protected async Task <CodeGeneratorResult> ValidateAttempt(int retry, string attempt)
{
var result = new CodeGeneratorResult
{
Reason = FailureReasonType.None,
Retries = retry,
Value = null
};
if (await stopWords.IsAllowedAsync(attempt))
{
if (await uniqueness.IsUniqueAsync(attempt))
{
result.Value = attempt;
result.Success = true;
}
else
{
result.Reason = FailureReasonType.Uniqueness;
}
}
else
{
result.Reason = FailureReasonType.Stopped;
}
if (transformer != null && result.Success)
{
result = await transformer.Transform(result);
}
return(result);
}
public AfterAttemptEvent(CodeGeneratorResult result)
{
Result = new CodeGeneratorResult
{
Reason = result.Reason,
Retries = result.Retries,
Value = result.Value,
Success = result.Success
};
}
private static string BuildMessage(CodeGeneratorResult result)
{
switch (result.Reason)
{
case FailureReasonType.Uniqueness:
return($"Failed due to uniqueness after {result.Retries} attempts.");
case FailureReasonType.Stopped:
return($"Failed due to stop words after {result.Retries} attempts.");
case FailureReasonType.None:
default:
return("Unknown exception during code generation");
}
}
public virtual async ValueTask <CodeGeneratorResult> TryGenerateAsync(int length)
{
CodeGeneratorResult result = null;
for (var retry = 1; retry <= options.RetryLimit; retry++)
{
await OnBeforeAttempt(new BeforeAttemptEvent(retry));
var attempt = await GenerateAttemptAsync(length);
result = await ValidateAttempt(retry, attempt);
await OnAfterAttempt(new AfterAttemptEvent(result));
if (result.Success)
{
return(result);
}
}
return(result ?? new CodeGeneratorResult());
}
public CodeGeneratorException(CodeGeneratorResult result)
: base(BuildMessage(result))
{
Result = result;
}