refacto: add db tx as a possible input for repo methods

README.md

@@ -577,3 +577,8 @@ But between `[]*T` and `[]T`, the only difference that I see (pointed out by
 `ChatGPT`) is how the memory is allocated. With `[]T` it might be better for
 the GC to deal with the memory free. I thing for my project I will stick to
 `[]T`.
+
+### 2024/10/25
+
+Read this [article](https://konradreiche.com/blog/two-common-go-interface-misuses/)
+today, maybe I am abusing the usage of interfaces?

internal/howmuch/adapter/repo/db.go

@@ -26,6 +26,7 @@ import (
 	"context"
 	"database/sql"
 
+	"git.vinchent.xyz/vinchent/howmuch/internal/howmuch/adapter/repo/sqlc"
 	"git.vinchent.xyz/vinchent/howmuch/internal/howmuch/usecase/repo"
 	"git.vinchent.xyz/vinchent/howmuch/internal/pkg/log"
 )
@@ -66,3 +67,11 @@ func (dr *dbRepository) Transaction(
 	data, err := txFunc(ctx, tx)
 	return data, err
 }
+
+func getQueries(queries *sqlc.Queries, tx any) *sqlc.Queries {
+	transaction, ok := tx.(*sql.Tx)
+	if ok {
+		return sqlc.New(transaction)
+	}
+	return queries
+}

internal/howmuch/adapter/repo/event.go

@@ -48,8 +48,35 @@ func NewEventRepository(db *sql.DB) repo.EventRepository {
 func (e *eventRepository) Create(
 	ctx context.Context,
 	evEntity *model.EventEntity,
+	tx any,
 ) (*model.EventEntity, error) {
-	panic("unimplemented")
+	timeoutCtx, cancel := context.WithTimeout(ctx, queryTimeout)
+	defer cancel()
+
+	queries := getQueries(e.queries, tx)
+
+	event, err := queries.InsertEvent(timeoutCtx, sqlc.InsertEventParams{
+		Name:            evEntity.Name,
+		Description:     sql.NullString{String: evEntity.Description, Valid: true},
+		TotalAmount:     sql.NullInt32{Int32: int32(evEntity.TotalAmount), Valid: true},
+		DefaultCurrency: evEntity.DefaultCurrency,
+		OwnerID:         int32(evEntity.OwnerID),
+		CreatedAt:       time.Now(),
+		UpdatedAt:       time.Now(),
+	})
+	if err != nil {
+		return nil, err
+	}
+	return &model.EventEntity{
+		ID:              int(event.ID),
+		Name:            event.Name,
+		Description:     event.Description.String,
+		TotalAmount:     int(event.TotalAmount.Int32),
+		DefaultCurrency: event.DefaultCurrency,
+		OwnerID:         int(event.OwnerID),
+		CreatedAt:       event.CreatedAt,
+		UpdatedAt:       event.UpdatedAt,
+	}, nil
 }
 
 func convToEventRetrieved(eventDTO *sqlc.GetEventByIDRow) (*model.EventRetrieved, error) {
@@ -89,8 +116,17 @@ func convToEventRetrieved(eventDTO *sqlc.GetEventByIDRow) (*model.EventRetrieved
 }
 
