feat(cookies): UnmarshalIfRequest helper/alias function

handlers/pages/dashboard.templ

@@ -2,7 +2,6 @@ package pages
 
 import (
 	"net/http"
-	"errors"
 	"log"
 	"strconv"
 
@@ -32,15 +31,10 @@ func (p *Dashboard) ServeHTTP(w http.ResponseWriter, r *http.Request) {
 
 	hasCookie := true
 
-	var c DashboardCookie
-	if err := cookies.UnmarshalRequest(r, &c); errors.Is(err, cookies.ErrNoCookie{}) {
-		hasCookie = false
-		c = DashboardCookie{Hello: "Hello world", Bool: true, Test: 69420}
-	} else if err != nil {
+	c := DashboardCookie{"hello world", true, 0}
+	if _, err := cookies.UnmarshalIfRequest(r, &c); err != nil {
 		rerrors.InternalError(err).ServeHTTP(w, r)
 		return
-	} else {
-		hasCookie = true
 	}
 
 	log.Print(hasCookie, c)

lib/cookies/cookies.go

@@ -73,6 +73,18 @@ func UnmarshalRequest(r *http.Request, v any) error {
 	return Unmarshal(c, v)
 }
 
+func UnmarshalIfRequest(r *http.Request, v any) (bool, error) {
+	if err := UnmarshalRequest(r, v); err != nil {
+		if _, ok := err.(ErrNoCookie); ok {
+			return false, nil
+		} else {
+			return true, err
+		}
+	} else {
+		return true, nil
+	}
+}
+
 func RerrUnmarshalCookie(err error) rerrors.RouteError {
 	if e, ok := err.(ErrNoCookie); ok {
 		return rerrors.MissingCookies([]string{e.name})