smuuf/primi

<?php

declare(strict_types=1);

namespace Smuuf\Primi\Handlers\Kinds;

use \Smuuf\Primi\Context;
use \Smuuf\Primi\Ex\UndefinedVariableError;
use \Smuuf\Primi\Handlers\SimpleHandler;
use \Smuuf\Primi\Values\AbstractValue;

class Variable extends SimpleHandler {

    protected static function handle(array $node, Context $context) {
        return self::fetch($node['var'], $context);
    }

    public static function fetch(
        string $name,
        Context $context
    ): AbstractValue {

        $value = $context->getVariable($name);
        if ($value === \null) {
            throw new UndefinedVariableError($name);
        }

        return $value;

    }

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

}