Smoren\PartialIntersection\Util\JustifyMultipleIterator

Complexity

Total Complexity

13

Size/Duplication

Total Lines	80
Duplicated Lines	0 %

Test Coverage

Coverage

100%

Importance

Changes	1
Bugs	0	Features	1

6 Methods

Rating	Name	Duplication	Size	Complexity
A	next()	0	8	3
A	valid()	0	9	3
A	rewind()	0	6	2
A	__construct()	0	4	2
A	current()	0	5	2
A	key()	0	3	1

<?php

namespace Smoren\PartialIntersection\Util;

/**
 * @implements \Iterator<array<mixed>>
 *
 * Based on IterTools PHP's IteratorFactory.
 * @see https://github.com/markrogoyski/itertools-php
 * @see https://github.com/markrogoyski/itertools-php/blob/main/src/Util/JustifyMultipleIterator.php
 */
class JustifyMultipleIterator implements \Iterator
{
    /**
     * @var array<\Iterator<mixed>>

The doc comment array<\Iterator<mixed>> at position 2 could not be parsed: Expected '>' at position 2, but found '\Iterator'.

     */
    protected array $iterators = [];
    /**
     * @var int
     */
    protected int $index = 0;

    /**
     * @param iterable<mixed> ...$iterables
     */
    public function __construct(iterable ...$iterables)
    {
        foreach ($iterables as $iterable) {
            $this->iterators[] = IteratorFactory::makeIterator($iterable);
        }
    }

    /**
     * {@inheritDoc}
     *
     * @return array<mixed>
     */
    public function current(): array
    {
        return array_map(
            fn (\Iterator $iterator) => $iterator->valid() ? $iterator->current() : NoValueMonad::getInstance(),
            $this->iterators
        );
    }

    /**
     * {@inheritDoc}
     */
    public function next(): void
    {
        foreach ($this->iterators as $iterator) {
            if ($iterator->valid()) {
                $iterator->next();
            }
        }
        $this->index++;
    }

    /**
     * {@inheritDoc}
     *
     * @return int
     */
    public function key(): int
    {
        return $this->index;
    }

    /**
     * {@inheritDoc}
     */
    public function valid(): bool
    {
        foreach ($this->iterators as $iterator) {
            if ($iterator->valid()) {
                return true;
            }
        }

        return false;
    }

    /**
     * {@inheritDoc}
     */
    public function rewind(): void
    {
        foreach ($this->iterators as $iterator) {
            $iterator->rewind();
        }
        $this->index = 0;
    }
}