feat : rank

app/Cache/Redis/Api/EvaluationCache.php

@@ -0,0 +1,57 @@
+<?php
+
+namespace App\Cache\Redis\Api;
+
+use App\Cache\Redis\RedisCache;
+use Hyperf\Di\Annotation\Inject;
+use Psr\Container\ContainerExceptionInterface;
+use Psr\Container\NotFoundExceptionInterface;
+
+class EvaluationCache
+{
+    /**
+     * @var RedisCache
+     */
+    #[Inject]
+    protected RedisCache $redis;
+
+    /**
+     * @param int $chefId
+     * @param int $score
+     * @return void
+     * @throws ContainerExceptionInterface
+     * @throws NotFoundExceptionInterface
+     */
+    public function addChefEvaluation(int $chefId,int $score): void
+    {
+        $key = ApiRedisKey::chefEvaluationKey($chefId);
+
+        $this->redis->hIncrBy($key, 'total_score', $score);
+        $this->redis->hIncrBy($key, 'total_count', 1);
+    }
+
+    /**
+     * @param int $chefId
+     * @return float|int
+     * @throws ContainerExceptionInterface
+     * @throws NotFoundExceptionInterface
+     */
+    public function getChefEvaluation(int $chefId): float|int
+    {
+        $key = ApiRedisKey::chefEvaluationKey($chefId);
+
+        $totalScore = $this->redis->hGet($key, 'total_score');
+        $totalCount = $this->redis->hGet($key, 'total_count');
+
+        if (empty($totalScore) || empty($totalCount)) return 0;
+
+        $avgScore = $totalScore / $totalCount;
+
+        if ($avgScore < 4) {
+            $normalized = $avgScore / 4;
+            $avgScore = 4 + 1 - exp(-2 * $normalized);
+        }
+
+        return round($avgScore,1);
+    }
+}