// • InviteToTeam <teamName> <username>
public string Execute(string[] args)
{
Checker.CheckLength(2, args);
User currentUser = AuthenticationManager.GetCurrentUser();
string teamName = args[0];
string userName = args[1];
if (!Checker.IsMemberOfTeam(teamName, currentUser.Username) || Checker.IsMemberOfTeam(teamName, userName))
{
throw new InvalidOperationException(Constants.ErrorMessages.NotAllowed);
}
if (!Checker.IsTeamExisting(teamName) || !Checker.IsUserExisting(userName))
{
throw new ArgumentException(Constants.ErrorMessages.TeamOrUserNotExist);
}
User invitedUser = ContextHelper.GetUserByUsername(userName);
if (Checker.IsInviteExisting(teamName, invitedUser))
{
throw new InvalidOperationException(Constants.ErrorMessages.InviteIsAlreadySent);
}
bool isUserCreatorOfTheTeam = Checker.IsUserCreatorOfTeam(teamName, currentUser);
string result = null;
if (isUserCreatorOfTheTeam)
{
result = ContextHelper.AddToTeam(teamName, invitedUser);
}
else
{
result = ContextHelper.SendInvitation(teamName, invitedUser);
}
return(result);
}