 // GetByID implements repo.EventRepository.
-func (e *eventRepository) GetByID(ctx context.Context, eventID int) (*model.EventRetrieved, error) {
+func (e *eventRepository) GetByID(
-	eventDTO, err := e.queries.GetEventByID(ctx, int32(eventID))
+	ctx context.Context,
+	eventID int,
+	tx any,
+) (*model.EventRetrieved, error) {
+	timeoutCtx, cancel := context.WithTimeout(ctx, queryTimeout)
+	defer cancel()
+
+	queries := getQueries(e.queries, tx)
+
+	eventDTO, err := queries.GetEventByID(timeoutCtx, int32(eventID))
 	if err != nil {
 		log.ErrorLog("query error", "err", err)
 		return nil, err
@@ -128,8 +164,14 @@ func convToEventList(eventsDTO []sqlc.ListEventsByUserIDRow) ([]model.EventListR
 func (e *eventRepository) ListEventsByUserID(
 	ctx context.Context,
 	userID int,
+	tx any,
 ) ([]model.EventListRetrieved, error) {
-	eventsDTO, err := e.queries.ListEventsByUserID(ctx, int32(userID))
+	timeoutCtx, cancel := context.WithTimeout(ctx, queryTimeout)
+	defer cancel()
+
+	queries := getQueries(e.queries, tx)
+
+	eventsDTO, err := queries.ListEventsByUserID(timeoutCtx, int32(userID))
 	if err != nil {
 		log.ErrorLog("query error", "err", err)
 		return nil, err
@@ -142,8 +184,14 @@ func (e *eventRepository) ListEventsByUserID(
 func (e *eventRepository) UpdateEventByID(
 	ctx context.Context,
 	event *model.EventUpdateEntity,
+	tx any,
 ) error {
-	err := e.queries.UpdateEventByID(ctx, sqlc.UpdateEventByIDParams{
+	timeoutCtx, cancel := context.WithTimeout(ctx, queryTimeout)
+	defer cancel()
+
+	queries := getQueries(e.queries, tx)
+
+	err := queries.UpdateEventByID(timeoutCtx, sqlc.UpdateEventByIDParams{
 		ID:          int32(event.ID),
 		Name:        event.Name,
 		Description: sql.NullString{String: event.Description, Valid: true},

internal/howmuch/adapter/repo/expense.go

@@ -45,21 +45,39 @@ func NewExpenseRepository(db *sql.DB) repo.ExpenseRepository {
 }
 
 // DeleteExpense implements repo.ExpenseRepository.
-func (e *expenseRepository) DeleteExpense(ctx context.Context, expenseID int) error {
+func (e *expenseRepository) DeleteExpense(ctx context.Context, expenseID int, tx any) error {
-	return e.queries.DeleteExpense(ctx, int32(expenseID))
+	timeoutCtx, cancel := context.WithTimeout(ctx, queryTimeout)
+	defer cancel()
+
+	queries := getQueries(e.queries, tx)
+	return queries.DeleteExpense(timeoutCtx, int32(expenseID))
 }
 
 // DeleteTransactionsOfExpense implements repo.ExpenseRepository.
-func (e *expenseRepository) DeleteTransactionsOfExpense(ctx context.Context, expenseID int) error {
+func (e *expenseRepository) DeleteTransactionsOfExpense(
-	return e.queries.DeleteTransactionsOfExpenseID(ctx, int32(expenseID))
+	ctx context.Context,
+	expenseID int,
+	tx any,
+) error {
+	timeoutCtx, cancel := context.WithTimeout(ctx, queryTimeout)
+	defer cancel()
+
+	queries := getQueries(e.queries, tx)
+	return queries.DeleteTransactionsOfExpenseID(timeoutCtx, int32(expenseID))
 }
 
