Key.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\Style\Sort;
 
use Seboettg\CiteProc\CiteProc;
use Seboettg\CiteProc\Util\Variables;
use SimpleXMLElement;
 
class Key implements SortKey
{
    private $variable;
 
    private $sort = "ascending";
 
    private $macro;
 
    private $rangePart = 1;
 
    public function __construct(SimpleXMLElement $node)
    {
        foreach ($node->attributes() as $attribute) {
            $name = $attribute->getName();
            if ($name === "variable") {
                $this->variable = (string) $attribute;
            }
            if ($name === "sort") {
                $this->sort = (string) $attribute;
            }
            if ($name === "macro") {
                $this->variable = "macro";
                $this->macro = (string) $attribute;
            }
        }
    }
 
    public function getVariable()
    {
        return $this->variable;
    }
 
    public function getSort()
    {
        return $this->sort;
    }
 
    public function getMacro()
    {
        return $this->macro;
    }
 
    public function isNameVariable()
    {
        return Variables::isNameVariable($this->variable);
    }
 
    public function isNumberVariable()
    {
        return Variables::isNumberVariable($this->variable);
    }
 
    public function isDateVariable()
    {
        return Variables::isDateVariable($this->variable);
    }
 
    public function isMacro()
    {
        return $this->variable === "macro" && !empty(CiteProc::getContext()->getMacro($this->macro));
    }
 
    public function setRangePart($rangePart)
    {
        $this->rangePart = $rangePart;
    }
 
    public function getRangePart()
    {
        return $this->rangePart;
    }
}