () : bool {
	static $system;
	$system = php_uname("s");
	return substr($system, -3) === "BSD" \|\| $system === "DragonFly";
	}
	}