first commit

logging.go

@@ -0,0 +1,60 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+// Copyright (C) 2026 Bryan Joshua Pedini
+
+package main
+
+import (
+	"log/slog"
+	"net/http"
+	"os"
+	"time"
+)
+
+// NewLogger builds the process-wide structured logger, text output to
+// stdout, level driven by LOG_LEVEL.
+func NewLogger(level string) *slog.Logger {
+	var lvl slog.Level
+	switch level {
+	case "debug":
+		lvl = slog.LevelDebug
+	case "warn":
+		lvl = slog.LevelWarn
+	case "error":
+		lvl = slog.LevelError
+	default:
+		lvl = slog.LevelInfo
+	}
+
+	handler := slog.NewTextHandler(os.Stdout, &slog.HandlerOptions{Level: lvl})
+	return slog.New(handler)
+}
+
+// statusRecorder captures the status code written by downstream handlers so
+// the logging middleware can report it.
+type statusRecorder struct {
+	http.ResponseWriter
+	status int
+}
+
+func (r *statusRecorder) WriteHeader(status int) {
+	r.status = status
+	r.ResponseWriter.WriteHeader(status)
+}
+
+// loggingMiddleware logs method, path, status, and duration at info level
+// for every request.
+func (s *WebServer) loggingMiddleware(next http.Handler) http.Handler {
+	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		start := time.Now()
+		rec := &statusRecorder{ResponseWriter: w, status: http.StatusOK}
+
+		next.ServeHTTP(rec, r)
+
+		s.Logger.Info("request",
+			"method", r.Method,
+			"path", r.URL.Path,
+			"status", rec.status,
+			"duration", time.Since(start),
+		)
+	})
+}