Restructured project

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

backend/src/repositories/otp.go

@@ -0,0 +1,63 @@
+package repositories
+
+import (
+	"FamilyHub/src/domain"
+	"context"
+	"database/sql"
+	"errors"
+)
+
+type OTPRepository interface {
+	Create(ctx context.Context, otp *domain.OTP) error
+	Get(ctx context.Context, userID int64, code string) (*domain.OTP, error)
+}
+
+type OTPSQLRepository struct {
+	db *sql.DB
+}
+
+func NewOTPSQLRepository(db *sql.DB) *OTPSQLRepository {
+	return &OTPSQLRepository{db: db}
+}
+
+func (r *OTPSQLRepository) Create(ctx context.Context, otp *domain.OTP) error {
+	query := `
+	INSERT INTO otp (user_id, otp, expired_at)
+	VALUES ($1, $2, $3)
+	`
+
+	_, err := r.db.ExecContext(ctx, query, otp.UserID, otp.Code, otp.ExpiredAt)
+	return err
+}
+
+func (r *OTPSQLRepository) Get(ctx context.Context, userID int64, code string) (*domain.OTP, error) {
+	query := `
+	DELETE FROM otp
+	WHERE ctid IN (
+		SELECT ctid
+		FROM otp
+		WHERE user_id = $1
+		  AND otp = $2
+		  AND expired_at > NOW()
+		ORDER BY expired_at
+		LIMIT 1
+	)
+	RETURNING user_id, otp, expired_at
+	`
+
+	var otp domain.OTP
+	err := r.db.QueryRowContext(ctx, query, userID, code).Scan(
+		&otp.UserID,
+		&otp.Code,
+		&otp.ExpiredAt,
+	)
+	if err != nil {
+		if errors.Is(err, sql.ErrNoRows) {
+			return nil, nil
+		}
+
+		return nil, err
+	}
+
+	return &otp, nil
+}