From 2f1e17ef1bae55087cbbe7d48611c24f1d317e24 Mon Sep 17 00:00:00 2001
From: Matthias Schmidt <gravatronics@live.com>
Date: Sat, 5 Jan 2019 11:14:09 +0100
Subject: [PATCH] Add captcha form field

See #2509
---
 .../builder/field/CaptchaFormField.class.php  | 114 ++++++++++++++++++
 1 file changed, 114 insertions(+)
 create mode 100644 wcfsetup/install/files/lib/system/form/builder/field/CaptchaFormField.class.php

diff --git a/wcfsetup/install/files/lib/system/form/builder/field/CaptchaFormField.class.php b/wcfsetup/install/files/lib/system/form/builder/field/CaptchaFormField.class.php
new file mode 100644
index 0000000000..c65b480557
--- /dev/null
+++ b/wcfsetup/install/files/lib/system/form/builder/field/CaptchaFormField.class.php
@@ -0,0 +1,114 @@
+<?php
+namespace wcf\system\form\builder\field;
+use wcf\system\captcha\ICaptchaHandler;
+use wcf\system\exception\SystemException;
+
+/**
+ * Implementation of a form field for a captcha.
+ * 
+ * @author	Matthias Schmidt
+ * @copyright	2001-2018 WoltLab GmbH
+ * @license	GNU Lesser General Public License <http://opensource.org/licenses/lgpl-license.php>
+ * @package	WoltLabSuite\Core\System\Form\Builder\Field
+ * @since	3.2
+ */
+class CaptchaFormField extends AbstractFormField implements IObjectTypeFormField {
+	use TDefaultIdFormField;
+	use TObjectTypeFormField {
+		objectType as defaultObjectType;
+	}
+	
+	/**
+	 * @inheritDoc
+	 */
+	public function cleanup() {
+		try {
+			/** @var ICaptchaHandler $captcha */
+			$captcha = $this->getObjectType()->getProcessor();
+			
+			$captcha->reset();
+		}
+		catch (\BadMethodCallException $e) {
+			// ignore
+		}
+		
+		return $this;
+	}
+	
+	/**
+	 * @inheritDoc
+	 */
+	public function getHtml() {
+		/** @var ICaptchaHandler $captcha */
+		$captcha = $this->getObjectType()->getProcessor();
+		
+		return $captcha->getFormElement();
+	}
+	
+	/**
+	 * @inheritDoc
+	 */
+	public function getObjectTypeDefinition() {
+		return 'com.woltlab.wcf.captcha';
+	}
+	
+	/**
+	 * @inheritDoc
+	 */
+	public function hasSaveValue() {
+		return false;
+	}
+	
+	/**
+	 * @inheritDoc
+	 */
+	public function objectType($objectType) {
+		// ignore empty object type which is the case if no captcha has been set
+		if ($objectType === '') {
+			return $this;
+		}
+		
+		return $this->defaultObjectType($objectType);
+	}
+	
+	/**
+	 * @inheritDoc
+	 */
+	public function readValue() {
+		/** @var ICaptchaHandler $captcha */
+		$captcha = $this->getObjectType()->getProcessor();
+		
+		// the captcha API relies on `$_POST` thus make sure that request data is in `$_POST`,
+		// at least temporarily
+		$requestData = $this->getDocument()->getRequestData();
+		$post = null;
+		if ($requestData !== $_POST) {
+			$post = $_POST;
+			$_POST = $requestData;
+		}
+		
+		$captcha->readFormParameters();
+		
+		// restore `$_POST`
+		if ($post !== null) {
+			$_POST = $post;
+		}
+	}
+	
+	/**
+	 * @inheritDoc
+	 */
+	public function validate() {
+		/** @var ICaptchaHandler $captcha */
+		$captcha = $this->getObjectType()->getProcessor();
+		
+		$captcha->validate();
+	}
+	
+	/**
+	 * @inheritDoc
+	 */
+	protected static function getDefaultId() {
+		return 'captcha';
+	}
+}
-- 
2.20.1