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<?php |
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/** |
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* This file is part of the bitbucket-api package. |
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* |
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* (c) Alexandru G. <[email protected]> |
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* |
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* For the full copyright and license information, please view the LICENSE |
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* file that was distributed with this source code. |
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*/ |
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namespace Bitbucket\API\Http\Plugin; |
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use Http\Client\Common\Plugin; |
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use Http\Discovery\MessageFactoryDiscovery; |
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use Http\Message\ResponseFactory; |
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use Psr\Http\Message\RequestInterface; |
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use Psr\Http\Message\ResponseInterface; |
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/** |
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* Helper for `Pager` |
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* |
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* Inserts pagination metadata (_as is expected by `Pager`_), |
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* in any response coming from v1 of the API which contains |
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* a collection. |
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* |
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* @author Alexandru Guzinschi <[email protected]> |
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*/ |
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class ApiOneCollectionPlugin implements Plugin |
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{ |
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/** @var ResponseFactory */ |
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private $responseFactory; |
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/** @var array */ |
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private $urlQueryComponents; |
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/** @var string */ |
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private $resource; |
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/** @var array */ |
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private $content; |
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public function __construct(ResponseFactory $responseFactory = null) |
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{ |
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$this->responseFactory = $responseFactory ?: MessageFactoryDiscovery::find(); |
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} |
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public function handleRequest(RequestInterface $request, callable $next, callable $first) |
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{ |
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return $next($request)->then(function (ResponseInterface $response) use ($request) { |
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if ($this->isLegacyApiVersion($request)) { |
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$this->parseRequest($request); |
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if ($this->canPaginate($response)) { |
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$content = $this->insertPaginationMeta( |
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$this->getContent($response), |
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$this->getPaginationMeta($response), |
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$request |
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); |
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return $this->responseFactory->createResponse( |
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$response->getStatusCode(), |
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$response->getReasonPhrase(), |
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$response->getHeaders(), |
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json_encode($content), |
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$response->getProtocolVersion() |
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); |
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} |
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return $this->responseFactory->createResponse( |
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$response->getStatusCode(), |
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$response->getReasonPhrase(), |
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$response->getHeaders(), |
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json_encode($this->getContent($response)), |
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$response->getProtocolVersion() |
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); |
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} |
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}); |
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} |
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/** |
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* @access public |
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* @param RequestInterface $request |
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* @return bool |
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*/ |
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private function isLegacyApiVersion(RequestInterface $request) |
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{ |
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/** @var RequestInterface $request */ |
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return strpos($request->getUri()->getPath(), '/1.0/') !== false; |
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} |
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/** |
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* @access public |
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* @param RequestInterface $request |
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* @return void |
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*/ |
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private function parseRequest(RequestInterface $request) |
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{ |
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if ($request->getUri()->getQuery()) { |
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parse_str($request->getUri()->getQuery(), $this->urlQueryComponents); |
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} else { |
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$this->urlQueryComponents = []; |
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} |
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$this->urlQueryComponents['start'] = array_key_exists('start', $this->urlQueryComponents) ? |
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(int)$this->urlQueryComponents['start'] : |
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0 |
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; |
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$this->urlQueryComponents['limit'] = array_key_exists('limit', $this->urlQueryComponents) ? |
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(int)$this->urlQueryComponents['limit'] : |
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15 |
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; |
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$pcs = explode('/', $request->getUri()->getPath()); |
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$this->resource = strtolower(array_pop($pcs)); |
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} |
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/** |
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* @access public |
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* @param ResponseInterface $response |
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* @return bool |
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*/ |
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private function canPaginate(ResponseInterface $response) |
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{ |
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$content = $this->getContent($response); |
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return array_key_exists('count', $content) && array_key_exists($this->resource, $content); |
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} |
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/** |
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* @access private |
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* @param ResponseInterface $response |
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* @return array |
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*/ |
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private function getContent(ResponseInterface $response) |
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{ |
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if (null === $this->content) { |
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$content = json_decode($response->getBody()->getContents(), true); |
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if (is_array($content) && JSON_ERROR_NONE === json_last_error()) { |
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$this->content = $content; |
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} else { |
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$this->content = []; |
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} |
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} |
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return $this->content; |
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} |
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/** |
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* @access private |
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* @param array $content |
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* @param array $pagination |
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* @return array |
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*/ |
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private function insertPaginationMeta(array $content, array $pagination, RequestInterface $request) |
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{ |
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// This is just a reference because duplicate data in response could create confusion between some users. |
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$content['values'] = '.'.$this->resource; |
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$content['size'] = $content['count']; |
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// insert pagination links only if everything does not fit in a single page |
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if ($content['count'] > count($content[$this->resource])) { |
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if ($pagination['page'] > 1 || $pagination['page'] === $pagination['pages']) { |
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$query = $this->urlQueryComponents; |
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$query['start'] -= $this->urlQueryComponents['limit']; |
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$content['previous'] = sprintf( |
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'%s://%s%s?%s', |
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$request->getUri()->getScheme(), |
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$request->getUri()->getHost(), |
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$request->getUri()->getPath(), |
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http_build_query($query) |
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); |
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} |
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if ($pagination['page'] < $pagination['pages']) { |
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$query = $this->urlQueryComponents; |
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$query['start'] += $this->urlQueryComponents['limit']; |
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$content['next'] = sprintf( |
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'%s://%s%s?%s', |
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$request->getUri()->getScheme(), |
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$request->getUri()->getHost(), |
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$request->getUri()->getPath(), |
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http_build_query($query) |
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); |
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} |
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} |
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return $content; |
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} |
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/** |
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* @access private |
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* @param ResponseInterface $response |
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* @return array |
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*/ |
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private function getPaginationMeta(ResponseInterface $response) |
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{ |
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$meta = []; |
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$content = $this->getContent($response); |
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$meta['total'] = $content['count']; |
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$meta['pages'] = (int)ceil($meta['total'] / $this->urlQueryComponents['limit']); |
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$meta['page'] = ($this->urlQueryComponents['start']/$this->urlQueryComponents['limit']) === 0 ? |
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1 : |
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($this->urlQueryComponents['start']/$this->urlQueryComponents['limit'])+1 |
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; |
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if ($meta['page'] > $meta['pages']) { |
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$meta['page'] = $meta['pages']; |
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} |
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return $meta; |
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} |
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} |
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