/// <summary>
/// Adds the before delegate to the Before pipeline if the module is not currently executing,
/// or executes the delegate directly and returns any response returned if it is.
/// Uses <see cref="RouteExecutionEarlyExitException"/>
/// </summary>
/// <param name="module">Current module</param>
/// <param name="beforeDelegate">Delegate to add or execute</param>
/// <param name="earlyExitReason">Optional reason for the early exit (if necessary)</param>
public static void AddBeforeHookOrExecute(this INancyModule module, Func <NancyContext, Response> beforeDelegate, string earlyExitReason = null)
{
if (module.RouteExecuting())
{
var result = beforeDelegate.Invoke(module.Context);
if (result != null)
{
throw new RouteExecutionEarlyExitException(result, earlyExitReason);
}
}
else
{
module.Before.AddItemToEndOfPipeline(beforeDelegate);
}
}