PHP结合redis实现点赞功能

"predis/predis": "^1.1",

<?php
/**
 * 点赞
 */

namespace app\like\service;

use app\common\DataService;
use app\common\Redis;

class LikeService
{
    const LIKE_TYPE_ALL = 4; //全部
    const LIKE_USER_GIVE_SHOW_CHINESENAME = '赞了您这条';
    const LIKE_USER_RECEIVE_SHOW_CHINESENAME = '我点赞了这条';
    const BLOG_CHINESENAME = '资讯';

    /**
     * 点赞资讯
     * @param int $userId 用户ID
     * @param int $blogId 资讯ID
     */
    public function addLikeBlog($userId, $blogId, $sys)
    {
        $blogInfo = $this->_getBlogInfo($blogId, $sys);
        if (!$blogInfo) return false;
        if ($blogInfo['author_id']) {
            //(资讯创建人)我收到点赞全部列表
            $key = $this->_getMyAllReceiveLikeListKey($blogInfo['author_id'], $sys);
            Redis::getInstance()->redisZadd($key, time(), $blogId . ':blog:' . $userId . ':likeuserid');
        }

        //资讯点赞列表
        $key = $this->_getBlogListKey($blogId, $sys);
        Redis::getInstance()->redisZadd($key, time(), $userId);

        //我的点赞资讯列表
        $key = $this->_getMyLikeBlogListKey($userId, $sys);
        Redis::getInstance()->redisZadd($key, time(), $blogId);

        //我发出点赞全部列表
        $key = $this->_getMyAllGiveLikeListKey($userId, $sys);
        Redis::getInstance()->redisZadd($key, time(), $blogId . ":blog");

        return true;
    }

    /**
     * 取消点赞资讯
     * @param int $userId 用户ID
     * @param int $BlogId 资讯ID
     */
    public function unLikeBlog($userId, $blogId, $sys)
    {
        $blogInfo = $this->_getBlogInfo($blogId, $sys);
        if (!$blogInfo) return false;
        if ($blogInfo['author_id']) {
            //(资讯创建人)我收到点赞全部列表
            $key = $this->_getMyAllReceiveLikeListKey($blogInfo['author_id'], $sys);
            Redis::getInstance()->redisZrem($key, $blogId . ':blog:' . $userId . ':likeuserid');
        }

        //资讯点赞列表
        $key = $this->_getBlogListKey($blogId, $sys);
        Redis::getInstance()->redisZrem($key, $userId);

        //我的点赞资讯列表
        $key = $this->_getMyLikeBlogListKey($userId, $sys);
        Redis::getInstance()->redisZrem($key, $blogId);

        //我的点赞全部列表
        $key = $this->_getMyAllGiveLikeListKey($userId, $sys);
        Redis::getInstance()->redisZrem($key, $blogId . ":blog");

        return true;
    }

    /**
     * 判断资讯是否被点赞
     * @param int $userId 登录用户ID
     * @param int $blogId 资讯ID
     */
    public function isLikeBlog($userId, $blogId, $sys)
    {
        $key = $this->_getMyLikeBlogListKey($userId, $sys);
        $score = Redis::getInstance()->redisZscore($key, $blogId);
        if (empty($score)) {
            return false;
        }
        return true;
    }

    /**
     * 获取资讯点赞数量
     */
    public function getBlogLikeCount($blogId, $sys)
    {
        $key = $this->_getBlogListKey($blogId, $sys);
        $count = (int)Redis::getInstance()->redisZcard($key);
        return ['count' => $count];
    }

    /**
     * 获取资讯评论点赞排序，从高到低排序
     * 返回排序好后评论id数组
     */
    public function getBlogCommentLikeSort($blogId, $sys)
    {
        $key = $this->_getCommentTypeListKey($blogId, 'blog', $sys);
        $list = Redis::getInstance()->redisZRevRange($key, 0, -1, ['WITHSCORES']);
        return $list;
    }

