fix: move implementation to "internal" package

internal/handler/root_and_404.go

@@ -0,0 +1,57 @@
+package handler
+
+import (
+	"net/http"
+	"spend-sparrow/internal/handler/middleware"
+	"spend-sparrow/internal/template"
+
+	"github.com/a-h/templ"
+)
+
+type Index interface {
+	Handle(router *http.ServeMux)
+}
+
+type IndexImpl struct {
+	render *Render
+}
+
+func NewIndex(render *Render) Index {
+	return IndexImpl{
+		render: render,
+	}
+}
+
+func (handler IndexImpl) Handle(router *http.ServeMux) {
+	router.Handle("/", handler.handleRootAnd404())
+	router.Handle("/empty", handler.handleEmpty())
+}
+
+func (handler IndexImpl) handleRootAnd404() http.HandlerFunc {
+	return func(w http.ResponseWriter, r *http.Request) {
+		user := middleware.GetUser(r)
+
+		var comp templ.Component
+
+		var status int
+		if r.URL.Path != "/" {
+			comp = template.NotFound()
+			status = http.StatusNotFound
+		} else {
+			if user != nil {
+				comp = template.Dashboard()
+			} else {
+				comp = template.Index()
+			}
+			status = http.StatusOK
+		}
+
+		handler.render.RenderLayoutWithStatus(r, w, comp, user, status)
+	}
+}
+
+func (handler IndexImpl) handleEmpty() http.HandlerFunc {
+	return func(w http.ResponseWriter, r *http.Request) {
+		// Return nothing
+	}
+}