sparql_graphstore.php

<?php
namespace GridsBy\SPARQL\GraphStore;

use Guzzle\Http\Client;

class Connection
{
    private $endpoint = '';
    private $client = null;

    /**
     * @param string $endpoint
     */
    public function __construct($endpoint)
    {
        $this->endpoint = $endpoint;
        $this->client = new Client();
    }

    public function insert(\EasyRdf_Graph $graph, $graph_iri)
    {
        return $this->insertFromString($graph->serialise('turtle'), $graph_iri, 'text/turtle');
    }

    public function insertFromFile($path, $graph_iri)
    {
        if (!file_exists($path)) {
            throw new \UnexpectedValueException("'{$path}' is not a valid file path");
        }

        return $this->insertFromString(file_get_contents($path), $graph_iri);
    }

    protected function insertFromString($data, $graph_iri, $mime_type = null)
    {
        if (null === $mime_type) {
            $format = \EasyRdf_Format::guessFormat($data);
            $mime_type = $format->getDefaultMimeType();
        }

        $params = ['graph' => $graph_iri];
        $uri = $this->endpoint.'?'.http_build_query($params);

        $request = $this->client->post($uri, ['Content-type' => $mime_type], $data);

        return $request->send();
    }
}