public async Task <IActionResult> FetchInvitationsAsync([FromQuery] ClanId?clanId = null, [FromQuery] UserId?userId = null)
{
if (clanId == null && userId == null)
{
return(this.BadRequest("No query parameter as been provided."));
}
if (clanId != null && userId != null)
{
return(this.BadRequest("Only one query parameter must be provided."));
}
var invitations = new List <Invitation>();
if (clanId != null)
{
invitations.AddRange(await _invitationService.FetchInvitationsAsync(clanId));
}
if (userId != null)
{
invitations.AddRange(await _invitationService.FetchInvitationsAsync(userId));
}
if (!invitations.Any())
{
return(this.NoContent());
}
return(this.Ok(_mapper.Map <IEnumerable <InvitationDto> >(invitations)));
}