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<?php |
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namespace Saltwater\App\Provider; |
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use Saltwater\Bus\Water\Chain; |
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use Saltwater\Salt\Provider; |
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use Saltwater\Server as S; |
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use Saltwater\Utils as U; |
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use Saltwater\Salt\Service; |
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use Saltwater\Salt\Context; |
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class ServiceChain extends Provider |
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{ |
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private $chain; |
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public function __construct() |
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{ |
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$this->chain = new Chain(); |
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} |
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public function resolve($input, $result = null) |
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{ |
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$length = count($this->chain); |
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$service = new Service; |
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for ($i = 0; $i < $length; ++$i) { |
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$result = $this->chain( |
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$service, $this->chain[$i], $input, $result, ($i == $length - 1) |
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); |
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} |
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return $result; |
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} |
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/** |
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* @param Service $service |
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* @param object $item |
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* @param mixed $input |
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* @param mixed $result |
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* @param bool $last |
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* |
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* @return mixed|null |
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*/ |
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private function chain(&$service, &$item, $input, $result, $last) |
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{ |
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$item->context->pushData($result); |
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$service->setContext($item->context); |
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if (!$service->prepareCall($item)) { |
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$service = S::$n->service->get($item->service, $item->context); |
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} |
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return $service->call($item, $last ? $input : null); |
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} |
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/** |
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* @param Context $context |
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* @param string $cmd |
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* @param array $path |
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*/ |
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protected function explode($context, $cmd, $path) |
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{ |
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$root = array_shift($path); |
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// This is for simple commands upon an established service |
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if (empty($path) && !empty($this->chain)) { |
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$this->push($context, $cmd, $root); |
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return; |
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} |
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if ($c = S::$n->context->get($root, $context)) { |
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$context = $c; |
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$root = array_shift($path); |
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} |
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$this->explodePush($path, $context, $cmd, $root); |
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} |
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/** |
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* @param Context $context |
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* @param string $cmd |
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*/ |
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private function explodePush($path, $context, $cmd, $root) |
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{ |
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$next = array_shift($path); |
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// Either push a call on the last service or a new one into the chain |
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if (empty($path)) { |
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$this->push($context, $cmd, $root, $next); |
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} else { |
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$this->push($context, 'get', $root, $next); |
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// We have leftovers! |
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$this->explode($context, $cmd, $path); |
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} |
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} |
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/** |
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* @param Context $context |
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* @param string $cmd |
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* @param string $service |
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* @param string $path |
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*/ |
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protected function push($context, $cmd, $service, $path = null) |
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{ |
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$method = $service; |
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if (!empty($path) && !is_numeric($path)) { |
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$method = $path; |
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$path = null; |
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} |
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$this->chain[] = (object) array( |
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'context' => $context, |
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'http' => $cmd, |
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'service' => $service, |
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'method' => $method, |
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'function' => $cmd . U::dashedToCamelCase($method), |
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'path' => $path |
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); |
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} |
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} |
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daviddeutsch /
saltwater
