Feature: added ProtectionFastInput

src/Controls/ProtectionFastInput.php

@@ -0,0 +1,55 @@
+<?php declare(strict_types = 1);
+
+namespace Contributte\Forms\Controls;
+
+use Nette\Forms\Controls\HiddenField;
+use Nette\Utils\Html;
+
+class ProtectionFastInput extends HiddenField
+{
+
+	/** @var string */
+	private $diff;
+
+	public function __construct(string $diff = '+5 second', string $message = 'Form was submitted to fast. Are you robot?')
+	{
+		parent::__construct();
+
+		$this->diff = $diff;
+
+		$this->setOmitted()
+			->setRequired(false)
+			->addRule([$this, 'validateInput'], $message);
+	}
+
+	/**
+	 * @inheritdoc
+	 */
+	public function setValue($value): self
+	{
+		return $this;
+	}
+
+	public function loadHttpData(): void
+	{
+		$this->value = $this->getHttpData(Form::DATA_TEXT);
+	}
+
+	public function getControl(): Html
+	{
+		return parent::getControl()->value(time());
+	}
+
+	public function validateInput(ProtectionFastInput $control): bool
+	{
+		$value = (string) $control->getValue();
+
+		$d1 = new DateTime('@' . $value);
+		$d1->modify($this->diff);
+
+		$d2 = new DateTime('@' . time());
+
+		return $d1 <= $d2;
+	}
+
+}