Scriptotek\Alma\Client

Complexity

Total Complexity

44

Size/Duplication

Total Lines	476
Duplicated Lines	5.46 %

Coupling/Cohesion

Components	2
Dependencies	26

Importance

Changes

0

20 Methods

Rating	Name	Duplication	Size	Complexity
B	__construct()	0	40	6
A	lendingRequests()	0	4	1
A	setSruClient()	0	4	1
A	assertHasSruClient()	0	6	2
A	setKey()	0	6	1
A	setRegion()	0	9	2
A	buildUrl()	0	18	3
B	request()	0	42	7
A	get()	0	11	1
A	getJSON()	0	6	1
A	getXML()	0	6	1
A	put()	13	13	2
A	putJSON()	0	6	1
A	putXML()	0	6	1
A	post()	13	13	2
A	postJSON()	0	6	1
A	postXML()	0	6	1
A	getRedirectLocation()	0	16	3
A	make()	0	4	1
B	parseClientError()	0	40	6

<?php

namespace Scriptotek\Alma;

use Danmichaelo\QuiteSimpleXMLElement\QuiteSimpleXMLElement;
use Http\Client\Common\Plugin\ContentLengthPlugin;
use Http\Client\Common\Plugin\ErrorPlugin;
use Http\Client\Common\PluginClient;
use Http\Client\Exception\HttpException;
use Http\Client\Exception\NetworkException;
use Http\Client\HttpClient;
use Http\Discovery\HttpClientDiscovery;
use Http\Discovery\MessageFactoryDiscovery;
use Http\Discovery\UriFactoryDiscovery;
use Http\Message\MessageFactory;
use Http\Message\UriFactory;
use Psr\Http\Message\RequestInterface;
use Psr\Http\Message\ResponseInterface;
use Psr\Http\Message\UriInterface;
use Scriptotek\Alma\Analytics\Analytics;
use Scriptotek\Alma\Bibs\Bibs;
use Scriptotek\Alma\Bibs\Items;
use Scriptotek\Alma\Conf\Conf;
use Scriptotek\Alma\Conf\Libraries;
use Scriptotek\Alma\Conf\Library;
use Scriptotek\Alma\Exception\ClientException as AlmaClientException;
use Scriptotek\Alma\Exception\InvalidApiKey;
use Scriptotek\Alma\Exception\MaxNumberOfAttemptsExhausted;
use Scriptotek\Alma\Exception\RequestFailed;
use Scriptotek\Alma\Exception\ResourceNotFound;
use Scriptotek\Alma\Exception\SruClientNotSetException;
use Scriptotek\Alma\TaskLists\LendingRequests;
use Scriptotek\Alma\TaskLists\TaskLists;
use Scriptotek\Alma\Users\Users;
use Scriptotek\Sru\Client as SruClient;

/**
 * Alma client.
 */
class Client
{
    public $baseUrl;

    /** @var string Alma zone (institution or network) */
    public $zone;

    /** @var string Alma Developers Network API key for this zone */
    public $key;

    /** @var Client Network zone instance */
    public $nz;

    /** @var HttpClient */
    protected $http;

    /** @var MessageFactory */
    protected $messageFactory;

    /** @var UriFactory */
    protected $uriFactory;

    /** @var SruClient */
    public $sru;

    /** @var Bibs */
    public $bibs;

    /** @var Analytics */
    public $analytics;

    /** @var Users */
    public $users;

    /** @var Items */
    public $items;

    /** @var int Max number of retries if we get 429 errors */
    public $maxAttempts = 10;

    /** @var float Number of seconds to sleep before retrying */
    public $sleepTimeOnRetry = 0.5;

    /**
     * Create a new client to connect to a given Alma instance.
     *
     * @param string         $key            API key
     * @param string         $region         Hosted region code, used to build base URL
     * @param string         $zone           Alma zone (Either Zones::INSTITUTION or Zones::NETWORK)
     * @param HttpClient     $http
     * @param MessageFactory $messageFactory
     * @param UriFactory     $uriFactory
     *
     * @throws \ErrorException
     */
    public function __construct(
        $key = null,
        $region = 'eu',
        $zone = Zones::INSTITUTION,
        HttpClient $http = null,
        MessageFactory $messageFactory = null,
        UriFactory $uriFactory = null
    ) {
        $this->http = new PluginClient(
            $http ?: HttpClientDiscovery::find(),
            [
                new ContentLengthPlugin(),
                new ErrorPlugin(),
            ]
        );
        $this->messageFactory = $messageFactory ?: MessageFactoryDiscovery::find();
        $this->uriFactory = $uriFactory ?: UriFactoryDiscovery::find();

        $this->key = $key;
        $this->setRegion($region);

        $this->zone = $zone;

        $this->bibs = new Bibs($this);
        $this->items = new Items($this); // Only needed for the fromBarcode method :/

        $this->analytics = new Analytics($this);
        $this->users = new Users($this);

        $this->conf = new Conf($this);

The property conf does not exist. Did you maybe forget to declare it?

