awsmug/alexa-sdk

<?php

namespace Alexa\Input;
use Alexa\Raw_Object;
use Alexa\Exception;

/**
 * Class Input_Stream
 *
 * @since 1.0.0
 *
 * @package Alexa
 */
class Input_Stream {
    use Raw_Object;

    /**
     * Version
     *
     * @since 1.0.0
     *
     * @var string
     */
    private $version;

    /**
     * Session Data
     *
     * @since 1.0.0
     *
     * @var Session
     */
    private $session;

    /**
     * Context Data
     *
     * @since 1.0.0
     *
     * @var Context
     */
    private $context;

    /**
     * Request Data
     *
     * @since 1.0.0
     *
     * @var Request
     */
    private $request;

    /**
     * Request constructor.
     *
     * @since 1.0.0
     *
     * @param \stdClass $object Input from Alexa JSON String
     */
    public function __construct( \stdClass $object ) {
        $this->object = $object;

        $this->version = $object->version;
    }

    /**
     * Get Version
     *
     * @since 1.0.0
     *
     * @return Session $session
     */
    public function get_version() {
        return $this->version;
    }

    /**
     * Get Session
     *
     * @since 1.0.0
     *
     * @return Session $session
     */
    public function session() {
        if( empty( $this->session ) ) {
            $this->session = new Session( $this->object->session );
        }

        return $this->session;
    }

    /**
     * Is there a context object in request
     *
     * @since 1.0.0
     *
     * @return bool
     */
    public function has_context() {
        if( ! property_exists( $this->object, 'context' ) ){
            return false;
        }

        return true;
    }

    /**
     * Get Context
     *
     * @since 1.0.0
     *
     * @return Context $context
     *
     * @throws Exception
     */
    public function context() {
        if( empty( $this->context ) ) {
            if( ! property_exists( $this->object, 'context' ) ) {
                throw new Exception( 'There is no context data in this request.' );
            }

            $this->context = new Context( $this->object->context );
        }

        return $this->context;
    }

    /**
     * Get Request
     *
     * @since 1.0.0
     *
     * @return Request $request
     */
    public function request() {
        if( empty( $this->request ) ) {
            $this->request = new Request( $this->object->request );
        }

        return $this->request;
    }
}