db

package
v0.0.0-...-d5ed05a Latest Latest
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 Go to latest Published: Jul 12, 2022 License: MIT Imports: 5 Imported by: 0

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Constants

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Variables

This section is empty.

Functions

This section is empty.

Types

type Account 

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

type AddAccountbalanceParams 

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

type CreateAccountParams 

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

type CreateEntryParams 

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

type CreateSessionParams 

type CreateSessionParams struct {
	ID           uuid.UUID `json:"id"`
	Username     string    `json:"username"`
	RefreshToken string    `json:"refresh_token"`
	UserAgent    string    `json:"user_agent"`
	ClientID     string    `json:"client_id"`
	IsBlocked    bool      `json:"is_blocked"`
	ExpiresAt    time.Time `json:"expires_at"`
}

type CreateTransferParams 

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

type CreateUserParams 

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

type DBTX 

type DBTX interface {
	ExecContext(context.Context, string, ...interface{}) (sql.Result, error)
	PrepareContext(context.Context, string) (*sql.Stmt, error)
	QueryContext(context.Context, string, ...interface{}) (*sql.Rows, error)
	QueryRowContext(context.Context, string, ...interface{}) *sql.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 time.Time `json:"created_at"`
}

type ListAccountsParams 

type ListAccountsParams struct {
	Owner  string `json:"owner"`
	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)
	CreateSession(ctx context.Context, arg CreateSessionParams) (Session, 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)
	// FOR UPDATE;  -- this is necessary when we are working with multithread (if some thread started a transaction, it will wait the transaction to finish before do the select and it will get the actual value)
	GetAccountForUpdate(ctx context.Context, id int64) (Account, error)
	GetEntry(ctx context.Context, id int64) (Entry, error)
	GetSession(ctx context.Context, id uuid.UUID) (Session, error)
	GetTransfer(ctx context.Context, id int64) (Transfer, error)
	GetUser(ctx context.Context, username string) (User, error)
	// FOR UPDATE only do not solve our problema because we got deadlock when the account id is used to update the balance, it generates lock, so we tell to database that we won't update the account id (we just use as WHERE condition)
	// pagination
	ListAccounts(ctx context.Context, arg ListAccountsParams) ([]Account, error)
	// paginatiin
	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) CreateSession 

func (q *Queries) CreateSession(ctx context.Context, arg CreateSessionParams) (Session, 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)

FOR UPDATE; -- this is necessary when we are working with multithread (if some thread started a transaction, it will wait the transaction to finish before do the select and it will get the actual value)

func (*Queries) GetEntry 

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

func (*Queries) GetSession 

func (q *Queries) GetSession(ctx context.Context, id uuid.UUID) (Session, 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)

FOR UPDATE only do not solve our problema because we got deadlock when the account id is used to update the balance, it generates lock, so we tell to database that we won't update the account id (we just use as WHERE condition) pagination

func (*Queries) ListEntries 

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

paginatiin

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 *sql.Tx) *Queries

type SQLStore 

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

SQLStore provides all functions to execute SQL queries and transactions

func (*SQLStore) TransferTx 

func (store *SQLStore) 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 Session 

type Session struct {
	ID           uuid.UUID `json:"id"`
	Username     string    `json:"username"`
	RefreshToken string    `json:"refresh_token"`
	UserAgent    string    `json:"user_agent"`
	ClientID     string    `json:"client_id"`
	IsBlocked    bool      `json:"is_blocked"`
	ExpiresAt    time.Time `json:"expires_at"`
	CreatedAt    time.Time `json:"created_at"`
}

type Store 

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

func NewStore 

func NewStore(db *sql.DB) 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 time.Time `json:"created_at"`
}

type TransferTxParams 

type TransferTxParams struct {
	FromAccountID int64
	ToAccountID   int64
	Amount        int64
}

type TransferTxResult 

type TransferTxResult struct {
	Transfer    Transfer
	FromAccount Account
	ToAccount   Account
	FromEntry   Entry
	ToEntry     Entry
}

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"`
	PasswordChangedAt time.Time `json:"password_changed_at"`
	CreatedAt         time.Time `json:"created_at"`
}

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