NN2024010801/app/Services/Api/ImChatService.php

<?php
// +----------------------------------------------------------------------
// | LARAVEL8.0 框架 [ LARAVEL ][ RXThinkCMF ]
// +----------------------------------------------------------------------
// | 版权所有 2017~2021 LARAVEL研发中心
// +----------------------------------------------------------------------
// | 官方网站: http://www.laravel.cn
// +----------------------------------------------------------------------
// | Author: laravel开发员 <laravel.qq.com>
// +----------------------------------------------------------------------

namespace App\Services\Api;

use App\Models\AccountLogModel;
use App\Models\ImChatModel;
use App\Models\ImChatParamsModel;
use App\Models\MemberModel;
use App\Services\BaseService;
use App\Services\ConfigService;
use App\Services\RedisService;
use Illuminate\Support\Facades\DB;

/**
 * 聊天服务管理-服务类
 * @author laravel开发员
 * @since 2020/11/11
 * Class ImChatService
 * @package App\Services\Api
 */
class ImChatService extends BaseService
{
    // 静态对象
    protected static $instance = null;

    /**
     * 构造函数
     * @author laravel开发员
     * @since 2020/11/11
     * ImChatService constructor.
     */
    public function __construct()
    {
        $this->model = new ImChatModel();
    }

    /**
     * 静态入口
     * @return static|null
     */
    public static function make()
    {
        if (!self::$instance) {
            self::$instance = (new static());
        }
        return self::$instance;
    }


    /**
     * 消息列表
     * @param $userId
     * @param $params
     * @param int $pageSize
     * @return array
     */
    public function getDataList($userId, $params, $pageSize=0)
    {
        $page = request()->post('page', 1);
        $cacheKey = "caches:chats:history_{$page}_".md5($userId.json_encode($params). $pageSize);
        $datas = RedisService::get($cacheKey);
        $data = isset($datas['data'])? $datas['data'] : [];
        if($datas && $data) {
            return [
                'total'=> isset($datas['total'])? $datas['total'] : 0,
                'list'=> $data,
                'pageSize'=> $pageSize,
                'cache'=> true,
            ];
        }

        $where = ['a.status'=> 1,'a.mark'=>1];
        $expire = ConfigService::make()->getConfigByCode('chat_log_expire');
        $expire = $expire? $expire*86400 : 60*86400;
        $field = ['a.id','a.chat_key','a.message','a.from_user_id','a.to_user_id','a.is_connect','a.video_time','a.msg_type','a.create_time','a.is_read','a.status','b.avatar as from_avatar','b.nickname as from_nickname','c.avatar as to_avatar','c.nickname as to_nickname'];
        $datas = $this->model->from('imchat as a')
            ->leftJoin('member as b','b.id','=','a.from_user_id')
            ->leftJoin('member as c','c.id','=','a.to_user_id')
            ->where(function($query) use($userId){
                if($userId){
                    $query->where('a.from_user_id', $userId)->orWhere('a.to_user_id', $userId);
                }
            })
            ->where($where)
            ->where('a.create_time','>=', time() - $expire)
            ->where(function($query) use($params){
                $chatKey = isset($params['chat_key'])? trim($params['chat_key']) : '';
                if($chatKey){
                    $query->where('a.chat_key', $chatKey);
                }

                $isRead = isset($params['is_read'])? intval($params['is_read']) : 0;
                if($isRead){
                    $query->where('a.is_read', $isRead);
                }

                $isRead = isset($params['is_read'])? intval($params['is_read']) : 0;
                if($isRead){
                    $query->where('a.is_read', $isRead);
                }

                $isShow = isset($params['is_show'])? intval($params['is_show']) : 0;
                if($isShow){
                    $query->where('a.is_show', $isRead);
                }
            })
            ->select($field)
            ->orderBy('a.create_time','desc')
            ->orderBy('a.id','desc')
            ->paginate($pageSize > 0 ? $pageSize : 9999999);
        $datas = $datas ? $datas->toArray() : [];
        if ($datas) {
            $chatKey = '';
            foreach ($datas['data'] as $k=> &$item) {
                $item['show_time'] = $k == 0? 1 : 0;
                $chatKey = isset($item['chat_key'])? $item['chat_key'] : '';
                $item['time_text'] = isset($item['create_time']) && $item['create_time']? dateFormat($item['create_time']) : '';
                $item['from_avatar'] = isset($item['from_avatar']) && $item['from_avatar'] ? get_image_url($item['from_avatar']) : get_image_url('/images/member/logo.png');
                $item['to_avatar'] = isset($item['to_avatar']) && $item['to_avatar'] ? get_image_url($item['to_avatar']) : get_image_url('/images/member/logo.png');
                $info = MerchantService::make()->getCacheInfoByUser($item['from_user_id'], 'id,name,logo,status');
                $status = isset($info['status'])? $info['status'] : 0;
                if($info && $status==2){
                    $item['from_avatar'] = $info['logo'];
                    $item['from_nickname'] = $info['name'];
                }

