public async Task <int> RunAsync(string[] args)
{
try
{
// Parse the command line arguments.
var optionsParseResult = _optionsProvider.ParseArguments(args);
if (!optionsParseResult.ParsedSuccessfully)
{
// Display the help text if the arguments could not be parsed.
_outputWriter.WriteLine(optionsParseResult.HelpText);
return(-1);
}
var options = optionsParseResult.Options;
// Retrieve the posts from HackerNews
var posts = await _hackerNewsTopPostRetriever.GetTopPostsAsync(options.NumberOfPosts);
// Output the posts to the user.
var json = _jsonSerializer.Serialize(posts);
_outputWriter.WriteLine(json);
return(0);
}
catch (Exception ex)
{
_outputWriter.WriteLine("An unexpected error has occurred:");
_outputWriter.WriteLine(ex.Message);
_outputWriter.WriteLine(ex.StackTrace);
return(-1);
}
}