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    <h3>Editing: AnyOf.php</h3>
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/**
 * This file is part of the Nette Framework (https://nette.org)
 * Copyright (c) 2004 David Grudl (https://davidgrudl.com)
 */

declare(strict_types=1);

namespace Nette\Schema\Elements;

use Nette;
use Nette\Schema\Context;
use Nette\Schema\Helpers;
use Nette\Schema\Schema;


final class AnyOf implements Schema
{
	use Base;
	use Nette\SmartObject;

	/** @var array */
	private $set;


	/**
	 * @param  mixed|Schema  ...$set
	 */
	public function __construct(...$set)
	{
		if (!$set) {
			throw new Nette\InvalidStateException('The enumeration must not be empty.');
		}

		$this-&gt;set = $set;
	}


	public function firstIsDefault(): self
	{
		$this-&gt;default = $this-&gt;set[0];
		return $this;
	}


	public function nullable(): self
	{
		$this-&gt;set[] = null;
		return $this;
	}


	public function dynamic(): self
	{
		$this-&gt;set[] = new Type(Nette\Schema\DynamicParameter::class);
		return $this;
	}


	/********************* processing ****************d*g**/


	public function normalize($value, Context $context)
	{
		return $this-&gt;doNormalize($value, $context);
	}


	public function merge($value, $base)
	{
		if (is_array($value) &amp;&amp; isset($value[Helpers::PreventMerging])) {
			unset($value[Helpers::PreventMerging]);
			return $value;
		}

		return Helpers::merge($value, $base);
	}


	public function complete($value, Context $context)
	{
		$isOk = $context-&gt;createChecker();
		$value = $this-&gt;findAlternative($value, $context);
		$isOk() &amp;&amp; $value = $this-&gt;doTransform($value, $context);
		return $isOk() ? $value : null;
	}


	private function findAlternative($value, Context $context)
	{
		$expecteds = $innerErrors = [];
		foreach ($this-&gt;set as $item) {
			if ($item instanceof Schema) {
				$dolly = new Context;
				$dolly-&gt;path = $context-&gt;path;
				$res = $item-&gt;complete($item-&gt;normalize($value, $dolly), $dolly);
				if (!$dolly-&gt;errors) {
					$context-&gt;warnings = array_merge($context-&gt;warnings, $dolly-&gt;warnings);
					return $res;
				}

				foreach ($dolly-&gt;errors as $error) {
					if ($error-&gt;path !== $context-&gt;path || empty($error-&gt;variables['expected'])) {
						$innerErrors[] = $error;
					} else {
						$expecteds[] = $error-&gt;variables['expected'];
					}
				}
			} else {
				if ($item === $value) {
					return $value;
				}

				$expecteds[] = Nette\Schema\Helpers::formatValue($item);
			}
		}

		if ($innerErrors) {
			$context-&gt;errors = array_merge($context-&gt;errors, $innerErrors);
		} else {
			$context-&gt;addError(
				'The %label% %path% expects to be %expected%, %value% given.',
				Nette\Schema\Message::TypeMismatch,
				[
					'value' =&gt; $value,
					'expected' =&gt; implode('|', array_unique($expecteds)),
				]
			);
		}
	}


	public function completeDefault(Context $context)
	{
		if ($this-&gt;required) {
			$context-&gt;addError(
				'The mandatory item %path% is missing.',
				Nette\Schema\Message::MissingItem
			);
			return null;
		}

		if ($this-&gt;default instanceof Schema) {
			return $this-&gt;default-&gt;completeDefault($context);
		}

		return $this-&gt;default;
	}
}
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