boilerplate code

internal/iot/logger.go

@@ -0,0 +1,67 @@
+package iot
+
+import (
+	"fmt"
+	"io"
+	"log/slog"
+	"os"
+	"strings"
+	"time"
+)
+
+var (
+	logFile *os.File
+)
+
+func newLogger(environment string) {
+	if err := os.MkdirAll("logs", 0755); err != nil {
+		fmt.Println("error creating logs directory:", err)
+		return
+	}
+
+	now := time.Now().Format("2006-01-02")
+	f, err := os.OpenFile(fmt.Sprintf("logs/log%s.log", now), os.O_RDWR|os.O_CREATE|os.O_APPEND, 0666)
+	if err != nil {
+		fmt.Println("error opening log file:", err)
+		return
+	}
+
+	var level slog.Level
+	var addSource bool
+
+	switch strings.ToLower(environment) {
+	case "dev":
+		level = slog.LevelDebug // -4
+		addSource = true
+	case "prod":
+		level = slog.LevelInfo // 0
+		addSource = false
+	default:
+		level = slog.LevelInfo
+		addSource = false
+	}
+
+	mw := io.MultiWriter(os.Stdout, f)
+	logger := slog.New(slog.NewTextHandler(mw, &slog.HandlerOptions{
+		AddSource: addSource,
+		Level:     level,
+	}))
+
+	if logFile != nil {
+		logFile.Close()
+	}
+
+	logFile = f
+	slog.SetDefault(logger)
+}
+
+func startRotativeLogger(environment string) {
+	newLogger(environment)
+
+	ticker := time.NewTicker(time.Hour * 24)
+	go func() {
+		for range ticker.C {
+			newLogger(environment)
+		}
+	}()
+}