public async Task <FriendshipRequestResult> SendFriendshipRequest(SendFriendshipRequestDto friendshipRequestDto)
{
var validationResult = AnnotationValidator.TryValidate(friendshipRequestDto);
if (validationResult.Failed)
{
if (friendshipRequestDto.From.NameTag == friendshipRequestDto.ToNameTag)
{
return(FriendshipRequestResult.Fail(validationResult.Error.ToErrorList().AddError("ToNameTag", "Cannot send a friendship request to yourself.")));
}
return(FriendshipRequestResult.Fail(validationResult.Error.ToErrorList()));
}
if (friendshipRequestDto.From.NameTag == friendshipRequestDto.ToNameTag)
{
return(FriendshipRequestResult.Fail(new ErrorList().AddError("ToNameTag", "Cannot send a friendship request to yourself.")));
}
var nameTag = friendshipRequestDto.ToNameTag.Split('#');
var displayName = nameTag[0];
var tag = DiscriminatorTag.Parse(nameTag[1]);
var toUser = await _accountRepository.GetFirstAsync(new NameTagEqualSpecification(tag, displayName));
if (toUser == null)
{
return(FriendshipRequestResult.Fail(new ErrorList().AddError("ToNameTag", "User does not exists.")));
}
var isAlreadyFriend = await _friendshipRepository.GetFirstAsync(new FriendshipExistsSpecification(friendshipRequestDto.From.Id, toUser.Id));
if (isAlreadyFriend != null)
{
var errorMessage = isAlreadyFriend.Accepted
? "You are already friends with this user"
: isAlreadyFriend.FromId == friendshipRequestDto.From.Id
? "You have already sent a friendship request to this user."
: "The user has already sent a friendship request to you.";
return(FriendshipRequestResult.Fail(new ErrorList().AddError("Friendship", errorMessage)));
}
var friendship = new Friendship(friendshipRequestDto.From, toUser);
await _friendshipRepository.InsertAsync(friendship);
await _friendshipRepository.CommitAsync();
return(FriendshipRequestResult.Ok(friendship));
}
public async Task <FriendshipRequestResult> DeclineFriendshipRequestAsync(ApplicationUser user, Guid fromUserId)
{
var friendshipRequest = await _friendshipRepository.GetFirstAsync(new FriendshipExistsSpecification(fromUserId, user.Id));
if (friendshipRequest == null)
{
return(FriendshipRequestResult.Fail(new ErrorList().AddError("Friendship", "Friendship request does not exist.")));
}
if (friendshipRequest.Accepted)
{
return(FriendshipRequestResult.Fail(new ErrorList().AddError("Friendship", "Friendship request already accepted.")));
}
await _friendshipRepository.DeleteAsync(friendshipRequest);
await _friendshipRepository.CommitAsync();
return(FriendshipRequestResult.Ok(friendshipRequest));
}