public async Task RunAsync(string directoryPath, string outputFilePath)
{
if (!_directoryPathValidator.ValidateDirectoryPath(directoryPath))
{
_notifier.NotifyUser($"The directory {directoryPath ?? "<null>"} is invalid or does not exist. Service shuts down.");
return;
}
if (!_pathHelper.CanWrite(outputFilePath))
{
_notifier.NotifyUser($"Cannot write on path {outputFilePath ?? "<null>"}. Service shuts down.");
return;
}
var fullDirectoryPath = _pathHelper.GetFullPath(directoryPath);
var fullOutputFilePath = _pathHelper.GetFullPath(outputFilePath);
_notifier.NotifyUser($"Service started listening at {fullDirectoryPath}");
_peopleCache.Initialize(fullDirectoryPath);
SerializeResults(_peopleAverageAgeEvaluator.ComputePeopleAverageAge(_peopleCache.GetPeople()), fullOutputFilePath);
await InitializeDirectoryMonitorAsync(fullDirectoryPath, fullOutputFilePath);
}