lightshowpi/main.go

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2020-12-03 23:08:46 -05:00
package main
import (
"context"
"fmt"
"io/ioutil"
"os"
"github.com/tblyler/lightshowpi/config"
"github.com/tblyler/lightshowpi/light"
"github.com/tblyler/lightshowpi/light/rpi"
"github.com/tblyler/lightshowpi/sound"
"golang.org/x/sync/errgroup"
)
func readConfig(filePath string) (*config.Config, error) {
file, err := os.Open(filePath)
if err != nil {
return nil, fmt.Errorf("failed to open %s: %w", filePath, err)
}
defer file.Close()
rawConfigData, err := ioutil.ReadAll(file)
if err != nil {
return nil, fmt.Errorf("failed to read config file %s: %w", filePath, err)
}
config, err := config.ParseConfig(rawConfigData)
if err != nil {
return nil, fmt.Errorf("failed to parse %s: %w", filePath, err)
}
return config, nil
}
func main() {
err := func() error {
cfg, err := readConfig("/etc/lightshowpi.toml")
if err != nil {
return err
}
piManager, err := rpi.NewManager(*cfg.RPIManagerConfig())
if err != nil {
return err
}
defer piManager.Close()
basicLights := map[string]light.BasicLight{}
for alias, info := range cfg.RaspberryPi.BasicLights {
basicLight, err := piManager.GetBasicLight(info.Pin)
if err != nil {
return fmt.Errorf("failed to get raspberry pi basic light %s for pin %d: %w", alias, info.Pin, err)
}
basicLights[alias] = basicLight
}
basicLightConductorSchedule, err := light.NewBasicLightConductorScheduleFromFile(cfg.LightSchedulePath)
if err != nil {
return err
}
basicLightConductor := light.NewBasicLightConductor(basicLights, basicLightConductorSchedule)
soundOuput := sound.NewFM(cfg.FMOutput)
errGroup, errGroupCtx := errgroup.WithContext(context.TODO())
errGroup.Go(func() error {
return basicLightConductor.Start(errGroupCtx)
})
errGroup.Go(func() error {
return soundOuput.Play(errGroupCtx, cfg.SongPath)
})
return errGroup.Wait()
}()
if err != nil {
fmt.Fprintln(os.Stderr, err)
os.Exit(1)
}
}