smuuf/primi

<?php

declare(strict_types=1);

namespace Smuuf\Primi\Handlers\Kinds;

use \Smuuf\Primi\Context;
use \Smuuf\Primi\Ex\LookupError;
use \Smuuf\Primi\Values\AbstractValue;
use \Smuuf\Primi\Handlers\ChainedHandler;
use \Smuuf\Primi\Structures\AttrInsertionProxy;

class VectorAttr extends ChainedHandler {

    public static function chain(
        array $node,
        Context $context,
        AbstractValue $subject
    ) {

        $attrName = $node['attr'];

        // If this is a leaf node, return an insertion proxy instead of value.
        if ($node['leaf']) {
            return new AttrInsertionProxy($attrName, $subject);
        }

        $value = $subject->attrGet($attrName);
        if ($value === \null) {
            $typeName = $subject->getTypeName();
            throw new LookupError("Object of type '$typeName' has no attribute '$attrName'");
        }

        return $value;

    }

    public static function reduce(array &$node): void {
        $node['attr'] = $node['attr']['text'];
    }

}