php + redis 實現關注功能

產品價值

1: 關注功能
2: 功能分析之「關注」功能
3: 平平無奇的「關注」功能，背後有4點重大價值

應用場景

在作PC或者APP端時，摻雜點社交概念就有關注和粉絲功能;
數據量小的話數據庫還能支持，若是數據量很龐大仍是用緩存比較好。

具體實現

1 控制層實現

<?php

namespace App\Controller\Test;

use App\Controller\AbstractController;
use App\Service\Ptg\TestFollowService;
use Hyperf\Di\Annotation\Inject;
use Hyperf\HttpServer\Annotation\Controller;
use Hyperf\HttpServer\Annotation\Middleware;
use Hyperf\HttpServer\Annotation\RequestMapping;

/**
 * 測試 - 關注
 * Class TestFollowController
 * @package App\Controller
 * @Controller(prefix="test")
 */
class TestFollowController extends AbstractController
{
    /**
     * 服務層 - 關注
     * @Inject()
     * @var TestFollowService
     */
    protected $testFollowService;

    /**
     * 關注/取消關注
     * @param Request $request
     * @return mixed
     */
    public function follow(Request $request)
    {
        $type = $request->input('type', 'follow');         // 1-關注-follow 2-取消關注-remove
        $userId = $request->input('user_id', 0);    // 個人用戶ID
        $otherId = $request->input('other_id', 0);  // 我關注的用戶ID
        if ($userId == $otherId) {
            return $this->response->apiResponse();
        }
        $this->testFollowService->follow($type, $userId, $otherId);
        return $this->response->apiResponse();
    }

    /**
     * 個人關注/粉絲
     * @param Request $request
     * @return mixed
     */
    public function myFollowAndFans(Request $request)
    {
        $type = $request->input('type', 'follow');  // 1-關注-follow 2-粉絲-fans
        $userId = $request->input('user_id', 0);    // 個人用戶ID
        $page = $request->input('page', 1);         // 頁碼
        $limit = $request->input('limit', 10);      // 每頁顯示條數
        $res = $this->testFollowService->myFollowAndFans($userId, $type, $page, $limit);
        return $this->response->apiResponse($res);
    }
}
?>

2 服務層實現

<?php

namespace App\Service\Ptg;

use App\Repository\Redis\TestFollowRedis;
use App\Service\AbstractService;
use Hyperf\Di\Annotation\Inject;

class TestFollowService extends AbstractService
{
    /**
     * 倉儲層 - 關注
     * @Inject()
     * @var TestFollowRedis
     */
    protected $testFollowRedis;

    /**
     * 關注/取消關注
     * @param string $type
     * @param int $userId
     * @param int $otherId
     * @return mixed
     */
    public function follow($type = 'follow', int $userId, int $otherId)
    {
        // 關注
        if ($type === 'follow') {
            // 先處理 mysql
            // TODO mysql 操做
            // 而後處理 redis
            $this->testFollowRedis->zAddFollow($userId, $otherId);
            $this->testFollowRedis->zAddFans($otherId, $userId);
        }
        // 取消關注
        if ($type === 'remove') {
            // 先處理 mysql
            // TODO mysql 操做
            // 而後處理 redis
            $this->testFollowRedis->zRemFollow($userId, $otherId);
            $this->testFollowRedis->zRemFans($otherId, $userId);
        }
    }

    /**
     * 個人關注/粉絲
     * @param int $userId 當前登陸用戶的ID
     * @param string $type 要獲取的數據
     * @param int $page 頁碼
     * @param int $limit 限制條數
     * @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;
    }
}
?>

倉儲層實現

<?php

namespace App\Repository\Redis;

class TestFollowRedis extends AbstractRedis
{
    /**
     * 關注key
     * @var string
     */
    private $followKey = '%u:follow';

    /**
     * 粉絲key
     * @var string
     */
    private $fansKey = '%u:fans';

    /**
     * 前綴
     */
    public function initPrefix()
    {
        return 'follow:';
    }

    /**
     * 增長關注
     * @param $userId
     * @param $otherId
     */
    public function zAddFollow($userId, $otherId)
    {
        $this->redis->zAdd(sprintf($this->prefix . $this->followKey, $userId), time(), $otherId);
    }

    /**
     * 取消關注
     * @param $userId
     * @param $otherId
     */
    public function zRemFollow($userId, $otherId)
    {
        $this->redis->zRem(sprintf($this->prefix . $this->followKey, $userId), $otherId);
    }

    /**
     * 個人關注 | 正序
     * @param int $userId
     * @param int $start
     * @param int $end
     * @return array
     */
    public function zRangeFollow(int $userId, int $start = 0, int $end = 9)
    {
        return $this->redis->zRange(sprintf($this->prefix . $this->followKey, $userId), $start, $end);
    }

    /**
     * 個人關注 | 倒序
     * @param int $userId
     * @param int $start
     * @param int $end
     * @return array
     */
    public function zRevRangeFollow(int $userId, int $start = 0, int $end = 9)
    {
        return $this->redis->zRevRange(sprintf($this->prefix . $this->followKey, $userId), $start, $end);
    }

    /**
     * 增長粉絲
     * @param $userId
     * @param $otherId
     */
    public function zAddFans($userId, $otherId)
    {
        $this->redis->zAdd(sprintf($this->prefix . $this->fansKey, $userId), time(), $otherId);
    }

    /**
     * 移除粉絲
     * @param $userId
     * @param $otherId
     */
    public function zRemFans($userId, $otherId)
    {
        $this->redis->zRem(sprintf($this->prefix . $this->fansKey, $userId), $otherId);
    }

    /**
     * 個人粉絲 | 正序
     * @param int $userId
     * @param int $start
     * @param int $end
     * @return array
     */
    public function zRangeFans(int $userId, int $start = 0, int $end = 9)
    {
        return $this->redis->zRange(sprintf($this->prefix . $this->fansKey, $userId), $start, $end);
    }

    /**
     * 個人粉絲 | 倒序
     * @param int $userId
     * @param int $start
     * @param int $end
     * @return array
     */
    public function zRevRangeFans(int $userId, int $start = 0, int $end = 9)
    {
        return $this->redis->zRevRange(sprintf($this->prefix . $this->fansKey, $userId), $start, $end);
    }
}