/**
* 可能认识的人 (可能认识的人 = 有相同tag的用户 || 所在城市相同的用户 || 好友的好友 || 我的粉丝 || 随机推荐)
*
* 注意: 因为头像信息未保存数据库, 所以当开启"隐藏无头像的用户"时, 结果集数量可能小于$max
*
* @param int $uid 用户ID
* @param int $max 获取的最大人数
* @param boolean $do_shuffle 是否随机次序 (默认:true)
* @return boolean|array 用户ID的数组
*/
public function getRelatedUser($uid, $max = 100, $do_shuffle = true)
{
if (($uid = intval($uid)) <= 0) {
return false;
}
// 权重设置
$config = model('Xdata')->lget('related_user');
$tag_weight = isset($config['tag_weight']) ? intval($config['tag_weight']) : 4;
// 拥有相同Tag
$city_weight = isset($config['city_weight']) ? intval($config['city_weight']) : 3;
// 设置的城市相同
$friend_weight = isset($config['friend_weight']) ? intval($config['friend_weight']) : 2;
// 好友的好友
$follower_weight = isset($config['follower_weight']) ? intval($config['follower_weight']) : 1;
// 我的粉丝
$total_weight = $tag_weight + $city_weight + $friend_weight + $follower_weight;
// 是否隐藏无头像的用户
$hide_no_avatar = $config['hide_no_avatar'];
// 权重对应的数量
$tag_count = intval($tag_weight / $total_weight * $max);
$city_count = intval($city_weight / $total_weight * $max);
$friend_count = intval($friend_weight / $total_weight * $max);
$follower_count = intval($follower_weight / $total_weight * $max);
$related_uids = array();
// 按Tag
if ($tag_count > 0) {
$tag_uids = $this->_getRelatedUserFromTag($uid, $related_uids, $tag_count);
$related_uids = array_merge($related_uids, $tag_uids);
}
// 按设置的城市
if ($city_count > 0) {
$limit = $city_count + ($tag_count - count($related_uids));
$city_uids = $this->_getRelatedUserFromCity($uid, $related_uids, $limit);
$related_uids = array_merge($related_uids, $city_uids);
}
// 按好友的好友
if ($friend_count > 0) {
$limit = $friend_count + ($tag_count + $city_count - count($related_uids));
$friend_uids = $this->_getRelatedUserFromFriend($uid, $related_uids, $limit);
$related_uids = array_merge($related_uids, $friend_uids);
}
// 按粉丝
if ($follower_count > 0) {
$limit = $follower_count + ($tag_count + $city_count + $friend_count - count($related_uids));
$follower_uids = $this->_getRelatedUserFromFollower($uid, $related_uids, $limit);
$related_uids = array_merge($related_uids, $follower_uids);
}
// 随机推荐
$limit = $max - count($related_uids);
$random_uids = $this->_getRandomRelatedUser($uid, $related_uids, $limit);
$related_uids = array_merge($related_uids, $random_uids);
// 按"好友的好友"推荐时, 可能会产生重复用户
$related_uids = array_unique($related_uids);
// 添加推荐原因
foreach ($related_uids as $k => $v) {
if ($hide_no_avatar && !hasUserFace($v)) {
unset($related_uids[$k]);
continue;
}
if (in_array($v, $tag_uids)) {
$related_uids[$k] = array('uid' => $v, 'reason' => 'Tag相同');
} else {
if (in_array($v, $city_uids)) {
$related_uids[$k] = array('uid' => $v, 'reason' => '城市相同');
} else {
if (in_array($v, $friend_uids)) {
$related_uids[$k] = array('uid' => $v, 'reason' => '好友的好友');
} else {
if (in_array($v, $follower_uids)) {
$related_uids[$k] = array('uid' => $v, 'reason' => '您的粉丝');
} else {
if (in_array($v, $random_uids)) {
