Refactor Notification Management and Enhance Customer Features

- Updated the notification handling logic to utilize a new SDK for sending notifications, improving the flexibility and scalability of the notification system.
- Introduced new methods in the notification service for sending notifications to users and customers based on various target audience types, enhancing the notification delivery capabilities.
- Added a new endpoint to assign companies to a customer, improving customer management functionalities.
- Refactored the customer entity and forms to replace 'CompanyIDs' with 'Companies', ensuring consistency across the data model.
- Enhanced API documentation with Swagger comments for the new endpoint and updated notification structures, ensuring clarity for API consumers.

internal/customer/repository.go

@@ -20,6 +20,9 @@ type Repository interface {
 	GetByID(ctx context.Context, id string) (*Customer, error)
 	GetByEmail(ctx context.Context, email string) (*Customer, error)
 	GetByUsername(ctx context.Context, username string) (*Customer, error)
+	GetByIDs(ctx context.Context, ids []string) ([]Customer, error)
+	GetByRole(ctx context.Context, role CustomerRole) ([]Customer, error)
+	GetByCompanies(ctx context.Context, companies []string) ([]Customer, error)
 	GetByCompanyID(ctx context.Context, companyID string, pagination *response.Pagination) ([]*Customer, int64, error)
 	Search(ctx context.Context, form *SearchCustomersForm, pagination *response.Pagination) ([]Customer, int64, error)
 	Delete(ctx context.Context, id string) error
@@ -168,6 +171,48 @@ func (r *customerRepository) GetByUsername(ctx context.Context, username string)
 	return customer, nil
 }
 
+// GetByIDs retrieves customers by IDs
+func (r *customerRepository) GetByIDs(ctx context.Context, ids []string) ([]Customer, error) {
+	customers, err := r.ormRepo.FindAll(ctx, bson.M{"_id": bson.M{"$in": ids}}, orm.NewPaginationBuilder().Limit(len(ids)).Build())
+	if err != nil {
+		if errors.Is(err, orm.ErrDocumentNotFound) {
+			return nil, errors.New("customers not found")
+		}
+		r.logger.Error("Failed to get customers by IDs", map[string]interface{}{
+			"error": err.Error(),
+			"ids":   ids,
+		})
+		return nil, err
+	}
+	return customers.Items, nil
+}
+
+// GetByRole retrieves customers by role
+func (r *customerRepository) GetByRole(ctx context.Context, role CustomerRole) ([]Customer, error) {
+	customers, err := r.ormRepo.FindAll(ctx, bson.M{"role": role}, orm.NewPaginationBuilder().Build())
+	if err != nil {
+		if errors.Is(err, orm.ErrDocumentNotFound) {
+			return nil, errors.New("customers not found")
+		}
+		r.logger.Error("Failed to get customers by role", map[string]interface{}{
+			"error": err.Error(),
+			"role":  role,
+		})
+		return nil, err
+	}
+	return customers.Items, nil
+}
+
+// GetByCompanies retrieves customers by companies
+
+func (r *customerRepository) GetByCompanies(ctx context.Context, companies []string) ([]Customer, error) {
+	customers, err := r.ormRepo.FindAll(ctx, bson.M{"companies": bson.M{"$in": companies}}, orm.NewPaginationBuilder().Build())
+	if err != nil {
+		return nil, err
+	}
+	return customers.Items, nil
+}
+
 // GetByCompanyID retrieves customers by company ID with pagination
 func (r *customerRepository) GetByCompanyID(ctx context.Context, companyID string, pagination *response.Pagination) ([]*Customer, int64, error) {
 	// Build pagination