<?php
namespace Grpc;

require_once realpath(dirname(__FILE__) . '/../autoload.php');

/**
 * Represents an active call that sends a single message and then gets a stream
 * of reponses
 */
class ServerStreamingSurfaceActiveCall extends AbstractSurfaceActiveCall {
  /**
   * Create a new simple (single request/single response) active call.
   * @param Channel $channel The channel to communicate on
   * @param string $method The method to call on the remote server
   * @param callable $deserialize The function to deserialize a value
   * @param $arg The argument to send
   * @param array $metadata Metadata to send with the call, if applicable
   */
  public function __construct(Channel $channel,
                              $method,
                              callable $deserialize,
                              $arg,
                              $metadata = array()) {
    parent::__construct($channel, $method, $deserialize, $metadata,
                        \Grpc\WRITE_BUFFER_HINT);
    $this->_write($arg);
    $this->_writesDone();
  }

  /**
   * @return An iterator of response values
   */
  public function responses() {
    while(($response = $this->_read()) !== null) {
      yield $response;
    }
  }

  public function getStatus() {
    return $this->_getStatus();
  }
}
