File Manager Lite

/**
     * Create a new AliasLoader instance.
     *
     * @param  array  $aliases
     */
    private function __construct($aliases)
    {
        $this->aliases = $aliases;
    }

/**
     * Get or create the singleton alias loader instance.
     *
     * @param  array  $aliases
     * @return \Illuminate\Foundation\AliasLoader
     */
    public static function getInstance(array $aliases = [])
    {
        if (is_null(static::$instance)) {
            return static::$instance = new static($aliases);
        }

$aliases = array_merge(static::$instance->getAliases(), $aliases);

static::$instance->setAliases($aliases);

return static::$instance;
    }

/**
     * Load a class alias if it is registered.
     *
     * @param  string  $alias
     * @return bool|null
     */
    public function load($alias)
    {
        if (static::$facadeNamespace && str_starts_with($alias, static::$facadeNamespace)) {
            $this->loadFacade($alias);

return true;
        }

if (isset($this->aliases[$alias])) {
            return class_alias($this->aliases[$alias], $alias);
        }
    }

/**
     * Load a real-time facade for the given alias.
     *
     * @param  string  $alias
     * @return void
     */
    protected function loadFacade($alias)
    {
        require $this->ensureFacadeExists($alias);
    }

/**
     * Ensure that the given alias has an existing real-time facade class.
     *
     * @param  string  $alias
     * @return string
     */
    protected function ensureFacadeExists($alias)
    {
        if (is_file($path = storage_path('framework/cache/facade-'.sha1($alias).'.php'))) {
            return $path;
        }

$stub = $this->formatFacadeStub(
            $alias, file_get_contents(__DIR__.'/stubs/facade.stub')
        );

// Atomic write to prevent race conditions...
        $tempPath = tempnam(dirname($path), 'facade-');

// Fix permissions of tempPath because `tempnam()` creates it with permissions set to 0600...
        @chmod($tempPath, 0777 - umask());

file_put_contents($tempPath, $stub);

rename($tempPath, $path);

return $path;
    }

/**
     * Format the facade stub with the proper namespace and class.
     *
     * @param  string  $alias
     * @param  string  $stub
     * @return string
     */
    protected function formatFacadeStub($alias, $stub)
    {
        $replacements = [
            str_replace('/', '\\', dirname(str_replace('\\', '/', $alias))),
            class_basename($alias),
            substr($alias, strlen(static::$facadeNamespace)),
        ];

return str_replace(
            ['DummyNamespace', 'DummyClass', 'DummyTarget'], $replacements, $stub
        );
    }

/**
     * Add an alias to the loader.
     *
     * @param  string  $alias
     * @param  string  $class
     * @return void
     */
    public function alias($alias, $class)
    {
        $this->aliases[$alias] = $class;
    }

/**
     * Register the loader on the auto-loader stack.
     *
     * @return void
     */
    public function register()
    {
        if (! $this->registered) {
            $this->prependToLoaderStack();

$this->registered = true;
        }
    }

/**
     * Prepend the load method to the auto-loader stack.
     *
     * @return void
     */
    protected function prependToLoaderStack()
    {
        spl_autoload_register($this->load(...), true, true);
    }

/**
     * Get the registered aliases.
     *
     * @return array
     */
    public function getAliases()
    {
        return $this->aliases;
    }

/**
     * Set the registered aliases.
     *
     * @param  array  $aliases
     * @return void
     */
    public function setAliases(array $aliases)
    {
        $this->aliases = $aliases;
    }

/**
     * Indicates if the loader has been registered.
     *
     * @return bool
     */
    public function isRegistered()
    {
        return $this->registered;
    }

/**
     * Set the "registered" state of the loader.
     *
     * @param  bool  $value
     * @return void
     */
    public function setRegistered($value)
    {
        $this->registered = $value;
    }

/**
     * Set the real-time facade namespace.
     *
     * @param  string  $namespace
     * @return void
     */
    public static function setFacadeNamespace($namespace)
    {
        static::$facadeNamespace = rtrim($namespace, '\\').'\\';
    }

/**
     * Set the value of the singleton alias loader.
     *
     * @param  \Illuminate\Foundation\AliasLoader  $loader
     * @return void
     */
    public static function setInstance($loader)
    {
        static::$instance = $loader;
    }

/**
     * Clone method.
     *
     * @return void
     */
    private function __clone()
    {
        //
    }
}