How can i simplify these methods to avoid duplicate code?

November 9, 2022

Is there a way to simplify these methods? They are the same except for a different method being called.

private async Task ChangePresence(bool args, int voteId)
    {
        if (GeneralMeetingState.GeneralMeeting != null)
        {
            _spinnerVisible = true;

            await AgendaItemsDetailState.ChangePresence(args, GeneralMeetingState.GeneralMeeting.ID,
                AgendaItemId, voteId);
            await AgendaState.GetAgendaItem(GeneralMeetingState.GeneralMeeting.ID, AgendaItemId);
            await AgendaItemsDetailState.GetVotesList(GeneralMeetingState.GeneralMeeting.ID, AgendaItemId);

            _spinnerVisible = false;
        }
    }

    private async Task VoteFor(bool args, int voteId)
    {
        if (GeneralMeetingState.GeneralMeeting != null)
        {
            _spinnerVisible = true;

            await AgendaItemsDetailState.ChangeVoteFor(args, GeneralMeetingState.GeneralMeeting.ID,
                AgendaItemId, voteId, GeneralMeetingState.IsUserOwner);
            await AgendaState.GetAgendaItem(GeneralMeetingState.GeneralMeeting.ID, AgendaItemId);
            await AgendaItemsDetailState.GetVotesList(GeneralMeetingState.GeneralMeeting.ID, AgendaItemId);

            _spinnerVisible = false;
        }
    }

    private async Task VoteAgainst(bool args, int voteId)
    {
        if (GeneralMeetingState.GeneralMeeting != null)
        {
            _spinnerVisible = true;

            await AgendaItemsDetailState.ChangeVoteAgainst(args, GeneralMeetingState.GeneralMeeting.ID,
                AgendaItemId, voteId, GeneralMeetingState.IsUserOwner);
            await AgendaState.GetAgendaItem(GeneralMeetingState.GeneralMeeting.ID, AgendaItemId);
            await AgendaItemsDetailState.GetVotesList(GeneralMeetingState.GeneralMeeting.ID, AgendaItemId);

            _spinnerVisible = false;
        }
    }

    private async Task ChangeVoteAbstinence(bool args, int voteId)
    {
        if (GeneralMeetingState.GeneralMeeting != null)
        {
            _spinnerVisible = true;

            await AgendaItemsDetailState.ChangeVoteAbstinence(args, GeneralMeetingState.GeneralMeeting.ID,
                AgendaItemId, voteId, GeneralMeetingState.IsUserOwner);
            await AgendaState.GetAgendaItem(GeneralMeetingState.GeneralMeeting.ID, AgendaItemId);
            await AgendaItemsDetailState.GetVotesList(GeneralMeetingState.GeneralMeeting.ID, AgendaItemId);

            _spinnerVisible = false;
        }
    }

I was looking into passing a method as a parameter and using Action<bool, int> but i couldn’t figure it out. Any help is much appreciated

>Solution :

The idea to pass Action<bool, int> seems to be almost the right one. The easiest one would be passing just Func<Task>. Something along this lines:

// TODO - give more meaningful name
private async Task DoSomething(Func<Task> something)
{
    if (GeneralMeetingState.GeneralMeeting != null)
    {
        _spinnerVisible = true;

        await something();
        await AgendaState.GetAgendaItem(GeneralMeetingState.GeneralMeeting.ID, AgendaItemId);
        await AgendaItemsDetailState.GetVotesList(GeneralMeetingState.GeneralMeeting.ID, AgendaItemId);

        _spinnerVisible = false;
    }
}

And methods changed to the following:

private async Task ChangePresence(bool args, int voteId)
{
    await DoSomething(() => AgendaItemsDetailState.ChangePresence(args, GeneralMeetingState.GeneralMeeting.ID, AgendaItemId, voteId))
}