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solar_system.go
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/
solar_system.go
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package spacegame
import (
"encoding/json"
"os"
)
type SolarSystem struct {
name string
celestials []Celestial
}
type SolarSystemConfig struct {
Name string
Celestials []CelestialConfig
}
func (s SolarSystem) Config() SolarSystemConfig {
return SolarSystemConfig{
Name: s.name,
Celestials: CelestialCollection(s.celestials).Config(),
}
}
func NewSolarSystem(name string, celestials ...Celestial) *SolarSystem {
s := SolarSystem{
name: name,
celestials: celestials,
}
return &s
}
func LoadSystem(path string) (*SolarSystem, error) {
file, err := os.Open(path)
if err != nil {
return nil, err
}
var solarSystemConfig SolarSystemConfig
decoder := json.NewDecoder(file)
decoder.Decode(&solarSystemConfig)
return solarSystemConfig.load(), nil
}
func (config SolarSystemConfig) load() *SolarSystem {
var celestials []Celestial
for _, c := range config.Celestials {
celestial := NewCelestial(c.Name, c.ImagePath, c.Coordinates)
celestials = append(celestials, celestial)
}
system := &SolarSystem{
name: config.Name,
celestials: celestials,
}
return system
}
func (s SolarSystem) SaveToFile(path string) error {
file, err := os.Create(path)
if err != nil {
return err
}
encoder := json.NewEncoder(file)
encoder.SetIndent("", " ")
encoder.Encode(s.Config())
return nil
}
func (s SolarSystem) Name() string {
return s.name
}
func (s SolarSystem) Celestials() []Celestial {
return s.celestials
}