loophp\collection\Operation\Group

Complexity

Total Complexity

5

Size/Duplication

Total Lines	36
Duplicated Lines	0 %

Test Coverage

Coverage

100%

Importance

Changes

0

1 Method

Rating	Name	Duplication	Size	Complexity
A	__invoke()	0	31	5

<?php

declare(strict_types=1);

namespace loophp\collection\Operation;

use Closure;
use Generator;

/**
 * @immutable
 *
 * @template TKey
 * @template T
 */
final class Group extends AbstractOperation
{
    /**
     * @return Closure(iterable<TKey, T>): Generator<int, list<T>>
     */
    public function __invoke(): Closure
    {
        return
            /**
             * @param iterable<TKey, T> $iterable
             *
             * @return Generator<int, list<T>>
             */
            static function (iterable $iterable): Generator {
                $last = [];

                foreach ($iterable as $current) {
                    if ([] === $last) {
                        $last = [$current];

                        continue;
                    }

                    if (current($last) === $current) {
                        $last[] = $current;

                        continue;
                    }

                    yield $last;

                    $last = [$current];
                }

                if ([] !== $last) {
                    yield $last;
                }
            };
    }
}