feat: initialize independent Sense product skeleton (#21)

Sense/server/cmd/sense/root.go

@@ -0,0 +1,79 @@
+package sense
+
+import (
+	"context"
+	"fmt"
+	"log/slog"
+	"net/http"
+	"os"
+	"os/signal"
+	"syscall"
+	"time"
+
+	"yovision.local/sense/internal/platform"
+)
+
+type moduleRegistrar func(*platform.App) error
+
+var moduleRegistrars []moduleRegistrar
+
+// registerModule is intentionally package-local. Feature integration files in
+// this directory append one registrar without changing the shared bootstrap.
+func registerModule(registrar moduleRegistrar) {
+	moduleRegistrars = append(moduleRegistrars, registrar)
+}
+
+func Run() error {
+	cfg, err := platform.LoadConfig()
+	if err != nil {
+		return err
+	}
+
+	logger := slog.New(slog.NewJSONHandler(os.Stdout, &slog.HandlerOptions{Level: cfg.LogLevel()}))
+	database, err := platform.OpenDatabase(context.Background(), cfg)
+	if err != nil {
+		return err
+	}
+	if database != nil {
+		defer database.Close()
+	}
+
+	app := platform.NewApp(cfg, database, logger)
+	for _, registrar := range moduleRegistrars {
+		if err := registrar(app); err != nil {
+			return fmt.Errorf("register Sense module: %w", err)
+		}
+	}
+	if err := app.ApplyMigrations(context.Background()); err != nil {
+		return err
+	}
+
+	server := &http.Server{
+		Addr:              cfg.HTTPAddress,
+		Handler:           app.Handler(),
+		ReadHeaderTimeout: 5 * time.Second,
+		ReadTimeout:       30 * time.Second,
+		WriteTimeout:      30 * time.Second,
+		IdleTimeout:       60 * time.Second,
+	}
+
+	errCh := make(chan error, 1)
+	go func() {
+		logger.Info("Sense server started", "address", cfg.HTTPAddress, "database_mode", cfg.DatabaseMode)
+		errCh <- server.ListenAndServe()
+	}()
+
+	stopCh := make(chan os.Signal, 1)
+	signal.Notify(stopCh, syscall.SIGINT, syscall.SIGTERM)
+	select {
+	case <-stopCh:
+		ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
+		defer cancel()
+		return server.Shutdown(ctx)
+	case serveErr := <-errCh:
+		if serveErr == http.ErrServerClosed {
+			return nil
+		}
+		return serveErr
+	}
+}