added postgres conn pool

src/core/repos/action_token.go

@@ -2,8 +2,8 @@ package repos
 
 import (
 	"backend/src/core/models"
+	"backend/src/integrations"
 	"context"
-	"database/sql"
 )
 
 type ActionTokenRepo interface {
@@ -11,14 +11,14 @@ type ActionTokenRepo interface {
 	PopActionToken(ctx context.Context, userId, value string, target models.ActionTokenTarget) (*models.ActionTokenDTO, error)
 }
 
-func NewActionTokenRepo(db *sql.DB) ActionTokenRepo {
+func NewActionTokenRepo(db integrations.SqlDB) ActionTokenRepo {
 	return &actionTokenRepo{
 		db: db,
 	}
 }
 
 type actionTokenRepo struct {
-	db *sql.DB
+	db integrations.SqlDB
 }
 
 func (a *actionTokenRepo) CreateActionToken(ctx context.Context, dto models.ActionTokenDTO) (*models.ActionTokenDTO, error) {

src/core/repos/user_repo.go

@@ -2,6 +2,7 @@ package repos
 
 import (
 	"backend/src/core/models"
+	"backend/src/integrations"
 	"context"
 	"database/sql"
 	"errors"
@@ -21,12 +22,12 @@ type UserRepo interface {
 	GetUserByEmail(ctx context.Context, login string) (*models.UserDTO, error)
 }
 
-func NewUserRepo(db *sql.DB) UserRepo {
+func NewUserRepo(db integrations.SqlDB) UserRepo {
 	return &userRepo{db}
 }
 
 type userRepo struct {
-	db *sql.DB
+	db integrations.SqlDB
 }
 
 func (u *userRepo) CreateUser(ctx context.Context, dto models.UserDTO) (*models.UserDTO, error) {

src/integrations/postgresql.go

@@ -3,23 +3,65 @@ package integrations
 import (
 	"context"
 	"database/sql"
+	"database/sql/driver"
 	"fmt"
+	"net/url"
+	"time"
 
-	"github.com/jackc/pgx"
-	"github.com/jackc/pgx/stdlib"
+	"github.com/jackc/pgx/v5/pgxpool"
+	"github.com/jackc/pgx/v5/stdlib"
 )
 
-// TODO: wrapper, connection pool
-func NewPostgresConn(ctx context.Context, connUrl string) (*sql.DB, error) {
-	connConf, err := pgx.ParseConnectionString(connUrl)
+type SqlDB interface {
+	Begin() (*sql.Tx, error)
+	BeginTx(ctx context.Context, opts *sql.TxOptions) (*sql.Tx, error)
+	Close() error
+	Conn(ctx context.Context) (*sql.Conn, error)
+	Driver() driver.Driver
+	Exec(query string, args ...any) (sql.Result, error)
+	ExecContext(ctx context.Context, query string, args ...any) (sql.Result, error)
+	Ping() error
+	PingContext(ctx context.Context) error
+	Prepare(query string) (*sql.Stmt, error)
+	PrepareContext(ctx context.Context, query string) (*sql.Stmt, error)
+	Query(query string, args ...any) (*sql.Rows, error)
+	QueryContext(ctx context.Context, query string, args ...any) (*sql.Rows, error)
+	QueryRow(query string, args ...any) *sql.Row
+	QueryRowContext(ctx context.Context, query string, args ...any) *sql.Row
+	SetConnMaxIdleTime(d time.Duration)
+	SetConnMaxLifetime(d time.Duration)
+	SetMaxIdleConns(n int)
+	SetMaxOpenConns(n int)
+	Stats() sql.DBStats
+}
+
+type Postgres struct {
+	*sql.DB
+	pool *pgxpool.Pool
+}
+
+func NewPostgresConn(ctx context.Context, postgresUrl string) (SqlDB, error) {
+	connUrl, err := url.Parse(postgresUrl)
 	if err != nil {
-		return nil, fmt.Errorf("failed parsing postgres connection string: %v", err)
+		return nil, err
 	}
 
-	sqlDb := stdlib.OpenDB(connConf)
-	if err := sqlDb.PingContext(ctx); err != nil {
+	query, _ := url.ParseQuery(connUrl.RawQuery)
+	query.Set("pool_max_conns", "16")
+	connUrl.RawQuery = query.Encode()
+
+	pool, err := pgxpool.New(ctx, connUrl.String())
+	if err != nil {
+		return nil, err
+	}
+
+	db := stdlib.OpenDBFromPool(pool)
+	if err := db.PingContext(ctx); err != nil {
 		return nil, fmt.Errorf("failed pinging postgres db: %v", err)
 	}
 
-	return sqlDb, nil
+	return &Postgres{
+		DB:   db,
+		pool: pool,
+	}, nil
 }