Second checkpoint

internal/transport/http/router.go

@@ -0,0 +1,42 @@
+package http
+
+import (
+	"log/slog"
+	"net/http"
+
+	"github.com/go-chi/chi/v5"
+	"github.com/go-chi/chi/v5/middleware"
+)
+
+// RouterDeps holds the handlers and dependencies the router mounts.
+type RouterDeps struct {
+	Logger      *slog.Logger
+	Health      *HealthHandler
+	Categories  *CategoryHandler
+	Datasets    *DatasetHandler
+	OpenAPISpec []byte
+}
+
+// NewRouter builds the application's HTTP handler with middleware and routes.
+func NewRouter(deps RouterDeps) http.Handler {
+	r := chi.NewRouter()
+
+	r.Use(middleware.RequestID)
+	r.Use(middleware.RealIP)
+	r.Use(requestLogger(deps.Logger))
+	r.Use(middleware.Recoverer)
+
+	// Health/readiness endpoints.
+	r.Get("/healthz", deps.Health.Live)
+	r.Get("/readyz", deps.Health.Ready)
+
+	// OpenAPI 3.1.1 spec + Redoc documentation UI.
+	r.Get("/openapi.yaml", deps.openAPISpec)
+	r.Get("/docs", docsUI)
+
+	// Domain routes. Add future feature routers here.
+	r.Route("/categories", deps.Categories.Register)
+	r.Route("/datasets", deps.Datasets.Register)
+
+	return r
+}