Add LikeService

app/Services/LikeService.php

@@ -0,0 +1,65 @@
+<?php
+
+namespace App\Services;
+
+use App\Util\ActivityPub\Helpers;
+use Illuminate\Support\Facades\Redis;
+use App\Like;
+
+class LikeService {
+
+	const CACHE_KEY = 'pf:services:likes:ids:';
+
+	public static function getUser($profile_id)
+	{
+		return self::get($profile_id);
+	}
+
+	protected static function get($profile_id)
+	{
+		$key = self::CACHE_KEY . $profile_id;
+		if(Redis::zcard($key) == 0) {
+			self::warmCache($profile_id);
+		} else {
+			return Redis::zrevrange($key, 0, 40);
+		}
+	}
+
+	protected static function set($profile_id, $status_id)
+	{
+		$key = self::CACHE_KEY . $profile_id;
+		Redis::zadd($key, $status_id, $status_id);
+	}
+
+	public static function warmCache($profile_id)
+	{
+		Like::select('id', 'profile_id', 'status_id')
+			->whereProfileId($profile_id)
+			->latest()
+			->get()
+			->each(function($like) use ($profile_id) {
+				self::set($profile_id, $like->status_id);
+			});
+	}
+
+	public static function liked($profileId, $statusId)
+	{
+		$key = self::CACHE_KEY . $profileId;
+		return (bool) Redis::zrank($key, $statusId);
+	}
+
+	public static function likedBy($status)
+	{
+		if(!$status->likes_count) {
+			return [
+				'username' => null,
+				'others' => false
+			];
+		}
+		$id = Like::whereStatusId($status->id)->first()->profile_id;
+		return [
+			'username' => ProfileService::get($id)['username'],
+			'others' => $status->likes_count >= 5,
+		];
+	}
+}