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<?php |
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namespace Innmind\RestBundle\Client\Server; |
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use Innmind\RestBundle\Exception\CapabilitiesException; |
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use Innmind\Rest\Client\Definition\Loader; |
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use Innmind\UrlResolver\ResolverInterface; |
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use GuzzleHttp\Client as Http; |
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use GuzzleHttp\Message\Response; |
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class Capabilities |
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{ |
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protected $host; |
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protected $http; |
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protected $cache; |
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protected $loader; |
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protected $resolver; |
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public function __construct( |
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$host, |
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Http $http, |
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CacheInterface $cache, |
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Loader $loader, |
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ResolverInterface $resolver |
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) { |
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$this->host = (string) $host; |
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$this->http = $http; |
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$this->cache = $cache; |
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$this->loader = $loader; |
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$this->resolver = $resolver; |
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} |
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/** |
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* Return the definition for the given resource name |
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* |
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* @param string $name |
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* |
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* @return \Innmind\Rest\Client\Definition\ResourceDefinition |
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*/ |
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public function get($name) |
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{ |
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if ($this->cache->has($name)) { |
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return $this->loader->load($this->cache->get($name)); |
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} |
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if (!$this->cache->isFresh()) { |
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$this->refresh(); |
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return $this->get($name); |
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} |
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throw new \InvalidArgumentException(sprintf( |
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'Unknown resource named "%s" for the host "%s"', |
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$name, |
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$this->host |
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)); |
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} |
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/** |
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* Return all the resource names |
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* |
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* @return array |
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*/ |
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public function keys() |
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{ |
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$names = $this->cache->keys(); |
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if (empty($names) && !$this->cache->isFresh()) { |
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$this->refresh(); |
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return $this->keys(); |
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} |
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return $names; |
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} |
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/** |
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* Reload all the resource names available for the server |
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* |
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* @return Capabilities self |
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*/ |
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public function refresh() |
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{ |
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$url = $this->resolver->resolve($this->host, '/*'); |
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$response = $this->http->options( |
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$url, |
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[ |
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'headers' => [ |
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'Accept' => 'application/json', |
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], |
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] |
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); |
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if ( |
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$response->getStatusCode() !== 200 || |
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!$response->hasHeader('Link') |
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) { |
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throw new CapabilitiesException(sprintf( |
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'Couldn\'t retrieve "%s" capabilities', |
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$this->host |
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)); |
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} |
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foreach ($this->cache->keys() as $key) { |
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$this->cache->remove($key); |
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} |
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$links = Response::parseHeader($response, 'Link'); |
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foreach ($links as $link) { |
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if (isset($link['rel']) && $link['rel'] === 'endpoint') { |
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$url = $this->resolver->resolve( |
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$this->host, |
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substr($link[0], 1, -1) |
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); |
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$this->cache->save($link['name'], $url); |
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} |
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} |
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return $this; |
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} |
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} |
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Innmind /
RestBundle