    /**
     * 获取我发出的点赞列表
     * @param int $type 1 帖子 2 资讯 3评论 4全部
     */
    public function getMyAllGiveLikeList($userId, $sys, $type, $pageNo = 1, $pageCount = 10)
    {
        switch ($type) {
            case self::LIKE_TYPE_BLOG:
                $key = $this->_getMyLikeBlogListKey($userId, $sys);
                break;
            default:
                $key = $this->_getMyAllGiveLikeListKey($userId, $sys);
                break;
        }
        $list = Redis::getInstance()->redisZRevRange($key, 0, -1);
        $list = isset($list['data']) ? $list['data'] : [];

        //只展示显示每页数量
        $result = array_slice($list, ($pageNo - 1) * $pageCount, $pageCount);
        $data = [];

        if ($type == self::LIKE_TYPE_ALL) {
            //获取全部信息
            foreach ($result as $k => $value) {
                $detail = explode(':', $value);
                //适应前端数据格式
                $score = Redis::getInstance()->redisZscore($key, $value);
                $likeTime = date("Y-m-d H:i:s", $score);
                $likeTime = DataService::getInstance()->_handleCreateTimeTwo($likeTime);
                $data[$k]['likeTime'] = $likeTime;
                $data[$k]['titleId'] = $detail[0];
                $data[$k]['commentId'] = 0;
                $data[$k]['comment'] = '';

                if (isset($detail[1]) && $detail[1] == 'blog') {
                    $blogInfo = $this->_getBlogInfo($detail[0], $sys);
                    $blogAuthorId = isset($blogInfo['author_id']) ? $blogInfo['author_id'] : 0;
                    $authorInfo = $this->_getAuthorInfo($blogAuthorId, $sys);

                    $data[$k]['sourceUserId'] = $blogAuthorId;
                    $data[$k]['sourceUserNickName'] = isset($authorInfo['author_name']) ? $authorInfo['author_name'] : '';
                    $data[$k]['sourceUserHeadimgurl'] = isset($authorInfo['author_headimgurl']) ? $authorInfo['author_headimgurl'] : '';
                    $data[$k]['likeShowName'] = self::LIKE_USER_RECEIVE_SHOW_CHINESENAME . self::BLOG_CHINESENAME;
                    //点赞来源类型id,1帖子2资讯
                    $data[$k]['likeSourceTypeId'] = self::LIKE_TYPE_BLOG;
                    $data[$k]['likeTypeName'] = self::BLOG_CHINESENAME;
                    $data[$k]['title'] = isset($blogInfo['title']) ? $blogInfo['title'] : '';
                    //评论创建者信息设置为空
                    $data[$k]['commentUserId'] = 0;
                    $data[$k]['commentUserNickName'] = '';
                    $data[$k]['commentUserHeadimgurl'] = '';
                }

            }
        }

        $count = count($data);
        $pagerInfo = [
            "total" => $count,
            "page_no" => $pageNo,
            "page_count" => $pageCount,
            "page_total" => ceil($count / $pageCount)
        ];

        return ["code" => _MSG_SYSTEM_SUCCESS, "msg" => "查询成功", "data" => ["page_info" => $pagerInfo, "list" => $data]];
    }

    /**
     * 获取我收到的点赞列表
     * @param int $type 1 帖子 2 资讯 3评论 4全部
     */
    public function getMyAllReceiveLikeList($userId, $sys, $type, $pageNo = 1, $pageCount = 10)
    {
        switch ($type) {
            case self::LIKE_TYPE_BLOG:
                $key = $this->_getMyLikeBlogListKey($userId, $sys);
                break;
            default:
                $key = $this->_getMyAllReceiveLikeListKey($userId, $sys);
                break;
        }

        $list = Redis::getInstance()->redisZRevRange($key, 0, -1);
        $list = isset($list['data']) ? $list['data'] : [];

