AphrontFormRecaptchaControl.php
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	<?php

	final class AphrontFormRecaptchaControl extends AphrontFormControl {

	protected function getCustomControlClass() {
	return 'aphront-form-control-recaptcha';
	}

	protected function shouldRender() {
	return self::isRecaptchaEnabled();
	}

	public static function isRecaptchaEnabled() {
	return PhabricatorEnv::getEnvConfig('recaptcha.enabled');
	}

	public static function hasCaptchaResponse(AphrontRequest $request) {
	return $request->getBool('g-recaptcha-response');
	}

	public static function processCaptcha(AphrontRequest $request) {
	if (!self::isRecaptchaEnabled()) {
	return true;
	}

	$uri = 'https://www.google.com/recaptcha/api/siteverify';
	$params = array(
	'secret' => PhabricatorEnv::getEnvConfig('recaptcha.private-key'),
	'response' => $request->getStr('g-recaptcha-response'),
	'remoteip' => $request->getRemoteAddress(),
	);

	list($body) = id(new HTTPSFuture($uri, $params))
	->setMethod('POST')
	->resolvex();

	$json = phutil_json_decode($body);
	return (bool)idx($json, 'success');
	}

	protected function renderInput() {
	$js = 'https://www.google.com/recaptcha/api.js';
	$pubkey = PhabricatorEnv::getEnvConfig('recaptcha.public-key');

	return array(
	phutil_tag('div', array(
	'class' => 'g-recaptcha',
	'data-sitekey' => $pubkey,
	)),

	phutil_tag('script', array(
	'type' => 'text/javascript',
	'src' => $js,
	)),
	);
	}
	}