<?php

namespace CorpusParole\Repositories;

use Config;

use Log;

use CorpusParole\Models\Document;

/**

 * Implement the DocumentRepository using EasyRdf

 */

class RdfDocumentRepository implements DocumentRepository {

    private $sparqlClient;

    function __construct() {

        $this->sparqlClient = new \EasyRdf_Sparql_Client(Config::get('corpusparole.sesame_query_url'));

    }

    public function all() {

        $docs = $this->sparqlClient->query(

            'SELECT * WHERE {'.

            '    ?uri <http://xmlns.com/foaf/0.1/primaryTopic> ?b;'.

            '} ORDER BY ?uri'

        );

        $data = [];

        foreach ($docs as $doc) {

            array_push($data, new Document($doc->uri->getUri()));

        }

        return $data;

    }

    public function get($id) {

        $doc_uri = Config::get('corpusparole.cocoon_doc_id_base_uri').$id;

        //$doc = $sparql->query(

        //	"CONSTRUCT {".

        //	"    ?doc ?p ?v.".

        //	"}".

        //	"WHERE {".

        //	"    <$doc_uri> <http://xmlns.com/foaf/0.1/primaryTopic> ?doc.".

        //	"    ?doc ?p ?v;".

        //	"}"

        //);

        // We want the CBD (Concise Bounded Description, cf. http://www.w3.org/Submission/CBD/)

        // WARNING: This seems to work in sesame for our dataset.

        $doc = $this->sparqlClient->query(

            'DESCRIBE ?doc '.

            'WHERE {'.

            "    <$doc_uri> <http://xmlns.com/foaf/0.1/primaryTopic> ?doc;".

            '}'

        );

        return new Document($doc_uri, $doc);

    }

}