Initial commit

internal/server/server.go

@@ -0,0 +1,63 @@
+package server
+
+import (
+	"context"
+	"io/fs"
+	"log/slog"
+	"net/http"
+	"time"
+)
+
+type Server struct {
+	httpServer *http.Server
+	log        *slog.Logger
+}
+
+// New creates an HTTP server that serves the embedded frontend and a health
+// check endpoint. Additional routes (API, WebSocket) will be registered in
+// later phases.
+func New(addr string, webFS fs.FS, log *slog.Logger) *Server {
+	mux := http.NewServeMux()
+
+	// Health check
+	mux.HandleFunc("/healthz", func(w http.ResponseWriter, r *http.Request) {
+		w.WriteHeader(http.StatusOK)
+		_, _ = w.Write([]byte("ok"))
+	})
+
+	// Serve embedded frontend for everything else
+	mux.Handle("/", http.FileServerFS(webFS))
+
+	return &Server{
+		httpServer: &http.Server{
+			Addr:         addr,
+			Handler:      mux,
+			ReadTimeout:  10 * time.Second,
+			WriteTimeout: 30 * time.Second,
+			IdleTimeout:  120 * time.Second,
+		},
+		log: log,
+	}
+}
+
+// Start listens and serves until ctx is cancelled.
+func (s *Server) Start(ctx context.Context) error {
+	s.log.Info("listening", "addr", s.httpServer.Addr)
+
+	errCh := make(chan error, 1)
+	go func() {
+		if err := s.httpServer.ListenAndServe(); err != nil && err != http.ErrServerClosed {
+			errCh <- err
+		}
+	}()
+
+	select {
+	case err := <-errCh:
+		return err
+	case <-ctx.Done():
+		shutCtx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
+		defer cancel()
+		s.log.Info("shutting down")
+		return s.httpServer.Shutdown(shutCtx)
+	}
+}