adjusted events view to only show the availability selector, when a user can do at least one task of the event

backend/pkg/db/users/User.go

@@ -177,6 +177,14 @@ func (userName UserName) ChangePassword(password string) (string, error) {
 	}
 }
 
+func (userName UserName) GetTasks() ([]tasks.TaskID, error) {
+	var tasks []tasks.TaskID
+
+	err := db.DB.Select(&tasks, "SELECT taskID FROM USER_TASKS WHERE userName = $1", userName)
+
+	return tasks, err
+}
+
 func (userName UserName) SetTasks(tasks []tasks.TaskID) error {
 	// remove all current possible tasks
 	if _, err := db.DB.Exec("DELETE FROM USER_TASKS WHERE userName = $1", userName); err != nil {

backend/pkg/router/router.go

@@ -99,6 +99,7 @@ func init() {
 			"events/user/assigned": (*Handler).getEventsUserAssigned,
 			"tasks":                (*Handler).getTasks,          // all available tasks
 			"users":                (*Handler).getUsers,          // all users
+			"user/tasks":           (*Handler).getUserTasks,      // get all possible tasks for the user
 			"availabilities":       (*Handler).getAvailabilities, // all available availabilities
 		},
 		"POST": {

backend/pkg/router/user.go

@@ -20,6 +20,16 @@ func (a *Handler) getUsers() {
 	}
 }
 
+func (a *Handler) getUserTasks() {
+	if tasks, err := a.UserName.GetTasks(); err != nil {
+		a.Status = fiber.StatusInternalServerError
+
+		logger.Error().Msgf("getting possible user-tasks failed: %v", err)
+	} else {
+		a.Data = tasks
+	}
+}
+
 func (a *Handler) postUser() {
 
 	// check admin