db

package
v0.0.0-...-d157e50 Latest Latest
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This package is not in the latest version of its module.

 Go to latest Published: Sep 12, 2023 License: GPL-3.0 Imports: 7 Imported by: 0

Documentation

Index

Constants

View Source 
const (
	UniqueViolation = "23505"
)

Variables

View Source 
var ErrRecordNotFound = pgx.ErrNoRows
View Source 
var ErrUniqueVioloation = &pgconn.PgError{
	Code: UniqueViolation,
}

Functions

func ErrorCode 

func ErrorCode(err error) string

Types

type Account 

type Account struct {
	ID        int64              `json:"id"`
	Owner     string             `json:"owner"`
	Balance   int64              `json:"balance"`
	Currency  string             `json:"currency"`
	CreatedAt pgtype.Timestamptz `json:"created_at"`
}

type AddAccountBalanceParams 

type AddAccountBalanceParams struct {
	Amount int64 `json:"amount"`
	ID     int64 `json:"id"`
}

type CreateAccountParams 

type CreateAccountParams struct {
	Balance  int64  `json:"balance"`
	Currency string `json:"currency"`
	Owner    string `json:"owner"`
}

type CreateEntryParams 

type CreateEntryParams struct {
	AccountID int64 `json:"account_id"`
	Amount    int64 `json:"amount"`
}

type CreateTransferParams 

type CreateTransferParams struct {
	Amount        int64 `json:"amount"`
	FromAccountID int64 `json:"from_account_id"`
	ToAccountID   int64 `json:"to_account_id"`
}

type CreateUserParams 

type CreateUserParams struct {
	Email          string `json:"email"`
	HashedPassword string `json:"hashed_password"`
	FullName       string `json:"full_name"`
	Username       string `json:"username"`
}

type DBTX 

type DBTX interface {
	Exec(context.Context, string, ...interface{}) (pgconn.CommandTag, error)
	Query(context.Context, string, ...interface{}) (pgx.Rows, error)
	QueryRow(context.Context, string, ...interface{}) pgx.Row
}

type Entry 

type Entry struct {
	ID        int64 `json:"id"`
	AccountID int64 `json:"account_id"`
	// can be negative or positive
	Amount    int64              `json:"amount"`
	CreatedAt pgtype.Timestamptz `json:"created_at"`
}

type ListAccountsParams 

type ListAccountsParams struct {
	Limit  int32 `json:"limit"`
	Offset int32 `json:"offset"`
}

type ListEntriesParams 

type ListEntriesParams struct {
	AccountID int64 `json:"account_id"`
	Limit     int32 `json:"limit"`
	Offset    int32 `json:"offset"`
}

type ListTransfersParams 

type ListTransfersParams struct {
	FromAccountID int64 `json:"from_account_id"`
	ToAccountID   int64 `json:"to_account_id"`
	Limit         int32 `json:"limit"`
	Offset        int32 `json:"offset"`
}

type Querier 

type Querier interface {
	AddAccountBalance(ctx context.Context, arg AddAccountBalanceParams) (Account, error)
	CreateAccount(ctx context.Context, arg CreateAccountParams) (Account, error)
	CreateEntry(ctx context.Context, arg CreateEntryParams) (Entry, error)
	CreateTransfer(ctx context.Context, arg CreateTransferParams) (Transfer, error)
	CreateUser(ctx context.Context, arg CreateUserParams) (User, error)
	DeleteAccount(ctx context.Context, id int64) error
	GetAccount(ctx context.Context, id int64) (Account, error)
	GetAccountForUpdate(ctx context.Context, id int64) (Account, error)
	GetEntry(ctx context.Context, id int64) (Entry, error)
	GetTransfer(ctx context.Context, id int64) (Transfer, error)
	GetUser(ctx context.Context, username string) (User, error)
	ListAccounts(ctx context.Context, arg ListAccountsParams) ([]Account, error)
	ListEntries(ctx context.Context, arg ListEntriesParams) ([]Entry, error)
	ListTransfers(ctx context.Context, arg ListTransfersParams) ([]Transfer, error)
	UpdateAccount(ctx context.Context, arg UpdateAccountParams) (Account, error)
}

