feat: extract account to domain package

internal/account/service.go

@@ -0,0 +1,219 @@
+package account
+
+import (
+	"context"
+	"errors"
+	"fmt"
+	"github.com/google/uuid"
+	"github.com/jmoiron/sqlx"
+	"log/slog"
+	"spend-sparrow/internal/db"
+	"spend-sparrow/internal/service"
+	"spend-sparrow/internal/types"
+)
+
+type Service interface {
+	Add(ctx context.Context, user *types.User, name string) (*Account, error)
+	UpdateName(ctx context.Context, user *types.User, id string, name string) (*Account, error)
+	Get(ctx context.Context, user *types.User, id string) (*Account, error)
+	GetAll(ctx context.Context, user *types.User) ([]*Account, error)
+	Delete(ctx context.Context, user *types.User, id string) error
+}
+
+type ServiceImpl struct {
+	db     *sqlx.DB
+	clock  service.Clock
+	random service.Random
+}
+
+func NewServiceImpl(db *sqlx.DB, random service.Random, clock service.Clock) Service {
+	return ServiceImpl{
+		db:     db,
+		clock:  clock,
+		random: random,
+	}
+}
+
+func (s ServiceImpl) Add(ctx context.Context, user *types.User, name string) (*Account, error) {
+	if user == nil {
+		return nil, types.ErrUnauthorized
+	}
+
+	newId, err := s.random.UUID(ctx)
+	if err != nil {
+		return nil, types.ErrInternal
+	}
+
+	err = service.ValidateString(name, "name")
+	if err != nil {
+		return nil, err
+	}
+
+	account := &Account{
+		Id:     newId,
+		UserId: user.Id,
+
+		Name: name,
+
+		CurrentBalance:  0,
+		LastTransaction: nil,
+		OinkBalance:     0,
+
+		CreatedAt: s.clock.Now(),
+		CreatedBy: user.Id,
+		UpdatedAt: nil,
+		UpdatedBy: nil,
+	}
+
+	r, err := s.db.NamedExecContext(ctx, `
+		INSERT INTO account (id, user_id, name, current_balance, oink_balance, created_at, created_by) 
+		VALUES (:id, :user_id, :name, :current_balance, :oink_balance, :created_at, :created_by)`, account)
+	err = db.TransformAndLogDbError(ctx, "account Insert", r, err)
+	if err != nil {
+		return nil, err
+	}
+
+	return account, nil
+}
+
+func (s ServiceImpl) UpdateName(ctx context.Context, user *types.User, id string, name string) (*Account, error) {
+	if user == nil {
+		return nil, types.ErrUnauthorized
+	}
+	err := service.ValidateString(name, "name")
+	if err != nil {
+		return nil, err
+	}
+	uuid, err := uuid.Parse(id)
+	if err != nil {
+		slog.ErrorContext(ctx, "account update", "err", err)
+		return nil, fmt.Errorf("could not parse Id: %w", service.ErrBadRequest)
+	}
+
+	tx, err := s.db.BeginTxx(ctx, nil)
+	err = db.TransformAndLogDbError(ctx, "account Update", nil, err)
+	if err != nil {
+		return nil, err
+	}
+	defer func() {
+		_ = tx.Rollback()
+	}()
+
+	var account Account
+	err = tx.GetContext(ctx, &account, `SELECT * FROM account WHERE user_id = ? AND id = ?`, user.Id, uuid)
+	err = db.TransformAndLogDbError(ctx, "account Update", nil, err)
+	if err != nil {
+		if errors.Is(err, db.ErrNotFound) {
+			return nil, fmt.Errorf("account %v not found: %w", id, service.ErrBadRequest)
+		}
+		return nil, types.ErrInternal
+	}
+
+	timestamp := s.clock.Now()
+	account.Name = name
+	account.UpdatedAt = &timestamp
+	account.UpdatedBy = &user.Id
+
+	r, err := tx.NamedExecContext(ctx, `
+		UPDATE account 
+		SET
+			name = :name,
+			updated_at = :updated_at,
+			updated_by = :updated_by
+		WHERE id = :id 
+			AND user_id = :user_id`, account)
+	err = db.TransformAndLogDbError(ctx, "account Update", r, err)
+	if err != nil {
+		return nil, err
+	}
+
+	err = tx.Commit()
+	err = db.TransformAndLogDbError(ctx, "account Update", nil, err)
+	if err != nil {
+		return nil, err
+	}
+
+	return &account, nil
+}
+
+func (s ServiceImpl) Get(ctx context.Context, user *types.User, id string) (*Account, error) {
+	if user == nil {
+		return nil, service.ErrUnauthorized
+	}
+	uuid, err := uuid.Parse(id)
+	if err != nil {
+		slog.ErrorContext(ctx, "account get", "err", err)
+		return nil, fmt.Errorf("could not parse Id: %w", service.ErrBadRequest)
+	}
+
+	var account Account
+	err = s.db.GetContext(ctx, &account, `
+		SELECT * FROM account WHERE user_id = ? AND id = ?`, user.Id, uuid)
+	err = db.TransformAndLogDbError(ctx, "account Get", nil, err)
+	if err != nil {
+		slog.ErrorContext(ctx, "account get", "err", err)
+		return nil, err
+	}
+
+	return &account, nil
+}
+
+func (s ServiceImpl) GetAll(ctx context.Context, user *types.User) ([]*Account, error) {
+	if user == nil {
+		return nil, service.ErrUnauthorized
+	}
+
+	accounts := make([]*Account, 0)
+	err := s.db.SelectContext(ctx, &accounts, `
+		SELECT * FROM account WHERE user_id = ? ORDER BY name`, user.Id)
+	err = db.TransformAndLogDbError(ctx, "account GetAll", nil, err)
+	if err != nil {
+		return nil, err
+	}
+
+	return accounts, nil
+}
+
+func (s ServiceImpl) Delete(ctx context.Context, user *types.User, id string) error {
+	if user == nil {
+		return service.ErrUnauthorized
+	}
+	uuid, err := uuid.Parse(id)
+	if err != nil {
+		slog.ErrorContext(ctx, "account delete", "err", err)
+		return fmt.Errorf("could not parse Id: %w", service.ErrBadRequest)
+	}
+
+	tx, err := s.db.BeginTxx(ctx, nil)
+	err = db.TransformAndLogDbError(ctx, "account Delete", nil, err)
+	if err != nil {
+		return err
+	}
+	defer func() {
+		_ = tx.Rollback()
+	}()
+
+	transactionsCount := 0
+	err = tx.GetContext(ctx, &transactionsCount, `SELECT COUNT(*) FROM "transaction" WHERE user_id = ? AND account_id = ?`, user.Id, uuid)
+	err = db.TransformAndLogDbError(ctx, "account Delete", nil, err)
+	if err != nil {
+		return err
+	}
+	if transactionsCount > 0 {
+		return fmt.Errorf("account has transactions, cannot delete: %w", service.ErrBadRequest)
+	}
+
+	res, err := tx.ExecContext(ctx, "DELETE FROM account WHERE id = ? and user_id = ?", uuid, user.Id)
+	err = db.TransformAndLogDbError(ctx, "account Delete", res, err)
+	if err != nil {
+		return err
+	}
+
+	err = tx.Commit()
+	err = db.TransformAndLogDbError(ctx, "account Delete", nil, err)
+	if err != nil {
+		return err
+	}
+
+	return nil
+}