 // GetExpenseByID implements repo.ExpenseRepository.
 func (e *expenseRepository) GetExpenseByID(
 	ctx context.Context,
 	expenseID int,
+	tx any,
 ) (*model.ExpenseRetrieved, error) {
-	expenseDTO, err := e.queries.GetExpenseByID(ctx, int32(expenseID))
+	timeoutCtx, cancel := context.WithTimeout(ctx, queryTimeout)
+	defer cancel()
+
+	queries := getQueries(e.queries, tx)
+
+	expenseDTO, err := queries.GetExpenseByID(timeoutCtx, int32(expenseID))
 	if err != nil {
 		return nil, err
 	}
@@ -150,8 +168,14 @@ func convToExpenseRetrieved(expenseDTO *sqlc.GetExpenseByIDRow) (*model.ExpenseR
 func (e *expenseRepository) InsertExpense(
 	ctx context.Context,
 	expenseEntity *model.ExpenseEntity,
+	tx any,
 ) (*model.ExpenseEntity, error) {
-	expenseDTO, err := e.queries.InsertExpense(ctx, sqlc.InsertExpenseParams{
+	timeoutCtx, cancel := context.WithTimeout(ctx, queryTimeout)
+	defer cancel()
+
+	queries := getQueries(e.queries, tx)
+
+	expenseDTO, err := queries.InsertExpense(timeoutCtx, sqlc.InsertExpenseParams{
 		CreatedAt: time.Now(),
 		UpdatedAt: time.Now(),
 		Amount:    int32(expenseEntity.Amount),
@@ -179,8 +203,14 @@ func (e *expenseRepository) InsertExpense(
 func (e *expenseRepository) ListExpensesByEventID(
 	ctx context.Context,
 	id int,
+	tx any,
 ) ([]model.ExpensesListRetrieved, error) {
-	listDTO, err := e.queries.ListExpensesByEventID(ctx, int32(id))
+	timeoutCtx, cancel := context.WithTimeout(ctx, queryTimeout)
+	defer cancel()
+
+	queries := getQueries(e.queries, tx)
+
+	listDTO, err := queries.ListExpensesByEventID(timeoutCtx, int32(id))
 	if err != nil {
 		return nil, err
 	}
@@ -206,8 +236,14 @@ func (e *expenseRepository) ListExpensesByEventID(
 func (e *expenseRepository) UpdateExpenseByID(
 	ctx context.Context,
 	expenseUpdate *model.ExpenseUpdateEntity,
+	tx any,
 ) (*model.ExpenseEntity, error) {
-	expenseDTO, err := e.queries.UpdateExpenseByID(ctx, sqlc.UpdateExpenseByIDParams{
+	timeoutCtx, cancel := context.WithTimeout(ctx, queryTimeout)
+	defer cancel()
+
+	queries := getQueries(e.queries, tx)
+
+	expenseDTO, err := queries.UpdateExpenseByID(timeoutCtx, sqlc.UpdateExpenseByIDParams{
 		ID:        int32(expenseUpdate.ID),
 		UpdatedAt: time.Now(),
 		Amount:    int32(expenseUpdate.Amount),

internal/howmuch/adapter/repo/user.go

@@ -34,43 +34,36 @@ import (
 )
 
 type userRepository struct {
-	querier *sqlc.Queries
+	queries *sqlc.Queries
 }
 
-const insertTimeout = 1 * time.Second
+const queryTimeout = 3 * time.Second
 
 func NewUserRepository(db *sql.DB) repo.UserRepository {
 	return &userRepository{
-		querier: sqlc.New(db),
+		queries: sqlc.New(db),
 	}
 }
 
 // Create
-func (ur *userRepository) Create(
+func (u *userRepository) Create(
 	ctx context.Context,
-	transaction interface{},
+	userEntity *model.UserEntity,
-	u *model.UserEntity,
+	tx any,
 ) (*model.UserEntity, error) {
-	timeoutCtx, cancel := context.WithTimeout(ctx, insertTimeout)
+	timeoutCtx, cancel := context.WithTimeout(ctx, queryTimeout)
 	defer cancel()
 
-	args := sqlc.InsertUserParams{
+	queries := getQueries(u.queries, tx)
-		Email:     u.Email,
+
-		FirstName: u.FirstName,
+	userDB, err := queries.InsertUser(timeoutCtx, sqlc.InsertUserParams{
-		LastName:  u.LastName,
+		Email:     userEntity.Email,
-		Password:  u.Password,
+		FirstName: userEntity.FirstName,
+		LastName:  userEntity.LastName,
+		Password:  userEntity.Password,
 		CreatedAt: time.Now(),
 		UpdatedAt: time.Now(),
-	}
+	})
-
-	tx, ok := transaction.(*sql.Tx)
-	if !ok {
-		return nil, errors.New("transaction is not a *sql.Tx")
-	}
-
-	queries := sqlc.New(tx)
-
-	userDB, err := queries.InsertUser(timeoutCtx, args)
 	if err != nil {
 		return nil, err
 	}
@@ -87,8 +80,17 @@ func (ur *userRepository) Create(
 }
 
