Question Combining UniTask.WhenAll and UniTask.WhenAny

I recently adopted async/await and currently using Cysharp happily. One thing I couldn't wrap my head around is combining UniTask.WhenAll and UniTask.WhenAny. I'm trying to create a panel where the player just enters a name and presses enter or clicks continue. I want to make sure that the name is at least one character long. Here are two of my unsuccessful attempts,
1

Code (CSharp):

1. public override async UniTask<IResult> Push(string name)
2.     {
3.         await base.Push();
4.  
5.         _nameInputField.text = name;
6.         _nameInputField.ActivateInputField();
7.      
8.         var nameLengthTask = UniTask.WaitWhile(() => _nameInputField.text.Length == 0);
9.         var continueButtonTask = _continueButton.OnClickAsync();
10.         var c1 = UniTask.WhenAll(nameLengthTask, continueButtonTask);
11.         var enterKeyTask = WaitForKeyDown(KeyCode.Return);
12.         var c2 = UniTask.WhenAll(nameLengthTask, enterKeyTask);
13.  
14.         await UniTask.WhenAny(c1, c2);
15.  
16.         await Pop();
17.         IResult r = new StringResult(_nameInputField.text);
18.  
19.         return r;
20.     }

2

Code (CSharp):

1. public override async UniTask<IResult> Push(string name)
2.     {
3.         await base.Push();
4.  
5.         _nameInputField.text = name;
6.         _nameInputField.ActivateInputField();
7.      
8.         var nameLengthTask = UniTask.WaitUntil(() => _nameInputField.text.Length > 0);
9.         var continueButtonTask = _continueButton.OnClickAsync();
10.         var enterKeyTask = WaitForKeyDown(KeyCode.Return);
11.         var combined = UniTask.WhenAny(continueButtonTask, enterKeyTask);
12.  
13.         await UniTask.WhenAll(nameLengthTask, combined);
14.  
15.         await Pop();
16.         IResult r = new StringResult(_nameInputField.text);
17.  
18.         return r;
19.     }

 

I dunno what any of that jibba-jabba above is, but usually I just keep the ACCEPT button grayed out until the text has at least one character. I try to spend as little time as possible with user input validation code, but I'm funny that way.

 

Here is a working example for the person who will find this post in the next 5 years.

Code (CSharp):

1. public override async UniTask<IResult> Push(string name)
2.     {
3.         await base.Push();
4.  
5.         _nameInputField.text = name;
6.         _nameInputField.ActivateInputField();
7.  
8.         var isNameEntered = false;
9.         while (!isNameEntered)
10.         {
11.             isNameEntered = await WaitForName();
12.         }
13.  
14.         await Pop();
15.         IResult r = new StringResult(_nameInputField.text);
16.  
17.         return r;
18.     }
19.  
20.     private async UniTask<bool> WaitForName()
21.     {
22.         var cts = new CancellationTokenSource();
23.         var continueButtonTask = _continueButton.OnClickAsync(cts.Token);
24.         var enterKeyTask = WaitForKeyDown(KeyCode.Return);
25.         await UniTask.WhenAny(continueButtonTask, enterKeyTask);
26.         cts.Cancel();
27.         cts.Dispose();
28.         if (_nameInputField.text.Length != 0)
29.         {
30.             return true;
31.         }
32.  
33.         return false;
34.     }

 

try 13 years later <3

 

May 31 2021 to Nov 15 2022 is 13 years, maybe on planet Gargantua