LinkBase.php

<?php
namespace adrianclay\xbrl\Taxonomy;


class LinkBase implements \IteratorAggregate {

    /** @var Set */
    private $set;

    /** @var string */
    private $path;

    /** @var \DOMDocument */
    private $dom;

    /** @var ArcCollection[] */
    private $links;

    /**
     * @param Set    $set
     * @param string $path
     */
    public function __construct( Set $set, $path )
    {
        $this->set = $set;
        $this->path = $path;
        $this->dom = new \DOMDocument();
        $this->dom->load( $path );
        $xpath = new \DOMXPath( $this->dom );
        $xpath->registerNamespace( 'link', 'http://www.xbrl.org/2003/linkbase' );
        $xpath->registerNamespace( 'linkbase', 'http://www.xbrl.org/2003/linkbase' );
        $lls = array();
        /** @var $element \DOMElement */
        foreach( $xpath->evaluate( '//link:linkbase/*' ) as $element ) {
            switch( $element->nodeName ) {
                case 'labelLink':
                    $lls[] = new Label\Link( $this, $element );
                    break;
                case 'referenceLink':
                    $lls[] = new Reference\Link( $this, $element );
                    break;
                case 'presentationLink':
                    $lls[] = new Presentation\Link( $this, $element );
                    break;
                case 'calculationLink':
                    $lls[] = new Calculation\Link( $this, $element );
                    break;
                case 'definitionLink':
                    $lls[] = new Definition\Link( $this, $element );
                    break;
            }
        }
        $this->links = $lls;
    }

    /**
     * Converts a string from "file.xsd#interestingElement" into a NamespaceId object
     *
     * @param string $href
     * @return NamespaceId
     */
    public function getConceptId( $href )
    {
        $parts = parse_url( $href );
        $schema = $this->set->import( dirname( $this->path ), $parts['path'] );
        return new NamespaceId( $schema->getNamespace(), $parts['fragment'] );
    }

    /**
     * @return ArcCollection[]
     */
    public function getIterator()
    {
        return new \ArrayIterator( $this->links );
    }
}