                // 商家
                $info = MerchantService::make()->getCacheInfoByUser($item['to_user_id'], 'id,name,logo,status');
                $status = isset($info['status'])? $info['status'] : 0;
                if($info && $status==2){
                    $item['to_avatar'] = $info['logo']?$info['logo']:get_image_url('/images/member/logo.png');
                    $item['to_nickname'] = $info['name'];
                }

                if(empty($item['from_avatar'])){
                    $item['from_suffix_name'] = mb_substr($item['from_nickname'],0,1);
                }
                if(empty($item['to_avatar'])){
                    $item['to_suffix_name'] = mb_substr($item['to_nickname'],0,1);
                }

                $item['video_time_text'] =  '';
                if(isset($item['video_time']) && $item['video_time']){
                    $data = [];
                    $time = intval($item['video_time']);
                    if($time>3600){
                        $hour = intval($time/3600);
                        $data[] = $hour<10?'0'.$hour:$hour;
                    }
                    if($time%3600 > 0){
                        $minute = intval($time%3600/60);
                        $data[] = $minute<10?'0'.$minute:$minute;
                    }

                    if($time%60 > 0){
                        $second = intval($time%60);
                        $data[] = $second<10?'0'.$second:$second;
                    }
                    $item['video_time_text'] = $data? implode(':', $data) : '';
                }
            }
            unset($item);
            // 已读处理
            if($chatKey && $userId){
                $this->model->where(['chat_key'=> $chatKey,'to_user_id'=> $userId,'mark'=>1,'status'=>1])->update(['update_time'=>time(),'is_read'=>1]);

                // 清除缓存
                RedisService::keyDel("caches:chats:history*");
                RedisService::keyDel("caches:chats:group*");
                RedisService::keyDel("caches:messages:bar*");
            }

            arsort($datas['data'], true);
            $datas['data'] = array_reverse($datas['data'], false);
            RedisService::set($cacheKey, $datas, rand(3, 5));
        }
        return [
            'total'=> isset($datas['total'])? $datas['total'] : 0,
            'list'=> isset($datas['data'])? $datas['data'] : [],
            'pageSize'=> $pageSize,
            'cache'=> false,
        ];
    }

    /**
     * 消息列表
     * @param $userId
     * @param $params
     * @param int $pageSize
     * @return array
     */
    public function getDataListFromatKey($userId, $params, $pageSize=0)
    {
        $page = request()->post('page', 1);
        $cacheKey = "caches:chats:group_{$page}_".md5($userId.json_encode($params).$pageSize);
        $datas = RedisService::get($cacheKey);
        $data = isset($datas['data'])? $datas['data'] : [];
        if($datas && $data) {
            return [
                'unread'=> isset($datas['unReadCount'])? $datas['unReadCount'] : 0,
                'total'=> isset($datas['total'])? $datas['total'] : 0,
                'list'=> $data,
                'pageSize'=> $pageSize,
                'cache'=> true,
            ];
        }

