feat(expense): starting expense handle

internal/expense/service.go

@@ -1,9 +1,33 @@
 package expense
 
+import (
+	"nos-comptes/internal/storage/dao"
+	"nos-comptes/internal/storage/model"
+)
+
 type Service struct {
-	Db *Database
+	db *Database
+}
+
+func (s Service) GetAllExpensesOfAnAccount(accountId string) (interface{}, interface{}) {
+	expenses, err := s.db.GetAllExpensesOfAnAccount(accountId)
+	if e, ok := err.(*dao.Error); ok {
+		switch {
+		case e.Type == dao.ErrTypeNotFound:
+			return nil, &model.ErrNotFound
+		default:
+			return nil, &model.ErrInternalServer
+		}
+	} else if err != nil {
+		return nil, &model.ErrInternalServer
+	}
+
+	if expenses == nil {
+		return nil, &model.ErrNotFound
+	}
+	return expenses, nil
 }
 
 func NewService(database *Database) *Service {
-	return &Service{Db: database}
+	return &Service{db: database}
 }