public static sortTasksWithParents()

in src/gantt.ts [1105:1146]
33 lines of code
11 McCabe index (conditional complexity)

    public static sortTasksWithParents(tasks: Task[], sortingOptions: SortingOptions): Task[] {
        const sortingFunction = ((a: Task, b: Task) => {
            if (a.name < b.name) {
                return sortingOptions.sortingDirection === SortDirection.Ascending ? -1 : 1;
            }

            if (a.name > b.name) {
                return sortingOptions.sortingDirection === SortDirection.Ascending ? 1 : -1;
            }

            return 0;
        });

        if (sortingOptions.isCustomSortingNeeded) {
            tasks.sort(sortingFunction);
        }

        let index: number = 0;
        tasks.forEach(task => {
            if (!task.index && !task.parent) {
                task.index = index++;

                if (task.children) {
                    if (sortingOptions.isCustomSortingNeeded) {
                        task.children.sort(sortingFunction);
                    }

                    task.children.forEach(subtask => {
                        subtask.index = subtask.index === null ? index++ : subtask.index;
                    });
                }
            }
        });

        let resultTasks: Task[] = [];

        tasks.forEach((task) => {
            resultTasks[task.index] = task;
        });

        return resultTasks;
    }