        $where = ['a.status'=> 1,'a.mark'=>1];
        $expire = ConfigService::make()->getConfigByCode('chat_log_expire');
        $expire = $expire? $expire*86400 : 60*86400;
        $field = ['a.id','a.chat_key','a.from_user_id','a.to_user_id','a.msg_type','a.create_time','a.video_time','a.is_connect','a.is_read','a.from_is_show','a.to_is_show','a.status','b.avatar as from_avatar','b.nickname as from_nickname','c.avatar as to_avatar','c.nickname as to_nickname'];
        $datas = $this->model->from('imchat as a')
            ->leftJoin('member as b','b.id','=','a.from_user_id')
            ->leftJoin('member as c','c.id','=','a.to_user_id')
            ->where(function($query) use($userId){
                if($userId){
                    $query->where(['a.from_user_id'=>$userId,'a.from_is_show'=>1])
                        ->orWhere(function($query) use($userId){
                            $query->where(['a.to_user_id'=>$userId,'a.to_is_show'=>1]);
                        });
                }
            })
            ->where($where)
            ->where('a.chat_key','>', 0)
            ->where('a.create_time','>=', time() - $expire)
            ->where(function($query) use($params){
                $chatKey = isset($params['chat_key'])? trim($params['chat_key']) : '';
                if($chatKey){
                    $query->where('a.chat_key', $chatKey);
                }

                $isRead = isset($params['is_read'])? intval($params['is_read']) : 0;
                if($isRead){
                    $query->where('a.is_read', $isRead);
                }

                $isRead = isset($params['is_read'])? intval($params['is_read']) : 0;
                if($isRead){
                    $query->where('a.is_read', $isRead);
                }
            })
            ->select($field)
            ->groupBy('chat_key')
//            ->orderBy('a.is_read','desc')
            ->orderBy('a.create_time','desc')
            ->orderBy('a.id','desc')
            ->paginate($pageSize > 0 ? $pageSize : 9999999);
        $datas = $datas ? $datas->toArray() : [];
        $unReadCount = 0;
        if ($datas) {
            foreach ($datas['data'] as &$item) {
                $item['from_avatar'] = isset($item['from_avatar']) && $item['from_avatar'] ? get_image_url($item['from_avatar']) : get_image_url('/images/member/logo.png');
                $item['to_avatar'] = isset($item['to_avatar']) && $item['to_avatar'] ? get_image_url($item['to_avatar']) : get_image_url('/images/member/logo.png');
                $data = $this->getNewChat($item['chat_key']);
                $item['description'] = isset($data['description']) && $data['description']? $data['description'] : (isset($data['message'])? mb_substr($data['message'],0,20,'utf-8'):'有新消息');
                $item['create_time'] = isset($data['create_time']) && $data['create_time']? $data['create_time'] : '';
                $item['time_text'] = isset($item['create_time']) && $item['create_time'] ? dateFormat($item['create_time']) : '';
                $item['create_time'] = isset($item['create_time']) ? datetime($item['create_time'], 'Y-m-d H.i.s') : '';
                if($item['from_user_id'] == $userId){
                    $item['avatar'] = $item['to_avatar'];
                    $item['nickname'] = $item['to_nickname'];
                    $info = MerchantService::make()->getCacheInfoByUser($item['to_user_id'], 'id,name,logo,status');
                    $status = isset($info['status'])? $info['status'] : 0;

                    if($info && $status==2){
                        $item['avatar'] = $info['logo']?$info['logo']:get_image_url('/images/member/logo.png');
                        $item['nickname'] = $info['name'];
                    }
                    $item['unread'] = $this->getUnreadCount($userId, $item['chat_key']);
                    $item['touid'] = $item['to_user_id'];
                }else{
                    $item['avatar'] = $item['from_avatar'];
                    $item['nickname'] = $item['from_nickname'];
                    $info = MerchantService::make()->getCacheInfoByUser($item['from_user_id'], 'id,name,logo,status');
                    $status = isset($info['status'])? $info['status'] : 0;
                    if($info && $status==2){
                        $item['avatar'] = $info['logo']?$info['logo'] : get_image_url('/images/member/logo.png');
                        $item['nickname'] = $info['name'];
                    }
                    $item['unread'] = $this->getUnreadCount($userId,$item['chat_key']);
                    $item['touid'] = $item['from_user_id'];
                }

                $item['video_time_text'] =  '';
                if(isset($item['video_time']) && $item['video_time']){
                    $data = [];
                    $time = intval($item['video_time']);
                    if($time>3600){
                        $hour = intval($time/3600);
                        $data[] = $hour<10?'0'.$hour:$hour;
                    }
                    if($time%3600 > 0){
                        $minute = intval($time%3600/60);
                        $data[] = $minute<10?'0'.$minute:$minute;
                    }

                    if($time%60 > 0){
                        $second = intval($time%60);
                        $data[] = $second<10?'0'.$second:$second;
                    }
                    $item['video_time_text'] = $data? implode(':', $data) : '';
                }

