package main import ( "context" "fmt" "log/slog" "net/http" "os" "os/signal" "syscall" "time" "github.com/gin-contrib/cors" "github.com/gin-gonic/gin" "github.com/uptrace/bun/extra/bundebug" "git.savin.nyc/alex/go-receipt-tracker-api/config" "git.savin.nyc/alex/go-receipt-tracker-api/database" "git.savin.nyc/alex/go-receipt-tracker-api/handlers" ) var cfg = &config.Config{} const ( LoggingOutputJson = "JSON" LoggingOutputText = "TEXT" ) func configureLogging(config *config.Logging) *slog.Logger { //nolint:unparam if config == nil { return nil } var level slog.Level if err := level.UnmarshalText([]byte(config.Level)); err != nil { slog.Warn(err.Error()) slog.Warn(fmt.Sprintf("logging level not recognized, defaulting to level %s", slog.LevelInfo.String())) level = slog.LevelInfo } var handler slog.Handler switch config.Output { case LoggingOutputJson: handler = slog.NewJSONHandler(os.Stdout, &slog.HandlerOptions{AddSource: cfg.Logging.Source, Level: level}) case LoggingOutputText: handler = slog.NewTextHandler(os.Stdout, &slog.HandlerOptions{AddSource: cfg.Logging.Source, Level: level}) default: handler = slog.NewTextHandler(os.Stdout, &slog.HandlerOptions{AddSource: cfg.Logging.Source, Level: level}) } return slog.New(handler) } func main() { sigs := make(chan os.Signal, 1) done := make(chan bool, 1) signal.Notify(sigs, syscall.SIGINT, syscall.SIGTERM) go func() { <-sigs done <- true }() var err error cfg, err = config.New() if err != nil { // Handle errors reading the config file slog.Error("Fatal error config file", "error", err.Error()) os.Exit(1) } // LOGGER logger := configureLogging(cfg.Logging) logger.Debug("CONFIG", "config", cfg) // Create the "tasks" table in the database if it doesn't exist db, err := database.NewDB(cfg.DataBase, logger) if err != nil { logger.Error(err.Error()) os.Exit(1) } // Add a query hook for logging db.AddQueryHook(bundebug.NewQueryHook( bundebug.WithVerbose(true), bundebug.FromEnv("BUNDEBUG"), )) // Ping the database to test the connection err = db.Ping() if err != nil { logger.Debug("Failed to connect to the database") return } // Connection successful logger.Debug("Connected to the database") handlers.DB = db router := gin.Default() router.Use(cors.Default()) v1 := router.Group("/api/v1") { v1.GET("/", handlers.HomePage) v1.GET("/receipts", handlers.GetReceipts) v1.GET("/receipts/:id", handlers.GetReceipt) v1.DELETE("/receipts/:id", handlers.RemoveReceipt) v1.POST("/receipts", handlers.AddReceipt) v1.PUT("/receipts/:id", handlers.UpdateReceipt) v1.GET("/receipts/:id/items", handlers.GetItems) } srv := &http.Server{ Addr: ":8080", Handler: router.Handler(), } go func() { // service connections if err := srv.ListenAndServe(); err != nil && err != http.ErrServerClosed { logger.Error("cannot start ListenAndServe", "error", err) } }() <-done logger.Warn("caught signal, stopping...") ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second) defer cancel() if err := srv.Shutdown(ctx); err != nil { logger.Error("cannot shutdown server gracefully", "error", err) } logger.Info("main.go finished") }