 // GetByEmail if not found, return nil for user but not error.
-func (ur *userRepository) GetByEmail(ctx context.Context, email string) (*model.UserEntity, error) {
+func (u *userRepository) GetByEmail(
-	userDB, err := ur.querier.GetUserByEmail(ctx, email)
+	ctx context.Context,
+	email string,
+	tx any,
+) (*model.UserEntity, error) {
+	timeoutCtx, cancel := context.WithTimeout(ctx, queryTimeout)
+	defer cancel()
+
+	queries := getQueries(u.queries, tx)
+
+	userDB, err := queries.GetUserByEmail(timeoutCtx, email)
 	if errors.Is(err, sql.ErrNoRows) {
 		// No query error, but user not found
 		return nil, nil
@@ -107,8 +109,13 @@ func (ur *userRepository) GetByEmail(ctx context.Context, email string) (*model.
 	}, nil
 }
 
-func (ur *userRepository) GetByID(ctx context.Context, id int) (*model.UserEntity, error) {
+func (u *userRepository) GetByID(ctx context.Context, id int, tx any) (*model.UserEntity, error) {
-	userDB, err := ur.querier.GetUserByID(ctx, int32(id))
+	timeoutCtx, cancel := context.WithTimeout(ctx, queryTimeout)
+	defer cancel()
+
+	queries := getQueries(u.queries, tx)
+
+	userDB, err := queries.GetUserByID(timeoutCtx, int32(id))
 	if errors.Is(err, sql.ErrNoRows) {
 		// No query error, but user not found
 		return nil, nil

internal/howmuch/usecase/repo/event.go

@@ -29,30 +29,36 @@ import (
 )
 
 type EventRepository interface {
-	Create(ctx context.Context, evEntity *model.EventEntity) (*model.EventEntity, error)
+	Create(ctx context.Context, evEntity *model.EventEntity, tx any) (*model.EventEntity, error)
 
 	// UpdateEventByID updates the event related information (name, descriptions)
-	UpdateEventByID(ctx context.Context, event *model.EventUpdateEntity) error
+	UpdateEventByID(ctx context.Context, event *model.EventUpdateEntity, tx any) error
 
-	GetByID(ctx context.Context, eventID int) (*model.EventRetrieved, error)
+	GetByID(ctx context.Context, eventID int, tx any) (*model.EventRetrieved, error)
 
 	// related to events of a user
-	ListEventsByUserID(ctx context.Context, userID int) ([]model.EventListRetrieved, error)
+	ListEventsByUserID(ctx context.Context, userID int, tx any) ([]model.EventListRetrieved, error)
 
 	// CheckParticipation(ctx context.Context, userID, eventID int) error
 }
 
 type ExpenseRepository interface {
-	DeleteExpense(ctx context.Context, expenseID int) error
+	DeleteExpense(ctx context.Context, expenseID int, tx any) error
-	DeleteTransactionsOfExpense(ctx context.Context, expenseID int) error
+	DeleteTransactionsOfExpense(ctx context.Context, expenseID int, tx any) error
-	GetExpenseByID(ctx context.Context, expenseID int) (*model.ExpenseRetrieved, error)
+	GetExpenseByID(ctx context.Context, expenseID int, tx any) (*model.ExpenseRetrieved, error)
 	InsertExpense(
 		ctx context.Context,
 		expenseEntity *model.ExpenseEntity,
+		tx any,
 	) (*model.ExpenseEntity, error)
-	ListExpensesByEventID(ctx context.Context, id int) ([]model.ExpensesListRetrieved, error)
+	ListExpensesByEventID(
+		ctx context.Context,
+		id int,
+		tx any,
+	) ([]model.ExpensesListRetrieved, error)
 	UpdateExpenseByID(
 		ctx context.Context,
 		expenseUpdate *model.ExpenseUpdateEntity,
+		tx any,
 	) (*model.ExpenseEntity, error)
 }

internal/howmuch/usecase/repo/user.go

@@ -31,9 +31,9 @@ import (
 type UserRepository interface {
 	Create(
 		ctx context.Context,
-		transaction interface{},
 		u *model.UserEntity,
+		tx any,
 	) (*model.UserEntity, error)
-	GetByEmail(ctx context.Context, email string) (*model.UserEntity, error)
+	GetByEmail(ctx context.Context, email string, tx any) (*model.UserEntity, error)
-	GetByID(ctx context.Context, id int) (*model.UserEntity, error)
+	GetByID(ctx context.Context, id int, tx any) (*model.UserEntity, error)
 }

