Integrate Notification Service into Tender Management System

- Added a new notification service to handle various notification types (email, SMS, push, OTP).
- Implemented configuration for the notification service, allowing customization via environment variables.
- Updated user and customer services to utilize the notification service for sending welcome emails and status updates.
- Introduced a builder pattern for constructing notification requests, enhancing usability and flexibility.
- Enhanced error handling and logging for notification operations, ensuring robust service integration.
- Updated documentation to include usage examples and configuration details for the new notification SDK.

internal/customer/service.go

@@ -7,10 +7,12 @@ import (
 	"errors"
 	"fmt"
 	"math/big"
+	"strings"
 	"time"
 
 	"tm/internal/company"
 	"tm/pkg/logger"
+	"tm/pkg/notification"
 	"tm/pkg/redis"
 	"tm/pkg/response"
 
@@ -49,16 +51,18 @@ type customerService struct {
 	authService    authorization.AuthorizationService
 	companyService company.Service
 	redisClient    redis.Client
+	notification   notification.SDK
 }
 
 // New creates a new customer service
-func New(repository Repository, logger logger.Logger, authService authorization.AuthorizationService, companyService company.Service, redisClient redis.Client) Service {
+func New(repository Repository, logger logger.Logger, authService authorization.AuthorizationService, companyService company.Service, redisClient redis.Client, notificationSDK notification.SDK) Service {
 	return &customerService{
 		repository:     repository,
 		logger:         logger,
 		authService:    authService,
 		companyService: companyService,
 		redisClient:    redisClient,
+		notification:   notificationSDK,
 	}
 }
 
@@ -125,6 +129,8 @@ func (s *customerService) Register(ctx context.Context, form *CreateCustomerForm
 		"company_ids": companyIDs,
 	})
 
+	go s.notification.SendEmail(ctx, customer.Email, fmt.Sprintf("Welcome to Tender Management\nUsername: %s\nPassword: %s", customer.Username, form.Password), customer.ID.Hex())
+
 	return customer.ToResponse(nil), nil
 }
 
@@ -293,7 +299,7 @@ func (s *customerService) Delete(ctx context.Context, id string) error {
 // UpdateStatus updates customer status
 func (s *customerService) UpdateStatus(ctx context.Context, id string, form *UpdateStatusForm) error {
 	// Get customer to check if exists
-	_, err := s.repository.GetByID(ctx, id)
+	customer, err := s.repository.GetByID(ctx, id)
 	if err != nil {
 		return errors.New("customer not found")
 	}
@@ -315,6 +321,8 @@ func (s *customerService) UpdateStatus(ctx context.Context, id string, form *Upd
 		"status":      form.Status,
 	})
 
+	go s.notification.SendEmail(ctx, customer.Email, fmt.Sprintf("Your account has been %s", strings.ToUpper(form.Status)), customer.ID.Hex())
+
 	return nil
 }
 
@@ -769,14 +777,7 @@ func (s *customerService) RequestResetPassword(ctx context.Context, form *Reques
 	}
 
 	// Send OTP via email
-	// err = s.emailService.SendPasswordResetOTP(ctx, form.Email, otpCode)
-	// if err != nil {
-	// 	s.logger.Error("Failed to send password reset OTP", map[string]interface{}{
-	// 		"error": err.Error(),
-	// 		"email": form.Email,
-	// 	})
-	// 	return nil, errors.New("failed to send verification code")
-	// }
+	go s.notification.SendEmail(ctx, form.Email, fmt.Sprintf("Your password reset code is: %s", otpCode), customer.ID.Hex())
 
 	s.logger.Info("Password reset OTP sent successfully", map[string]interface{}{
 		"email":       form.Email,
@@ -964,6 +965,8 @@ func (s *customerService) ResetPassword(ctx context.Context, form *ResetPassword
 		"customer_id": customer.ID,
 	})
 
+	go s.notification.SendEmail(ctx, tokenData.Email, "Your password has been reset successfully", customer.ID.Hex())
+
 	return &ResetPasswordResponse{
 		Message: "Password reset successfully",
 		Success: true,