<?php

namespace Opis\JsonSchema\Parsers;

use Opis\JsonSchema\Exceptions\InvalidKeywordException;
use Opis\JsonSchema\Info\SchemaInfo;

trait KeywordParserTrait
{
    /** @var string */
    protected string $keyword;

    /**
     * @param string $keyword
     */
    public function __construct(string $keyword)
    {
        $this->keyword = $keyword;
    }

    /**
     * @param object|SchemaInfo $schema
     * @param string|null $keyword
     * @return bool
     */
    protected function keywordExists(object $schema, ?string $keyword = null): bool
    {
        if ($schema instanceof SchemaInfo) {
            $schema = $schema->data();
        }

        return property_exists($schema, $keyword ?? $this->keyword);
    }

    /**
     * @param object|SchemaInfo $schema
     * @param string|null $keyword
     * @return mixed
     */
    protected function keywordValue(object $schema, ?string $keyword = null)
    {
        if ($schema instanceof SchemaInfo) {
            $schema = $schema->data();
        }

        return $schema->{$keyword ?? $this->keyword};
    }

    /**
     * @param string $message
     * @param SchemaInfo $info
     * @param string|null $keyword
     * @return InvalidKeywordException
     */
    protected function keywordException(
        string $message,
        SchemaInfo $info,
        ?string $keyword = null,
    ): InvalidKeywordException {
        $keyword = $keyword ?? $this->keyword;

        return new InvalidKeywordException(str_replace('{keyword}', $keyword, $message), $keyword, $info);
    }
}
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