Redis如何实现微博关注关系

"findSet" => $findSet, //要查询的集合 
"fofaSet" => $fofaSet, //互粉的集合 
"findInterFollowSet" => $findInterFollowSet, //要查询的集合与我的关注交 
"findInterFansSet" => $findInterFansSet //要查询的集的与我的粉丝交 

/* 
* userID:当前用户id 
* targetUserID: 被查看的人的id 
* findType: 查看的是哪个列表 
* findStart: 分页查看的列表开始的位置 
* findEnd: 分页查看的列表结束的位置 
*/ 
function getChunkSets($redis, $userID, $targetUserID, $findType, $findStart, $findEnd) { 
 
 $fansKey = "fans:" . $userID; 
 $followKey = "follow:" . $userID; 
 $findKey = "find:" . $userID; 
 
 $targetKey = $findType. ":" . $targetUserID; 
 $fofaKey = "find_inter_fofa:" . $userID; 
 
 $findInterFollowKey = "find_inter_follow:" . $userID; 
 $findInterFansKey = "find_inter_fans:" . $userID; 
 
 //找出要查询的集合元素 
 $findSet = $redis->zRevRange($targetKey, $findStart, $findEnd, TRUE); 
 
 //要查询的集合与我的关注交 
 $findInterFollowSet = array(); 
 
 //要查询的集的与我的粉丝交 
 $findInterFansSet = array(); 
 
 //先清掉临时集合 
 $redis->del($findKey); 
 
 $redis->del($fofaKey); 
 $redis->del($findInterFollowKey); 
 $redis->del($findInterFansKey); 
 
 
 //存起来 
 foreach ($findSet as $uid => $score) { 
  $redis->zAdd($findKey, $score, $uid); 
 } 
 
 //求互粉集合 
 if ($userID != $targetUserID) { //看别人 
  $redis->zInter($fofaKey, array($findKey, $fansKey, $followKey)); 
 
  /* 
  * 如果不是看自己的列表，还要求 
  * 1： 要查询的集合与我的关注交 
  * 2： 要查询的集的与我的粉丝交 
  */ 
  $redis->zInter($findInterFollowKey, array($findKey, $followKey)); 
  $redis->zInter($findInterFansKey, array($findKey, $fansKey)); 
 
  $findInterFollowSet = $redis->zRevRange($findInterFollowKey, 0, -1); 
  $findInterFansSet = $redis->zRevRange($findInterFansKey, 0, -1); 
 
 } else { 
  if ($findType == "fans") { //自己看粉丝列表 
  $redis->zInter($fofaKey, array($findKey, $followKey)); 
  } else if ($findType == "follow") { //看自己关注列表 
  $redis->zInter($fofaKey, array($findKey, $fansKey)); 
  } 
 } 
 
 //互粉集合 
 $fofaSet = $redis->zRevRange($fofaKey, 0, -1); 
 
 return array( 
  "findSet" => $findSet, //要查询的集合 
  "fofaSet" => $fofaSet, //互粉的集合 
  "findInterFollowSet" => $findInterFollowSet, //要查询的集合与我的关注交 
  "findInterFansSet" => $findInterFansSet //要查询的集的与我的粉丝交 
 ); 
 } 

/* 
* isSelf: 是否查看自己的列表 
* findType: 查看的是粉丝还是关注列表 1： 关注， 2: 粉丝 
* userInfoArr: 用户详细信息数组 
*/ 
function getUserInfoList($isSelf, $findType, $userInfoArr, $findSet, $fofaSet, $interFansSet, $interFollowSet) { 
 
 $userInfoList = array(); 
 
 foreach($findSet as $userID => $favoTime) { 
  if(!in_array($userID, array_keys($userInfoArr))) continue; 
 
  $userInfo = new UserInfo($userInfoArr[$userID]); 
  $userInfo = $userInfo->format(); 
 
  if(in_array($userID, $fofaSet)){ 
  $userInfo['favoFlag'] = 3; //互相关注 
  } else { 
  if($isSelf) { 
   $userInfo['favoFlag'] = $findType; 
  } else { 
   if(in_array($userID, $interFansSet)) { 
   $userInfo['favoFlag'] = 2; //我的粉丝 
   } else if(in_array($userID, $interFollowSet)) { 
   $userInfo['favoFlag'] = 1; //我的关注 
   } else{ 
   $userInfo['favoFlag'] = 0; //无关系 
   } 
  } 
   
  } 
 
  $userInfo['favoTime'] = $favoTime; 
  array_push($userInfoList, $userInfo); 
 } 
 
 return $userInfoList; 
 }