interfaces FTW

interfaces.go

// https://www.reddit.com/r/golang/comments/852i6m/about_to_switch_to_python_because_ive_hit_a_brick/?ref=share&ref_source=link
package main

import "errors"

const (
	MonsterType = iota
	CookingRecipeType
	InventoryItemType
)

type datastore struct {
	// mock db
}

type Row struct {
	// mock
}

func (d *datastore) Query(q string, args ...interface{}) Row {
	// mock
	return Row{}
}

func (Row) Scan(args ...interface{}) {
	// mock
	return
}

var db = datastore{}

type AdminResource interface {
	GetDetails(int)
}

type MonsterResource struct {
	TotalHP   int
	CurrentHP int
}

func (m MonsterResource) GetDetails(resid int) {
	db.Query("SELECT total_hp, current_hp FROM monsters WHERE resource_id = ?", resid).Scan(
		&m.TotalHP, &m.CurrentHP)
}

func GetResource(id int) AdminResource {
	var resID int
	var resType int
	db.Query("SELECT id, resource_type FROM admin_resources WHERE id = ?", id).Scan(
		&resID, &resType)

	out, err := GetResourceType(resType)
	if err != nil {
		// handle err
	}

	out.GetDetails(resID)
	return out
}

func GetResourceType(resType int) (AdminResource, error) {
	switch resType {
	case MonsterType:
		return MonsterResource{}, nil
	case CookingRecipeType:
		// do something
	case InventoryItemType:
		// do something
	}

	return nil, errors.New("invalid resource type")
}

func main() {

}