Add ProfileStatusService

app/Services/ProfileStatusService.php

@@ -0,0 +1,66 @@
+<?php
+
+namespace App\Services;
+
+use DB;
+use Illuminate\Support\Facades\Redis;
+
+class ProfileStatusService
+{
+    const CACHE_KEY = 'pf:services:profile-statuses:ids:';
+    const COLD_CHECK_KEY = 'pf:services:profile-statuses:id-ttl:';
+    const FALLOFF_LIMIT = 40;
+
+    public static function get($id, $start = 0, $stop = 8)
+    {
+        $key = self::CACHE_KEY . $id;
+        if(!Redis::zscore(self::COLD_CHECK_KEY, $id)) {
+            $res = self::coldFetch($id);
+            if($res && count($res)) {
+                return array_slice($res, $start, $stop);
+            }
+        }
+        $ids = Redis::zrevrange($key, $start, $stop - 1);
+        return $ids;
+    }
+
+    public static function count($id)
+    {
+        return Redis::zcount(self::CACHE_KEY . $id, '-inf', '+inf');
+    }
+
+    public static function add($pid, $sid)
+    {
+        if(self::count($pid) > self::FALLOFF_LIMIT) {
+            Redis::zpopmin(self::CACHE_KEY . $pid);
+        }
+        return Redis::zadd(self::CACHE_KEY . $pid, $sid, $sid);
+    }
+
+    public static function delete($pid, $sid)
+    {
+        return Redis::zrem(self::CACHE_KEY . $pid, $sid);
+    }
+
+    public static function coldFetch($pid)
+    {
+        Redis::del(self::CACHE_KEY . $pid);
+        $ids = DB::table('statuses')
+            ->select('id', 'profile_id', 'type', 'scope')
+            ->whereIn('type', ['photo', 'photo:album', 'video'])
+            ->whereIn('scope', ['public', 'unlisted'])
+            ->whereProfileId($pid)
+            ->orderByDesc('id')
+            ->limit(self::FALLOFF_LIMIT)
+            ->pluck('id')
+            ->toArray();
+
+        if($ids && count($ids)) {
+            foreach($ids as $id) {
+                self::add($pid, $id);
+            }
+        }
+        Redis::zadd(self::COLD_CHECK_KEY, $pid, $pid);
+        return $ids;
+    }
+}