<?php

namespace app\api\controller;

use think\captcha\facade\Captcha as ThinkCaptcha;
use think\facade\Cache;

class Captcha extends BaseApi
{
	/**
	 * 验证码
	 */
	public function captcha()
	{
		if (isset($this->params['captcha_id']) && !empty($this->params['captcha_id'])) {
			Cache::delete($this->params['captcha_id']);
		}
		
		$captcha_data = ThinkCaptcha::create(null, true);
		$captcha_id = md5(uniqid(null, true));
		// 验证码10分钟有效
		Cache::set($captcha_id, $captcha_data['code'], 600);
		return $this->response($this->success([ 'id' => $captcha_id, 'img' => $captcha_data['img'] ]));
	}
	
	/**
	 * 检测验证码
	 * @param boolean $snapchat 阅后即焚
	 */
	public function checkCaptcha($snapchat = true) : array
	{
		if (!isset($this->params['captcha_id']) || empty($this->params['captcha_id'])) {
			return $this->error('', 'REQUEST_CAPTCHA_ID');
		}
		
		if (!isset($this->params['captcha_code']) || empty($this->params['captcha_code'])) {
			return $this->error('', 'REQUEST_CAPTCHA_CODE');
		}
		
		if ($snapchat) $captcha_data = Cache::pull($this->params['captcha_id']);
		else $captcha_data = Cache::get($this->params['captcha_id']);
		if (empty($captcha_data)) return $this->error('', 'CAPTCHA_FAILURE');
		
		if ($this->params['captcha_code'] != $captcha_data) return $this->error('', 'CAPTCHA_ERROR');
		
		return $this->success();
	}
}