internal/howmuch/usecase/usecase/event.go

@@ -62,7 +62,7 @@ func (evuc *eventUsecase) CreateEvent(
 	ctx context.Context,
 	evRequest *model.EventCreateRequest,
 ) (*model.EventInfoResponse, error) {
-	// transfer evRequest to PO
+	// transfer evRequest to evEntity
 
 	evEntity := &model.EventEntity{
 		Name:            evRequest.Name,
@@ -75,7 +75,8 @@ func (evuc *eventUsecase) CreateEvent(
 	data, err := evuc.dbRepo.Transaction(
 		ctx,
 		func(txCtx context.Context, tx interface{}) (interface{}, error) {
-			created, err := evuc.eventRepo.Create(ctx, evEntity)
+			// Create
+			created, err := evuc.eventRepo.Create(ctx, evEntity, tx)
 			if err != nil {
 				return nil, err
 			}
@@ -104,6 +105,7 @@ func (evuc *eventUsecase) CreateEvent(
 				),
 				Owner:     ownerResponse,
 				CreatedAt: created.CreatedAt,
+				UpdatedAt: created.UpdatedAt,
 			}
 			return evResponse, err
 		})

internal/howmuch/usecase/usecase/repomock/testuserrepo.go

@@ -36,8 +36,8 @@ type TestUserRepository struct{}
 
 func (tur *TestUserRepository) Create(
 	ctx context.Context,
-	transaction interface{},
 	u *model.UserEntity,
+	tx any,
 ) (*model.UserEntity, error) {
 	user := *u
 
@@ -53,6 +53,7 @@ func (tur *TestUserRepository) Create(
 func (tur *TestUserRepository) GetByEmail(
 	ctx context.Context,
 	email string,
+	tx any,
 ) (*model.UserEntity, error) {
 	hashedPwd, _ := bcrypt.GenerateFromPassword([]byte("strongHashed"), 12)
 	switch email {
@@ -71,7 +72,11 @@ func (tur *TestUserRepository) GetByEmail(
 	return nil, UserTestDummyErr
 }
 
-func (tur *TestUserRepository) GetByID(ctx context.Context, id int) (*model.UserEntity, error) {
+func (tur *TestUserRepository) GetByID(
+	ctx context.Context,
+	id int,
+	tx any,
+) (*model.UserEntity, error) {
 	hashedPwd, _ := bcrypt.GenerateFromPassword([]byte("strongHashed"), 12)
 	switch id {
 	case 123:

internal/howmuch/usecase/usecase/user.go

@@ -86,12 +86,12 @@ func (uuc *userUsecase) Create(
 	data, err := uuc.dbRepo.Transaction(
 		ctx,
 		func(txCtx context.Context, tx interface{}) (interface{}, error) {
-			created, err := uuc.userRepo.Create(txCtx, tx, &model.UserEntity{
+			created, err := uuc.userRepo.Create(txCtx, &model.UserEntity{
 				Email:     u.Email,
 				Password:  u.Password,
 				FirstName: u.FirstName,
 				LastName:  u.LastName,
-			})
+			}, tx)
 			if err != nil {
 				match, _ := regexp.MatchString("SQLSTATE 23505", err.Error())
 				if match {
@@ -132,7 +132,7 @@ func (uuc *userUsecase) Create(
 }
 
 func (uuc *userUsecase) Exist(ctx context.Context, u *model.UserExistRequest) error {
-	got, err := uuc.userRepo.GetByEmail(ctx, u.Email)
+	got, err := uuc.userRepo.GetByEmail(ctx, u.Email, nil)
 	// Any query error?
 	if err != nil {
 		return err
@@ -160,7 +160,7 @@ func (uuc *userUsecase) GetUserBaseResponseByID(
 	// If not exists, get from the DB. And then put back
 	// into the cache with a timeout.
 	// Refresh the cache when the user data is updated (for now it cannot be updated)
-	got, err := uuc.userRepo.GetByID(ctx, userID)
+	got, err := uuc.userRepo.GetByID(ctx, userID, nil)
 	if err != nil {
 		return nil, err
 	}