/// <summary>
/// Calculates the redirect to message with the id specified. This is a response to the index action on the thread controller, with the proper page and '#' id redirect.
/// </summary>
/// <param name="threadId">The thread identifier.</param>
/// <param name="messageId">The message identifier.</param>
/// <returns></returns>
private async Task <ActionResult> CalculateRedirectToMessageAsync(int threadId, int messageId)
{
var maxAmountMessagesPerPage = this.HttpContext.Session.GetUserDefaultNumberOfMessagesPerPage();
var idOfStartMessage = await ThreadGuiHelper.GetStartAtMessageForGivenMessageAndThreadAsync(threadId, messageId, maxAmountMessagesPerPage);
int startAtMessageNo = messageId > 0 ? idOfStartMessage : 0;
int currentPageNo = (startAtMessageNo / maxAmountMessagesPerPage) + 1;
return(Redirect(this.Url.Action("Index", "Thread", new { threadId = threadId, pageNo = currentPageNo }) + "#" + messageId));
}
