book.php
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book.php
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	<?php

	class Book {
	/**
	* OCLC number
	*/
	public $OCLC;

	public function queryWorldCatFromOCLC () {
	$oclc = (string)(int)$this->OCLC;

	$url = 'http://www.worldcat.org/oclc/' . $oclc;
	$rdf = new EasyRdf_Graph($url . '.rdf');
	$rdf->load();
	$resources = $rdf->resources();
	$book = $resources[$url];

	//Core info
	$this->Title = (string)$book->getLiteral('schema:name');
	$publisherData = $book->get('schema:publisher');
	if ($publisherData) {
	$this->Publisher = (string)$publisherData->get('schema:name');
	}

	//Publishing date
	$date = (string)$book->getLiteral('schema:datePublished');
	if (strlen($date) == 4) {
	$this->YYYY = $date;
	} else {
	echo '<div class="alert-box">Publishing date: ', $date, " / check the template, the code doesn't know how to parse this format and only made a guess. ",
	'<a href="" class="close">×</a></div>';
	$date = date_parse($date);
	$this->YYYY = $date['year'];
	$this->MM = $date['month'];
	$this->DD = $date['day'];
	}

	//Authors
	$this->Authors = [];
	//TODO: look type mapping
	$contributors = $book->allResources('schema:contributor');
	foreach ($contributors as $contributor) {
	$this->Authors[] = [
	(string)$contributor->get('schema:givenName'),
	(string)$contributor->get('schema:familyName')
	];
	}

	//Kludge for library:placeOfPublication
	//We have generally two links, one for the city, one for the country.
	//Only the city has a schema:name, the country is only a reference.
	$rdf_content = file_get_contents($url . '.rdf');
	if (preg_match_all('@<library:placeOfPublication rdf:resource="(.*)"/>@', $rdf_content, $matches)) {
	foreach ($matches[1] as $place) {
	if ($cityCandidate = (string)$resources[$place]->get('schema:name')) {
	$this->Place = $cityCandidate;
	break;
	}
	}
	}
	}
	}

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