OOP_GO.go

package main

import "fmt"

//-------------------- ABSTRACT INTERFACES --------------------

type WaterAbsorber interface {
	Pour(num int)
	TotalLiquid() int
}
type WaterSource interface {
	WaterAbsorber
	PourOut()
}

//-------------------- CONCRECT CLASSES --------------------------

type Human struct {
	liquid int
}
func (h Human) TotalLiquid() int {
	return h.liquid
}
func (h *Human) Pour(num int) {
	h.liquid += num
}

type Cat struct {
	liquid int
}
func (c Cat) TotalLiquid() int {
	return c.liquid
}
func (c *Cat) Pour(num int) {
	c.liquid += num
}

type Cup struct {
	liquid int
}
func (c Cup) TotalLiquid() int {
	return c.liquid
}
func (c *Cup) Pour(num int) {
	c.liquid += num
}
func (c *Cup) PourOut() {
	c.liquid = 0
}

//-------------------- IMPLEMENTATION THE ABILITY TO "DRINK" FOR CLASS INSTANCES --------------------------

func drink(wa WaterAbsorber, ws WaterSource) {
	wa.Pour(ws.TotalLiquid())
	ws.PourOut()
}

//-------------------- MAIN --------------------------

func main() {
	human := &Human{4}
	cup := &Cup{7}
	drink(human, cup)
	fmt.Println("Human liquid level: ", human.TotalLiquid())
	fmt.Println("Cup liquid level: ", cup.TotalLiquid())
	fmt.Println("____________________________________")
	new_cup := &Cup{23}
	drink(cup, new_cup)
	fmt.Println("Cup liquid level: ", cup.TotalLiquid())
	fmt.Println("New cup liquid level: ", new_cup.TotalLiquid())
}