        $this->libraries = $this->conf->libraries;  // shortcut

The property libraries does not exist. Did you maybe forget to declare it?

The property libraries does not seem to exist in Scriptotek\Alma\Conf\Conf.

        $this->taskLists = new TaskLists($this);

The property taskLists does not exist. Did you maybe forget to declare it?

        if ($zone == Zones::INSTITUTION) {
            $this->nz = new self(null, $region, Zones::NETWORK, $this->http, $this->messageFactory, $this->uriFactory);
        } elseif ($zone != Zones::NETWORK) {
            throw new AlmaClientException('Invalid zone name.');
        }
    }

    public function lendingRequests(Library $library, $params = [])
    {
        return new LendingRequests($this, $library, $params);
    }

    /**
     * Attach an SRU client (so you can search for Bib records).
     *
     * @param SruClient $sru
     */
    public function setSruClient(SruClient $sru)
    {
        $this->sru = $sru;
    }

    /**
     * Assert that an SRU client is connected. Throws SruClientNotSetException if not.
     *
     * @throws SruClientNotSetException
     */
    public function assertHasSruClient()
    {
        if (!isset($this->sru)) {
            throw new SruClientNotSetException();
        }
    }

    /**
     * Set the API key for this Alma instance.
     *
     * @param string $key The API key
     *
     * @return $this
     */
    public function setKey($key)
    {
        $this->key = $key;

        return $this;
    }

    /**
     * Set the Alma region code ('na' for North America, 'eu' for Europe, 'ap' for Asia Pacific).
     *
     * @param $regionCode
     *
     * @throws \ErrorException
     *
     * @return $this
     */
    public function setRegion($regionCode)
    {
        if (!in_array($regionCode, ['na', 'eu', 'ap'])) {
            throw new AlmaClientException('Invalid region code');
        }
        $this->baseUrl = 'https://api-' . $regionCode . '.hosted.exlibrisgroup.com/almaws/v1';

        return $this;
    }

    /**
     * Extend an URL with query string parameters and return an UriInterface object.
     *
     * @param string $url
     * @param array $query
     *
     * @return UriInterface
     */
    protected function buildUrl($url, $query = [])
    {
        $url = explode('?', $url, 2);
        if (count($url) == 2) {
            parse_str($url[1], $query0);
            $query = array_merge($query0, $query);
        }
        $query['apikey'] = $this->key;

        $url = $url[0];

        if (strpos($url, $this->baseUrl) === false) {
            $url = $this->baseUrl . $url;
        }

        return $this->uriFactory->createUri($url)
            ->withQuery(http_build_query($query));
    }

    /**
     * Make a synchronous HTTP request and return a PSR7 response if successful.
     * In the case of intermittent errors (connection problem, 429 or 5XX error), the request is
     * attempted a maximum of {$this->maxAttempts} times with a sleep of {$this->sleepTimeOnRetry}
     * between each attempt to avoid hammering the server.
     *
     * @param RequestInterface $request
     * @param int              $attempt
     *
     * @return ResponseInterface
     */
    public function request(RequestInterface $request, $attempt = 1)
    {
        if (!$this->key) {
            throw new AlmaClientException('No API key defined for ' . $this->zone);
        }

        try {
            return $this->http->sendRequest($request);
        } catch (HttpException $e) {
            // Thrown for 400 and 500 level errors.
            $error = $this->parseClientError($e);

            if ($error->getErrorCode() === 'PER_SECOND_THRESHOLD') {
                // We've run into the "Max 25 API calls per institution per second" limit.
                // Wait a sec and retry, unless we've tried too many times already.
                if ($attempt > $this->maxAttempts) {
                    throw new MaxNumberOfAttemptsExhausted(
                        'Rate limiting error - max number of retry attempts exhausted.',
                        0,
                        $e
                    );
                }
                time_nanosleep(0, $this->sleepTimeOnRetry * 1000000000);
                return $this->request($request, $attempt + 1);
            }

            // Throw exception for other errors
            throw $error;
        } catch (NetworkException $e) {
            // Thrown in case of a networking error
            // Wait a sec and retry, unless we've tried too many times already.
            if ($attempt > $this->maxAttempts) {
                throw new MaxNumberOfAttemptsExhausted(
                    'Network error - max number of retry attempts exhausted.',
                    0,
                    $e
                );
            }
            time_nanosleep(0, $this->sleepTimeOnRetry * 1000000000);
            return $this->request($request, $attempt + 1);
        }
    }

