SMS 발송 및 Redis 기반 인증 코드 검증, JWT 발급 기능 구현

backend/internal/service/redis_service.go

@@ -0,0 +1,62 @@
+package service
+
+import (
+	"context"
+	"os"
+	"time"
+
+	"github.com/go-redis/redis/v8"
+)
+
+var ctx = context.Background()
+
+type RedisService struct {
+	Client *redis.Client
+}
+
+// NewRedisService creates and returns a new RedisService
+func NewRedisService() (*RedisService, error) {
+	redisAddr := os.Getenv("REDIS_ADDR")
+	if redisAddr == "" {
+		redisAddr = "localhost:6379" // Fallback for local dev without Docker
+	}
+
+	rdb := redis.NewClient(&redis.Options{
+		Addr: redisAddr,
+	})
+
+	// Ping the server to check the connection
+	if _, err := rdb.Ping(ctx).Result(); err != nil {
+		return nil, err
+	}
+
+	return &RedisService{Client: rdb}, nil
+}
+
+// StoreVerificationCode saves the SMS verification code with a 3-minute expiration
+func (s *RedisService) StoreVerificationCode(phone, code string) error {
+	// Key format: "sms_verify:01012345678"
+	key := "sms_verify:" + phone
+	expiration := 3 * time.Minute
+	err := s.Client.Set(ctx, key, code, expiration).Err()
+	return err
+}
+
+// GetVerificationCode retrieves the SMS verification code
+func (s *RedisService) GetVerificationCode(phone string) (string, error) {
+	key := "sms_verify:" + phone
+	code, err := s.Client.Get(ctx, key).Result()
+	if err == redis.Nil {
+		// Key does not exist (expired or incorrect phone number)
+		return "", nil
+	} else if err != nil {
+		return "", err
+	}
+	return code, nil
+}
+
+// DeleteVerificationCode removes the verification code after successful verification
+func (s *RedisService) DeleteVerificationCode(phone string) error {
+	key := "sms_verify:" + phone
+	return s.Client.Del(ctx, key).Err()
+}