jopa_test.go

type Map struct {
	Vals  [8][8]int
	Users []UserHui
}

type UserHui struct {
	Name       string
	Coordinate int
}

type EnumCoordinate uint8

const (
	North EnumCoordinate = iota
	West
	South
	East
)

var (
	ErrTakeStep = errors.New("err take step")
)

func (self *UserHui) Step(destination EnumCoordinate) (currentCoordinate int, err error) {
	switch destination {
	case North:
		currentCoordinate = self.Coordinate - 8
	case West:
		currentCoordinate = self.Coordinate - 1
	case South:
		currentCoordinate = self.Coordinate + 8
	case East:
		currentCoordinate = self.Coordinate + 1
	}

	if currentCoordinate <= 0 || currentCoordinate > 64 {
		return 0, ErrTakeStep
	}

	return currentCoordinate, nil
}

func j() {
	user1 := UserHui{
		Name:       "Edgar",
		Coordinate: 11,
	}
	user2 := UserHui{
		Name:       "Vika",
		Coordinate: 4,
	}

	v := Map{
		Vals: [8][8]int{
			{1, 2, 3, 4, 5, 6, 7, 8},
			{9, 10, 11, 12, 13, 14, 15, 16},
			{1, 2, 3, 4, 5, 6, 7, 8},
			{1, 2, 3, 4, 5, 6, 7, 8},
			{1, 2, 3, 4, 5, 6, 7, 8},
			{1, 2, 3, 4, 5, 6, 7, 8},
			{1, 2, 3, 4, 5, 6, 7, 8},
			{1, 2, 3, 4, 5, 6, 7, 8},
		},
		Users: []UserHui{user1, user2},
	}
}