package main

import "fmt"

type Location struct {
	System, Planet string
	node_s, node_p *Node
}

func (l *Location) Type() string {
	return "Location"
}

func (l *Location) String() string {
	return fmt.Sprintf("%s, %s", l.Planet, l.System)
}

func (l *Location) Parse(node *Node) error {
	switch node.Key() {
	case "system":
		l.System = node.Value()
		l.node_s = node
	case "planet":
		l.Planet = node.Value()
		l.node_p = node
	}
	return nil
}

func (l *Location) Update() error {
	if l.node_s == nil || l.node_p == nil {
		return fmt.Errorf("location invalidated, system or planet node pointers are nil")
	}
	l.node_s.SetValue(l.System)
	l.node_p.SetValue(l.Planet)
	return nil
}