Restructured project

- backend moved to backend directory
- added and initialized frontend with vue
- moved infrastructure files to infra directory

backend/src/domain/users.go

@@ -0,0 +1,59 @@
+package domain
+
+import (
+	"time"
+)
+
+type UserModel struct {
+	ID           int64
+	TelegramID   int64
+	Username     *string
+	FirstName    *string
+	LastName     *string
+	LanguageCode *string
+	CreatedAt    time.Time
+	UpdatedAt    time.Time
+}
+
+type CreateUserRequest struct {
+	TelegramID   int64   `json:"telegram_id" validate:"required"`
+	Username     *string `json:"username"`
+	FirstName    *string `json:"first_name" validate:"required"`
+	LastName     *string `json:"last_name"`
+	LanguageCode *string `json:"language_code"`
+}
+
+type UpdateUserRequest struct {
+	Username     *string `json:"username"`
+	FirstName    *string `json:"first_name"`
+	LastName     *string `json:"last_name"`
+	LanguageCode *string `json:"language_code"`
+}
+
+type UserResponse struct {
+	ID           int64   `json:"id"`
+	TelegramID   int64   `json:"telegram_id"`
+	Username     *string `json:"username"`
+	FirstName    *string `json:"first_name"`
+	LastName     *string `json:"last_name"`
+	LanguageCode *string `json:"language_code"`
+	CreatedAt    string  `json:"created_at"`
+	UpdatedAt    string  `json:"updated_at"`
+}
+
+type UserErrorResponse struct {
+	Error string `json:"error"`
+}
+
+func (response *UserResponse) ModelToResponse(u *UserModel) UserResponse {
+	return UserResponse{
+		ID:           u.ID,
+		TelegramID:   u.TelegramID,
+		Username:     u.Username,
+		FirstName:    u.FirstName,
+		LastName:     u.LastName,
+		LanguageCode: u.LanguageCode,
+		CreatedAt:    u.CreatedAt.Format(time.RFC3339),
+		UpdatedAt:    u.UpdatedAt.Format(time.RFC3339),
+	}
+}