package driver

import (
	"context"

	"github.com/gogf/gf/contrib/drivers/mysql/v2"
	"github.com/gogf/gf/v2/database/gdb"
	"github.com/gogf/gf/v2/os/gtime"
)

// MyDriver is a custom database driver, which is used for testing only.
// For simplifying the unit testing case purpose, MyDriver struct inherits the mysql driver
// gdb.Driver and overwrites its functions DoQuery and DoExec.
// So if there's any sql execution, it goes through MyDriver.DoQuery/MyDriver.DoExec firstly
// and then gdb.Driver.DoQuery/gdb.Driver.DoExec.
// You can call it sql "HOOK" or "HiJack" as your will.
type MyDriver struct {
	*mysql.Driver
}

var (
	// customDriverName is my driver name, which is used for registering.
	customDriverName = "MyDriver"
)

func init() {
	// It here registers my custom driver in package initialization function "init".
	// You can later use this type in the database configuration.
	if err := gdb.Register(customDriverName, &MyDriver{}); err != nil {
		panic(err)
	}
}

// New creates and returns a database object for mysql.
// It implements the interface of gdb.Driver for extra database driver installation.
func (d *MyDriver) New(core *gdb.Core, node *gdb.ConfigNode) (gdb.DB, error) {
	return &MyDriver{
		&mysql.Driver{
			Core: core,
		},
	}, nil
}

// DoCommit commits current sql and arguments to underlying sql driver.
func (d *MyDriver) DoCommit(ctx context.Context, in gdb.DoCommitInput) (out gdb.DoCommitOutput, err error) {
	tsMilliStart := gtime.TimestampMilli()
	out, err = d.Core.DoCommit(ctx, in)
	tsMilliFinished := gtime.TimestampMilli()
	_, _ = in.Link.ExecContext(ctx,
		"INSERT INTO `monitor`(`sql`,`cost`,`time`,`error`) VALUES(?,?,?,?)",
		gdb.FormatSqlWithArgs(in.Sql, in.Args),
		tsMilliFinished-tsMilliStart,
		gtime.Now(),
		err,
	)
	return
} 

驱动名称mysql为框架默认的DriverMysql驱动的名称。

database:
  default:
  - link: "MyDriver:root:12345678@tcp(127.0.0.1:3306)/user"