feat:#11 fixed groupBy request for modules

backend/service/events/eventService.go

@@ -13,17 +13,28 @@ import (
 func GetModulesForCourseDistinct(app *pocketbase.PocketBase, course string, semester string) (model.Events, error) {
 
 	modules, err := db.GetAllModulesForCourse(app, course, semester)
-	replaceEmptyEntry(modules, "Sonderveranstaltungen")
+
+	// Convert the []model.Module to []Named
+	var namedEvents []Named
+	for _, module := range modules {
+		namedEvents = append(namedEvents, &module)
+	}
+
+	replaceEmptyEntry(namedEvents, "Sonderveranstaltungen")
 	return modules, err
 }
 
+type Named interface {
+	GetName() string
+	SetName(name string)
+}
+
 // replaceEmptyEntry replaces an empty entry in a module with a replacement string
 // If the module is not empty, nothing happens
-func replaceEmptyEntry(modules model.Events, replacement string) {
-
-	for i, module := range modules {
-		if functions.OnlyWhitespace(module.Name) {
-			modules[i].Name = replacement
+func replaceEmptyEntry(namedList []Named, replacement string) {
+	for i, namedItem := range namedList {
+		if functions.OnlyWhitespace(namedItem.GetName()) {
+			namedList[i].SetName(replacement)
 		}
 	}
 }
@@ -33,7 +44,12 @@ func replaceEmptyEntry(modules model.Events, replacement string) {
 func GetAllModulesDistinct(app *pocketbase.PocketBase, c echo.Context) error {
 	modules, err := db.GetAllModulesDistinctByNameAndCourse(app)
 
-	replaceEmptyEntry(modules, "Sonderveranstaltungen")
+	var namedModules []Named
+	for _, module := range modules {
+		namedModules = append(namedModules, &module)
+	}
+
+	replaceEmptyEntry(namedModules, "Sonderveranstaltungen")
 
 	if err != nil {
 		return c.JSON(400, err)