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<?php |
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namespace OpenStack\Common\Service; |
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use GuzzleHttp\Client; |
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use GuzzleHttp\ClientInterface; |
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use GuzzleHttp\Middleware as GuzzleMiddleware; |
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use OpenStack\Common\Auth\ServiceUrlResolver; |
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use OpenStack\Common\Auth\Token; |
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use OpenStack\Common\Transport\HandlerStack; |
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use OpenStack\Common\Transport\Middleware; |
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use OpenStack\Common\Transport\Utils; |
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use OpenStack\Identity\v3\Service; |
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/** |
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* A Builder for easily creating OpenStack services. |
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* |
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* @package OpenStack\Common\Service |
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*/ |
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class Builder |
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{ |
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/** |
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* Global options that will be applied to every service created by this builder. |
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* |
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* @var array |
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*/ |
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private $globalOptions = []; |
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/** |
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* Defaults that will be applied to options if no values are provided by the user. |
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* |
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* @var array |
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*/ |
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private $defaults = ['urlType' => 'publicURL']; |
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/** |
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* @param array $globalOptions Options that will be applied to every service created by this builder. |
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* Eventually they will be merged (and if necessary overridden) by the |
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* service-specific options passed in. |
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*/ |
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public function __construct(array $globalOptions = []) |
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{ |
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$this->globalOptions = $globalOptions; |
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} |
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/** |
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* Internal method which resolves the API and Service classes for a service. |
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* |
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* @param string $serviceName The name of the service, e.g. Compute |
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* @param int $serviceVersion The major version of the service, e.g. 2 |
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* |
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* @return array |
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*/ |
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private function getClasses($serviceName, $serviceVersion) |
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{ |
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$rootNamespace = sprintf("OpenStack\\%s\\v%d", $serviceName, $serviceVersion); |
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return [ |
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sprintf("%s\\Api", $rootNamespace), |
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sprintf("%s\\Service", $rootNamespace), |
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]; |
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} |
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/** |
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* This method will return an OpenStack service ready fully built and ready for use. There is |
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* some initial setup that may prohibit users from directly instantiating the service class |
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* directly - this setup includes the configuration of the HTTP client's base URL, and the |
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* attachment of an authentication handler. |
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* |
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* @param $serviceName The name of the service as it appears in the OpenStack\* namespace |
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* @param $serviceVersion The major version of the service |
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* @param array $serviceOptions The service-specific options to use |
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* |
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* @return \OpenStack\Common\Service\ServiceInterface |
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* |
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* @throws \Exception |
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*/ |
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public function createService($serviceName, $serviceVersion, array $serviceOptions = []) |
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{ |
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$options = $this->mergeOptions($serviceOptions); |
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$this->stockIdentityService($options); |
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$this->stockAuthHandler($options); |
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$this->stockHttpClient($options, $serviceName); |
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list($apiClass, $serviceClass) = $this->getClasses($serviceName, $serviceVersion); |
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return new $serviceClass($options['httpClient'], new $apiClass()); |
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} |
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private function stockHttpClient(array &$options, $serviceName) |
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{ |
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if (!isset($options['httpClient']) || !($options['httpClient'] instanceof ClientInterface)) { |
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if (strcasecmp($serviceName, 'identity') === 0) { |
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$baseUrl = $options['authUrl']; |
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$stack = $this->getStack($options['authHandler']); |
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} else { |
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list($token, $baseUrl) = $options['identityService']->authenticate($options); |
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$stack = $this->getStack($options['authHandler'], $token); |
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} |
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$this->addDebugMiddleware($options, $stack); |
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$options['httpClient'] = $this->httpClient($baseUrl, $stack); |
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} |
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} |
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/** |
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* @codeCoverageIgnore |
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*/ |
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private function addDebugMiddleware(array $options, HandlerStack &$stack) |
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{ |
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if (!empty($options['debugLog']) |
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&& !empty($options['logger']) |
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&& !empty($options['messageFormatter']) |
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) { |
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$stack->push(GuzzleMiddleware::log($options['logger'], $options['messageFormatter'])); |
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} |
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} |
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private function stockIdentityService(array &$options) |
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{ |
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if (!isset($options['identityService'])) { |
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$httpClient = $this->httpClient($options['authUrl'], HandlerStack::create()); |
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$options['identityService'] = Service::factory($httpClient); |
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} |
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} |
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/** |
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* @param array $options |
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* @codeCoverageIgnore |
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*/ |
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private function stockAuthHandler(array &$options) |
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{ |
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if (!isset($options['authHandler'])) { |
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$options['authHandler'] = function () use ($options) { |
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return $options['identityService']->generateToken($options); |
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}; |
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} |
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} |
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private function getStack(callable $authHandler, Token $token = null) |
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{ |
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$stack = HandlerStack::create(); |
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$stack->push(Middleware::authHandler($authHandler, $token)); |
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return $stack; |
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} |
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private function httpClient($baseUrl, HandlerStack $stack) |
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{ |
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return new Client([ |
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'base_uri' => Utils::normalizeUrl($baseUrl), |
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'handler' => $stack, |
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]); |
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} |
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private function mergeOptions(array $serviceOptions) |
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{ |
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$options = array_merge($this->defaults, $this->globalOptions, $serviceOptions); |
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if (!isset($options['authUrl'])) { |
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throw new \InvalidArgumentException('"authUrl" is a required option'); |
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} |
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return $options; |
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} |
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} |
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php-opencloud /
openstack
