Update API

modules/auth/handler/auth_handler.go

@@ -0,0 +1,72 @@
+package handler
+
+import (
+	"BE-MiniERP/database"
+	"BE-MiniERP/modules/auth/models"
+	"BE-MiniERP/modules/auth/repository"
+	"BE-MiniERP/modules/auth/service"
+
+	"github.com/gofiber/fiber/v2"
+)
+
+type AuthHandler struct {
+	Repo *repository.UserRepository
+}
+
+func NewAuthHandler() *AuthHandler {
+	return &AuthHandler{
+		Repo: repository.NewUserRepository(database.DB),
+	}
+}
+
+func (h *AuthHandler) Register(c *fiber.Ctx) error {
+	var input struct {
+		Username string `json:"username"`
+		Password string `json:"password"`
+		Role     string `json:"role"`
+	}
+
+	if err := c.BodyParser(&input); err != nil {
+		return c.Status(fiber.StatusBadRequest).JSON(fiber.Map{"error": "invalid input"})
+	}
+
+	hash, err := service.HashPassword(input.Password)
+	if err != nil {
+		return c.Status(fiber.StatusInternalServerError).JSON(fiber.Map{"error": "failed to hash password"})
+	}
+
+	user := &models.User{
+		Username:     input.Username,
+		PasswordHash: hash,
+		Role:         input.Role,
+	}
+
+	if err := h.Repo.Create(user); err != nil {
+		return c.Status(fiber.StatusInternalServerError).JSON(fiber.Map{"error": "failed to create user"})
+	}
+
+	return c.JSON(fiber.Map{"message": "user registered"})
+}
+
+func (h *AuthHandler) Login(c *fiber.Ctx) error {
+	var input struct {
+		Username string `json:"username"`
+		Password string `json:"password"`
+	}
+
+	if err := c.BodyParser(&input); err != nil {
+		return c.Status(fiber.StatusBadRequest).JSON(fiber.Map{"error": "invalid input"})
+	}
+
+	user, err := h.Repo.FindByUsername(input.Username)
+	if err != nil || !service.CheckPasswordHash(input.Password, user.PasswordHash) {
+		return c.Status(fiber.StatusUnauthorized).JSON(fiber.Map{"error": "invalid credentials"})
+	}
+
+	token, err := service.GenerateJWT(user.ID, user.Role)
+	if err != nil {
+		return c.Status(fiber.StatusInternalServerError).JSON(fiber.Map{"error": "failed to generate token"})
+	}
+
+	return c.JSON(fiber.Map{"token": token, "role": user.Role})
+}