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dbutils.go
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dbutils.go
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package dbutils
import (
"errors"
"fmt"
"log"
"github.com/disturb16/go-sqlite-service/settings"
"github.com/jmoiron/sqlx"
_ "github.com/mattn/go-sqlite3"
)
var (
// ErrInvalidDBEngine database engine is not supported
ErrInvalidDBEngine = errors.New("uUnsoported or missing database engine")
)
func New(config *settings.Settings) (*sqlx.DB, error) {
var db *sqlx.DB
var err error
dbConfig := config.DB
switch dbConfig.Engine {
case "mysql":
db, err = CreateMySqlConnection(config)
case "sqlite":
db, err = CreateSqliteConnection(config)
default:
err = ErrInvalidDBEngine
}
return db, err
}
func CreateMySqlConnection(config *settings.Settings) (*sqlx.DB, error) {
var connectionString string
var db *sqlx.DB
var err error
dbConfig := config.DB
connectionString = fmt.Sprintf(
"%s:%s@tcp(%s:%d)/%s?parseTime=true",
dbConfig.User,
dbConfig.Password,
dbConfig.Host,
dbConfig.Port,
dbConfig.Name)
log.Println("Trying to connect to database...")
db, err = sqlx.Open("mysql", connectionString)
if err != nil {
return nil, err
}
err = db.Ping()
if err != nil {
return nil, err
}
log.Println("Connected to database")
return db, nil
}
func CreateSqliteConnection(config *settings.Settings) (*sqlx.DB, error) {
source := fmt.Sprintf("./%s.db", config.DB.Name)
db, err := sqlx.Open("sqlite3", source)
if err != nil {
return nil, err
}
err = db.Ping()
if err != nil {
return nil, err
}
return db, nil
}