class.ilCtrlArrayIterator.php

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<?php

declare(strict_types=1);

class ilCtrlArrayIterator implements ilCtrlIteratorInterface
{
    private array $data;

    public function __construct(array $data)
    {
        $this->data = $data;
    }

    public function current(): ?string
    {
        if ($this->valid()) {
            return current($this->data);
        }

        return null;
    }

    public function next(): void
    {
        next($this->data);
    }

    public function key(): ?string
    {
        if ($this->valid()) {
            return key($this->data);
        }

        return null;
    }

    public function valid(): bool
    {
        $value = current($this->data);
        $key = key($this->data);

        if (null === $key) {
            return false;
        }

        if (!is_string($value) || !is_string($key)) {
            $this->next();
            return $this->valid();
        }

        return true;
    }

    public function rewind(): void
    {
        reset($this->data);
    }
}