public async Task<HttpResponseMessage> SendFriendRequest([FromUri] string username)
{
var targetUser = this.Data.Users.FirstOrDefault(u => u.UserName == username);
if (targetUser == null)
{
return await this.NotFound().ExecuteAsync(new CancellationToken());
}
var currentUserId = User.Identity.GetUserId();
var currentUser = this.Data.Users.FirstOrDefault(x => x.Id == currentUserId);
if (currentUser == null)
{
return await this.BadRequest("Invalid user token! Please login again!").ExecuteAsync(new CancellationToken());
}
if (currentUser == targetUser)
{
return await this.BadRequest("You cannot send friendship request to yourself.").ExecuteAsync(new CancellationToken());
}
if (targetUser.Friends.Contains(currentUser))
{
return await this.BadRequest("User is already a friend.").ExecuteAsync(new CancellationToken());
}
if (targetUser.Requests.Any(r => r.Sender == currentUser))
{
return await this.BadRequest("A request already exists.").ExecuteAsync(new CancellationToken());
}
var request = new FriendshipRequest()
{
Sender = currentUser,
Recipient = targetUser,
Status = FriendRequestStatus.Pending
};
targetUser.Requests.Add(request);
this.Data.SaveChanges();
return await this.Ok("Friend request sent.").ExecuteAsync(new CancellationToken());
}
private MessageViewModel DenyFriendRequest(FriendshipRequest request, ApplicationUser me)
{
request.Status = FriendRequestStatus.Rejected;
this.Data.SaveChanges();
return new MessageViewModel("Friend request successfully declined.");
}
private MessageViewModel ApproveFriendRequest(FriendshipRequest request, ApplicationUser me)
{
request.Status = (FriendRequestStatus)1;
me.Friends.Add(request.Sender);
this.Data.SaveChanges();
return new MessageViewModel("Friend request successfully approved.");
}
private MessageViewModel ProcessCommand(bool isApproved, FriendshipRequest request, ApplicationUser me)
{
MessageViewModel message = null;
if (request.Status == FriendRequestStatus.Pending)
{
if (isApproved == false)
{
message = DenyFriendRequest(request, me);
}
else
{
message = ApproveFriendRequest(request, me);
}
}
else if (request.Status == FriendRequestStatus.Approved)
{
message = new MessageViewModel("Friend request has already been approved. "
+ request.Sender.UserName + " is among your friend list.");
}
else
{
message = new MessageViewModel("Friend request has already been denied.");
}
return message;
}
