initial commit

main.go

@@ -0,0 +1,104 @@
+package main
+
+import (
+	"context"
+	"flag"
+	"fmt"
+	"log"
+	"os"
+	"os/signal"
+	"syscall"
+
+	"led-controller/config"
+	"led-controller/controller"
+	"led-controller/monitor"
+)
+
+func main() {
+	cfgPath := flag.String("config", "/etc/led-controller/config.toml", "path to config file")
+	flag.Parse()
+
+	args := flag.Args()
+
+	cfg, err := config.Load(*cfgPath)
+	if err != nil {
+		log.Fatalf("failed to load config: %v", err)
+	}
+
+	// Manual toggle: led-controller [--config ...] on|off
+	if len(args) > 0 {
+		switch args[0] {
+		case "on", "off":
+			ctrl, err := controller.New(cfg)
+			if err != nil {
+				log.Fatalf("failed to create controller: %v", err)
+			}
+			defer ctrl.Close()
+
+			on := args[0] == "on"
+			if err := ctrl.SetLEDs(on); err != nil {
+				log.Fatalf("failed to set LEDs %s: %v", args[0], err)
+			}
+			fmt.Printf("LEDs turned %s\n", args[0])
+			return
+		case "daemon":
+			// fall through to daemon mode below
+		default:
+			fmt.Fprintf(os.Stderr, "usage: led-controller [--config path] [on|off|daemon]\n")
+			os.Exit(1)
+		}
+	}
+
+	// Daemon mode
+	log.Printf("led-controller starting (relay=%s)", cfg.Relay.Device)
+
+	ctrl, err := controller.New(cfg)
+	if err != nil {
+		log.Fatalf("failed to create controller: %v", err)
+	}
+	defer ctrl.Close()
+
+	// Turn LEDs on at startup — the display is on if we're booting
+	log.Println("startup — enabling LEDs")
+	if err := ctrl.SetLEDs(true); err != nil {
+		log.Printf("error enabling LEDs at startup: %v", err)
+	}
+
+	ctx, cancel := context.WithCancel(context.Background())
+	defer cancel()
+
+	sigCh := make(chan os.Signal, 1)
+	signal.Notify(sigCh, syscall.SIGINT, syscall.SIGTERM)
+
+	events := make(chan monitor.Event, 16)
+	mon, err := monitor.New(cfg, events)
+	if err != nil {
+		log.Fatalf("failed to create monitor: %v", err)
+	}
+
+	go mon.Run(ctx)
+
+	log.Println("daemon running, waiting for display events")
+
+	for {
+		select {
+		case ev := <-events:
+			switch ev {
+			case monitor.DisplayOn:
+				log.Println("display ON — enabling LEDs")
+				if err := ctrl.SetLEDs(true); err != nil {
+					log.Printf("error enabling LEDs: %v", err)
+				}
+			case monitor.DisplayOff:
+				log.Println("display OFF — disabling LEDs")
+				if err := ctrl.SetLEDs(false); err != nil {
+					log.Printf("error disabling LEDs: %v", err)
+				}
+			}
+		case sig := <-sigCh:
+			log.Printf("received %v, shutting down", sig)
+			cancel()
+			return
+		}
+	}
+}