Automattic/php-push

<?php
declare( strict_types = 1 );

class APNSClient {

    /** @var APNSNetworkService **/
    private $network_service;

    /** @var APNSConfiguration */
    private $configuration;

    public function __construct( APNSConfiguration $configuration, ?APNSNetworkService $network_service = null ) {
        $this->configuration   = $configuration;
        $this->network_service = $network_service ?? new APNSNetworkService();
    }

    public static function with_configuration( APNSConfiguration $configuration, ?APNSNetworkService $network_service = null ): self {
        return new APNSClient( $configuration, $network_service );
    }

    public function set_port_number( int $port ): self {
        $this->network_service->set_port( $port );
        return $this;
    }

    /**
     * @param APNSRequest[] $requests
     *
     * @return APNSResponse[]
     */
    public function send_requests( array $requests ): array {
        foreach ( $requests as $request ) {
            assert( get_class( $request ) === APNSRequest::class );

            $url     = $request->get_url_for_configuration( $this->configuration );
            $headers = $request->get_headers_for_configuration( $this->configuration );
            $this->network_service->enqueue_request( $url, $this->convert_request_headers( $headers ), $request->get_body(), $request->get_userdata() );
        }

        return $this->network_service->send_queued_requests();
    }

    public function close(): self {
        $this->network_service->close_connection();
        return $this;
    }

    public function set_debug( bool $debug ): self {
        $this->network_service->set_debug( $debug );
        return $this;
    }

    public function set_certificate_bundle_path( string $path ): self {
        $this->network_service->set_certificate_bundle_path( $path );
        return $this;
    }

    /**
     *
     * @param array $headers
     * @psalm-param array<string, string> $headers
     *
     * @return string[]
     */
    private function convert_request_headers( array $headers ): array {
        $_headers = [];
        foreach ( $headers as $key => $value ) {
            $_headers[] = $key . ': ' . $value;
        }
        return $_headers;
    }
}