$related_uids[$k] = array('uid' => $v, 'reason' => '随机推荐');
}
}
}
}
}
}
if ($do_shuffle) {
shuffle($related_uids);
}
return $related_uids;
}
/**
* 获取粉丝数最多的前N个用户
*
* <p>当指定uid时, 该uid已关注的用户将被剔除. 注意: 数据量大时本操作较耗资源, 且结果集不会被缓存.</p>
* <p>不指定uid时, 返回全站的粉丝排行榜, 该排行榜会缓存1小时.</p>
* <p>当$hide_no_avatar为true时, 为了保证结果集数量, 实际查询的数量是3倍的$count, 然后再顺次剔除无头像的用户,
* 所以最终结果集的数量可能会小于$count.</p>
*
* @param boolean $uid 用户ID
* @param int $count 结果数 (默认:10)
* @param null|boolean $hide_auto_friend 是否剔除默认关注的用户 (null时使用系统默认配置)
* @param null|boolean $hide_no_avatar 是否剔除无头像的用户 (null时使用系统默认配置)
* @return array
*/
public function getTopFollowerUser($uid = 0, $count = 10, $hide_auto_friend = null, $hide_no_avatar = null)
{
// 未指定参数时, 加载系统配置
$config = model('Xdata')->lget('top_follower');
!isset($hide_auto_friend) && ($hide_auto_friend = intval($config['hide_auto_friend']));
!isset($hide_no_avatar) && ($hide_no_avatar = intval($config['hide_no_avatar']));
$uid = intval($uid);
$count = intval($count);
$limit = 0;
// 查询的结果数
$following = array();
// 已关注的用户
$top_user = array();
// 最终结果
if ($uid > 0) {
$following = $this->query($this->getNowFollowingSql($uid));
$following = getSubByKey($following, 'fid');
$following = array_merge($following, array($uid));
// 自己不出现在最终结果中
$limit += count($following);
}
$cache_id = '_weibo_top_followed_' . $count . '_' . intval($hide_auto_friend) . intval($hide_no_avatar);
$cache_tid = '_weibo_top_followed_t_' . $count . '_' . intval($hide_auto_friend) . intval($hide_no_avatar);
if ($uid == 0) {
// 缓存有效时间: 1 Hour
$expire = 1 * 3600;
if (($cache = S($cache_id)) === false) {
S($cache_tid, time());
//缓存未设置 先设置缓存设定时间
} else {
if (($cacheSetTime = S($cache_tid)) === false || $cacheSetTime + $expire <= time()) {
S($cache_tid, time());
//缓存未设置 先设置缓存设定时间
} else {
return $cache;
}
}
}
if ($uid > 0 || ($top_user = S($cache_id)) === false) {
// 隐藏无头像用户时, 为了保证最后结果满足$limit, 查询时使用3倍的$limit
$limit += $hide_no_avatar ? $count * 3 : $count;
$where = 'WHERE `type` = 0 ';
if ($hide_auto_friend) {
// 隐藏默认关注的用户时
$auto_friend = model('Xdata')->get('register:register_auto_friend');
$auto_friend = explode(',', $auto_friend);
if (count($auto_friend) > 1) {
$where .= 'AND `fid` NOT IN ( ' . implode(',', $auto_friend) . ' )';
}
}
$sql = "SELECT `fid` AS `uid`, count(`uid`) AS `count` FROM {$this->tablePrefix}weibo_follow " . $where . " GROUP BY `fid` " . "ORDER BY `count` DESC LIMIT {$limit}";
$res = $this->query($sql);
$res = $res ? $res : array();
if (!empty($res)) {
// 过滤
$index = 1;
$noPic = array();
foreach ($res as $k => $v) {
if ($index > $count) {
break;
} else {
if ($hide_no_avatar && !hasUserFace($v['uid'])) {
// 剔除无头像的用户
$noPic[] = $v;
unset($res[$k]);
continue;
} else {
if ($uid > 0 && in_array($v['uid'], $following)) {
// 剔除已关注的用户
unset($res[$k]);
continue;
}
}
}
$top_user[] = $v;
++$index;
}
}
unset($res);
if (empty($top_user) && !empty($noPic)) {
$top_user = $noPic;
}
if ($uid <= 0) {
S($cache_id, empty($top_user) ? array() : $top_user);
}
}
return $top_user;
}