                $unReadCount += intval($item['unread']);
            }
            unset($item);
            $datas['unReadCount'] = $unReadCount;
            RedisService::set($cacheKey, $datas, rand(3, 5));
        }
        return [
            'unread'=> $unReadCount,
            'total'=> isset($datas['total'])? $datas['total'] : 0,
            'list'=> isset($datas['data'])? $datas['data'] : [],
            'pageSize'=> $pageSize,
            'cache'=> false,
        ];
    }

    /**
     * 获取最新消息
     * @param $chatKey
     * @return mixed
     */
    public function getNewChat($chatKey)
    {
        $cacheKey = "caches:chats:new_{$chatKey}";
        $data = RedisService::get($cacheKey);
        if($data){
            return $data;
        }
        $where = ['chat_key'=>$chatKey,'status'=>1,'mark'=>1];
        $data = $this->model->where($where)->select('id','description','message','create_time')
            //->orderBy('is_read','desc')
            ->orderBy('create_time','desc')
            ->orderBy('id','desc')
            ->first();
        $data = $data? $data->toArray() : [];
        if($data){
            RedisService::set($cacheKey, $data, rand(3,5));
        }
        return $data;
    }

    /**
     * 未读聊天消息数量
     * @param $userId
     * @return array|mixed
     */
    public function getUnreadCount($userId, $chatKey=0)
    {
        $cacheKey = "caches:chats:unReadCount:{$userId}_{$chatKey}";
        $data = RedisService::get($cacheKey);
        if($data){
            return intval($data);
        }
        $where = ['to_user_id'=> $userId,'status'=>1,'to_is_show'=>1,'is_read'=>2,'mark'=>1];
        if($chatKey){
            $where['chat_key'] = $chatKey;
        }
        $data = $this->model->where($where)->count('id');
        $data = $data? intval($data) : 0;
        RedisService::set($cacheKey, $data, rand(3, 5));
        return $data;
    }

    /**
     * 今日消息数量
     * @param $userId
     * @return array|mixed
     */
    public function getCount($userId, $chatKey=0)
    {
        $where = ['to_user_id'=> $userId,'status'=>1,'to_is_show'=>1,'mark'=>1];
        if($chatKey){
            $where['chat_key'] = $chatKey;
        }
        $data = $this->model->where($where)->where('create_time','>=', time() - 2 * 86400)->count('id');
        $data = $data? intval($data) : 0;
        return $data;
    }

    /**
     * 验证是否还有聊天次数或者时长
     * @param $fromUserId 发送或发起用户ID
     * @param $toUserId 聊天对方用户ID
     * @param int $chatType 聊天类型：1-文字类型，2-视频/语音
     * @return mixed
     */
    public function checkChat($fromUserId, $toUserId, $chatType=1)
    {
        // 如果是客服，发送不限制
        $checkIsCustom = MemberModel::where(['id'=> $fromUserId,'mark'=>1])->value('is_custom');
        if($checkIsCustom == 1){
            return true;
        }
        $params = ImChatParamsModel::where(['from_user_id'=> $fromUserId, 'to_user_id'=> $toUserId,'mark'=>1])
            ->select(['id','chat_num','chat_time'])
            ->first();
        $params = $params? $params->toArray() : [];
        $chatNum = isset($params['chat_num'])? intval($params['chat_num']) : 0;
        $chatTime = isset($params['chat_time'])? intval($params['chat_time']) : 0;

        // 未购买过次数的获取系统默认免费参数
        if(empty($params)) {
            $chatNum = ConfigService::make()->getConfigByCode('chat_free_num');
            $chatTime = ConfigService::make()->getConfigByCode('chat_free_time');
            $chatTime = $chatTime*60;
            if($chatNum>0) {
                $data = [
                    'from_user_id'=> $fromUserId,
                    'to_user_id'=> $toUserId,
                    'chat_num'=> $chatNum>0? intval($chatNum) : 0,
                    'chat_time'=> $chatTime>0? intval($chatTime) : 0,
                    'update_time'=> time(),
                    'remark'=> '更新系统免费参数',
                    'mark'=> 1
                ];
                ImChatParamsModel::insert($data);
            }
        }

