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<?php
/**
 * Iterator for arrays requiring filtered values
 *
 * @package Requests
 * @subpackage Utilities
 */

/**
 * Iterator for arrays requiring filtered values
 *
 * @package Requests
 * @subpackage Utilities
 */
class Requests_Utility_FilteredIterator extends ArrayIterator {
    /**
     * Callback to run as a filter
     *
     * @var callable
     */
    protected $callback;

    /**
     * Create a new iterator
     *
     * @param array $data
     * @param callable $callback Callback to be called on each value
     */
    public function __construct($data, $callback) {
        parent::__construct($data);

        $this->callback = $callback;
    }

    /**
     * Get the current item's value after filtering
     *
     * @return string
     */
    public function current() {
        $value = parent::current();

        if (is_callable($this->callback)) {
            $value = call_user_func($this->callback, $value);
        }

        return $value;
    }

    /**
     * @inheritdoc
     */
    public function unserialize($serialized) {}

    /**
     * @inheritdoc
     *
     * @phpcs:disable PHPCompatibility.FunctionNameRestrictions.NewMagicMethods.__unserializeFound
     */
    public function __unserialize($serialized) {}

    public function __wakeup() {
        unset($this->callback);
    }
}