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- <?php
- namespace App\Services;
- use Illuminate\Support\Facades\Redis;
- use Cache;
- use DB;
- use App\{
- Follower,
- Profile,
- User
- };
- class FollowerService
- {
- const CACHE_KEY = 'pf:services:followers:';
- const FOLLOWING_KEY = 'pf:services:follow:following:id:';
- const FOLLOWERS_KEY = 'pf:services:follow:followers:id:';
- public static function add($actor, $target)
- {
- RelationshipService::refresh($actor, $target);
- Redis::zadd(self::FOLLOWING_KEY . $actor, $target, $target);
- Redis::zadd(self::FOLLOWERS_KEY . $target, $actor, $actor);
- }
- public static function remove($actor, $target)
- {
- RelationshipService::refresh($actor, $target);
- Redis::zrem(self::FOLLOWING_KEY . $actor, $target);
- Redis::zrem(self::FOLLOWERS_KEY . $target, $actor);
- Cache::forget('pf:services:follow:audience:' . $actor);
- Cache::forget('pf:services:follow:audience:' . $target);
- }
- public static function followers($id, $start = 0, $stop = 10)
- {
- return Redis::zrange(self::FOLLOWERS_KEY . $id, $start, $stop);
- }
- public static function following($id, $start = 0, $stop = 10)
- {
- return Redis::zrange(self::FOLLOWING_KEY . $id, $start, $stop);
- }
- public static function follows(string $actor, string $target)
- {
- return Follower::whereProfileId($actor)->whereFollowingId($target)->exists();
- }
- public static function audience($profile, $scope = null)
- {
- return (new self)->getAudienceInboxes($profile, $scope);
- }
- public static function softwareAudience($profile, $software = 'pixelfed')
- {
- return collect(self::audience($profile))
- ->filter(function($inbox) use($software) {
- $domain = parse_url($inbox, PHP_URL_HOST);
- if(!$domain) {
- return false;
- }
- return InstanceService::software($domain) === strtolower($software);
- })
- ->unique()
- ->values()
- ->toArray();
- }
- protected function getAudienceInboxes($pid, $scope = null)
- {
- $key = 'pf:services:follow:audience:' . $pid;
- return Cache::remember($key, 86400, function() use($pid) {
- $profile = Profile::find($pid);
- if(!$profile) {
- return [];
- }
- return $profile
- ->followers()
- ->whereLocalProfile(false)
- ->get()
- ->map(function($follow) {
- return $follow->sharedInbox ?? $follow->inbox_url;
- })
- ->unique()
- ->values()
- ->toArray();
- });
- }
- public static function mutualCount($pid, $mid)
- {
- return Cache::remember(self::CACHE_KEY . ':mutualcount:' . $pid . ':' . $mid, 3600, function() use($pid, $mid) {
- return DB::table('followers as u')
- ->join('followers as s', 'u.following_id', '=', 's.following_id')
- ->where('s.profile_id', $mid)
- ->where('u.profile_id', $pid)
- ->count();
- });
- }
- public static function mutualIds($pid, $mid, $limit = 3)
- {
- $key = self::CACHE_KEY . ':mutualids:' . $pid . ':' . $mid . ':limit_' . $limit;
- return Cache::remember($key, 3600, function() use($pid, $mid, $limit) {
- return DB::table('followers as u')
- ->join('followers as s', 'u.following_id', '=', 's.following_id')
- ->where('s.profile_id', $mid)
- ->where('u.profile_id', $pid)
- ->limit($limit)
- ->pluck('s.following_id')
- ->toArray();
- });
- }
- }
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