原文：/laowenBlog/p/14192070.html
产品价值
应用场景
在做PC或者APP端时，掺杂点社交概念就有关注和粉丝功能;
数据量小的话数据库还能支持，如果数据量很庞大还是用缓存比较好。
具体实现
1 控制层实现
/**
* 关注/取消关注
* @param Request $request
* @return mixed
*/
public function follow(Request $request)
{
$type = $request->input('type', 'follow'); // 1-关注-follow 2-取消关注-remove
$userId = $request->input('user_id', 0); // 我的用户ID
$otherId = $request->input('other_id', 0); // 我关注的用户ID
if ($userId == $otherId) {
return $this->response->apiResponse();
}
$this->testFollowService->follow($type, $userId, $otherId);
return $this->response->apiResponse();
}
/**
* 我的关注/粉丝
* @param Request $request
* @return mixed
*/
public function myFollowAndFans(Request $request)
{
$type = $request->input('type', 'follow'); // 1-关注-follow 2-粉丝-fans
$userId = $request->input('user_id', 0); // 我的用户ID
$page = $request->input('page', 1); // 页码
$limit = $request->input('limit', 10); // 每页显示条数
$res = $this->testFollowService->myFollowAndFans($userId, $type, $page, $limit);
return $this->response->apiResponse($res);
}
2 服务层实现
/**
* 关注/取消关注
* @param string $type
* @param int $userId
* @param int $otherId
* @return mixed
*/
public function follow($type = 'follow', int $userId, int $otherId)
{
// 关注
if ($type === 'follow') {
$this->testFollowRedis->zAddFollow($userId, $otherId);
$this->testFollowRedis->zAddFans($otherId, $userId);
}
// 取消关注
if ($type === 'remove') {
$this->testFollowRedis->zRemFollow($userId, $otherId);
$this->testFollowRedis->zRemFans($otherId, $userId);
}
}
/**
* 我的关注/粉丝
* @param int $userId 当前登录用户的ID
* @param string $type 要获取的数据
* @param int $page 页码
* @param int $limit 限制条数
* @return array
*/
public function myFollowAndFans(int $userId, $type = 'follow', $page = 1, $limit = 10)
{
$start = $limit * ($page - 1);
$end = $start + $limit - 1;
$res = [];
if ($type === 'follow') {
$res = $this->testFollowRedis->zRangeFollow($userId, $start, $end);
}
if ($type === 'fans') {
$res = $this->testFollowRedis->zRangeFans($userId, $start, $end);
}
return $res;
}
仓储层实现
namespace App\Repository\Redis;
class TestFollowRedis extends AbstractRedis
{
/**
* 关注key
* @var string
*/
private $followKey = '%u:follow';
/**
* 粉丝key
* @var string
*/
private $fansKey = '%u:fans';
/**
* 前缀
*/
public function initPrefix()
{
return 'follow:';
}
/**
* 增加关注
* @param $userId
* @param $otherId
* @author ptg /12/9 5:55 下午
*/
public function zAddFollow($userId, $otherId)
{
$this->redis->zAdd(sprintf($this->prefix . $this->followKey, $userId), time(), $otherId);
}
/**
* 取消关注
* @param $userId
* @param $otherId
* @author ptg /12/9 5:55 下午
*/
public function zRemFollow($userId, $otherId)
{
$this->redis->zRem(sprintf($this->prefix . $this->followKey, $userId), $otherId);
}
/**
* 我的关注 | 正序
* @param int $userId
* @param int $start
* @param int $end
* @return array
* @author ptg /12/9 7:57 下午
*/
public function zRangeFollow(int $userId, int $start = 0, int $end = 9)
{
return $this->redis->zRange(sprintf($this->prefix . $this->followKey, $userId), $start, $end);
}
/**
* 我的关注 | 倒序
* @param int $userId
* @param int $start
* @param int $end
* @return array
* @author ptg /12/9 7:57 下午
*/
public function zRevRangeFollow(int $userId, int $start = 0, int $end = 9)
{
return $this->redis->zRevRange(sprintf($this->prefix . $this->followKey, $userId), $start, $end);
}
/**
* 增加粉丝
* @param $userId
* @param $otherId
* @author ptg /12/9 6:27 下午
*/
public function zAddFans($userId, $otherId)
{
$this->redis->zAdd(sprintf($this->prefix . $this->fansKey, $userId), time(), $otherId);
}
/**
* 移除粉丝
* @param $userId
* @param $otherId
* @author ptg /12/9 6:27 下午
*/
public function zRemFans($userId, $otherId)
{
$this->redis->zRem(sprintf($this->prefix . $this->fansKey, $userId), $otherId);
}
/**
* 我的粉丝 | 正序
* @param int $userId
* @param int $start
* @param int $end
* @return array
* @author ptg /12/9 7:56 下午
*/
public function zRangeFans(int $userId, int $start = 0, int $end = 9)
{
return $this->redis->zRange(sprintf($this->prefix . $this->fansKey, $userId), $start, $end);
}
/**
* 我的粉丝 | 倒序
* @param int $userId
* @param int $start
* @param int $end
* @return array
* @author ptg /12/9 7:56 下午
*/
public function zRevRangeFans(int $userId, int $start = 0, int $end = 9)
{
return $this->redis->zRevRange(sprintf($this->prefix . $this->fansKey, $userId), $start, $end);
}
}
