Merge: structured logging (slog)

internal/grpcserver/server.go

@@ -4,6 +4,7 @@ import (
 	"crypto/tls"
 	"database/sql"
 	"fmt"
+	"log/slog"
 	"net"
 
 	pb "git.wntrmute.dev/kyle/eng-pad-server/gen/engpad/v1"
@@ -46,7 +47,7 @@ func Start(cfg Config) (*grpc.Server, error) {
 	syncSvc := &SyncService{DB: cfg.DB, BaseURL: cfg.BaseURL}
 	pb.RegisterEngPadSyncServer(srv, syncSvc)
 
-	fmt.Printf("gRPC listening on %s\n", cfg.Addr)
+	slog.Info("gRPC server started", "addr", cfg.Addr)
 	go func() { _ = srv.Serve(lis) }()
 
 	return srv, nil

internal/log/log.go

@@ -0,0 +1,23 @@
+package log
+
+import (
+	"log/slog"
+	"os"
+	"strings"
+)
+
+func Init(level string) {
+	var lvl slog.Level
+	switch strings.ToLower(level) {
+	case "debug":
+		lvl = slog.LevelDebug
+	case "warn":
+		lvl = slog.LevelWarn
+	case "error":
+		lvl = slog.LevelError
+	default:
+		lvl = slog.LevelInfo
+	}
+	handler := slog.NewJSONHandler(os.Stderr, &slog.HandlerOptions{Level: lvl})
+	slog.SetDefault(slog.New(handler))
+}

internal/server/server.go

@@ -4,6 +4,7 @@ import (
 	"crypto/tls"
 	"database/sql"
 	"fmt"
+	"log/slog"
 	"net/http"
 	"time"
 
@@ -42,7 +43,7 @@ func Start(cfg Config) (*http.Server, error) {
 		IdleTimeout:  120 * time.Second,
 	}
 
-	fmt.Printf("REST API listening on %s\n", cfg.Addr)
+	slog.Info("REST API started", "addr", cfg.Addr)
 	go func() { _ = srv.ListenAndServeTLS("", "") }()
 
 	return srv, nil

internal/webserver/server.go

@@ -6,6 +6,7 @@ import (
 	"fmt"
 	"html/template"
 	"io/fs"
+	"log/slog"
 	"net/http"
 	"time"
 
@@ -85,10 +86,10 @@ func Start(cfg Config) (*http.Server, error) {
 			Certificates: []tls.Certificate{tlsCert},
 			MinVersion:   tls.VersionTLS13,
 		}
-		fmt.Printf("Web UI listening on %s (TLS)\n", cfg.Addr)
+		slog.Info("web UI started", "addr", cfg.Addr, "tls", true)
 		go func() { _ = srv.ListenAndServeTLS("", "") }()
 	} else {
-		fmt.Printf("Web UI listening on %s\n", cfg.Addr)
+		slog.Info("web UI started", "addr", cfg.Addr, "tls", false)
 		go func() { _ = srv.ListenAndServe() }()
 	}