Enjoys\CartesianIterator\CartesianIterator

Complexity

Total Complexity

10

Size/Duplication

Total Lines	69
Duplicated Lines	0 %

Test Coverage

Coverage

100%

Importance

Changes	6
Bugs	1	Features	1

6 Methods

Rating	Name	Duplication	Size	Complexity
A	setFlags()	0	3	1
A	detachIterator()	0	12	2
A	toArray()	0	7	2
A	next()	0	7	3
A	__construct()	0	3	1
A	attachIterator()	0	4	1

<?php

declare(strict_types=1);

namespace Enjoys\CartesianIterator;

use Iterator;
use MultipleIterator;

final class CartesianIterator extends MultipleIterator
{
    /** @var Iterator[] */
    private $iterators = [];

    /** @var int */
    private $info = 0;

    /**
     * @param int $flags
     * @psalm-suppress ArgumentTypeCoercion
     */
    public function __construct($flags = MultipleIterator::MIT_KEYS_ASSOC)
    {
        parent::__construct($flags  | MultipleIterator::MIT_NEED_ALL);
    }

    /**
     * @param int $flags
     * @return void
     * @psalm-suppress ArgumentTypeCoercion
     */
    public function setFlags($flags): void
    {
        parent::setFlags($flags | MultipleIterator::MIT_NEED_ALL);
    }

    /**
     * @param Iterator $iterator
     * @param int|null|string $info
     * @return void
     */
    public function attachIterator(Iterator $iterator, $info = null): void
    {
        $this->iterators[] = $iterator;
        parent::attachIterator($iterator, $info ?? $this->info++);
    }

    public function detachIterator(Iterator $iterator): void
    {
        if (!$this->containsIterator($iterator)) {
            return;
        }

        parent::detachIterator($iterator);

        $key = array_search($iterator, $this->iterators, true);
        unset($this->iterators[$key]);

        $this->iterators = array_values($this->iterators);
    }

    public function next(int $index = 0): void
    {
        $iterator = $this->iterators[$index++];
        $iterator->next();
        if (!$iterator->valid() && $index < $this->countIterators()) {
            $iterator->rewind();
            $this->next($index);
        }
    }

    public function toArray(): array
    {
        $result = [];
        foreach ($this as $item) {
            $result[] = $item;
        }
        return $result;
    }

}