    /**
     * Make a GET request.
     *
     * @param string $url
     * @param array  $query
     * @param string $contentType
     *
     * @return string The response body
     */
    public function get($url, $query = [], $contentType = 'application/json')
    {
        $url = $this->buildUrl($url, $query);
        $headers = [
            'Accept' => $contentType,
        ];
        $request = $this->messageFactory->createRequest('GET', $url, $headers);
        $response = $this->request($request);

        return strval($response->getBody());
    }

    /**
     * Make a GET request, accepting JSON.
     *
     * @param string $url
     * @param array  $query
     *
     * @return \stdClass JSON response as an object.
     */
    public function getJSON($url, $query = [])
    {
        $responseBody = $this->get($url, $query, 'application/json');

        return json_decode($responseBody);
    }

    /**
     * Make a GET request, accepting XML.
     *
     * @param string $url
     * @param array  $query
     *
     * @return QuiteSimpleXMLElement
     */
    public function getXML($url, $query = [])
    {
        $responseBody = $this->get($url, $query, 'application/xml');

        return new QuiteSimpleXMLElement($responseBody);
    }

    /**
     * Make a PUT request.
     *
     * @param string $url
     * @param $data
     * @param string $contentType
     *
     * @return string The response body
     */
    public function put($url, $data, $contentType = 'application/json')

This method seems to be duplicated in your project.

    {
        $uri = $this->buildUrl($url);
        $headers = [];
        if (!is_null($contentType)) {
            $headers['Content-Type'] = $contentType;
            $headers['Accept'] = $contentType;
        }
        $request = $this->messageFactory->createRequest('PUT', $uri, $headers, $data);
        $response = $this->request($request);

        return strval($response->getBody());
    }

    /**
     * Make a PUT request, sending JSON data.
     *
     * @param string $url
     * @param $data
     *
     * @return \stdClass
     */
    public function putJSON($url, $data)
    {
        $responseBody = $this->put($url, json_encode($data), 'application/json');

        return json_decode($responseBody);
    }

    /**
     * Make a PUT request, sending XML data.
     *
     * @param string $url
     * @param $data
     *
     * @return QuiteSimpleXMLElement
     */
    public function putXML($url, $data)
    {
        $responseBody = $this->put($url, $data, 'application/xml');

        return new QuiteSimpleXMLElement($responseBody);
    }

    /**
     * Make a POST request.
     *
     * @param string $url
     * @param $data
     * @param string $contentType
     *
     * @return string The response body
     */
    public function post($url, $data, $contentType = 'application/json')

This method seems to be duplicated in your project.

    {
        $uri = $this->buildUrl($url);
        $headers = [];
        if (!is_null($contentType)) {
            $headers['Content-Type'] = $contentType;
            $headers['Accept'] = $contentType;
        }
        $request = $this->messageFactory->createRequest('POST', $uri, $headers, $data);
        $response = $this->request($request);

        return strval($response->getBody());
    }

    /**
     * Make a POST request, sending JSON data.
     *
     * @param string $url
     * @param $data
     *
     * @return \stdClass
     */
    public function postJSON($url, $data = null)
    {
        $responseBody = $this->post($url, json_encode($data), 'application/json');

        return json_decode($responseBody);
    }

    /**
     * Make a POST request, sending XML data.
     *
     * @param string $url
     * @param $data
     *
     * @return QuiteSimpleXMLElement
     */
    public function postXML($url, $data = null)
    {
        $responseBody = $this->post($url, $data, 'application/xml');

        return new QuiteSimpleXMLElement($responseBody);
    }

    /**
     * Get the redirect target location of an URL, or null if not a redirect.
     *
     * @param string $url
     * @param array  $query
     *
     * @return string|null
     */
    public function getRedirectLocation($url, $query = [])
    {
        $url = $this->buildUrl($url, $query);

        $request = $this->messageFactory->createRequest('GET', $url);

        try {
            $response = $this->request($request);
        } catch (ResourceNotFound $e) {
            return;
        }

        $locations = $response->getHeader('Location');

        return count($locations) ? $locations[0] : null;
    }

    /**
     * @param class $className
     * @param array ...$params
     * @return mixed
     */
    public function make($className, ...$params)
    {
        return new $className($this, ...$params);
    }

    /**
     * Generate a client exception.
     *
     * @param HttpException $exception
     * @return RequestFailed
     */
    protected function parseClientError(HttpException $exception)
    {
        $contentType = explode(';', $exception->getResponse()->getHeaderLine('Content-Type'))[0];
        $responseBody = (string) $exception->getResponse()->getBody();

        switch ($contentType) {
            case 'application/json':
                $res = json_decode($responseBody, true);
                $err = $res['errorList']['error'][0];
                $message = $err['errorMessage'];
                $code = $err['errorCode'];
                break;

            case 'application/xml':
                $xml = new QuiteSimpleXMLElement($responseBody);
                $xml->registerXPathNamespace('xb', 'http://com/exlibris/urm/general/xmlbeans');

                $message = $xml->text('//xb:errorMessage');
                $code = $xml->text('//xb:errorCode');
                break;

            default:
                $message = $responseBody;
                $code = '';
        }

        // The error code is often an integer, but sometimes a string,
        // so we generalize it as a string.
        $code = empty($code) ? null : (string) $code;

        if (strtolower($message) == 'invalid api key') {
            return new InvalidApiKey($message, null, $exception);
        }

        if (preg_match('/(no items?|not) found/i', $message)) {
            return new ResourceNotFound($message, $code, $exception);
        }

        return new RequestFailed($message, $code, $exception);
    }
}