type Queries 

type Queries struct {
	// contains filtered or unexported fields
}

func New 

func New(db DBTX) *Queries

func (*Queries) AddAccountBalance 

func (q *Queries) AddAccountBalance(ctx context.Context, arg AddAccountBalanceParams) (Account, error)

func (*Queries) CreateAccount 

func (q *Queries) CreateAccount(ctx context.Context, arg CreateAccountParams) (Account, error)

func (*Queries) CreateEntry 

func (q *Queries) CreateEntry(ctx context.Context, arg CreateEntryParams) (Entry, error)

func (*Queries) CreateTransfer 

func (q *Queries) CreateTransfer(ctx context.Context, arg CreateTransferParams) (Transfer, error)

func (*Queries) CreateUser 

func (q *Queries) CreateUser(ctx context.Context, arg CreateUserParams) (User, error)

func (*Queries) DeleteAccount 

func (q *Queries) DeleteAccount(ctx context.Context, id int64) error

func (*Queries) GetAccount 

func (q *Queries) GetAccount(ctx context.Context, id int64) (Account, error)

func (*Queries) GetAccountForUpdate 

func (q *Queries) GetAccountForUpdate(ctx context.Context, id int64) (Account, error)

func (*Queries) GetEntry 

func (q *Queries) GetEntry(ctx context.Context, id int64) (Entry, error)

func (*Queries) GetTransfer 

func (q *Queries) GetTransfer(ctx context.Context, id int64) (Transfer, error)

func (*Queries) GetUser 

func (q *Queries) GetUser(ctx context.Context, username string) (User, error)

func (*Queries) ListAccounts 

func (q *Queries) ListAccounts(ctx context.Context, arg ListAccountsParams) ([]Account, error)

func (*Queries) ListEntries 

func (q *Queries) ListEntries(ctx context.Context, arg ListEntriesParams) ([]Entry, error)

func (*Queries) ListTransfers 

func (q *Queries) ListTransfers(ctx context.Context, arg ListTransfersParams) ([]Transfer, error)

func (*Queries) UpdateAccount 

func (q *Queries) UpdateAccount(ctx context.Context, arg UpdateAccountParams) (Account, error)

func (*Queries) WithTx 

func (q *Queries) WithTx(tx pgx.Tx) *Queries

type SLQStore 

type SLQStore struct {
	*Queries
	// contains filtered or unexported fields
}

SQLStore provides all functions to execute SQL queries and transactions

func (*SLQStore) TransferTx 

func (store *SLQStore) TransferTx(ctx context.Context, arg TransferTxParams) (TransferTxResult, error)

TransferTx performs a money transfer from one account to the other. It creates the transfer, add account entries, and update accounts' balance within a database transaction

type Store 

type Store interface {
	Querier
	TransferTx(ctx context.Context, arg TransferTxParams) (TransferTxResult, error)
}

Store defines all functions to execute db queries and transactions

func NewStore 

func NewStore(connPool *pgxpool.Pool) Store

type Transfer 

type Transfer struct {
	ID            int64 `json:"id"`
	FromAccountID int64 `json:"from_account_id"`
	ToAccountID   int64 `json:"to_account_id"`
	// must be positive
	Amount    int64              `json:"amount"`
	CreatedAt pgtype.Timestamptz `json:"created_at"`
}

type TransferTxParams 

type TransferTxParams struct {
	FromAccountID int64 `json:"from_account_id"`
	ToAccountID   int64 `json:"to_account_id"`
	Amount        int64 `json:"amount"`
}

TransferTxParams contains the input parameters of the transfer transaction

type TransferTxResult 

type TransferTxResult struct {
	Transfer    Transfer `json:"transfer"`
	FromAccount Account  `json:"from_account"`
	ToAccount   Account  `json:"to_account"`
	FromEntry   Entry    `json:"from_entry"`
	ToEntry     Entry    `json:"to_entry"`
}

TransferTxResult is the result of the transfer transaction

type UpdateAccountParams 

type UpdateAccountParams struct {
	ID      int64 `json:"id"`
	Balance int64 `json:"balance"`
}

type User 

type User struct {
	Username       string             `json:"username"`
	HashedPassword string             `json:"hashed_password"`
	FullName       string             `json:"full_name"`
	Email          string             `json:"email"`
	CreatedAt      pgtype.Timestamptz `json:"created_at"`
}

Source Files

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