/// <summary>
/// Go and process the request, executing the output action
/// </summary>
/// <param name='options'>
/// Options for processing
/// </param>
/// <param name="manager">
/// The manager
/// </param>
/// <param name='outputAction'>
/// Output action.
/// </param>
public static void Go(Option options, IFeedManager manager, Action<string> outputAction)
{
if (options == null)
{
throw new ArgumentNullException("options");
}
if (manager == null)
{
throw new ArgumentNullException("manager");
}
if (outputAction == null)
{
throw new ArgumentNullException("outputAction");
}
Execute(options, manager, outputAction);
}
/// <summary>
/// Process the request, executing the output action
/// </summary>
/// <param name='options'>
/// Options for processing
/// </param>
/// <param name="manager">
/// The manager
/// </param>
/// <param name='outputAction'>
/// Output action.
/// </param>
private static void Execute(Option options, IFeedManager manager, Action<string> outputAction)
{
XmlWriter writer = null;
var serializer = new JavaScriptSerializer();
try
{
var buffer = new System.Text.StringBuilder();
if (options.Format == Format.Xml)
{
writer = XmlWriter.Create(buffer);
}
PrintHeader(options.Format, writer, buffer);
bool firstFeed = true;
foreach (var feed in manager.Get(options.InputFile))
{
bool hasChild = true;
bool firstItem = true;
foreach (var item in manager.GetItems(feed, options.Since, options.IgnoreCerts))
{
if (hasChild)
{
if (options.Format == Format.Json)
{
if (!firstFeed)
{
buffer.Append(",");
}
firstFeed = false;
}
PrintFeed(options.Format, feed, outputAction, writer, buffer, serializer);
hasChild = false;
}
if (options.Format == Format.Json)
{
if (!firstItem)
{
buffer.Append(",");
}
firstItem = false;
}
PrintItem(options.Format, item, outputAction, writer, buffer, serializer);
if (buffer.Length >= FlushBuffer)
{
outputAction(buffer.ToString());
buffer.Clear();
}
}
if (!hasChild)
{
PrintFeedEnd(options.Format, writer, buffer);
}
}
PrintEnd(options.Format, writer, buffer);
if (options.Format != Format.Console)
{
outputAction(buffer.ToString());
}
}
finally
{
if (writer != null)
{
((IDisposable)writer).Dispose();
}
}
}
/// <summary>
/// Parses the arguments.
/// </summary>
/// <returns>
/// The arguments in an option wrapper for operations
/// </returns>
/// <param name='arguments'>
/// Arguments to parse.
/// </param>
public static Option ParseArguments(string[] arguments)
{
Option options = new Option();
if (arguments == null || arguments.Length > 0)
{
IList<string> foundArguments = new List<string>();
for (int index = 0; index < arguments.Length; index++)
{
string argument = arguments[index];
if (foundArguments.Contains(argument))
{
throw new NotSupportedException("Argument can not be specified more than once: " + argument);
}
foundArguments.Add(argument);
if (argument.Equals(DebugArgument))
{
SimpleLogger.AttachLogger();
continue;
}
if (argument.Equals(IgnoreCertsArgumentValue))
{
options.IgnoreCerts = true;
continue;
}
if (index + 1 >= arguments.Length)
{
throw new ArgumentException("Invalid argument parameter for " + argument);
}
index++;
string parameter = arguments[index];
switch (argument)
{
// Set the output format
case FormatArgumentValue:
Format formatOut;
if (!Enum.TryParse<Format>(parameter, true, out formatOut))
{
throw new ArgumentException("Invalid format " + parameter);
}
options.Format = formatOut;
break;
// Set the input file
case InputArgumentValue:
options.InputFile = parameter;
break;
// Set the date period since to retrieve articles for
case SinceArgumentValue:
DateTime timeOut;
if (!DateTime.TryParse(parameter, out timeOut))
{
throw new ArgumentException("Invalid date/time " + parameter);
}
options.Since = timeOut;
break;
default:
throw new NotSupportedException("Invalid argument");
}
}
if (Logger.DoLog)
{
foreach (var arg in arguments)
{
Logger.Write(arg);
}
}
}
return options;
}
