Add basic webserver skeleton with healthcheck

internal/logger/logger.go

@@ -0,0 +1,77 @@
+// Package logger provides structured logging using slog.
+package logger
+
+import (
+	"log/slog"
+	"os"
+
+	"go.uber.org/fx"
+	"sneak.berlin/go/pixa/internal/globals"
+)
+
+// LoggerParams defines dependencies for Logger.
+type LoggerParams struct {
+	fx.In
+	Globals *globals.Globals
+}
+
+// Logger wraps slog with application-specific functionality.
+type Logger struct {
+	log     *slog.Logger
+	level   *slog.LevelVar
+	globals *globals.Globals
+}
+
+// New creates a new Logger instance.
+func New(lc fx.Lifecycle, params LoggerParams) (*Logger, error) {
+	l := &Logger{
+		level:   new(slog.LevelVar),
+		globals: params.Globals,
+	}
+	l.level.Set(slog.LevelInfo)
+
+	// TTY detection for dev vs prod output
+	tty := false
+	if fileInfo, _ := os.Stdout.Stat(); (fileInfo.Mode() & os.ModeCharDevice) != 0 {
+		tty = true
+	}
+
+	var handler slog.Handler
+	if tty {
+		// Text output for development
+		handler = slog.NewTextHandler(os.Stdout, &slog.HandlerOptions{
+			Level:     l.level,
+			AddSource: true,
+		})
+	} else {
+		// JSON output for production
+		handler = slog.NewJSONHandler(os.Stdout, &slog.HandlerOptions{
+			Level:     l.level,
+			AddSource: true,
+		})
+	}
+
+	l.log = slog.New(handler)
+
+	return l, nil
+}
+
+// EnableDebugLogging sets the log level to debug.
+func (l *Logger) EnableDebugLogging() {
+	l.level.Set(slog.LevelDebug)
+	l.log.Debug("debug logging enabled", "debug", true)
+}
+
+// Get returns the underlying slog.Logger.
+func (l *Logger) Get() *slog.Logger {
+	return l.log
+}
+
+// Identify logs application startup information.
+func (l *Logger) Identify() {
+	l.log.Info("starting",
+		"appname", l.globals.Appname,
+		"version", l.globals.Version,
+		"buildarch", l.globals.Buildarch,
+	)
+}