EventStore\EventStore

Complexity

Total Complexity

30

Size/Duplication

Total Lines	335
Duplicated Lines	0 %

Coupling/Cohesion

Components	1
Dependencies	16

Test Coverage

Coverage

98.5%

Importance

Changes	33
Bugs	3	Features	7

19 Methods

Rating	Name	Duplication	Size	Complexity
A	__construct()	0	8	2
A	deleteStream()	0	10	2
A	getLastResponse()	0	4	1
A	navigateStreamFeed()	0	10	2
A	openStreamFeed()	0	6	1
A	readEvent()	0	11	1
A	readEventBatch()	0	22	1
A	createEventFromResponseContent()	0	9	2
B	writeToStream()	0	24	3
A	forwardStreamFeedIterator()	0	4	1
A	backwardStreamFeedIterator()	0	4	1
A	checkConnection()	0	9	2
A	getStreamUrl()	0	4	1
A	readStreamFeed()	0	20	3
A	getJsonRequest()	0	10	1
A	sendRequest()	0	8	2
A	ensureStatusCodeIsGood()	0	8	2
A	lastResponseAsJson()	0	4	1
B	initBadCodeHandlers()	0	31	1

<?php
namespace EventStore;

use EventStore\Exception\ConnectionFailedException;
use EventStore\Exception\StreamDeletedException;
use EventStore\Exception\StreamNotFoundException;
use EventStore\Exception\UnauthorizedException;
use EventStore\Exception\WrongExpectedVersionException;
use EventStore\Http\Exception\ClientException;
use EventStore\Http\Exception\RequestException;
use EventStore\Http\GuzzleHttpClient;
use EventStore\Http\HttpClientInterface;
use EventStore\Http\ResponseCode;
use EventStore\StreamFeed\EntryEmbedMode;
use EventStore\StreamFeed\Event;
use EventStore\StreamFeed\LinkRelation;
use EventStore\StreamFeed\StreamFeed;
use EventStore\StreamFeed\StreamFeedIterator;
use GuzzleHttp\Psr7\Request;
use GuzzleHttp\Psr7\Uri;
use Psr\Http\Message\RequestInterface;
use Psr\Http\Message\ResponseInterface;

/**
 * Class EventStore
 * @package EventStore
 */
final class EventStore implements EventStoreInterface
{
    /**
     * @var string
     */
    private $url;

    /**
     * @var Client
     */
    private $httpClient;

    /**
     * @var ResponseInterface
     */
    private $lastResponse;

    /**
     * @var array
     */
    private $badCodeHandlers = [];

    /**
     * @param string $url Endpoint of the EventStore HTTP API
     * @param HttpClientInterface the http client
     */
    public function __construct($url, HttpClientInterface $httpClient = null)
    {
        $this->url = $url;

        $this->httpClient = $httpClient ?: new GuzzleHttpClient();

It seems like $httpClient ?: new \EventStore\Http\GuzzleHttpClient() of type object<EventStore\Http\HttpClientInterface> is incompatible with the declared type object<EventStore\Client> of property $httpClient.

        $this->checkConnection();
        $this->initBadCodeHandlers();
    }

    /**
     * Delete a stream
     *
     * @param string         $streamName Name of the stream
     * @param StreamDeletion $mode       Deletion mode (soft or hard)
     */
    public function deleteStream($streamName, StreamDeletion $mode)
    {
        $request = new Request('DELETE', $this->getStreamUrl($streamName));

        if ($mode == StreamDeletion::HARD) {
            $request = $request->withHeader('ES-HardDelete', 'true');
        }

        $this->sendRequest($request);
    }

    /**
     * Get the response from the last HTTP call to the EventStore API
     *
     * @return ResponseInterface
     */
    public function getLastResponse()
    {
        return $this->lastResponse;
    }

    /**
     * Navigate stream feed through link relations
     *
     * @param  StreamFeed      $streamFeed The stream feed to navigate through
     * @param  LinkRelation    $relation   The "direction" expressed as link relation
     * @return null|StreamFeed
     */
    public function navigateStreamFeed(StreamFeed $streamFeed, LinkRelation $relation)
    {
        $url = $streamFeed->getLinkUrl($relation);

        if (empty($url)) {
            return null;
        }

        return $this->readStreamFeed($url, $streamFeed->getEntryEmbedMode());
    }

    /**
     * Open a stream feed for read and navigation
     *
     * @param  string         $streamName The stream name
     * @param  EntryEmbedMode $embedMode  The event entries embed mode (none, rich or body)
     * @return StreamFeed
     */
    public function openStreamFeed($streamName, EntryEmbedMode $embedMode = null)
    {
        $url = $this->getStreamUrl($streamName);

        return $this->readStreamFeed($url, $embedMode);
    }

    /**
     * Read a single event
     *
     * @param  string $eventUrl The url of the event
     * @return Event
     */
    public function readEvent($eventUrl)
    {
        $request = $this->getJsonRequest($eventUrl);
        $this->sendRequest($request);

        $this->ensureStatusCodeIsGood($eventUrl);

        $jsonResponse = $this->lastResponseAsJson();

        return $this->createEventFromResponseContent($jsonResponse['content']);
    }

    /**
     * Read a single event
     *
     * @param  string $eventUrl The url of the event

There is no parameter named $eventUrl. Did you maybe mean $eventUrls?

