<?php

/**
 * League.Csv (https://csv.thephpleague.com)
 *
 * (c) Ignace Nyamagana Butera <nyamsprod@gmail.com>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */
declare (strict_types=1);
namespace IAWPSCOPED\League\Csv;

use Throwable;
/**
 * SyntaxError Exception.
 * @internal
 */
class SyntaxError extends Exception
{
    /**
     * @var array<string>
     */
    protected $duplicateColumnNames = [];
    /**
     * DEPRECATION WARNING! This class will be removed in the next major point release.
     *
     * @deprecated since version 9.7.0
     */
    public function __construct(string $message = '', int $code = 0, Throwable $previous = null)
    {
        parent::__construct($message, $code, $previous);
    }
    public static function dueToHeaderNotFound(int $offset) : self
    {
        return new self('The header record does not exist or is empty at offset: `' . $offset . '`');
    }
    public static function dueToInvalidHeaderColumnNames() : self
    {
        return new self('The header record contains non string colum names.');
    }
    public static function dueToDuplicateHeaderColumnNames(array $header) : self
    {
        $duplicates = \array_keys(\array_filter(\array_count_values($header), function (int $value) : bool {
            return $value > 1;
        }));
        $instance = new self('The header record contains duplicate column names.');
        $instance->duplicateColumnNames = $duplicates;
        return $instance;
    }
    public function duplicateColumnNames() : array
    {
        return $this->duplicateColumnNames;
    }
}
