Locale.php

<?php
/*
 * citeproc-php
 *
 * @link        http://github.com/seboettg/citeproc-php for the source repository
 * @copyright   Copyright (c) 2016 Sebastian Böttger.
 * @license     https://opensource.org/licenses/MIT
 */
 
namespace Seboettg\CiteProc\Locale;
 
use InvalidArgumentException;
use Seboettg\CiteProc\Exception\CiteProcException;
use Seboettg\CiteProc\StyleSheet;
use Seboettg\Collection\ArrayList;
use SimpleXMLElement;
use stdClass;
 
class Locale
{
    use LocaleXmlParserTrait;
 
    private $localeXml;
 
    private $language;
 
    public function __construct($lang = "en-US", $xmlString = null)
    {
        $this->language = $lang;
 
        if (!empty($xmlString)) {
            $this->localeXml = new SimpleXMLElement($xmlString);
        } else {
            $this->localeXml = new SimpleXMLElement(StyleSheet::loadLocales($lang));
        }
 
        $this->initLocaleXmlParser();
        $this->parseXml($this->localeXml);
    }
 
    public function addXml(SimpleXMLElement $xml)
    {
        $lang = (string) $xml->attributes('http://www.w3.org/XML/1998/namespace')->{'lang'};
        if (empty($lang) || $this->getLanguage() === $lang || explode('-', $this->getLanguage())[0] === $lang) {
            $this->parseXml($xml);
        }
        return $this;
    }
 
    public function getLanguage()
    {
        return $this->language;
    }
 
    public function filter($type, $name, $form = "long")
    {
        if (!isset($this->{$type})) {
            throw new InvalidArgumentException("There is no locale of type \"$type\".");
        }
 
        $localeList = $this->{$type};
 
        if (is_null($name)) {
            $name = "";
        }
 
        //filter by name
        $array = $localeList->get($name);
 
        if (empty($array)) {
            $ret = new stdClass();
            $ret->name = null;
            $ret->single = null;
            $ret->multiple = null;
            return $ret;
        }
 
        //filter by form
        if ($type !== "options") {
            $array = array_filter($array, function ($term) use ($form) {
                return $term->form === $form;
            });
        }
 
        return array_pop($array);
    }
}