public void SendChatMessage(string gameId, string username, string message, Action <StatusCode> completion)
{
DocumentReference chatRef = db.Collection("chats").Document(gameId);
StatusCode transactionStatus = StatusCode.OK;
db.RunTransactionAsync(async transaction => {
DocumentSnapshot chat = await transaction.GetSnapshotAsync(chatRef);
if (!chat.Exists)
{
transactionStatus = StatusCode.UNKNWON;
return(false);
}
ChatState chatState = chat.ConvertTo <ChatState>();
chatState.AddMessage(username, message);
transaction.Set(chatRef, chatState);
return(true);
}).ContinueWithOnMainThread(task => {
completion(transactionStatus);
});
}