/// <summary>
/// Trigger the build and output of Posts to the STDOUT stream
/// </summary>
public void Handle(Options options, IConsoleStream consoleStream)
{
// Validate that the number of Posts does not exceed 100
if (options.Posts < 1 || options.Posts > 100)
{
consoleStream.WriteErrorLine("Number of posts must be a positive integer not exceeding 100");
return;
}
var postSerializer = new JsonSerializer();
consoleStream.JsonWriter.Formatting = Formatting.Indented;
int postCounter = 1;
// Write the start of the Json Array to the STDOUT stream
consoleStream.JsonWriter.WriteStartArray();
// Write each post to the Array in the STDOUT stream
// This continues to use Linq Lazy Evaluation to write one valid post to the STDOUT stream
// at a time
var posts = service.GetTopPosts(consoleStream)
.Where(PostValidator.Validate)
.Where(p => SerializePost(postSerializer, consoleStream, p, postCounter++))
.Take(options.Posts)
.ToList();
// Write the end of the Json Array to the STDOUT stream
consoleStream.JsonWriter.WriteEndArray();
}
