Add basic logger

cmd/main.go

@@ -2,17 +2,24 @@ package cmd
 
 import (
 	"fmt"
+	"log"
 	"os"
 
 	tea "github.com/charmbracelet/bubbletea"
 	"github.com/zMoooooritz/nachrichten/pkg/config"
 	"github.com/zMoooooritz/nachrichten/pkg/tui"
+	"github.com/zMoooooritz/nachrichten/pkg/util"
 )
 
 func Run() {
 
 	cfg := config.Init()
 	configuration := cfg.Load()
+	if cfg.LogFile != "" {
+		err := util.SetLogFile(cfg.LogFile)
+		log.Fatalln("Error occoured while setting up logger: ", err)
+	}
+	util.Logger.Println("Application started.")
 
 	p := tea.NewProgram(tui.InitialModel(configuration),
 		tea.WithAltScreen(),

pkg/config/config.go

@@ -51,24 +51,27 @@ const (
 )
 
 type Config struct {
-	file string
+	ConfigFile string
+	LogFile    string
 }
 
 func Init() Config {
 
-	configFile := flag.String("config", "~/.config/nachrichten/config.yaml", "Path to configuration file")
+	configFile := flag.String("config", "", "Path to configuration file")
+	logFile := flag.String("debug", "", "Path to log file")
 
 	flag.Parse()
 	cfg := Config{
-		file: *configFile,
+		ConfigFile: *configFile,
+		LogFile:    *logFile,
 	}
 	return cfg
 }
 
 func (c Config) Load() Configuration {
 	config := defaultConfiguration()
 
-	data, err := os.ReadFile(c.file)
+	data, err := os.ReadFile(c.ConfigFile)
 	if err != nil {
 		return config
 	}

pkg/util/logger.go

@@ -0,0 +1,32 @@
+package util
+
+import (
+	"io"
+	"log"
+	"os"
+	"path/filepath"
+)
+
+var Logger *log.Logger
+
+func init() {
+	Logger = log.New(io.Discard, "LOG: ", log.Ldate|log.Ltime|log.Lshortfile)
+}
+
+func SetLogFile(filePath string) error {
+	directory := filepath.Dir(filePath)
+	err := os.MkdirAll(directory, os.ModePerm)
+	if err != nil {
+		log.Fatalln("Error dir")
+		return err
+	}
+
+	file, err := os.OpenFile(filePath, os.O_CREATE|os.O_WRONLY|os.O_APPEND, 0666)
+	if err != nil {
+		log.Fatalln("Error file")
+		return err
+	}
+
+	Logger.SetOutput(file)
+	return nil
+}