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<?php |
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declare(strict_types=1); |
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namespace FondBot\Application; |
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use FondBot\Drivers\Driver; |
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use FondBot\Channels\Channel; |
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use FondBot\Conversation\Intent; |
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use FondBot\Conversation\Context; |
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use FondBot\Conversation\Conversable; |
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use FondBot\Conversation\Interaction; |
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use FondBot\Conversation\IntentManager; |
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use FondBot\Conversation\ContextManager; |
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use FondBot\Drivers\Exceptions\InvalidRequest; |
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use FondBot\Drivers\Extensions\WebhookVerification; |
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class Kernel |
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{ |
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/** @var Kernel */ |
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protected static $instance; |
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private $container; |
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/** @var Context|null */ |
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private $context; |
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public function __construct(Container $container) |
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{ |
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$this->container = $container; |
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} |
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/** |
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* Get current driver instance. |
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* |
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* @return Driver |
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*/ |
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public function getDriver(): Driver |
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{ |
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return $this->container->get('driver'); |
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} |
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/** |
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* Get context instance. |
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* |
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* @return Context|null |
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*/ |
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public function getContext(): ?Context |
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{ |
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return $this->context; |
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} |
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/** |
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* Set context instance. |
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* |
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* @param Context $context |
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*/ |
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public function setContext(Context $context): void |
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{ |
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$this->context = $context; |
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} |
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/** |
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* Clear context. |
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*/ |
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public function clearContext(): void |
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{ |
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if ($this->context !== null) { |
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$this->contextManager()->clear($this->context); |
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$this->context = null; |
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} |
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} |
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/** |
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* Resolve from container. |
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* |
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* @param string $class |
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* |
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* @return mixed |
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*/ |
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public function resolve(string $class) |
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{ |
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return $this->container->get($class); |
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} |
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/** |
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* Process webhook request. |
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* |
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* @param Driver $driver |
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* @param Channel $channel |
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* |
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* @param array $request |
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* @param array $headers |
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* |
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* @return mixed |
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*/ |
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public function process(Driver $driver, Channel $channel, array $request, array $headers) |
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{ |
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try { |
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$this->container->add('driver', $driver); |
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$driver->fill($channel->getParameters(), $request, $headers); |
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// Driver has webhook verification |
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if ($driver instanceof WebhookVerification && $driver->isVerificationRequest()) { |
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return $driver->verifyWebhook(); |
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} |
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// Verify request |
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$driver->verifyRequest(); |
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// Resolve context |
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$this->context = $this->contextManager()->resolve($channel->getName(), $driver); |
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if ($this->context->getInteraction() !== null) { |
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$this->converse($this->context->getInteraction()); |
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} else { |
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$intent = $this->intentManager()->find($driver->getMessage()); |
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if ($intent !== null) { |
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$this->converse($intent); |
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} |
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} |
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if ($this->context !== null) { |
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$this->contextManager()->save($this->context); |
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} |
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return 'OK'; |
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} catch (InvalidRequest $exception) { |
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return $exception->getMessage(); |
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} |
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} |
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/** |
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* Start conversation. |
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* |
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* @param Conversable $conversable |
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*/ |
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public function converse(Conversable $conversable): void |
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{ |
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if ($conversable instanceof Intent) { |
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$this->context->setIntent($conversable); |
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$this->context->setInteraction(null); |
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$this->context->setValues([]); |
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$conversable->handle($this); |
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} elseif ($conversable instanceof Interaction) { |
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$conversable->handle($this); |
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} |
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} |
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/** |
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* Get context manager. |
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* |
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* @return ContextManager |
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*/ |
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private function contextManager(): ContextManager |
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{ |
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return $this->resolve(ContextManager::class); |
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} |
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/** |
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* Get intent manager. |
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* |
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* @return IntentManager |
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*/ |
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private function intentManager(): IntentManager |
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{ |
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return $this->resolve(IntentManager::class); |
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} |
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} |
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fondbot /
framework
