Apply suggestions from code review

Co-authored-by: Henry <111202+cryptix@users.noreply.github.com>

use eh.Handle

web/handlers/admin/settings.go

@@ -115,13 +115,13 @@ func (h settingsHandler) getMember(w http.ResponseWriter, req *http.Request) *ro
 
 func (h settingsHandler) verifyPostRequirements(w http.ResponseWriter, req *http.Request) bool {
 	if req.Method != "POST" {
-		// TODO: proper error type
-		h.r.Error(w, req, http.StatusBadRequest, fmt.Errorf("bad request"))
+		err := weberrors.ErrBadRequest{Where: "HTTP Method", Details: fmt.Errorf("expected POST not %s", req.Method)}
+		h.r.Error(w, req, http.StatusBadRequest, err)
 		return false
 	}
 	if err := req.ParseForm(); err != nil {
-		// TODO: proper error type
-		h.r.Error(w, req, http.StatusBadRequest, fmt.Errorf("bad request: %w", err))
+		err = weberrors.ErrBadRequest{Where: "Form data", Details: err}
+		h.r.Error(w, req, http.StatusBadRequest, err)
 		return false
 	}
 	return true

web/handlers/http.go

@@ -283,14 +283,16 @@ func New(
 
 		session, err := cookieStore.Get(req, i18n.LanguageCookieName)
 		if err != nil {
-			fmt.Errorf("cookie error? %w\n", err)
+			eh.Handle(w, req, http.StatusInternalServerError,err)
 			return
 		}
 
 		session.Values["lang"] = lang
 		err = session.Save(req, w)
 		if err != nil {
-			fmt.Errorf("we failed to save the language session cookie %w\n", err)
+			err = fmt.Errorf("we failed to save the language session cookie %w\n", err)
+			eh.Handle(w, req, http.StatusInternalServerError, err)
+			return
 		}
 
 		http.Redirect(w, req, previousRoute, http.StatusSeeOther)

web/handlers/set_language_test.go

@@ -9,7 +9,6 @@ import (
 
 	"github.com/stretchr/testify/assert"
 
-	// "github.com/ssb-ngi-pointer/go-ssb-room/roomdb"
 	"github.com/ssb-ngi-pointer/go-ssb-room/web/i18n"
 	"github.com/ssb-ngi-pointer/go-ssb-room/web/router"
 )