        return $chatType==1? $chatNum : $chatTime;
    }

    /**
     * 更新聊天参数
     * @param $fromUserId
     * @param $toUserId
     * @param $num
     * @param int $chatType
     */
    public function updateChatParams($fromUserId, $toUserId, $num=1, $chatType=1)
    {
        if(empty($fromUserId) || empty($toUserId)){
            return false;
        }

        if(!$id = ImChatParamsModel::where(['from_user_id'=> $fromUserId, 'to_user_id'=> $toUserId,'mark'=>1])->value('id'))
        {
            $chatNum = ConfigService::make()->getConfigByCode('chat_free_num');
            $chatTime = ConfigService::make()->getConfigByCode('chat_free_time');
            $chatTime = $chatTime*60;
            $data = [
                'from_user_id'=> $fromUserId,
                'to_user_id'=> $toUserId,
                'chat_num'=> $chatNum>0? intval($chatNum) : 0,
                'chat_time'=> $chatTime>0? intval($chatTime) : 0,
                'update_time'=> time(),
                'remark'=> '更新系统免费参数',
                'mark'=> 1
            ];
            return ImChatParamsModel::insertGetId($data);
        }else{
            if($chatType == 1){
                return ImChatParamsModel::where(['from_user_id'=> $fromUserId, 'to_user_id'=> $toUserId,'mark'=>1])
                    ->decrement('chat_num', $num);
            }else{
                return ImChatParamsModel::where(['from_user_id'=> $fromUserId, 'to_user_id'=> $toUserId,'mark'=>1])
                    ->decrement('chat_time', $num);
            }
        }
    }

    /**
     * 已读
     * @param $userId 用户ID
     * @param $chatKey 聊天窗口ID
     * @return bool
     */
    public function setRead($userId, $chatKey)
    {
        $this->model->where(['chat_key'=> $chatKey])
            ->where(['to_user_id'=>$userId])
            ->update(['is_read'=>1,'update_time'=>time()]);

        // 清除缓存
        RedisService::keyDel("caches:chats:history*");
        RedisService::keyDel("caches:chats:group*");
        RedisService::keyDel("caches:messages:bar*");
        return true;
    }

    /**
     * 隐藏
     * @param $userId 用户ID
     * @param $chatKey 聊天窗口ID
     * @return bool
     */
    public function setHide($userId, $chatKey)
    {
        $this->model->where(['chat_key'=> $chatKey])
            ->where(['from_user_id'=>$userId])
            ->update(['from_is_show'=>2,'is_read'=>1,'update_time'=>time()]);
        $this->model->where(['chat_key'=> $chatKey])
            ->where(['to_user_id'=>$userId])
            ->update(['to_is_show'=>2,'is_read'=>1,'update_time'=>time()]);

        // 清除缓存
        RedisService::keyDel("caches:chats:history*");
        RedisService::keyDel("caches:chats:group*");
        RedisService::keyDel("caches:messages:bar*");
        return true;
    }

    /**
     * 按窗口清除
     * @param $userId 用户ID
     * @param $chatKey 聊天窗口KEY
     * @return bool
     */
    public function clear($userId, $chatKey)
    {
        $this->model->where(['from_user_id'=>$userId,'chat_key'=>$chatKey])->update(['from_is_show'=>2,'is_read'=>1,'update_time'=>time()]);
        $this->model->where(['to_user_id'=>$userId,'chat_key'=>$chatKey])->update(['to_is_show'=>2,'is_read'=>1,'update_time'=>time()]);
        return true;
    }

    /**
     * 清除历史
     * @param $userId
     * @param $type
     * @return mixed
     */
    public function clearAll($userId, $type=1)
    {
        if($type == 1){
            // 列表窗
            $this->model->where(['from_user_id'=>$userId])->update(['from_is_show'=>2,'is_read'=>1,'update_time'=>time()]);
            $this->model->where(['to_user_id'=>$userId])->update(['to_is_show'=>2,'is_read'=>1,'update_time'=>time()]);
        }else{
            // 删除
            $this->model->where('mark', 1)->where(function($query) use($userId){
                $query->where(['from_user_id'=>$userId])->whereOr(['to_user_id'=>$userId]);
            })->update(['mark'=>0,'update_time'=>time()]);
        }

        // 删除历史
        $this->model->where('mark', 0)->where('update_time','<', time() - 7*86400)->delete();