     * @return Event
     */
    public function readEventBatch(array $eventUrls)
    {
        $requests = array_map(
            function ($eventUrl) {
                return $this->getJsonRequest($eventUrl);
            },
            $eventUrls
        );

        $responses = $this->httpClient->sendRequestBatch($requests);

        return array_map(
            function ($response) {
                return $this
                    ->createEventFromResponseContent(
                        json_decode($response->getBody(), true)['content']
                    )
                ;
            },
            $responses
        );
    }

    /**
     * @param  array $content
     * @return Event
     */
    protected function createEventFromResponseContent(array $content)
    {
        $type = $content['eventType'];
        $version = (integer) $content['eventNumber'];
        $data = $content['data'];
        $metadata = (!empty($content['metadata'])) ? $content['metadata'] : null;

        return new Event($type, $version, $data, $metadata);
    }

    /**
     * Write one or more events to a stream
     *
     * @param  string                                  $streamName      The stream name
     * @param  WritableToStream                        $events          Single event or a collection of events
     * @param  int                                     $expectedVersion The expected version of the stream
     * @throws Exception\WrongExpectedVersionException
     */
    public function writeToStream($streamName, WritableToStream $events, $expectedVersion = ExpectedVersion::ANY)
    {
        if ($events instanceof WritableEvent) {
            $events = new WritableEventCollection([$events]);
        }

        $request = new Request(
            'POST',
            $this->getStreamUrl($streamName),
            [
                'ES-ExpectedVersion' => intval($expectedVersion),
                'Content-Type' => 'application/vnd.eventstore.events+json',
            ],
            json_encode($events->toStreamData())
        );

        $this->sendRequest($request);

        $responseStatusCode = $this->getLastResponse()->getStatusCode();

        if (ResponseCode::HTTP_BAD_REQUEST == $responseStatusCode) {
            throw new WrongExpectedVersionException();
        }
    }

    /**
     * @param  string             $streamName
     * @return StreamFeedIterator
     */
    public function forwardStreamFeedIterator($streamName)
    {
        return StreamFeedIterator::forward($this, $streamName);
    }

    /**
     * @param  string             $streamName
     * @return StreamFeedIterator
     */
    public function backwardStreamFeedIterator($streamName)
    {
        return StreamFeedIterator::backward($this, $streamName);
    }

    /**
     * @throws Exception\ConnectionFailedException
     */
    private function checkConnection()
    {
        try {
            $request = new Request('GET', $this->url);
            $this->sendRequest($request);
        } catch (RequestException $e) {
            throw new ConnectionFailedException($e->getMessage());
        }
    }

    /**
     * @param  string $streamName
     * @return string
     */
    private function getStreamUrl($streamName)
    {
        return sprintf('%s/streams/%s', $this->url, $streamName);
    }

    /**
     * @param  string                            $streamUrl
     * @param  EntryEmbedMode                    $embedMode
     * @return StreamFeed
     * @throws Exception\StreamDeletedException
     * @throws Exception\StreamNotFoundException
     */
    private function readStreamFeed($streamUrl, EntryEmbedMode $embedMode = null)
    {
        $request = $this->getJsonRequest($streamUrl);

        if ($embedMode != null && $embedMode != EntryEmbedMode::NONE()) {
            $uri = Uri::withQueryValue(
                $request->getUri(),
                'embed',
                $embedMode->toNative()
            );

            $request = $request->withUri($uri);
        }

        $this->sendRequest($request);

        $this->ensureStatusCodeIsGood($streamUrl);

        return new StreamFeed($this->lastResponseAsJson(), $embedMode);
    }

    /**
     * @param  string                                       $uri
     * @return \GuzzleHttp\Message\Request|RequestInterface
     */
    private function getJsonRequest($uri)
    {
        return new Request(
            'GET',
            $uri,
            [
                'Accept' => 'application/vnd.eventstore.atom+json'
            ]
        );
    }

    /**
     * @param RequestInterface $request
     */
    private function sendRequest(RequestInterface $request)
    {
        try {
            $this->lastResponse = $this->httpClient->send($request);
        } catch (ClientException $e) {
            $this->lastResponse = $e->getResponse();
        }
    }

    /**
     * @param  string                            $streamUrl
     * @throws Exception\StreamDeletedException
     * @throws Exception\StreamNotFoundException
     * @throws Exception\UnauthorizedException
     */
    private function ensureStatusCodeIsGood($streamUrl)
    {
        $code = $this->lastResponse->getStatusCode();

        if (array_key_exists($code, $this->badCodeHandlers)) {
            $this->badCodeHandlers[$code]($streamUrl);
        }
    }

    private function initBadCodeHandlers()
    {
        $this->badCodeHandlers = [
            ResponseCode::HTTP_NOT_FOUND => function ($streamUrl) {
                throw new StreamNotFoundException(
                        sprintf(
                            'No stream found at %s',
                            $streamUrl
                        )
                    );
            },

            ResponseCode::HTTP_GONE => function ($streamUrl) {
                throw new StreamDeletedException(
                        sprintf(
                            'Stream at %s has been permanently deleted',
                            $streamUrl
                        )
                    );
            },

            ResponseCode::HTTP_UNAUTHORIZED => function ($streamUrl) {
                throw new UnauthorizedException(
                        sprintf(
                            'Tried to open stream %s got 401',
                            $streamUrl
                        )
                    );
            }
        ];
    }

    private function lastResponseAsJson()
    {
        return json_decode($this->lastResponse->getBody(), true);
    }
}