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                <?php  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * (c) Kitodo. Key to digital objects e.V. <[email protected]>  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 *  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * This file is part of the Kitodo and TYPO3 projects.  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 *  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * @license GNU General Public License version 3 or later.  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * For the full copyright and license information, please read the  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * LICENSE.txt file that was distributed with this source code.  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                namespace Kitodo\Dlf\Api\Viaf;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                use Psr\Http\Message\RequestFactoryInterface;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                use TYPO3\CMS\Core\Http\RequestFactory;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                use TYPO3\CMS\Core\Log\LogManager;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                use TYPO3\CMS\Core\Utility\GeneralUtility;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * VIAF API Client class  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 *  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * @author Beatrycze Volk <[email protected]>  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * @package TYPO3  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * @subpackage dlf  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * @access public  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 **/  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                class ViafClient  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * This holds the logger  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     *  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @var LogManager  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @access protected  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    protected $logger;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * The ORCID API endpoint  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     *  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @var string  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     **/  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    private $endpoint = 'viaf.xml';  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * The VIAF URL of the profile  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     *  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @var string  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     **/  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    private $viafUrl = null;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * The request object  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     *  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @var RequestFactoryInterface  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     **/  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    private $requestFactory = null;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * Constructs a new instance  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     *  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @param string $viafUrl: the VIAF URL of the profile  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @param RequestFactory $requestFactory a request object to inject  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @return void  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     **/  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    public function __construct($viafUrl, RequestFactory $requestFactory)  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $this->logger = GeneralUtility::makeInstance(LogManager::class)->getLogger(static::class);  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $this->viafUrl = $viafUrl;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $this->requestFactory = $requestFactory;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @param string  $endpoint the shortname of the endpoint  | 
            
            
                                                                                                            
                                                                
            
                                    
            
            
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                     */  | 
            
            
                                                                        
                            
            
                                    
            
            
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                    public function setEndpoint($endpoint) { | 
            
            
                                                                        
                            
            
                                    
            
            
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                        $this->endpoint = $endpoint;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * Get the profile data  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     *  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @return object|bool  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     **/  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    public function getData()  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $url = $this->getApiEndpoint();  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        try { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            $response = $this->requestFactory->request($url);  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        } catch (\Exception $e) { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            $this->logger->warning('Could not fetch data from URL "' . $url . '". Error: ' . $e->getMessage() . '.'); | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            return false;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        return $response->getBody()->getContents();  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * Creates the qualified API endpoint for retrieving the desired data  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     *  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     * @return string  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                     **/  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    protected function getApiEndpoint()  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        return $this->viafUrl . '/' . $this->endpoint;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    }  | 
            
            
                                                                                                            
                                                                
            
                                    
            
            
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                }  | 
            
            
                                                        
            
                                    
            
            
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