        // 站内消息
        MessageService::make()->clearAll($userId);
        return true;
    }

    /**
     * 聊天付费
     * @param $userId
     * @param $params
     * @return bool
     */
    public function buyChat($userId, $params)
    {
        $userInfo = MemberService::make()->getCacheInfo(['id'=>$userId,'status'=>1]);
        $balance = isset($userInfo['balance'])? floatval($userInfo['balance']) : 0;
        if(empty($userInfo)){
            $this->error = 2401;
            return false;
        }

        $chatType = isset($params['type'])? intval($params['type']) : 0;
        $configKey = $chatType==1? 'chat_buy_num_money':'chat_buy_time_money';
        $config = ConfigService::make()->getConfigByCode($configKey);
        $config = $config? explode('/', $config) : [];
        $money = isset($config[0])?floatval($config[0]) : 0;
        $num = isset($config[1])?intval($config[1]) : 0;
        $fromUserId = isset($params['from_user_id'])? intval($params['from_user_id']) : 0;
        $toUserId = isset($params['to_user_id'])? intval($params['to_user_id']) : 0;
        if($money<=0 || $num<=0 || $toUserId<=0 || $fromUserId<=0){
            $this->error = 2402;
            return false;
        }

        // 验证余额是否足够
        if($balance < $money){
            $this->error = 2403;
            return false;
        }
        // 购买数量
        DB::beginTransaction();
        if(!MemberModel::where(['id'=> $userId])->decrement('balance', $money)){
            DB::rollBack();
            $this->error = 2404;
            return false;
        }

        // 账户明细
        $orderNo = get_order_num('CH');
        $data = [
            'user_id'=> $userId,
            'source_order_no'=> $orderNo,
            'source_uid'=> $toUserId,
            'type'=> 8,
            'coin_type'=> 4,
            'user_type'=> 1,
            'money'=> $money,
            'balance'=> $balance,
            'create_time'=> time(),
            'update_time'=> time(),
            'remark'=> $chatType==1? "聊天付费购买{$num}次":"视频聊天付费购买{$num}分钟",
            'status'=> 1,
        ];

        if(!AccountLogModel::insertGetId($data)){
            DB::rollBack();
            $this->error = 2405;
            return false;
        }

        // 聊天参数处理
        if($chatType == 1){
            $data = ['chat_num'=> DB::raw("chat_num + {$num}"),'update_time'=> time()];
            if(!ImChatParamsModel::where(['from_user_id'=> $fromUserId, 'to_user_id'=> $toUserId,'mark'=>1])
                ->update($data)){
                DB::rollBack();
                $this->error = 2405;
                return false;
            }
        }else{
            $time = $num*60;
            $data = ['chat_time'=> DB::raw("chat_time + {$time}"),'update_time'=> time()];
            if(!ImChatParamsModel::where(['from_user_id'=> $fromUserId, 'to_user_id'=> $toUserId,'mark'=>1])
                ->update($data)){
                DB::rollBack();
                $this->error = 2406;
                return false;
            }
        }

        $this->error = 2407;
        DB::commit();

        $log = [
            'user_id'=> 0,
            'merch_id'=> 0,
            'source_uid'=> $userId,
            'source_order_no'=> $orderNo,
            'type'=> 13,
            'coin_type'=> 2,
            'user_type'=> 5,
            'money'=> $money,
            'balance'=> 0,
            'create_time'=> time(),
            'update_time'=> time(),
            'remark'=> '平台聊天收入',
            'status'=>1,
            'mark'=>1
        ];
        if(!AccountLogModel::insertGetId($log)){
            $this->error = 2641;
            return false;
        }

        // 平台流水
        FinanceService::make()->saveLog(0, $money, 1, 1);

        return true;
    }

    /**
     * 待通知消息
     * @param $noticeUserId
     * @return array|mixed
     */
    public function countByWait($noticeUserId)
    {
        $cacheKey = "caches:chat:counts:user_{$noticeUserId}";
        $count = RedisService::get($cacheKey);
        if($count){
            return $count;
        }

        $where = ['to_user_id'=> $noticeUserId,'status'=>1,'msg_type'=> 1,'mark'=>1];
        $count = $this->model->where($where)->where('create_time','>=',time() - 86400)->count('id');
        RedisService::set($cacheKey, $count, rand(3,5));
        return $count;
    }
}