first

backend/internal/platform/redis/redis.go

@@ -0,0 +1,28 @@
+// Package redis provides the Redis client used for refresh-token/session state.
+package redis
+
+import (
+	"context"
+	"fmt"
+	"time"
+
+	"github.com/redis/go-redis/v9"
+)
+
+func Connect(redisURL string) (*redis.Client, error) {
+	opt, err := redis.ParseURL(redisURL)
+	if err != nil {
+		return nil, fmt.Errorf("parse redis url: %w", err)
+	}
+
+	client := redis.NewClient(opt)
+
+	ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
+	defer cancel()
+
+	if err := client.Ping(ctx).Err(); err != nil {
+		return nil, fmt.Errorf("ping redis: %w", err)
+	}
+
+	return client, nil
+}