SMS 인증을 위한 Naver SENS 연동 및 API 구현

backend/internal/handler/auth_handler.go

@@ -2,27 +2,61 @@ package handler
 
 import (
 	"baron-sso-backend/internal/domain"
+	"baron-sso-backend/internal/service"
 	"bytes"
 	"encoding/json"
 	"fmt"
 	"io"
+	"log"
+	"math/rand"
 	"net/http"
 	"os"
+	"strings"
+	"time"
 
 	"github.com/gofiber/fiber/v2"
 )
 
 type AuthHandler struct {
-	ProjectID string
+	ProjectID  string
+	SmsService domain.SmsService
 }
 
 func NewAuthHandler() *AuthHandler {
 	pid := os.Getenv("DESCOPE_PROJECT_ID")
 	if pid == "" {
 		// Fallback for dev if not set
-		pid = "P37DsGepBT6uDWb5TYYpb5RxUPuq" 
+		pid = "P37DsGepBT6uDWb5TYYpb5RxUPuq"
 	}
-	return &AuthHandler{ProjectID: pid}
+	return &AuthHandler{
+		ProjectID:  pid,
+		SmsService: service.NewSmsService(),
+	}
+}
+
+// SendSms sends a verification code via SMS.
+func (h *AuthHandler) SendSms(c *fiber.Ctx) error {
+	var req domain.SmsRequest
+	if err := c.BodyParser(&req); err != nil {
+		return c.Status(fiber.StatusBadRequest).JSON(fiber.Map{"error": "Invalid request body"})
+	}
+
+	// Sanitize phone number: remove dashes
+	sanitizedPhone := strings.ReplaceAll(req.PhoneNumber, "-", "")
+
+	// Generate a 6-digit verification code
+	rand.Seed(time.Now().UnixNano())
+	code := fmt.Sprintf("%06d", rand.Intn(1000000))
+	content := fmt.Sprintf("[Baron SSO] Your verification code is %s", code)
+
+	if err := h.SmsService.SendSms(sanitizedPhone, content); err != nil {
+		log.Printf("Error sending SMS: %v", err)
+		return c.Status(fiber.StatusInternalServerError).JSON(fiber.Map{"error": "Failed to send SMS"})
+	}
+
+	// TODO: Store the verification code for later verification
+
+	return c.JSON(fiber.Map{"message": "SMS sent successfully"})
 }
 
 // getBaseURL extracts the region code from Project ID if present (e.g., P37... -> api.37ds.descope.com)