[HttpPost("friends/add")] // UNTESTED
public async Task <IActionResult> AddFriend([FromBody] string username)
{
User user = await UserManager.GetUserAsync(User);
User friend = await UserManager.FindByNameAsync(username);
if (friend.Equals(null))
{
return(BadRequest($"{username} doesn't exist"));
}
// Find if there is already a relation established between users
bool isFriend = (from relation in Database.UserRelations
where (relation.FromUserId == user.UserName && relation.ToUserId == username) ||
(relation.ToUserId == user.UserName && relation.FromUserId == username)
select relation)
.Any();
if (isFriend)
{
return(BadRequest("Users are already friends"));
}
// Find if there are any friends request between the users
isFriend = (from request in Database.Requests
where (request.UserName == user.UserName && request.Target == friend.UserName) ||
(request.UserName == friend.UserName && request.Target == user.UserName)
select request).Any();
if (isFriend)
{
return(BadRequest($"A friend request between {user.UserName} and {friend.UserName} already exists"));
}
Database.Requests.Add(new Request()
{
Target = friend.UserName, User = user
});
// Add a new relation between the two users, with time of creation being NOW
Database.UserRelations.Add(new UserRelation()
{
FromUser = user,
ToUser = friend,
Date = DateTime.UtcNow
});
await Database.SaveChangesAsync();
return(Ok());
}