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<?php
namespace Illuminate\Http\Client;
use Illuminate\Support\Traits\Macroable;
use OutOfBoundsException;
class ResponseSequence
{
use Macroable;
/**
* The responses in the sequence.
*
* @var array
*/
protected $responses;
/**
* Indicates that invoking this sequence when it is empty should throw an exception.
*
* @var bool
*/
protected $failWhenEmpty = true;
/**
* The response that should be returned when the sequence is empty.
*
* @var \GuzzleHttp\Promise\PromiseInterface
*/
protected $emptyResponse;
/**
* Create a new response sequence.
*
* @param array $responses
* @return void
*/
public function __construct(array $responses)
{
$this->responses = $responses;
}
/**
* Push a response to the sequence.
*
* @param string|array|null $body
* @param int $status
* @param array $headers
* @return $this
*/
public function push($body = null, int $status = 200, array $headers = [])
{
return $this->pushResponse(
Factory::response($body, $status, $headers)
);
}
/**
* Push a response with the given status code to the sequence.
*
* @param int $status
* @param array $headers
* @return $this
*/
public function pushStatus(int $status, array $headers = [])
{
return $this->pushResponse(
Factory::response('', $status, $headers)
);
}
/**
* Push response with the contents of a file as the body to the sequence.
*
* @param string $filePath
* @param int $status
* @param array $headers
* @return $this
*/
public function pushFile(string $filePath, int $status = 200, array $headers = [])
{
$string = file_get_contents($filePath);
return $this->pushResponse(
Factory::response($string, $status, $headers)
);
}
/**
* Push a response to the sequence.
*
* @param mixed $response
* @return $this
*/
public function pushResponse($response)
{
$this->responses[] = $response;
return $this;
}
/**
* Make the sequence return a default response when it is empty.
*
* @param \GuzzleHttp\Promise\PromiseInterface|\Closure $response
* @return $this
*/
public function whenEmpty($response)
{
$this->failWhenEmpty = false;
$this->emptyResponse = $response;
return $this;
}
/**
* Make the sequence return a default response when it is empty.
*
* @return $this
*/
public function dontFailWhenEmpty()
{
return $this->whenEmpty(Factory::response());
}
/**
* Indicate that this sequence has depleted all of its responses.
*
* @return bool
*/
public function isEmpty()
{
return count($this->responses) === 0;
}
/**
* Get the next response in the sequence.
*
* @return mixed
*
* @throws \OutOfBoundsException
*/
public function __invoke()
{
if ($this->failWhenEmpty && count($this->responses) === 0) {
throw new OutOfBoundsException('A request was made, but the response sequence is empty.');
}
if (! $this->failWhenEmpty && count($this->responses) === 0) {
return value($this->emptyResponse ?? Factory::response());
}
return array_shift($this->responses);
}
}
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