PSR7Sessions\Storageless\Session\LazySession

Complexity

Total Complexity

13

Size/Duplication

Total Lines	110
Duplicated Lines	0 %

Coupling/Cohesion

Components	1
Dependencies	1

Test Coverage

Coverage

100%

Importance

Changes

0

<?php
final class LazySession implements SessionInterface
{
    /** @internal do not access directly: use {@see LazySession::getRealSession} instead */
    private ?SessionInterface $realSession = null;

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Syntax error, unexpected '?', expecting T_FUNCTION or T_CONST

    /** @var callable */
    private $sessionLoader;

    /**
     * Instantiation via __construct is not allowed, use {@see LazySession::fromContainerBuildingCallback} instead
     */
    private function __construct()
    {
    }

    public static function fromContainerBuildingCallback(callable $sessionLoader) : self
    {
        $instance = new self();

        $instance->sessionLoader = $sessionLoader;

        return $instance;
    }

    /**
     * {@inheritDoc}
     */
    public function set(string $key, $value) : void
    {
        $this->getRealSession()->set($key, $value);
    }

    /**
     * {@inheritDoc}
     */
    public function get(string $key, $default = null)
    {
        return $this->getRealSession()->get($key, $default);
    }

    public function remove(string $key) : void
    {
        $this->getRealSession()->remove($key);
    }

    public function clear() : void
    {
        $this->getRealSession()->clear();
    }

    public function has(string $key) : bool
    {
        return $this->getRealSession()->has($key);
    }

    public function hasChanged() : bool
    {
        return $this->realSession && $this->realSession->hasChanged();
    }

    public function isEmpty() : bool
    {
        return $this->getRealSession()->isEmpty();
    }

    public function jsonSerialize() : object
    {
        return $this->getRealSession()->jsonSerialize();
    }

    /**
     * Get or initialize the session
     */
    private function getRealSession() : SessionInterface
    {
        return $this->realSession ?? $this->realSession = $this->loadSession();
    }

    /**
     * Type-safe wrapper that ensures that the given callback returns the expected type of object, when called
     */
    private function loadSession() : SessionInterface
    {
        $sessionLoader = $this->sessionLoader;

        return $sessionLoader();
    }
}