Add Zap logging framework with structured logging for Echo and Grafana

internal/server/server.go

@@ -2,12 +2,15 @@ package server
 
 import (
 	"fmt"
-	"log"
-	"music-server/internal/db"
-	"net/http"
 	"os"
 	"strconv"
 	"time"
+
+	"music-server/internal/db"
+	"music-server/internal/logging"
+	"net/http"
+
+	"go.uber.org/zap"
 )
 
 type Server struct {
@@ -22,24 +25,39 @@ var (
 	password       = os.Getenv("DB_PASSWORD")
 	musicPath      = os.Getenv("MUSIC_PATH")
 	charactersPath = os.Getenv("CHARACTERS_PATH")
+	logLevel       = os.Getenv("LOG_LEVEL")
+	logJSON        = os.Getenv("LOG_JSON") == "true"
 )
 
 func NewServer() *http.Server {
+	// Initialize logger
+	if logLevel == "" {
+		logLevel = "info"
+	}
+	logging.Init(logLevel, logJSON)
+
+	logger := logging.GetLogger()
 
 	port, _ := strconv.Atoi(os.Getenv("PORT"))
 	NewServer := &Server{
 		port: port,
 	}
 
-	fmt.Printf("host: %s, dbPort: %v, username: %s, password: %s, dbName: %s\n",
-		host, dbPort, username, password, dbName)
+	logger.Info("Starting server",
+		zap.String("host", host),
+		zap.String("dbPort", dbPort),
+		zap.String("username", username),
+		zap.String("dbName", dbName),
+	)
 
-	log.Printf("musicPath: %s\n", musicPath)
-	log.Printf("charactersPath: %s\n", charactersPath)
+	logger.Info("Paths",
+		zap.String("musicPath", musicPath),
+		zap.String("charactersPath", charactersPath),
+	)
 
 	//conf.SetupDb()
 	if host == "" || dbPort == "" || username == "" || password == "" || dbName == "" || musicPath == "" || charactersPath == "" {
-		log.Fatal("Invalid settings")
+		logging.GetLogger().Fatal("Invalid settings - missing required environment variables")
 	}
 
 	db.Migrate_db(host, dbPort, username, password, dbName)