Plugin.php

<?php
/**
 * reCAPTCHAv3验证码插件
 *
 * @package reCAPTCHAv3
 * @author D-Bood
 * @version 0.0.2
 * @link http://github.com/D-Bood
 */

class reCAPTCHAv3_Plugin implements Typecho_Plugin_Interface
{

    /**
     * 激活插件方法,如果激活失败,直接抛出异常
     *
     * @access public
     * @return void
     * @throws Typecho_Plugin_Exception
     */
    	public static function activate() {
	Typecho_Plugin::factory('Widget_Feedback')->comment = array(__CLASS__, 'filter');
    }

    /**
     * 禁用插件方法,如果禁用失败,直接抛出异常
     *
     * @static
     * @access public
     * @return void
     * @throws Typecho_Plugin_Exception
     */
    	public static function deactivate() {}

    /**
     * 个人用户的配置面板
     *
     * @access public
     * @param Typecho_Widget_Helper_Form $form
     * @return void
     */
    	public static function personalConfig(Typecho_Widget_Helper_Form $form) {}

    /**
     * 获取插件配置面板
     *
     * @access public
     * @param Typecho_Widget_Helper_Form $form 配置面板
     * @return void
     */
	public static function config(Typecho_Widget_Helper_Form $form) {
		$siteKeyDescription = _t("To use reCAPTCHA you must get an API key from <a href='https://www.google.com/recaptcha/admin/create'>https://www.google.com/recaptcha/admin/create</a>");
		$siteKeyV3 = new Typecho_Widget_Helper_Form_Element_Text('siteKeyV3', NULL, '', _t('Site Key for reCAPTCHAv3:'), $siteKeyDescription);
		$secretKeyV3 = new Typecho_Widget_Helper_Form_Element_Text('secretKeyV3', NULL, '', _t('Serect Key for reCAPTCHAv3:'), _t(''));
		$form->addInput($siteKeyV3);
		$form->addInput($secretKeyV3);
	}

    /**
     * 展示验证码
     */
	public static function output() {
		$siteKey = Typecho_Widget::widget('Widget_Options')->plugin('reCAPTCHAv3')->siteKeyV3;
		$secretKey = Typecho_Widget::widget('Widget_Options')->plugin('reCAPTCHAv3')->secretKeyV3;
      		if ($siteKey != "" && $secretKey != "") {
			echo '<script src="https://recaptcha.net/recaptcha/api.js?render='.$siteKey.'"></script><input type="hidden" name="recaptcha_response" id="recaptchaResponse" class="g-recaptcha"></input><script>grecaptcha.ready(function() {grecaptcha.execute(\''.$siteKey.'\', {action: \'social\'}).then(function(token) {var recaptchaResponse = document.getElementById(\'recaptchaResponse\');recaptchaResponse.value = token;});});</script>';
      		} else {
			throw new Typecho_Widget_Exception(_t('No reCAPTCHAv3 Site/Secret Keys! Please set it/them!'));
		}
  	}

	public static function filter($comments, $obj) {
    		$userObj = $obj->widget('Widget_User');
    		if($userObj->hasLogin() && $userObj->pass('administrator', true)) {
      			return $comments;
    		}
	  	elseif (isset($_POST['recaptcha_response'])) {
			$siteKeyV3 = Typecho_Widget::widget('Widget_Options')->plugin('reCAPTCHAv3')->siteKeyV3;
			$secretKeyV3 = Typecho_Widget::widget('Widget_Options')->plugin('reCAPTCHAv3')->secretKeyV3;
			function getCaptcha($recaptcha_response, $secretKey) {
				$response = file_get_contents("https://recaptcha.net/recaptcha/api/siteverify?secret=".$secretKey."&response=".$recaptcha_response);
				$response = json_decode($response);
				return $response;
			}
			$resp = getCaptcha($_POST['recaptcha_response'], $secretKeyV3);
			if ($resp->success == true && $resp->score > 0.5) {
				return $comments;
			} else {
			switch ($resp->error-codes) {
			case '{[0] => "timeout-or-duplicate"}':
				throw new Typecho_Widget_Exception(_t('验证时间超过2分钟或连续重复发言！'));
				break;
			case '{[0] => "invalid-input-secret"}':
				throw new Typecho_Widget_Exception(_t('博主填了无效的siteKey或者secretKey...'));
				break;
                        case '{[0] => "bad-request"}':
                                throw new Typecho_Widget_Exception(_t('请求错误！请检查网络'));
                                break;
			default:
				throw new Typecho_Widget_Exception(_t('很遗憾，您被当成了机器人...'));
			}
			}
		} else {
      			throw new Typecho_Widget_Exception(_t('未成功加载验证码！请科学上网！'));
	  	}
  	}
}