1. change db to sqlc, 2.use repo for db drivers

internal/repository/driverrepo/driverrepo.go

@@ -0,0 +1,18 @@
+package driverrepo
+
+import (
+	"go-udemy-web-1/internal/repository"
+)
+
+type (
+	sqlDriverRepo  struct{}
+	sqlcDriverRepo struct{}
+)
+
+func NewSqlRepo() repository.DatabaseDriverRepo {
+	return &sqlDriverRepo{}
+}
+
+// func NewSqlcRepo() repository.DatabaseDriverRepo {
+// 	return &sqlcDriverRepo{}
+// }

internal/repository/driverrepo/sqldriver.go

@@ -0,0 +1,63 @@
+package driverrepo
+
+import (
+	"database/sql"
+	"go-udemy-web-1/internal/repository"
+	"time"
+
+	_ "github.com/jackc/pgconn"
+	_ "github.com/jackc/pgx/v5"
+	_ "github.com/jackc/pgx/v5/stdlib"
+)
+
+var dbConn = &repository.DB{}
+
+const (
+	maxOpenDbConn = 10
+	maxIdleDbConn = 5
+	maxDbLifetime = 5 * time.Minute
+)
+
+// ConnectSQL creates SQL pool for Postgres
+func (s *sqlDriverRepo) ConnectSQL(dsn string) (*repository.DB, error) {
+	d, err := newDatabase(dsn)
+	if err != nil {
+		panic(err)
+	}
+
+	d.SetMaxOpenConns(maxOpenDbConn)
+	d.SetMaxIdleConns(maxIdleDbConn)
+	d.SetConnMaxLifetime(maxDbLifetime)
+
+	dbConn.SQL = d
+
+	err = testDB(d)
+	if err != nil {
+		return nil, err
+	}
+	return dbConn, nil
+}
+
+// testDB tries to ping the database
+func testDB(d *sql.DB) error {
+	err := d.Ping()
+	if err != nil {
+		return err
+	}
+	return nil
+}
+
+// newDatabase creates a new database for the application
+func newDatabase(dsn string) (*sql.DB, error) {
+	db, err := sql.Open("pgx", dsn)
+	if err != nil {
+		return nil, err
+	}
+
+	// Ping test the conn
+	if err = db.Ping(); err != nil {
+		return nil, err
+	}
+
+	return db, err
+}