        //只展示显示每页数量
        $result = array_slice($list, ($pageNo - 1) * $pageCount, $pageCount);
        $data = [];

        if ($type == self::LIKE_TYPE_ALL) {
            //获取全部信息
            foreach ($result as $k => $value) {
                $detail = explode(':', $value);
                //适应前端数据格式
                $score = Redis::getInstance()->redisZscore($key, $value);
                $likeTime = date("Y-m-d H:i:s", $score);
                $likeTime = DataService::getInstance()->_handleCreateTimeTwo($likeTime);
                $data[$k]['likeTime'] = $likeTime;
                $data[$k]['titleId'] = $detail[0];
                $data[$k]['commentId'] = 0;
                $data[$k]['comment'] = '';

                if (isset($detail[1]) && $detail[1] == 'blog') {
                    $blogInfo = $this->_getBlogInfo($detail[0], $sys);
                    $blogAuthorId = isset($blogInfo['author_id']) ? $blogInfo['author_id'] : 0;
                    $authorInfo = $this->_getAuthorInfo($blogAuthorId, $sys);

                    $data[$k]['sourceUserId'] = $blogAuthorId;
                    $data[$k]['sourceUserNickName'] = isset($authorInfo['author_name']) ? $authorInfo['author_name'] : '';
                    $data[$k]['sourceUserHeadimgurl'] = isset($authorInfo['author_headimgurl']) ? $authorInfo['author_headimgurl'] : '';
                    $data[$k]['likeShowName'] = self::LIKE_USER_GIVE_SHOW_CHINESENAME . self::BLOG_CHINESENAME;
                    //点赞来源类型id,1帖子2资讯
                    $data[$k]['likeSourceTypeId'] = self::LIKE_TYPE_BLOG;
                    $data[$k]['likeTypeName'] = self::BLOG_CHINESENAME;
                    $data[$k]['title'] = isset($blogInfo['title']) ? $blogInfo['title'] : '';
                    //评论创建者信息
                    $data[$k]['commentUserId'] = 0;
                    $data[$k]['commentUserNickName'] = '';
                    $data[$k]['commentUserHeadimgurl'] = '';
                }

                //点赞者信息
                $userInfo = $this->_getUserInfo($detail[2], $sys);
                $data[$k]['userId'] = $detail[2];
                $data[$k]['userNickName'] = isset($userInfo['nickname']) ? $userInfo['nickname'] : '';
                $data[$k]['userHeadimgurl'] = isset($userInfo['headimgurl']) ? $userInfo['headimgurl'] : '';
            }
        }

        $count = count($data);
        $pagerInfo = [
            "total" => $count,
            "page_no" => $pageNo,
            "page_count" => $pageCount,
            "page_total" => ceil($count / $pageCount)
        ];

        return ["code" => _MSG_SYSTEM_SUCCESS, "msg" => "查询成功", "data" => ["page_info" => $pagerInfo, "list" => $data]];
    }

    /**
     * 获取资讯点赞列表的key
     */
    private function _getBlogListKey($blogId, $sys)
    {
        return "Like:{$sys}:blog:{$blogId}";
    }

    /**
     * 获取我的点赞资讯的key
     */
    private function _getMyLikeBlogListKey($userId, $sys)
    {
        return "Like:{$sys}:users:blogs:{$userId}";
    }


    /**
     * 获取我的全部发出点赞列表的key
     * Like:343:users:all:give:1
     * 在343系统下用户id=1全部发出点赞列表(value=2:blog(文章id为2),score=time时间戳)
     */
    private function _getMyAllGiveLikeListKey($userId, $sys)
    {
        return "Like:{$sys}:users:all:give:{$userId}";
    }

    /**
     * 获取我的全部收到点赞列表的key
     * Like:343:users:all:receive:1
     * 在343系统下用户id=1全部收到点赞列表(value=2:blog(文章id为2),score=time时间戳)
     */
    private function _getMyAllReceiveLikeListKey($userId, $sys)
    {
        return "Like:{$sys}:users:all:receive:{$userId}";
    }


    /**
     * 获取资讯信息
     */
    private function _getBlogInfo($blogId, $sys)
    {
        if (empty($blogId)) {
            return [];
        }

        $blogInfo = BlogInstanceModel::getInstance()->getOneById($blogId, $sys);

        return $blogInfo['data'];
    }

}
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