add order rep

repositories/OrderRepository.go

@@ -0,0 +1,90 @@
+package repositories
+
+import(
+	"strconv"
+	"gorm.io/gorm"
+
+	"example.com/gin/test/models"
+)	
+
+type OrderRepository interface {
+	Create(models.Order) (models.Order, error)	
+	GetAll() ([]models.Order, error)
+	GetById(string) (models.Order, error)
+	GetAllBySession(string) ([]models.Order, error)
+	Update(models.Order) (models.Order, error)
+	DeleteById(string) (error)
+}
+
+type GORMOrderRepository struct {
+	DB *gorm.DB
+}
+
+func NewGORMOrderRepository(db *gorm.DB) OrderRepository {
+	return &GORMOrderRepository{
+		DB: db,
+	}
+}
+
+func (r *GORMOrderRepository) Create(order models.Order) (models.Order, error) {
+	//Omit the shopitem so it is not created again in db leading to unique constain fails
+	result := r.DB.Omit("CartItems").Create(&order)
+	if result.Error != nil {
+		return models.Order{}, result.Error	
+	}
+
+	return order, nil
+}
+
+func (r *GORMOrderRepository) GetAll() ([]models.Order, error) {
+	var orders []models.Order
+	result := r.DB.Preload("CartItems").Find(&orders)
+
+	return orders, result.Error
+}
+
+func (t *GORMOrderRepository) GetById(id string) (models.Order, error) {
+	orderId, err := strconv.Atoi(id)
+
+	if err != nil {
+		return models.Order{}, err
+	}
+
+	var order models.Order
+	result := t.DB.Preload("CartItems").First(&order, uint(orderId))
+
+	if result.Error != nil {
+		return models.Order{}, result.Error
+	}
+
+	return order, nil
+}
+
+
+func (r *GORMOrderRepository) GetAllBySession(sessionId string) ([]models.Order, error) {
+	var orders []models.Order
+	result := r.DB.Preload("CartItems").Where("session_id = ?", sessionId).Find(&orders)
+
+	return orders, result.Error
+
+}
+
+func (r *GORMOrderRepository) Update(order models.Order) (models.Order, error) {
+	result := r.DB.Save(&order)
+	if result.Error != nil {
+		return models.Order{}, result.Error
+	}
+
+	return order, nil
+}
+
+func (r *GORMOrderRepository) DeleteById(id string) error {
+	orderId, err := strconv.Atoi(id)
+
+	if err != nil {
+		return err
+	}
+
+	result := r.DB.Delete(&models.Order{}, orderId)
+	return result.Error
+}