loophp\iterators\StringIteratorAggregate

Complexity

Total Complexity

6

Size/Duplication

Total Lines	40
Duplicated Lines	0 %

Test Coverage

Coverage

100%

Importance

Changes	1
Bugs	0	Features	0

2 Methods

Rating	Name	Duplication	Size	Complexity
A	__construct()	0	24	5
A	getIterator()	0	3	1

<?php

/**
 * For the full copyright and license information, please view
 * the LICENSE file that was distributed with this source code.
 */

declare(strict_types=1);

namespace loophp\iterators;

use Closure;
use Generator;
use IteratorAggregate;

/**
 * @implements IteratorAggregate<int, string>
 */
final class StringIteratorAggregate implements IteratorAggregate
{
    private Closure $callable;

    private string $data;

    private string $delimiter;

    public function __construct(string $data, string $delimiter = '')
    {
        $this->callable =
            /**
             * @return Generator<int, string>
             */
            static function (string $input, string $delimiter): Generator {
                $offset = 0;

                while (
                    mb_strlen($input) > $offset
                    && false !== $nextOffset = '' !== $delimiter ? mb_strpos($input, $delimiter, $offset) : 1 + $offset
                ) {
                    yield mb_substr($input, $offset, $nextOffset - $offset);

                    $offset = $nextOffset + mb_strlen($delimiter);
                }

                if ('' !== $delimiter) {
                    yield mb_substr($input, $offset);
                }
            };
        $this->data = $data;
        $this->delimiter = $delimiter;
    }

    /**
     * @return Generator<int, string>
     */
    public function getIterator(): Generator
    {
        yield from new ClosureIteratorAggregate($this->callable, [$this->data, $this->delimiter]);
    }
}