refactor template rendering logic to one base template

controllers/getHandlers.go

@@ -1,7 +1,6 @@
 package controllers
 
 import (
-	"fmt"
 	"html/template"
 	"net/http"
 	"officeHours/models"
@@ -28,6 +27,7 @@ func (b *BaseHandler) GetByCourseHandler(w http.ResponseWriter, req *http.Reques
 	courseid, err := strconv.Atoi(req.FormValue("veranstaltung"))
 	if err != nil {
 		b.RootHandler(w, req)
+		return
 	}
 	course, err := b.courseRepo.FindById(courseid)
 	if err != nil {
@@ -51,9 +51,5 @@ func (b *BaseHandler) writeTimetablePage(w http.ResponseWriter, req *http.Reques
 		SelectedRoom   int
 		SelectedCourse int
 	}{courses, rooms, timetable, selectedRoom, selectedCourse}
-	err := Templates.ExecuteTemplate(w, "index.html", data)
-	if err != nil {
-		w.Write([]byte(fmt.Sprintf("Template konnte nicht geparst werden : %s", err.Error())))
-		return
-	}
+	b.serveTemplate(w, "index", data)
 }